Pre-pressing device for sealing gasket production

Abstract

The invention relates to the technical field of sealing gasket machining, in particular to a sealing gasket production pre-pressing device which comprises an L-shaped base, a supporting plate is fixedly connected to one end of the bottom of the inner side of the L-shaped base, a pre-pressing detection mold is fixedly connected to the upper end of the supporting plate, and a circular extrusion groove is formed in the side, close to a side plate of the L-shaped base, of the pre-pressing detection mold. An extrusion groove is formed in the bottom of the discharging mechanism, sliding grooves are symmetrically formed in the inner side wall of the extrusion groove, a plurality of through holes are formed in the bottom of the extrusion groove in an annular array mode, and a circular boss is fixedly connected to the center of the bottom of the extrusion groove. At the moment, the circular boss is sleeved with the discharging annular base, and meanwhile, the rear side of the discharging annular base abuts against the bottom of the extrusion groove, so that the discharging annular base and the sliding plate cannot continue to move backwards; and the extrusion side of the extrusion head moves to one side above the limiting mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of sealing gasket processing, in particular to a sealing gasket production pre-pressing device. Background Art

[0002] Gaskets and seals play a crucial role in modern industrial enterprises. The quality of seals is directly related to production continuity, property safety, energy conservation and environmental protection, and human health. Therefore, the development of gaskets is gaining increasing attention. Sealing gaskets are made from metal or non-metallic sheets through cutting, stamping, or shearing processes. They are used to seal connections between pipes and between mechanical components of machinery and equipment. Based on the material, they can be divided into metal and non-metallic sealing gaskets.

[0003] Some sealing gaskets need to be pre-pressed after production. For example, rubber sealing gaskets may have bubbles, uneven concentration, and impurities during production, which may result in poor ductility and sealing properties after production. In this case, these gaskets need to be pre-pressed using a pre-pressing device to test the functionality, ductility, and safety of the rubber sealing gaskets.

[0004] The sealing gasket will be deformed after being squeezed by the pre-pressing device. When the squeezing force is removed, the rubber sealing gasket will rebound in two ways: qualified or unqualified. When the pre-pressing device is testing the rubber sealing gasket, in order to ensure the accuracy of the pre-pressing, it is mostly necessary to place it in the extrusion groove of the inspection mold. After the pre-pressing test is completed, the staff needs to manually remove the tested rubber sealing gasket. The rubber sealing gasket that fails to rebound will adhere to the extrusion groove of the inspection mold due to excessive squeezing, which is very inconvenient to remove. Not only does it increase the burden on the staff, but the efficiency of manual material removal is low, which is not conducive to actual production. Summary of the Invention

[0005] The object of the present invention is to provide a pre-pressing device for producing sealing gaskets to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealing gasket production pre-pressing device, comprising an L-shaped base, one end of the inner bottom of the L-shaped base is fixedly connected to a support plate, the upper end of the support plate is fixedly connected to a pre-pressing detection mold, a circular extrusion groove is provided on one side of the pre-pressing detection mold close to the side plate of the L-shaped base, slide grooves are symmetrically provided on the inner side wall of the extrusion groove, a plurality of through holes are provided in an annular array on the bottom of the extrusion groove, a circular boss is fixedly connected at the center of the bottom of the extrusion groove, a collecting box is provided at the bottom of the L-shaped base below the pre-pressing detection mold, a feeding pipe is fixedly installed on the upper end of the side of the pre-pressing detection mold on which the extrusion groove is provided, and rubber sealing gaskets are installed in sequence from top to bottom in the inner cavity of the feeding pipe; An extrusion mechanism is fixedly installed on the side plate of the L-shaped base, and a unloading mechanism for pushing the rubber sealing gasket out of the extrusion groove is installed on the extrusion mechanism. A limiting mechanism for supporting the rubber sealing gasket is fixedly installed at the lower end of the pre-compression detection mold on one side of the extrusion groove. Locking mechanisms are symmetrically installed at the lower ends of the left and right sides of the feed pipe, and an unlocking mechanism is symmetrically installed at the upper end of the extrusion mechanism.

[0007] As a further solution of the present invention, the extrusion mechanism includes a first hydraulic cylinder fixedly mounted on the outer side of the side plate of the L-shaped base, one end of the inner rod of the first hydraulic cylinder passes through the side plate of the L-shaped base and is fixedly mounted with a connecting plate, a second hydraulic cylinder is fixedly mounted on the same side of the connecting plate and the first hydraulic cylinder, and one end of the inner rod of the second hydraulic cylinder passes through the connecting plate and is fixedly mounted with an extrusion head.

[0008] As a further solution of the present invention, the unloading mechanism includes a unloading annular seat arranged near the extrusion side of the extrusion head, and the outer side surface of the unloading annular seat is symmetrically fixedly connected with a slide, and the two slides are provided with a through hole at the end away from the unloading annular seat, and a guide connecting rod is inserted through the two through holes, and the end of the guide connecting rod away from the connecting plate is fixedly sleeved with an anti-slip ring, and the other end of the guide connecting rod is sleeved with a buffer spring, and the end of the guide connecting rod close to the connecting plate is fixedly connected with a cylinder, and the end of the cylinder away from the guide connecting rod is fixedly connected to the side of the connecting plate, and the two ends of the buffer spring are respectively abutted against the slide and the cylinder, and the side surface of the unloading annular seat is provided with a plurality of mounting holes in a circular array, and an auxiliary pushing mechanism is fixedly installed in each mounting hole.

[0009] As a further solution of the present invention, the unloading annular seat is clamped with the extrusion groove, and the unloading annular seat is movably sleeved on the outside of the circular boss, the slide plate is slidably connected to the slide groove back and forth, and the guide connecting rod is slidably connected to the through hole.

