A production device for PC foam boards for bags

Abstract

The invention discloses a production device for PC foamed boards for luggage. The production device comprises an extruder, a distributor, a die, a shaping roll, a tractor, a shearer, a first metering pump, a second metering pump, a pressure-maintaining valve and a screen exchanger, wherein raw materials (PC raw materials can be attached with pigments or other auxiliary materials) are extruded to the screen exchanger, the second metering pump, the distributor and the die from a hopper through the extruder, and subjected to pressure relief foaming in the die, then impurities can be effectively filtered by the screen exchanger, then the raw materials enter the shaping roll to be shaped from the die, dragged to the shearer through the tractor, and subjected to shearing treatment to prepare the finished products. The foamed materials produced by the production device provided by the invention have the characteristics of being lighter in mass, higher in strength, and better in appearance and foam hole quality; according to the invention, a physical foaming method is adopted, and addition of a foaming agent during a production process is not needed, so that production cost can be saved, wastes, edgings and the like generated during suction moulding and production can all be cyclically used, and the quality of products cannot be influenced; and the production device is free from hazardous gas emission, and environment-friendly during production.

Description

technical field [0001] The invention belongs to the technical field of production of PC foam boards, and in particular relates to a production device for PC foam boards for bags. Background technique [0002] At present, the quality, weight, and price of plastic sheets used in the luggage industry are relatively high. PC foam sheets not only maintain the high-strength performance, flame retardancy, and bright color of PC sheets, but also reduce the weight of the sheets. At present, the method of producing foamed PC sheets mainly adopts the chemical foaming method, that is, adding a certain proportion of foaming agent, auxiliary agent, etc. to the plastic raw materials. During the extrusion process, when the temperature of the foaming agent is reached, the decomposed The gas achieves the purpose of foaming. This method will bring a series of problems: First, due to the uneven dispersion or moisture of the foaming agent, the size of the foaming holes will be uneven and the dis...

AI Technical Summary

Problems solved by technology

[0002] At present, the quality, weight, and price of plastic sheets used in the luggage industry are relatively high. PC foam sheets not only maintain the high-strength performance, flame retardancy, and bright color of PC sheets, but also reduce the weight of the sheets. At present, the method of producing foamed PC sheets mainly adopts the chemical foaming method, that is, adding a certain proportion of foaming agent, auxiliary agent, etc. to the plastic raw materials. During the extrusion process, when the temperature of the foaming agent is reached, the decomposed The gas achieves the purpose of foaming. This method will bring a series of problems: First, due to the uneven dispersion or moisture of the foaming agent, the size of the foaming holes will be uneven and the distribution will be uneven, which will affect the strength of the board. , which also affects the appearance of the board surface; secondly, because the foaming agent cannot be completely decomposed in one extrusion molding process, the residual foaming agent will foam again irregularly during blister molding and edge strip recycling, seriously affecting The quality of the product; again, the decomposition gas of the blowing agent or additives will overflow to affect the air environment and leave an unpleasant smell in the board

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