A bottle cap stamping device

Abstract

This invention discloses a bottle cap stamping device, belonging to the field of bottle cap stamping technology. It includes an upper template, a lower template parallel to the lower side of the upper template, and a hydraulic telescopic device disposed between the upper and lower templates. A punch is mounted on the upper template, and a die corresponding to the punch is mounted on the lower template. A blowhole is provided on the lower outer side of the punch, and the blowhole is connected to a positive pressure blowing device through a channel provided on the inner side of the punch. A support ring is fitted on the outer side of the punch, and the gap between the support ring and the punch is greater than the thickness of the bottle cap. The upper end of the support ring is connected to the upper template through an elastic support device. At least three sets of lifting components are evenly spaced on the outer side of the support ring. Each lifting component includes a rotating shaft, a return spring, a pull plate, and a hook plate. The rotating shaft is rotatably installed in a notch on the outer side of the support ring, and the upper end of the pull plate is fixedly connected to the rotating shaft. This invention can effectively remove the bottle cap from the mold, thereby improving stamping efficiency.

Description

Technical Field

[0001] This invention belongs to the field of bottle cap stamping technology, and specifically relates to a bottle cap stamping device. Background Technology

[0002] Bottle cap stamping technology is widely used in the production of bottle caps in the packaging fields of beverages, pharmaceuticals, and daily chemicals. Its basic principle is to use the cooperation of a punch and die in a stamping machine to punch and stretch sheet metal or plastic into the desired bottle cap shape. In continuous stamping, the feeding mechanism feeds the strip or sheet blank between the punch and die in a step-by-step manner, forming the bottle cap through multiple processes such as punching, drawing, and edge curling. In actual high-speed stamping production, especially when stamping metal bottle caps or deeply drawn plastic bottle caps, the tight fit between the outer wall of the bottle cap and the inner wall of the die, as well as the significant clamping force between the inner wall of the bottle cap and the outer wall of the punch, coupled with potential local vacuum adsorption effects or insufficient material springback during stamping, often results in the bottle cap failing to detach smoothly from the die after stamping. This often leads to the bottle cap stubbornly remaining in the die cavity or covering the punch, severely affecting production continuity and stamping efficiency. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a bottle cap stamping device that can effectively remove the bottle cap from the mold, thereby improving stamping efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a bottle cap stamping device, comprising an upper template, a lower template parallel to the lower side of the upper template, and a hydraulic telescopic device disposed between the upper and lower templates. A punch is mounted on the upper template, and a die corresponding to the punch is mounted on the lower template. A blow hole is provided on the lower outer side of the punch, and the blow hole is connected to a positive pressure blowing device through a channel provided on the inner side of the punch. A support ring is sleeved on the outer side of the punch, and the gap between the support ring and the punch is greater than the thickness of the bottle cap. The upper end of the support ring is connected to the upper template through an elastic support device. At least three sets of lifting components are evenly spaced on the outer side of the support ring. The lifting components include a rotating shaft, a return coil spring, a pull plate, and a hook plate. The rotating shaft is rotatably installed in a notch opened on the outer side of the support ring. The upper end of the pull plate is fixedly connected to the rotating shaft, and the lower end of the pull plate is inclined outward and connected to the hook plate. A return coil spring is connected between the rotating shaft and the support ring. The return coil spring is used to provide a radially inward elastic force to the pull plate. The punch protrudes from the upper surface of the lower template, and its protrusion height is greater than the length of the pull plate.

[0005] Furthermore, a first spur gear is coaxially mounted on the rotating shaft. The first spur gear meshes with a second spur gear. The second spur gear is connected to a brake telescopic device, which is installed inside the notch. A positioning plate is also provided at the notch, which is used to position and support the pull plate.

[0006] Furthermore, the hook plate is fixedly connected to the pull plate, and a roller is rotatably connected at the connection between the hook plate and the pull plate, with the axis of the roller parallel to the width direction of the pull plate.

[0007] Furthermore, the upper template has a through hole, and the elastic support device includes a guide post and a support spring. The lower end of the guide post is vertically fixed to the support ring, and the upper end of the guide post slides through the through hole. The support spring is sleeved on the outside of the guide post, and the two ends of the support spring are connected to the upper template and the support ring, respectively.

