Polyurethane foaming equipment

Abstract

The invention relates to the field of foaming equipment, in particular to polyurethane foaming equipment, according to the technical scheme, the polyurethane foaming equipment comprises a base, a material tank arranged on the base and a mixing chamber arranged on the base, a discharging pipe connected with the material tank is arranged on the mixing chamber, a first metering pump is arranged on the discharging pipe, a high-pressure pump is further arranged on the discharging pipe, and a second metering pump is arranged on the high-pressure pump. The material tank is provided with a rotating shaft in the height direction, the upper end of the rotating shaft is provided with a rotating disc located at the feeding end of the material tank, the top face of the rotating disc is spirally provided with a dividing plate, and the rotating shaft is provided with a stirring assembly located in the material tank and located below the rotating disc. The device has the effects of improving the raw material mixing efficiency and improving the foaming quality.

Description

Technical Field

[0001] The present application relates to the field of foaming equipment, and in particular to a polyurethane foaming equipment. Background Art

[0002] Polyurethane materials are widely used in automotive interiors, thermal insulation wall spraying, thermal insulation pipe manufacturing, cushion sponge processing, etc. Polyurethane foaming machines are mainly special equipment for polyurethane foam plastic infusion foaming. Polyurethane foaming machines need to make the polyurethane component raw materials reach performance indicators. When the existing polyurethane foaming machine is used, the raw materials need to be added to the A container and the B container of the foaming machine respectively. According to the formula process of the polyurethane material, the material flow rate of the A container and the B container needs to be set, and the material temperature needs to be adjusted to the specified temperature value. Then, the A and B groups of raw materials are transferred to the mixing chamber of the foaming machine by a high-pressure pump. After high-pressure instant mixing, the raw materials are injected into the corresponding container through the injection gun head. However, due to the different quality and density of the raw materials, when mixing the raw materials in the A container or the B container, the raw materials with larger mass are easy to accumulate at the bottom, resulting in poor mixing effect of the A and B groups of raw materials in the mixing chamber of the foaming machine, affecting the foaming quality of the foaming machine. Summary of the invention

[0003] In order to improve the raw material mixing efficiency and improve the foaming quality, the present application provides a polyurethane foaming equipment.

[0004] The present application provides a polyurethane foaming device, which adopts the following technical solution: A polyurethane foaming device comprises a base, a material tank arranged on the base and a mixing chamber arranged on the base, the mixing chamber is provided with a discharge pipe connected to the material tank, the discharge pipe is provided with a metering pump, the discharge pipe is also provided with a high-pressure pump, the material tank is provided with a rotating shaft along the height direction, the upper end of the rotating shaft is provided with a rotating disk located at the feeding end of the material tank, the top surface of the rotating disk is spirally provided with a dividing plate, and the rotating shaft is provided with a stirring component located in the material tank and below the rotating disk.

[0005] By adopting the above technical scheme, the base is used to position the material tank and the mixing chamber, the material tank is used to store raw materials, and multiple groups of material tanks can be set as needed. The mixing chamber is convenient for high-pressure mixing of materials in the material tank to form bubbles. The discharge pipe is used for the material tank to transport materials into the mixing chamber. The metering pump is used to control the discharge amount of the discharge pipe. The high-pressure pump is used to speed up the material transportation efficiency. The rotating shaft drives the rotating disk to rotate, and the rotation of the rotating disk drives the dividing plate to rotate. The dividing plate rotates to mix the materials in the material tank. The stirring assembly is used to mix and stir the materials mixed by the dividing plate, thereby reducing the possibility of material settling to the bottom of the material tank, facilitating subsequent high-pressure foaming, and improving the foaming quality.

[0006] Preferably, a plurality of feed pipes are provided on the top surface of the material tank, the discharge ends of the feed pipes are located above the central area formed by the spiral dividing plate, a metering pump 2 is provided at the feed end of the feed pipe, and a control valve is provided on the feed pipe.

[0007] By adopting the above technical solution, the feed pipe is used for raw materials to enter the material tank, and the discharge end of the feed pipe is located in the central area of ​​the dividing plate spiral, which is convenient for the dividing plate to mix the raw materials. The second metering pump is used to control the amount of raw materials entering the material tank, and the control valve is used to control the feed pipe for material discharge.

