Bicycle rim pre-forming die

Abstract

The utility model relates to the technical field of rim dies, and discloses a bicycle rim pre-forming die which comprises an upper die plate, a lower die plate and a die core, four inserting holes are formed in the edge of the lower die plate and the edge of the die core in an array mode, four positioning rods are arranged on the outer surface of the bottom of the upper die plate in an array mode, and the positioning rods are arranged on the outer surface of the bottom of the lower die plate in an array mode. Limiting rods are movably inserted into the outer surfaces of the four fixing cavities correspondingly, pulling plates are fixedly connected to the outer surfaces of the limiting rods, four first springs are fixedly connected to the outer surface of the lower die plate in a circumferential array mode, and the four first springs are arranged on the outer surfaces of the four limiting rods in a sleeving mode correspondingly. And limiting holes are formed in the outer surfaces of the four positioning rods. According to the bicycle rim pre-forming die, the inserting holes and the positioning rods are arranged and matched with the limiting rods, the first springs, the limiting holes and the second springs, so that the effects that the die can be rapidly positioned and disassembled, and the working efficiency is greatly improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel rim moulds, in particular to a bicycle wheel rim preforming mould. Background Art

[0002] Traditional wheel rim molds use guide pins and guide sleeves to position the upper and lower molds. Since the guide pins and guide sleeves are often not completely aligned with the upper and lower molds during actual operation, it is often necessary to manually knock the guide pins or guide sleeves to position the upper and lower molds.

[0003] The existing patent technology (Announcement No.: CN213079766U) discloses a wheel rim forming mold that is easy to position, including an upper template, a mold core and a lower template that are arranged in sequence, a positioning block is arranged between the lower template and the mold core for positioning the lower template and the mold core, a positioning block installation groove is arranged on the lower template, a part of the positioning block is arranged in the positioning block installation groove, a positioning block alignment groove is arranged at a position corresponding to the positioning block installation groove on the lower end face of the mold core facing the lower template, and the remaining part of the positioning block is accommodated in the positioning block alignment groove, and the upper template is buckled on the mold core and covers the upper end face of the mold core. The wheel rim forming mold that is easy to position provided by the utility model replaces the role of the guide column by setting the positioning block, and is positioned by the structure of the positioning block, the mold core and the lower template. The upper template is buckled to the upper end face of the mold core, and there is no need to directly connect the upper and lower templates and the mold core through the guide column, so the positioning is more convenient and the damage to the mold core caused by the use of the guide column is avoided.

[0004] The above patented technology avoids the problem that in traditional wheel rim molds, the guide column often needs to be knocked or struck to insert the positioning column, which easily causes damage to the mold (especially the mold core) and affects the wheel rim molding. However, in actual use, it is still necessary to fix the upper mold and the lower mold with bolts, and more bolts need to be installed when installing and demolding the mold. When demolding, a crowbar is required to demold, resulting in low efficiency of mold installation and demolding. Therefore, a bicycle wheel rim preforming mold is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a bicycle wheel rim preforming die to solve the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bicycle wheel rim preforming mold, comprising an upper mold plate, a lower mold plate and a mold core, the edges of the lower mold plate and the mold core are each provided with four insertion holes in an array, the bottom outer surface of the upper mold plate is provided with four positioning rods in an array, the interior of the lower mold plate is provided with four fixed cavities, the outer surfaces of the four fixed cavities are each movably inserted with limiting rods, the outer surfaces of the limiting rods are fixedly connected to pull plates, the outer surface of the lower mold plate is fixedly connected to four first springs in a circumferential array, the outer surfaces of the other ends of the four first springs are respectively fixedly connected to the four pull plates, the four first springs are respectively sleeved on the outer surfaces of the four limiting rods, and the outer surfaces of the four positioning rods are each provided with limiting holes.

[0007] Preferably, the internal spirals of the upper and lower templates are provided with cooling pipes, one end of the cooling pipes is fixedly connected to a water inlet pipe, and the end of the cooling pipes away from the water inlet pipe is fixedly connected to a water outlet pipe, and the outer surfaces of the upper and lower templates are provided with a plurality of heat sinks.

[0008] Preferably, two second springs are fixedly connected to the bottom inner surface of the fixed cavity, and a connecting plate is fixedly connected to the top outer surfaces of the two second springs.

