Sliding plate PU wheel forming die

Abstract

The utility model discloses a sliding plate PU wheel forming die. A lower die groove is formed in the upper surface of a lower die base, a positioning groove is formed in the position, located in the lower die groove, of the lower die base, an upper die base is matched with the lower die base, an upper die groove is formed in the lower surface of the upper die base, and a reinforcing boss is arranged in the center of the upper surface of the upper die base. A through hole is formed in the center of the upper die base and located on the reinforcing boss in a penetrating mode, a pouring hole is formed in one side of the upper die base, external threads are arranged on the upper portion of the hub positioning rod, an extension rod is further arranged on the upper portion, located on the external threads, of the hub positioning rod, a supporting plate is arranged at the bottom of the hub positioning rod, and the supporting plate corresponds to and is matched with a positioning groove in the lower die groove. The hub positioning rod penetrates through the upper die base and the through hole of the reinforcing boss, the internal thread sleeve is matched with the external thread on the upper portion of the hub positioning rod and is pressed on the upper surface of the reinforcing boss, and compared with a traditional die structure, the die is convenient to lift and demould, and compared with a traditional buckle type structure, operation convenience and efficiency are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PU wheel moulds, in particular to a skateboard PU wheel forming mould. Background Art

[0002] PU wheels are also called PU infusion wheels: Strictly speaking, PU is also a kind of plastic, but additives are added during the production process, which leads to better performance.

[0003] Most skateboard PU wheels are formed by artificial infusion, and the currently used molding mold has a column at the center position of the lower mold groove in order to fix the wheel hub, thereby achieving the fixation of the wheel hub. However, the existing skateboard PU wheel molding mold is difficult to separate, demolding is inconvenient, and there is no fulcrum, which makes it inconvenient to move. At the same time, the mold is generally closed by multiple buckles to achieve the fastening connection between the upper mold base and the lower mold base, which is inconvenient to operate and has low efficiency. Therefore, an improved technology is urgently needed to solve this problem existing in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a skateboard PU wheel forming mold, a positioning groove is opened in the lower mold groove of the lower mold seat, a through hole is opened in the upper mold seat, the hub positioning rod passes through the through hole of the upper mold seat and a support plate is arranged at the bottom to cooperate with the positioning groove in the lower mold groove, and the hub is supported and positioned by the hub positioning rod and the support plate. Compared with the traditional mold structure, it is convenient to lift the mold and demold, and at the same time, the upper mold seat and the lower mold seat are tightly matched through the cooperation of the internal thread sleeve and the external thread on the hub positioning rod. Compared with the traditional snap-on structure, the operation convenience and efficiency are greatly improved, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a skateboard PU wheel forming mold, including a lower mold base, an upper mold base, a wheel hub positioning rod and an internal threaded sleeve;

[0006] The upper surface of the lower die base is provided with a lower die groove, the lower die base is provided with a positioning groove in the lower die groove, and the upper surface of the lower die base is provided with a plurality of positioning guide rods;

[0007] The upper die seat cooperates with the lower die seat, an upper die groove is provided on the lower surface of the upper die seat, the upper die groove cooperates with the lower die groove, a plurality of guide holes are provided on the lower surface of the upper die seat, the guide holes correspond to the positioning guide rods one by one and cooperate with each other, a reinforcing boss is provided at the center position of the upper surface of the upper die seat, a through hole is provided at the center position of the upper die seat and located at the reinforcing boss, a pouring hole is provided on one side of the upper die seat, and an exhaust hole is provided on the other side of the upper die seat, and the pouring hole and the exhaust hole are both communicated with the upper die groove;

[0008] The upper part of the hub positioning rod is provided with an external thread. An extension rod is also provided on the upper part of the hub positioning rod located at the external thread part. A support plate is provided at the bottom of the hub positioning rod. The support plate corresponds to and cooperates with the positioning groove in the lower die groove. The periphery of the support plate is correspondingly and smoothly matched with the lower die groove. The hub positioning rod passes through the through hole of the upper die base;

[0009] The internal thread sleeve is matched with the external thread on the upper part of the hub positioning rod, and the bottom of the internal thread sleeve is pressed on the upper surface of the strengthening boss.

[0010] Preferably, for a skateboard PU wheel forming die provided by the present utility model, an extension plate is provided on the periphery of the upper part of the lower die base.

[0011] Preferably, for a skateboard PU wheel forming die provided by the present utility model, a pouring joint is provided on the upper surface of the upper die base and at the pouring hole.

[0012] Preferably, for a skateboard PU wheel forming die provided by the present utility model, exhaust grooves are provided on the side surfaces of the upper die base located at the guide holes.

