CN211807399U - Polyurethane mixed foaming pouring system - Google Patents
Polyurethane mixed foaming pouring system Download PDFInfo
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- CN211807399U CN211807399U CN201922127676.8U CN201922127676U CN211807399U CN 211807399 U CN211807399 U CN 211807399U CN 201922127676 U CN201922127676 U CN 201922127676U CN 211807399 U CN211807399 U CN 211807399U
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Abstract
The utility model discloses a polyurethane hybrid foam gating system, include: the two storage tanks are respectively a first storage tank and a second storage tank and are respectively used for containing foaming raw materials; the high-pressure mixing nozzle is provided with a first feeding structure and a second feeding structure; the first feeding structure is of a three-way pipe structure and is respectively connected with a discharge pipeline of the first storage tank, a return pipeline of the first storage tank and the high-pressure mixing sprayer, a pump is arranged on the discharge pipeline of the first storage tank, and a valve is arranged on the return pipeline of the first storage tank; the second feeding structure is of a three-way pipe structure and is respectively connected with a discharge pipeline of the second storage tank, a return pipeline of the second storage tank and the high-pressure mixing sprayer, a pump is arranged on the discharge pipeline of the second storage tank, and a valve is arranged on the return pipeline of the second storage tank.
Description
Technical Field
The utility model relates to a polyurethane mixing foaming pouring technical field, concretely relates to polyurethane mixing foaming gating system.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
The polyurethane high-pressure foaming gun is a foaming forming device which mixes two polyurethane raw materials in proportion and injects the mixture into a sealed container, the polyurethane raw materials are realized by two high-pressure plunger pumps (the highest FF) with adjustable output quantity, the flow of the high-pressure plunger pumps is realized by manually adjusting the eccentricity of the pumps, the flow of the mixed raw materials is monitored by a precision flowmeter, and the mixing proportion of different raw materials entering a raw material mixing cavity is controlled.
In the pouring process, the pressure when the mould is poured is about 5.0Mpa, and when one mould is poured each time, the pouring pressure is reduced to zero, and the pressure drop is about 5.0 Mpa. Partial foaming agent is analyzed out due to pressure drop of white materials (polyurethane hard foam combined polyether) at the mixing head, so that the proportion of two polyurethane raw materials is disordered, and when the next pouring is carried out, a product has a shrinkage pit, so that the product quality is unqualified.
Secondly, according to the technical requirements of the materials, the pouring temperature of the material A (polyurethane rigid foam combined polyether) is not lower than 20 ℃, and the pouring temperature of the material B is not lower than 30 ℃. Two kinds of raw materials are carried to high pressure mixing head mix casting mould by the plunger pump, and after having poured a mould at every turn, need suitably pause and carry out the pouring of next time again, pause the in-process and can cause the cooling of material in the pipeline, lead to this part material to be difficult to satisfy the pouring requirement, influence product quality.
Disclosure of Invention
In order to solve the technical problem existing in the prior art, the utility model aims at providing a polyurethane mixing foaming casting system.
In order to solve the technical problem, the technical scheme of the utility model is that:
a polyurethane hybrid foam casting system comprising:
the two storage tanks are respectively a first storage tank and a second storage tank and are respectively used for containing foaming raw materials;
the high-pressure mixing nozzle is provided with a first feeding structure and a second feeding structure;
the first feeding structure is of a three-way pipe structure and is respectively connected with a discharge pipeline of the first storage tank, a return pipeline of the first storage tank and the high-pressure mixing sprayer, a pump is arranged on the discharge pipeline of the first storage tank, and a valve is arranged on the return pipeline of the first storage tank;
the second feeding structure is of a three-way pipe structure and is respectively connected with a discharge pipeline of the second storage tank, a return pipeline of the second storage tank and the high-pressure mixing sprayer, a pump is arranged on the discharge pipeline of the second storage tank, and a valve is arranged on the return pipeline of the second storage tank.