[0008] Furthermore, a fixing ring is fixed on the upper side of the upper template. Multiple sets of first rotating shafts are evenly spaced along the circumference of the fixing ring. The first rotating shaft is rotatably connected to one end of the connecting plate. The other end of the connecting plate is hinged to one end of the connecting rod through a second rotating shaft. The other end of the connecting rod is rotatably connected to a third rotating shaft. The third rotating shaft is fixedly connected to the rotating ring. The connecting rod is parallel to the connecting plate. The rotating ring is connected to a rotating drive device. A limit rod is fixed on the lower side of the connecting rod. The limit rod extends in the vertical direction. The outer side of the limit rod is used to limit the outer side of the circular bottle cap blank.

[0009] Furthermore, a mounting base is fixed on the upper template, and an opening groove is provided on the mounting base. The rotating ring is slidably disposed in the opening groove, and a gear ring is installed on the outer side of the rotating ring. The rotation drive device includes a third spur gear and a motor. The gear ring meshes with the third spur gear, and the third spur gear is connected to the motor.

[0010] Furthermore, the limiting rod includes a central rod, a rubber support rod, and an outer rod. The upper end of the central rod is fixedly connected to the connecting plate, and the lower end of the central rod is slidably disposed in an arc-shaped groove opened on the lower template. The rubber support rod is coaxially installed on the outside of the central rod, and the outer rod is coaxially installed on the outside of the rubber support rod.

[0011] The beneficial effects of this invention are as follows: This invention discloses a bottle cap stamping device. By designing blow holes on the punch for blowing to facilitate punch demolding, and by using a hook plate for die demolding, the combination of the two can effectively remove the bottle cap from the mold, thereby improving stamping efficiency. The device has a simple and compact structure and can improve the stability of the equipment during demolding. Attached Figure Description

[0012] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a schematic diagram of the limit rod structure; Figure 4 This is a structural schematic diagram of the positioning plate; Figure 5 This is a schematic diagram of the rotating shaft.

[0013] The following are the markings in the attached diagram: Upper template 1, Lower template 2, Hydraulic telescopic device 3, Punch 4, Blow hole 5, Positive pressure blowing device 6, Support ring 7, Rotating shaft 8, Return coil spring 9, Pull plate 10, Hook plate 11, Notch 12, First spur gear 13, Second spur gear 14, Braking telescopic device 15, Positioning plate 16, Roller 17, Guide column 18, Support spring 19, Fixing ring 20, First rotating shaft 21, Connecting plate 22, Second rotating shaft 23, Connecting rod 24, Third rotating shaft 25, Rotating ring 26, Limiting rod 27, Mounting seat 28, Opening slot 29, Gear ring 30, Third spur gear 31, Motor 32, Center rod 33, Rubber support rod 34, Outer rod 35, Arc groove 36. Detailed Implementation

[0014] like Figures 1-5 As shown, this invention discloses a bottle cap stamping device, including an upper template 1, a lower template 2 parallel to the lower side of the upper template 1, and a hydraulic telescopic device 3 disposed between the upper template 1 and the lower template 2. A punch 4 is mounted on the upper template 1, and a die corresponding to the punch 4 is mounted on the lower template 2. A blow-out hole 5 is provided on the lower outer side of the punch 4, and the position of the blow-out hole 5 corresponds to the position of the bottle cap. When the bottle cap is attached to the outer wall of the punch 4, the blow-out hole 5 is located on the inner side of the bottle cap. The blow-out hole 5 is connected to a positive pressure blowing device 6 through a channel provided on the inner side of the punch 4. If the stamped bottle cap is attached to the outer wall of the punch 4, the positive pressure blowing device 6 provides positive pressure, and under the action of strong positive pressure blowing force, the bottle cap can be blown off, thereby avoiding the problem of repeated stamping. At the same time, this invention provides a support ring 7 on the outer side of the punch 4. The gap between the support ring 7 and the punch 4 is greater than the thickness of the bottle cap, which can avoid affecting the end face of the bottle cap. The upper end of the support ring 7 is connected to the upper template 1 via an elastic support device. At least three sets of lifting components are evenly spaced on the outer side of the support ring 7. Each lifting component includes a rotating shaft 8, a return spring 9, a pull plate 10, and a hook plate 11. The rotating shaft 8 is rotatably mounted within a notch 12 on the outer side of the support ring 7. The upper end of the pull plate 10 is fixedly connected to the rotating shaft 8, and the lower end of the pull plate 10 is inclined outwards and connected to the hook plate 11. A return spring 9 is connected between the rotating shaft 8 and the support ring 7, providing a radially inward elastic force to the pull plate 10. The punch 4 protrudes from the upper surface of the lower template 2, and its protrusion height is greater than the length of the pull plate 10. If the bottle cap is attached to the inner wall of the die, the hook plate 11 of the lifting component can hook the flange of the bottle cap and lift it upwards along with the support ring 7, avoiding the problem of repeated stamping caused by the bottle cap remaining in the die.

