One-step forming die for baby carriage tire processing

Abstract

The utility model relates to the technical field of baby carriage tire forming molds, and discloses a one-step forming mold for baby carriage tire processing, which comprises a fixed mold and a movable mold, a left mold cavity is arranged on one side of the fixed mold close to the movable mold, a left hub seat is arranged in the center of the left mold cavity, a forming blocking sleeve is sleeved outside the left hub seat, and limiting convex seats are arranged at four corners of one side of the fixed mold close to the movable mold. The movable mold is slidably mounted on the limiting rods, a right mold cavity is formed in the side, close to the fixed mold, of the movable mold, a right hub seat is arranged in the center of the right mold cavity, a bottom plate is fixedly connected to the right side of the movable mold, the bottom plate is slidably mounted on the four limiting rods, and an electric air cylinder is fixedly mounted on the right side face of the bottom plate; according to the utility model, different components made of different materials in the baby carriage tire are subjected to injection molding processing in one mold, so that the integrity of the baby carriage tire is improved, the production line is reduced, the production, transportation and storage cost of the hub component is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stroller tire forming molds, in particular to a one-time forming mold for stroller tire processing. Background Technique

[0002] With the continuous improvement of people's requirements for the quality of life, the requirements for the quality and safety of strollers are also getting higher and higher. The tire structure of traditional strollers is complex and requires separate production and processing of the outer tire, inner tire and hub, and then assembly of each component. This not only requires multiple processing production lines to be set up, but also an assembly production line. The labor, transportation and warehousing costs are high. While the production efficiency is low, there may be problems with loose connections between the assembled parts, the product quality cannot be guaranteed, and there are also some potential safety hazards. Therefore, the stroller tires produced by traditional production processes are gradually replaced by integrally molded injection-molded tires, and a mold that can complete the one-time molding of tires is needed.

[0003] For example, the patent document CN212288517U discloses a tire mold and an anti-deflation stroller wheel produced by it. The tire mold includes an upper back plate, an upper mold, a lower mold and a lower back plate. A mold cavity is arranged in the lower mold, a lower hub seat is arranged in the middle of the mold cavity, a lower mold sealing ring and a vacuum pumping port connected to the mold cavity are arranged on the lower mold, and the vacuum pumping port is connected to a vacuum pump to help remove the residual gas in the mold cavity. The anti-deflation stroller wheel includes a hub and a tire. An annular arc cavity is arranged in the hub, and an inner shell is arranged in the annular arc cavity. When producing the wheel, first place the formed hub in the lower hub seat, and the tire is integrally formed on the formed hub; however, there are still many deficiencies in this prior art. For example, the hub and the tire skin cannot be injection-molded in the same mold, and the hub parts need to be purchased separately or separate molds and production lines need to be set up, which increases the production and transportation costs. At the same time, it is not convenient to quickly change the color of the tire material according to requirements, the production is not flexible and rich enough, and the production efficiency is reduced. Content of the Utility Model

[0004] The purpose of the utility model is to provide a one-time forming mold for stroller tire processing to solve the problems raised in the above background technique.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A one - time forming mold for processing baby carriage tires, including a fixed mold and a movable mold. On one side of the fixed mold close to the movable mold, a left mold cavity is provided. In the center of the left mold cavity, there is a left hub seat. An outer sleeve of the left hub seat is provided with a forming barrier sleeve. At four corners on one side of the fixed mold close to the movable mold, there are all provided with limit convex seats. On each of the four limit convex seats, a limit rod is fixedly connected. The movable mold is slidably installed on the limit rods. At four corners on one side of the movable mold close to the fixed mold, there are all provided with limit grooves. In each of the four limit grooves, a limit hole is provided. On one side of the movable mold close to the fixed mold, a right mold cavity is provided. In the center of the right mold cavity, there is a right hub seat. On the right side of the movable mold, a bottom plate is fixedly connected. The bottom plate is slidably installed on the four limit rods, and an electric cylinder is fixedly installed on the right side surface of the bottom plate.

[0006] As a further improvement to the above - mentioned solution, a ring - shaped push plate is provided at the right end of the forming barrier sleeve. Along the circumference at the left end of the forming barrier sleeve, there are four sliding pieces. The left ends of the four sliding pieces pass through the fixed mold and are fixed with a pressing plate.

[0007] As a further improvement to the above - mentioned solution, the left ends of the four limit rods and the four limit holes are in interference fit, and limit sleeves are installed on the right sides of the four limit rods.

[0008] As a further improvement to the above - mentioned solution, at four corners on the left side surface of the fixed mold, there are all provided with fixed grooves. In the center of each of the four fixed grooves, a threaded hole is provided. On the top surface of the fixed mold, a first injection port and a second injection port are provided. On the front surface of the fixed mold, a first water inlet and a first water outlet are provided. At a position in the fixed mold far from the left mold cavity, a left water - cooling pipe is provided.

