A polyurethane bulk foam manufacturing device

Abstract

This utility model relates to the field of polyurethane foam production technology, and discloses a polyurethane bulk foam production device, including a base. A support is fixedly connected to the upper surface of the base. A vibration structure is fixedly connected to the center of the lower inner wall of the support. A lower mold is provided at the upper end of the vibration structure. The vibration structure includes multiple four Liwa shock absorbers, which are respectively arranged on the lower inner wall of the support at four opposite corners of the lower end of the lower mold. A striking block is fixedly connected to the center of the lower end face of the lower mold. A servo motor is fixedly connected to the lower inner wall of the support on one side of the striking block. A cam for contacting the striking block to generate vibration is fixedly connected to the output end of the servo motor. In this utility model, vibration promotes the flow and mixing of raw materials, effectively reducing the density difference inside the foam, making the performance of various parts of the product more consistent. The vibration breaks up the bubble aggregation phenomenon, making the bubble distribution more uniform and the cell structure more regular.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane foam production technology, and in particular to a device for producing large-scale polyurethane foam. Background Technology

[0002] Polyurethane is an important class of polymer materials, produced by the polymerization reaction of polyols and isocyanates. Due to its unique molecular structure and diverse formulations, polyurethane materials have a wide range of applications and excellent performance. Polyurethane bulk foam is a polymer material produced by chemical reaction, which has excellent properties such as lightweight, heat insulation, sound insulation and shock absorption. It is widely used in construction, furniture, automobiles, packaging and other fields. Equipment used to produce polyurethane bulk foam is an indispensable piece of equipment.

[0003] Some problems still exist in the use of existing polyurethane bulk foam production equipment. Traditional processes often result in excessively large cells, excessively high closed-cell ratios, or unstable open-cell structures, as well as localized high-density or low-density areas. Therefore, those skilled in the art have provided a polyurethane bulk foam production equipment to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a polyurethane bulk foam manufacturing device. Vibration promotes the flow and mixing of raw materials, effectively reducing density differences within the foam and making the performance of each part of the product more consistent. The vibration-induced breaking of bubble aggregation makes the bubble distribution more uniform and the cell structure more regular.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a polyurethane bulk foam manufacturing device, comprising a base, a support fixedly connected to the upper end face of the base, a vibration structure fixedly connected to the center of the lower inner wall of the support, and a lower mold provided at the upper end of the vibration structure;

[0006] The vibration structure includes multiple four Liwa shock absorbers. The four Liwa shock absorbers are respectively installed on the lower inner wall of the bracket at the four opposite corners of the lower end of the lower mold. A striking block is fixedly connected to the center of the lower end face of the lower mold. A servo motor is fixedly connected to the lower inner wall of the bracket on one side of the striking block. A cam for contacting the striking block to generate vibration is fixedly connected to the output end of the servo motor.

[0007] The lower mold is provided with a pressure cap at its upper end;

[0008] Through the above technical solution, the servo motor is started, which drives the cam to rotate. The cam's protruding part strikes the striking block, and the resulting vibration is transmitted to the lower mold, making the polyurethane raw material inside the lower mold more evenly distributed and mixed. The vibration promotes the flow and mixing of the raw material, effectively reducing the density difference inside the foam, making the performance of each part of the product more consistent. The vibration breaks the bubble aggregation phenomenon, making the bubble distribution more uniform and the cell structure more regular.

[0009] Furthermore, the outer side wall of the lower mold is provided with multiple buckles at the upper part, and hooks are fixedly connected to the lower part of the outer side wall of the upper end cover of the multiple buckles. The outer side hanging rods of the multiple buckles are respectively hung on the multiple hooks.

[0010] The above technical solution facilitates the limiting of the cap by hanging it on multiple hooks via multiple outer hooks.

[0011] Furthermore, an air outlet and an air inlet are respectively provided at the center of the front and rear end faces of the bracket, and an air exchange structure is provided between the air outlet and the air inlet. The air exchange structure includes two heat-conducting rubber seats, which are respectively disposed inside the lower end brackets of the two lower molds. Multiple hexagonal holes are provided at the center of the front end face of the two lower molds.

[0012] Through the above technical solution, the heat generated or the heat that needs to be absorbed during the polyurethane foaming process will transfer heat to or absorb heat from the two thermally conductive rubber seats.

[0013] Furthermore, multiple ventilation fans are arranged horizontally at the front of the air outlet.

[0014] The above technical solution uses multiple ventilation fans to provide airflow, quickly removing heat or low temperatures from the two heat-conducting rubber bases.

[0015] Furthermore, dustproof nets are provided at the front part of the air outlet and the rear part of the air inlet;

[0016] The above technical solutions prevent dust from affecting the use of the ventilation fan.