[0010] As a further solution of the present invention, the auxiliary pushing mechanism includes a sleeve fixedly installed in the mounting hole on the side of the unloading annular seat, the end of the sleeve close to the extrusion head is open, and the unopened end of the sleeve is slidably inserted with a light rod, one end of the light rod passes through the sleeve and extends to its inner cavity, the end of the light rod in the inner cavity of the sleeve is sleeved with a limiting spring, and the end of the light rod in the inner cavity of the sleeve is fixedly connected with a push head, the two ends of the limit spring are respectively abutted against the bottom of the inner cavity of the sleeve and the push head, the push head is stuck in the open end of the sleeve, and the end of the light rod away from the push head is fixedly sleeved with a positioning ring.

[0011] As a further solution of the present invention, the limiting mechanism includes a fan-shaped seat fixedly installed at the lower end of one side of the pre-stressing detection mold, and the fan-shaped seat is symmetrically provided with a shrinkage groove on one side close to the pre-stressing detection mold, and the two shrinkage grooves are symmetrically distributed in an eight-shaped shape. Fan-shaped limit blocks are slidably installed in the two shrinkage grooves, and the front and rear ends of the inner sides of the two fan-shaped limit blocks are provided with extrusion slopes. The outer sides of the two fan-shaped limit blocks are symmetrically fixedly connected with guide plates, and the lower end of the guide plate extends through the shrinkage groove to the outside and is fixedly connected with an anti-slip plate. The outer side of the fan-shaped limit block is provided with a reset spring between the two guide plates, and one side of the reset spring abuts against the bottom of the shrinkage groove.

[0012] As a further solution of the present invention, rectangular grooves are symmetrically penetrated at the lower ends of the left and right sides of the feed pipe, and the locking mechanism includes a concave plate fixedly installed at the lower end of the side of the feed pipe, the concave plate is on the outside of the rectangular groove, and a concave transmission block is provided on the side of the concave plate away from the feed pipe, and a sliding rod is fixedly connected to the side of the concave transmission block close to the concave plate, one end of the sliding rod passes through the side of the concave plate and extends to the inner side thereof, a locking spring is sleeved on the sliding rod, and a locking block is fixedly connected to the end of the sliding rod away from the concave transmission block, and the two ends of the locking spring are respectively abutted against the concave plate and the locking block.

[0013] As a further solution of the present invention, one side of the locking block extends through the rectangular groove to the inner cavity of the feed pipe, and the locking block is located on one side of the inner cavity of the feed pipe and contacts the side of the rubber sealing gasket, and the side of the locking block in contact with the rubber sealing gasket is set as a curved surface.

[0014] As a further solution of the present invention, the unlocking mechanism is fixedly installed on the upper end of the connecting plate, and the unlocking mechanism includes an L-shaped frame fixedly installed on the upper end of the connecting plate. The end of the L-shaped frame away from the connecting plate is fixedly connected to an isosceles trapezoidal block, and the isosceles trapezoidal block is arranged on the side relatively away from the two L-shaped frames.

[0015] The beneficial effects of the present invention are: 1. During the inspection, the extrusion mechanism is first used to drive the unloading mechanism to move backward, so that the slide plate abuts against the slide groove. At this time, the unloading annular seat is sleeved on the circular boss, and the rear side of the unloading annular seat abuts against the bottom of the extrusion groove, so that the unloading annular seat and the slide plate cannot move further backward; the extrusion side of the extrusion head is moved to the side above the limit mechanism. At this time, there is a certain gap between the extrusion side of the extrusion head and the push head. This gap is just enough to allow the rubber sealing gasket to be stuck downward, waiting for the automatic loading of the rubber sealing gasket.

[0016] 2. When the extrusion mechanism moves backward, it drives the unlocking mechanism to move synchronously, so that the unlocking mechanism unlocks the locking mechanism, and the two locking blocks move away from each other, so that the two locking blocks release the lock on the rubber sealing gasket. At this time, the rubber sealing gasket falls downward along the inner cavity of the feed pipe to the upper end of the limit mechanism under the action of its own gravity, so that the rubber sealing gasket is at the upper end of the two fan-shaped limit blocks, completing the automatic loading of the rubber sealing gasket.

[0017] 3. The inner rod of the second hydraulic cylinder is extended to make the extrusion head continue to move backward, so that the extrusion head pushes the rubber sealing gasket to move into the extrusion groove, so that the rubber sealing gasket is removed from the upper end of the sector limit block, and at the same time the rubber sealing gasket is sleeved on the circular boss; in this process, the rubber sealing gasket is firmly clamped and positioned by the cooperation of the auxiliary pushing mechanism and the extrusion head, so that the rubber sealing gasket can be stably moved backward into the extrusion groove; when the pushing head is stuck in the sleeve, one side of the rubber sealing gasket contacts the front side of the unloading annular seat. At this time, the extrusion head continues to move backward, and the unloading annular seat cannot move backward. The rubber sealing gasket is squeezed by the cooperation of the extrusion head and the unloading annular seat, thereby performing a pre-compression test on the rubber sealing gasket.

[0018] 4. After the test is completed, the extrusion mechanism is reset, and the extrusion mechanism drives the unloading mechanism to move back, pushing the rubber sealing gasket out of the extrusion groove through the unloading annular seat, and then the extrusion head and the rubber sealing gasket are separated by the contraction of the inner rod of the second hydraulic cylinder. The rubber sealing gasket falls downward under the action of its own gravity, thereby completing the unloading of the rubber sealing gasket, and the rubber sealing gasket that has been tested falls downward into the collection box, thereby completing the pre-compression test of the rubber sealing gasket.

