Dustproof thermal forming die of nitrogen cylinder

Abstract

The utility model relates to the technical field of thermal forming dies, and particularly discloses a nitrogen cylinder dustproof thermal forming die which comprises a base, a pressing core and a nitrogen cylinder, the pressing core is slidably arranged on the top face of the base in the thickness direction of the base, and the nitrogen cylinder is arranged between the pressing core and the base. The nitrogen cylinder comprises a cylinder body and a piston rod arranged at one end of the cylinder body in a sliding mode, one end of the cylinder body is fixedly connected to the bottom wall of the material pressing core, and the end, located outside the cylinder body, of the piston rod is fixedly connected with the base. According to the nitrogen cylinder, the influence of impurities in the environment on the nitrogen cylinder can be weakened.

Description

Technical Field

[0001] The present application relates to the technical field of thermoforming molds, and particularly to a thermoforming mold with dust prevention for nitrogen cylinders. Background Art

[0002] The process of heating a material to a certain temperature and then quickly feeding the softened material into a specific mold for forming is called thermoforming, and thermoforming molds are used in the thermoforming process. Thermoforming molds generally include an upper mold and a lower mold. After forming is completed, the upper mold and the lower mold need to be separated to complete the demolding of the workpiece.

[0003] The lifting of the lower mold in a thermoforming mold is usually driven by a nitrogen cylinder. The nitrogen cylinder is vertically arranged, the cylinder body of the nitrogen cylinder is fixedly connected to the base, the piston of the nitrogen cylinder is slidably arranged directly above the cylinder body in the vertical direction, and the top surface of the piston is fixedly connected to the lower mold. Therefore, the movement of the piston can drive the lower mold to lift.

[0004] Since the working environment for thermoforming is relatively harsh, there are impurities such as scale, metal chips, and suspended matter in the environment. These impurities are likely to accumulate at the end face where the piston rod extends out of the cylinder body. As the piston rod continues to move, the dust accumulated on the end face of the cylinder body is easily brought into the cylinder body by the piston rod.

[0005] This causes wear of the sealing elements; at the same time, during production, along with the flow of gas and the operation of the nitrogen cylinder, impurities may also enter the cylinder body, causing wear to the sealing elements inside the nitrogen cylinder. After a long working time, the nitrogen cylinder will leak and fail due to damage to the sealing elements. Utility Model Content

[0006] In order to reduce the impact of impurities in the environment on the nitrogen cylinder and extend the service life of the nitrogen cylinder, the present application provides a thermoforming mold with dust prevention for nitrogen cylinders.

[0007] The thermoforming mold with dust prevention for nitrogen cylinders provided by the present application adopts the following technical solutions:

[0008] A thermoforming mold with dust prevention for nitrogen cylinders includes a base, a blank holder core, and a nitrogen cylinder. The blank holder core is slidably arranged on the top surface of the base along the thickness direction of the base. The nitrogen cylinder is arranged between the blank holder core and the base. The nitrogen cylinder includes a cylinder body and a piston rod slidably arranged at one end of the cylinder body. One end of the cylinder body is fixedly connected to the bottom wall of the blank holder core, and the end of the piston rod outside the cylinder body is fixedly connected to the base.

[0009] By adopting the above technical solution, one end of the piston rod located outside the cylinder body is arranged vertically downward, so that the nitrogen cylinder is reversely installed between the material pressing core and the base. Therefore, the junction between the piston rod and the cylinder body is arranged downward, and impurities falling from above are not easily dropped into the junction between the piston rod and the cylinder body, and impurities are not easily accumulated on the end face at the bottom of the cylinder body. In addition, since the cylinder body is fixedly connected to the material pressing core, the cylinder body can be driven to slide when the material pressing core slides, and the bottom end of the cylinder body can slide along with it. Therefore, when the cylinder body is in a moving state, impurities are not easily accumulated at the bottom end of the cylinder body. Moreover, in the punching die, during the punching process, the vibration caused by the closing of the upper and lower dies can also be transmitted to the cylinder body. Since the bottom end of the cylinder body faces downward, some impurities on the end face at the bottom of the cylinder body can be shaken off, thereby reducing the accumulation of impurities, reducing the impurities entering the cylinder body through the junction between the piston rod and the cylinder body, reducing the wear of the seal, and helping to extend the service life of the nitrogen cylinder.

