Dry type shaping die capable of eliminating profile surface splicing traces

Abstract

The invention discloses a dry type shaping die capable of eliminating profile surface splicing traces. The dry type shaping die comprises a bedplate and a shaping assembly, wherein the shaping assembly consists of a plurality of die plates, a cooling water passage is arranged in each die plate and is arranged around a die cavity, and the outer wall of each die plate is provided with a water inlet joint and a water outlet joint; an air chamber and an air groove are arranged between the end surfaces of the two adjacent die plates, each air chamber is arranged around the corresponding die cavity, and each air groove is communicated with the corresponding air chamber and the corresponding die cavity; each die plate in the middle part is respectively provided with an upper transverse air passage and a lower transverse air passage above and under the corresponding air chamber, and each upper transverse air passage and the corresponding transverse air passage are mutually communicated; an upper longitudinal air passage and a lower longitudinal air passage are arranged between the end surfaces of the two adjacent die plates and are used for communicating the corresponding air chamber, the corresponding upper transverse air passage and the corresponding lower transverse air passage; the outer wall of one or a plurality of die plates in the middle part is provided with an upper main air passage and a lower main air passage which are communicated with the corresponding upper transverse air passage and the corresponding lower transverse air passage; the outer wall of each die plate is provided with an upper air suction joint and a lower air suction joint which are communicated with the corresponding upper main air passage and the corresponding lower main air passage. The dry type shaping die has the advantage that as the surroundings of each die cavity are continuous and are free from gap, the splicing trace of the foaming surface can be eliminated, and the appearance quality and strength of the profile can be improved.

Description

technical field [0001] The invention relates to a dry-type sizing die for shaping plastic extruded parisons, in particular to a dry-type sizing die that can eliminate splicing marks on the surface of profiles. Background technique [0002] The dry sizing die is a device used to sizing the parison extruded from the die. Usually the dry setting mold consists of several templates stacked up and down. As disclosed in CN201249520Y, the dry setting die is composed of upper and lower cover plates and upper and lower templates in the middle, and the cavity is respectively arranged on the upper and lower templates. Due to the assembly error of the setting mold and the inevitable repeated opening, there is a gap between the upper and lower templates at the parting surface. It is inevitable to leave traces on the surface, that is, splicing marks. Especially for foamed profiles, due to the presence of large rounded corners, splicing marks on the surface of the profile will affect the...

AI Technical Summary

Problems solved by technology

Especially for foamed profiles, due to the existence of large rounded corners, splicing marks on the surface of the profile will affect the appearance quality of the foamed profile, resulting in an increase in the rate of defective products, which will greatly increase the production cost

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