A continuous manufacturing device for bulging ribs and curling the can mouth of a metal square can

Abstract

A device for continuously making the ribbing and curling of the can mouth of a metal square can. The present invention is to solve the problems existing in the prior art, such as not being able to be installed on an automatic continuous production equipment and the imperfect structure of the forming device. Technical solution: It includes a machine base and a ribbing mechanism, a can mouth curling die and a driving mechanism thereon. The machine base is installed on the upper frame of the automatic conveying line for making the body of the metal square can. The driving mechanism is installed on the upper part, and the ribbing mechanism and the can mouth curling die are installed on the lower part. There are four outer side plates and a bottom plate at the lower part of the machine base. The ribbing mechanism includes a ribbing inner die, a ribbing outer die, a stretchable bulging ring, a ribbing inner die return shrinkage ring and a ribbing outer die driver. The driving head of the driving mechanism is in driving cooperation with the ribbing inner die. There is an opening compensation module between every two adjacent ribbing inner dies. The can mouth curling die is arranged above the ribbing inner die and its up and down movement is controlled by the driving mechanism. A curling forming groove is provided on the bottom surface of the can mouth curling die, and the curling forming groove cooperates with the top outer corner part of the ribbing inner die for curling operation.

Description

Technical Field

[0001] The present invention relates to a working device on metal packaging can manufacturing equipment, in particular to a continuous manufacturing device for rib bulging of a metal square can and curling of the can mouth. Background Art

[0002] A metal square can is a metal packaging can with a can mouth at the top and a square cross-section. When manufacturing a metal square can, it is generally necessary to curl the edge of the can mouth inward into the can and bulge a reinforcing rib outward on the can wall below the can mouth. In the production of manufacturing metal square cans, the two processes of can mouth curling and can wall rib bulging are often completed by the continuous action of a manufacturing device.

[0003] A multi-process composite forming die for the body of a food can, disclosed in Chinese Patent Application No. 201910604896.7, is a manufacturing device that completes the two processes of curling the can mouth and bulging the can wall through the continuous action of a working device. Its structure includes a lower die assembly, and the lower die assembly includes a lower template, a forming outer die frame, a rib line bulging core die, a wedge block, a flanging outer die frame, and a flanging bulging core die. The flanging outer die frame is installed on the lower template, the flanging bulging core die is installed on the lower template and is located inside the flanging outer die frame, the wedge block is installed inside the flanging bulging core die, the forming outer die frame is installed on the flanging outer die frame, the rib line bulging core die is installed on the flanging bulging core die and is located inside the forming outer die frame, and a can body cavity adapted to the outer shape of the can body of the food can is formed between the rib line bulging core die and the forming outer die frame. Rib line convex strips and rib line grooves corresponding in position are respectively arranged on the outer side wall of the rib line bulging core die and the inner side wall of the forming outer die frame, and a punching core cavity is arranged at the top of the rib line bulging core die; it further includes an upper die assembly, and the upper die assembly includes an upper template, an upper die, and an upper punching core. Vertical wedges are arranged around the upper template. The upper die is installed at the bottom of the upper template and is located above the rib line bulging core die. The upper punching core is installed at the bottom of the upper die and is directly corresponding to the punching core cavity. When the upper punching core is inserted into the corresponding punching core cavity, the upper punching core can force the rib line bulging core die to spread out in all directions, and each of the wedges can force the forming outer die frame to move inward so that the rib line convex strips extend into the rib line grooves. As the upper punching core continuously descends and presses against the wedge block, the wedge block forces the flanging bulging core die to spread out in all directions, so as to jointly complete the flanging of the bottom opening of the can body with the flanging outer die frame. A curling groove for pressing against the upper mouth of the can body to curl it is also arranged at the bottom of the upper template. The defects of this manufacturing device are: First, it is not suitable for operating above the automatic conveyor line of the can body of a metal square can in a multi-station automatic continuous production equipment for manufacturing metal square cans, and the production efficiency is limited; second, the structure of the forming device is imperfect. One is that after the forming outer die frame 20 is driven by the wedge 71 to move inward, it cannot return to its position, affecting the cooperation of the next metal square can with the forming device. The other is that after two adjacent rib line modules open towards the corner directions, the original contact part between them becomes a non-connected gap, and the metal can wall part corresponding to this gap cannot be well bulged and formed, affecting the quality of the reinforcing ribs of the metal square can and the stiffness of the can body. Summary of the Invention

