Separable negative pressure foaming machine with bottomless bucket, and preparation method thereof

Abstract

The invention discloses a separable negative pressure foaming machine with a bottomless bucket, and a preparation method thereof. The separable negative pressure foaming machine comprises a stirring device, a hydraulic lifting device, a negative pressure air extraction device, a separable stirring bucket and a discharge device, wherein the separable stirring bucket comprises the bottomless bucketand a sealing cover; the hydraulic lifting device is fixedly connected with the sealing cover through an upper pull rod; the sealing cover is movably connected with the bottomless bucket through a cylinder and a lower pull rod; and the cylinder realizes the closure and separation of the sealing cover and the bottomless bucket. The separable negative pressure foaming machine disclosed by the invention overcomes the technical problems that the internal structure defects of a product are caused due to air mixing during stirring, and the inner wall of a bucket bottom cannot be self-cleaned and residues exist, so that the production efficiency is reduced, in the prior art, and the provided foaming equipment with the polyurethane bottomless bucket and a negative pressure defoaming stirring device realizes that the next foaming can be carried out without the need of cleaning for a bucket body, and continuous industrial production is efficient and rapid; and meanwhile, the foam holes of foam are fine and uniform, so that the perforation and structure defects are greatly reduced, the mechanical strength of the product is increased, and the appearance quality of the product is improved.

Description

technical field [0001] The invention relates to the technical field of foam production, in particular to a detachable bottomless bucket negative pressure foaming machine and a preparation method thereof. Background technique [0002] Foaming material is a porous material that is mixed evenly by stirring equipment after adding foaming agent to the polymer, and then put into the mold or formed on the assembly line. It is a kind of lightweight, good strength, friction resistance, sound absorption, heat preservation, etc. High-performance materials with various advantages are widely used in various fields such as automobiles, construction, biology, heat preservation, medical treatment, and electrical appliances. [0003] At present, there are roughly the following types of foaming materials that are widely used: polyethylene foam, polypropylene foam, ethylene-vinyl acetate copolymer foam, melamine foam, polyurethane foam, etc. They all need a high-efficiency foaming and mixing ...

AI Technical Summary

Problems solved by technology

Usually, when the stock solution of each component of box-type foaming is stirred and reacted in the foaming mixing device, because the high-speed rotating stirring head will bring a large amount of air into the mixed liquid during the stirring process, and the viscosity of the mixed liquid is relatively high, the bubbles cannot float up and discharge , resulting in a large number of perforations in the internal structure of the foam to form structural defects

These large perforations and defects will lead to a decrease in the strength of the foam, a decrease in sound absorption performance, prone to chipping, reduced wear resistance, and affect the appearance of the product

However, the negative pressure foaming devices currently on the market are often of the bottomed reactor type, and the inner wall cannot be self-cleaned, and the reaction residues will be consolidated, which reduces the ease of operation of the box-type foaming, seriously affects the foaming continuity, and greatly reduce production efficiency

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