[0017] Furthermore, lifting rods are fixedly connected to both ends of the upper surface of the cover at the front and rear ends;

[0018] The above technical solution makes it easy to lift the pressure cap using a lifting rod.

[0019] Furthermore, a control box is provided on one side of the base;

[0020] The above technical solution facilitates integrated control via a control box.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the polyurethane bulk foam making device starts the servo motor, which drives the cam to rotate. The cam's protruding part strikes the striking block, and the resulting vibration is transmitted to the lower mold, making the polyurethane raw material inside the lower mold more evenly distributed and mixed. The vibration promotes the flow and mixing of the raw material, effectively reducing the density difference inside the foam, making the performance of each part of the product more consistent. The vibration breaks the bubble aggregation phenomenon, making the bubble distribution more uniform and the cell structure more regular.

[0023] 2. In this utility model, by controlling the start of multiple ventilation fans, the heat generated or the heat that needs to be absorbed during the polyurethane foaming process will transfer heat to or absorb the heat of the two heat-conducting rubber seats. Then, the multiple ventilation fans are started, and the multiple ventilation fans draw out the air inside the multiple hexagonal holes, so that the air inside the hexagonal holes can circulate with the outside air, avoiding uneven reaction rates caused by temperature gradients and improving production quality. Attached Figure Description

[0024] Figure 1 This is a perspective view of a polyurethane bulk foam manufacturing device proposed in this utility model.

[0025] Figure 2 This is a three-dimensional sectional view of a polyurethane bulk foam manufacturing device proposed in this utility model.

[0026] Figure 3 This is a three-dimensional exploded view of a polyurethane bulk foam manufacturing device proposed in this utility model;

[0027] Figure 4 for Figure 2 Enlarged diagram of point A in the middle.

[0028] Legend:

[0029] 1. Base; 2. Ventilation structure; 3. Support; 4. Lifting rod; 5. Pressure cap; 6. Lower mold; 7. Hook; 8. Buckle; 9. Air vent; 10. Vibration structure; 11. Air inlet;

[0030] 201. Thermally conductive rubber base; 202. Hexagonal hole; 203. Exhaust fan; 204. Dust filter;

[0031] 1001, Liva shock absorber; 1002, servo motor; 1003, cam; 1004, striking block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1-4 One embodiment of this utility model is a polyurethane bulk foam manufacturing device, which includes a base 1, a support 3 fixedly connected to the upper end face of the base 1, a vibration structure 10 fixedly connected to the center of the lower inner wall of the support 3, and a lower mold 6 provided at the upper end of the vibration structure 10.

[0034] like Figure 1 , 2 As shown in Figures 3 and 4, the vibration structure 10 includes multiple four Liwa shock absorbers 1001. The four Liwa shock absorbers 1001 are respectively installed on the lower inner wall of the bracket 3 at the four diagonal corners of the lower end of the lower mold 6. A striking block 1004 is fixedly connected to the center of the lower end face of the lower mold 6. A servo motor 1002 is fixedly connected to the lower inner wall of the bracket 3 on one side of the striking block 1004. A cam 1003 for contacting the striking block 1004 to generate vibration is fixedly connected to the output end of the servo motor 1002.

[0035] The lower mold 6 has a pressure cap 5 on its upper end. When the servo motor 1002 is started, the servo motor 1002 drives the cam 1003 to rotate. The protruding part of the cam 1003 strikes the striking block 1004, and the resulting vibration is transmitted to the lower mold 6, so that the polyurethane raw material inside the lower mold 6 is more evenly distributed and mixed. The vibration promotes the flow and mixing of the raw material, effectively reducing the density difference inside the foam, making the performance of each part of the product more consistent. The vibration breaks the bubble aggregation phenomenon, making the bubble distribution more uniform and the cell structure more regular.

[0036] like Figure 1 , 2 As shown in Figure 3, multiple buckles 8 are provided on the upper part of the outer side wall of the lower mold 6. Hooks 7 are fixedly connected to the lower part of the outer side wall of the upper end of the multiple buckles 8 and the outer side hanging rods of the multiple buckles 8 are respectively hung on the multiple hooks 7, so as to limit the pressure cover 5 by hanging the outer side hanging rods of the multiple buckles 8 on the multiple hooks 7.

[0037] like Figure 1 , 2As shown in Figure 3, an air outlet 9 and an air inlet 11 are respectively opened at the center of the front and rear end faces of the bracket 3. An air exchange structure 2 is provided between the air outlet 9 and the air inlet 11. The air exchange structure 2 includes two heat-conducting rubber seats 201. The two heat-conducting rubber seats 201 are respectively set inside the lower end bracket 3 of the two lower molds 6. Multiple hexagonal holes 202 are opened at the center of the front end face of the two lower molds 6. The heat generated or the heat that needs to be absorbed during the polyurethane foaming process will transfer heat to or absorb the heat of the two heat-conducting rubber seats 201.