[0008] Preferably, the material tank is provided with a heating element located at the discharge end of the feed pipe, the heating element comprises a mounting tube sleeved on the feed pipe and a heating wire arranged in the mounting tube, and the inner wall of the mounting tube is provided with a hollow interlayer for installing the heating wire.

[0009] By adopting the above technical solution, the heating element is used to heat the raw materials transmitted by the feed pipe, which is convenient for mixing various raw materials. The mounting tube is used to mount the heating wire one, and the heating wire one is located in the hollow interlayer one, thereby improving the stability of the heating wire one and facilitating the heating wire one to heat the raw materials in the feed pipe.

[0010] Preferably, a dispersion plate is spirally provided on the top surface of the rotating disk, and a plurality of dispersion grooves are obliquely provided on the side wall of the dispersion plate along the length direction.

[0011] By adopting the above technical solution, the dispersion plate will disperse and mix the raw materials conveyed into the material tank, making it convenient for the subsequent stirring component to stir and mix, thereby improving the mixing efficiency of the materials and reducing the possibility of the materials settling to the bottom of the material tank.

[0012] Preferably, the stirring assembly includes a plurality of stirring blades spirally arranged along the length direction of the rotating shaft and a plurality of flipping blades arranged at the lower end of the rotating shaft and located at the discharge end of the material tank, and the spiral directions of two adjacent stirring blades are opposite.

[0013] By adopting the above technical scheme, the stirring blades stir the mixed materials on the rotating disk, the spiral directions of adjacent stirring blades are opposite to improve the stirring efficiency of the stirring blades, the turning blades are used to turn over the raw materials in the material tank, turn over the raw materials at the bottom of the material tank upwards, and then the stirring blades stir the raw materials.

[0014] Preferably, the stirring blade is provided with a plurality of through grooves along the length direction, and the through grooves extend along the width direction of the stirring blade.

[0015] By adopting the above technical solution, a number of through grooves are opened on the stirring blade. The through grooves separate part of the raw materials when the stirring blade stirs the raw materials, thereby improving the stirring efficiency of the stirring blade on the raw materials. The through grooves extend along the width direction of the stirring blade to separate the raw materials and facilitate mixing of the raw materials on both sides of the stirring blade.

[0016] Preferably, the bottom surface of the flip leaf is in close contact with the inner bottom surface of the material tank, and the upper end of the flip leaf is bent toward the adjacent flip leaf.

[0017] By adopting the above technical solution, the bottom surface of the turning blade is in close contact with the inner bottom surface of the material tank. The turning blade drives the raw materials at the bottom of the material tank to stir when it rotates. The upper end of the turning blade is bent toward the adjacent turning blade, and the turning blade is used to turn the raw materials upward. The stirring blade will mix and stir the raw materials turned up by the turning blade, thereby reducing the possibility of sedimentation of the raw materials at the bottom of the material tank.

[0018] Preferably, a screening element is provided at the feed end of the discharge pipe, and the screening element includes a plurality of screening tubes arranged at one end of the discharge pipe close to the material tank, a plurality of dividing lines arranged inside the screening tubes, and positioning plates arranged at both ends of the plurality of screening tubes, wherein the positioning plates are provided with mounting holes for positioning the screening tubes.

[0019] By adopting the above technical scheme, after the raw materials are stirred and mixed, they need to be transferred to the mixing chamber for mixing to facilitate high-pressure foaming. The screening element is used to transfer the raw materials and screen a large number of bubbles generated in the raw materials due to stirring. Several screening tubes are used to separate the raw materials. The dividing line intercepts the bubbles generated by the stirring of the raw materials. The positioning plate is used to position several screening tubes to improve the stability of the screening tubes on the discharge pipe. The mounting holes are used to install and position the screening tubes.

[0020] Preferably, a plurality of the dividing lines are cross-arranged in the sieve tube.

[0021] By adopting the above technical solution, the dividing lines are cross-arranged in the sieve tube, which improves the fineness of the raw material stirring and facilitates the mixing chamber to mix the raw materials in other material tanks for high-pressure foaming.

[0022] Preferably, a second hollow interlayer is provided on the side wall of the material tank, and a second heating wire is spirally wound inside the second hollow interlayer.

[0023] By adopting the above technical solution, the second hollow interlayer is used to install the second heating wire, and the second heating wire heats and keeps the raw materials in the material tank warm.