[0004] In order to overcome the defects of the prior art, such as not being suitable for operating above the automatic conveyor line of the can body of a metal square can in a multi-station automatic continuous production equipment for manufacturing metal square cans and the imperfect structure of the forming device, the purpose of the present invention is to provide an improved continuous manufacturing device for bulging the ribs and curling the can mouth of a metal square can, which can overcome the defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A continuous manufacturing device for bulging ribs and curling the can mouth of a metal square can, comprising a machine base, a rib bulging mechanism, a can mouth curling die and a driving mechanism arranged on the machine base. The characteristics are: The machine base is installed and fixed above the automatic conveying line of the metal square can body on the frame of the automatic production equipment for manufacturing metal square cans. The driving mechanism is installed on the upper part of the machine base. The rib bulging mechanism and the can mouth curling die are respectively installed on the lower part of the machine base. The lower part of the machine base includes four outer side plates arranged in the front, rear, left and right directions and a bottom plate fixed on the outer side plates. The rib bulging mechanism is installed on the upper surface of the bottom plate inside the four outer side plates. The rib bulging mechanism includes four rib bulging inner dies that slide horizontally in the diagonal direction respectively, four rib bulging outer dies that slide horizontally in the front, rear, left and right directions respectively, a stretchable bulging ring sleeved on the bulging working surfaces of the four rib bulging inner dies, a rib bulging inner die return shrinkage ring sleeved on the four rib bulging inner dies, and a rib bulging outer die driver that is in driving cooperation with the four rib bulging outer dies. The driving mechanism is provided with a driving head with an inclined conical side surface that moves vertically up and down. The driving head extends downward to the driven inclined surface of the rib bulging inner die and is in driving cooperation with it through the inclined conical side surface. An opening compensation module is respectively arranged between every two adjacent rib bulging inner dies. The bottom plate is provided with an annular groove for the top opening of the metal square can body to rise and enter. The rib bulging cooperation position of the rib bulging inner die and the rib bulging outer die is above the annular groove. The can mouth curling die is arranged above the rib bulging inner die and is controlled by the driving mechanism to move vertically up and down. A circle of concave curling forming grooves is arranged on the bottom surface of the can mouth curling die. The curling forming grooves cooperate with the outer corner part of the top surface of the rib bulging inner die for curling operation. The opening compensation module is a wedge-shaped body. The front side of the wedge-shaped body has a front side surface that can be flush with the bulging working surface of the rib bulging inner die. The two sides of the front side surface are respectively inclined side surfaces that slide in cooperation with the wall inclined surfaces of two adjacent rib bulging inner dies. The rear part of the wedge-shaped body is a dovetail part that slides in cooperation with the inclined push grooves of two adjacent rib bulging inner dies. When the rib bulging inner die slides in the diagonal direction, the dovetail part is pushed through the inclined push groove to make the opening compensation module move synchronously. When two adjacent rib bulging inner dies slide to the rib bulging operation position, the front side surface of the opening compensation module just moves to the outer opening of the gap between the two rib bulging inner dies and fills the outer opening of the gap.

[0006] The function of the opening compensation module in the above technical solution is to fill the gap that appears between two adjacent rib bulging inner dies when they open outward, so as to prevent four gaps from appearing on the bulging working surfaces among the four rib bulging inner dies when the rib bulging inner dies are in the rib bulging operation position, and to prevent the front stretchable bulging ring from pressing the metal square can wall at these four gaps to cause equal bulging deformation.

