CN111559043A

CN111559043A - Multi-component foaming machine system for sandwich board production line

Info

Publication number: CN111559043A
Application number: CN202010489519.6A
Authority: CN
Inventors: 石光洲; 周伟
Original assignee: Zhenjiang Sinowa Polyurethane Equipment Co ltd
Current assignee: Zhenjiang Sinowa Polyurethane Equipment Co ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-08-21

Abstract

The invention discloses a multi-component foaming machine system for a sandwich board production line, which comprises a transverse mixing pipe, wherein the mixing pipe consists of an injection section, a contraction section, a throat part and an expansion section, a black material feeding hole is formed in the lower part of the injection section, an injection head is arranged in the injection section, a main body of the injection head sequentially comprises a white material injection channel, a first mixing cavity, a central hole and a second mixing cavity which are communicated with each other from front to back, the diameter of the rear part of the first mixing cavity is gradually reduced, and the diameter of the front part of the second mixing cavity is gradually increased; the circumference of the front part of the white material injection channel is provided with a foaming agent feeding cavity, the circumference of the rear part of the white material injection channel is provided with more than 6 foaming agent injection pore channels in a surrounding manner, the front ends of the foaming agent injection pore channels are communicated with the foaming agent feeding cavity, and the rear ends of the foaming agent injection pore channels are communicated with the first mixing cavity; the upper and lower sides of the central hole are symmetrically provided with an upper injection channel and a lower injection channel, the rear ends of the upper and lower injection channels are symmetrically distributed in a splayed shape and are communicated with the second mixing cavity, and the system enables black materials, white materials and foaming agents to be fully mixed.

Description

Multi-component foaming machine system for sandwich board production line

Technical Field

The invention relates to a multi-component foaming machine system for a sandwich board production line.

Background

As is well known, in the field of buildings, a large number of exterior wall external thermal insulation materials are continuously available for realizing emission reduction and energy conservation, and particularly, phenolic aldehyde and polyurethane boards are widely applied to exterior walls of buildings due to good thermal insulation performance, good physical stability and cost performance of the phenolic aldehyde and polyurethane boards. At present, main raw materials for production generally comprise a black material, a white material (formed by mixing a combined polyether polyol, a catalyst, silicone oil, a flame retardant and a foam stabilizer) and a foaming agent, the main raw materials are injected into a mold through an injection gun head of a high-pressure foaming machine, under a certain temperature condition, polyisocyanate (isocyanate (-NCO)) and combined polyether (hydroxyl (-OH)) are subjected to chemical reaction under the action of the catalyst to generate polyurethane, and a large amount of heat is released at the same time.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provides a multi-component foaming machine system for a sandwich board production line.

The technical scheme is as follows: the invention provides a multi-component foaming machine system for a sandwich board production line, which comprises a transverse mixing pipe, a black material storage tank, a foaming agent storage tank and a white material storage tank, wherein the mixing pipe consists of a spraying section, a contraction section, a throat part and an expansion section which are communicated in sequence from front to back; the periphery of the front part of the white material injection channel is provided with a foaming agent feeding cavity, the periphery of the rear part of the white material injection channel is provided with more than 6 foaming agent injection pore channels in a surrounding manner, the front ends of the foaming agent injection pore channels are communicated with the foaming agent feeding cavity, and the rear ends of the foaming agent injection pore channels are communicated with the first mixing cavity; the upper side and the lower side of the central hole are symmetrically provided with an upper injection channel and a lower injection channel, the front ends of the upper injection channel and the lower injection channel are communicated with the first mixing cavity and respectively correspond to one foaming agent injection pore channel in the foaming agent injection pore channels, and the rear ends of the upper injection channel and the lower injection channel are symmetrically distributed in a splayed shape and are communicated with the second mixing cavity; the foaming agent storage tank is connected with a foaming agent feeding cavity through a foaming agent high-pressure pump.

Preferably, a black material mass flowmeter is further arranged between the black material storage tank and the black material high-pressure pump, a white material mass flowmeter is further arranged between the white material storage tank and the white material high-pressure pump, and a foaming agent mass flowmeter is further arranged between the foaming agent storage tank and the foaming agent high-pressure pump.

Preferably, the contraction section and the expansion section are of a revolution body structure.

Preferably, the spray head is arranged coaxially with the spray section.

Preferably, the wall of the mixing pipe is of a sandwich structure.

Preferably, the blowing agent feeding cavity is an annular cavity.