[0013] Preferably, for a skateboard PU wheel forming die provided by the present utility model, anti-slip lines are provided on the outer surfaces of the extension rod and the internal thread sleeve along the length direction.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] (1) A positioning groove is provided in the lower die groove of the lower die base, and a through hole is provided in the upper die base. The hub positioning rod passes through the through hole of the upper die base and a support plate is provided at the bottom to cooperate with the positioning groove in the lower die groove. The support and positioning of the hub are realized through the hub positioning rod and the support plate. Compared with the traditional die structure, it is convenient to lift the die and facilitate demolding.

[0016] (2) The upper die base and the lower die base are tightly fitted through the cooperation of the internal thread sleeve and the external thread on the hub positioning rod. Compared with the traditional snap-fastening structure, the operation convenience and efficiency are greatly improved. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is the cross-sectional structural schematic diagram of the lower die base;

[0019] Figure 3 is the cross-sectional structural schematic diagram of the upper die base;

[0020] Figure 4 is the structural schematic diagram of the hub positioning rod;

[0021] Figure 5This is a schematic diagram of the external structure of the utility model.

[0022] In the figure: lower die base 1, upper die base 2, hub positioning rod 3, internal thread sleeve 4, lower die groove 5, positioning groove 6, positioning guide rod 7, upper die groove 8, guide hole 9, strengthening boss 10, through hole 11, pouring hole 12, exhaust hole 13, external thread 14, extension rod 15, support plate 16, extension plate 17, pouring joint 18, exhaust groove 19. Specific implementation mode

[0023] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0024] It should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0025] Please refer to Figures 1-5 , the present utility model provides a technical solution: a skateboard PU wheel forming die, including a lower die base 1, an upper die base 2, a hub positioning rod 3 and an internal thread sleeve 4;

[0026] The upper surface of the lower die base 1 is provided with a lower die groove 5. The lower die base 1 is provided with a positioning groove 6 inside the lower die groove 5. The upper surface of the lower die base 1 is provided with a plurality of positioning guide rods 7. The periphery of the upper part of the lower die base 1 is provided with an extension plate 17. One is to facilitate pressing the lower die base 1 during demoulding, so as to facilitate the separation of the upper die base 2, and the other is to facilitate the cooperation in taking the die after mold closing;

[0027] The upper die base 2 is matched with the lower die base 1. The lower surface of the upper die base 2 is provided with an upper die groove 8, and the upper die groove 8 is matched with the lower die groove 5. The lower surface of the upper die base 2 is provided with a plurality of guide holes 9, and the guide holes 9 correspond to and are matched with the positioning guide rods 7 one by one. Exhaust grooves 19 are provided on the side surfaces of the upper die base 2 where the guide holes 9 are located to ensure the smoothness when the positioning guide rods 7 are inserted into the guide holes 9. A reinforcing boss 10 is arranged at the center position of the upper surface of the upper die base 2. A through hole 11 is penetrated and provided at the center position of the upper die base 2 and at the position of the reinforcing boss 10. A pouring hole 12 is provided on one side of the upper die base 2. A pouring joint 18 is arranged on the upper surface of the upper die base 2 at the position of the pouring hole 12 to facilitate the matching with the gun head of the pouring gun, so that the PU material can be better injected into the mold cavity from the pouring hole 12. An exhaust hole 13 is provided on the other side of the upper die base 2. The pouring hole 12 and the exhaust hole 13 are both communicated with the upper die groove 8;

[0028] External threads 14 are provided on the upper part of the hub positioning rod 3. An extension rod 15 is further provided on the upper part of the hub positioning rod 3 where the external threads 14 are located. A support plate 16 is provided at the bottom of the hub positioning rod 3. The support plate 16 corresponds to and is matched with the positioning groove 6 in the lower die groove 5. The periphery of the support plate 16 is matched with the lower die groove 5 in a conforming manner. The hub positioning rod 3 is inserted through the through hole 11 of the upper die base 2;

[0029] The internal thread sleeve 4 is matched with the external threads 14 on the upper part of the hub positioning rod 3. The bottom of the internal thread sleeve 4 is pressed on the upper surface of the reinforcing boss 10. Anti-slip threads are provided on the outer surfaces of the extension rod 15 and the internal thread sleeve 4 along the length direction to facilitate hand gripping and anti-slip, so as to facilitate the rotation of the internal thread sleeve 4.