[0009] By adopting the above technical solution, the positioning rod is inserted into the jack to press the connecting plate downward, so that the second spring is compressed, and the second spring is reset to pop out the positioning rod.

[0010] Preferably, the top outer surface of the limiting rod close to one end of the positioning rod is a smooth and inclined outer surface.

[0011] By adopting the above technical solution, a smooth and inclined outer surface is provided, which makes it easier for the positioning rod to squeeze the limiting rod.

[0012] Preferably, the positioning rod is matched with the insertion hole, and the limiting rod is matched with the limiting hole.

[0013] By adopting the above technical solution, the positioning hole is inserted into the insertion hole for positioning, and the limiting rod is inserted into the limiting hole for limiting the positioning rod.

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

[0015] 1. The bicycle wheel rim preforming mold can quickly position and disassemble the mold by arranging the insertion hole and the positioning rod, and cooperating with the limiting rod, the first spring, the limiting hole and the second spring, thereby greatly improving the working efficiency.

[0016] 2. The bicycle wheel rim preforming mold absorbs the heat inside the mold by injecting cooling water into the water inlet pipe, and cools the heat dissipation insert to a certain extent, so as to achieve the effect of quickly conducting the heat inside the wheel rim mold to the outside, with good cooling effect and improving the molding efficiency of the wheel rim. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the partial structure of the utility model in front view and section.

[0020] In the figure: 1. upper template; 2. lower template; 3. mold core; 4. plug hole; 5. positioning rod; 6. fixing cavity; 7. limiting rod; 8. pull plate; 9. first spring; 10. limiting hole; 11. second spring; 12. connecting plate; 13. water inlet pipe; 14. water outlet pipe; 15. heat sink. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] Please refer to Figure 1-3A bicycle wheel rim preforming mold comprises an upper mold plate 1, a lower mold plate 2 and a mold core 3. Four insertion holes 4 are arranged in an array at the edges of the lower mold plate 2 and the mold core 3. Four positioning rods 5 are arranged in an array on the bottom outer surface of the upper mold plate 1. The positioning rods 5 of the upper mold plate 1 are first inserted into the insertion holes 4 on the mold core 3, and then the positioning rods 5 are inserted into the insertion holes 4 on the lower mold plate 2. Four fixed cavities 6 are arranged inside the lower mold plate 2. The upper mold is pressed downward so that the positioning rods 5 are inserted into the fixed cavities 6. Two second springs 11 are fixedly connected to the bottom inner surface of the fixed cavity 6. A connecting plate 12 is fixedly connected to the top outer surface of the two second springs 11. The positioning rod 5 presses the connecting plate 12 downward so that the second spring 11 is compressed. Limiting rods 7 are movably inserted on the outer surfaces of the four fixed cavities 6. When the positioning rods 5 contact the limiting rods 7, , squeeze the limit rod 7, the outer surface of the limit rod 7 is fixedly connected with a pull plate 8, the outer surface of the lower template 2 is fixedly connected with four first springs 9 in a circular array, the outer surfaces of the other ends of the four first springs 9 are respectively fixedly connected to the four pull plates 8, and the four first springs 9 are respectively sleeved on the outer surfaces of the four limit rods 7. The outer surfaces of the four positioning rods 5 are all provided with limit holes 10. The positioning rod 5 squeezes the limit rod 7, so that the first spring 9 is deformed. When the limit rod 7 contacts the limit hole 10, the limit rod 7 is inserted into the limit hole 10 to limit the positioning rod 5. When it is disassembled, the pull plate 8 is pulled to cause the first spring 9 to be deformed, and the limit rod 7 is disengaged from the limit hole 10, and the positioning rod 5 is released from the limit. The second spring 11 is reset to drive the connecting plate 12 to move upward, and the positioning rod 5 is ejected, thereby facilitating demoulding.

[0024] Working principle: When the utility model is in use, first insert the positioning rod 5 of the upper template 1 into the socket 4 on the mold core 3, and then insert the positioning rod 5 into the socket 4 on the lower template 2, press the upper mold downward, so that the positioning rod 5 is inserted into the fixed cavity 6, and the positioning rod 5 presses the connecting plate 12 downward to compress the second spring 11. When the positioning rod 5 contacts the limiting rod 7, the limiting rod 7 is squeezed to deform the first spring 9. When the limiting rod 7 contacts the limiting hole 10, the limiting rod 7 is inserted into the limiting hole 10 to limit the positioning rod 5. When disassembling it, pull the pull plate 8 to deform the first spring 9, disengage the limiting rod 7 from the limiting hole 10, release the positioning rod 5, and the second spring 11 is reset to drive the connecting plate 12 to move upward, so that the positioning rod 5 pops out, thereby facilitating demoulding.

