Foaming apparatus, foaming process and foaming process of refrigerating device

Abstract

The invention discloses a foaming machine which is used for foaming a preassembled assembly that is provided with a foaming space defined therein. The foaming apparatus comprises a foaming die for defining a die cavity, a first air exhauster mechanism communicated with the die cavity, a second air exhauster mechanism arranged in the foaming space in an extending manner, a first negative pressure providing device and a sealing member, wherein the second air exhauster mechanism is communicated with the die, the first negative pressure providing device is connected with the first air exhauster mechanism and used for forming negative pressure in the foaming space; and the sealing member is arranged on a contact surface between a first die and a second die and used for sealing the die cavity. According to the foaming apparatus provided by the embodiment of the invention, by adopting the second air exhauster mechanism, air negative pressure can be uniformly transmitted into the foaming space, therefore, an obtained insulation layer has better performance, foaming raw materials can be saved, and cost is lowered. In addition, the sealing member can ensure that low pressure is kept in the foaming space in a foaming process and the foaming quality is further ensured. The invention also discloses a foaming process by adopting the foaming apparatus and a foaming process of a refrigerating device.

Description

technical field [0001] 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 [0002] 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: [0003] 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 time. Make the cabinet fully preheated. Then put the box body into the foaming mold and clamp and close it. After that, inject the prepared foaming material into the empty box through the filling port reserved on the box body. In the next 5 to 10 minutes, the foaming agent will undergo a chemical re...

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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