A rapid rubber coating process for dumbbells

Abstract

The present invention provides a rapid rubber coating process for dumbbells, which relates to the technical field of dumbbell processing. The rapid rubber coating process for dumbbells includes the following specific steps: S1. Mold design: Design a set of openable and closable dumbbell fixing seats, and design a set of rubber coating molds on both sides of the dumbbell fixing seats. The rubber coating molds can be opened and closed horizontally; S2. Mold closing and pouring: Place the dumbbell metal handle in the dumbbell fixing seat, with both ends of the bell head located on both sides of the dumbbell fixing seat, and use two sets of telescopic devices to drive the rubber coating molds to perform covering and mold closing on both ends of the bell head; S3. Automatic injection molding: Inject the rubber melt into the mold cavity of the rubber coating mold through the injection head, so that the rubber melt covers the outside of the bell head. By designing a simple rubber coating forming device and a rubber coating process, not only is the mold opening and closing very convenient and fast, but also by designing detachable forming molds, when different types of rubber layers need to be processed, different detachable forming molds can be quickly replaced, making its overall application range wider.

Description

Technical Field

[0001] The present invention relates to the technical field of dumbbell processing, and specifically to a rapid dumbbell rubber coating process. Background Art

[0002] The rubber-coated dumbbell belongs to a type of dumbbell. The inside of the rubber-coated dumbbell is integrally formed of pure iron, and the outside is covered with rubber to form a rubber layer, so it is named rubber-coated dumbbell. The rubber-coated dumbbell is provided with a rubber bonding structure on the surface of the bell head. The bonding structure is a protrusion or a depression to increase the surface area of the bell head bonded to the rubber and increase the bonding strength. The rubber-coated dumbbell is a relatively common fitness equipment. The rubber-coated dumbbell has a delicate appearance, good hand feeling, does not hurt the hand, is protected by the colloid, and does not generate noise during training.

[0003] The rubber coating process is an essential process in the production and processing of rubber-coated dumbbells. The traditional rubber coating process uses two sets of concave molds to cover the bell heads at both ends, and then directly injects plastic. A rubber layer is formed on the bell heads at both ends of the dumbbell. After processing, the molds are demolded one by one. This traditional rubber coating process is not only very inconvenient for demolding, but also generally requires the overall replacement of different injection molds when processing rubber layers of different specifications. The applicable range of the molds is small, and at the same time, it further increases the processing cost.

[0004] Therefore, we have developed a new rapid dumbbell rubber coating process. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a rapid dumbbell rubber coating process, which solves the problems that the traditional rubber coating process is not only very inconvenient for demolding, but also generally requires the overall replacement of different injection molds when processing rubber layers of different specifications. The applicable range of the molds is small, and at the same time, it further increases the processing cost.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present invention is realized through the following technical solutions: A rapid dumbbell rubber coating process includes the following specific steps;

[0009] S1. Mold Design: Design a set of openable and closable dumbbell fixing seats, and design a set of rubber coating molds on both sides of the dumbbell fixing seats. The rubber coating molds can be opened and closed horizontally.

[0010] S2. Mold Closing and Pouring: Place the dumbbell metal handle in the dumbbell fixing seat, with the bell heads at both ends located on both sides of the dumbbell fixing seat, and use two sets of telescopic devices to drive the rubber coating molds to cover and close the bell heads at both ends.

[0011] S3. Automatic Injection Molding: Inject the rubber melt into the mold cavity of the rubber coating mold through the injection head, so that the rubber melt covers the outside of the bell head.

[0012] S4. Cooling and forming: After injection molding, coolant is injected into the overmolding die through the water injection port, and the rubber melt is rapidly cooled and formed by water cooling to form a rubber layer on the outer side of the bell head;

[0013] S5. Automatic mold opening: After the rubber layer is cooled and formed, start two sets of telescopic devices to drive the two sets of overmolding dies to open automatically;

[0014] S6. Manual blanking: Open the dumbbell fixing seat and take out the dumbbell after overmolding from the dumbbell fixing seat;

[0015] S7. Cutting and shaping: Cut off the excess burrs of the formed overmolded dumbbell and polish its edges.

