Pre-punching-free inner core airtight test structure for products with center-hole diaphragm

Abstract

The present application relates to the technical field of diaphragm air tightness testing tools, in particular to a diaphragm product with a center hole air tightness testing structure without pre-penetrating an inner core, which comprises an upper mounting plate and an upper jig plate fixedly installed on the bottom surface of the upper mounting plate, a pressing assembly is arranged in the mounting hole, the pressing assembly comprises an upper positioning core shell installed in the mounting hole, a sliding seat is slidably connected in the upper positioning core shell, an upper positioning core is installed on the bottom surface of the sliding seat, a spring is arranged on the top surface of the sliding seat, a lower movable mold plate is arranged below the upper jig plate, a plurality of placed punch molds are fixedly installed on the upper surface of the lower movable mold plate, an inner hole is arranged in the placed punch mold, an air passage assembly comprises a lower positioning core shell arranged in the inner hole, a lower positioning core needle head is fixedly installed on the top surface of the lower positioning core shell, and an air inlet hole is arranged in the lower positioning core shell. The present application is convenient to operate, saves the process of manually placing the diaphragm on the inner core, and is beneficial to improving the testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of diaphragm airtightness testing tools, and more specifically, to an airtightness testing structure for diaphragm products with a central hole that eliminates the need for pre-penetration of the inner core. Background Technology

[0002] Before diaphragm products are put into use, the airtightness of the diaphragm will affect its performance. In order to eliminate diaphragms with poor airtightness, it is generally necessary to conduct an airtightness test on the diaphragm in advance. When conducting the airtightness test, a corresponding airtightness test structure is generally required.

[0003] The invention patent with authorization announcement number CN208109354U discloses a diaphragm airtightness testing device and a rapid evaluation system for diaphragm airtightness. The diaphragm airtightness testing device includes a first cover plate with a first slot and a second cover plate with a second slot. The first slot and the second slot are aligned to form a sealed air chamber, and the diaphragm is pressed into the sealed air chamber. One end of the sealed air chamber is connected to an air source, and the other end is connected to an exhaust indicator. The airtightness of the diaphragm is tested through the second slot, the sealed air chamber formed by the alignment of the first slot, and the exhaust indicator.

[0004] While this technical solution offers the advantage of accurate and rapid airtightness testing, its practical application suffers from drawbacks. Because the diaphragm with a central hole has a through-hole in its center, traditional airtightness testing of such products requires pre-inserting the diaphragm into an inner core to seal the central hole. The sealed diaphragm is then placed on a corresponding external mold for testing. This process, where operators must first insert the inner core into each diaphragm before proceeding with the test, is time-consuming, leading to prolonged operation time, low productivity, and hindering efficiency. Therefore, we propose an airtightness testing structure for diaphragm products with a central hole that eliminates the need for pre-insertion of the inner core. Summary of the Invention

[0005] The purpose of this invention is to provide a core-tightness testing structure for diaphragm products with a central hole that eliminates the need for pre-penetration, thereby addressing the deficiencies mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pre-penetration core-free airtightness test structure for diaphragm products with a central hole includes an upper mounting plate and an upper fixture plate fixedly mounted on the bottom surface of the upper mounting plate. The upper mounting plate and the upper fixture plate are provided with multiple mounting holes communicating with the outside. A clamping assembly is provided in the mounting holes. The clamping assembly includes an upper positioning core housing fixedly mounted in the mounting holes. A slide block is slidably connected in the upper positioning core housing. An upper positioning core is fixedly mounted on the bottom surface of the slide block. A spring is provided on the top surface of the slide block.

[0008] A lower moving template is provided below the upper fixture plate. Multiple placement punches arranged in a matrix are fixedly installed on the upper surface of the lower moving template. An internal hole is provided in the placement punch, and a venting component is provided in the internal hole. The venting component includes a lower positioning core housing disposed in the internal hole. A lower positioning core needle is fixedly installed on the top surface of the lower positioning core housing, which protrudes from the top plate of the placement punch. An air inlet is provided in the lower positioning core housing, which communicates with the lower positioning core needle.

[0009] As a preferred embodiment of the present invention, the lower positioning core needle is in the shape of a hollow cylinder, which is used to discharge gas outward along the lower positioning core needle for airtightness testing.

[0010] As a preferred embodiment of the present invention, the bottom end of the spring is fixedly installed on the top surface of the slide block, and the top end of the spring is fixedly installed on the external frame, so that the spring force can be used to drive the upper positioning core to be stably inserted into the center hole of the diaphragm.

[0011] As a preferred embodiment of the present invention, both the upper mounting plate and the upper fixture plate are provided with guide holes that communicate with the outside. A guide post is fixedly installed on the lower moving template at a position opposite to the guide hole. The guide post is located inside the guide hole and is slidably connected to the guide hole, so as to facilitate the guiding and positioning operation of the movement of the lower moving template by using the sliding connection between the guide post and the guide hole.

[0012] As a preferred embodiment of the present invention, the upper positioning core housing is provided with a sliding hole that communicates with the outside. The slide block and the upper positioning core are both located in the sliding hole and are slidably connected to the sliding hole, so that the slide block and the upper positioning core can slide up and down within a certain range.