[0007] The inclination angles on the inclined side surface of the wedge body, the inclined push grooves of the two adjacent rib expanding inner molds, and the dovetail part of the wedge body in the above technical solution can all be 45°, or other applicable angles can be taken.

[0008] The so-called front, back, left, right, and diagonal directions in the above technical solution are all based on the directions of the four side surfaces when the metal square can to be processed is in the upright position. When the metal square can is not in the upright position, the so-called front, back, left, right, and diagonal directions will change accordingly with rotation, and all such situations belong to the equivalent technical features of the present invention.

[0009] In the above technical solution, guiding sliding grooves extending in the diagonal direction can be respectively provided on the four rib expanding inner molds, and the guiding sliding grooves are respectively in sliding fit with the limiting column bodies on the bottom plate.

[0010] In the above technical solution, the central part of the bottom plate of the annular groove on the bottom plate for the top opening of the metal square can body to rise and enter can be connected to the machine base through the limiting column bodies.

[0011] The rib expanding outer mold driver in the above technical solution can be composed of a roller installed on the rib expanding outer mold, a cylinder installed on the machine base, an inclined push block connected to the end of the piston rod of the cylinder, a pull rod connected to the rib expanding outer mold and sliding through the corresponding outer side plate of the rib expanding outer mold, and a return compression spring sleeved on the pull rod. Among them, the inclined push block cooperates with the roller to push the rib expanding outer mold to move inward, the return compression spring is sleeved on the outer rod section of the pull rod outside the corresponding outer side plate, and one end abuts against the outer side surface of the corresponding outer side plate and the other end abuts against the rod head of the outer rod section. The return compression spring can pull the rib expanding outer mold to move outward and return through the pull rod.

[0012] The driving mechanism in the above technical solution can control the downward movement of the can mouth curling die through a downward pressure rod driven by power, a lower pressure plate fixedly connected to the downward pressure rod, and a vertical connecting rod with one end connected to the lower pressure plate and the other end connected to the can mouth curling die. The middle of the vertical connecting rod is in sliding fit with the machine base. The driving mechanism controls the upward return of the can mouth curling die through a compression spring sleeved on the downward pressure rod, with one end abutting against the machine base and the other end abutting against the lower pressure plate.

[0013] The driving mechanism described in the above technical solution can control the outward horizontal movement of the rib expanding inner mold through a driving rod that moves vertically up and down driven by power and a driving head with an inclined conical side surface connected to the lower end of the driving rod. The driving rod can slide vertically on the lower pressing plate and the machine base. The driving mechanism can control the upward return of the driving rod through a compression spring sleeved on the driving rod, with one end pressing against the machine base and the other end pressing against the fixed seat on the driving rod, so that the rib expanding inner mold moves horizontally inward for return under the action of the rib expanding inner mold return and shrinkage ring.

[0014] The stretchable expansion ring described in the above technical solution can be an elastic rubber ring with a certain hardness and sufficient strength.

[0015] The rib expanding inner mold return and shrinkage ring described in the above technical solution can be a metal tension spring ring or an elastic rubber ring.

