Multi-component foaming machine system for sandwich panel production line

Abstract

The invention discloses a multi-component foaming machine system for a sandwich panel production line. The system comprises a transverse mixing pipe, wherein the mixing pipe consists of an injection section, a contraction section, a throat section and an expansion section; a black material inlet is arranged at the lower part of the injection section; an injection head is arranged in the injectionsection; a main body of the injection head comprises a white material injection channel, a first mixing chamber, a central hole and a second mixing chamber which communicate mutually from front to back sequentially; the diameter of the rear part of the first mixing chamber is gradually reduced, and the diameter of the front part of the second mixing chamber is gradually increased; a foaming agentfeeding chamber is arranged on the front circumference of the white material injection channel, more than six foaming agent injection channels are arranged around the rear circumference, the front ends of the foaming agent injection channels communicate with the foaming agent feeding chamber, and the rear ends of the foaming agent injection channels communicate with the first mixing chamber; and an upper injection channel and a lower injection channel are symmetrically arranged on the upper and lower sides of the central hole, and the rear ends of the upper and lower injection channels are symmetrically distributed in a splayed shape and communicate with the second mixing chamber. According to the system, the black material, the white material and the foaming agent are fully mixed.

Description

technical field [0001] The invention relates to a multi-component foaming machine system for a sandwich panel production line. Background technique [0002] As we all know, in order to achieve emission reduction and energy saving in the construction field, a large number of external wall insulation materials are constantly appearing, especially phenolic and polyurethane panels are widely used in building external walls due to their good thermal insulation performance, good physical stability and cost performance . At present, the main raw materials for production are black material, white material (combined with polyether polyol, catalyst, silicone oil, flame retardant and foam stabilizer) and foaming agent. The raw materials are injected into the mold, and under certain temperature conditions, the polyisocyanate (isocyanate (-NCO)) and the combined polyether (hydroxyl (-OH)) undergo a chemical reaction under the action of a catalyst to form polyurethane and release a large...

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Problems solved by technology

At present, the main raw materials for production are black material, white material (combined with polyether polyol, catalyst, silicone oil, flame retardant and foam stabilizer) and foaming agent. The raw materials are injected into the mold, and under certain temperature conditions, the polyisocyanate (isocyanate (-NCO)) and the combined polyether (hydroxyl (-OH)) undergo a chemical reaction under the action of a catalyst to form polyurethane and release a large amount of heat at the same time. However, at present, the foaming machine system often has uneven mixing of black material, white material and cyclopentane, resulting in uneven density of polyurethane foam, large bubbles in parts, cracking of foam, local softening of foam, and white, yellow or black on the foam. Streaks, foam shrinkage phenomenon

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