Polyurethane foam filled ring foaming mold

Abstract

The invention provides a polyurethane foam filled ring foaming mold. The polyurethane foam filled ring foaming mold comprises a female mold, a male mold and an injection structure, wherein the femalemold comprises a left female mold and a right female mold, after the left female mold and the right female mold are assembled, a cavity is formed inside the left female mold and the right female mold,the left female mold and the right female mold are detachably connected, the male mold comprises an upper male mold and a lower male mold, after the upper male mold and the lower male mold are assembled, the upper male mold and the lower male mold cooperate with the cavity of the female mold to define a mold cavity, the mold cavity is suitable for formation of the polyurethane foam filled ring, and the injection structure is arranged on the female mold and suitable for injecting a polyurethane foam material into the mold cavity. According to the polyurethane foam filled ring foaming mold, thefemale mold and the male mold both can be smoothly detached, during demolding, it can be avoided that demolding directly acts on the product, it is avoided that prying, beating and other operation damage the product, and an injection opening can be rapidly sealed after the foam material forms for a certain extent; and the appearance of the product is smooth, and no redundant structure exists.

Description

Technical field [0001] The invention belongs to the technical field of molds for polyurethane products, and specifically relates to a polyurethane foam filled ring foaming mold. Background technique [0002] Rigid polyurethane foam has excellent thermal insulation properties. As a new type of thermal insulation material, its application in building exterior wall thermal insulation systems, cold storage and refrigerated vehicle thermal insulation systems will promote the development of energy-saving engineering technology. Polyurethane foam filling ring is a ring-shaped sealing material, usually a ring-shaped structure with a small inner diameter in the middle and a large inner diameter at both ends. [0003] At present, polyurethane foaming usually adopts casting foaming and spraying foaming. The polyurethane foaming process has high requirements for the structural design of the forming mold, but the existing molds still have the following problems in the design: After the polyure...

AI Technical Summary

Problems solved by technology

The polyurethane foaming process has high requirements on the structural design of the forming mold, but the following problems still exist in the design of the existing molds: because the mold sticking force is relatively large after the polyurethane foaming, the structural design of the mold (that is, the mold Type) is very important to whether the product can be demolded smoothly and intact. Chinese patent document CN201800184U discloses a mold suitable for the production of radiation crosslinked polypropylene, including a female mold, a male mold, and a cover plate. The mold cavity formed by the mold molds the foaming material, but the female mold and the male mold of the mold are integral molds, and there is no point of force when the product is removed from the female mold and the male mold, and it is not easy to demould. The existing mold structure is also designed as The female mold is an integral mould, and the male mold is split in half from top to bottom. In this design, because the male mold is split in half from top to bottom, when the male mold is demoulded, the product may stay on the upper male mold or the lower male mold. Therefore, it is necessary to The demoulding design is considered on both the upper and lower male molds, which increases the difficulty of the mold structure and the risk of damage to the product during demoulding; the injection port of the existing foam mold is designed to cooperate with internal and external threads. The foam produced by polyurethane foaming during foaming is easy to block the thread, which makes it difficult for the mold to be reused and cleaned. On the other hand, the thread connection operation takes a long time. If it is blocked early during pouring and foaming, it is not conducive to the gas discharge during foaming , if the foam material rises to a certain extent before blocking, the polyurethane foam may overflow and solidify at the pouring port, forming a product body, resulting in a lot of post-processing work; The requirement for dimensional accuracy is high, while the existing mold design only considers the parting of male and female molds, without other demoulding mechanism. The demoulding method that directly acts on the surface of the product is adopted, which causes great surface damage when the product is demolded. On the other hand, when the product is pried off, the cavity surface of the mold is also damaged.

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