[0016] Preferably, in S1, the dumbbell fixing seat is divided into an upper seat and a lower seat, a groove corresponding to the dumbbell metal handle is opened in the center of the dumbbell fixing seat, and the outer wall of the dumbbell metal handle is closely attached to the groove.

[0017] Preferably, in S4, a cooling cavity is provided in the overmolding die. After the coolant is injected, it is used for the rapid cooling of the rubber layer, and the heated coolant is discharged from the top drain port out of the cooling cavity.

[0018] A rapid overmolding process for dumbbells further includes an overmolding device, the overmolding device includes a lower fixing seat, an upper fixing seat and an overmolding injection mechanism, a handle positioning cavity is opened between the lower fixing seat and the upper fixing seat, and a plurality of limiting holes corresponding to the handle positioning cavity are opened at both ends between the lower fixing seat and the upper fixing seat;

[0019] Preferably, a set of overmolding injection mechanisms are arranged on both sides between the lower fixing seat and the upper fixing seat, and a plurality of positioning grooves corresponding to the overmolding injection mechanisms are opened on the outer side between the lower fixing seat and the upper fixing seat.

[0020] Preferably, a plurality of positioning holes are opened on both sides of the bottom of the lower fixing seat, and the central axes of the plurality of positioning grooves and the limiting holes are located on the same straight line.

[0021] Preferably, the overmolding injection mechanism includes a plurality of mounting seats, connection blocks are fixedly connected between the plurality of mounting seats, telescopic devices are fixedly connected to the front end and the rear end of two of the mounting seats, a water injection pipe is fixedly connected to the center of the bottom of the mounting seat, a drain pipe is fixedly connected to the center of the top of the mounting seat, a detachable forming die is installed in the center of the mounting seat, a forming cavity is opened inside the detachable forming die, an injection port is arranged in the center of the outer side of the detachable forming die, and a plurality of mounting holes are opened on the periphery of the detachable forming die.

[0022] Preferably, the mounting base is a hollow shell structure, and the water injection pipe and the drain pipe are both in communication with the mounting base.

[0023] (III) Advantageous Effects

[0024] The present invention provides a rapid dumbbell rubber coating process, which has the following advantageous effects:

[0025] 1. In this rapid dumbbell rubber coating process, by designing a simple rubber coating forming device and a rubber coating process, not only is the mold opening and closing very convenient and fast, but also by designing a detachable forming mold, when different types of rubber layers need to be processed, different detachable forming molds can be quickly replaced, making its overall application range wider and greatly reducing the production and processing costs at the same time.

[0026] 2. In this rapid dumbbell rubber coating process, by designing a simple process flow, the rubber coating processing of a large number of dumbbells with rubber layers can be quickly completed. It is not only convenient for mold opening and closing processing, but also greatly improves the work efficiency, further ensuring the processing progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional structure diagram of the present invention;

[0028] Figure 2 is a structural diagram of the lower fixing base of the present invention;

[0029] Figure 3 is a sectional structure diagram of the present invention;

[0030] Figure 4 is an installation structure diagram of the detachable forming mold of the present invention;

[0031] Figure 5 is Figure 2 a partial enlarged view of A in

[0032] Figure 6 is Figure 3 a partial enlarged view of B in

[0033] Among them, 1. Lower fixing base; 2. Upper fixing base; 3. Handle positioning cavity; 4. Limit hole; 5. Rubber coating injection mechanism; 501. Mounting base; 502. Connecting block; 503. Telescopic device; 504. Water injection pipe; 505. Drain pipe; 506. Detachable forming mold; 507. Forming cavity; 508. Injection port; 509. Mounting hole; 6. Positioning groove. DETAILED DESCRIPTION OF THE INVENTION

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment:

[0036] As Figures 1-3 shown, the embodiment of the present invention provides a rapid rubber coating process for dumbbells, including a rubber coating forming device for rubber coating processing. The rubber coating forming device includes a lower fixing seat 1, an upper fixing seat 2, and a rubber coating injection mechanism 5. As Figure 5 shown, a handle positioning cavity 3 is provided between the lower fixing seat 1 and the upper fixing seat 2, and a plurality of limiting holes 4 corresponding to the handle positioning cavity 3 are provided at both ends between the lower fixing seat 1 and the upper fixing seat 2;

