Injection Molding Machines Knowledge

When you’re looking for a plastic injection molding machine, one of the most important factors to consider is the injection speed. The faster the injection speed, the more quickly your machine can produce parts. However, if the speed is too fast, it can cause defects in your parts. The injection speed is one of the […]

Molding conditions: speed, pressure, temperature, time, stroke, quantity. 1.Injection pressure (primary pressure): the pressure exerted on the plastic per unit area at the top of the screw during injection molding, P = cylinder diameter D0 / screw diameter D1 * hydraulic pressure. 2. Pressure retention (secondary pressure): molten raw materials in the cavity cooling, then

Leakage is a common fault phenomenon of the injection molding machine, mainly because of the liquid in the hydraulic components and pipeline activities when the pressure difference and the gap between the components are caused by leakage.  Other harsh working conditions will also have a particular impact on the sealing of the injection molding machine.

When we say “thermoset injection molding” what do we mean? Thermoset refers to the type of plastic being melted down and injected into molds. These are polypropylene (PP), high-density polyethylene (HDPE), etc. These materials soften when heated up, but then harden again at room temperature. You might think that thermosetting plastics are only used for

Thermoset is a type of plastic that retains strength and stiffness even when heated. On the other hand, thermoplastic is usually more malleable. Also, it can be remolded if heated. Thermoset plastics are typically less expensive than thermoplastic. Because they cannot remold the shape after heating, let’s talk about the differences between thermoset vs thermoplastic injection

The last two times have talked about these problems, to understand can click here. Causes and solutions of plastic molding shortcomings (1) The causes of and solutions to the shortcomings of plastic molding (2) 1. Deformation of finished products. Fault causes and solutions. (1) The finished product is not yet cooled when topped to reduce

Here are the causes and solutions described last week. The causes and solutions of the shortcomings of plastic molding (1)   1. Hairy head, flying edge.   Fault causes and solutions. (1) plastic temperature is too high to reduce the plastic temperature, reduce the mold temperature injection speed is too high to reduce the injection

Incorrect operating conditions, damaged machines, and molds can cause many molding shortcomings, and some solutions are provided below for reference. To reduce the downtime and find out the cause of the operation problem as soon as possible, the operator should record all the best injection molding conditions on the “Injection Molding Conditions Record Sheet” for

1. The basic principle of injection molding. The injection molding machine takes advantage of the nature that the plastic can melt into liquid after being heated to a specific temperature and injects the molten liquid into the closed mold cavity with high pressure. After cooling and shaping, open the mold and eject to get the