[0019] 5. Through the provision of a discharge annular seat, even if the rubber sealing gasket is deformed or damaged and attached to the extrusion groove, the discharge annular seat can still push the rubber sealing gasket out of the extrusion groove to complete the unloading of the rubber sealing gasket. The unloading process is completed automatically without the need for manual operation by the staff. It is convenient and quick, and the rubber sealing gasket can be unloaded directly, greatly improving the detection efficiency of the rubber sealing gasket. During the pre-compression detection of the rubber sealing gasket, the rubber sealing gasket can be automatically loaded and unloaded, which not only reduces the burden on the staff, but also improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural stereogram of the pre-pressing device for producing the sealing gasket of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure at center A; Figure 3 This is a cross-sectional view of the structure of the pre-pressing device for producing the sealing gasket of the present invention; Figure 4This is a cross-sectional view of the local structure of the pre-pressing device for producing the sealing gasket of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B in the middle; Figure 6 It is a side sectional view of the limiting mechanism, feed pipe and locking mechanism structure of the present invention; Figure 7 This is a rear oblique sectional view of the pre-pressing detection die structure of the present invention; Figure 8 This is an exploded view of the limiting mechanism structure of the present invention; Figure 9 This is a cross-sectional view of the feed pipe and locking mechanism structure of the present invention; Figure 10 This is an exploded view of the structure of the pre-pressing device for producing the sealing gasket of the present invention.

[0021] Figure: 1. L-shaped base; 11. Support plate; 12. Pre-load detection die; 13. Extrusion groove; 14. Slide; 15. Through hole; 16. Circular boss; 17. Collection box; 2. First hydraulic cylinder; 21. Connecting plate; 22. Second hydraulic cylinder; 23. Extrusion head; 3. Unloading ring seat; 31. Slide plate; 32. Through hole; 33. Guide connecting rod; 34. Anti-slip ring; 35. Buffer spring; 36. Cylinder; 4. Sleeve; 41 , polished rod; 42, limit spring; 43, push head; 44, positioning ring; 5, fan-shaped seat; 51, contraction groove; 52, fan-shaped limit block; 53, extrusion slope; 54, guide plate; 55, anti-slip plate; 56, reset spring; 6, feed pipe; 61, rubber sealing gasket; 62, rectangular groove; 7, concave plate; 71, concave transmission block; 72, slide rod; 73, locking spring; 74, locking block; 8, L-shaped frame; 81, isosceles trapezoidal block. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 10The present invention provides a technical solution: a sealing gasket production pre-pressing device, comprising an L-shaped base 1, one end of the inner bottom of the L-shaped base 1 is fixedly connected to a support plate 11, the upper end of the support plate 11 is fixedly connected to a pre-pressing detection mold 12, the pre-pressing detection mold 12 is provided with a circular extrusion groove 13 on one side of the side plate close to the L-shaped base 1, and the inner side wall of the extrusion groove 13 is symmetrically provided with a slide groove 14, the bottom of the extrusion groove 13 is provided with a plurality of through holes 15 in an annular array, a circular boss 16 is fixedly connected at the bottom center of the extrusion groove 13, and a plurality of through holes 15 are distributed in an annular array on the outside of the circular boss 16, a collecting box 17 is provided at the bottom of the L-shaped base 1 below the pre-pressing detection mold 12, a feeding pipe 6 is fixedly installed on the upper end of the side where the extrusion groove 13 is provided, and a rubber sealing gasket 61 is installed in the inner cavity of the feed pipe 6 in sequence from top to bottom; An extrusion mechanism is fixedly installed on the side panel of the L-shaped base 1, and a unloading mechanism is installed on the extrusion mechanism for pushing the rubber sealing gasket 61 out of the extrusion groove 13. The lower end of the pre-compression detection mold 12 on one side of the extrusion groove 13 is fixedly installed with a limiting mechanism for supporting the rubber sealing gasket 61. Locking mechanisms are symmetrically installed at the lower ends of the left and right sides of the feed pipe 6. The locking mechanisms are set to prevent the rubber sealing gasket 61 from sliding downward along the inner cavity of the feed pipe 6 at will. An unlocking mechanism is symmetrically installed on the upper end of the extrusion mechanism, and the unlocking mechanism is used to release the restriction of the locking mechanism on the rubber sealing gasket 61.

[0024] See also Figure 1 、 Figure 3 and Figure 10 The extrusion mechanism includes a first hydraulic cylinder 2 fixedly mounted on the outer side of the side plate of the L-shaped base 1, one end of the inner rod of the first hydraulic cylinder 2 passes through the side plate of the L-shaped base 1 and is fixedly mounted with a connecting plate 21, a second hydraulic cylinder 22 is fixedly mounted on the same side of the connecting plate 21 and the first hydraulic cylinder 2, and one end of the inner rod of the second hydraulic cylinder 22 passes through the connecting plate 21 and is fixedly mounted with an extrusion head 23.

[0025] The extrusion head 23 is aligned with the extrusion groove 13 in front and back, and the extrusion head 23 is a circular extrusion block, and the extrusion head 23 and the extrusion groove 13 are coaxially distributed; The inner rod of the first hydraulic cylinder 2 is extended and retracted to drive the connecting plate 21 to move forward and backward, and the connecting plate 21 drives the second hydraulic cylinder 22 to move forward and backward synchronously. When the connecting plate 21 stops, the inner rod of the second hydraulic cylinder 22 is extended and retracted to drive the extrusion head 23 to move forward and backward. The first hydraulic cylinder 2 and the second hydraulic cylinder 22 are both controlled by the electromagnetic reversing valve and PLC; the electromagnetic reversing valve is controlled to be on and off by PLC or relay, and the oil circuit is switched in sequence, thereby realizing the operation of the first hydraulic cylinder 2 and the second hydraulic cylinder 22.

[0026] During operation, the inner rod of the first hydraulic cylinder 2 is extended to cause the connecting plate 21 to drive the second hydraulic cylinder 22 to move backward, and the second hydraulic cylinder 22 drives the extrusion head 23 to move backward. When the connecting plate 21 moves to the appropriate position, the inner rod of the first hydraulic cylinder 2 stops extending. At this time, after waiting for a while, the inner rod of the second hydraulic cylinder 22 is extended again to cause the extrusion head 23 to continue to move backward, so that the extrusion head 23 is inserted into the extrusion groove 13, thereby performing an extrusion test on the rubber sealing gasket 61. After the test is completed, the inner rod of the first hydraulic cylinder 2 is contracted to cause the connecting plate 21 to drive the second hydraulic cylinder 22 to move forward. The connecting plate 21 drives the extrusion head 23 to move outward along the extrusion groove 13 through the second hydraulic cylinder 22, so that the extrusion head 23 is away from the rubber sealing gasket 61, and then the inner rod of the second hydraulic cylinder 22 is contracted, thereby resetting the first hydraulic cylinder 2, the connecting plate 21, the second hydraulic cylinder 22 and the extrusion head 23, waiting for the next pre-compression test of the rubber sealing gasket 61.

