Processing technology for solving rough joint line of PET bottle preform

Abstract

The invention discloses a processing technology for solving a rough joint line of a PET bottle preform. The processing technology comprises the following steps: S1, carrying out forming processing on a butt joint opening of a cavity to be formed; carrying out axial outer circle grinding on the butt joint opening of the to-be-formed cavity to form a first forming section a; carrying out forming processing on a butt joint port of the to-be-formed sprue mold core; when the cavity is in butt joint with the sprue mold core, forming, by the first forming section a and the second forming section b, a smooth butt joint section; S2, carrying out forming processing of a cavity to be formed; forming and processing a to-be-formed pouring gate mold core; S3, carrying out butt joint on the cavity with the sprue mold core; and S4, polishing, grinding and brightening a butt joint port of the cavity and the sprue mold core. According to the invention, the excircles of the cavity and the sprue mold core are ground in place, then the grinding positions of the excircles are turned and formed, and finally the joint line position is ground, polished and brightened, so that the problem that the joint line of the formed PET bottle preform is rough is solved, the quality of the formed bottle preform is ensured, and the appearance of the formed product and the bottle blowing effect of the formed bottle preform are further ensured.

Description

technical field [0001] The invention relates to the technical field of preform production molds, in particular to a processing technology for solving the problem of thick stitching lines of PET preforms. Background technique [0002] PET preforms are formed by injection molding, and the forming mold includes gate core, cavity and so on. In the existing forming mold, the gate mold core and the cavity joint position are formed by turning, and then turning and polishing are carried out. Such processing technology has poor roundness control accuracy of molding dimensions during lathe processing, and anti-burrs on the edges affect dimension detection. At the same time, it is difficult to guarantee the size of the turning process, and the tolerance of the processed workpiece is 2-3 wires (0.02-0.03mm), so the stability of the cavity and the gate mold core is poor when it is docked. [0003] Polishing and polishing of car processing needs to use sand to go through a process befor...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a processing technology to solve the problem of thick stitching line of PET bottle embryos. First, the outer circle of the cavity and the gate mold core is ground in place, and then the outer circle grinding position is turned into a car. , and finally grind and polish the position of the seam line to solve the problem of thick seam line of the formed PET preform, ensure the quality of the formed preform, and then ensure the appearance of the formed product and the blowing effect of the formed preform

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