plastic injection molding knowledge - Page 3 of 41

Cold Glue Processing Method In Tpe Injection Molding Process

12/01/2023

Cold glue processing method in tpe injection molding process Stagnation is often encountered in the injection molding process and has to be understood. When the melt enters the filling mold cavity from the gate, the melt flow rate in part of the direction of the melt slows down or stagnation phenomenon. This stagnation can cause many undesirable phenomena as well as many defects. Stagnation is the highest form of melt flow imbalance. The best injection

The Causes And Solutions Of Tpe Injection Molding Overmolding Glue Can Not Stick

12/01/2023

The causes and solutions of tpe injection molding overmolding glue can not stick tpe injection molding overmolding material is usually the use of soft plastic (TPE, TPR) through secondary injection molding overmolding hard plastic (PP, PS, ABS, PA, PC, PE, etc.), the surface of hard plastic products covered with a layer of soft plastic, improve the beauty of the product, non-slip to improve grip. But in the process of wrapping often appear sticky phenomenon, how

Tpe Covered Pc Material Characteristics Molding Process And Application Knowledge

12/01/2023

TPE covered PC material characteristics molding process and application knowledge I. Concept of TPE coated PC TPE is a rubber-modified material with rubber elasticity, which can be easily molded by injection or extrusion. The rubber hardness range can be adjusted from 0 to 100 degrees in ShoreA. The hardness range of TPE for PC overmolding is 30~90 degrees, and the appearance is natural or translucent. It has excellent abrasion resistance and good bonding with PC,

The Molding Process Of Tpe Overmolding

12/01/2023

The molding process of TPE overmolding Plastic overmolding, as the name implies, is the soft rubber material overmolding to other hard plastic, commonly used overmolding materials are thermoplastic elastomer (TPE) and silicone type, TPE can be used as a soft rubber outer layer, common with the hard material is mainly plastic, but also metal and woven fabric, TPE and woven fabric shot sticky is mainly used in luggage products, the same as metal overmolding, generally

Application Range Of Hot Runner Molds

11/01/2023

Application range of hot runner molds The cold runner is the part between the mold inlet and the product gate. The plastic is kept flowing in the runner by injection pressure and its own heat. The runner is part of the molded material, but not the product. Therefore, when designing a mold, we must consider not only the filling effect, but also how to save material by shortening and narrowing the runner. Ideally, this is

Hot Runner Application Main Technology Key

11/01/2023

Hot runner application main technology key A successful hot runner mold application project requires several components to be guaranteed. Among them, there are two most important technical factors: one is the control of plastic temperature, and the other is the control of plastic flow. 1, the control of plastic temperature in the hot runner mold application of plastic temperature control is extremely important. Many production process and product quality problems arise directly from the hot

The Main Role Of Hot Runner

11/01/2023

The main role of hot runner Hot runner (HRS) is also called hot water port, that is, the cured water port into a molten water port, its composition is relatively simple, mainly including manifold, hot nozzle, temperature controller, etc.. Among them, the manifold can be divided into work-shaped, X-shaped, Y-shaped, T-shaped, mouth-shaped and other special shapes according to the shape; hot nozzle can be divided into large spout, sharp nozzle, needle valve nozzle according to

Injection Molds and Hot Runners

11/01/2023

Injection Molds and Hot Runners Injection molds are composed of several steel plates with various parts, basically divided into. A Forming device (concave die, convex die) B positioning device (guide pillar, guide sleeve) C fixture (I-plate, mold pit) D cooling system (water transport hole) E thermostatic system (heating tube, hot wire) F runner system (chirp hole, runner slot, runner hole) G Ejector system (ejector pin, ejector stick) According to the different types of casting system

How To Analyze The Machining Surface Of Injection Mold ?

11/01/2023

How to analyze the machining surface of injection mold ? The mold is composed of many parts, and its surface shapes are flat, cylindrical surface, round money surface, curved surface, thread surface, etc.. The role of each surface in the mold is different, so it needs to be carefully analyzed to determine the processing method of each surface. From the perspective of mold manufacturing process*, according to the role of parts and surfaces in the

What Are The Problems Caused By Multiple Mold Trials?

11/01/2023

What are the problems caused by multiple mold trials? 1. If the design of the injection mold is not well reviewed, the injection structure will have unreasonable points, which makes it necessary to improve the injection mold several times after the mold trial, which not only makes the cost of the injection mold exceed the budget, but also after several improvements, people will get very unsatisfactory results. This leads to the fact that the injection

How Much Does It Usually Cost To Open A Plastic Mold?

11/01/2023

How much does it usually cost to open a plastic mold? Plastic products are mass produced according to the plastic mold, how much does it cost to open a set of plastic mold, the market price varies, there are a few thousand, there are 10,000, or tens of thousands of a set. So how much is a set of plastic molds, this we are not arbitrary assessment, is in accordance with the structure of the

How To Eliminate The Color Difference Of Masterbatches During Injection Molding Production

11/01/2023

How to eliminate the color difference of masterbatches during injection molding production Color aberration is a common defect in masterbatch injection molding, and it is not uncommon to see batch scrapping of injection molding machine due to color difference of matching parts. There are many factors affecting the color difference, including the raw material resin, masterbatch, mixing of masterbatch and raw material, injection molding process, injection molding machine, mold, etc. Because of the wide range

Standards For Testing Hot Runner Systems For Plastic Moulds

11/01/2023

Standards for testing hot runner systems for plastic moulds The hot runner is heated to ensure that the plastic in the runner and gate remains molten, the hot runner system is generally composed of hot nozzles, manifolds, temperature control boxes and accessories, etc. The hot nozzles generally include two types: open hot nozzles and needle valve hot nozzles, as the form of hot nozzles directly determines the choice of hot runner system and the manufacture

Common Polishing Methods For Injection Molds

11/01/2023

The following polishing methods are commonly used for injection molds 1 Mechanical polishing Mechanical polishing is by cutting, material surface plastic deformation to remove the convex part of the polished and smooth surface polishing method, generally use oil stone, wool wheel, sandpaper, etc., mainly by hand, special parts such as the surface of the rotary body, can use the rotary table and other auxiliary tools, the surface quality requirements of high can be used to

Can The Moulds Still Be Used If They Are Rusty?

10/01/2023

Can the moulds still be used if they are rusty? Rusting is a normal phenomenon and is caused by specific reasons, not by the quality of the steel. Now we share the main reasons for mould rusting and the countermeasures to solve it. I. Reasons for mould rust (1)The gas produced by the decomposition of the melt Some raw materials will produce volatile gas after heating, these gases are more corrosive, they will produce corrosion

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