[0016] The beneficial effects of the present invention are as follows: First, since the machine base is installed and fixed above the automatic conveying line of the metal square can body on the frame of the automatic production equipment for manufacturing metal square cans, the driving mechanism is installed on the upper part of the machine base, the rib expanding mechanism and the can mouth curling mechanism are respectively installed on the lower part of the machine base, a ring groove for the top opening of the metal square can body to rise and enter is provided on the bottom plate, and the rib expanding cooperation position of the rib expanding inner mold and the rib expanding outer mold is above the ring groove. Therefore, the device of the present invention can be installed on the frame above the automatic conveying line of the metal square can body on the automatic production line for manufacturing metal square cans through the machine base, and the top opening of the continuously conveyed metal square can body rises and enters the ring groove for rib expanding and can mouth curling operations, effectively improving the production efficiency of metal square cans. Second, since the rib expanding mechanism is installed on the bottom plate inside the four outer side plates, the rib expanding mechanism includes four rib expanding inner molds that slide horizontally in the diagonal direction respectively, four rib expanding outer molds that slide horizontally in the front-back, left-right directions respectively, a stretchable expanding ring sleeved on the rib expanding working side surfaces of the four rib expanding inner molds, a rib expanding inner mold return shrinkage ring sleeved on the four rib expanding inner molds, and a rib expanding outer mold driver that drives and cooperates with the four rib expanding outer molds. There is a driving head with an inclined conical side surface that moves vertically up and down on the driving mechanism, and the driving head extends downward to the driven inclined surface of the rib expanding inner mold and drives and cooperates with it. An opening compensation module is respectively provided between every two adjacent rib expanding inner molds. Therefore, the device of the present invention has a perfect structure. Both the rib expanding inner mold and the rib expanding outer mold are provided with forward rib expanding drive and backward return drive. For the gap between every two adjacent rib expanding inner molds after they open, an opening compensation module is provided to automatically fill the gap, making the forming specifications and quality of the entire circle of reinforcing ribs of the metal square can body uniform and consistent, effectively ensuring the stiffness of the tank body after rib expanding. Third, a stretchable expanding ring with a certain hardness and sufficient strength is sleeved on the rib expanding working side surfaces of the four rib expanding inner molds as the forced expanding forming part of the rib expanding inner mold, which can make the expanded reinforcing ribs smooth and traceless and uniformly formed. This is an innovative design of the applicant. If raised lines are respectively processed on the rib expanding working side surfaces of the rib expanding inner mold and the opening compensation module, stitches will be generated at the joint of the rib expanding inner mold and the opening compensation module after rib expanding, affecting the aesthetics of the reinforcing ribs. However, the reinforcing ribs formed by the stretchable expanding ring of the device of the present invention do not have such stitches.

[0017] The following further describes the present invention with reference to the accompanying drawings and embodiments. Description of the Drawings

[0018] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention.

[0019] Figure 2 is Figure 1 a schematic diagram with the upper part of the machine base removed.

[0020] Figure 3 is Figure 1 the upward perspective three-dimensional schematic diagram of

[0021] Figure 4 is Figure 1 the A-A partial sectional schematic diagram of

[0022] Figure 5 is Figure 4 the partial enlarged schematic diagram of

[0023] Figure 6 is Figure 1 the three-dimensional schematic diagram of the cooperation relationship among the four bulging rib inner molds, the four opening compensation modules and the driving head of the bulging rib mechanism in

[0024] Figure 7 is Figure 6 the three-dimensional schematic diagram of the four bulging rib inner molds in the open state of

[0025] In the figure: 1. Machine base; 2. Bulging rib mechanism; 3. Tank mouth curling die; 4. Driving mechanism; 5, 6, 7 and 8. Outer side plates; 9. Bottom plate; 10, 11, 12 and 13. Bulging rib inner molds; 14 and 15. Bulging rib outer molds; 16. Stretchable bulging ring; 17. Bulging rib inner mold return shrinkage ring; 18. Bulging rib outer mold driver; 19. Oblique cone side; 20. Driving head; 21. Opening compensation module; 22. Ring groove; 23. Bulging rib cooperation position; 24. Bottom surface of the tank mouth curling die; 25. Curling forming groove; 26. Top surface outer corner part; 27. Gap; 28. Front side; 29. Wall slope; 30. Oblique side; 31. Oblique push groove; 32. Dovetail part; 33. Guide sliding groove; 34. Limit column body; 35. Center part of the bottom plate; 36. Roller; 37. Cylinder; 38. Oblique push block; 39. Pull rod; 40. Return compression spring; 41. Rod head; 42. Pressing rod; 43. Lower pressing plate; 44. Vertical connecting rod; 45. Compression spring; 46. Driving rod; 47. Fixed seat; 48. Compression spring. Specific implementation method

