A polyurethane composite board preparation device

Abstract

The present invention relates to the field of plastic processing technology, and specifically to a polyurethane composite board preparation device, comprising an outer shell, an inner cylinder, a driving mechanism and a stirring assembly; the inner cylinder is vertically arranged in the outer shell; the inner wall of the inner cylinder is provided with a wave groove around the circumference of the inner cylinder; the stirring assembly comprises an upper mounting block, an upper blade, a connecting ring, a lower blade and a lower mounting block, the connecting ring is located in the inner cylinder and slides with the wave groove, and the wave groove keeps the connecting ring horizontal all the time; the upper blade and the lower blade are both strip-shaped extending spirally around the vertical axis, and can expand and gather in the vertical direction; the upper blade is connected to the upper mounting block and the connecting ring, and the lower blade is connected to the lower mounting block and the connecting ring. When the stirring assembly revolves around the axis of the inner cylinder, the raw materials in the inner cylinder are stirred and mixed in the circumferential direction, and the connecting ring moves up and down in cooperation with the wave groove, driving the upper blade and the lower blade to alternately expand and gather, disturbing the raw materials in the vertical direction, and thus obtaining a better mixing effect.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, and in particular to a polyurethane composite board preparation device. Background Art

[0002] Polyurethane composite board is a new type of building decoration material composed of polyurethane and other materials. It is necessary to first mix the polyurethane resin with additives, fillers, etc. in a uniform ratio, and then pour it into a mold to form a polyurethane composite material, and finally solidify it into shape. Since the polyurethane raw material is a viscoelastic fluid, it will be entangled on the stirring shaft during the stirring and mixing process, affecting the operation of the stirrer. In the prior art, Chinese patent CN115945101B discloses a shaftless stirrer, which eliminates the stirring shaft in the center position and uses spiral inner and outer stirring rods for stirring, which alleviates the climbing rod effect of the stirrer under high viscosity systems, but this method has a single stirring form and the mixing effect on the raw materials is not good enough. Summary of the invention

[0003] The invention provides a polyurethane composite board preparation device to solve the problem that the existing agitator has an insufficient mixing effect on raw materials.

[0004] A polyurethane composite board preparation device of the present invention adopts the following technical scheme:

[0005] A polyurethane composite board preparation device comprises an outer shell, an inner cylinder, a driving mechanism and a stirring assembly; the inner cylinder is vertically arranged in the outer shell, and the upper and lower ends of the inner cylinder are both provided with bottom plates which are rotatably matched with the inner cylinder; the bottom plate and the inner cylinder define a mixing chamber for containing polyurethane raw materials; the inner wall of the inner cylinder is provided with a wave groove around the circumference of the inner cylinder; the stirring assembly comprises an upper mounting block, an upper blade, a connecting ring, a lower blade and a lower mounting block, the upper mounting block and the lower mounting block are respectively rotatably mounted on a bottom plate, and the upper mounting block is located above the lower mounting block, and both are located at the eccentric position of the inner cylinder with the lower mounting block; the connecting ring is located in the inner cylinder and slidably matched with the wave groove, and the wave groove keeps the connecting ring horizontal all the time; the upper blade and the lower blade are both in the shape of strips which extend spirally around a vertical axis, and can be expanded and gathered in the vertical direction; the upper end of the upper blade is connected to the upper mounting block, and the lower end is rotatably mounted on the connecting ring, the upper end of the lower blade is rotatably mounted on the connecting ring, and the lower end is mounted on the lower mounting block; the driving mechanism drives the upper mounting block and the lower mounting block to rotate and revolve around the axis of the inner cylinder.

[0006] Optionally, both the upper blade and the lower blade are tapered, with one end being larger and the other end being smaller in the vertical direction.

[0007] Optionally, the upper blade and the lower blade are larger at one end close to the connecting ring and smaller at the other end away from the connecting ring.

[0008] Optionally, the connection position between the upper blade and the upper mounting block is located at an eccentric position of the upper mounting block, and the connection position between the lower blade and the lower mounting block is located at an eccentric position of the lower mounting block.

[0009] Optionally, along the direction of revolution of the upper mounting block or the lower mounting block, a section of the path from the wave crest to the adjacent wave trough of the wave trough is a descending band, and a section of the path from the wave trough to the adjacent wave crest is an ascending band; there are multiple stirring assemblies, which are spaced apart around the circumference of the inner cylinder, and the connecting rings of at least two adjacent stirring assemblies are in the ascending band and the descending band in the wave trough.

