A kind of eps foam molding equipment

Abstract

The invention discloses EPS foam molding equipment, which relates to the field of EPS foam preparation, including a foaming box, a driving device for feeding and blowing air to the foaming box, and a drive for discharging and blowing air to the foaming box. Device two, the present invention pre-foams the EPS beads through a steam generator, and blows the pre-foamed large EPS beads into the separator through the cooperation of the driving device one, the feed hopper and the air inlet pipe one. In the selection room, the unfoamed ones remain in the foaming room for foaming and realize the non-interference between the feeding and the air supply, preventing the unfoamed EPS beads just sent in from being blown into the inlet by mistake, and finally enabling the The particle size and specific gravity of the EPS beads blown into the inlet are uniform, and the product density gradient is small. Through the cooperation of the drive device 2, the discharge port and the air inlet pipe 2, and the function of the negative pressure fan, the The debris formed by the collision of the pre-expanded EPS beads makes the final collection of pre-expanded EPS beads with uniform specific gravity and small density gradient.

Description

technical field [0001] The invention relates to the field of EPS foam preparation, in particular to EPS foam molding equipment. Background technique [0002] The process of EPS foam molding includes pre-expansion, aging and molding. The pre-expansion is to heat the EPS bead product to make it expand to a certain extent. In the industry, a continuous steam pre-expansion machine is often used to feed the pellets. The container is continuously fed into the cylinder, and the beads are heated and expanded. Under the action of stirring, due to the different densities, the heavier ones are on the bottom and the lighter ones are on the top. The feed port is pushed into the air duct by centrifugal force and enters the blower. Although the process of steam pre-foaming is simple, it still has the following disadvantages: when the steam pre-foaming time is the same, some beads are not pre-foamed completely, The resulting pre-expanded beads have uneven particle size and specific gravity...

AI Technical Summary

Problems solved by technology

[0002] The process of EPS foam molding includes pre-expansion, aging and molding. The pre-expansion is to heat the EPS bead product to make it expand to a certain extent. In the industry, a continuous steam pre-expansion machine is often used to feed the pellets. The container is continuously fed into the cylinder, and the beads are heated and expanded. Under the action of stirring, due to the different densities, the heavier ones are on the bottom and the lighter ones are on the top. The feed port is pushed into the air duct by centrifugal force and enters the blower. Although the process of steam pre-foaming is simple, it still has the following disadvantages: when the steam pre-foaming time is the same, some beads are not pre-foamed completely, The resulting pre-expanded beads have uneven particle size and specific gravity, resulting in a large density gradient in the product, and pre-expansion materials with different densities have a greater impact on the subsequent foam molding process, which can easily lead to The density of the finished foam is uneven, which affects the strength or shape; the collision between the EPS beads in the pre-expansion process produces more debris, resulting in uneven product density, so further improvement of the existing equipment is required

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