[0026] Refer to Figures 1 to 7, the device for continuously manufacturing the bulged ribs and the curled can mouth of the metal square can, including the machine base 1 and the bulged rib mechanism 2, the can mouth curling die 3 and the driving mechanism 4 arranged on the machine base 1, is characterized in that: the machine base 1 is installed and fixed above the automatic conveyor line of the metal square can body on the automatic production equipment for manufacturing the metal square can, the driving mechanism 4 is installed on the upper part of the machine base 1, the bulged rib mechanism 2 and the can mouth curling die 3 are respectively installed on the lower part of the machine base 1, the lower part of the machine base 1 includes four outer side plates 5, 6, 7, 8 arranged in the front-back, left-right directions and the bottom plate 9 fixed on the outer side plates 5, 6, 7, 8, the bulged rib mechanism 2 is installed on the upper surface of the bottom plate 9 inside the four outer side plates 5, 6, 7, 8, the bulged rib mechanism 2 includes four bulged rib inner dies 10, 11, 12 and 13 sliding horizontally in the diagonal directions respectively, four bulged rib outer dies 14, 15 etc. sliding horizontally in the front-back, left-right directions respectively, the stretchable bulging rings 16 sleeved on the bulging working side surfaces of the four bulged rib inner dies 10, 11, 12 and 13, the bulged rib inner die return shrinkage rings 17 sleeved on the four bulged rib inner dies 10, 11, 12 and 13 and the bulged rib outer die drivers 18 etc. drivingly cooperating with the four bulged rib outer dies 14, 15 etc. respectively, the driving mechanism 4 is provided with a driving head 20 with an inclined conical side surface 19 etc. moving vertically up and down, the driving head 20 extends downward to the driven inclined surfaces of the bulged rib inner dies 10, 11, 12 and 13 and is drivingly cooperated with them by the inclined conical side surface 19 etc., an opening compensation module 21 etc. is respectively arranged between every two adjacent bulged rib inner dies 12 and 13 etc., the bottom plate 9 is provided with an annular groove 22 for the top opening of the metal square can body to rise and enter, the bulging cooperation position 23 of the bulged rib inner die 10 and the bulged rib outer die 14 is above the annular groove, the can mouth curling die 3 is arranged above the bulged rib inner dies 10, 11, 12 and 13 and is controlled by the driving mechanism 4 to move vertically up and down, a circular concave curling forming groove 25 is arranged on the bottom surface 24 of the can mouth curling die 3, the curling forming groove 25 cooperates with the outer corner part 26 of the top surface of the bulged rib inner die 10 for curling operation, the opening compensation module 21 is a wedge body, the front side of the wedge body has a front side surface 28 that can be flush with the bulging working side surfaces of the bulged rib inner dies 12, 13, the two sides of the front side surface 28 are respectively the inclined side surfaces 30 slidingly cooperating with the wall inclined surfaces 29 of the two adjacent bulged rib inner dies 12, 13, the rear part of the wedge body is a dovetail part 32 slidingly fitted on the inclined push grooves 31 of the two adjacent bulged rib inner dies 12, 13, when the bulged rib inner dies 12, 13 slide in the diagonal directions respectively, the dovetail part 32 is pushed through the inclined push grooves 31 to make the opening compensation module 21 move synchronously,When two adjacent bulging rib inner molds 12 and 13 slide to the bulging rib position, the front side 28 of the opening compensation module 21 just moves to the outer opening of the gap 27 between the two bulging rib inner molds 12 and 13 and fills the outer opening of the gap 27.

[0027] As Figure 7 shown, the function of the opening compensation module 21 in the above technical solution is to fill the gap 27 on the working side of the bulging rib that appears between the two adjacent bulging rib inner molds 12 and 13 when they open outwards, so as to avoid the gap 27 between the working sides of the bulging rib inner molds 12 and 13 when the bulging rib inner molds 12 and 13 are in the bulging rib position, and prevent the front stretchable bulging ring 16 from pressing the metal square can wall at the gap 27 to perform equal bulging rib deformation.

[0028] The inclination angles of the inclined side 28 of the opening compensation module 21, the inclined push grooves 31 of the two adjacent bulging rib inner molds 12 and 13, and the dovetail part 32 are all 45°.