[0010] Optionally, the driving mechanism includes a center wheel, a planetary wheel, a ring gear and a planetary carrier, the center wheel is rotatably mounted in the outer shell and is coaxial with the inner cylinder; the ring gear is coaxial with the center wheel and fixed to the outer shell; the planetary carrier is rotatably mounted in the outer shell and its rotation axis is coaxial with the center wheel; the planetary wheel is rotatably mounted on the planetary carrier and is located between the center wheel and the ring gear, and is meshed with both the center wheel and the ring gear; the planetary wheel is coaxial with the upper mounting block or the lower mounting block and is fixedly connected.

[0011] Optionally, there are two driving mechanisms, which are respectively located on the upper and lower sides of the inner cylinder, and the planetary gears of the two driving mechanisms are respectively connected to the upper mounting block and the lower mounting block; the rotation and revolution directions of the planetary gears of the two driving mechanisms are the same.

[0012] Optionally, the driving mechanism further includes a motor, which is mounted on the housing and is used to drive the central wheel to rotate.

[0013] Optionally, a feed inlet and a discharge port connected to the mixing chamber are provided on the shell, and the discharge port is located below the feed inlet.

[0014] Optionally, an annular groove is provided in the inner ring of the connecting ring, a first small ball is provided at the lower end of the upper blade, and a second small ball is provided at the upper end of the lower blade, and both the first small ball and the second small ball are rotatably mounted in the annular groove.

[0015] The beneficial effects of the present invention are as follows: when the upper and lower mounting blocks of the polyurethane composite board preparation device of the present invention revolve around the axis of the inner cylinder, they are respectively driven by the upper and lower blades to revolve around the axis of the inner cylinder. While the upper and lower blades stir and mix the raw materials in the mixing chamber in the circumferential direction, the connecting ring moves up and down in cooperation with the wave groove, driving the upper and lower blades to alternately relax and gather, disturbing the raw materials in the vertical direction to obtain a better mixing effect. When gathering, the spiral strips of two adjacent circles will approach each other, break up the bubbles, make the introduced gas more evenly distributed, and improve the foaming effect of the raw materials.

[0016] Furthermore, by providing conical upper blades and lower blades, the contact area between the upper blades and the lower blades and the raw materials is larger when they are expanded and gathered, so that a larger stirring range can be covered, thereby obtaining a better stirring effect.

[0017] Furthermore, by setting up multiple stirring components, and making the connecting rings of two adjacent stirring components respectively in the wave groove in the ascending band and the descending band, when the stirring components revolve, the upper blades and lower blades of the two adjacent stirring components expand and gather in opposite directions, causing disturbances in opposite directions to the raw materials, making the flow of the raw materials in the mixing chamber more complicated, the mixing effect of the raw materials better, and also promoting the gas introduced into the raw materials to be more dispersed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a polyurethane composite board preparation device of the present invention;

[0020] Figure 2 for Figure 1 A top view of

[0021] Figure 3 Based Figure 2 Schematic diagram of the section along the AA direction;

[0022] Figure 4 A top view of the internal structure of a housing in an embodiment of a polyurethane composite board preparation device of the present invention;

[0023] Figure 5 for Figure 4 Schematic diagram of the section along the middle BB direction;

[0024] Figure 6 It is a partial structural schematic diagram of a stirring assembly and a driving mechanism in an embodiment of a polyurethane composite board preparation device of the present invention;

[0025] Figure 7 It is a schematic diagram of the partial structural disassembly of a stirring assembly in an embodiment of a polyurethane composite board preparation device of the present invention;

[0026] In the figure: 100, outer shell; 110, feed port; 120, discharge port; 200, inner cylinder; 210, bottom plate; 220, wave groove; 300, driving mechanism; 310, center wheel; 320, planetary gear; 330, gear ring; 340, planetary carrier; 350, motor; 400, stirring assembly; 410, upper mounting block; 420, upper blade; 421, first small ball; 430, connecting ring; 431, ring groove; 432, matching block; 433, arc surface; 440, lower blade; 441, second small ball; 450, lower mounting block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] An embodiment of a polyurethane composite board preparation device of the present invention is as follows Figures 1 to 7 As shown, it includes a housing 100 , an inner cylinder 200 , a driving mechanism 300 and a stirring assembly 400 .