[0015] The working principle and process of the device of the present invention are as follows: If the bottle cap adheres tightly to the outer wall of the punch 4 due to material deformation or friction during the stamping process, traditional demolding methods often fail to effectively separate it, which can easily cause the bottle cap to return along with the punch 4, leading to repeated stamping accidents during the next stamping, which can not only damage the bottle cap but also cause impact damage to the mold itself.

[0016] This invention precisely creates blowholes 5 on the lower outer side of the punch 4, corresponding to the bottle cap position, and utilizes the internal channel of the punch 4 to guide the high-pressure airflow of the positive pressure blowing device 6 to the inner side of the bottle cap in a fitted state. This generates an outwardly expanding positive pressure air curtain in a very short time. The radial thrust exerted by this air curtain is much greater than the static friction between the inner wall of the bottle cap and the outer wall of the punch 4, thereby blowing the bottle cap off the punch 4 in a non-contact manner. This ensures the integrity of the bottle cap and eliminates the risk of repeated stamping caused by the bottle cap remaining on the punch 4.

[0017] Meanwhile, the present invention provides a support ring 7 sleeved on the outside of the punch 4. The upper end of the support ring 7 is connected to the upper template 1 through an elastic support device, so that the support ring 7 can adaptively compress and spring back according to the closing action of the punch 4 and the die during stamping. This ensures reliable pressing of the outer flange of the bottle cap during stamping, without applying excessive additional pressure to the bottle cap due to rigid connection. If the bottle cap is attached to the inner wall of the die, the hook plate 11 of the lifting assembly can hook the flange of the bottle cap and lift it upward along with the support ring 7, avoiding the problem of repeated stamping caused by the bottle cap remaining in the die. Specifically, during use, when stamping downward, since the outer end of the pull plate 10 faces outward, the pull plate 10 can overcome the force of the return spring 9 and flip outward under the support of the blank. When the support ring 7 rises with the upper template 1, the return spring 9 provides a radially inward elastic force to the pull plate 10, so that the hook plate 11 at the lower end of the pull plate 10 can actively swing inward, just hooking the flange structure of the bottle cap. As the support ring 7 continues to rise, the hook plate 11 applies a vertical upward lifting force to the cap flange, thereby forcibly pulling out the cap stuck in the die. The evenly spaced arrangement of three or more lifting components ensures that the lifting force is evenly distributed in the circumferential direction of the cap, avoiding cap skewing or flange tearing due to single-point force, and greatly improving the safety and automation of continuous operation of the stamping equipment.

[0018] In this embodiment, a first spur gear 13 is coaxially mounted on the rotating shaft 8. The first spur gear 13 meshes with a second spur gear 14. The second spur gear 14 is connected to a brake telescopic device 15, which is installed inside a notch 12. A positioning plate 16 is also provided at the notch 12, which is used to position and support the pull plate 10. By setting a first spur gear 13 coaxial with the rotating shaft 8, a second spur gear 14 meshing with it, and a brake telescopic device 15, the present invention allows the operator or control system to actively drive the brake telescopic device 15 to extend at a specific stage of the stamping stroke, so that the second spur gear 14 locks or restricts the rotation of the first spur gear 13, thereby keeping the pull plate 10 in an inwardly retracted state. This can restrict the rotation of the rotating shaft 8, and the direction of the bottle cap falling can be selected according to different choices. For example, when there are 4 sets of lifting components, one set of lifting components is selected to be fastened. Therefore, only the hook plate 11 of that set of lifting components can act on the flipping edge of the bottle cap. When the positive pressure blowing device 6 is used, the wind force acts on the bottle cap. Since the bottle cap is only limited in this direction, the bottle cap will fall in this direction.