[0030] Usage method and principle: First, put the wheel hub on the wheel hub positioning rod 3 and slide it to the bottom. Then, pass the upper part of the wheel hub positioning rod 3 upward through the through hole 11 of the upper die base 2. Subsequently, insert the supporting plate 16 at the bottom of the wheel hub positioning rod 3 into the positioning groove 6 of the lower die groove 5. At the same time, align the guiding hole 9 of the upper die base 2 with the positioning guiding rod 7 of the lower die base 1 to connect the upper die base 2 and the lower die base 1. Then, put the internal thread sleeve 4 on the wheel hub positioning rod 3 and thread it with the external thread 14 part of the wheel hub positioning rod 3. Rotate the internal thread sleeve 4 to press the internal thread sleeve 4 against the reinforcing boss 10, so that the upper die base 2 and the lower die base 1 are closely fitted to complete the mold closing. At this time, the wheel hub is located in the mold cavity formed by the upper die groove 8 and the lower die groove 5. Inject the PU material into the mold cavity formed by the upper die groove 8 and the lower die groove 5 through the pouring gun until the PU material slightly overflows from the exhaust hole 13. Then, lift the molding die by the extension rod 15 and place it on the oven tray, and place it in the oven for heating and forming. After forming, take the die out of the oven, turn the internal thread sleeve 4, and lift the wheel hub positioning rod 3 by the extension rod 15. At this time, the upper die base 2 and the PU wheel are lifted together. Finally, after pulling out the wheel hub positioning rod 3 from below, demold the PU wheel from the upper die groove 8 of the upper die base 2. The structure of the utility model is reasonable. The positioning groove 6 is provided in the lower die groove 5 of the lower die base 1, and the through hole 11 is provided in the upper die base 2. The wheel hub positioning rod 3 passes through the through hole 11 of the upper die base 2 and a supporting plate 16 is arranged at the bottom to cooperate with the positioning groove 6 in the lower die groove 5. The support and positioning of the wheel hub are realized through the wheel hub positioning rod 3 and the supporting plate 16. Compared with the traditional die structure, it is convenient to lift the die and demold. The upper die base 2 and the lower die base 1 are closely fitted through the cooperation of the internal thread sleeve and the external thread on the wheel hub positioning rod 3. Compared with the traditional snap structure, the operation convenience and efficiency are greatly improved.

[0031] Where the utility model is not described in detail, it is the well-known technology of those skilled in the art.

[0032] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solutions of the utility model can be modified and equivalently replaced without departing from the spirit and scope of the technical solutions of the utility model, and they should all be covered within the scope of the claims of the utility model.

Claims

1. A skateboard PU wheel forming mold, characterized by: It comprises a lower die base (1), an upper die base (2), a wheel hub positioning rod (3) and an internal thread sleeve (4); The upper surface of the lower die base (1) is provided with a lower die groove (5), the lower die base (1) is located in the lower die groove (5) and is provided with a positioning groove (6), and the upper surface of the lower die base (1) is provided with a plurality of positioning guide rods (7); The upper die seat (2) cooperates with the lower die seat (1), an upper die groove (8) is provided on the lower surface of the upper die seat (2), the upper die groove (8) cooperates with the lower die groove (5), a plurality of guide holes (9) are provided on the lower surface of the upper die seat (2), the guide holes (9) correspond to the positioning guide rods (7) one by one and cooperate with each other, a reinforcing boss (10) is provided at the center position of the upper surface of the upper die seat (2), a through hole (11) is provided at the center position of the upper die seat (2) and is located at the reinforcing boss (10), a pouring hole (12) is provided on one side of the upper die seat (2), and an exhaust hole (13) is provided on the other side of the upper die seat (2), and the pouring hole (12) and the exhaust hole (13) are both communicated with the upper die groove (8); The upper part of the wheel hub positioning rod (3) is provided with an external thread (14), and the upper part of the wheel hub positioning rod (3) is also provided with an extension rod (15), and the bottom of the wheel hub positioning rod (3) is provided with a support plate (16), and the support plate (16) corresponds to and cooperates with the positioning groove (6) in the lower die groove (5), and the outer periphery of the support plate (16) corresponds to and matches the lower die groove (5), and the wheel hub positioning rod (3) is passed through the through hole (11) of the upper die seat (2); The internal thread sleeve (4) cooperates with the external thread (14) on the upper part of the wheel hub positioning rod (3), and the bottom of the internal thread sleeve (4) is pressed onto the upper surface of the reinforcing boss (10).

2. A skateboard PU wheel forming mold according to claim 1, characterized in that: An extension plate (17) is arranged on the periphery of the upper part of the lower die base (1).

3. The skateboard PU wheel forming mold according to claim 1, characterized in that: A pouring joint (18) is provided on the upper surface of the upper mold base (2) and located at the pouring hole (12).

4. The skateboard PU wheel forming mold according to claim 1, characterized in that: The upper die seat (2) is provided with exhaust grooves (19) on the side surfaces of the guide hole (9).

5. The skateboard PU wheel forming mold according to claim 1, characterized in that: The outer surfaces of the extension rod (15) and the internally threaded sleeve (4) are both provided with anti-slip grooves along the length direction.

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