[0029] The inner cylinder 200 is vertically arranged in the outer shell 100, and the upper and lower ends of the inner cylinder 200 are provided with bottom plates 210 that are rotatably matched with the inner cylinder 200; the bottom plate 210 and the inner cylinder 200 define a mixing chamber for containing polyurethane raw materials. The outer shell 100 is provided with a feed port 110 and a discharge port 120 that are connected to the mixing chamber, and the discharge port 120 is located below the feed port 110. The inner wall of the inner cylinder 200 is provided with a wave groove 220 around the circumference of the inner cylinder 200, that is, the wave height direction of the wave groove 220 is the vertical direction, and the wavelength direction is the circumference of the inner cylinder 200.

[0030] The stirring assembly 400 includes an upper mounting block 410, an upper blade 420, a connecting ring 430, a lower blade 440 and a lower mounting block 450. The upper mounting block 410 and the lower mounting block 450 are respectively rotatably mounted on a bottom plate 210, and the upper mounting block 410 is located above the lower mounting block 450, and both the upper mounting block 410 and the lower mounting block 450 are located at an eccentric position of the inner cylinder 200. Specifically, the rotation axes of the upper mounting block 410 and the lower mounting block 450 are coaxial and both are vertical axes. The connecting ring 430 is located in the inner cylinder 200 and is slidably matched with the wave groove 220, and the wave groove 220 keeps the connecting ring 430 always horizontal; specifically, the wave groove 220 is a T-shaped groove, and a matching block 432 is provided on the connecting ring 430, and the matching block 432 extends into the wave groove 220 and is slidably matched with the wave groove 220, thereby preventing the connecting ring 430 from being separated from the wave groove 220; and the connecting ring 430 is provided with an arc surface 433 that fits the wall of the inner cylinder 200 on the side close to the inner wall of the inner cylinder 200, and the arc surface 433 contacts the wall of the inner cylinder 200, thereby keeping the connecting ring 430 always horizontal. The upper blade 420 and the lower blade 440 are both strip-shaped and spirally extended around a vertical axis, and can expand and gather in the vertical direction; the upper blade 420 is connected to the upper mounting block 410 at its upper end, and is rotatably mounted on the connecting ring 430 at its lower end; the lower blade 440 is rotatably mounted on the connecting ring 430 at its upper end, and is mounted on the lower mounting block 450 at its lower end. Specifically, an annular groove 431 is provided in the inner ring of the connecting ring 430, a first small ball 421 is provided at the lower end of the upper blade 420, and a second small ball 441 is provided at the upper end of the lower blade 440, and both the first small ball 421 and the second small ball 441 are rotatably mounted in the annular groove 431.

[0031] The driving mechanism 300 drives the upper mounting block 410 and the lower mounting block 450 to rotate in the same direction and revolve around the axis of the inner cylinder 200 in the same direction.

[0032] When the upper mounting block 410 and the lower mounting block 450 revolve around the axis of the inner cylinder 200, the upper blades 420 and the lower blades 440 drive the connecting ring 430 to revolve around the axis of the inner cylinder 200 respectively. While the upper blades 420 and the lower blades 440 stir and mix the raw materials in the mixing chamber in the circumferential direction, the connecting ring 430 moves up and down in cooperation with the wave groove 220, driving the upper blades 420 and the lower blades 440 to alternately relax and gather, disturbing the raw materials in the vertical direction to obtain a better mixing effect. When gathering, the spiral strips of two adjacent circles will approach each other, break up the bubbles, make the introduced gas distribution more uniform, and improve the foaming effect of the raw materials.

[0033] In this embodiment, the upper blade 420 and the lower blade 440 are both tapered, and one end is larger and the other end is smaller in the vertical direction. By setting the tapered upper blade 420 and the lower blade 440, the contact area between the upper blade 420 and the lower blade 440 and the raw material is larger when the upper blade 420 and the lower blade 440 are expanded and gathered, and a larger stirring range can be covered, thereby obtaining a better stirring effect. Preferably, the upper blade 420 and the lower blade 440 are larger at one end close to the connecting ring 430, smaller at one end away from the connecting ring 430, and the end that moves up and down with the connecting ring 430 is the larger end, which can generate greater disturbance in the vertical direction.

[0034] In this embodiment, the connection position between the upper blade 420 and the upper mounting block 410 is located at an eccentric position of the upper mounting block 410, and the connection position between the lower blade 440 and the lower mounting block 450 is located at an eccentric position of the lower mounting block 450, so as to increase the rotation range of the upper blade 420 and the lower blade 440 when the upper blade 420 and the lower blade 440 rotate with the upper mounting block 410 and the lower mounting block 450 respectively, thereby improving their stirring effect.

