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text 2020-05-20 05:10
´╗┐How to reduce shrinkage in plastic mold processing

 

Therefore, various technologies have been developed to minimize shrinkage and improve product quality. Shrinkage is a stubborn disease. Premature cooling at the gate reduces the fill time in the cavity, which increases the chance of shrink marks. In the thicker position of the plastic mold parts of the Huangjiang, such as the ribs or protrusions, the shrinkage is more serious than the adjacent position, because the cooling rate of the thicker area is much slower than the surrounding area.How to reduce shrinkage in plastic mold processing

 

How to reduce shrinkage in plastic mold processing? Shrinkage is the enemy of plastic mold processors, especially for large-scale home appliance precision plastic mold products with high surface quality requirements. There may be one or more reasons for the formation of shrink marks, including processing methods, component geometries, material selection, and mold design. Too short a filling phase will result in increased shrinkage and eventually more or larger shrinkage marks. After the part is filled, the excess material continues to fill the cavity to compensate for the shrinkage of the material. The difference in cooling rate causes a depression at the joint surface, which is a familiar shrinkage mark. This kind of defect severely limits the design and molding of precision plastic mold products for home appliances, especially large-scale thick-walled products such as the bevel case and display case of TV sets. For example, small gates such as tubular gates cool much faster than tapered gates. In addition, the gas-assisted method is also worth a try..

 

A simple solution is to modify the conventional air cooler mould factory core hole, but this method cannot be expected to be suitable for all resins. In fact, for the demanding products such as household electrical appliances, the shrinkage marks must be eliminated, and for products such as toys that have low surface quality requirements, shrinkage marks are allowed. The geometry and material selection are usually determined by the raw material supplier and are not easily changed. Filling pressure and time significantly affect shrinkage. This method may not reduce the shrinkage marks to a satisfactory level by itself, but the molder can adjust the filling conditions to improve the shrinkage marks. Another method is to modify the mold. But moldmakers still have a lot of factors about mold design that can affect shrinkage. For molding workers, adjusting the processing conditions is one way to solve the shrinkage problem. Cooling runner design, gate type, gate size can have multiple effects

 

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text 2020-03-26 03:43
Which can effectively shorten the molding cycle and increase the injection speed

 

The classification of hot runner nozzles: can provide multiple series of gate structure forms to meet the needs of different molds or plastic parts; the heat distribution of the melt is evenly balanced; the interchangeability of the parts is good; Nozzles of different gate configurations, such as open nozzles, needle valve nozzles, automatic nozzles, and high performance nozzles. Adaptability, can process difficult molding materials and achieve the best injection molding effect. Internal stress makes the product less deformed. (2) Open nozzle: Open nozzle mainly includes point gate tip and open nozzle; open nozzle can provide larger gate size, achieve good pressure holding effect, and reduce injection molding products.. Materials are available in different types of point gate tips. Composition of the heat flow nozzle: The nozzle structure is for fitting on the outlet of the fluid supply source and generates a fluid jet distributed from the fluid supply source during use, the nozzle structure having a body, the body comprising: An actuator device for operatively flowing fluid from the fluid supply source through the nozzle structure during operation; (2) an inlet through which fluid from the fluid supply source passes during use The inlet enters the nozzle structure; (3) one or more outlet holes through which fluid is discharged from the nozzle structure during use; (4) an internal fluid flow passage that causes the inlet and the inlet One or more holes are connected; wherein the fluid flow channel further comprises an internal chamber having two or more inlet holes and an outlet port through which fluid can exit the chamber; and each inlet

 

The channels and holes are of sufficient diameter to ensure that they will not be partially or completely blocked and that they are larger than 0. (1) Point nozzle tip: Open nozzle mainly includes point gate tip and open nozzle; point nozzle is the most widely used open nozzle, which can be injection molded according to gate size and different size. Due to the different needs of different households and different characteristics of different plastics, there are many choices of nozzle specifications and models, and can also be customized and processed according to customer's special requirements.Introduction to hot runner nozzles

 

The nozzle can inject the split plastic melt into each cavity through the hot nozzle, which fully reduces the injection pressure and reduces the internal air cooler mould stress of the product and improves the product quality. (3) Needle valve type nozzle: The valve needle is controlled by pneumatic or hydraulic pressure, which can effectively shorten the molding cycle and increase the injection speed; no gate mark can effectively improve the surface quality, widely used in the processing of fine surfaces; good for injection molding materials

 

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text 2020-03-11 03:44
The following small series tells everyone what kind of conditions

 

The following small series tells everyone what kind of conditions should the injection mold processing factory have? Usually, plastic mold processing enterprises use skilled employees, tend to prefer multiple machines, ensure the operation of the resin box, multiple shifts, injection processing plants Make sure the finished project is in good running. , POM, PBT, PET, polyetheretherketone, polyphenylene sulfide, thermoplastic elastomer, TPV SBS, SEBS, TPE, TPV and most other grades of polymer.What kind of conditions should an injection mold processing factory have?

