Refrigerating door foaming mold with good positioning accuracy and good demolding convenience

Abstract

The invention discloses a refrigerating door foaming mold with good positioning accuracy and good demolding convenience, comprising a base. The upper end face of the base is provided with a hydrauliccylinder base; a lower mold is arranged below the hydraulic cylinder base; an upper mold is arranged above the lower mold; the upper mold and the lower mold form a foaming chamber; the upper end faceof the upper mold is provided with an upper mold mounting plate; each of four corners of the lower end face of the upper mold mounting plate is provided with a circular cavity; each of the four corners of the upper end face of the base is provided with a first hydraulic cylinder fitly connected with the corresponding circular cavity; the left and right ends of the foaming chamber are provided respectively with a gas discharge pipe connected with a gas pump and an injection pipe connected with a foaming gun head; a plurality of oil injection pipes are arranged in the upper mold and the lower mold; the surface of the foaming chamber is coated with polytetrafluoroethylene film. The defects of the prior art are overcome; positioning accuracy is good; demolding is easy; a product can be ejectedout quickly; the mode of material injecting along with gas extracting and the mode of injecting cold and hot oil into the oil injection pipe help greatly improve the quality of foamed plastic.

Description

technical field [0001] The invention relates to the technical field of foaming molds, in particular to a foaming mold for a refrigerator door with precise positioning and easy demoulding. Background technique [0002] The mold for foam molding is a plastic foam mold. The foamable resin is directly filled into the mold, and it is heated and melted to form a gas-liquid saturated solution. Through nucleation, a large number of tiny bubble nuclei are formed, and the nuclei grow. There are three commonly used foaming methods for foam plastic parts: physical foaming method, chemical foaming method and mechanical foaming method. During the production process of the refrigerator door, foaming material needs to be filled between the outer shell and the inner lining of the refrigerator door, and this process is generally completed in a foaming mold. [0003] In the past, when the refrigerator door was demolded after foaming, one side of the upper mold and the lower mold were connecte...

AI Technical Summary

Problems solved by technology

[0003] In the past, when the refrigerator door was demolded after foaming, one side of the upper mold and the lower mold were connected by a hinge, and the other side was opened by a cylinder. During the opening process of the upper mold, it was easy to cause the upper mold The door body at the intersection with the lower mold is scratched. Since the sides of the upper mold and the lower mold are connected by hinges, the hinges will wear and loosen after a long time, which will lead to a decrease in the positioning accuracy of the foaming mold. Unable to align, thus affecting the final foaming quality of the product

The existing foaming molds do not take into account that during the foaming production process, the temperature change of the mold and the fluidity of the foaming liquid in the foaming cavity will affect the quality of the foamed plastic parts, so when the mold is put into production, it is easy to Produce unqualified products, resulting in low yield

[0004] The cylinder is used as the power source. Because the thrust of the cylinder is small, it is easy to open the mold and the mold opening speed is slow. At the same time, the volume of the refrigerator door after foaming is relatively large, and the existing mold is not equipped with a product ejection device, resulting in It is difficult to remove the product from the mold

Since the power source is a cylinder, an external compressed air station is required, and in the production process, power energy needs to be continuously consumed, and the compressed air is generated through an air compressor, which has a high failure rate and an increase in mold costs

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