A high-temperature tunnel furnace for foaming

Abstract

The invention provides a high temperature tunnel kiln for foaming. The high temperature tunnel kiln for foaming comprises a feed station, a discharge station, a heating kiln body, a conveying device and a main controller. The conveying device is connected with the feed station and the discharge station and penetrates through the heating kiln body, and circulation conveying is formed. The heating kiln body comprises a preheating function area, a transition function area, a foaming function area and thermal insulation devices, and the thermal insulation devices are arranged between every two adjacent function areas and are used for separating the three function areas. According to the provided high temperature tunnel kiln for foaming, through the conveying device, to-be-foamed materials areconveyed from the feed station and pass through the preheating, transition and foaming function areas of the heating kiln body, after foaming, the materials are conveyed to the discharge station, andthe foaming process is continuous and uninterrupted. The heating kiln body is divided into the three large function areas through the thermal insulation devices, thus a plurality of independent spacesare formed in the foaming space, in the continuous foaming process, through heating of different temperatures, space is narrowed, an inner heating air circuit is short, uniformity of the inside temperature is good, and foaming quality is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of foaming of foam materials, in particular to a high-temperature tunnel furnace for foaming. 【Background technique】 [0002] The full name of the PMI foam in the foam material is polymethacrylimide foam, which is a lightweight and high-strength foam plastic, mainly used in aerospace, radar antenna covers, CT medical bed boards, wind power helicopter blades, and high-speed In the train, it is currently the hardest structural new material under the same density condition. Most of the industrial production of PMI foam adopts the method of first polymerizing the raw materials to obtain the copolymer resin, and then putting the obtained copolymer matrix resin into the tunnel furnace. Heat to foam. [0003] In the related art, the tunnel furnace used for PMI foam foaming adopts a multi-process multi-layer foaming oven, that is, multi-layer shelves for placing foam materials are arranged in the foaming oven, an...

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Problems solved by technology

[0003] In the related art, the tunnel furnace used for PMI foam foaming adopts a multi-process multi-layer foaming oven, that is, multi-layer shelves for placing foam materials are arranged in the foaming oven, and by changing the heat in the foaming oven, The air flows to heat the foaming material to increase the number of single foaming to improve production efficiency. However, this foaming method needs to go through multiple foaming processes, and because the foaming space is large, the hot air in the foaming space Long circuit, poor internal temperature uniformity and consistency, resulting in low foaming efficiency and poor foaming quality

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