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  Intelligent Mining Technology for an Underground Metal Mine Based on Unmanned Equipme
Posted by: cagamica - 17-09-2021, 10:20 AM - Forum: Fixture Library Requests - No Replies

Intelligent Mining Technology for an Underground Metal Mine Based on Unmanned Equipment

    This article presents facts and figures on mining equipment safety and reviews various important aspects of mining equipment safety including quarry accidents, electrical accidents, equipment fires, maintenance-related mining accidents, causes of mining equipment accidents and major ignition sources for mining equipment fires. A number of methods considered useful for performing mining equipment safety analysis are also presented. Useful strategies to reduce mining equipment fires and injuries, guidelines to improve electrical safety in the mining industry, and human-factor-related tips for safer mining equipment are discussed.

    This article analyzes the current research status and development trend of intelligent technologies for underground metal mines in China, where such technologies are under development for use to develop mineral resources in a safe, efficient, and environmentally friendly manner. We analyze and summarize the research status of underground metal mining technology at home and abroad, including some specific examples of equipment, technology, and applications. We introduce the latest equipment and technologies with independent intellectual property rights for unmanned mining, including intelligent and unmanned control technologies for rock-drilling jumbos, down-the-hole (DTH) drills, underground scrapers, underground mining trucks, and underground charging vehicles. Three basic platforms are used for intelligent and unmanned mining: the positioning and navigation platform, information-acquisition and communication platform, and scheduling and control platform. Unmanned equipment was tested in the Fankou Lead-Zinc Mine in China, and industrial tests on the basic platforms of intelligent and unmanned mining were carried out in the mine. The experiment focused on the intelligent scraper, which can achieve autonomous intelligent driving by relying on a wireless communication system, location and navigation system, and data-acquisition system. These industrial experiments indicate that the technology is feasible. The results show that unmanned mining can promote mining technology in China to an intelligent level and can enhance the core competitive ability of China’s mining industry.

    With the world’s rapid economic development, the demand for mineral resources is increasing. It has been forecast that the depth of more than 33% of the metal mines in China will reach or exceed 1000?m within the next decade. Deep underground mining will become the trend of metal mining in China [1]. To overcome the disadvantages of traditional mining methods, such as excessive resource consumption, poor operating environments, low production efficiency, high safety risks, high production costs, and severe pollution, it is essential to develop an intelligent mining technology for underground metal mines that provides complete safety, environmental protection, and efficiency [2], [3]. Some developed countries have done a great deal of work in the field of intelligent mining for underground metal mines over many years, and thus have considerable experience in this field. At the beginning of the 21st century, Canada, Finland, Sweden, and other developed countries made plans for intelligent and unmanned mining. At the Stobie Mine, an underground mine belonging to the International Nickel Company of Canada, Ltd. and a typical example of such an automated mine, mobile devices such as scrapers, rock drills, and underground mining trucks are operated remotely and workers can operate the equipment directly from the central control room on the surface [4]. According to the Canadian government’s 2050 long-range plan, Canada intends to transform one of its underground mines in the northern part of the country into an unmanned mine. The plan states that all devices will be controlled from Sudbury via satellite in order to achieve intelligent and unmanned mining. Another intelligent mining program covering 28 topics—including the real-time process control of mining, real-time management of resources, construction of a mine information network, and application of new technology and automatic control—was carried out in Finland. Sweden has developed the Grountecknik 2000 strategic plan for mine automation [5], [6], [7], and veteran mining equipment companies such as Atlas Copco are actively developing a series of unmanned underground gold mining equipment and related control systems that can be used to implement the strategic plan. One of the most famous institutes in unmanned vehicles, the Commonwealth Scientific and Industrial Research Organization of Australia, is making great efforts to achieve the intelligent mining of underground mines, with a particular focus on the unmanned control of various types of equipment [8].

