Tag - plastic molding process

How to Do a Good Job of Injection Molding Process?

The process of injection molding mainly includes four stages: filling, holding, cooling and demolding. These four stages directly determine the quality of the product. It is a complete continuous process. Injection parameters
 
Injection parameters

Injection pressure

 
Injection pressure is provided by the hydraulic system of the injection system. There are many factors affecting the filling pressure of melt, which can be summarized into three categories: (1) material factors, such as the type and viscosity of plastics; (2) structural factors, such as the […]

What are Common Plastic Parts for Automobiles?

Common automotive plastic parts are: dashboard body skeleton, battery bracket, front-end module, control box, seat support frame, spare placenta, fender, chassis cover, noise partition, rear door frame, etc. Most of the panels of automobile plastic parts are made of engineering plastic ABS or abs/pc.

 
Generally, doors, dashboards, bumpers and gearboards are all made of PP. Engine hood is made of lead with pp. PC / ABS is usually purchased from material manufacturers. Plastic parts are light in weight, and have […]

Three Types of Plastic moulds, Which One Is More Cost-Effective?

Plastic moulds can be divided into three categories, each of which has its advantages and disadvantages. Which of these three types of plastic moulds is more cost-effective?

(1) Large nozzle mould: Runner and gate are demoulded together with the product on the parting line. The design is the simplest, easy to process, and the cost is low. Therefore, more people use large nozzle system to operate.
 
(2) Fine nozzle mould: the runner and gate are not on the parting line, generally […]

Three Principles of Mold Material Selection

(1) Mold meets working conditions
 

Wear resistance

 
When the billet is plastic denatured in the cavity, it flows and slides along the surface of the cavity, resulting in severe friction between the surface of the cavity and the billet, which leads to the failure of the mold due to wear. So the wear resistance of materials is one of the most basic and important properties of dies.
 
Hardness is the main factor affecting wear resistance. Generally speaking, the higher the hardness of mold parts, […]

Analysis of Common Failure of Plastic Mould

Plastic mould is for plastic processing and forming. They are made of 45 steel, P20, 718 and other plastic mould steels. The failure analysis of plastic mould can better guide the research and development of mould steel. The failure modes of plastic mould are as follows:

Abrasion and Corrosion of Cavity Surface

 
1) Plastic melt flows in the cavity with a certain pressure, and solidified plastic parts come out of the mould, which will cause friction and wear on the surface of the […]

Questions and Answers on Mould Manufacturing Technology

There are many problems to be paid attention to in mould manufacturing. If you don’t know its process and key points, you should learn more about the following knowledge.
 
1) What is the most important and decisive factor in choosing die steel for mold manufacturing?
mold making
Forming method – can be selected from two basic material types.
 

A) Hot working tool steel, which can withstand relatively high temperatures during die casting, forging and extrusion.

 

B) Cold working tool steel, which is used for blanking and […]

Six Points of Preparation for Mold Assembly

Familiarity with assembly procedure

 
The assembly procedure of injection mold is not only the process document of the assembly process and operation method of the mold, but also the technical document guiding the assembly work of the mold. It is also the basis for the assembly production plan and technical preparation. Therefore, before assembling, workers must read the assembly process regulations carefully, understand and master the whole process of assembling the mold.
 

A thorough understanding of assembly drawings

 
Assembly drawing is the […]

Harmful Effects of Improper Heat Treatment Process of Plastic mold

 
In the process of plastic mold processing, cracks or deformation, easy oxidation and decarbonization of the surface are mainly due to the failure of the mold. The main reason for the failure of plastic mold is the improper heat treatment process, such as the improper selection of heat treatment process parameters such as heating temperature, holding time, cooling speed and so on.

First of all, it is about the influence of oxidation and decarbonization, mainly because die quenching is stopped […]

5 Factors Reflecting Technical Level of Mold Factory

The level of mold technology ultimately manifests itself in many aspects, such as mold manufacturing cycle, mold service life, mold accuracy and stiffness, mold manufacturing cost, mold standardization and so on. These are also the basis for evaluating the economic and technical indicators of molds.

Mold manufacturing cycle

 
 
The mold manufacturing cycle reflects the production technology level and organization management level of the mold enterprises. When making the mold, we should try to shorten the manufacturing cycle of the mold. At present, in order to shorten the […]

Common Defects in Plastic Injection Mold

As we all know, some defects often occur in injection molds after forming, which seriously affects the normal use of the workpiece, and even leads to the unusable workpiece, which will seriously affect the cost and efficiency of the manufacturing workpiece. Therefore, we must do a good job of preparation before moulding, and find out the specific causes of these defects.

Lack of glue.

 
(1) If one of the multi-mode cavities lacks glue, it may be due to the different size […]