The guide post mainly plays a guiding role in the Table Mould(FURNITUREMOULD) to ensure that the moulding surfaces of the core and the cavity do not touch each other under any circumstances. When the table mould is designed, the guide post cannot be used as a positioning or clamping mechanism. When designing the guide post, it is necessary to consider the problem of the through-knife, otherwise the guide post will become the positioning mechanism, and the guide sleeve needs to have a vent hole to prevent a large suction force generated by the vacuum mould opening after the mould clamping. In the following cases, the seed core cavity during the injection process produces a large eccentric force in four directions. When the wall thickness of the plastic part itself is not uniform enough, the flow rate of the plastic flowing through the wall thickness will increase, and a large injection pressure will be generated here; the side of the plastic part is asymmetrical, such as a stepped table mould, which is subjected to the opposite step. The pressure is not the same, so the table mould design needs to consider the width of the parting surface. When the table mould is injected, the molten plastic in the cavity generates a huge reverse pressure, generally 600-1000 kg/cm. Table mould makers sometimes do not pay attention to this problem, often change the original design size, or replace the moving template with a low-strength steel plate. In the table mould with the top bar topping, due to the large span of the two sides, the template is injected under the injection. bend. The moving template must be made of high-quality steel. If it has sufficient thickness, it is not allowed to use low-strength steel plates such as #45. If necessary, support columns or support blocks should be placed under the moving plate to reduce the thickness of the template and improve the carrying capacity. Click Chair Mould to learn about more information.
