Foaming equipment, foaming process and foaming process of refrigeration equipment

Abstract

The invention discloses foaming equipment, a foaming process and a foaming process of refrigeration equipment. The foaming equipment is used to foam the pre-assembled components. The pre-assembled components define a foaming space, including: a foaming mold, the foaming mold includes a first mold and a second mold, and the first mold and the second mold cooperate with each other To define the mold cavity; the first air pumping mechanism communicated with the mold cavity; the second air pumping mechanism arranged in the foaming space and extending in the foaming space, wherein the second air pumping mechanism communicates with the mold cavity and includes : an air guide tube fixed in the foaming space, an air groove extending along its axial direction is formed on the tube wall of the air guide tube; and a first negative tube connected with the first pumping mechanism for forming a negative pressure in the foaming space pressure supply device. According to the foaming equipment of the embodiment of the present invention, the negative air pressure can be evenly transmitted into the foaming space, so that the thermal insulation layer obtained after foaming has better thermal insulation performance, and can save foaming raw materials and reduce costs.

Description

[0001] This application is a divisional application of Chinese patent application 201110007835.6, the title of the invention is "Foaming Equipment, Foaming Process, and Foaming Process for Refrigeration Equipment", and the applicants are "Midea Hefei Refrigerator Co., Ltd., Hefei Hualing Co., Ltd." technical field [0002] The invention relates to the field of refrigeration equipment manufacturing, in particular to a foaming equipment, a foaming process using the foaming equipment and a foaming process of the refrigeration equipment. Background technique [0003] The refrigeration equipment currently on the market is mainly composed of a refrigeration system and an insulated box. The insulated box is generally made by the following process: [0004] Assemble the shell and liner of the refrigeration equipment into a relatively closed shell, and set a filling port for foaming material on one end of the shell, and store the box in a high temperature environment for a period of t...

AI Technical Summary

Problems solved by technology

[0006] 1. Part of the air that is not discharged in time during the foaming process will penetrate into the foaming material and form large pores, resulting in the formation of local thermal insulation weak points in the box, and the overall thermal conductivity is high;

[0007] 2. The rapid expansion of the foaming material inside the box and the high pressure inside the box caused by poor exhaust prolong the time period for the foaming material to fill the entire box, limiting the production capacity;

[0008] 3. Due to the longer filling cycle and the increase in hardness of the foaming material during the foaming process, while the fluidity and plasticity decrease and other factors, the density of the foaming material near the filling port is higher, and it is far away from the filling port. The density of the foam material is low, which makes the thermal conductivity of the whole box uneven and the individual differences of batch products are large

[0009] 4. In the actual production of refrigeration equipment, due to the above shortcomings, it is often necessary to fill more foaming materials to achieve the corresponding thermal insulation performance, resulting in higher costs, as well as many problems such as environmental protection and energy involved.

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