[0019] In this embodiment, the hook plate 11 is fixedly connected to the pull plate 10, and a roller 17 is rotatably connected at the connection between the hook plate 11 and the pull plate 10. The axis of the roller 17 is parallel to the width direction of the pull plate 10. The rolling friction method is adopted to reduce the risk of plastic deformation or breakage of the bottle cap due to excessive friction.

[0020] In this embodiment, the upper template 1 has a through hole. The elastic support device includes a guide post 18 and a support spring 19. The lower end of the guide post 18 is vertically fixed to the support ring 7, and the upper end of the guide post 18 slides through the through hole. The support spring 19 is sleeved on the outside of the guide post 18, and both ends of the support spring 19 are connected to the upper template 1 and the support ring 7, respectively. By setting the guide post 18 to be vertically fixed to the support ring 7 and allowing the upper end of the guide post 18 to slide through the through hole on the upper template 1, a rigid and low-friction linear guide path is provided for the support ring 7, ensuring that the support ring 7 maintains an absolute parallel relationship with the upper template 1 and the punch 4 during each compression and rebound process.

[0021] In this embodiment, a fixing ring 20 is fixed on the upper side of the upper template 1. Multiple sets of first rotating shafts 21 are evenly spaced along the circumference of the fixing ring 20. The first rotating shafts 21 are rotatably connected to one end of the connecting plate 22. The other end of the connecting plate 22 is hinged to one end of the connecting rod 24 through a second rotating shaft 23. The other end of the connecting rod 24 is rotatably connected to a third rotating shaft 25. The third rotating shaft 25 is fixedly connected to a rotating ring 26. The connecting rod 24 is parallel to the connecting plate 22. The rotating ring 26 is connected to a rotating drive device. A limiting rod 27 is fixed on the lower side of the connecting rod 24. The limiting rod 27 extends in the vertical direction. The outer side of the limiting rod 27 is used to limit the outer side of the circular bottle cap blank. By rotating the rotating ring 26, the rotating ring 26 can drive the connecting plate 22 to rotate around the first rotating shaft 21 via the third rotating shaft 25. At the same time, the connecting plate 22 drives the limiting rod 27 to move, thereby limiting the outer edge of the circular blank in the circumferential direction. Since the rotating ring 26, the fixed ring 20 and the punch 4 are concentric, the multiple sets of limiting rods 27 cooperate to achieve rapid centering of the blank, which can ensure the quality of the bottle cap in the stamping process and facilitate the subsequent removal of the bottle cap from the die or punch 4.

[0022] In this embodiment, a mounting base 28 is fixed on the upper template 1. The mounting base 28 is provided with an opening groove 29. The rotating ring 26 is slidably disposed in the opening groove 29, which can play the role of rotational support, ensure the stability of the rotation of the rotating ring 26, and avoid axial movement. A gear ring 30 is installed on the outer side of the rotating ring 26. The rotation drive device includes a third spur gear 31 and a motor 32. The gear ring 30 meshes with the third spur gear 31, and the third spur gear 31 is connected to the motor 32.

[0023] In this embodiment, the limiting rod 27 includes a central rod 33, a rubber support rod 34, and an outer rod 35. The upper end of the central rod 33 is fixedly connected to the connecting plate 22, and the lower end of the central rod 33 is slidably disposed in an arc-shaped groove 36 opened on the lower template 2. The rubber support rod 34 is coaxially mounted on the outside of the central rod 33, and the outer rod 35 is coaxially mounted on the outside of the rubber support rod 34. The outer rod 35 is coaxially mounted on the outside of the central rod 33 through the rubber support rod 34. When the limiting rod 27 contacts the edge of the blank, the rubber support rod 34 can generate a small and controllable elastic deformation, transforming the original rigid impact into a flexible contact. This flexible limiting not only protects the surface of the blank, but more importantly, the elasticity of the rubber can automatically compensate for the small manufacturing tolerances of the blank diameter or the small eccentricity during positioning, so that the blank can still slightly self-adjust to the optimal stamping position under the guidance of the limiting rod 27, avoiding forced deformation caused by over-positioning.

