Extrusion mold using reflux thimble and cooling elastic plate to quickly cool plastic profile

Abstract

The invention discloses an extrusion mold using a reflux thimble and a cooling elastic plate to quickly cool a plastic profile. The extrusion mold structurally comprises a clamping plate, an upper guiding column hole, a mold core plate, a lower guiding column and an elastic plate device; a condensing tube surrounds the cooling elastic plate by one circle, meanwhile, by adopting a spiral surrounding mode, the condensing tube is cooled, thus the large temperature difference is formed between the condensing tube and a formed high-temperature plastic product, the mutual bonding probability is decreased, and the condensing tube and the formed high-temperature plastic product are easier to separate accordingly; meanwhile, the heat expansion phenomenon of the cooling elastic plate is avoided, pop-up delay of the cooling elastic plate due to friction is avoided, and thus the action of the cooling elastic plate is played normally; the air output sequence of the thimble and an air jacking tube is controlled, air blowing continuity is improved, the mode of air blowing is increased, and thus the plastic product falls off more easily; an air valve conducts air blowing and pressurizing through an air cavity tube, and thus the thimble overcomes an annular spring to be popped up; and meanwhile, the air jacking tube is in a communicating state through a sliding control plate, air starts to be blown between the plastic product and a mold core, on the basis of physical pushing of the elastic plate, the air blowing effect is improved, and the demolding efficiency is improved.

Description

technical field [0001] The invention relates to a quick-cooling plastic profile extruding mold which utilizes a reflux thimble to cool a spring plate, and belongs to the field of injection molds. Background technique [0002] Injection molds generally heat the material at high temperature, and then inject it into the mold through high-pressure injection molding. After rapid cooling, it is formed instantly, and then the demoulding is completed by blowing the air cap in the core. However, due to the cover-shaped product , the thickness is limited, and there is a certain temperature when demoulding. Simple air outlet is easy to deform the plastic product cover, and the thinner part bulges, which cannot be demolded smoothly, so the cooperation of the spring plate is required. [0003] However, the existing plastic profile extrusion dies have the following disadvantages: [0004] 1. The spring board simply clings to the edge of the product to complete the two actions of pop-up a...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a quick-cooling plastic profile extrusion die that utilizes a reflow thimble to cool down the spring plate, so as to solve the problem that the spring plate simply clings to the edge of the product to complete the two actions of ejection and retraction. It can assist extruding products through direct physical extrusion, without blowing effect, and there is a greater chance of error. The spring plate is located inside the core, and it will gradually heat up, expand with heat and contract with cold, which will increase the gap between the spring plate and the core. The friction will delay the pop-up time, which will easily cause damage to the core. At the same time, if the pop-up is not timely, there will be a mistake in blowing with the air cap in the core, resulting in the problem that the product cover cannot be demolded.

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