Forming machine for vacuum insulated panel

Abstract

The invention provides a forming machine for a vacuum insulated panel. The forming machine for the vacuum insulated panel comprises a machine frame, a lower supporting device is arranged on the machine frame in an erecting mode, a lower die base is arranged on the lower supporting device in a lifting and erecting mode, and a lower die core is installed on the lower die base. An upper die core, a middle die frame, the lower die core and the lower die base are hollow. A bottom plate of the upper die core, an inner side plate of the middle die frame and a top plate of the lower die core are respectively provided with a communicated first exhaust passage, and a venting plug is inserted into the first exhaust passage close to the outer side and is fully provided with second exhaust passages. The lower die base is communicated with the lower die core. The outer side wall of the upper die core, the outer side wall of the middle die frame and the outer side wall of the lower die base are provided with third exhaust passages communicated with the outside. The forming machine is good in supporting stability, high in exhaust efficiency, capable of bearing large pressing force, suitable for pressing the vacuum insulated panel and high in safety coefficient, and the venting plug is convenient to dismount and replace.

Description

technical field [0001] The invention belongs to the field of forming machines, in particular to a forming machine for vacuum insulation panels. Background technique [0002] In recent years, vacuum insulation panels have been widely used to insulate refrigerators, aviation, incubators, refrigerated vehicles and external walls due to their ultra-thin, light weight, fireproof and non-combustible properties, and good thermal insulation properties. However, since the core material of vacuum insulation panels is mostly composed of ultra-fine short glass fibers and fumed silicon, these materials have small particle sizes and large specific surface areas, and the three-dimensional cross-winding between fibers will produce a large number of internal and external connections. The tiny pores and holes in the vacuum insulation panel product will generate a lot of gas during the forming process, making the automatic pressing operation impossible. Therefore, the existing vacuum insulati...

AI Technical Summary

Problems solved by technology

The above-mentioned fully automatic powder compacting machine is not suitable for pressing nano-scale microporous inorganic materials (for example, short glass fibers, gas-phase silicon, etc.), because: (1) for nano-scale microporous inorganic materials, the pressing process The pressing force of the upper mold required in the process is relatively large, and during the pressing and forming process of the hydraulic forming machine of this patent, the lower mold is in a jacked-up state, which is easy to damage the drawing cylinder below the lower mold; (2) During the pressing process of the material, The amount of exhausted gas is large. Using this equipment and its process for pressing and exhausting, the exhausting effect is poor, and effective pressing operations cannot be realized.

[0004] In addition, the publication number is that the Chinese patent of CN 1501312A has announced a kind of metal mold that can exhaust, but this metal mold is also not suitable for being used for nanoscale microporous inorganic material (for example, short glass fiber, fumed silicon etc.) In the molding machine for pressing, the reasons are: (1) Since the exhaustable metal mold is mainly used for pressing powder materials, the pore size of the fiber permeable layer is very small, and the gas in the mold cavity finally passes through the exhaust gas. The hole diameter and exhaust area of ​​the entire exhaust channel are small, the exhaust efficiency is low, and it is not suitable for the pressing of vacuum insulation panels; (2) only the upper mold core and the lower mold core are equipped with ventilation devices, Small ventilation area

In addition, this exhaustable metal mold also has the following disadvantages: (1) Since this exhaustable metal mold is mainly used for pressing powder materials, the requirements for the aperture of the fiber air-permeable layer are higher (that is, the aperture of the fiber air-permeable layer Very small), during the pressing process, the air pressure on the surface of the fiber air-permeable layer is relatively large, and the pressure transmitted to the rigid air-permeable board is also relatively large, resulting in the rigid air-permeable board being easily deformed by force, which seriously affects the quality of the final bad body ; (2) Neither the fiber permeable layer nor the rigid permeable plate has a detachable function, and it is inconvenient to replace; (3) The through holes on the rigid permeable plate are not evenly distributed, so that the gas cannot be discharged uniformly, resulting in differences in the same plane inside the cavity. Uneven pressure at the position can easily cause uneven density of bad bodies

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