    Although these developed countries have already invested a considerable amount of time and money into the study of intelligent mining, only a few related studies have been carried out in China, especially in the field of intelligent equipment and platforms. In order to rapidly advance its intelligent mining capabilities, China is supporting many intelligent mining projects, including the Key Technology and Software Development for Digital Mining project and the High-Precision Positioning for Underground Unmanned Mining Equipment and Intelligent Unmanned Scraper Model Research project. In particular, a project titled Intelligent Mining Technology for Underground Metal Mines was established during the 12th Five-Year Plan, in order to promote intelligent mining technology to a certain extent. This article introduces several research achievements and their applications in this project. Trackless mining equipment such as rock-drilling jumbos, down-the-hole (DTH) drills, underground scrapers, underground mining trucks, and underground charging vehicles have been developed using intelligent technologies. Suitable communication techniques, sensors, artificial intelligence, virtual reality, information technology, and computer technology for mining equipment and platforms have been implemented. The experimental results indicate that some of the system’s functionalities are innovative and show good performance.

    2. Intelligent mining

    Mining is one of the oldest industries in the world. environmental protection equipment techniques have passed through a rapid change from artificial production, mechanized production, and on-site remote-control production, to intelligent and fully automated production. In order to move the mining industry forward, mechanization tools have been developed, single-equipment and independent systems have been automated, and the entire mining production process has been highly automated [9]. By integrating information technology with the industrialization of mining technology, intelligent mining technology has been rapidly developed, based on mechanized and automated mining, as shown in Fig. 1. This has resulted in the gradual upgrading of intelligent processes in mining equipment; unmanned and centralized mining equipment have now entered the stage of practical application, which will significantly advance the automation and information technology used in mining [10].

    Integrated communication, sensors, artificial intelligence, virtual reality, information technologies, computer technologies, and unmanned control equipment were combined in order to achieve intelligent mining technologies, as shown in Fig. 2. Such technologies are based on precise, reliable, and accurate decision-making and production process management through real-time monitoring; they allow mine production to be maintained at the optimum level, and lead to improved mining efficiency and economic benefits. In this way, green, safe, and efficient mining can be achieved.

    Taking a typical trackless mining technology as an example, intelligent mining technology can be divided into three layers—the control layer, transport layer, and executive layer [11].

    As shown in Fig. 3, the executive layer mainly consists of trackless mining equipment such as rock-drilling jumbos, DTH drills, underground scrapers, underground mining trucks, or underground charging vehicles. The transport layer mainly includes a ubiquitous information-acquisition system, wireless communication system, and precise positioning and intelligent navigation system. The control layer is designed as a system-level platform, and is responsible for intelligent mining process scheduling and control. This is the core of the entire system, because all intelligent mining-related functions and control ideas are implemented through this platform. First, a reasonable gold and diamond mining equipment plan is designed by analyzing the reserves of mine resources and geological conditions in combination with the underground production schedule. Next, an intelligent scheduling and control platform is developed. Control instructions for the equipment are sent through the transport layer to a specific piece of equipment in order to perform a mining task at a specific position and time. Within the executive layer, the control layer collects current information on the tunnel and basic information about the vehicle in real time; this information can be used to determine the location of the equipment or adjust it at any time until that entire stage of the mining plan is successfully completed.

    Intelligent trackless mining technology is based on intelligent unmanned equipment at the executive layer, such as rock-drilling jumbos, DTH drills, underground scrapers, underground mining trucks, or underground charging vehicles. The functions of intelligent and unmanned diamond mining equipment differ according to the different tasks each piece of equipment must carry out.

    3.1. Intelligent rock-drilling jumbo

    Rock drilling is the key process in mining, and plays a very important role in productivity, cost, and efficiency. Different geological conditions require different mining methods, and different methods require different types of rock drilling. A hydraulic rock-drilling jumbo is needed for medium-length hole drilling (i.e., depth of 20–30?m, diameter of 60–100?mm) [12]. An intelligent and unmanned rock-drilling jumbo has been designed to support intelligent mining technology and efficiently complete drilling work.

    Remote control and a virtual-reality display were the first basic technologies implemented in the unmanned hydraulic rock-drilling jumbo. Fig. 4 shows the initial unmanned control platform for the jumbo on the surface. The virtual prototype display system, including on-site audio and video signals, is well-integrated in order to increase the feeling of immersion while performing remote-control operations.

