Foaming equipment, foaming process and foaming process of refrigerating equipment

Abstract

The invention discloses foaming equipment, which is used for foaming a preassembled component with a defined foaming space. The foaming equipment comprises a foaming mold, a first exhaust mechanism, a second exhaust mechanism, a first negative pressure supplying device, a sealing shell, an external exhaust mechanism and a second negative pressure supplying device, wherein the foaming mold is provided with a defined mold cavity; the first exhaust mechanism is communicated with the mold cavity; the second exhaust mechanism is arranged in the foaming space in an extending manner and is communicated with the mold cavity; the first negative pressure supplying device is connected with the first exhaust mechanism; the sealing shell is sheathed outside the foaming mold and the first negative pressure supplying device; the external exhaust mechanism and the second negative pressure supplying device are connected. According to the foaming equipment disclosed by the embodiment of the invention, negative pressure of air can be transferred into the foaming space by the second exhaust mechanism evenly, so that an insulating layer obtained after foaming has better insulating performance, the foaming materials can be saved, and the cost is reduced. In addition, due to the arrangement of the sealing shell, the foaming quality is guaranteed. The invention further discloses a foaming process employing the foaming equipment and a foaming process of refrigerating equipment.

Description

Technical field [0001] The invention relates to the field of refrigeration equipment manufacturing, in particular to a foaming device, a foaming process using the foaming device and a foaming process of the refrigerating device. Background technique [0002] At present, the refrigeration equipment on the market is mainly composed of a refrigeration system and a heat preservation box. The heat preservation box is generally made by the following processes: [0003] Assemble the outer shell and inner tank of the refrigeration equipment into a relatively closed shell, and set the filling port of the foaming material on one end of the shell, and place the box in a higher temperature environment for a period of time. Make the cabinet fully preheated. Then put the box into the foaming mold, clamp and close it. After that, the prepared foaming materials are injected into the empty box through the filling port reserved on the box. In the following 5-10 minutes, the foaming agent will reac...

AI Technical Summary

Problems solved by technology

[0005] 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;

[0006] 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;

[0007] 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

[0008] 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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