 

Plastic molds involve the use of thermoplastic materials, including many thermoplastic elastomers to produce first-class finished products. Many companies run 3 x 8 hour shifts for air cooler mould a total of 126 hours a week. Injection molding machines from most injection molding plants can handle a full range of materials and thermoplastic elastomers, including polypropylene, low density polyethylene, linear low density polyethylene, high density polyethylene, HIPS, PS, ABS, ASA, PC, PA.

 

Many machines today are automated, using conveyor belts and robotic arms, and placing them on moving belts to send to the storage box. Some materials require specialized production techniques, such as reduced temperature conditions, different release agents, high spray pressures, and custom mold design for plastic mold manufacturers, many of which are considered. The finished product is very suitable for high-volume production because it requires relatively expensive injection molds and requires a high life to ensure a return on investment

 

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text 2020-02-19 02:16
Manufacture It has a great ability

CN - EKKO is one of the leading auto rubber parts manufacturers in China. Its Air Cooler Mould suppliers goal is to supply foreign customers a complete range of auto parts, which includes bushing, engine mounting, shock absorber mounting, stabilizer link, center bearing, friction bearing. For various applications, it not only design but also manufacture auto rubber parts. With a wide range of high-standard car spare parts, people can take them to design as per their demands. 

 

As a Leading auto rubber parts manufacturer in China, it offers the high-quality auto parts with excellent performance for international market. Its goal is to satisfy the needs of customers from all around the world. Till now, it has a team with skilled professionals who research and develop new and innovative parts. EKKO realizes the new demand of the market, so all parts manufactured by EKKO can be widely utilized globally.  Its goal is to become the leader in the China manufacturing industry of auto parts. With years of experience in auto rubber manufacturing, it knows how to deal with customers' demands. Its experts work strictly according to customers' needs and requirements. Till 2011, more than 3,000 items available in its factory which are mainly suitable for Japanese/European/American cars, such as Toyota, Nissan, Mazda, Honda, Isuzu, Suzuki, Daihatsu, etc. We supply wide range items to all over the world such as America, Europe, Middle East, Africa, etc.  Our products have gained international recognition and acceptance and have been exported to more than 30 countries, like Australia, Asian, Japan, Middle East, USA, Europe, Latin America, etc. We supply our products to both domestic and oversea OEM and replacement markets. In addition to Natural, Neoprene, Nitrile, EPDM, Silicone, and SBR rubber, we also manufacture Polyurethane products for Hi-Tech Industries application.

Manufacture It has a great ability to supply high-quality auto rubber parts and best service for its customers. With its standard manufacturing process and strict testing system, it becomes one of the leading producers and exporters in China of automotive rubber parts. It offers the technical service in conformity with the international standard and the requirements from customers. Quality With the ISO quality management and testing systems, like anti-aging testing system, it has gained the quality authentication of ISO9001:2000. It is devoting to develop a new market and will try the best to become one of the leading auto rubber parts producers in the world. Presently, it mainly focused on developing international market. Source: China auto rubber parts manufacturer - EKKO, a leading auto parts manufacturer in China, offers high-quality car parts, e.g. strut mount bearing.

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text 2019-09-26 03:23
There might be a number of plastic products

There might be a number of plastic products that you usually see or use every day. Mostly these products are not only useful, but also have an aesthetic appeal. But, have you ever wondered how these products are made or how every other product has a unique shape or finish? Well, the answer for this question is Injection Molding. This process is used to mold and fabricate plastic parts and thereby a variety of plastic products are produced for immediate uses as well as industrial applications. Continue reading to know more about Injection Molding Of Plastic.

The Process Of Plastic Injection Molding:Injection molding process is very short and requires approximately two seconds to two minutes. The stages are as follows:ClampingBefore injecting the material into the mold, the two halves of the mold are first closed securely using a clamping unit. The two halves of the mold are attached to the injection molding machine. Then, one half of the mold is allowed to slide. After this, the clamping unit that is hydraulically powered pushes the mold halves together and exerts force so as to keep the mold close together while the material is injected inside. Machines with greater clamping forces will require more time. InjectionAfter this, raw plastic which is usually in the form of pellets is fed into the injection molding machine. The material gets melted by heat and pressure within. Thereafter, the molten plastic is injected into the mold very fast and the high pressure within the mold packs the molten plastic inside. The quantity of material that is injected into the mold is referred to as a shot. CoolingAfter injection in the mold, the molten plastic has to be cooled in the next stage.

Thereupon, the solidification of the molten plastic starts and it gets solidified into the desired shape. Shrinkage of some part of molten plastic is obvious to take place during the cooling process. Mold cannot be opened till the cooling time has elapsed. EjectionAfter cooling, the cooled part is ejected from the mold using the ejection system. This ejection system is attached to the rear part of the mold. Force has to be applied to eject the part from the mold since the part shrinks and adheres to the mold during the cooling process. A mold release agent can also be sprayed onto the mold cavity prior to injecting the molten plastic to facilitate the ease of ejection. After the material has been ejected, the mold is clamped shut for the next shot. RSP Inc. is a China-based company that can be approached for Plastic Injection molded products. It is ranked amongst the topmost Plastic Molding Manufacturers in China. It offers High Quality Low Cost Custom Plastic Tooling, Injection Molded Plastic and Custom Plastic Injection Molding. The company has over fifty years of experience. For more information, log on to Air Cooler Mould suppliers

 

 

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