[0024] In summary, the materials are rotated, mixed and broken up by the rotating disk and the dividing plate, thereby improving the stirring efficiency of the subsequent stirring assembly; the turning blades turn the raw materials at the bottom of the material tank, thereby reducing the possibility of the raw materials settling to the bottom of the material tank, and facilitating high-pressure foaming after subsequent mixing in the mixing chamber; the screening element is used to further improve the fineness of the raw materials, thereby facilitating high-pressure foaming in the mixing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a polyurethane foaming device of the present application; Figure 2 is a cross-sectional view of a polyurethane foaming device of the present application; Figure 3 It is a structural schematic diagram of a stirring component in a polyurethane foaming device of the present application; Figure 4 It is a structural schematic diagram of a screening element in a polyurethane foaming device of the present application.

[0026] 1. Base; 2. Material tank; 3. Mixing chamber; 4. Discharge pipe; 5. Metering pump 1; 6. High-pressure pump; 7. Rotating shaft; 8. Rotating disk; 9. Dividing plate; 10. Stirring assembly; 101. Stirring blade; 102. Flipping blade; 11. Feed pipe; 12. Metering pump 2; 13. Control valve; 14. Heating element; 141. Mounting pipe; 142. Heating wire 1; 15. Hollow interlayer 1; 16. Dispersion plate; 17. Dispersion groove; 18. Through groove; 19. Screening element; 191. Screening tube; 192. Dividing line; 193. Positioning plate; 20. Mounting hole; 21. Hollow interlayer 2; 22. Heating wire 2. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 This application is described in further detail.

[0028] The present application embodiment discloses a polyurethane foaming device. Figure 1 , including a base 1, a material tank 2 installed on the base 1 and used to place raw materials, and a mixing chamber 3 installed on the base 1. In the present application, two groups of material tanks 2 are arranged. After the two groups of raw materials are transferred to the mixing chamber 3, they are mixed and foamed under high pressure in the mixing chamber 3. A discharge pipe 4 is fixedly installed at the feeding end of the mixing chamber 3. One end of the discharge pipe 4 is connected to the material tank 2, and the other end of the discharge pipe 4 is connected to the mixing chamber 3. A metering pump 5 is also installed on the discharge pipe 4 to control the discharge amount of the discharge pipe 4. A high-pressure pump 6 is installed on the discharge pipe 4. The high-pressure pump 6 is used to control the discharge pressure of the discharge pipe 4, so as to facilitate the control of the discharge of the discharge pipe 4. A switch valve is also installed on the discharge pipe 4 to control the feeding and discharging of the discharge pipe 4.

[0029] Reference Figure 1 and Figure 2A feed pipe 11 is installed on the top surface of the material tank 2. The raw material enters the material tank 2 through the feed pipe 11. Different numbers of feed pipes 11 can be installed on the top surface of the material tank 2 according to the type of raw material. A metering pump 12 is installed at the feed end of the feed pipe 11. The metering pump 12 is used to control the feed amount of the feed pipe 11. A control valve 13 is also installed on the feed pipe 11 to control the feed and discharge of the feed pipe 11. A heating element 14 is installed on the material tank 2 at the discharge end of the feed pipe 11. The heating element 14 includes a mounting pipe 141 fixedly mounted on the material tank 2 and sleeved on the outer wall of the feed pipe 11 and a heating wire 142 installed in the mounting pipe 141. The inner wall of the mounting pipe 141 is provided with a hollow interlayer 15 for installing the heating wire 142. When the feed pipe 11 transmits the raw material into the material tank 2, the heating wire 142 heats the raw material, and the heated raw material enters the material tank 2.

[0030] Reference Figure 2 and Figure 3 After the feed pipe 11 transfers the raw material into the material tank 2, a rotating shaft 7 is installed in the material tank 2 along the height direction, and a motor for driving the rotating shaft 7 to rotate is fixedly installed on the material tank 2. A rotating disk 8 located at the feed end of the material tank 2 is fixedly installed on the rotating shaft 7, and a dividing plate 9 is spirally provided on the top surface of the rotating disk 8, and a dispersing plate 16 is also spirally provided on the top surface of the rotating disk 8, and a plurality of dispersing grooves 17 are obliquely opened on the side wall of the dispersing plate 16 along the length direction. Since the dividing plate 9 and the dispersing plate 16 are both spirally provided, the feed end of the feed pipe 11 is located above the spiral center area of ​​the dividing plate 9 and the dispersing plate 16, and when the raw material falls, the raw material directly falls into the spiral center area of ​​the dividing plate 9 and the dispersing plate 16. The rotating disk 8 rotates, and the raw material is dispersed and thrown out as the rotating disk 8 rotates. The dispersing grooves 17 on the dispersing plate 16 facilitate the breaking and mixing of the raw materials, thereby accelerating the mixing efficiency of the raw materials.