[0037] As Figure 4 and Figure 6 shown, a set of rubber coating injection mechanisms 5 are provided on both sides between the lower fixing seat 1 and the upper fixing seat 2. The rubber coating injection mechanism 5 includes a plurality of mounting seats 501. Connecting blocks 502 are fixedly connected between the plurality of mounting seats 501. Telescopic devices 503 are fixedly connected to the front and rear ends of two of the mounting seats 501. A water injection pipe 504 is fixedly connected to the center of the bottom of the mounting seat 501, and a drain pipe 505 is fixedly connected to the center of the top of the mounting seat 501. A detachable forming mold 506 is installed in the center of the mounting seat 501. A forming mold cavity 507 is provided inside the detachable forming mold 506. An injection port 508 is provided at the center of the outside of the detachable forming mold 506. A plurality of mounting holes 509 are provided on the peripheral side of the detachable forming mold 506. The two sets of telescopic devices 503 can drive the rubber coating injection mechanism 5 to close and open the mold. The telescopic device 503 can be a hydraulic cylinder, a pneumatic cylinder or other telescopic mechanisms. When the two sets of rubber coating injection mechanisms 5 are combined with the lower fixing seat 1 and the upper fixing seat 2, the two sets of detachable forming molds 506 will cover the bell heads at both ends of the plurality of dumbbells, and then rubber melt can be injected into the forming mold cavity 507 through the injection port 508. After the rubber melt cools and forms in the forming mold cavity 507, a rubber layer can be formed; the mounting seat 501 is a hollow shell structure, and the water injection pipe 504 and the drain pipe 505 are both communicated with the mounting seat 501, so that coolant can be injected into the mounting seat 501 through the water injection pipe 504 to accelerate the cooling of the rubber layer. During the continuous water injection process, the heated coolant will be discharged through the drain pipe 505; the detachable forming mold 506 is fixed to the mounting seat 501 by a plurality of fixing screws, so that the detachable forming mold 506 can be quickly installed and disassembled. When different types of rubber layers need to be processed, different detachable forming molds 506 can be quickly replaced, making its overall application range wider;

[0038] A plurality of positioning grooves 6 corresponding to the overmolding mechanism 5 are provided on the outer side between the lower fixed seat 1 and the upper fixed seat 2; a plurality of positioning holes are provided on both sides of the bottom of the lower fixed seat 1, and the central axes of the plurality of positioning grooves 6 and the limiting holes 4 are located on the same straight line, so that the inner sides of the plurality of detachable molding dies 506 on the two sets of overmolding mechanisms 5 can be inserted into the corresponding positioning grooves 6 to achieve rapid and accurate positioning, ensuring the processing accuracy.

[0039] Based on the above overmolding device, the dumbbell rapid overmolding process includes the following specific steps;

[0040] S1. Mold design: Design a set of openable and closable lower fixed seat 1 and upper fixed seat 2, and design a set of overmolding mechanisms 5 on both sides of the lower fixed seat 1 and the upper fixed seat 2. The overmolding mechanism 5 can open and close the mold horizontally;

[0041] S2. Mold closing and pouring: Place a plurality of dumbbell metal handles in the corresponding handle positioning cavities 3, with both ends of the bell heads located on both sides of the lower fixed seat 1 and the upper fixed seat 2, and use the two sets of telescopic devices 503 to drive the overmolding mechanism 5 to perform overmolding and mold closing on both ends of the bell heads;

[0042] S3. Automatic injection molding: Inject the rubber melt into the molding cavity 507 through the injection port 508, so that the rubber melt covers the outer side of the bell head;

[0043] S4. Cooling and forming: After the injection molding is completed, inject the coolant into the mounting seat 501 through the water injection pipe 504, and use the water cooling method to quickly cool and form the rubber melt to form a rubber layer on the outer side of the bell head;

[0044] S5. Automatic mold opening: After the rubber layer is cooled and formed, start the two sets of telescopic devices 503 to drive the two sets of overmolding mechanisms 5 to automatically open the mold;