The high-pressure mixing nozzle is a conventional polyurethane high-pressure mixing nozzle, and is in a working state during normal foaming and pouring, the two materials are respectively pumped to the high-pressure mixing nozzle in proportion through the first pump and the second pump, and are mixed and then foamed and sprayed. After once pouring accomplished, the mixed shower nozzle stop work of high pressure, open the valve on two material returning pipelines, at this moment, the polyurethane raw materials that deliver through first pump and second pump can be through another opening of tee bend tubular structure and deliver first storage tank and second storage tank back through material returning pipeline, make the polyurethane raw materials be in the circulation state, can prevent effectively that the raw materials dwell time overlength in the pipeline from causing the temperature to reduce, influence the product quality of pouring.
In addition, the raw materials to the high-pressure mixing nozzle are pumped circularly, so that the problems of precipitation of foaming agent and the like caused by sudden pressure drop of the raw materials in partial pipelines and feeding structures during shutdown can be effectively solved, the accuracy of the ratio among the foaming raw materials can be ensured, and the quality of the product is guaranteed.
In some embodiments, a first switch is disposed on the return line of the first tank and a second switch is disposed on the return line of the second tank. The conversion machine closes the feed back valve when the conversion machine is operated to inject the material, opens the discharge valve, and after the injection is finished, the feed back valve is opened and closes the discharge valve at the same time, so that the material enters a continuous circulation state.
In some embodiments, the pump is a plunger pump.
Furthermore, the plunger pump is a two-channel plunger pump, and the discharge pipeline of the first storage tank and the discharge pipeline of the second storage tank are both connected with the plunger pump.
In some embodiments, the return line of the first storage tank is connected to the bottom of the first storage tank.
In some embodiments, the return line of the second storage tank is connected to the bottom of the second storage tank.
The material returning pipeline is connected with the bottom of the storage tank, and the material circulating back to the storage tank returns from the bottom of the storage tank, so that the material after being cooled is favorably and uniformly mixed with the material in the storage tank.
The utility model has the advantages that:
after the pouring is accomplished, the high-pressure mixed nozzle stops working, opens the valve on two return lines, and the polyurethane raw materials that first pump and second pump were carried can be passed through return line and are carried back first storage tank and second storage tank through another opening of tee bend tubular structure, makes the polyurethane raw materials be in the circulation state, can prevent effectively that the raw materials dwell time overlength in the pipeline from causing the temperature reduction, influences the product quality of pouring.
The raw materials to the high-pressure mixing nozzle are circularly pumped, the problems of the separation of foaming agent and the like caused by sudden pressure drop of the raw materials in partial pipelines and feeding structures during shutdown can be effectively solved, the accuracy of the ratio among the foaming raw materials can be ensured, and the quality of the product is guaranteed.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic structural view of a polyurethane hybrid foam casting system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a high-pressure mixing nozzle according to an embodiment of the present invention;
in the figure, 1, a first storage tank, 2, a first pump, 3, a valve, 4, a first feeding structure, 5, a high-pressure mixing spray head, 6, a second pump, 7, a second storage tank, 8, a first conversion machine, 9, a second conversion machine, 10 and a second feeding structure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1, a polyurethane hybrid foam casting system includes: the two storage tanks are respectively a first storage tank and a second storage tank and are respectively used for containing foaming raw materials; the high-pressure mixing nozzle is provided with a first feeding structure 4 and a second feeding structure 10; the first feeding structure 4 is a three-way pipe structure (as shown in fig. 2), and is respectively connected with a discharge pipeline of the first storage tank, a return pipeline of the first storage tank and a high-pressure mixing nozzle (specification model: GZ-30).
The connection, set up the pump on the discharging pipeline of first storage tank, set up valve and first conversion machine on the return line of first storage tank, the return line is connected with the bottom of first storage tank.
The pump is a plunger pump, the plunger pump is a two-channel plunger pump, and the discharge pipeline of the first storage tank and the discharge pipeline of the second storage tank are both connected with the plunger pump.