[0038] Multiple ventilation fans 203 are arranged horizontally at the front of the air outlet 9. The multiple ventilation fans 203 provide airflow to quickly remove the heat or low temperature from the two heat-conducting rubber seats 201.

[0039] Dust filters 204 are provided at the front of the air outlet 9 and at the rear of the air inlet 11 to prevent dust from affecting the use of the ventilation fan 203.

[0040] Lifting rods 4 are fixedly connected to both ends of the upper surface of the cover 5, making it easy to lift the cover 5 by lifting rods 4.

[0041] A control box is provided on one side of the base 1, which facilitates integrated control. The control box also includes a wireless transmission module for remotely controlling the start of multiple ventilation fans 203 and servo motors 1002. This is a common technical means in existing control systems, and will not be elaborated on here.

[0042] Working principle: During use, raw materials are fed into the lower mold 6, and the cap 5 is placed on the lower mold 6 by the lifting rod 4. The cap 5 is limited by multiple hooks 8 hanging on multiple hooks 7. The servo motor 1002 is started, and the servo motor 1002 drives the cam 1003 to rotate. The protruding part of the cam 1003 strikes the striking block 1004. The resulting vibration is transmitted to the lower mold 6, which makes the polyurethane raw materials inside the lower mold 6 more evenly distributed and mixed. The vibration promotes the flow and mixing of raw materials, effectively reduces the density difference inside the foam, and makes the performance of each part of the product more consistent. The vibration breaks the bubble aggregation phenomenon, making the bubble distribution more uniform and the cell structure more regular.

[0043] Then, by controlling the start of multiple ventilation fans 203, the heat generated or the heat that needs to be absorbed during the polyurethane foaming process will transfer heat to or absorb the heat of the two heat-conducting rubber seats 201. Then, the multiple ventilation fans 203 are started, and the multiple ventilation fans 203 extract the air from the multiple hexagonal holes 202, so that the air inside the hexagonal holes 202 can circulate with the outside air, avoid the uneven reaction rate caused by temperature gradient, and improve production quality.

[0044] The control box also includes a wireless transmission module for remotely controlling the start of multiple ventilation fans 203 and servo motors 1002. This is a common technique in existing control systems and will not be elaborated on here.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polyurethane bulk foam manufacturing device, comprising a base (1), characterized in that: A bracket (3) is fixedly connected to the upper end face of the base (1), and a vibration structure (10) is fixedly connected to the center of the lower inner wall of the bracket (3). A lower mold (6) is provided at the upper end of the vibration structure (10). The vibration structure (10) includes multiple four Liwa shock absorbers (1001). The four Liwa shock absorbers (1001) are respectively installed on the lower inner wall of the bracket (3) at the four diagonal corners of the lower end of the lower mold (6). A striking block (1004) is fixedly connected to the center of the lower end face of the lower mold (6). A servo motor (1002) is fixedly connected to the lower inner wall of the bracket (3) on one side of the striking block (1004). A cam (1003) for contacting the striking block (1004) to generate vibration is fixedly connected to the output end of the servo motor (1002). The lower mold (6) is provided with a pressure cap (5) at its upper end.

2. The polyurethane bulk foam manufacturing device according to claim 1, characterized in that: The lower mold (6) has multiple buckles (8) on the upper side of its outer side wall. Hooks (7) are fixedly connected to the lower side of the outer side wall of the upper end cover (5) of the multiple buckles (8). The outer side hanging rods of the multiple buckles (8) are respectively hung on the multiple hooks (7).

3. The polyurethane bulk foam manufacturing device according to claim 1, characterized in that: The support (3) has an air outlet (9) and an air inlet (11) at the center of its front and rear end faces respectively. An air exchange structure (2) is provided between the air outlet (9) and the air inlet (11). The air exchange structure (2) includes two heat-conducting rubber seats (201). The two heat-conducting rubber seats (201) are respectively set inside the lower end support (3) of the two lower molds (6). Multiple hexagonal holes (202) are opened at the center of the front end face of the two lower molds (6).

4. The polyurethane bulk foam manufacturing device according to claim 3, characterized in that: Multiple ventilation fans (203) are arranged horizontally at the front of the air outlet (9).

5. The polyurethane bulk foam manufacturing apparatus according to claim 3, characterized in that: Dustproof nets (204) are provided at the front of the air outlet (9) and at the rear of the air inlet (11).

6. The polyurethane bulk foam manufacturing apparatus according to claim 1, characterized in that: Lifting rods (4) are fixedly connected to both ends of the upper surface of the cover (5).

7. The polyurethane bulk foam manufacturing apparatus according to claim 1, characterized in that: A control box is provided on one side of the base (1).

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