[0045] S6. Manual blanking: Open the upper fixed seat 2 and take out the overmolded dumbbell from the lower fixed seat 1;

[0046] S7. Cutting and shaping: Cut off the excess burrs of the molded overmolded dumbbell and polish its edges.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid encapsulation process for dumbbells, characterized in that, It includes the following specific steps; S1. Mold design: Design a set of openable and closable dumbbell fixing seats, and design a set of overmolding molds on both sides of the dumbbell fixing seats. The overmolding molds can be opened and closed horizontally; S2. Mold closing and pouring: Place the dumbbell metal handle in the dumbbell fixing seat, with the two ends of the bell head located on both sides of the dumbbell fixing seat. Use two sets of telescopic devices to drive the overmolding molds to cover and close the two ends of the bell head; S3. Automatic injection molding: Inject the rubber melt into the mold cavity of the overmolding mold through the injection head, so that the rubber melt covers the outside of the bell head; S4. Cooling and forming: After the injection molding is completed, inject the coolant into the overmolding mold through the water injection port, and use the water cooling method to quickly cool the rubber melt to form, and form a rubber layer on the outside of the bell head; S5. Automatic mold opening: After the rubber layer is cooled and formed, start the two sets of telescopic devices to drive the two sets of overmolding molds to automatically open the mold; S6. Manual blanking: Open the dumbbell fixing seat and take out the dumbbell after overmolding from the dumbbell fixing seat; S7. Cutting and shaping: Cut off the excess burrs of the molded overmolded dumbbell and polish its edges; In S1, the dumbbell fixing seat is divided into an upper seat and a lower seat. A groove corresponding to the dumbbell metal handle is opened in the center of the dumbbell fixing seat, and the outer wall of the dumbbell metal handle is closely attached to the groove; In S4, a cooling cavity is provided in the overmolding mold. After the coolant is injected, it is used for the rapid cooling of the rubber layer, and the heated coolant is discharged from the top drain port of the cooling cavity; It further includes an overmolding device, which includes a lower fixing seat (1), an upper fixing seat (2) and an overmolding injection mechanism (5). The overmolding injection mechanism (5) includes a plurality of mounting seats (501), and connecting blocks (502) are fixedly connected between the plurality of mounting seats (501). Telescopic devices (503) are fixedly connected to the front and rear ends of two of the mounting seats (501). A water injection pipe (504) is fixedly connected to the center of the bottom of the mounting seat (501), and a drain pipe (505) is fixedly connected to the center of the top of the mounting seat (501). A detachable forming mold (506) is installed in the center of the mounting seat (501). A forming mold cavity (507) is opened inside the detachable forming mold (506). An injection port (508) is provided in the center of the outside of the detachable forming mold (506), and a plurality of mounting holes (509) are opened on the periphery of the detachable forming mold (506).

2. The rapid rubber coating process for dumbbells according to claim 1, characterized in that: A handle positioning cavity (3) is opened between the lower fixing seat (1) and the upper fixing seat (2), and a plurality of limiting holes (4) corresponding to the handle positioning cavity (3) are opened at both ends between the lower fixing seat (1) and the upper fixing seat (2); A set of overmolding injection mechanisms (5) are provided on both sides between the lower fixing seat (1) and the upper fixing seat (2), and a plurality of positioning grooves (6) corresponding to the overmolding injection mechanisms (5) are opened on the outside between the lower fixing seat (1) and the upper fixing seat (2); 3. A rapid encapsulation process for dumbbells according to claim 2, characterized in that: A plurality of positioning holes are opened on both sides of the bottom of the lower fixing seat (1), and the central axes of the plurality of positioning grooves (6) and the limiting holes (4) are located on the same straight line.

4. A rapid encapsulation process for dumbbells according to claim 1, characterized in that: The mounting base (501) is of a hollow shell structure, and the water injection pipe (504) and the drain pipe (505) both communicate with the mounting base (501).

5. A rapid rubber coating process for dumbbells according to claim 1, characterized in that: The detachable forming die (506) is fixed to the mounting base (501) by a plurality of fixing screws.

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