[0025] Compared with the related art, the bicycle wheel rim preforming mold provided by the utility model has the following beneficial effects: the mold can be quickly positioned and disassembled, thereby greatly improving the working efficiency.

[0026] Embodiment 2:

[0027] Please refer to Figure 1-3The upper template 1 and the lower template 2 are spirally provided with cooling pipes, one end of which is fixedly connected with a water inlet pipe 13. When the mold is in use, cooling water is injected from the water inlet pipe 13, and the cooling water passes through the mold to absorb the heat in the mold. The end of the cooling pipe away from the water inlet pipe 13 is fixedly connected with a water outlet pipe 14. The outer surfaces of the upper template 1 and the lower template 2 are provided with a plurality of heat sinks 15. After the cooling water passes through, the heat sink 15 will be cooled to a certain extent, thereby improving the heat absorption function of the heat sink 15, making the heat extraction speed very fast, improving the cooling effect, and accelerating the internal wheel rim forming speed. The cooling water is finally discharged through the water outlet pipe 14.

[0028] Working principle: When the mold is in use, cooling water is injected from the water inlet pipe 13. The cooling water passes through the mold to absorb the heat in the mold. After the cooling water passes through, the heat sink 15 is cooled to a certain extent, thereby improving the heat absorption function of the heat sink 15, making the heat extraction speed very fast, improving the cooling effect, and accelerating the internal wheel rim forming speed. The cooling water is finally discharged through the water outlet pipe 14.

[0029] Compared with the related art, the bicycle wheel rim preforming mold provided by the utility model has the following beneficial effects: it can quickly conduct the heat inside the wheel rim mold to the outside, has a good cooling effect, and improves the molding efficiency of the wheel rim.

[0030] The above-mentioned equipment is used in different ways for each device. It is selected and used according to actual conditions, and various parameters are referred to, in accordance with the functions of the equipment used and the effects achieved.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bicycle wheel rim preforming mold, comprising an upper mold plate (1), a lower mold plate (2) and a mold core (3), characterized in that: The edges of the lower template (2) and the mold core (3) are both provided with four insertion holes (4) in an array, the outer surface of the bottom of the upper template (1) is provided with four positioning rods (5) in an array, the interior of the lower template (2) is provided with four fixed cavities (6), the outer surfaces of the four fixed cavities (6) are each movably inserted with a limiting rod (7), the outer surface of the limiting rod (7) is fixedly connected to a pull plate (8), the outer surface of the lower template (2) is fixedly connected to four first springs (9) in a circumferential array, the outer surfaces of the other ends of the four first springs (9) are respectively fixedly connected to the four pull plates (8), the four first springs (9) are respectively sleeved on the outer surfaces of the four limiting rods (7), and the outer surfaces of the four positioning rods (5) are each provided with a limiting hole (10).

2. A bicycle wheel rim preforming die according to claim 1, characterized in that: The upper mold plate (1) and the lower mold plate (2) are spirally provided with cooling pipes inside, one end of the cooling pipes is fixedly connected to a water inlet pipe (13), and one end of the cooling pipes away from the water inlet pipe (13) is fixedly connected to a water outlet pipe (14), and the outer surfaces of the upper mold plate (1) and the lower mold plate (2) are both provided with a plurality of heat sinks (15).

3. A bicycle wheel rim preforming die according to claim 1, characterized in that: Two second springs (11) are fixedly connected to the bottom inner surface of the fixed cavity (6), and a connecting plate (12) is fixedly connected to the top outer surfaces of the two second springs (11).

4. A bicycle wheel rim preforming die according to claim 1, characterized in that: The top outer surface of the limiting rod (7) close to one end of the positioning rod (5) is a smooth and inclined outer surface.

5. A bicycle wheel rim preforming die according to claim 1, characterized in that: The positioning rod (5) is matched with the insertion hole (4), and the limiting rod (7) is matched with the limiting hole (10).

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