    Furthermore, the rock-drilling jumbo is autonomously controlled and operated in the tunnel under the guidance of a positioning and navigation system. By coordinating the positioning system and altitude control system, the jumbo can achieve autonomous driving to the location from the dispatch layer. This is a major step toward achieving continuous operation without interference. Given the coordinates of the drilling-hole position in the three-dimensional (3D) digital map of the mine, the identification of the stope top and floor and the accurate positioning of the rock-drilling system can be achieved independently. This provides a basis for unmanned operation. The intelligent control flow diagram is shown in Fig. 5.

    The rock-drilling parameters are independently adjusted according to the rock conditions. The intelligent rock-drilling jumbo (shown in Fig. 6) is equipped with components for intelligent blockage prevention, rock-characteristic acquisition, and frequency matching; an automatic rod function; and a fully automatic drill-pipe bank. The hole-blasting parameters are specified independently, according to the scheduling system that is used, in order to ensure continuous drilling.

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  Desiccant or compressor dehumidifier?
Posted by: lainmica - 16-09-2021, 10:23 AM - Forum: Fixture Library Requests - No Replies

Desiccant or compressor dehumidifier?

    DESICCANT DEHUMIDIFIERS

    While a compressor dehumidifier has a compressor and a cold surface that it utilizes to yank the moisture from the damp air, the desiccant dehumidifier works more like a sponge or silica gel, simply absorbing the moisture from the humid air via a desiccant wheel. The wheel is regenerated by an inbuilt internal heater that allows the process to go on and on.

    The desiccant dehumidifiers are generally quieter and more compact in design and are thus preferred by many customers. Below are some of the pros and cons of using a desiccant dehumidifier.

    ADVANTAGES OF DESICCANT DEHUMIDIFIERS

    They work well in both cold and warm climates: Unlike the compressor dehumidifiers that are really built for a warm ambient temperature, the moisture absorber boxes will maintain a superior standard of performance in both warm and cold ambient temperatures. This is because while the compressor dehumidifiers work on a condensation principle that requires a temperature gradient between the atmosphere and a condensation surface, the desiccant dehumidifiers utilize an adsorption principle where the water molecules adhere onto a surface to form a thin film of moisture on the dehumidifier material. This makes them highly effective as dehumidifiers in spaces with high humidity at low temperatures. As a result, with the moisture absorber refill, you do not have to grapple with the 15°C cut-off room temperature for optimal performance that is required for the compressor dehumidifiers.

    Little packets of silica gel are found in all sorts of products because silica gel is a desiccant -- it adsorbs and holds water vapor. In leather products and foods like pepperoni, the lack of moisture can limit the growth of mold and reduce spoilage. In electronics, it prevents condensation, which might damage the electronics. If a bottle of vitamins contained any moisture vapor and were cooled rapidly, the condensing moisture would ruin the pills. You will find little silica gel packets in anything that would be affected by excess moisture or condensation.

    Silica gel desiccant canister is nearly harmless, which is why you find it in food products. Silica, or silicon dioxide (SiO2), is the same material found in quartz. The gel form contains millions of tiny pores that can adsorb and hold moisture. Silica gel is essentially porous sand.

    Silica gel can adsorb about 40 percent of its weight in moisture and can take the relative humidity in a closed container down to about 40 percent. Once saturated, you can drive the moisture off and reuse silica gel by heating it above 300 degrees F (150 C).

    Refrigerator deodorizers help to reduce bacteria growth and therefore reduce smells and extend the life of food. Adding more toxins to your fridge will only create an additional growth area, so opt for deodorizers made of non-toxic ingredients.

    Look at the lifespan of your deodorizer. If you are someone who is good at remembering when it is time to change out your deodorizer, one with a shorter lifespan could work for you. If you are often away from home for extended periods or need something for your rental property, choose a deodorizer that does not need to be frequently changed.

    Air purifying bags, as their name suggests, are bags that purify the air. The bag contains activated minerals such as bamboo charcoal to filter the air in its space. It does this by absorbing the chemicals, toxins, and odor and it gives off a fresh scent. However, a bamboo charcoal air purifying bag does not work like aerosol sprays that make the air smell good. In fact, it does not even give off a distinct smell. If your room smells better after you placed the air purifying bag, then that is the smell of clean air.

