Plastic large plane bending regulation device of plastic

Abstract

The invention discloses a plastic large plane bending regulation device. The plastic large plane bending regulation device comprises an upper molding block and a lower molding block, wherein the upper molding bock is connected with the lower molding block through connection bolts; a molding cavity is formed between the upper molding block and the lower molding block; an anti-warpage regulating screw is mounted at the middle part of the upper molding block; an upper adjusting screw thread is connected with the lower end of the anti-warpage regulating screw; an anti-warpage screw plug is mounted on the upper lower molding block; and the upper end of the anti-warpage screw plug butts against a lower adjusting screw thread. The plastic large plane bending regulation device can be used for regulating the single-side anti-warpage amount of the molding block, and can ensure the plane quality of the visual surface of a profile in combination with vacuum degree regulation of a vacuum negative-pressure water tank, thereby overcoming the disadvantages on design and enhancing the adaptability to the extrusion process.

Description

Technical field [0001] The invention relates to a plastic large-surface bending adjustment device. Background technique [0002] The hollow profile passes through the dry vacuum setting die. Even if the sides are uniformly cooled and shaped, the profile will eventually bulge out warping deformation, and the amount of warpage will increase monotonously with the side length of the profile frame, which is different from the extrusion die. Practice is consistent. At present, in order to solve this problem and stably produce high-quality profiles, the cavity walls of the shaping die and the shaping block are designed with convex surfaces with opposite convex directions. The convex part of the convex surface is called the anti-warpage amount. The amount of anti-warpage is the same as the amount of warpage of the profile, and the direction is opposite. Finally, let the profile continue to cool and shrink in an unconstrained state, and the amount of convex warpage produced just offset t...

AI Technical Summary

Problems solved by technology

However, the amount of anti-warpage is determined by factors such as profile traction speed, different convective heat transfer coefficients (including water temperature, water pressure and vacuum degree, etc.), wall thickness, etc., but these factors are adjusted Deviations are easy to occur at the time, and these deviations will cause the large surface of the profile to be not straight enough, the shape is not accurate enough, affect the apparent quality of the profile, and even affect the physical properties of the profile

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