[0027] See also Figure 1 、 Figure 3 、 Figure 4 and Figure 10 The unloading mechanism includes an unloading annular seat 3 arranged near the extrusion side of the extrusion head 23. The side of the extrusion head 23 away from the second hydraulic cylinder 22 is the extrusion side. The outer side of the unloading annular seat 3 is symmetrically fixedly connected with a slide plate 31. The two slide plates 31 are provided with a through hole 32 at one end away from the unloading annular seat 3. A guide connecting rod 33 is inserted through the two through holes 32. The end of the guide connecting rod 33 away from the connecting plate 21 is fixedly sleeved with an anti-slip ring 34, and the other end of the guide connecting rod 33 is sleeved with a buffer spring 35. A cylinder 36 is fixedly connected to the end of the connecting rod 33 close to the connecting plate 21, and the end of the cylinder 36 away from the guide connecting rod 33 is fixedly connected to the side of the connecting plate 21. The two ends of the buffer spring 35 are respectively in contact with the slide 31 and the cylinder 36. The buffer spring 35 applies elastic force to the slide 31. The side of the unloading ring seat 3 is provided with a plurality of mounting holes in a circular array, and an auxiliary pushing mechanism is fixedly installed in each mounting hole. One end of the auxiliary pushing mechanism is in the same vertical plane as the side of the unloading ring seat 3 close to the extrusion head 23.

[0028] The unloading annular seat 3 is clamped with the extrusion groove 13, and the unloading annular seat 3 is movably sleeved on the outside of the circular boss 16. The unloading annular seat 3 can slide back and forth along the extrusion groove 13, the slide plate 31 is slidably connected to the slide groove 14, and the guide connecting rod 33 is slidably connected to the through hole 32.

[0029] Initially, the unloading annular seat 3 is located outside the extrusion groove 13 , and at this time the unloading annular seat 3 is located above the limiting mechanism, and the unloading annular seat 3 abuts against the limiting mechanism.

[0030] When the connecting plate 21 moves forward, the connecting plate 21 drives the guide connecting rod 33 and the buffer spring 35 to move backward through the cylinder 36. At this time, the slide plate 31 is driven to move backward under the cooperation of the guide connecting rod 33 and the buffer spring 35, so that the slide plate 31 is stuck in the slide groove 14. Then, the connecting plate 21 continues to move backward, so that the slide plate 31 slides backward along the slide groove 14, and the unloading annular seat 3 is driven by the slide plate 31 to be stuck in the extrusion groove 13, so that the unloading annular seat 3 is sleeved on the circular boss 16 until the slide plate 31 abuts against the slide groove 14. At this time, one side of the unloading annular seat 3 abuts against the bottom of the extrusion groove 13, so that the unloading annular seat 3 and the slide plate 31 cannot move further backward. At this time, the connecting plate 21 continues to move backward, and the connecting plate 21 drives the extrusion head 23 to continue to move backward through the second hydraulic cylinder 22, so that the cylinder 36 drives the guide connecting rod 33 and the buffer spring 35 to continue to move backward. At this time, the guide connecting rod 33 slides backward along the through hole 32 of the slide plate 31, and the cylinder 36 squeezes the buffer spring 35; when the extrusion side of the extrusion head 23 moves to the side above the limit mechanism, the inner rod of the first hydraulic cylinder 2 stops extending, and the connecting plate 21 stops moving. At this time, there is a certain gap between the extrusion side of the extrusion head 23 and the auxiliary pushing mechanism. This gap is just enough to allow the rubber sealing gasket 61 to be stuck downward, so that the rubber sealing gasket 61 can move downward to the upper end of the limit mechanism.

[0031] When the rubber sealing gasket 61 falls downward to the upper end of the limit mechanism, the inner rod of the second hydraulic cylinder 22 extends to drive the extrusion head 23 to move backward, so that the extrusion head 23 pushes the rubber sealing gasket 61 into the extrusion groove 13, and at the same time, the rubber sealing gasket 61 is sleeved on the circular boss 16. At the same time, the rubber sealing gasket 61 is squeezed with the cooperation of the extrusion head 23 and the unloading annular seat 3, thereby performing a pre-compression test on the rubber sealing gasket 61.

[0032] After the detection is completed, the connecting plate 21 moves forward. At this time, the cylinder 36 drives the guide connecting rod 33 and the buffer spring 35 to move forward. Under the elastic force of the buffer spring 35, the slide plate 31 continues to stay in the slide groove 14 and does not move. When the anti-slip ring 34 at one end of the guide connecting rod 33 contacts the slide plate 31, the guide connecting rod 33 continues to move forward. The guide connecting rod 33 drives the slide plate 31 forward through the anti-slip ring 34, and the slide plate 31 slides forward along the slide groove 14 until it moves out. At the same time, the slide plate 31 drives the unloading annular seat 3 to move forward from the extrusion groove 13. During the movement of the unloading annular seat 3, the rubber sealing gasket 61 is pushed forward, so that the rubber sealing gasket 61 is removed from the extrusion groove 13, and then the extrusion head 23 is separated from the rubber sealing gasket 61, so that the rubber sealing gasket 61 falls downward under the action of its own gravity, thereby completing the unloading of the rubber sealing gasket 61, and the rubber sealing gasket 61 after inspection falls downward into the collection box 17; Through the provision of the unloading annular seat 3, even if the rubber sealing gasket 61 is deformed or damaged and attached to the extrusion groove 13, the unloading annular seat 3 can still push the rubber sealing gasket 61 out from the extrusion groove 13 to complete the unloading of the rubber sealing gasket 61. The unloading process is completed automatically without the need for manual operation by the staff, and it is convenient and fast. The rubber sealing gasket 61 can be directly unloaded, which greatly improves the detection efficiency of the rubber sealing gasket 61.

