The structural form of the injection mold and the processing quality of the mold directly affect the quality and production efficiency of the plastic parts. Sometimes there might have such problems, for example, the injection molded part cannot drop off freely. The part is stuck on the gate. During the injection molding process, the gate sticks to the gate sleeve and is not easy to come out. When the mold is opened, the product has crack damage. In addition, the operator must knock out the...

The cooling effect of the mold directly affects the quality and production efficiency of the product, such as poor cooling, large shrinkage of the product, or uneven shrinkage and deformation of the warped surface. On the other hand, the whole or part of the mold is overheated, so that the mold cannot be formed normally and production is stopped. The design and processing of the cooling system depends on the shape of the product. Do not omit this system because the mold structure is complex...

When the mold is injected, the molten plastic in the mold cavity produces a huge back pressure, generally 600 ~ 1000 kg/cm2. Mold makers sometimes do not pay attention to this problem, and often change the original design size, or replace the moving template with low-strength steel plates. In the mold with ejector ejector, due to the large span between the seats on both sides, the template bends down during injection. Therefore, the moving formwork must be made of high-quality steel, with...

The guide pillars mainly plays a guiding role in the mold to ensure that the molding surfaces of the core and the cavity do not touch each other under any circumstances, and the guide pillars cannot be used as a force-bearing part or a positioning part. In the following cases, when the injection is moved, the fixed mold will generate a huge lateral deflection force: (1) When the wall thickness of the plastic parts is not uniform, the flow rate of the material passing through the thick wall...

Fixed-distance tensioning mechanisms such as swing hooks and hasps are generally used in fixed mold core pulling or some secondary demolding molds. Because such mechanisms are arranged in pairs on both sides of the mold, their actions must be synchronized, that is, When the mold is closed, it is buckled at the same time, and when the mold is opened to a certain position, the hook is released at the same time. Once the synchronization is lost, the template of the drawn mold will be skewed and...

For large molds, due to the different filling rates in all directions, and the influence of the self-weight of the mold when the mold is installed, the moving and fixed molds are offset. The lateral deflection force will be applied to the guide pillar during injection. When the mold is opened, the surface of the guide pillar will be rough and damaged. In severe cases, the guide pillar will be bent or cut off, and even the mold cannot be opened. In order to solve the above problems, a...

The quality of the self-made ejector is better, but the processing cost is too high. Now, standard parts are generally used, and the quality is poor. If the gap between the ejector pin and the hole is too large, there will be leakage, but if the gap is too small, the ejector pin will be stuck due to the increase of mold temperature during injection. What's more dangerous is that sometimes the ejector pin is pushed out of the normal distance and will not move and break. As a result, the...

How can we improve the precision management of our injection molds during processing? First of all, we need to know what problems affect the accuracy of injection mold production and processing. Dimensional accuracyRefers to the conformity and extent of the actual working size of the processed part with the tolerance of the part's size.The dimensional accuracy is controlled by the dimensional tolerance. The dimensional tolerance is the allowable amount of change in the size of the part during...