[0035] In this embodiment, along the direction of revolution of the upper mounting block 410 or the lower mounting block 450, a section of the path from the wave crest of the wave trough 220 to the adjacent wave trough is a descending band, and a section of the path from the wave trough to the adjacent wave crest is an ascending band; there are multiple stirring assemblies 400, which are circumferentially spaced around the inner cylinder 200, and the connecting rings 430 of at least two adjacent stirring assemblies 400 are respectively in the ascending band and the descending band in the wave trough 220, so that when the stirring assembly 400 revolves, the upper blades 420 and the lower blades 440 of the two adjacent stirring assemblies 400 expand and gather in opposite directions, causing disturbances in opposite directions to the raw materials, making the flow of the raw materials in the mixing chamber more complicated, the mixing effect of the raw materials better, and also promoting the gas introduced into the raw materials to be more dispersed.

[0036] In this embodiment, the driving mechanism 300 includes a center wheel 310, a planetary wheel 320, a ring gear 330 and a planet carrier 340. The center wheel 310 is rotatably mounted in the housing 100 and is coaxial with the inner cylinder 200. The ring gear 330 is coaxial with the center wheel 310 and fixed to the housing 100. The planet carrier 340 is rotatably mounted in the housing 100 and its rotation axis is coaxial with the center wheel 310. The planetary wheel 320 is rotatably mounted on the planet carrier 340 and is located between the center wheel 310 and the ring gear 330, and is meshed with both the center wheel 310 and the ring gear 330. The planetary wheel 320 is coaxial with the upper mounting block 410 or the lower mounting block 450 and is fixedly connected. The driving mechanism 300 also includes a motor 350, which is mounted on the housing 100 and is used to drive the center wheel 310 to rotate. When the center wheel 310 rotates, it drives the planetary wheel 320 to rotate and revolve around the center wheel 310. When there are multiple stirring assemblies 400, there are multiple corresponding planetary gears 320, which are circumferentially distributed around the center wheel 310. In some other embodiments, there are multiple planetary gears 320 corresponding to each upper mounting block 410 or lower mounting block 450, which form a group, and multiple planetary gears 320 in the same group are arranged along the radial direction of the center wheel 310 and meshed in sequence, and the two planetary gears 320 located at the edge are meshed with the center wheel 310 and the ring gear 330 respectively, and the upper mounting block 410 or the lower mounting block 450 is coaxial with one of the planetary gears 320 and fixedly connected.

[0037] In this embodiment, there are two driving mechanisms 300, which are respectively located at the upper and lower sides of the inner cylinder 200, and the planetary gears 320 of the two driving mechanisms 300 are respectively connected to the upper mounting block 410 and the lower mounting block 450; the rotation and revolution directions of the planetary gears 320 of the two driving mechanisms 300 are the same. A vent pipe (not shown in the figure) runs through the center of the upper center wheel 310, which passes through the center of the bottom plate 210 located on the upper side of the inner cylinder 200 and is inserted into the raw material in the mixing chamber, for ventilating the raw material to promote the foaming of the polyurethane raw material.