The high-pressure mixing nozzle is a conventional polyurethane high-pressure mixing nozzle, and is in a working state during normal foaming and pouring, the two materials are respectively pumped to the high-pressure mixing nozzle in proportion through the first pump and the second pump, and are mixed and then foamed and sprayed. After once pouring accomplished, the mixed shower nozzle stop work of high pressure, open the valve on two material returning pipelines, at this moment, the polyurethane raw materials that deliver through first pump and second pump can be through another opening of tee bend tubular structure and deliver first storage tank and second storage tank back through material returning pipeline, make the polyurethane raw materials be in the circulation state, can prevent effectively that the raw materials dwell time overlength in the pipeline from causing the temperature to reduce, influence the product quality of pouring.
In addition, the raw materials to the high-pressure mixing nozzle are pumped circularly, so that the problems of precipitation of foaming agent and the like caused by sudden pressure drop of the raw materials in partial pipelines and feeding structures during shutdown can be effectively solved, the accuracy of the ratio among the foaming raw materials can be ensured, and the quality of the product is guaranteed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A polyurethane hybrid foaming casting system is characterized in that: the method comprises the following steps:
the two storage tanks are respectively a first storage tank and a second storage tank and are respectively used for containing foaming raw materials;
the high-pressure mixing nozzle is provided with a first feeding structure and a second feeding structure;
the first feeding structure is of a three-way pipe structure and is respectively connected with a discharge pipeline of the first storage tank, a return pipeline of the first storage tank and the high-pressure mixing sprayer, a pump is arranged on the discharge pipeline of the first storage tank, and a valve is arranged on the return pipeline of the first storage tank;
the second feeding structure is of a three-way pipe structure and is respectively connected with a discharge pipeline of the second storage tank, a return pipeline of the second storage tank and the high-pressure mixing sprayer, a pump is arranged on the discharge pipeline of the second storage tank, and a valve is arranged on the return pipeline of the second storage tank.
2. The polyurethane hybrid foam runner system of claim 1, wherein: a first conversion machine is arranged on the material returning line of the first storage tank, and a second conversion machine is arranged on the material returning line of the second storage tank.
3. The polyurethane hybrid foam runner system of claim 1, wherein: the pump is a plunger pump.
4. The polyurethane hybrid foam runner system of claim 3, wherein: the plunger pump is a two-channel plunger pump, and the discharge pipeline of the first storage tank and the discharge pipeline of the second storage tank are both connected with the plunger pump.
5. The polyurethane hybrid foam runner system of claim 1, wherein: the material returning pipeline of the first storage tank is connected with the bottom of the first storage tank.
6. The polyurethane hybrid foam runner system of claim 1, wherein: and a material returning pipeline of the second storage tank is connected with the bottom of the second storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922127676.8U CN211807399U (en) | 2019-11-28 | 2019-11-28 | Polyurethane mixed foaming pouring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922127676.8U CN211807399U (en) | 2019-11-28 | 2019-11-28 | Polyurethane mixed foaming pouring system |
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| Publication Number | Publication Date |
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| CN211807399U true CN211807399U (en) | 2020-10-30 |
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| CN201922127676.8U Active CN211807399U (en) | 2019-11-28 | 2019-11-28 | Polyurethane mixed foaming pouring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114872259A (en) * | 2022-05-20 | 2022-08-09 | 长虹美菱股份有限公司 | Refrigerator cabinet foaming machine front tank system with cleaning function and cleaning method |
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2019
- 2019-11-28 CN CN201922127676.8U patent/CN211807399U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114872259A (en) * | 2022-05-20 | 2022-08-09 | 长虹美菱股份有限公司 | Refrigerator cabinet foaming machine front tank system with cleaning function and cleaning method |
| CN114872259B (en) * | 2022-05-20 | 2024-02-06 | 长虹美菱股份有限公司 | Refrigerator cabinet foaming machine front tank system with cleaning function and cleaning method |
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