[0010] Optionally, a dust removal assembly is arranged on the outer side of the cylinder body. The dust removal assembly includes a cylinder body, a plunger, a hose and a driving member. The length direction of the cylinder body is parallel to the length direction of the cylinder body. The cylinder body is fixedly connected to the base. One end of the plunger slides along the length direction of the cylinder body in the cylinder body. An air outlet is formed on the cylinder body. One end of the hose is connected to the air outlet, and the other end of the hose is fixedly connected to the cylinder body and faces the junction between the cylinder body and the piston rod. The driving member is arranged on the plunger and is used to drive the plunger to slide.

[0011] By adopting the above technical solution, when the driving member drives the plunger to move downward, the volume of the cavity formed between the end of the plunger and the inner wall of the cylinder body can be reduced. Under the action of air pressure, the air in the cylinder body is discharged through the hose, so as to blow the junction between the cylinder body and the plunger and clean the accumulated impurities. Therefore, the impurities accumulated at the bottom end of the cylinder body can be further reduced.

[0012] Optionally, the driving member includes a connecting rod, and the connecting rod is fixedly connected between the end of the plunger located outside the cylinder body and the cylinder body.

[0013] By adopting the above technical solution, when the cylinder body moves, the plunger can be driven to move through the connecting rod. Therefore, no additional power source is required for the movement of the plunger, which is more energy-saving.

[0014] Optionally, an annular pipe is sleeved on the outer side of the cylinder body. The end of the hose away from the cylinder body is communicated with the inside of the annular pipe. A plurality of exhaust pipes are annularly arranged on the inner wall of the annular pipe. The exhaust pipes are communicated with the inside of the annular pipe, and the outlets of the exhaust pipes face the junction between the cylinder body and the piston rod.

[0015] By adopting the above technical solution, the gas discharged from the end of the hose can flow into the annular pipe and then be discharged through multiple exhaust pipes on the annular pipe, thereby increasing the coverage range of the discharged gas and helping to enhance the cleaning effect on impurities.

[0016] Optionally, an installation ring is fixedly connected to the outer wall of the cylinder block. The annular pipe is located on the side of the installation ring close to the base. The annular pipe is slidably arranged on the installation ring along the length direction of the cylinder block, and an elastic member is arranged between the annular pipe and the installation ring.

[0017] By adopting the above technical solution, the annular pipe is connected to the installation ring through the elastic member. During the process that the cylinder block moves downward and the piston rod completely slides into the cylinder block, the annular pipe can move upward relative to the cylinder block and make way; after the cylinder block moves upward, the elastic member can reset the annular pipe and make the outlet of the exhaust pipe on the annular pipe face the junction between the cylinder block and the piston rod again, so as to ensure the subsequent cleaning effect.

[0018] Optionally, an elastic pad for abutting against the base is arranged on the side of the annular pipe close to the base.

[0019] By adopting the above technical solution, during the process that the annular pipe moves downward and contacts the base, the elastic pad can play a buffering role, thereby protecting the annular pipe.

[0020] Optionally, multiple sets of dust removal assemblies are provided. The multiple sets of dust removal assemblies are arranged at intervals around the circumference of the cylinder block, and each hose is communicated with the inside of the annular pipe.

[0021] By adopting the above technical solution, during the process that the cylinder block moves downward, the air in the inner cavity of each cylinder body can be discharged into the annular pipe, so the amount of gas discharged from the exhaust pipes on the annular pipe can be increased, thereby enhancing the wind force and helping to enhance the dust removal effect.

[0022] Optionally, a filter element is arranged at the outlet of the exhaust pipe.

[0023] By adopting the above technical solution, when the cylinder block moves upward, the cylinder block drives the plunger to move upward through the connecting rod, air can enter the cylinder body, and the filter element can filter the air entering the cylinder body, filtering out impurities in the air, thereby reducing the impurities accumulated on the inner wall of the cylinder body and helping the plunger to slide smoothly.

[0024] Optionally, a connecting ring is detachably arranged at the outlet of the exhaust pipe, and the filter element is fixedly connected to the connecting ring.

[0025] By adopting the above technical solution, the filter element is detachably arranged, which is convenient to remove and replace the filter element, so as to ensure the filtering effect.

[0026] Optionally, the connection ring and the exhaust pipe are threadedly connected.

[0027] By adopting the above technical solution, the installation and disassembly process of the connection ring is simple.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The nitrogen cylinder is reversely installed between the blank holding core and the base, so that the junction between the cylinder block and the piston rod faces downward, making it difficult for impurities to accumulate at the junction between the cylinder block and the piston rod, thereby reducing the impurities entering the cylinder body and contributing to extending the service life of the nitrogen cylinder.