[0029] The four bulging rib inner molds 10, 11, 12 and 13 are respectively provided with guiding sliding grooves 33 extending in the diagonal direction, and the guiding sliding grooves 33 are respectively slidably fitted on the limiting column bodies 34 on the bottom plate 9.

[0030] As Figure 4 shown, the central part 35 of the bottom plate of the annular groove 22 on the bottom plate 9 for the top opening of the metal square can body to rise into is connected to the machine base 1 through the limiting column body 34.

[0031] The bulging rib outer mold driver 18 is composed of a roller 36 installed on the bulging rib outer mold 14, a cylinder 37 installed on the machine base 1, an inclined push block 38 connected to the end of the piston rod of the cylinder 37, a pull rod 39 connected to the bulging rib outer mold 14 and sliding through the corresponding outer side plate 5 of the bulging rib outer mold 14, and a return compression spring 40 sleeved on the pull rod 39. Among them, the inclined push block 38 cooperates with the roller 36 to push the bulging rib outer mold 14 to move inwards, the return compression spring 40 is sleeved on the outer rod section of the pull rod 39 outside the corresponding outer side plate 5, one end abuts against the outer side surface of the corresponding outer side plate 5 and the other end abuts against the rod head 41 of the pull rod 39, and the return compression spring 40 pulls the bulging rib outer mold 14 to move outwards and return through the pull rod 39.

[0032] The driving mechanism 4 controls the downward movement of the can mouth curling die 3 through a downward pressing rod 42 driven by power, a lower pressing plate 43 fixedly connected to the downward pressing rod 42, and a vertical connecting rod 44 with one end connected to the lower pressing plate 43 and the other end connected to the can mouth curling die 3. The middle of the vertical connecting rod 44 is slidably fitted on the machine base 1. The driving mechanism 4 controls the upward return of the can mouth curling die 3 through a compression spring 45 sleeved on the downward pressing rod 42, with one end abutted against the machine base 1 and the other end abutted against the lower pressing plate 43.

[0033] The driving mechanism 4 controls the outward horizontal movement of the rib expanding inner dies 10, 11, 12, and 13 through a driving rod 46 that moves vertically up and down driven by power and a driving head 20 with an inclined conical side surface 19 connected to the lower end of the driving rod 46. The driving rod 46 slides vertically on the lower pressing plate 43 and the machine base 1. The driving mechanism 4 controls the upward return of the driving rod 46 through a compression spring 48 sleeved on the driving rod 46, with one end abutted against the machine base 1 and the other end abutted against a fixed seat 47 on the driving rod 46, so that the rib expanding inner dies 10, 11, 12, and 13 move horizontally inward for return under the action of the rib expanding inner die return shrinkage ring 17.

[0034] The telescopic expanding ring 16 is made of an elastic rubber ring with a certain hardness and sufficient strength.

[0035] The rib expanding inner die return shrinkage ring 17 is a metal tension spring ring or an elastic rubber ring.

