Hot perfusion foaming process in refrigerator cabinet

Abstract

The invention discloses a hot perfusion foaming process in a refrigerator cabinet, and relates to the technical field of refrigerator cabinet foaming box body preheating. The method comprises the steps that heat is directly poured into a preassembled box body of the refrigerator cabinet through heating type equipment; heat is directly injected into the refrigerator cabinet preassembled box body from the material injection opening through the heating type equipment; and the heating equipment is a hot air filling machine. Heat is injected into the box body through the hot air equipment to achieve preheating of parts in the box body. Compared with the prior art, the method has the following advantages that firstly, heat perfusion in the box is better in preheating effect compared with preheating outside a drying tunnel, quality problems such as back debonding and bubbles are improved, secondly, heat perfusion in the box can replace a traditional drying tunnel preheating mode, energy is saved, finally, through heat perfusion in the box body, foaming crust is thinner, and the foaming effect is better. The foaming core density is reduced, and the product cost is saved.

Description

technical field [0001] The invention belongs to the technical field of preheating of a refrigerator cabinet foam box, and in particular relates to a thermal infusion foaming process in a refrigerator cabinet box. Background technique [0002] In order to control the foaming quality of the refrigerator cabinet and prevent the occurrence of quality problems such as debonding, the current heating method of the refrigerator cabinet is the drying tunnel heating method. The high ambient temperature in the enclosure heats the box of the refrigerator cabinet. This heating method is heated from outside to inside, and the internal temperature is low. After the box is out of the enclosure, the temperature drops quickly, and the heating effect is effective; under the extremely cold conditions in winter, the preheating effect still cannot reach the expectation, and the back of the foam falls off. The problem of sticking is prominent, and in severe cases, the side panels will be debonded...

AI Technical Summary

Problems solved by technology

This heating method is heated from the outside to the inside, and the internal temperature is low. After the box is out of the enclosure, the temperature will drop quickly, and the heating effect will be improved; under the extreme cold conditions in winter, the preheating effect still cannot meet the expectation, and the back of the foam will fall off. The sticking problem is prominent, and in severe cases, the side panels will be debonded

Secondly, the preheating oven is a high-energy-consuming equipment, and the energy used is relatively high

Finally, preheating outside the box is not conducive to the reaction and flow distribution of the foaming material, resulting in many foaming bubbles, thick crust, and uneven density distribution, which leads to an increase in the overall cost of the product

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