Polyurethane tire centrifugal machine

Abstract

The utility model discloses a polyurethane tire centrifugal machine which comprises a vehicle frame, a plurality of wheel assemblies arranged at the bottom of the vehicle frame, a rotating disc rotationally arranged on the vehicle frame, a tire centrifugal mold installed on the rotating disc and a centrifugal driver capable of driving the rotating disc and the tire centrifugal mold to rotate together. A first fixing seat and a second fixing seat which are separated from each other are fixed on one side of the frame, a first connecting piece is hinged to the first fixing seat, a rotating arm is hinged to the second fixing seat, and a second connecting piece is hinged to the other end, opposite to the second fixing seat, of the rotating arm. Due to the fact that the wheels are arranged at the bottom of the frame and the first connecting piece and the second connecting piece which are used for being connected with the power element are movably arranged on the frame, when the centrifugal machine works, the centrifugal machine can be dragged by the power element to move around a set path in a plant, and the capacity of the polyurethane tire centrifugal machine in a single production line can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane tire production, in particular to a polyurethane tire centrifuge. Background Art

[0002] Polyurethane tires are wheels made of foamed plastic through injection molding. They have the characteristics of dimensional stability, low shrinkage, stable chemical composition, corrosion resistance, anti-aging, and good wear resistance.

[0003] The polyurethane foaming machine is a special equipment for polyurethane foaming, which is often used in the production of foam wheels. Generally, polyether polyol and polyisocyanate are used as the A and B component liquids. After precise proportioning and high-speed stirring, the A and B component liquids are respectively transported to the stirring head. After high-speed and strong stirring, the liquids are evenly injected into the centrifugal mold on the centrifuge, and then the centrifugal mold is centrifugally rotated to produce the required product.

[0004] In traditional production lines, centrifuges are fixed in position. A crane arm delivers the slurry to the centrifuges, forcing operators to shuttle back and forth between the centrifuges to perform the injection process. Due to the limited radius of the crane arm, only around 20 centrifuges can be used on a single production line, resulting in low production output. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a polyurethane tire centrifuge, which can be pulled by a power element and move around a set path in the factory during operation, thereby facilitating increasing the capacity of the polyurethane tire centrifuge in a single production line.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A polyurethane tire centrifuge comprises a frame, a plurality of wheel assemblies arranged at the bottom of the frame, a turntable rotatably arranged on the frame, a tire centrifugal mold mounted on the turntable, and a centrifugal driver capable of driving the turntable and the tire centrifugal mold to rotate together. A first fixed seat and a second fixed seat spaced apart from each other are fixed to one side of the frame. The first fixed seat is hinged to a first connecting member, the second fixed seat is hinged to a rotating arm, and the other end of the rotating arm opposite to the second fixed seat is hinged to a second connecting member.

[0008] In a preferred embodiment of the present invention, both the first connecting member and the second connecting member have a connecting plate, and the connecting plate is provided with a plurality of through holes for installing fasteners.

[0009] In a preferred embodiment of the present utility model, the frame includes a bottom frame. The first fixing seat and the second fixing seat are both fixed on the same side of the bottom frame, and all the wheel assemblies are installed on the lower surface of the bottom frame.

[0010] In a preferred embodiment of the present utility model, the wheel assembly is a universal wheel assembly.

[0011] In a preferred embodiment of the present utility model, a table top plate is fixed on the frame. A bearing seat is fixed on the table top plate. A rotating shaft inserted into the bearing seat is fixed on the turntable, and a bearing is sleeved between the bearing seat and the rotating shaft.

[0012] In a preferred embodiment of the present utility model, the centrifugal driver includes a motor installed on the table top plate, and the output shaft of the motor is connected to the rotating shaft.

[0013] In a preferred embodiment of the present utility model, the centrifugal mold includes a lower mold and an upper mold. A first annular groove is provided on the upper surface of the lower mold, and a second annular groove corresponding to the first annular groove is provided on the lower surface of the upper mold. A mold cavity is formed between the first annular groove and the second annular groove. A material injection hole is provided in the middle of the upper mold. The lower surface of the upper mold has a transition surface located between the material injection hole and the second annular groove, and a feeding gap is formed between the transition surface and the lower mold.

[0014] In a preferred embodiment of the present utility model, a flash gap surrounding the outside of the mold cavity and communicating with the mold cavity is further provided between the upper mold and the lower mold.

[0015] The beneficial effects of the present utility model are as follows: Since wheels are provided at the bottom of the frame, and a first connecting member and a second connecting member for connecting power elements are movably provided on the frame, the centrifuge can be pulled by the power elements to move along a set path in the factory building during operation, which is beneficial to improving the capacity of the polyurethane tire centrifuge in a single production line. Description of the Drawings

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is a partial top view of the polyurethane tire production line;

[0018] Figure 3 is a top view of the present utility model when being pulled by a chain;

[0019] Figure 4 is an exploded view of the main part of the centrifuge;

[0020] Figure 5 is a cross-sectional view of the centrifugal mold;

[0021] Figure 6 is Figure 5 The enlarged view of part A in Specific implementation mode

[0022] Next, in conjunction with the attached drawings, the technical solutions of the present utility model will be clearly and completely described.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back...) in the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indicators will also change accordingly. In addition, the descriptions involving "preferred", "sub-preferred", etc. in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "preferred" and "sub-preferred" may explicitly or implicitly include at least one of such features.