[0038] When the polyurethane composite board preparation device of the present invention is in use, polyurethane resin and raw materials such as additives and fillers are delivered to the mixing chamber through the feed port 110, and gas is continuously introduced into the mixing chamber, and the motors 350 of the two driving mechanisms 300 are started. The motors 350 drive the central wheel 310 to rotate. While the central wheel 310 rotates, it drives the planetary wheel 320 to rotate and revolve around the central wheel 310. The upper mounting block 410 revolves and rotates with the planetary wheel 320 of the driving mechanism 300 located on the upper side of the inner cylinder 200, and the lower mounting block 450 revolves and rotates with the planetary wheel 320 of the driving mechanism 300 located on the lower side of the inner cylinder 200. When the upper mounting block 410 and the lower mounting block 450 revolve, they drive the bottom plate 210 where they are located to rotate around the axis of the inner cylinder 200. When the upper blade 420 and the lower blade 440 revolve with the upper mounting block 410 and the lower mounting block 450, the raw materials in the mixing chamber are stirred and mixed in the circumferential direction. At the same time, the connecting ring 430 moves up and down in cooperation with the wave groove 220, driving the upper blade 420 and the lower blade 440 to alternately relax and gather, disturbing the raw materials in the vertical direction, promoting the mixing of the raw materials, and breaking up the bubbles in the raw materials. The mixed raw materials are discharged from the discharge port 120 and poured into the mold of the next process, and then solidified to obtain a formed composite board.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A polyurethane composite board preparation device, characterized in that: It includes an outer shell, an inner cylinder, a driving mechanism and a stirring assembly; The inner cylinder is vertically arranged in the outer shell, and bottom plates are arranged at both upper and lower ends of the inner cylinder to rotate with the inner cylinder; the bottom plate and the inner cylinder define a mixing chamber for containing polyurethane raw materials; the inner wall of the inner cylinder is provided with a wave groove around the circumference of the inner cylinder; The stirring assembly comprises an upper mounting block, an upper blade, a connecting ring, a lower blade and a lower mounting block. The upper mounting block and the lower mounting block are respectively rotatably mounted on the bottom plates arranged at the upper and lower ends of the inner cylinder, and the upper mounting block is located above the lower mounting block, and both the upper mounting block and the lower mounting block are located at the eccentric position of the inner cylinder; the connecting ring is located in the inner cylinder and slidably cooperates with the wave groove, and the wave groove keeps the connecting ring horizontal all the time; the upper blade and the lower blade are both in the shape of strips extending spirally around the vertical axis, and can expand and gather in the vertical direction; the upper end of the upper blade is connected to the upper mounting block, and the lower end is rotatably mounted on the connecting ring; the upper end of the lower blade is rotatably mounted on the connecting ring, and the lower end is mounted on the lower mounting block; The driving mechanism drives the upper mounting block and the lower mounting block to rotate and revolve around the axis of the inner cylinder.

2. A polyurethane composite board preparation device according to claim 1, characterized in that: The upper blade and the lower blade are both tapered, with one end being larger and the other end being smaller in the vertical direction.

3. A polyurethane composite board preparation device according to claim 2, characterized in that: The ends of the upper blade and the lower blade close to the connecting ring are larger, and the ends away from the connecting ring are smaller.

4. The polyurethane composite board preparation device according to claim 1, characterized in that: The connection position between the upper blade and the upper mounting block is located at an eccentric position of the upper mounting block, and the connection position between the lower blade and the lower mounting block is located at an eccentric position of the lower mounting block.

5. The polyurethane composite board preparation device according to claim 1, characterized in that: Along the direction of revolution of the upper mounting block or the lower mounting block, a section of the path from the wave crest to the adjacent wave trough of the wave trough is a descending wave band, and a section of the path from the wave trough to the adjacent wave crest is an ascending wave band; there are multiple stirring assemblies, which are spaced apart around the circumference of the inner cylinder, and the connecting rings of at least two adjacent stirring assemblies are respectively in the ascending wave band and the descending wave band in the wave trough.

6. The polyurethane composite board preparation device according to claim 1, characterized in that: The driving mechanism includes a center wheel, a planetary wheel, a ring gear and a planetary carrier. The center wheel is rotatably installed in the outer shell and is coaxial with the inner cylinder; the ring gear is coaxial with the center wheel and fixed to the outer shell; the planetary carrier is rotatably installed in the outer shell and its rotation axis is coaxial with the center wheel; the planetary wheel is rotatably installed on the planetary carrier and is located between the center wheel and the ring gear, and is meshed with both the center wheel and the ring gear; the planetary wheel is coaxial with the upper mounting block or the lower mounting block and is fixedly connected.

7. A polyurethane composite board preparation device according to claim 6, characterized in that: There are two driving mechanisms, which are respectively located at the upper and lower sides of the inner cylinder, and the planetary gears of the two driving mechanisms are respectively connected to the upper mounting block and the lower mounting block; the planetary gears of the two driving mechanisms have the same rotation direction and the same revolution direction.

8. The polyurethane composite board preparation device according to claim 1, characterized in that: The driving mechanism also includes a motor, which is installed on the housing and is used to drive the central wheel to rotate.

9. The polyurethane composite board preparation device according to claim 1, characterized in that: The outer shell is provided with a feed inlet and a discharge inlet which are connected with the mixing chamber, and the discharge inlet is located below the feed inlet.

10. The polyurethane composite board preparation device according to claim 1, characterized in that: An annular groove is provided in the inner circle of the connecting ring, a first small ball is provided at the lower end of the upper blade, and a second small ball is provided at the upper end of the lower blade. Both the first small ball and the second small ball are rotatably installed in the annular groove.

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