[0033] See also Figures 3 to 5 、 Figure 10 The auxiliary pushing mechanism includes a sleeve 4 fixedly installed in the mounting hole on the side of the unloading annular seat 3. The end of the sleeve 4 close to the extrusion head 23 is open, and the unopened end of the sleeve 4 is slidably inserted with a light rod 41. One end of the light rod 41 passes through the sleeve 4 and extends into its inner cavity. One end of the light rod 41 in the inner cavity of the sleeve 4 is sleeved with a limiting spring 42, and the end of the light rod 41 in the inner cavity of the sleeve 4 is fixedly connected with a pushing head 43. The two ends of the limiting spring 42 are respectively abutted against the bottom of the inner cavity of the sleeve 4 and the pushing head 43. The limiting spring 42 applies elastic force to the pushing head 43, and the pushing head 43 is stuck in the open end of the sleeve 4. At this time, the outer side of the pushing head 43 and the open end of the sleeve 4 are in the same vertical plane with one side of the unloading annular seat 3, and the end of the light rod 41 away from the pushing head 43 is fixedly sleeved with a positioning ring 44.

[0034] When one side of the unloading annular seat 3 contacts the bottom of the extrusion groove 13, the push head 43 moves out from the sleeve 4 under the elastic force of the limit spring 42 without external pushing or squeezing. At this time, the push head 43 drives the polished rod 41 to slide forward along the sleeve 4 until the positioning ring 44 at one end of the polished rod 41 abuts against one end of the sleeve 4. At this time, the push head 43 cannot move forward any further. At this time, the push head 43 is on one side above the limit mechanism, and then the extrusion side of the extrusion head 23 is moved to the other side above the limit mechanism, so that the push head 43 and the extrusion head 23 are symmetrically distributed front to back; When the rubber sealing gasket 61 falls downward along the inner cavity of the feed pipe 6, the rubber sealing gasket 61 falls downward along the gap between the push head 43 and the extrusion head 23 to the upper end of the limiting mechanism, so that the rubber sealing gasket 61 is aligned with the extrusion groove 13 and the circular boss 16, and the rubber sealing gasket 61, the extrusion groove 13, and the circular boss 16 are on the same axis.

[0035] See also Figures 6 to 8The limiting mechanism includes a fan-shaped seat 5 fixedly mounted on the lower end of one side of the pre-pressing detection mold 12. The fan-shaped seat 5 is symmetrically provided with a contraction groove 51 on one side close to the pre-pressing detection mold 12. The two contraction grooves 51 are symmetrically distributed in an eight-shaped shape. Fan-shaped limit blocks 52 are slidably installed in the two contraction grooves 51. The two fan-shaped limit blocks 52 are both part of an annular plate. The two fan-shaped limit blocks 52 are coaxial with the extrusion groove 13, and the inner diameter of the fan-shaped limit blocks 52 is smaller than the inner diameter of the extrusion groove 13. The front and rear ends of the inner sides of the two fan-shaped limit blocks 52 are provided with extrusion grooves. The inclined surface 53, the outer sides of the two fan-shaped limit blocks 52 are symmetrically fixedly connected with guide plates 54, the lower ends of the guide plates 54 extend through the contraction groove 51 to the outside and are fixedly connected with anti-slip plates 55, the guide plates 54 are slidably connected to the fan-shaped seat 5, and the anti-slip plates 55 are provided to prevent the guide plates 54 and the fan-shaped limit blocks 52 from sliding out of the contraction groove 51, and a reset spring piece 56 is installed on the outer side of the fan-shaped limit block 52 between the two guide plates 54, and one side of the reset spring piece 56 abuts against the bottom of the contraction groove 51, and the reset spring piece 56 applies elastic force to the fan-shaped limit block 52.

[0036] When the rubber sealing gasket 61 falls downward along the gap between the push head 43 and the extrusion head 23 to the upper end of the limiting mechanism, the rubber sealing gasket 61 is at the upper end of the two fan-shaped limiting blocks 52. The rubber sealing gasket 61 is limited by the two fan-shaped limiting blocks 52, multiple push heads 43 and the extrusion head 23, so that the rubber sealing gasket 61 is aligned with the extrusion groove 13 and the circular boss 16.

[0037] In the initial position, the unloading annular seat 3 is at the upper end of the limiting mechanism. At this time, the unloading annular seat 3 is at the upper end of the sector-shaped limiting block 52 , pressing the sector-shaped limiting block 52 downward into the contraction groove 51 .

[0038] See also Figure 6 and Figure 9 The left and right lower ends of the feed pipe 6 are symmetrically penetrated with rectangular grooves 62. The locking mechanism includes a concave plate 7 fixedly mounted on the lower end of the side of the feed pipe 6. The concave plate 7 is on the outside of the rectangular groove 62. A concave transmission block 71 is provided on the side of the concave plate 7 away from the feed pipe 6. The concave transmission block 71 is fixedly connected to a slide bar 72 on the side close to the concave plate 7. One end of the slide bar 72 passes through the side of the concave plate 7 and extends to its inner side. The slide bar 72 is slidably connected to the concave plate 7. A locking spring 73 is sleeved on the slide bar 72. The end of the slide bar 72 away from the concave transmission block 71 is fixedly connected to a locking block 74. The two ends of the locking spring 73 respectively abut the concave plate 7 and the locking block 74, and the locking spring 73 applies elastic force to the locking block 74.

[0039] One side of the locking block 74 extends through the rectangular groove 62 to the inner cavity of the feed pipe 6, and the locking block 74 is located on one side of the inner cavity of the feed pipe 6 and contacts the side of the rubber sealing gasket 61. The side of the locking block 74 that contacts the rubber sealing gasket 61 is set as a curved surface, and the curved surface of the locking block 74 fits with the side of the rubber sealing gasket 61.