[0036] During operation, the device of the present invention is installed above the automatic conveying line of the metal square can body on the automatic production equipment for making metal square cans. When the automatic conveying line of the metal square can body below conveys a metal square can body to the position below the device of the present invention, the lifting mechanism of the automatic production equipment lifts the metal square can body, allowing the top of the metal square can body to fit into the annular groove 22 on the bottom plate 9, and then the upper part of the metal square can body rises and enters the expansion matching position 23 of the expansion inner mold 10 and the expansion outer mold 14; then the driving rod 46 moves downward, and the oblique cone side surface 19 on the driving head 20 thereon drives the four expansion inner molds 10, etc. to slide outward in diagonal directions respectively, and at the same time, the oblique push grooves on the expansion inner molds 10, etc. 31 pushes the dovetail part 32 of the expansion compensation module 21 to move the expansion compensation module 21 outward. When the four expansion inner molds 10 etc. slide outward to reach the expansion matching position 23, the front side surface 28 of the expansion compensation module 21 etc. just fills the outer opening of the gap 27 between the expansion inner molds 10 etc. due to the expansion; at the same time, the cylinder 37 cooperates with the roller 36 through the inclined push block 38 to push the four expansion outer molds 14 etc. to slide inward from the front, back, left and right directions to reach the expansion matching position 23, and the grooves on the expansion outer molds 14 etc. and the extrusion cooperation of the retractable expansion ring 16 on the expansion inner mold 10 etc. expand on the tank wall below the top of the metal square can body. A circle of convex reinforcing ribs is formed; then the lower pressure rod 42 moves downward, and drives the can mouth curling die 3 to punch downward through the lower pressure plate 43 and the vertical connecting rod 44, and under the punching cooperation of the curling forming groove 25 of the can mouth curling die 3 and the top surface outer corner 26 of the rib expanding inner mold 10, the top mouth edge of the metal square can body is bent into the can and formed into a curled state; then the lower pressure rod 42, the lower pressure plate 43 and the vertical connecting rod 44 move upward under the action of the compression spring 45, and control the can mouth curling die 3 to rise and return, and the curling forming groove 25 withdraws from the top mouth edge of the metal square can body; then the driving rod 46 controls the driving head 20 to move upward and return under the action of the compression spring 48, and the four rib expanding inner molds 10 are in the rib expanding inner mold Under the action of the return shrinkage ring 17, they move back inward in a diagonal direction, and at the same time, the oblique push groove 31 on the expansion inner mold 10 and the like pushes the dovetail part 32 of the opening compensation module 21, so that the opening compensation module 21 moves back inward, and the telescopic expansion ring 16 withdraws from the reinforcement rib of the tank wall; at the same time, the cylinder 37 controls the oblique push block 38 to retreat, and the four expansion outer molds 14 and the like slide back outward under the action of the pull rod 39 and the return compression spring 40 respectively; then the lifting mechanism of the automatic production equipment lowers the metal square can body, and the upper part of the metal square can body that has been expanded and rolled up withdraws from the annular groove 22 on the bottom plate 9, and the expansion rib and rolling up of the can mouth of a metal square can body are completed.

Claims

1. A continuous manufacturing device for bulging ribs and curling the can mouth of a metal square can, comprising a machine base and a rib bulging mechanism, a can mouth curling die and a driving mechanism arranged on the machine base, characterized in that: The base is installed above the automatic conveying line of the metal square can body on the frame of the automatic production equipment for manufacturing metal square cans. The driving mechanism is installed on the upper part of the base. The bulging rib mechanism and the can mouth curling die are respectively installed on the lower part of the base. The lower part of the base includes four outer side plates arranged in the front, rear, left, and right directions and a bottom plate fixed on the outer side plates. The bulging rib mechanism is installed on the upper surface of the bottom plate inside the four outer side plates. The bulging rib mechanism includes four bulging rib inner dies that slide horizontally in the diagonal direction respectively, four bulging rib outer dies that slide horizontally in the front, rear, left, and right directions respectively, a telescopic bulging ring sleeved on the bulging rib working surfaces of the four bulging rib inner dies, a bulging rib inner die return shrinkage ring sleeved on the four bulging rib inner dies, and a bulging rib outer die driver that drives and cooperates with the four bulging rib outer dies. There is a driving head with an inclined conical side surface that moves vertically up and down on the driving mechanism. The driving head extends downward to the driven inclined surface of the bulging rib inner die and is drivingly cooperated with it by the inclined conical side surface. An opening compensation module is respectively arranged between every two adjacent bulging rib inner dies. There is an annular groove on the bottom plate for the top opening of the metal square can body to rise and enter. The bulging rib cooperation position of the bulging rib inner die and the bulging rib outer die is above the annular groove. The can mouth curling die is arranged above the bulging rib inner die and is controlled by the driving mechanism to move up and down in the vertical direction. There is a circle of concave curling forming grooves on the bottom surface of the can mouth curling die. The curling forming grooves cooperate with the top outer corner parts of the bulging rib inner die for curling operation. The opening compensation module is a wedge body. The front side of the wedge body has a front side surface that can be flush with the bulging rib working surface of the bulging rib inner die. The two sides of the front side surface are respectively inclined side surfaces that slide and cooperate with the wall inclined surfaces of two adjacent bulging rib inner dies. The rear part of the wedge body is a dovetail part that slides and cooperates on the inclined pushing grooves of two adjacent bulging rib inner dies. When the bulging rib inner die slides in the diagonal direction, it pushes the dovetail part through the inclined pushing groove, so that the opening compensation module moves synchronously. When two adjacent bulging rib inner dies slide to the bulging rib operation position, the front side surface of the opening compensation module just moves to the outer opening of the gap between the two bulging rib inner dies and fills the outer opening of the gap.

