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How to improve the performance of rotational molding products?

2020-12-17 15:23:02
Times

1. Adjust the proper distance between the air pipe and the inner part of the mould. The diameter of the vent pipe is determined by the product specification and material function. (generally, the hole diameter of thick wall finished products is 10-12mm per cubic mould), and the length of the pipe shall be in accordance with the depth of the finished die, and the end of the pipe shall be extended to the middle of the die core or to a suitable position. In order to prevent the resin powder from overflowing from the exhaust port when the mold is twisted, the vent pipe needs to be filled with glass fiber, steel wool, graphite (chemical formula C) powder, etc.


2. When the mold temperature is slow, the furnace temperature is developed (melting temperature) or heating is added, the material is rich and the body is running smoothly.

Rotational Molding

3. In the mold, the coating alias "plastic king, Hala" (polytetrafluoroethylene) coating replacement (with one material to replace another material (see more strong to replace the weak post)) all kinds of film remover, interconnected, the mold interior boring. In addition to storing oil in the hydraulic system, the rotational plastic military oil tank also has the effects of heat dissipation, breaking up bubbles in the oil and settling the residue.


4. If it is an insert identity hazard, stop heating the insert and surrounding area.


5. In the process of material and mold design, we should enrich the following methods to remove bubbles or blowholes: adopt materials with higher melt speed, adopt lower density (modules: g/cm3 or kg/m3), lower the material, improve the mean value of die wall thickness, increase natural cooling time, slow down spray (sprinkling) cooling, and the convex or protrusion parts of products should not be too narrow or too high (corresponding to die). The groove on the tool should not be too narrow or too deep. The rotational plastic military fuel tank must have sufficient capacity to meet the requirements of heat dissipation as far as possible.


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