[0040] The rubber sealing gasket 61 is supported by two locking blocks 74 so that the rubber sealing gasket 61 can be stably located in the inner cavity of the feed pipe 6. At the same time, the lower end of the rubber sealing gasket 61 in the inner cavity of the feed pipe 6 is above the end of the extrusion groove 13, which will not affect the extruded rubber sealing gasket 61 from moving outward along the extrusion groove 13.

[0041] See also Figure 1 、 Figure 2 and Figure 10 The unlocking mechanism is fixedly mounted on the upper end of the connecting plate 21. The unlocking mechanism includes an L-shaped frame 8 fixedly mounted on the upper end of the connecting plate 21. An isosceles trapezoidal block 81 is fixedly connected to one end of the L-shaped frame 8 away from the connecting plate 21. The isosceles trapezoidal block 81 is arranged on the side relatively far away from the two L-shaped frames 8, and the shorter side of the isosceles trapezoidal block 81 is the side away from the L-shaped frame 8.

[0042] When the connecting plate 21 moves backward, the connecting plate 21 drives the L-shaped frame 8 to move backward synchronously. When one end of the L-shaped frame 8 moves to the inner side of the concave transmission block 71, the connecting plate 21 drives the L-shaped frame 8 to continue to move backward. At this time, the L-shaped frame 8 drives the inclined surface of the isosceles trapezoidal block 81 to squeeze and contact the concave transmission block 71. At this time, the inclined surface of the isosceles trapezoidal block 81 slides along the side of the concave transmission block 71. At the same time, the isosceles trapezoidal block 81 pushes the concave transmission block 71 to move away from the concave plate 7. The concave transmission block 71 pulls the locking block 74 outward from the inner cavity of the feed pipe 6 through the sliding rod 72. At this time, the locking block 74 slides outward along the rectangular groove 62, so that the two locking blocks 74 move away from each other. When the curved side of the two locking blocks 74 moves into the rectangular groove 62, the two locking blocks 74 release the lock on the rubber sealing gasket 61. At this time, the inner rod of the first hydraulic cylinder 2 stops extending, the connecting plate 21 stops moving, and the push head 43 is on one side above the limit mechanism, and the extrusion side of the extrusion head 23 is on the other side above the limit mechanism. The rubber sealing gasket 61 falls downward along the inner cavity of the feed pipe 6 to the upper end of the limit mechanism under the action of its own gravity.

[0043] Working principle: During operation, the rubber sealing gasket 61 is loaded downward along the upper end of the inner cavity of the feed pipe 6, so that multiple rubber sealing gaskets 61 are arranged in sequence from top to bottom in the inner cavity of the feed pipe 6. When the rubber sealing gasket 61 in the inner cavity of the feed pipe 6 is missing, it continues to be loaded, and so on. When the rubber sealing gasket 61 moves downward to the bottom of the inner cavity of the feed pipe 6, the rubber sealing gasket 61 is supported and limited by the two locking blocks 74.

[0044] During the inspection, the inner rod of the first hydraulic cylinder 2 is extended to make the connecting plate 21 drive the second hydraulic cylinder 22 to move backward, and the second hydraulic cylinder 22 drives the extrusion head 23 to move backward. When the connecting plate 21 moves backward, it drives the unloading mechanism to move backward synchronously until the slide plate 31 abuts against the slide groove 14. At this time, the unloading annular seat 3 is sleeved on the circular boss 16, and the rear side of the unloading annular seat 3 abuts against the bottom of the extrusion groove 13, so that the unloading annular seat 3 and the slide plate 31 cannot move further backward. At this time, the connecting plate 21 continues to move backward, and the connecting plate 21 drives the extrusion head 23 to continue to move backward through the second hydraulic cylinder 22, so that the cylinder 36 drives the guide connecting rod 33 and the buffer spring 35 to continue to move backward. At this time, the guide connecting rod 33 slides backward along the through hole 32 of the slide plate 31, and at the same time, the cylinder 36 squeezes the buffer spring 35. When the extrusion side of the extrusion head 23 moves to the side above the limit mechanism, the inner rod of the first hydraulic cylinder 2 stops extending and the connecting plate 21 stops moving; the push head 43 is not subjected to extrusion force or thrust at this time, and the push head 43 is located on the outside of the sleeve 4 under the elastic force of the limit spring 42. At this time, there is a certain gap between the extrusion side of the extrusion head 23 and the push head 43, and this gap is just enough to allow the rubber sealing gasket 61 to be stuck downward.

[0045] When the connecting plate 21 moves backward, it drives the two L-shaped frames 8 to move backward synchronously. The L-shaped frame 8 drives the inclined surface of the isosceles trapezoidal block 81 to squeeze and contact the concave transmission block 71. At this time, the isosceles trapezoidal block 81 pushes the concave transmission block 71 to move away from the concave plate 7. The concave transmission block 71 pulls the locking block 74 from the inner cavity of the feed pipe 6 through the slide rod 72 to move outward. At this time, the locking block 74 slides outward along the rectangular groove 62, so that the two locking blocks 74 move away from each other, so that the two locking blocks 74 release the lock on the rubber sealing gasket 61. At this time, the rubber sealing gasket 61 falls downward along the inner cavity of the feed pipe 6 to the upper end of the limit mechanism under the action of its own gravity, so that the rubber sealing gasket 61 is at the upper end of the two fan-shaped limit blocks 52.

[0046] At this time, one rubber sealing gasket 61 falls downward along the feed pipe 6, while the rest of the rubber sealing gaskets 61 are still in the inner cavity of the feed pipe 6. When the rubber sealing gasket 61 moves into the extrusion groove 13, the extrusion head 23 moves to the bottom of the feed pipe 6, thereby preventing the rest of the rubber sealing gaskets 61 from continuing to fall downward.