2. The continuous manufacturing device for bulging ribs and curling the can mouth of the metal square can according to claim 1, characterized in that: The inclination angles of the inclined side surfaces of the wedge body, the inclined pushing grooves of the two adjacent bulging rib inner dies, and the dovetail part of the wedge body are all 45°.

3. The continuous production device for bulging ribs and curling the can mouth of the metal square can according to claim 1 or 2, characterized in that: The four bulging rib inner dies are respectively provided with guiding sliding grooves that extend in the diagonal direction. The guiding sliding grooves are respectively slidingly cooperated with the limiting column bodies on the bottom plate.

4. The device for continuously manufacturing the bulging ribs and curling the can mouth of the metal square can according to claim 3, characterized in that: The central part of the bottom plate of the annular groove on the bottom plate for the top opening of the metal square can body to rise and enter is connected to the base through the limiting column bodies.

5. The device for continuously manufacturing the ribbing and curling of the can mouth of the metal square can according to claim 1 or 2, characterized in that: The external die driver for the swelling rib consists of a roller mounted on the external die of the swelling rib, a cylinder mounted on the machine base, an inclined push block connected to the end of the piston rod of the cylinder, a pull rod connected to the external die of the swelling rib and sliding through the corresponding outer plate of the external die of the swelling rib, and a return compression spring sleeved on the pull rod. The inclined push block cooperates with the roller to push the external die of the swelling rib to move inward. The return compression spring is sleeved on the outer rod section of the pull rod outside the corresponding outer plate, with one end pressing against the outer side surface of the corresponding outer plate and the other end pressing against the rod head of the outer rod section. The return compression spring pulls the external die of the swelling rib to move outward and return through the pull rod.

6. The continuous production device for bulging ribs and curling the can mouth of the metal square can according to claim 1 or 2, characterized in that: The drive mechanism controls the downward movement of the can mouth curling die through a downward pressure rod driven by power, a lower pressure plate fixedly connected to the downward pressure rod, and a vertical connecting rod with one end connected to the lower pressure plate and the other end connected to the can mouth curling die. The middle of the vertical connecting rod is slidably fitted on the machine base. The drive mechanism controls the upward return of the can mouth curling die through a compression spring sleeved on the downward pressure rod, with one end pressing against the machine base and the other end pressing against the lower pressure plate.

7. The device for continuously manufacturing the ribbing and curling of the can mouth of the metal square can according to claim 6, characterized in that: The drive mechanism controls the horizontal outward movement of the internal die of the swelling rib through a drive rod that moves vertically up and down driven by power and a drive head with an inclined conical side surface connected to the lower end of the drive rod. The drive rod slides vertically on the lower pressure plate and the machine base. The drive mechanism controls the upward return of the drive rod through a compression spring sleeved on the drive rod, with one end pressing against the machine base and the other end pressing against the fixed seat on the drive rod, so that the internal die of the swelling rib moves horizontally inward and returns under the action of the internal die return shrinking ring of the swelling rib.

8. The continuous manufacturing device for bulging ribs and curling the can mouth of the metal square can according to claim 1 or 2, characterized in that: The internal die return shrinking ring of the swelling rib is a metal spring ring or an elastic rubber ring.

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