There are many reasons for the warpage and deformation of the Dustbin Mould(FURNITUREMOULD). On the one hand, the structure of the product itself, on the other hand, the injection moulding process and the mould to adjust. 1. Insufficient cooling or uneven When it is not fully cooled, the top thrust of the ram tends to deform the moulded part, so that it is deformed if it is not sufficiently cooled. The countermeasure is to fully cool in the cavity, and then it can be ejected after being completely hardened. It is also possible to reduce the mould temperature and extend the cooling time. However, some of the moulds have insufficient local cooling, and it is not possible to prevent deformation under normal moulding conditions. In this case, consider changing the path of the cooling water, the location of the cooling channel, or adding additional cooling holes. In particular, consider using no water cooling or air cooling. 2. The ejector caused Some of the parts have poor mould release properties, and the ejector rods are forcibly demolded to cause deformation. For a plastic structure that is not easily deformed, it is not deformed but cracks. For ABS and polystyrene parts, this deformation causes the surface of the dustbin mould product to be whitened by the top of the push (refer to cracking, cracking, microcracking, and blushing). The elimination method is to improve the polishing of the mould, make it easy to release the mould, and sometimes use the release agent to improve the mould release. The most fundamental improvement method is to grind the core, reduce the mould release resistance, or increase the draft angle, and add an ejector pin at the location where it is difficult to the ejector, and it is more important to change the ejector mode. 3. Caused by moulding strain The deformation caused by the forming strain is mainly caused by the difference in the direction of the forming shrinkage and the change in the wall thickness. Therefore, increasing the mould temperature, increasing the melt temperature, lowering the injection pressure, improving the flow conditions of the casting system, etc., can reduce the difference in the shrinkage rate in the direction. However, it is often difficult to correct only the moulding conditions. In this case, it is necessary to change the position and number of gates, such as injection from one end when forming a long rod. Sometimes it is necessary to change the configuration of the cooling water channel; the leg of the garbage can mould is more easily deformed, and sometimes the partial design of the changing piece needs to be provided with a reinforcing rib on the back side of the upper side. It is most effective to use auxiliary tool cooling to correct this deformation. If it cannot be corrected, the mould design must be corrected. Among them, the most important thing is to make the wall thickness of the product consistent. In the case of unavoidable, it is only necessary to correct the deformation of the product and correct the dustbin mould in the opposite direction to correct it. Click Crate Mould to learn about more information.