[0024] Referring to Figures 1 to 6 , the present utility model provides a polyurethane tire centrifuge, which includes a vehicle frame 1, a plurality of wheel assemblies 2 arranged at the bottom of the vehicle frame 1, a turntable 31 rotatably arranged on the vehicle frame 1, a tire centrifugal mold 4 installed on the turntable 31, and a centrifugal driver 32 capable of driving the turntable 31 and the tire centrifugal mold 4 to rotate together. A first fixed seat 11 and a second fixed seat 12 separated from each other are fixed on one side of the vehicle frame 1. A first connecting member 13 is hinged to the first fixed seat 11, a rotating arm 14 is hinged to the second fixed seat 12, and the other end of the rotating arm 14 opposite to the second fixed seat 12 is hinged to a second connecting member 15.

[0025] Specifically, both the first connecting member 13 and the second connecting member 15 have a connecting plate 101, and a plurality of through holes 102 for installing fasteners are arranged on the connecting plate 101.

[0026] Preferably, the vehicle frame 1 includes a bottom frame 16. The first fixed seat 11 and the second fixed seat 12 are both fixed on the same side of the bottom frame 16, and all the wheel assemblies 2 are installed on the lower surface of the bottom frame 16. The wheel assembly 2 is a universal wheel assembly, and the structure of this universal wheel assembly is an existing mature technology and can be purchased on the market.

[0027] Referring to Figures 1 to 3 , the centrifuge 100 adopts such a structural form that the centrifuge 100 is convenient to be towed by a chain power element and move along a set path in the factory building. As Figure 2As shown in the figure, the movement path of the centrifuge 100 can be designed as an oval. The first connecting members 13 and the second connecting members 15 of all the centrifuges 100 are connected to the corresponding links on the main chain 81 through bolt assemblies. The main chain 81 is connected between two sprockets 82. By driving one of the sprockets 82 to rotate with a motor, the main chain 81 can be made to move along an oval path, so that all the centrifuges 100 connected to the chain can perform circular motion along an oval path. On the left and right parts of this path, a polyurethane foam pouring machine and a drying device can be respectively arranged. When the centrifuge 100 moves to the working area of the polyurethane foam pouring machine, the foaming raw material can be poured into the centrifugal mold 4 of the centrifuge 100. After the pouring is completed, the centrifugal mold 4 is closed, and then the centrifugal drive 32 can drive the centrifugal mold 4 to rotate to form a polyurethane tire blank in the centrifugal mold 4. When the rotating centrifugal mold 4 moves to the working area of the drying device along with the centrifuge 100, the foaming raw material inside it is slowly cured. After the centrifuge 100 leaves the working area of the drying device, the operator can open the centrifugal mold 4 and take out the polyurethane tire blank inside. Then when the centrifuge 100 moves to the working area of the polyurethane foam pouring machine again, the next round of operation is carried out. Compared with the prior art, with such an arrangement, the number of centrifuges 100 in the entire production line is no longer limited by the working radius of the polyurethane foam pouring machine, and the user can increase the number of centrifuges 100 in the entire production line according to the actual situation, which is beneficial to improving production efficiency.

[0028] Referring to Figure 1 With Figure 4 , a table top plate 17 is fixed on the vehicle frame 1, a bearing seat 33 is fixed on the table top plate 17, a rotating shaft 311 inserted into the bearing seat 33 is fixed on the turntable 31, and a bearing 34 is sleeved between the bearing seat 33 and the rotating shaft 311. The centrifugal drive 32 includes a motor installed on the table top plate 17, and the output shaft of the motor is connected to the rotating shaft 311.

[0029] Referring to Figure 5 With Figure 6 , the centrifugal mold 4 includes a lower mold 41 and an upper mold 42. The lower mold 41 is fixed on the turntable 31 by screws. The upper mold 42 is arranged to be openable and closable. A first annular groove 411 is provided on the upper surface of the lower mold 41, a second annular groove 421 corresponding to the first annular groove 411 is provided on the lower surface of the upper mold 42, a mold cavity 43 is formed between the first annular groove 411 and the second annular groove 421, a material injection hole 422 is provided in the middle of the upper mold 42, a transition surface 4201 located between the material injection hole 422 and the second annular groove 421 is provided on the lower surface of the upper mold 42, and a feeding gap 44 is formed between the transition surface 4201 and the lower mold 41. A flash gap 45 surrounding the outside of the mold cavity 43 and communicating with the mold cavity 43 is also provided between the upper mold 42 and the lower mold 41.

[0030] Preferably, the width of the flash gap 45 is smaller than that of the feeding gap 44. The width of the flash gap 45 is 0.1 - 0.8 mm, such as 0.15 mm, 0.3 mm, 0.5 mm, 0.7 mm, etc., and the width of the feeding gap 44 is 0.8 - 3 mm, such as 0.8 mm, 1.3 mm, 2 mm, 2.5 mm, etc.