[0009] As a further improvement to the above - mentioned solution, on the top surface of the movable mold, a vacuum extraction port is provided. On the front surface of the movable mold, a second water inlet and a second water outlet are provided. At a position in the movable mold far from the right mold cavity, a right water - cooling pipe is provided.

[0010] As a further improvement to the above - mentioned solution, an exhaust groove is provided on the outside of the left mold cavity, and a sealing ring is provided on the outside of the right mold cavity.

[0011] As a further improvement to the above - mentioned solution, a push - plate groove is provided on the outside of the left hub seat, and bearing seats are provided in the centers of both the left hub seat and the right hub seat.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. The utility model is provided with a formed barrier sleeve sleeved outside the left hub seat. An annular push plate is arranged at the right end of the formed barrier sleeve. Four sliding pieces are arranged along the circumference at the left end of the formed barrier sleeve. The left ends of the four sliding pieces pass through the fixed mold and are fixed with a pressing plate. The pressing plate is connected with an electric push rod and a distance sensor. A push plate groove is arranged on the outer side of the left hub seat. When injecting and molding a baby carriage tire, the formed barrier sleeve first cooperates with the mold cavity for injection molding to form a hub, and then the formed barrier sleeve is retracted for injection molding of the tire tread. When the formed barrier sleeve is retracted, the annular push plate cooperates with the push plate groove to avoid defects on the tire surface. With this structure, different components are injection molded with different materials in one mold, which not only improves the processing technology and production efficiency, but also makes the combination of each component closer through this integrated molding, thus improving the product quality. Further, after the tire injection molding is completed, the annular push plate can push out the tire to help the tire demold and complete the one-time molding of the tire. The same structure produces different technical effects in different production stages and has multiple functions without adding structures.

[0014] 2. The utility model is provided with a first water inlet and a first water outlet on the front surface of the fixed mold. After the injection molding is completed, cooling water flows in from the first water inlet and flows out from the first water outlet. A left water cooling pipe is arranged at a position in the fixed mold far from the left mold cavity. A second water inlet and a second water outlet are arranged on the front surface of the moving mold. A right water cooling pipe is arranged at a position in the moving mold far from the right mold cavity. After the injection molding is completed, cooling water flows in from the second water inlet and flows out from the second water outlet. By controlling the temperature and flow rate of the cooling water, the cooling time of the injection molded part can be conveniently controlled, which can be adjusted according to the performance of the injection molding material to achieve the purpose of reducing the injection molding cycle and improving the production efficiency. At the same time, an appropriate cooling time can also improve the quality of the injection molded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the first perspective of the present utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the second perspective of the present utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the present utility model when the tire is not demolded;

[0019] Figure 4 It is a cross-sectional view of the present utility model;

[0020] Figure 5 This is a partial cross-sectional view of the present utility model;

[0021] Figure 6 This is a schematic structural view of the forming barrier sleeve in the present utility model.

[0022] In the figure: 1, fixed mold; 101, left mold cavity; 102, left hub seat; 103, limit convex seat; 104, fixed groove; 105, threaded hole; 106, first injection port; 107, second injection port; 108, first water inlet; 109, first water outlet; 110, left water cooling pipe; 111, exhaust groove; 112, push plate groove; 2, moving mold; 201, limit groove; 202, limit hole; 203, right mold cavity; 204, right hub seat; 205, second water inlet; 206, second water outlet; 207, right water cooling pipe; 208, sealing ring; 209, vacuum pumping port; 3, forming barrier sleeve; 301, annular push plate; 302, sliding piece; 303, pressing plate; 401, limit sleeve; 4, limit rod; 5, bottom plate; 6, electric cylinder; 7, bearing seat. Specific embodiments

[0023] Next, the technical solutions in the embodiments 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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0024] A one-time forming mold for processing baby carriage tires, as Figures 1 to 6 shown, includes a fixed mold 1 and a moving mold 2. A left mold cavity 101 is provided on the side of the fixed mold 1 close to the moving mold 2. There is a left hub seat 102 at the center of the left mold cavity 101. A bearing seat 7 is provided at the center of the left hub seat 102. During processing, a bearing is installed on the bearing seat 7, and then injection molding is carried out to make the bearing and the hub combine tightly to improve the integrity of the wheel. A forming barrier sleeve 3 is sleeved outside the left hub seat 102. During processing, the forming barrier sleeve 3 cooperates with the mold cavity for injection molding to form a hub, and then it is retracted for the injection molding processing of the tire tread. An annular push plate 301 is provided at the right end of the forming barrier sleeve 3. After the tire injection molding and cooling are completed, the annular push plate 301 pushes out the tire to assist in tire demolding. Four sliding pieces 302 are provided along the circumference at the left end of the forming barrier sleeve 3. The left ends of the four sliding pieces 302 pass through the fixed mold 1 and are fixed with a pressing plate 303. The pressing plate 303 is connected to an electric push rod and a distance sensor to control the expansion and contraction of the forming barrier sleeve 3 to complete the one-time forming of the tire. A push plate groove 112 is provided on the outside of the left hub seat 102. When the forming barrier sleeve 3 is retracted, the annular push plate 301 cooperates with the push plate groove 112 to avoid defects on the tire surface.

