Analysis of The Cause of Bursting for Cushion Mold
Cushion mold refers to a commonly used molding process in the plastics industry. It is characterized by an incision made in the wall of the part. The upper and lower molds slide in relative motion to compresses the part walls and join them together to form a single, hermetically sealed product. This process is widely used to produce various parts in almost all industries, including automotive and electronics.
However, the cushion mold can be very prone to bursting during operation. The bursting can catastrophically reduce product quality, jeopardize safety, and disrupt operation. Therefore, it is important to thoroughly understand the cause of cushion mold burst before they can be effectively solved. Generally, the bursting of the cushion mold is due to three main causes: improper design, poor equipment maintenance and too much material feeding.
First, improper cushion mold design is a common cause of burst. When the thickness of the product wall is larger than the size of the cushion block or the crimping guide, it can put too much pressure on the wall and cause it to burst. Also, when the cut-off segment design on the wall of the product is too large, it can cause the plastic material being overextended, which will induce the tearing of the material. So careful engineering design is vital to avoid this kind of malfunction and guarantee good product quality.
Second, poor equipment maintenance can also cause cushion mold burst. Accumulated plastic residue, material labeling or misalignment of the mold can all lead to size errors and reduce the strength of the product. Unstable temperature or pressure can also damage the product surface and make it more vulnerable to cracking. Therefore regular maintenance is important to guarantee proper functioning of the equipment and guard against material wastage and product defects.
Finally, too much material feeding into the mold can also trigger burst. Overfilling the mold will cause the inner wall of the product to be overloaded, resulting in the product wall being easily broken, as well as defective product. Excess material can also interfere with the smooth movement of the upper and lower molds and lead to sharp increase of the product wall compressing force.
In conclusion, burst of the cushion mold can be caused by improper design, poor equipment maintenance, and too much material feeding. Detection and correction of these issues should be a high priority. For the design, the dimensions of each part should be taken into accounts and aligned with the exact size of the cushion block. For the maintenance, it is important to regularly clean the machine and maintain its temperature and pressure properly. For the material feeding, the amount of material should be kept within the correct range. With these simple but essential processes, the bursting of the cushion mold can be effectively avoided.