Has the advantages that: according to the invention, white materials and foaming agents are premixed in the injection head, the foaming agents enter the first mixing cavity through 8 foaming agent injection pore passages circumferentially arranged, the input fluid of the foaming agents is changed from single-point input to multi-point input, in addition, the foaming agents and the white materials entering the first mixing cavity are sprayed out at high speed through the central hole due to the fact that the diameter of the rear part of the first mixing cavity is gradually reduced and the diameter of the second mixing cavity is gradually increased, the foaming agents and the white materials are fully mixed, then the white materials and the foaming agents are blown into fan surfaces under the action of the upper injection channel and the lower injection channel on two sides, the coverage area of the mixing pipe sprayed by the white materials and the foaming agents is increased, the white materials and the foaming agents are suddenly diffused after entering the throat part of the mixing pipe, and the black.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view a-a of fig. 1.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

Referring to fig. 1, a multi-component foaming machine system for a sandwich board production line comprises a transverse mixing pipe 1, a black material storage tank 2, a foaming agent storage tank 3 and a white material storage tank 4, wherein the mixing pipe 1 consists of a spraying section 111, a contraction section 112, a throat 113 and an expansion section 114 which are communicated with each other from front to back in sequence, and preferably, the contraction section 112 and the expansion section 114 are of a revolving body structure; the lower part of the jetting section 111 is provided with a black material feeding hole 115, a jetting head is arranged in the jetting section, preferably, the jetting head and the jetting section are coaxially arranged, a main body of the jetting head sequentially comprises a white material jetting channel 11, a first mixing cavity 12, a central hole 13 and a second mixing cavity 14 which are communicated with each other from front to back, the diameter of the rear part of the first mixing cavity 12 is gradually reduced, and the diameter of the front part of the second mixing cavity 14 is gradually increased; the circumference of the front part of the white material injection channel 11 is provided with a foaming agent feeding cavity 15, the circumference of the rear part is provided with 8 foaming agent injection pore channels 16 in a surrounding way, the front ends of the foaming agent injection pore channels 16 are communicated with the foaming agent feeding cavity, and the rear ends of the foaming agent injection pore channels 16 are communicated with the first mixing cavity 12; the upper side and the lower side of the central hole are symmetrically provided with an upper injection channel 17 and a lower injection channel 18, the front ends of the upper injection channel and the lower injection channel are communicated with the first mixing cavity 12 and respectively correspond to one foaming agent injection pore channel in the foaming agent injection pore channel, and the rear ends of the upper injection channel and the lower injection channel are symmetrically distributed in a splayed shape and are communicated with the second mixing cavity 14; the black material storage tank 2 is connected with a black material feeding hole 115 through a black material high-pressure pump, the white material storage tank 4 is connected with the white material injection channel 11 through a white material high-pressure pump, and the foaming agent storage tank 4 is connected with a foaming agent feeding cavity 15 through a foaming agent high-pressure pump. Preferably, a black material mass flow meter 5 is further arranged between the black material storage tank 2 and the black material high-pressure pump, a white material mass flow meter 6 is further arranged between the white material storage tank 4 and the white material high-pressure pump, and a foaming agent mass flow meter 7 is further arranged between the foaming agent storage tank 3 and the foaming agent high-pressure pump.

In order to realize the temperature control of the mixing pipe, preferably, the pipe wall of the mixing pipe is of a sandwich structure. Preferably, the blowing agent feeding cavity is an annular cavity.

The outlet of the spray head consists of three circular holes with different diameters, wherein the foaming agent is sprayed out from the circular holes at two sides at high speed and is converged at the front end of the spray head to form strong convection airflow, and the premixed white material and the foaming agent sprayed out from the central hole instantaneously change the shape under the action of the strong convection airflow and change the solid cone shape into a sector.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A multi-component foaming machine system for a sandwich board production line is characterized by comprising a transverse mixing pipe, a black material storage tank, a foaming agent storage tank and a white material storage tank, wherein the mixing pipe sequentially consists of a spraying section, a contraction section, a throat part and an expansion section which are communicated from front to back; the periphery of the front part of the white material injection channel is provided with a foaming agent feeding cavity, the periphery of the rear part of the white material injection channel is provided with more than 6 foaming agent injection pore channels in a surrounding manner, the front ends of the foaming agent injection pore channels are communicated with the foaming agent feeding cavity, and the rear ends of the foaming agent injection pore channels are communicated with the first mixing cavity; the upper side and the lower side of the central hole are symmetrically provided with an upper injection channel and a lower injection channel, the front ends of the upper injection channel and the lower injection channel are communicated with the first mixing cavity and respectively correspond to one foaming agent injection pore channel in the foaming agent injection pore channels, and the rear ends of the upper injection channel and the lower injection channel are symmetrically distributed in a splayed shape and are communicated with the second mixing cavity; the foaming agent storage tank is connected with a foaming agent feeding cavity through a foaming agent high-pressure pump.

2. The multi-component foaming machine system for the sandwich board production line according to claim 1, wherein a black material mass flow meter is further arranged between the black material storage tank and the black material high-pressure pump, a white material mass flow meter is further arranged between the white material storage tank and the white material high-pressure pump, and a foaming agent mass flow meter is further arranged between the foaming agent storage tank and the foaming agent high-pressure pump.

3. The multi-component foaming machine system for a sandwich panel production line according to claim 1, wherein the wall of the mixing pipe is of a sandwich structure.

4. The multi-component foam maker system for a sandwich panel production line as claimed in claim 1, wherein the spray head is disposed coaxially with the spray section.

5. The system of claim 1, wherein the contracting section and the expanding section are of a revolving structure.

6. The system of claim 1, wherein the blowing agent feed chamber is an annular chamber.