[0031] The injection hole 422 is generally a round hole for pouring polyurethane foaming material. When the centrifugal mold 4 rotates, the polyurethane foaming material injected from the injection hole 422 is thrown into the mold cavity 43, the feeding gap 44, and the flash gap 45 by the centrifugal force during rotation. After heating, the foaming material finally located in the mold cavity 43 will form a polyurethane tire blank, and the foaming material located in the feeding gap 44 and the flash gap 45 will form a flash. By setting the widths of these two gaps, the thickness of the flash can be controlled, enabling the flash to be in a straight state, facilitating the removal of the flash and avoiding the situation where the flash is too thin to be removed. In addition, the setting of the flash gap 45 can play a role in exhausting gas to a certain extent. When the polyurethane foaming material enters the mold cavity 43, most of the air in the mold cavity 43 will be discharged through the feeding gap 44. When the mold cavity 43 is about to be filled with the polyurethane foaming material, at this time, the feeding gap 44 may have been blocked, and the remaining small amount of gas can be squeezed into the flash gap 45. In the case where no sealing structure is provided between the upper mold 42 and the lower mold 41, it can finally be discharged from the tiny gap between the upper mold 42 and the lower mold 41.

[0032] After the polyurethane tire blank in the mold cavity 43 is heated and cured, the upper mold 42 can be opened, and then the polyurethane tire blank can be taken out. To prevent the upper mold 42 from detaching from the lower mold 41 after being opened, the upper mold 42 and the lower mold 41 can be connected by a hinge on one side, and at the same time, the upper mold 42 and the lower mold 41 can be locked by a bolt, a screw, or a buckle assembly on the other side.

[0033] Refer to Figure 6 In a preferred embodiment of the present invention, referring to

[0034] The material injection hole 422 is a conical hole that gradually expands from top to bottom, or the material injection hole 422 is in the shape of an inverted funnel hole. Among them, the inverted funnel hole shape is the best. With such a design, when the mold rotates, it is convenient for the liquid polyurethane foam material to enter the mold cavity 43 through the feed gap 44.

[0035] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A polyurethane tire centrifuge, characterized in that, It includes a vehicle frame (1), a plurality of wheel assemblies (2) arranged at the bottom of the vehicle frame (1), a turntable (31) rotatably arranged on the vehicle frame (1), a tire centrifugal mold (4) installed on the turntable (31), and a centrifugal driver (32) capable of driving the turntable (31) and the tire centrifugal mold (4) to rotate together. A first fixing seat (11) and a second fixing seat (12) which are separated from each other are fixed on one side of the vehicle frame (1). The first fixing seat (11) is hinged with a first connecting piece (13), and the second fixing seat (12) is hinged with a rotating arm (14). The other end of the rotating arm (14) opposite to the second fixing seat (12) is hinged with a second connecting piece (15).

2. The polyurethane tire centrifuge according to claim 1, wherein Both the first connecting piece (13) and the second connecting piece (15) have a connecting plate (101), and a plurality of through holes (102) for installing fasteners are arranged on the connecting plate (101).

3. A polyurethane tire centrifuge according to claim 1, characterized in that, The vehicle frame (1) includes a bottom frame (16). Both the first fixing seat (11) and the second fixing seat (12) are fixed on the same side of the bottom frame (16), and all the wheel assemblies (2) are installed on the lower surface of the bottom frame (16).

4. A polyurethane tire centrifuge according to claim 1, characterized in that, The wheel assembly (2) is a universal wheel assembly.

5. A polyurethane tire centrifuge according to claim 1, characterized in that, A table top plate (17) is fixed on the vehicle frame (1), a bearing seat (33) is fixed on the table top plate (17), a rotating shaft (311) inserted into the bearing seat (33) is fixed on the turntable (31), and a bearing (34) is sleeved between the bearing seat (33) and the rotating shaft (311).

6. A polyurethane tire centrifuge according to claim 5, characterized in that, The centrifugal driver (32) includes a motor installed on the table top plate (17), and the output shaft of the motor is connected to the rotating shaft (311).

7. A polyurethane tire centrifuge according to claim 1, characterized in that, The centrifugal mold (4) includes a lower mold (41) and an upper mold (42). A first annular groove (411) is arranged on the upper surface of the lower mold (41), a second annular groove (421) corresponding to the first annular groove (411) is arranged on the lower surface of the upper mold (42), a mold cavity (43) is formed between the first annular groove (411) and the second annular groove (421), a material injection hole (422) is arranged in the middle of the upper mold (42), a transition surface (4201) located between the material injection hole (422) and the second annular groove (421) is arranged on the lower surface of the upper mold (42), and a feeding gap (44) is formed between the transition surface (4201) and the lower mold (41).

8. A polyurethane tire centrifuge according to claim 7, characterized in that, A flash gap (45) which surrounds the outside of the mold cavity (43) and is communicated with the mold cavity (43) is further arranged between the upper mold (42) and the lower mold (41).

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