    All products can benefit from adding the packets to your production system. Whether storing or shipping, Silica-Gel Desiccant Packets are an affordable and efficient way to guarantee longer life for products.  The benefits of silica gel desiccant packets go beyond protecting the product during transport to your customers. Customers can continue to use the silica gel desiccant packets for personal use.  Here are some examples of reusing silica gel desiccant packets.

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  a brief history of blood collection systems and devices
Posted by: lainmica - 16-09-2021, 10:20 AM - Forum: Fixture Library Requests - No Replies

a brief history of blood collection systems and devices

    Before the modern vacuum tube, blood collection tubes and other devices were difficult and imprecise. Etched lines in borosilicate glass tubes reflected the amount of blood the phlebotomist needed to collect.

    Using a disposable venous blood collection needle, the phlebotomist would puncture a vein and direct the blood into the glass tube that contained ETDA or citrate as additives to prevent blood coagulation. Black rubber stoppers were used to seal the tubes for transportation to the laboratory.

    Sanitation was also an issue because tubes and syringes were washed between patients. A grinding wheel was used to resharpen multi-sample pen type needles, and they were sterilized between uses.

    Ensured that additives were used in the correct proportion for the amount of blood collected. The vacuum tubes used in venipuncture made blood draws safer and easier, and their results more accurate. Regulatory agencies such as the FDA, ISO, and CLSI now enforce guidelines that ensure that blood collection systems are consistent in both design and manufacture.

    Has been an advancement in collecting blood using disposable non-vacuum blood collection tubes, ushering microsampling into the mainstream. With DBS sampling, a small prick of blood is dropped onto an absorbent card made of filter paper. After the card absorbs the blood and dries sufficiently, it can be transported much more easily than glass tubes filled with blood samples. The innovation of DBS cards means that a very tiny sample of blood can provide accurate test results, a boon for patients and technical staff alike.

    In all settings in which specimens are collected and prepared for testing, laboratory and health care personnel should follow current recommended sterile techniques, including precautions regarding the use of needles and other sterile equipment.  Treat all biological material as material that is potentially hazardous as well as contaminated virus specimen collection tube supplies. For all those who are involved in specimen collection and preparation, the responsibility to adhere to current recommendations designed to maintain the safety of both patients and health care workers does not end when the patient is dismissed.

    Although most approved saliva collection methods use specialized tubes and buffers to stabilize RNA and viral inactivation, researchers have found that this expensive method may not always be needed. Our disposable saliva collection kit is designed to provide a widely available, cost-effective solution for raw saliva collection to simplify saliva-based detection, which is essential for epidemiological research on a global scale. The easy-to-use self-collection kit helps clean saliva transfer, reduces the risk of cross-contamination when paired with liquid handling procedures, and is seamlessly integrated into the downstream automated workflows of viral RNA extraction and direct PCR for high-throughput monitoring and testing.

    The Ministry of Health has recently approved the use of do-it-yourself, self-test COVID-19 antigen rapid test kit (colloidal gold) that can be purchased at pharmacies. Designed to be self-administered, these tests will allow more frequent testing for greater peace of mind, should individuals wish to be tested more often. Anyone who tests positive using a self-test kit should immediately approach a SASH clinic for a confirmatory test, and self-isolate while awaiting results.

    Wearing a disposable face mask in public places has become the norm in most countries, as the world continues fighting to keep the Covid-19 pandemic at bay.

    Experts now estimate that each month, 129 billion face masks and 65 billion gloves are used and disposed of globally. With a surgical mask weighing roughly 3.5g, that would equate to 451,500 tonnes of masks a month and, when placed next to one another, cover an area roughly three times the size of Singapore.

    Conservationists and non-governmental organisations are increasingly concerned that a lot of the plastic waste, especially pandemic-related waste, is ending up in landfills, waterways and oceans, adding to the millions of tonnes of plastic waste already dumped into the world's oceans every year.

    We are engaged in the development, production and supply of disposable infusion sets used in insulin infusion therapy, including the popular flexible cannula devices currently used with insulin pumps.