[0031] Reference Figure 2 and Figure 3, after the raw materials are scattered by the dispersion plate 16 and the dividing plate 9, a stirring assembly 10 located below the rotating disk 8 is also installed on the rotating shaft 7, and the stirring assembly 10 stirs and mixes the scattered raw materials to improve the mixing efficiency of the raw materials. The stirring assembly 10 includes a plurality of stirring blades 101 spirally arranged along the length direction of the rotating shaft 7 and a plurality of flipping blades 102 arranged on the stirring shaft and located at the lower end of the stirring blade 101, and the stirring blades 101 and the flipping blades 102 are fixedly mounted on the rotating shaft 7. The spiral directions of two adjacent stirring blades 101 are opposite, and the raw materials can be mixed and stirred in different directions to improve the mixing efficiency of the raw materials. The stirring blade 101 is provided with a plurality of through grooves 18 along the length direction, and the through grooves 18 extend along the width direction of the stirring blade 101. When the stirring blade 101 stirs the raw materials, part of the raw materials flow from the through grooves 18 to the other side of the stirring blade 101 and stir and mix with the raw materials on the other side of the stirring blade 101, effectively accelerating the mixing efficiency of the raw materials.

[0032] Reference Figure 2 and Figure 3 The bottom surface of the turning blade 102 is in close contact with the inner bottom surface of the material tank 2, and the bottom surface of the turning blade 102 is bent toward the inner bottom surface of the material tank 2, so that the turning blade 102 can guide the material to turn. The upper end of the turning blade 102 is bent toward the adjacent turning blade 102. When the turning blade 102 rotates, the raw materials at the bottom of the material tank 2 are turned over and then guided upward. At this time, the stirring blade 101 will stir the raw materials, effectively reducing the possibility of the raw materials settling to the bottom.

[0033] Reference Figure 2 A hollow interlayer 21 is provided on the side wall of the material tank 2 , and a heating wire 22 is spirally wound inside the hollow interlayer 21 . The heating wire 22 is used to maintain the material temperature in the material tank 2 , so that the stirring component 10 can stir and mix the raw materials.

[0034] Reference Figure 2 and Figure 4When the equipment needs to foam, the discharge pipe 4 transfers the raw materials in the material tank 2 to the mixing chamber 3 for mixing. Before the raw materials reach the mixing chamber 3 from the discharge pipe 4, a screening element 19 is provided at the feed end of the discharge pipe 4. The screening element 19 includes a positioning plate 193 fixedly mounted on one end of the discharge pipe 4 close to the material tank 2, a plurality of screening tubes 191 fixedly mounted on the positioning plate 193, and a plurality of dividing lines 192 fixed in the screening tube 191. The positioning plate 193 is arranged at both ends of the screening tube 191 and a mounting hole 20 for positioning the screening tube 191 is provided on the positioning plate 193. The positioning plate 193 fixes the screening tube 191 on the discharge pipe 4 to improve the stability of the screening tube 191 in the discharge pipe 4. A plurality of dividing lines 192 are cross-set in the sieve tube 191. When the raw material enters the discharge pipe 4, the sieve tube 191 diverts the raw material, and the dividing lines 192 intercept the bubbles generated by the stirring of the raw material. At the same time, the dividing lines 192 can also divide the bubbles to improve the fineness of the mixed raw material.

[0035] The implementation principle of a polyurethane foaming device in an embodiment of the present application is as follows: the raw materials enter the material tank 2 from the feed pipe 11. When the raw materials enter the material tank 2, the heating wire 142 heats the raw materials to facilitate the mixing of the raw materials. The feed pipe 11 transmits all the raw materials to the central area of ​​the rotating disk 8. When the rotating disk 8 rotates, the raw materials are intercepted by the dividing plate 9 and move in a spiral shape. The dispersion plate 16 breaks up the raw materials. The raw materials flow out from the dispersion tank 17 and mix with the raw materials on the other side of the dispersion plate 16. During the movement of the raw materials, the dispersion and breaking operation is repeated. The raw materials flow out from the discharge end of the dividing plate 9 and reach the material tank 2. The stirring blade 101 and the turning blade 102 stir and mix the raw materials. The turning blade 102 continuously turns over the raw materials at the bottom of the material tank 2 to avoid the precipitation of materials at the bottom of the material tank 2. The raw materials turned upward by the turning blade 102 are stirred by the stirring blade 101 again to ensure the uniformity of the raw material mixing.

