Combined type preform taking and cooling device and method thereof

Abstract

The present invention discloses a combined type preform taking and cooling manipulator and a method thereof. A cooling cylinder is arranged on the preform taking manipulator. A bottle preform pushed out by an ejector in a die cavity is cooled in the cooling cylinder on the manipulator for the first stage. When the manipulator moves to a position corresponding to a cooling pin, the cooling pin extends into the bottle preform and sprays gas (air) to carry out forced convection cooling for the inner surface of the bottle preform. The adoption of the novel combined cooling mode not only can ensure uniform cooling for the interior and the exterior of the bottle preform, but also can largely improve cooling efficiency. Meanwhile, the present invention adopts the design that the inner circulating pipe of the cooling cylinder integrates arch-shaped grooves and spiral grooves. The design improves the heat absorption area of the cooling cylinder, the volume of cooling fluid passing through the cooling cylinder and the cooling efficiency of the bottle preform, makes the integral cooling of the bottle preform more uniform, and improves the integral quality of the bottle preform.

Description

technical field [0001] The invention relates to a combined preform fetching and cooling device and method for solving the problems of preform fetching and cooling in the process of preform production by a preform injection molding machine. Background technique [0002] In the past, the preform injection molding machine formed a plurality of closed mold cavities when the mold was closed. After the plastic melt was injected and filled the mold cavity, after a predetermined period of standing and cooling, the preform was condensed and shaped, and the mold was opened. , the ejector mechanism pushes the preform out of the mold cavity, which completes the entire preform manufacturing process. [0003] However, in the above-mentioned preform injection molding machine, in order to prevent the injection-molded preforms from colliding with each other and damaging the preform appearance when they are demolded, the preforms need to be completely finalized, resulting in longer cooling ti...

AI Technical Summary

Problems solved by technology

In comparison, this method has higher cooling efficiency, but it cannot cool the outer surface of the preform, resulting in relatively poor shape dimension accuracy and outer surface quality of the product

At the same time, unreasonable design will cause the cooling gas ejected from the cooling pin to scatter in the space formed by the cooling pin and the inner surface of the preform, resulting in a cyclone phenomenon, which will lead to uneven cooling of the inner surface of the preform, resulting in The deformation of the embryo affects the overall quality of the preform

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