[0030] 2. During the working process, when the cylinder block moves downward, the plunger can be driven to move downward through the connecting rod, so that the air in the cylinder body is discharged outward through the hose, the annular pipe and the exhaust pipe in sequence, and the junction between the cylinder block and the piston rod is blown, thereby cleaning the impurities at this place and further reducing the accumulated impurities. Description of the Drawings

[0031] Figure 1 is the front view of Embodiment 1 of the present application;

[0032] Figure 2 is the overall structural schematic diagram of Embodiment 2 of the present application;

[0033] Figure 3 is the sectional view of Embodiment 2 of the present application;

[0034] Figure 4 is Figure 3 the enlarged schematic view of A in

[0035] Reference numerals: 1, base; 2, blank holding core; 3, nitrogen cylinder; 31, cylinder block; 32, piston rod; 4, dust removal assembly: 41, cylinder body; 411, air outlet; 42, plunger; 421, rod body; 422, stopper; 43, hose; 44, connecting rod; 5, annular pipe; 51, elastic pad; 52, convex block; 6, exhaust pipe; 7, mounting ring; 71, guide rod; 8, elastic member; 9, filter element; 10, connection ring; 11, limiting sleeve. Detailed Description of the Embodiments

[0036] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0037] Embodiment 1

[0038] The embodiment of the present application discloses a hot forming die for dust prevention of a nitrogen cylinder. Refer to Figure 1, the hot forming die for nitrogen cylinder dust prevention includes a base 1, a blank holder 2 and a nitrogen cylinder 3. The top surface of the base 1 is horizontally arranged, and the thickness direction of the base 1 is vertically arranged. The blank holder 2 is slidably arranged on the top wall of the base 1 in the vertical direction. A limiting sleeve 11 is arranged between the blank holder 2 and the base 1 to limit the sliding of the blank holder 2, making the sliding process of the blank holder 2 more stable.

[0039] The nitrogen cylinder 3 is arranged between the base 1 and the blank holder 2, and multiple nitrogen cylinders 3 are provided. The nitrogen cylinder 3 includes a cylinder body 31 and a piston rod 32 slidably arranged at one end of the cylinder body 31. The cylinder body 31 is vertically arranged, and the outer wall at the top end of the cylinder body 31 is fixedly connected to the bottom wall of the blank holder 2; the piston rod 32 is located below the cylinder body 31, and the bottom end of the piston rod 32 is fixedly connected to the top wall of the base 1.

[0040] The implementation principle of Embodiment 1 is: when the piston rod 32 extends, the cylinder body 31 can be lifted, thereby driving the blank holder 2 to lift; when the piston rod 32 retracts, the cylinder body 31 can be lowered, thereby driving the blank holder 2 to lower. Since the nitrogen cylinder 3 is installed reversely, the bottom end of the cylinder body 31 faces downward, and impurities are not easily accumulated on the end face of the cylinder body 31, which helps to extend the service life of the nitrogen cylinder 3.

[0041] Embodiment 2

[0042] Refer to Figure 2 、 Figure 3 and Figure 4 , the difference between this embodiment and Embodiment 1 is that a dust removal assembly 4 is arranged on the outside of each cylinder body 31 in this embodiment. The dust removal assembly 4 includes a cylinder body 41, a plunger 42, a hose 43 and a driving member. The cylinder body 41 is a cylinder, the axis of the cylinder body 41 is vertically arranged, and the bottom end of the cylinder body 41 is fixedly connected to the top wall of the base 1; an air outlet 411 is arranged on the bottom wall of the cylinder body 41. The plunger 42 includes a rod body 421 and a stopper 422 fixedly connected to the bottom end of the rod body 421; one end of the rod body 421 is slidably arranged in the cylinder body 41, and the other end of the rod body 421 passes through the top wall of the cylinder body 41; the stopper 422 is located inside the cylinder body 41, the stopper 422 is cylindrical, and the side wall of the stopper 422 abuts against the inner wall of the cylinder body 41. Therefore, air can be pumped when the plunger 42 moves upward, and air can be exhausted when the plunger 42 moves downward. One end of the hose 43 is fixedly connected to the air outlet 411 of the cylinder body 41, and the hose 43 is internally connected to the air outlet 411; the other end of the hose 43 is arranged at the bottom end of the cylinder body 31, and the end of the hose 43 faces the bottom wall of the cylinder body 31. Therefore, when the air in the cylinder body 41 is discharged outward through the hose 43, the bottom wall of the cylinder body 31 can be blown, so as to clean the impurities on the bottom wall of the cylinder body 31.