Claims

1. A bottle cap stamping device, characterized in that: The device includes an upper template, a lower template parallel to the lower side of the upper template, and a hydraulic telescopic device between the upper and lower templates. A punch is mounted on the upper template, and a die corresponding to the punch is mounted on the lower template. A blow hole is opened on the lower outer side of the punch, and the blow hole is connected to a positive pressure blowing device through a channel provided on the inner side of the punch. A support ring is fitted on the outer side of the punch, and the gap between the support ring and the punch is greater than the thickness of the bottle cap. The upper end of the support ring is connected to the upper template through an elastic support device. At least three sets of lifting components are evenly spaced on the outer side of the support ring. The lifting components include a rotating shaft, a return spring, a pull plate, and a hook plate. The rotating shaft is rotatably installed in a notch opened on the outer side of the support ring. The upper end of the pull plate is fixedly connected to the rotating shaft, and the lower end of the pull plate is inclined outward and connected to the hook plate. A return spring is connected between the rotating shaft and the support ring. The return spring is used to provide radially inward elastic force to the pull plate. The punch protrudes from the upper surface of the lower template, and its protrusion height is greater than the length of the pull plate.

2. The bottle cap stamping equipment according to claim 1, characterized in that: A first spur gear is coaxially mounted on the rotating shaft. The first spur gear meshes with a second spur gear. The second spur gear is connected to a brake telescopic device. The brake telescopic device is installed inside the notch. A positioning plate is also provided at the notch. The positioning plate is used to position and support the pull plate.

3. The bottle cap stamping equipment according to claim 2, characterized in that: The hook plate is fixedly connected to the pull plate, and a roller is rotatably connected at the connection between the hook plate and the pull plate. The axis of the roller is parallel to the width direction of the pull plate.

4. The bottle cap stamping equipment according to claim 3, characterized in that: The upper template has a through hole. The elastic support device includes a guide post and a support spring. The lower end of the guide post is vertically fixed to the support ring, and the upper end of the guide post slides through the through hole. The support spring is sleeved on the outside of the guide post, and the two ends of the support spring are connected to the upper template and the support ring, respectively.

5. A bottle cap stamping device according to any one of claims 1-4, characterized in that: A fixing ring is fixed on the upper side of the upper template. Multiple sets of first rotating shafts are evenly spaced along the circumference of the fixing ring. The first rotating shaft is rotatably connected to one end of the connecting plate. The other end of the connecting plate is hinged to one end of the connecting rod through a second rotating shaft. The other end of the connecting rod is rotatably connected to a third rotating shaft. The third rotating shaft is fixedly connected to the rotating ring. The connecting rod is parallel to the connecting plate. The rotating ring is connected to a rotating drive device. A limit rod is fixed on the lower side of the connecting rod. The limit rod extends in the vertical direction. The outer side of the limit rod is used to limit the outer side of the circular bottle cap blank.

6. The bottle cap stamping equipment according to claim 5, characterized in that: A mounting base is fixed on the upper template. The mounting base has an opening groove. The rotating ring is slidably disposed in the opening groove. A gear ring is mounted on the outer side of the rotating ring. The rotation drive device includes a third spur gear and a motor. The gear ring meshes with the third spur gear, and the third spur gear is connected to the motor.

7. The bottle cap stamping equipment according to claim 6, characterized in that: The limiting rod includes a central rod, a rubber support rod, and an outer rod. The upper end of the central rod is fixedly connected to the connecting plate, and the lower end of the central rod is slidably set in an arc-shaped groove opened on the lower template. The rubber support rod is coaxially installed on the outside of the central rod, and the outer rod is coaxially installed on the outside of the rubber support rod.

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