[0025] As Figure 1 shown, on the four corners of the fixed mold 1 near the moving mold 2, there are limit convex seats 103. On each of the four limit convex seats 103, a limit rod 4 is fixedly connected. The left ends of the four limit rods 4 are in interference fit with the four limit holes 202. Interference fit means that the tolerance zone of the hole is below the tolerance zone of the shaft. By using the elasticity of the material, the hole is expanded and deformed to fit over the shaft. Its characteristics are simple structure, good centering property, and high bearing capacity. The moving mold 2 is slidably installed on the limit rods 4. On the right side of each of the four limit rods 4, a limit sleeve 401 is installed. The limit sleeve 401 prevents the moving mold 2 from sliding out of the limit rods 4 and avoids causing damage to the mold.

[0026] As Figure 2 and Figure 4 shown, on the four corners of the moving mold 2 near the fixed mold 1, there are limit grooves 201. In each of the four limit grooves 201, a limit hole 202 is provided. The limit grooves 201 cooperate with the limit convex seats 103 to prevent the moving mold 2 from being misaligned and affecting the injection molding quality. On the side of the moving mold 2 near the fixed mold 1, a right mold cavity 203 is provided. In the center of the right mold cavity 203, there is a right hub seat 204. In the center of the right hub seat 204, there is a bearing seat 7. On the right side of the moving mold 2, a bottom plate 5 is fixedly connected. The main function of the bottom plate is to provide sufficient stiffness and stability, protect the moving mold 2, and prevent the moving mold 2 from being deformed under force during mold closing and affecting the injection molding quality. The bottom plate 5 is slidably installed on the four limit rods 4. On the right side surface of the bottom plate 5, an electric cylinder 6 is fixedly installed. The electric cylinder 6 pushes the bottom plate 5 to complete mold closing. After injection molding and cooling, the bottom plate 5 is retracted to facilitate the removal of the tire finished product.

[0027] As Figures 1 to 4 shown, on the four corners of the left side surface of the fixed mold 1, there are fixed grooves 104. In the center of each of the four fixed grooves 104, a threaded hole 105 is provided. The fixed grooves 104 and the threaded holes 105 facilitate the stable fixation of the fixed mold 1 on the injection molding clamping mechanism. An exhaust groove 111 is provided on the outside of the right mold cavity. During injection molding, the exhaust groove 111 facilitates the discharge of the air in the mold cavity and prevents the air in the cavity from affecting the injection molding quality. On the top surface of the fixed mold 1, a first injection port 106 and a second injection port 107 are provided. The first injection port 106 is internally connected to the forming barrier sleeve 3, and the hub is formed by injection molding.

[0028] As Figure 2 shown, a sealing ring 208 is provided on the outside of the left mold cavity. The sealing ring 208 helps to isolate the mold cavity from the outside during mold closing and prevents the molten injection material from overflowing. On the top surface of the moving mold 2, a vacuum pumping port 209 is provided. The vacuum pumping port 209 is connected to a vacuum pump. During injection molding, suction is carried out outward to reduce the air bubbles in the formed tire and improve the quality of the injection molded tire.

[0029] During the operation of Embodiment 1, the left side of the fixed mold 1 is fixed on the injection molding machine. The bearing is placed on the bearing seat 7. The moving mold 2 is pushed leftward by the electric cylinder 6 so that the fixed mold 1 and the moving mold 2 are closed to form a complete injection mold cavity. Then, the forming barrier sleeve 3 is pushed rightward to cooperate with the moving mold 2 to form a wheel hub injection mold cavity. The wheel hub forming material is injected into the mold cavity from the first injection port 106. At the same time, a vacuum pump is used to exhaust air outward. After the injection is completed, the forming barrier sleeve 3 is pulled leftward so that the annular push plate 301 cooperates with the push plate groove 112. The tire skin injection material is injected into the mold cavity from the second injection port 107. At the same time, a vacuum pump is used to exhaust air outward. After the tire skin is completely formed, the moving mold 2 is pulled rightward by the electric cylinder 6 to open the mold. At the same time, the forming barrier sleeve is pushed rightward to demold the injection-molded tire. Embodiment 2

