Tag - Benefits of Plastic Injection Molding

How to View the Development of Domestic Mold Industry?

The rapid development of equipment manufacturing industry, especially the rapid growth of automotive and electronic products, has created a good market environment for the development of mold industry. Although the statistical data have not yet come out, but according to the analysis of the development situation of the two booming production and demand, the development speed of the mold industry is higher than last year. But there are also worries in the gratifying development.
 
One is the lack of mold […]

Why Injection Mold Need to Be Tested?

Most of the defects of injection molded parts are caused by the plasticization and injection stage of injection molded parts, but sometimes unreasonable design. The influencing factors include the type of injection inlet, the number of mold cavities, position and size, the design of cold/hot runner system and the structure of the product itself. Therefore, in order to avoid the product defects caused by mold design, we need to analyze the injection mold during the production.
mold making
After getting the […]

How to Adjust Injection Molding Process Parameters

The measurement and control of temperature is very important in injection molding. Although these measurements are relatively simple, most injection moulding machines do not have sufficient temperature pick-up points or circuits. In most injection molding machines, the temperature is induced by thermocouples. A thermocouple is basically made up of two ends of different wires. If one end is hot than the other, it will produce a tiny telegram; the more heated it is, the stronger the signal.
 
Temperature control
 
Thermocouples are […]

Common Problems in Transparent Plastic Injection Molding Process

Transparent plastics, because of their high transmittance, are bound to require strict surface quality of plastic products, and can not have any defects such as markings, pores, whitening, fog halo, black spots, discoloration, poor gloss, etc. Therefore, in the entire injection molding process, the design of raw materials, equipment, molds, and even products should be paid great attention to and put forward strict. To special requirements. Secondly, transparent plastics are mostly of high melting point and poor fluidity, so […]

Basic Requirements for Injection Molding Operators

First inspection and self inspection in injection molding production

 
1) Before production, the operator must submit the first mold product to the inspector for self-inspection and then to the inspector for first inspection. Only after the inspector notifies that it is qualified, can the mass production be carried out. The first mold sample should be left on the injection molding machine for self-inspection in production.
 
2) If the products in production do not meet the quality requirements, the monitor should be […]

Effect of Five Systems of Injection Molding Machine

Injection system

 
Injection system is one of the main components of injection molding machine, generally there are three main methods: plunger, screw, screw pre-plastic plunger injection. Now widely used is screw type. The effect is that in a cycle of the injection machine, a certain amount of plastic can be heated and plasticized within a specified time, and the molten plastic can be injected into the mold cavity through a screw under a certain pressure and speed. After the injection, […]

Brief Introduction of Injection Molding Process

The injection molding process includes preparation before molding, injection process and post-processing of plastic parts.
 
Preparations before molding include the inspection of raw material appearance and the determination of technological properties, preheating and drying, cleaning of injection machine barrel, preheating of inserts and selection of release agent when demoulding is difficult. Sometimes it is necessary to preheat the mold.
 
During molding, powdered or granular materials are fed from the hopper into the high-temperature barrel for melting and plasticizing to become viscous […]

Influence of Injection Molding Process Conditions on Plastic Products

Plastic material
 
The complexity of the properties of plastic materials determines the complexity of the injection molding process. And the performance of plastic materials varies greatly because of different varieties, brands, manufacturers, and even batches. Different performance parameters may lead to completely different molding results.
 
Injection temperature
 
The melt flows into the cooling cavity, dissipating heat due to heat conduction. At the same time, the heat generated by shearing may lose more or less heat than heat conduction, depending mainly on the […]

Causes and Solutions of Deformation of Injection Molded Parts

The possible reasons for the deformation of injection molded parts are:
 

bending is due to excessive internal stress in injection molded parts.

 

mold filling speed is slow.

 

plastic material in cavity is not enough.

 

plastic temperature is too low or inconsistent.

 

injection molded parts are too hot at the time of ejection.

 

the temperature of cooling is insufficient or the temperature of the moving and fixed die is inconsistent.

 

the structure of injection molded parts is unreasonable (such as stiffeners are concentrated on one side, but […]

Post Processing of Plastic Injection Products

Plastic parts can not be directly put into use after molding and demoulding, and some treatment is needed. Because this treatment is carried out after molding and demoulding, it is called post-processing. It is described as follows:
 

Trimming

 
After demoulding, the plastic parts always have some excess materials, such as gate flying edge, which bring disadvantage to the appearance and use of the plastic parts, so it needs to be removed. This kind of removal is relatively simple, and can be […]