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  JBsystems the winner 2 fixture
Posted by: jenserns - 13-09-2021, 04:14 AM - Forum: Fixture Library Requests - No Replies

Hi 

can add these fixture to the libary. 
i use them alle the time in shows.

link to manufacturer here

winner 2

Ps.

File for fixture is to big.
se link for pdf file on fixture.

I have used adjdmx controller and software.

are now using artnet  mk2 and these software. 
Hope these will be as good.

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  ADJ DP-415R
Posted by: DDLucy - 12-09-2021, 11:59 AM - Forum: Fixture Library Requests - No Replies

Product page - https://www.adj.com/dp-415r
Manual - https://cdb.s3.amazonaws.com/ItemRelated...p-415r.pdf
[Image: ZNprsId.png]

I hope I did this right. Thank you

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  Showtec LED Octostrip MKII
Posted by: Wimar - 08-09-2021, 05:56 PM - Forum: Fixture Library Requests - No Replies

Hi, I have a request for adding fixtures:

-Showtec LED Octostrip MKII 100cm
-Showtec LED Octostrip MKII 50cm

Manufacturer: https://www.highlite.com/nl/search/?q=oc...%3AActueel

Please find manuals available for download on the product page, many thanks!

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  Basics of acid dyes, disperse dyes, and reactive dyes.
Posted by: getopica - 06-09-2021, 10:19 AM - Forum: Fixture Library Requests - No Replies

Basics of acid dyes, disperse dyes, and reactive dyes.

    Acid dyes with improved light fastness have become important particularly in connection with the usage of acid dyes in information recording systems. The inferior light fastness may be due to several reasons. Auto oxidation reaction of dyes is generally considered to occur on exposure to ultraviolet (UV) radiation and prevented by the addition of UV absorbers or antioxidants such as hindered phenols or naphthylamines. In recent years as an approach to the photostabilisation of dyes attempts have been made to prepare dyes with built-in photostabilising moiety.

    Acid dyes, named for their application under acid conditions, are reasonably easy to apply, have a wide range of colours and, depending on dye selection, can have good colour fastness properties. The dyes are divided into three categories according to their levelling and fastness properties, namely levelling, milling and super milling dyes.

    Levelling, or equalising, acid dyes have good levelling properties and are applied from a bath containing sulphuric acid to achieve exhaustion. Because of the ease of migration of dye molecules into and out of the fibre, equalising acid dyes have poor fastness to washing, and are normally used for pale, bright shades where fastness is not paramount.

    Milling acid dyes have a greater substantivity for the fibre than levelling dyes, and therefore have poorer levelling properties. These dyes have better fastness properties than levelling acid dyes, and have reasonable wet fastness, particularly if alkaline milling is to take place in a subsequent process.

    Super milling acid, or neutral dyeing, dyes are applied in a similar way to milling acid dyes, except that greater control over the strike rate of the dye is exercised. Super milling dyes give very good fastness and, with an appropriate after-treatment, can satisfy requirements for shades of medium depth, especially where reasonable brightness is needed.

    Thus there are considerablef differences in the properties and application methods within the whole range of acid dyes. The dyer must take care to ensure that the dyes chosen in combination are from the same group and have very similar properties.

    Disperse dyes are characterised by the absence of solubilising groups and low molecular weight. From a chemical point of view more than 50% of disperse dyes are simple azo compounds, about 25% are anthraquinones and the rest are methine, nitro or naphthoquinone dyes. Disperse dyes are used mainly for polyester, but also for cellulose acetate and triacetate, polyamide and acrylic fibres. Disperse dyes are supplied as powder and liquid products. Powder dyes contain 40–60% of dispersing agents, while in liquid formulations the content of these substances is in the range of 10–30%. Formaldehyde condensation products and lignin sulphonates are widely used for this purpose. The following chemicals and auxiliaries are used for dyeing with disperse dyes;

  Dispersants: although all disperse dyes already have a high content of dispersants, they are further added to the dyeing liquor and in the final washing step.

    Carriers: for polyester fibre, dyeing with disperse dyes at temperatures up to 100°C requires the use of carriers. Because of environmental problems associated with the use of carriers, polyester is preferably dyed under pressure at temperature >100°C without carriers. However, carrier dyeing is still important for polyester-wool blends.