[0043] Refer to Figure 2 and Figure 4, the driving member is a connecting rod 44. One end of the connecting rod 44 is fixedly connected to the outer wall of the top end of the cylinder block 31, and the other end of the connecting rod 44 is fixedly connected to one end of the rod body 421 located outside the cylinder body 41. Therefore, when the cylinder block 31 moves, the plunger 42 can be driven to move synchronously through the connecting rod 44. The displacement of the plunger 42 is not less than that of the cylinder block 31, so the setting of the plunger 42 will not affect the movement of the cylinder block 31.

[0044] Further, an annular pipe 5 is coaxially sleeved outside the cylinder block 31, and a cavity is arranged inside the annular pipe 5. One end of the hose 43 far from the cylinder body 41 is fixedly connected to the outer wall of the annular pipe 5, and the hose 43 is communicated with the cavity inside the annular pipe 5. Therefore, the air discharged from the cylinder body 41 can flow into the annular pipe 5 through the hose 43. A plurality of exhaust pipes 6 are fixedly connected to the inner wall of the annular pipe 5 and are arranged in a circumferential array; one end of the exhaust pipe 6 is communicated with the inside of the annular pipe 5, and the other end of the exhaust pipe 6 faces the bottom wall of the cylinder block 31. Therefore, the air in the annular pipe 5 can be discharged outward through the exhaust pipe 6, so as to blow the bottom wall of the cylinder block 31. The arrangement of the annular pipe 5 and the exhaust pipe 6 increases the coverage area of the blowing, which helps to enhance the dust removal effect.

[0045] An installation ring 7 is also fixedly connected to the outer wall of the cylinder block 31, and the annular pipe 5 is located below the installation ring 7. A guide rod 71 is vertically fixedly connected to the bottom wall of the installation ring 7, and a convex block 52 is fixedly connected to the outer wall of the annular pipe 5. A guide hole is opened on the convex block 52, and the guide rod 71 slidably passes through the guide hole, so that the annular pipe 5 is slidably arranged outside the cylinder along the vertical direction. An elastic member 8 is fixedly connected between the top wall of the annular pipe 5 and the bottom wall of the installation ring 7, and the elastic member 8 is a spring. Therefore, when the cylinder block 31 moves downward so that the piston rod 32 completely slides into the cylinder block 31, the annular pipe 5 can slide upward relative to the cylinder block 31, thus avoiding the annular pipe 5 from affecting the working process of the nitrogen cylinder 3.

[0046] Further, an elastic pad 51 is fixedly bonded to the bottom wall of the annular pipe 5, and the elastic pad 51 is made of rubber. Therefore, when the annular pipe 5 abuts against the base 1, the elastic pad 51 can play a certain buffering role, thus protecting the annular pipe 5.

[0047] In order to enhance the cleaning effect of the impurities on the bottom wall of the cylinder block 31, multiple sets of dust removal assemblies 4 are provided. The multiple sets of dust removal assemblies 4 are arranged in a circumferential array around the cylinder block 31, and the end of the hose 43 in each set of dust removal assemblies 4 is communicated with the inside of the annular pipe 5. Therefore, when the cylinder block 31 moves downward, all the plungers 42 can be driven to move downward, so that the air in each cylinder body 41 can be discharged, thereby increasing the air output of the exhaust pipe 6, which helps to enhance the cleaning effect.

[0048] At the outlet of the exhaust pipe 6, there is also a connecting ring 10 connected by threads. One end of the connecting ring 10 is fixedly connected with a filtering element 9. The filtering element 9 is a sheet-like structure made of non-woven filter cotton. Therefore, the filtering element 9 can filter the air entering the cylinder body 41, reduce the impurities entering the cylinder body 41, and contribute to the normal operation of the plunger 42.

[0049] The implementation principle of Embodiment 2 is as follows: When the cylinder block 31 moves downward, it can drive the plunger 42 to move downward through the connecting rod 44. The downward movement of the plunger 42 enables the air in the cylinder body 41 to be discharged to the annular pipe 5 through the air outlet 411, and then the air in the annular pipe 5 is discharged through the exhaust pipe 6, thereby blowing air at the junction of the cylinder block 31 and the piston rod 32, blowing off the impurities here, and reducing the accumulation of impurities here. During the downward movement of the cylinder block 31, the annular pipe 5 can move together with the cylinder block 31. Therefore, the outlet of the exhaust pipe 6 on the annular pipe 5 can always face the junction of the cylinder block 31 and the piston rod 32, which helps to ensure the blowing position and thus ensure the cleaning effect. When the cylinder block 31 continues to move downward until the piston rod 32 completely slides into the cylinder block 31, the annular pipe 5 can move upward relative to the cylinder block 31 to avoid it, so that the cylinder block 31 can slide smoothly.