[0047] Then, the inner rod of the second hydraulic cylinder 22 is extended to make the extrusion head 23 continue to move backward, so that the extrusion head 23 pushes the rubber sealing gasket 61 to move into the extrusion groove 13, so that the rubber sealing gasket 61 is removed from the upper end of the sector-shaped limit block 52, and at the same time, the rubber sealing gasket 61 is sleeved on the circular boss 16; in this process, when the rubber sealing gasket 61 moves backward, it pushes the push head 43 to move backward, and the push head 43 drives the light rod 41 to slide along the sleeve 4. At this time, the push head 43 squeezes the limit spring 42, and under the action of the elastic force of the limit spring 42, the push head 43 maintains the tendency to move forward, and under the cooperation of the push head 43 and the extrusion head 23, the rubber sealing gasket 61 is firmly clamped and positioned, so that the rubber sealing gasket 61 can stably move backward into the extrusion groove 13; When the push head 43 is inserted into the sleeve 4, one side of the rubber sealing gasket 61 contacts the front side of the unloading annular seat 3. At this time, the extrusion head 23 continues to move backward, and the unloading annular seat 3 cannot move backward. The rubber sealing gasket 61 is squeezed with the cooperation of the extrusion head 23 and the unloading annular seat 3, thereby performing a pre-compression test on the rubber sealing gasket 61.

[0048] After the test is completed, the inner rod of the first hydraulic cylinder 2 is retracted to cause the connecting plate 21 to drive the second hydraulic cylinder 22 to move forward. The connecting plate 21 drives the extrusion head 23 to move outward along the extrusion groove 13 through the second hydraulic cylinder 22, so that the extrusion head 23 is away from the rubber sealing gasket 61. When the connecting plate 21 moves forward, it drives the unlocking mechanism forward, so that the isosceles trapezoidal block 81 in the unlocking mechanism is separated from the concave transmission block 71. At this time, under the action of the elastic force of the locking spring 73, the locking block 74 is pushed to slide along the rectangular groove 62 toward the inner cavity of the feed pipe 6, so that the two locking blocks 74 move closer to each other. At this time, the curved surface of the locking block 74 contacts the side of the rubber sealing gasket 61, and the rubber sealing gasket 61 is supported and limited by the cooperation of the two locking blocks 74; if the position of the rubber sealing gasket 61 is lower at this time, the locking blocks 74 will push the rubber sealing gasket 61 upward for a distance during the process of approaching each other, so that the rubber sealing gasket 61 is above the extrusion groove 13, which will not affect the extruded rubber sealing gasket 61 from moving outward along the extrusion groove 13 to discharge the material.

[0049] When the connecting plate 21 moves forward, the cylinder 36 drives the guide connecting rod 33 and the buffer spring 35 to move forward. Under the elastic force of the buffer spring 35, the slide plate 31 continues to stay in the slide groove 14 and does not move. When the anti-slip ring 34 at one end of the guide connecting rod 33 contacts the slide plate 31, the guide connecting rod 33 drives the slide plate 31 to move forward through the anti-slip ring 34, and the slide plate 31 drives the unloading annular seat 3 to move forward out of the extrusion groove 13. During the movement of the unloading annular seat 3, the rubber sealing gasket 61 is pushed forward until the unloading annular seat 3 moves to the top of the sector limit block 52. At this time, the front side of the unloading annular seat 3 moves over the sector seat 5, so that the front side of the unloading annular seat 3 is closer to the front. At the same time, the unloading annular seat 3 is not separated from the sector limit block 52, so that the rubber sealing gasket 61 is moved out of the extrusion groove 13, and then the inner rod of the second hydraulic cylinder 22 is contracted to separate the extrusion head 23 from the rubber sealing gasket 61. The rubber sealing gasket 61 falls downward under the action of its own gravity, thereby completing the unloading of the rubber sealing gasket 61, and making the rubber sealing gasket 61 that has been tested fall downward into the collection box 17, thereby completing the pre-compression test of the rubber sealing gasket 61.

[0050] Through the provision of the unloading annular seat 3, even if the rubber sealing gasket 61 is deformed or damaged and attached to the extrusion groove 13, the unloading annular seat 3 can still push the rubber sealing gasket 61 out from the extrusion groove 13 to complete the unloading of the rubber sealing gasket 61. The unloading process is completed automatically without the need for manual operation by the staff, and it is convenient and fast. The rubber sealing gasket 61 can be directly unloaded, which greatly improves the detection efficiency of the rubber sealing gasket 61.

[0051] During the pre-compression test of the rubber sealing gasket 61 , the rubber sealing gasket 61 can be automatically loaded and unloaded, which not only reduces the burden on the staff but also improves the test efficiency.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sealing gasket production pre-pressing device, comprising an L-shaped base (1), characterized in that: One end of the inner bottom of the L-shaped base (1) is fixedly connected to a support plate (11), the upper end of the support plate (11) is fixedly connected to a pre-pressing detection mold (12), a circular extrusion groove (13) is provided on one side of the side plate of the L-shaped base (1), the inner wall of the extrusion groove (13) is symmetrically provided with a slide groove (14), the bottom of the extrusion groove (13) is provided with a plurality of through holes (15) in a circular array, a circular boss (16) is fixedly connected at the center of the bottom of the extrusion groove (13), a collecting box (17) is provided at the bottom of the L-shaped base (1) below the pre-pressing detection mold (12), a feed pipe (6) is fixedly installed on the upper end of the side of the pre-pressing detection mold (12) on which the extrusion groove (13) is provided, and the inner cavity of the feed pipe (6) is sequentially provided with rubber sealing gaskets (61) from top to bottom; An extrusion mechanism is fixedly mounted on the side plate of the L-shaped base (1), and a discharge mechanism for pushing the rubber sealing gasket (61) out of the extrusion groove (13) is mounted on the extrusion mechanism. A limiting mechanism for supporting the rubber sealing gasket (61) is fixedly mounted on the lower end of the pre-pressing detection mold (12) on the side where the extrusion groove (13) is opened. Locking mechanisms are symmetrically mounted on the lower ends of the left and right sides of the feed pipe (6), and an unlocking mechanism is symmetrically mounted on the upper end of the extrusion mechanism.