    Thickeners: polyacrylates or alginates are usually added to the dye liquor in padding processes.

    Reducing agents (mainly sodium hydrosulphite) are added in solution with alkali in the final washing step for the removal of unfixed surface dye.

    Owing to their low water solubility, disperse dyes are largely eliminated by adsorption on activated sludge in waste water treatment plants. Some disperse dyes contain organic halogen, but they are not expected to be found in the effluent after waste water treatment because of their adsorption on activated sludge.

    Reactive dye introduced on 1956 and for the first time dyeing became possible by direct chemical linkage between dye and fiber (Shenai, 1993). But all classes of reactive dye do not react in the same manner. So the group of dyes used for a ternary shade should have compatibility among themselves. Importantly, reactive dyes in a mixture should all exhaust and react with the fiber at about the same rate so that the shade builds up accurately. Dyes which are from different ranges, with different reactive groups, should not be used together because of their different dyeing character and reactivity.

    Compatible dyeing performance requires careful control of the dyeing parameters such as temperature, salt and alkali concentrations, the dyeing time and the liquor ratio. There is often a doubt about the particular reactive group presents in a reactive dye. For that reason in most of the cases selection of dyes depends on the maker’s recommendations (Broadbent, 2001).

    Shenai (1997) discussed in detail about the chemistry of vinyl sulphone dyes like Remazol class. Common salt and alkali plays the vital role in exhaustion and fixation of these dyes and addition of salt to the dye bath before adding the alkali is also essential. In reactive dyeing, though water is the competitor for reaction with the dye, cellulose fiber takes part in the reaction in majority. Because the substantivity of reactive dye to the fiber is greater than that to water (Chinta and Vijaykumar 2013).

    But factually all the reactive dyes do not have the same range of substantivity and reactivity, and intermediates are usually used. Reactivity is compulsory for these dyes but higher reactivity of a dye can spoil the dyeing due to hydrolysis. So the compatibility of the dyes used for ternary shades should be analyzed carefully to make the maximum utilization of each dyestuff especially when the reactive groups in them are different.

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  What is injection molding?
Posted by: getopica - 06-09-2021, 10:17 AM - Forum: Fixture Library Requests - No Replies

What is injection molding?

    Precision injection molding of high performance components requires primary error sources affected the molded component to be identified and isolated such that these errors can be reduced if needed. To systematically isolate and quantify the contribution of misalignment, thermal variation and component warpage to the accumulated error observed on the component, a methodology is presented and tested around an existing mold which produced parts with high dimensional variability. The mold featured two concentric guide pillars on opposite sides of the parting plane and rectangular centering block elements at three locations. Mold displacements at the parting plane were measured through the incorporation of three eddy-current linear displacement sensors. Thermal error sensitivity was investigated using FEM simulations such that the induced variability from thermal expansion and filling phase was identified and quantified. Finally, molded component warpage was isolated and quantified, again by the means of FEM simulation. The results were confirmed by using the mold on two injection molding machines to produce an array of parts whose key dimensions were measured.

    Micro/nanostructured components play an important role in micro-optics and optical engineering, tribology and surface engineering, and biological and biomedical engineering, among other fields. Precision glass molding technology is the most efficient method of manufacturing micro/nanostructured glass components, the premise of which is meld manufacturing with complementary micro/nanostructures. Numerous mold manufacturing methods have been developed to fabricate extremely small and high-quality micro/nanostructures to satisfy the demands of functional micro/nanostructured glass components for various applications. Moreover, the service performance of the mold should also be carefully considered. This paper reviews a variety of technologies for manufacturing micro/nanostructured molds. The authors begin with an introduction of the extreme requirements of mold materials. The following section provides a detailed survey of the existing micro/nanostructured automotive mold components manufacturing techniques and their corresponding mold materials, including fixtures and mechanical parts methods. This paper concludes with a detailed discussion of the authors recent research on nickel-phosphorus (Ni-P) mold manufacturing and its service performance.

    What is injection molding?

    Injection molding is a manufacturing process which is commonly used to create plastic components.