[0036] When the equipment needs to be used, the switch valve is opened, and the raw materials flow out from the material tank 2 to the mixing chamber 3, and are mixed and foamed under high pressure in the mixing chamber 3. Before entering the mixing chamber 3, the screening element 19 screens the raw materials to further ensure the fineness of the raw material mixing, facilitate the subsequent high-pressure foaming, and improve the foaming quality.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A polyurethane foaming device, comprising a base (1), a material tank (2) arranged on the base (1), and a mixing chamber (3) arranged on the base (1), wherein the mixing chamber (3) is provided with a discharge pipe (4) connected to the material tank (2), the discharge pipe (4) is provided with a metering pump (5), and the discharge pipe (4) is also provided with a high-pressure pump (6), characterized in that: The material tank (2) is provided with a rotating shaft (7) along the height direction, a rotating disk (8) located at the feeding end of the material tank (2) is provided at the upper end of the rotating shaft (7), a dividing plate (9) is spirally provided on the top surface of the rotating disk (8), and a stirring assembly (10) located in the material tank (2) and below the rotating disk (8) is provided on the rotating shaft (7).

2. A polyurethane foaming device according to claim 1, characterized in that: A plurality of feed pipes (11) are provided on the top surface of the material tank (2), the discharge ends of the feed pipes (11) are located above the central area formed by the spiral of the dividing plate (9), the feed ends of the feed pipes (11) are provided with metering pump 2 (12), and the feed pipes (11) are provided with a control valve (13).

3. A polyurethane foaming device according to claim 2, characterized in that: The material tank (2) is provided with a heating element (14) located at the discharge end of the feed pipe (11), the heating element (14) comprising a mounting tube (141) sleeved on the feed pipe (11) and a heating wire (142) arranged in the mounting tube (141), and the inner wall of the mounting tube (141) is provided with a hollow interlayer (15) for mounting the heating wire (142).

4. A polyurethane foaming device according to claim 1, characterized in that: A dispersion plate (16) is spirally provided on the top surface of the rotating disk (8), and a plurality of dispersion grooves (17) are obliquely provided on the side wall of the dispersion plate (16) along the length direction.

5. A polyurethane foaming device according to claim 1, characterized in that: The stirring assembly (10) comprises a plurality of stirring blades (101) spirally arranged along the length direction of the rotating shaft (7) and a plurality of turning blades (102) arranged at the lower end of the rotating shaft (7) and located at the discharge end of the material tank (2), wherein the spiral directions of two adjacent stirring blades (101) are opposite.

6. A polyurethane foaming device according to claim 5, characterized in that: The stirring blade (101) is provided with a plurality of through grooves (18) along the length direction, and the through grooves (18) extend along the width direction of the stirring blade (101).

7. A polyurethane foaming device according to claim 5, characterized in that: The bottom surface of the flip leaf (102) is in close contact with the inner bottom surface of the material tank (2), and the upper end of the flip leaf (102) is bent toward the adjacent flip leaf (102).

8. A polyurethane foaming device according to claim 1, characterized in that: A screening element (19) is provided at the feed end of the discharge pipe (4), and the screening element (19) comprises a plurality of screening tubes (191) arranged at one end of the discharge pipe (4) close to the material tank (2), a plurality of dividing lines (192) arranged inside the screening tubes (191), and positioning plates (193) arranged at both ends of the plurality of screening tubes (191), wherein the positioning plates (193) are provided with mounting holes (20) for positioning the screening tubes (191).

9. A polyurethane foaming device according to claim 8, characterized in that: A plurality of the separation lines (192) are cross-arranged in the sieve tube (191).

10. The polyurethane foaming equipment according to claim 1, characterized in that: The side wall of the material tank (2) is provided with a second hollow interlayer (21), and a second heating wire (22) is spirally wound inside the second hollow interlayer (21).

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