[0030] Based on Embodiment 1, in Embodiment 2, as Figures 1 to 3 shown, the front surface of the fixed mold 1 is provided with a first water inlet 108 and a first water outlet 109. After the injection is completed, the cooling water flows in from the first water inlet 108 and flows out from the first water outlet 109. A left water cooling pipe 110 is provided at a position in the fixed mold 1 far from the left mold cavity 101. The front surface of the moving mold 2 is provided with a second water inlet 205 and a second water outlet 206. A right water cooling pipe 207 is provided at a position in the moving mold 2 far from the right mold cavity 203. After the injection is completed, the cooling water flows in from the second water inlet 205 and flows out from the second water outlet 206, quickly taking away the heat of the injection-molded part to complete cooling, improving the quality of the injection-molded tire and the production efficiency.

[0031] During the operation of Embodiment 2, when the first injection is completed and the wheel hub is formed, the cooling water enters the left water cooling pipe 110 from the first water inlet 108 and is discharged from the first water outlet 109, taking away the heat of the fixed mold 1. The cooling water enters the right water cooling pipe 207 from the second water inlet 205 and is discharged from the second water outlet 206, taking away the heat of the moving mold 2, so that the wheel hub is quickly cooled and formed. Similarly, after the tire skin injection is completed, cooling water is introduced to help the injection-molded tire quickly cool and form. The water cooling quickly taking away the heat of the injection-molded part can effectively reduce the shrinkage rate of the injection-molded part and reduce the molding cycle.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A one-step forming mold for processing a baby carriage tire, comprising a fixed mold (1) and a movable mold (2), characterized in that: A left mold cavity (101) is formed on one side of the fixed mold (1) close to the movable mold (2), a left wheel hub seat (102) is provided at the center of the left mold cavity (101), and a molding barrier sleeve (3) is provided on the outer cover of the left wheel hub seat (102). Limiting convex seats (103) are provided at four corners of one side of the fixed mold (1) close to the movable mold (2), and limiting rods (4) are fixedly connected to the four limiting convex seats (103). The movable mold (2) is slidably mounted on the limiting rods (4). The movable mold (2) is close to the Limiting grooves (201) are provided at four corners of one side of the fixed mold (1), and the four limiting grooves (201) are each provided with a limiting hole (202). A right mold cavity (203) is provided on a side of the movable mold (2) close to the fixed mold (1), and a right wheel hub seat (204) is provided at the center of the right mold cavity (203). A bottom plate (5) is fixedly connected to the right side of the movable mold (2), and the bottom plate (5) is slidably mounted on the four limiting rods (4). An electric cylinder (6) is fixedly mounted on the right side of the bottom plate (5).

2. The one-step forming mold for processing a baby carriage tire according to claim 1, characterized in that: The right end of the molded barrier sleeve (3) is provided with an annular push plate (301), and the left end of the molded barrier sleeve (3) is provided with four sliding plates (302) along the circumference, and the left ends of the four sliding plates (302) pass through the fixed mold (1) and are fixed with a pressing plate (303).

3. The one-step forming mold for processing a baby carriage tire according to claim 1, characterized in that: The left ends of the four limit rods (4) are interference fit with the four limit holes (202), and the right sides of the four limit rods (4) are installed with limit sleeves (401).

4. The one-step forming mold for processing a baby carriage tire according to claim 1, characterized in that: The four corners of the left side of the fixed mold (1) are each provided with a fixing groove (104), the centers of the four fixing grooves (104) are each provided with a threaded hole (105), the top surface of the fixed mold (1) is provided with a first injection port (106) and a second injection port (107), the front surface of the fixed mold (1) is provided with a first water inlet (108) and a first water outlet (109), and a left water cooling pipe (110) is provided in the fixed mold (1) at a position away from the left mold cavity (101).

5. The one-step forming mold for processing a baby carriage tire according to claim 1, characterized in that: The top surface of the movable mold (2) is provided with a vacuum port (209), the front surface of the movable mold (2) is provided with a second water inlet (205) and a second water outlet (206), and a right water cooling pipe (207) is provided at a position away from the right mold cavity (203) in the movable mold (2).

6. The one-step forming mold for processing a baby carriage tire according to claim 1, characterized in that: An exhaust groove (111) is provided on the outside of the left mold cavity (101), and a sealing ring (208) is provided on the outside of the right mold cavity (203).

7. The one-step forming mold for processing a baby carriage tire according to claim 1, characterized in that: A push plate groove (112) is provided on the outer side of the left wheel hub seat (102), and a bearing seat (7) is provided at the center of both the left wheel hub seat (102) and the right wheel hub seat (204).

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