Vacuum forming die for refrigerator inner liner

Abstract

The invention relates to a vacuum forming die for a refrigerator inner liner. The vacuum forming die comprises a bottom plate, a vacuum box, an F die core, an R die core and a hollowed middle die. Lower pressing strips and lower panels are arranged on the periphery of the vacuum box. The vacuum forming die further comprises an upper pressing frame assembly which comprises upper pressing strips and upper panels. Air blowing pipes and air nozzles are arranged on the periphery of each upper panel. The F die core and the R die core are each internally provided with a top lamp assembly, an oblique sliding block assembly, a water accumulating assembly and a buckle assembly. Each oblique sliding block assembly comprises an oblique sliding block body and a lifting cylinder. Each water accumulating assembly comprises a water accumulating cylinder, a four-bar mechanism and a water accumulating block connected with the four-bar mechanism. According to the vacuum forming die, the air blowing pipes and the air nozzles are used for cooling the joints of the middle die and the lower panels, uniform internal and external cooling of thick-wall portions of a product is facilitated, and deformation caused by inconsistent internal and external tension of the product is prevented; forming of water accumulating grooves in complex shapes is achieved through the four-bar mechanisms, intervention is prevented, and meanwhile demolding is facilitated; the design of the oblique sliding block assemblies facilitates forming of the refrigerator inner liner in a complex shape.

Description

technical field [0001] The invention relates to the technical field of refrigerator forming molds, in particular to a vacuum forming mold for a refrigerator box liner. Background technique [0002] The principle of vacuum forming of the refrigerator liner is to fix the thermoplastic plate (sheet) above the mold, heat it to a softened state with a radiant heater, then move the mold to the plastic plate, form a cavity between the mold and the plate, and use a vacuum pump The air in the cavity is sucked out, and the plate is formed by covering the mold with the help of atmospheric pressure. After cooling and setting, the plastic part is released from the mold with the help of compressed air. Due to the large volume, thin wall and easy deformation of the refrigerator liner, in order to remove the mold smoothly, it is often necessary to use a core-pulling mechanism. It is difficult for the existing core-pulling mechanism to use the cylinder to directly connect the forming block,...

AI Technical Summary

Problems solved by technology

The existing core-pulling mechanism is difficult to use the cylinder to directly connect the forming block, or use the small forming block itself to turn over, the rotation range is small, and it is only suitable

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