    Its ability to produce thousands of complex parts quickly makes it the perfect process for the mass production of plastic components. Essentially, the process involves the injection of plastic at high speed and pressure into a precision mechanical gear parts, which is clamped under pressure and cooled to form the final part.

    By melting thermoplastic and injecting it into an aluminium mold at high speed and pressure, manufacturers can create multiple complex parts at once. When the parameters of the process are controlled correctly, there’s also little need for finishing and processing the manufactured part, making it more cost effective and efficient.

    Although it’s one of the oldest manufacturing processes around, its speed and cost-efficiency is what continues to make it a popular choice with worldwide manufacturers. Today’s injection molding machines are fast, accurate and produce consistently high-quality components at scale.

    How does injection molding work?

    Although the process may seem simple, there are many elements involved which can alter and ruin the overall quality of the plastic component produced. In order to make a high-quality part, experienced manufacturers select the right thermoplastic (the material used to create the part), connector mold parts (which shapes the part), temperature and injection pressures to ensure the final part meets customer requirements.

    Before we talk about the specific parameters that need to be controlled within the process, how does injection molding actually work?

    Step 1: Feeding and heating the plastic

    To start, a thermoplastic or combination of thermoplastics are fed into an injection molding machine. The plastics, which turn to liquid when heated, are fed into the hopper at the top of the machine in solid pellet form.

    The pellets pass through the machine and into a temperature-controlled cylinder called the machine barrel. Here, the plastic pellets are heated until the thermoplastic is molten.

    The temperature of the barrel and the plastic needs to be carefully monitored to make sure the thermoplastic doesn’t overheat and burn or scorch the final part.

    Step 2: Pre-injection process

    Before the molten plastic is injected, the tool, which is usually made up of a fixed half called the cavity and a moving half called the core, closes.

    When closed, a clamp applies pressure to the tool, ready for the injection of the plastic.

    The screw within the barrel of the machine also screws back to its set point so the plastic can enter the barrel, ready to be injected.

    Step 3: Plastic injection

    Once the clamp pressure is at an optimum level, the plastic is injected by the screw at high speed and pressure into the cavity. A gate inside the tool helps to control the flow of the plastic.

    To make sure no damage is done to the final components, it’s important that the manufacturer monitors the injection pressure of the plastic and that they have the expertise to maintain and use the molds and tools correctly.

    This ensures they are creating high-quality and consistent parts from their injection molding process, like packaging mold components.

    Step 4: Forming the part

    When the tool cavity is mostly full of liquid, a holding phase begins. This is where the part in held under high pressure so it can start to take its final form.

    After a set holding time, the screw will screw back to its set point. This happens at the same time as the cooling phase of the cycle, which allows the thermoplastic to set in its final form.

    Once the set cooling time has passed, the mold opens and ejector pins or plates push the new part out of the tool, and there are also custom mold components. These fall on to a conveyor belt ready to be finished and packed.

    Step 5: Part finishing

    Depending on the final application of the part, the molded component may require some finishing, including dyeing, polishing, or removing of excess material.

    These processes are unique to each part and are completed before they’re packed and distributed to customers.

    By picking and checking products by hand, as well as performing regular quality checks, experienced manufacturers can make sure they’re producing consistent, high-quality parts for their customers.

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  Suggestions
Posted by: hellishvictor - 05-09-2021, 10:43 PM - Forum: General Topics - Replies (1)

· When the cursor hover over the MIDI learn button, it display the text "Press and Hold your cursor on a fader / control...", which can simplified with "Select a fader or control" (replacing the "/" with "or", so it don't get confused with the Control key).

· And on the "Lock" option, it display "Prevent vaders...", instead of "Prevent faders...".


Cheers.

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  EMU - Crash due to "Preference" window
Posted by: hellishvictor - 05-09-2021, 10:40 PM - Forum: General Topics - Replies (1)

Hi, after of download and install the new v21.9.3.1, there's a problem wih the "Preferences" window that causes the software to crash if the option "open at start" is enabled, or just when click on the wrench icon for open it.
And btw, it would be nice make the software open on the location of the screen set on the last session.

Cheers.

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