Tag - Guangdong 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 […]

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 […]

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 […]

Detailed Explanation of Injection Molding Process for PP Plastics

“Plastic properties are the basis of injection molding technology”. Mastering the technological properties and characteristics of various plastics is a basic professional knowledge that every injection molding worker must know. The performance of plastics is the basis for setting “injection molding process conditions”. It is also the reason that must be considered when analyzing the quality problems and abnormal phenomena in the process of injection molding. One of the elements.
 
PP, commonly known as polypropylene, is also known as “100 […]

Common Used Material Property of Injection Molded Part

PC: PC is the abbreviation of polycarbonate, with excellent electrical insulation, elongation, dimensional stability and chemical corrosion resistance, high strength, heat resistance and cold resistance, but also has self-extinguishing, flame retardant, non-toxic, coloring and other advantages.

Applications: Broad-wave transparent optical instruments; flame-retardant and environmentally friendly telecommunications appliances; surface metallized automotive parts; food containers with low residual harmful substances; anti-cracking and embrittlement medical devices
 
ABS: (ABS resin) (acrylonitrile-styrene-butadiene copolymer), good rigidity, high impact strength, heat resistance, low temperature resistance, chemical resistance, mechanical […]

Injection Molding Design – Summary of Requirements on Mold Design Process

The mold design is different from product design, because it is a process design itself. The basic requirements for mold design are: 

The mold shall be able to complete the process of parts processing.

 

The equipment on which the mold is used shall be specified; and the technical parameters of the equipment shall be complied with.

 
 

The parts molded during the validity period of the mold shall have the dimension tolerance within the allowed range of parts drawings.

 

For prototype mold, the mold […]

Sharing Specific Mold Processing Methods

(1) Determine the type of mold.
Such as pressing die (open, semi closed, closed), casting die, injection mold, etc.
mold making
(2) Determine the main structure of mold type.
The ideal die structure is to determine the necessary molding equipment, the ideal cavity number, under absolutely reliable conditions can make the mold itself work to meet the technical and economic requirements of the plastic parts. The technical requirements for plastic parts are to ensure the geometry, surface finish and dimensional accuracy of plastic […]