[0050] When the cylinder block 31 moves upward, the elastic member 8 causes the annular pipe 5 to reset. During the upward movement of the cylinder block 31, the cylinder block 31 drives the plunger 42 to move upward through the connecting rod 44, causing the cylinder body 41 to draw air and prepare for the next exhaust. Therefore, during each downward movement of the cylinder block 31, the bottom wall of the cylinder block 31 can be blown by the cooperation of the plunger 42 and the cylinder body 41, thereby realizing the cleaning of the bottom end of the cylinder block 31, reducing the impurities entering the interior of the cylinder block 31, and contributing to the extension of the service life of the cylinder block 31.

[0051] The above are the optional embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A nitrogen cylinder dustproof thermoforming mold, characterized in that: The invention comprises a base (1), a pressing core (2) and a nitrogen cylinder (3), wherein the pressing core (2) is slidably arranged on the top surface of the base (1) along the thickness direction of the base (1), and the nitrogen cylinder (3) is arranged between the pressing core (2) and the base (1). The nitrogen cylinder (3) comprises a cylinder body (31) and a piston rod (32) slidably arranged at one end of the cylinder body (31), one end of the cylinder body (31) is fixedly connected to the bottom wall of the pressing core (2), and the end of the piston rod (32) located outside the cylinder body (31) is fixedly connected to the base (1).

2. A nitrogen cylinder dustproof hot forming mold according to claim 1, characterized in that: A dust removal assembly (4) is arranged outside the cylinder body (31), and the dust removal assembly (4) comprises a cylinder body (41), a plunger (42), a hose (43) and a driving member. The length direction of the cylinder body (41) is parallel to the length direction of the cylinder body (31). The cylinder body (41) is fixedly connected to the base (1). One end of the plunger (42) is slidably arranged in the cylinder body (41) along the length direction of the cylinder body (41). An air outlet (411) is provided on the cylinder body (41). One end of the hose (43) is connected to the air outlet (411). The other end of the hose (43) is fixedly connected to the cylinder body (31) and faces the junction of the cylinder body (31) and the piston rod (32). The driving member is arranged on the plunger (42) and is used to drive the plunger (42) to slide.

3. A nitrogen cylinder dustproof hot forming mold according to claim 2, characterized in that: The driving member comprises a connecting rod (44), wherein the connecting rod (44) is fixedly connected between one end of the plunger (42) located outside the barrel (41) and the cylinder body (31).

4. A nitrogen cylinder dustproof hot forming mold according to claim 2, characterized in that: An annular tube (5) is sleeved on the outer side of the cylinder body (31); one end of the hose (43) away from the cylinder body (41) is connected to the inside of the annular tube (5); a plurality of exhaust pipes (6) are arranged on the inner wall of the annular tube (5); the exhaust pipes (6) are connected to the inside of the annular tube (5); and the outlets of the exhaust pipes (6) face the junction of the cylinder body (31) and the piston rod (32).

5. A nitrogen cylinder dustproof hot forming mold according to claim 4, characterized in that: A mounting ring (7) is fixedly connected to the outer wall of the cylinder body (31); the annular tube (5) is located on a side of the mounting ring (7) close to the base (1); the annular tube (5) is slidably arranged on the mounting ring (7) along the length direction of the cylinder body (31); and an elastic member (8) is arranged between the annular tube (5) and the mounting ring (7).

6. A nitrogen cylinder dustproof hot forming mold according to claim 4, characterized in that: An elastic pad (51) for abutting against the base (1) is provided on one side of the annular tube (5) close to the base (1).

7. A nitrogen cylinder dustproof hot forming mold according to claim 4, characterized in that: The dust removal components (4) are provided in multiple groups, and the multiple groups of dust removal components (4) are spaced apart by rings arranged on the circumferential side of the cylinder body (31), and each of the hoses (43) is connected to the interior of the annular tube (5).

8. The nitrogen cylinder dustproof thermoforming mold according to claim 4, characterized in that: A filter element (9) is provided at the outlet of the exhaust pipe (6).

9. A nitrogen cylinder dustproof thermoforming mold according to claim 8, characterized in that: A connecting ring (10) is detachably provided at the outlet of the exhaust pipe (6), and the filter element (9) is fixedly connected to the connecting ring (10).

10. A nitrogen cylinder dustproof thermoforming mold according to claim 9, characterized in that: The connecting ring (10) and the exhaust pipe (6) are threadedly connected.

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