2. A sealing gasket production pre-pressing device according to claim 1, characterized in that: The extrusion mechanism comprises a first hydraulic oil cylinder (2) fixedly mounted on the outer side of a side plate of an L-shaped base (1); one end of an inner rod of the first hydraulic oil cylinder (2) passes through the side plate of the L-shaped base (1) and is fixedly mounted with a connecting plate (21); a second hydraulic oil cylinder (22) is fixedly mounted on the same side of the connecting plate (21) as the first hydraulic oil cylinder (2); one end of an inner rod of the second hydraulic oil cylinder (22) passes through the connecting plate (21) and is fixedly mounted with an extrusion head (23).

3. The sealing gasket production pre-pressing device according to claim 2, characterized in that: The unloading mechanism includes an unloading annular seat (3) arranged near the extrusion side of the extrusion head (23), the outer side surface of the unloading annular seat (3) is symmetrically fixedly connected with a slide plate (31), the ends of the two slide plates (31) away from the unloading annular seat (3) are provided with a through hole (32), and the two through holes (32) are both inserted with a guide connecting rod (33), the end of the guide connecting rod (33) away from the connecting plate (21) is fixedly sleeved with an anti-slip ring (34), the other end of the guide connecting rod (33) is sleeved with a buffer spring (35), the end of the guide connecting rod (33) close to the connecting plate (21) is fixedly connected with a cylinder (36), the end of the cylinder (36) away from the guide connecting rod (33) is fixedly connected to the side surface of the connecting plate (21), the two ends of the buffer spring (35) are respectively in contact with the slide plate (31) and the cylinder (36), and the side surface of the unloading annular seat (3) is provided with a plurality of mounting holes in an annular array, and an auxiliary pushing mechanism is fixedly installed in each mounting hole.

4. A sealing gasket production pre-pressing device according to claim 3, characterized in that: The unloading annular seat (3) is engaged with the extrusion groove (13), and the unloading annular seat (3) is movably sleeved on the outside of the circular boss (16). The slide plate (31) is slidably connected to the slide groove (14) in a front-back direction, and the guide connecting rod (33) is slidably connected to the through hole (32).

5. The sealing gasket production pre-pressing device according to claim 3, characterized in that: The auxiliary pushing mechanism includes a sleeve (4) fixedly mounted in a mounting hole on the side of the unloading annular seat (3), the end of the sleeve (4) close to the extrusion head (23) is open, and the unopened end of the sleeve (4) is slidably connected with a light rod (41), one end of the light rod (41) passes through the sleeve (4) and extends to its inner cavity, the end of the light rod (41) in the inner cavity of the sleeve (4) is sleeved with a limit spring (42), and the end of the light rod (41) in the inner cavity of the sleeve (4) is fixedly connected with a push head (43), the two ends of the limit spring (42) are respectively in contact with the bottom of the inner cavity of the sleeve (4) and the push head (43), the push head (43) is stuck in the open end of the sleeve (4), and the end of the light rod (41) away from the push head (43) is fixedly sleeved with a positioning ring (44).

6. The sealing gasket production pre-pressing device according to claim 1, characterized in that: The limiting mechanism comprises a fan-shaped seat (5) fixedly mounted on the lower end of one side of the pre-pressing detection mold (12); a shrinkage groove (51) is symmetrically provided on the fan-shaped seat (5) near the side of the pre-pressing detection mold (12); the two shrinkage grooves (51) are symmetrically distributed in an eight-shaped shape; a fan-shaped limiting block (52) is slidably mounted in the two shrinkage grooves (51); an extrusion inclined surface (53) is provided at the front and rear ends of the inner sides of the two fan-shaped limiting blocks (52); a guide plate (54) is symmetrically fixedly connected to the outer sides of the two fan-shaped limiting blocks (52); the lower end of the guide plate (54) passes through the shrinkage groove (51) and extends to the outside and is fixedly connected to an anti-slip plate (55); a reset spring (56) is installed on the outer side of the fan-shaped limiting block (52) between the two guide plates (54); one side of the reset spring (56) abuts against the bottom of the shrinkage groove (51).

7. The sealing gasket production pre-pressing device according to claim 1, characterized in that: The lower ends of the left and right sides of the feed pipe (6) are symmetrically penetrated with rectangular grooves (62), and the locking mechanism includes a concave plate (7) fixedly mounted on the lower end of the side of the feed pipe (6), the concave plate (7) is located outside the rectangular groove (62), and a concave transmission block (71) is provided on the side of the concave plate (7) away from the feed pipe (6), and a sliding rod (72) is fixedly connected to the side of the concave transmission block (71) close to the concave plate (7), one end of the sliding rod (72) passes through the side of the concave plate (7) and extends to the inner side thereof, and a locking spring (73) is sleeved on the sliding rod (72), and one end of the sliding rod (72) away from the concave transmission block (71) is fixedly connected to a locking block (74), and the two ends of the locking spring (73) are respectively in contact with the concave plate (7) and the locking block (74).

8. The sealing gasket production pre-pressing device according to claim 7, characterized in that: One side of the locking block (74) passes through the rectangular groove (62) and extends to the inner cavity of the feed pipe (6), and the locking block (74) is located on one side of the inner cavity of the feed pipe (6) and contacts the side of the rubber sealing gasket (61), and the side of the locking block (74) in contact with the rubber sealing gasket (61) is set as a curved surface.

9. The sealing gasket production pre-pressing device according to claim 2, characterized in that: The unlocking mechanism is fixedly mounted on the upper end of the connecting plate (21), and comprises an L-shaped frame (8) fixedly mounted on the upper end of the connecting plate (21). An isosceles trapezoidal block (81) is fixedly connected to one end of the L-shaped frame (8) away from the connecting plate (21), and the isosceles trapezoidal block (81) is arranged on a side relatively away from the two L-shaped frames (8).

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