injection molding process influencing factors
In the injection molding process of plastics, thermoplastics, due to the volume change caused by crystallization, strong internal stress, large residual stress frozen in the plastic part, strong molecular orientation and other factors, so compared with thermoset plastics, the shrinkage rate is larger. The shrinkage rate is wide and the directionality is obvious. In addition, the shrinkage after molding, annealing or humidity …
Heat treatment process of plastic mold
Different types of steel are used as plastic molds, and their chemical composition and mechanical properties are different, so the manufacturing process routes are different; similarly, different types of plastic mold steels use different heat treatment processes. This section mainly introduces the manufacturing process route and the characteristics of the heat treatment process of the plastic mold. Explanation of …
How to purchase suitable china injection machine
Generally speaking, most of the customers who have been engaged in the injection molding industry for many years, have the ability to judge for themselves and choose the suitable china injection machine to produce. However, in some cases, the customer may need the manufacturer’s help in deciding which injection molding machine to use, or even the customer may just have the …
What is the principle, characteristics, application and process of injection molding by injection molding machine?
Today let us talk about the principle, characteristics, application and process of injection molding by injection molding machine. 1. The principle of injection molding. Add granular or powdered plastic into the hopper of the injection machine. The plastic is heated and melted in the injection machine to keep it flowing, and then injected into a closed mold under a certain …
There are always problems with the injection part of the injection molding machine, how to solve it
There are always problems with the injection part of the injection molding machine, how to solve it? 1. Cannot shoot glue Approach: 1) The nozzle is blocked by foreign matter. Check whether the nozzle is blocked, clean or replace the nozzle. 2) The glue nozzle is broken. Disassemble the flange to check whether the glue nozzle is broken, and replace …
how to choose injection molding machine
There are two templates on the injection molding machine, one is not moving, called the fixed template; the other can be moved, called the moving template. The mold is fixed on the two templates by screws and pressing plates respectively. When the mold is opened, the movable template of the injection molding machine moves, thereby driving the mold to open. …
Injection molding machine problems about mold
As a injection molding machine,it will face many problems about mold. What does mold EDM mean Mold EDM is EDM. Electric discharge machining is a special machining method that uses the electric erosion effect generated by the pulse discharge between the two electrodes immersed in the working fluid to abate conductive materials. It is also called electric discharge machining or …
Causes of screw wear of vertical injection molding machine
The injection system of the vertical injection molding machine is composed of a plasticizing device and a power transmission device. The injection screw plasticizing device is mainly composed of a feeding device, a barrel, a screw, and a nozzle. The power transmission device includes an injection cylinder, an injection seat moving cylinder and a screw Drive device. The injection screw …
how to choose proper mold and case of die loss
Mold selection Die Material Selection is a very important link in the whole die making process. Die Material Selection needs to meet three principles, die to meet the wear resistance, strength and toughness and other work requirements, die to meet the process requirements, and die should meet the economic applicability. The folding condition requires 1. Wear resistance. When the blank …
injection molding machine of structure:work, advantages (compared with other ones）
Injection molding is an important industrial method. It is somewhat similar to die casting, but the difference lies in the raw materials used. In die casting, the metals we use require extremely high temperatures to melt, but injection molding is mainly performed on glass, elastomers, and the most common thermoplastic and thermosetting polymers, but this technology has been widely used to make thermoplastic materials. The process is completed by heating the raw material and applying pressure at a specific temperature to inject it into the mold cavity without any change in its chemical composition.
How to divide the mold accuracy level
1. Moulds refer to precision forming tools used for batch forming, stamping and other products. The accuracy of the mold includes the accuracy of the parts obtained in processing and the production time guarantee It can prove the quality awareness of product accuracy, but the mold accuracy usually refers to the accuracy of mold working parts. â‘ . The concept of …
Why use baked plastic raw materials?
Why use baked plastic raw materials? ABS, PC, PA6 types of plastic raw materials need to be baked, but PP, TPO, POM types do not need to be baked? In the injection molding process, the moisture content of the material must be in a relatively low range to ensure the normal injection molding and the normal physical properties of the …