[0013] As a preferred embodiment of the present invention, an air inlet connector for venting air into the air inlet is fixedly installed on the bottom wall of the built-in hole, which facilitates connecting the air inlet connector to an external air source for gas delivery.

[0014] As a preferred embodiment of the present invention, a slip ring is fixedly installed on the bottom cylinder of the lower positioning core housing. The slip ring is fixedly installed on the inner wall of the internal hole. By setting the slip ring, the internal hole is blocked, so that the gas entering the internal hole can only be discharged outward along the lower positioning core needle.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention, through the design of multiple ventilation components and multiple clamping components, ensures that multiple diaphragms can be placed simultaneously on corresponding placement punches during use. The upward movement of the lower moving template then drives the diaphragms upward. After the diaphragms move upward, the corresponding upper positioning core automatically inserts into the center hole of the diaphragm. Gas then enters between the diaphragm and the placement punch through the air inlet and the lower positioning core needle. This facilitates simultaneous airtightness testing of multiple diaphragms, making it convenient to use. It solves the problem of traditional airtightness testing of diaphragms with center holes, which requires pre-inserting the diaphragm with the center hole onto an inner core, sealing the center hole, and then placing the sealed diaphragm on the corresponding placement punch for testing. This process, where operators first insert the inner core into each diaphragm before subsequent testing, is time-consuming, resulting in long operating hours, low productivity, and hindering work efficiency.

[0017] 2. The present invention uses a spring. After the upper positioning core is inserted into the center hole of the diaphragm, the spring is compressed, making the insertion of the upper positioning core into the center hole of the diaphragm more stable and preventing the upper positioning core from falling out of the center hole, thus facilitating use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a partial structural schematic diagram of the present invention;

[0020] Figure 3 This is an exploded structural diagram of the clamping assembly of the present invention;

[0021] Figure 4 This is a schematic diagram of the ventilation component of the present invention.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Upper mounting plate; 10. Upper jig plate; 11. Guide hole; 12. Mounting hole;

[0024] 2. Clamping assembly; 20. Upper positioning core housing; 201. Sliding hole; 21. Spring; 22. Slide block; 23. Upper positioning core;

[0025] 3. Lower moving template; 30. Guide post; 31. Placement of punch; 32. Internal hole; 33. Air inlet connector;

[0026] 4. Ventilation assembly; 40. Slip ring; 41. Lower positioning core housing; 42. Air inlet; 43. Lower positioning core needle. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-4 This invention provides a technical solution: a pre-penetration core airtightness test structure for diaphragm products with a central hole, comprising an upper mounting plate 1 and an upper fixture plate 10 fixedly mounted on the bottom surface of the upper mounting plate 1. The upper mounting plate 1 and the upper fixture plate 10 are provided with multiple mounting holes 12 communicating with the outside. A pressing component 2 is provided in the mounting holes 12. The pressing component 2 includes an upper positioning core housing 20 fixedly mounted on the wall of the mounting hole 12. A slide block 22 is slidably connected in the upper positioning core housing 20. An upper positioning core 23 is fixedly mounted on the bottom surface of the slide block 22. A spring 21 is provided on the top surface of the slide block 22. The bottom end of the spring 21 is fixedly mounted on the top surface of the slide block 22, and the top end of the spring 21 is fixedly mounted on the external frame. This facilitates the downward pressing of the slide block 22 by the elastic force of the spring 21, which drives the upper positioning core 23 to be stably inserted into the central hole of the diaphragm, making it less likely for the upper positioning core 23 to fall off the diaphragm.

[0029] Specifically, a lower moving template 3 is provided below the upper fixture plate 10. Multiple placement punches 31 arranged in a matrix are fixedly installed on the upper surface of the lower moving template 3. The size of the placement punches 31 is adapted to the size of the diaphragm, so that the diaphragm can be stably placed on the placement punches 31. An internal hole 32 is provided in the placement punches 31. A venting component 4 is provided in the internal hole 32. The venting component 4 includes a lower positioning core housing 41 provided in the internal hole 32. A lower positioning core needle 43 that protrudes from the top plate of the placement punches 31 is fixedly installed on the top surface of the lower positioning core housing 41. An air inlet hole 42 that communicates with the lower positioning core needle 43 is provided in the lower positioning core housing 41. When the diaphragm is placed on the placement punches 31, the lower positioning core needle 43 is exactly between the placement punches 31 and the diaphragm, which facilitates the use of gas in the lower positioning core needle 43 to enter between the placement punches 31 and the diaphragm for airtightness testing.

[0030] In this embodiment, the lower positioning core needle 43 is a hollow cylinder, which is used to discharge gas outward along the lower positioning core needle 43 and enter between the placement punch 31 and the diaphragm for airtightness testing.

[0031] Specifically, both the upper mounting plate 1 and the upper fixture plate 10 are provided with guide holes 11 that communicate with the outside. A guide post 30 is fixedly installed on the lower moving template 3 at a position directly opposite the guide hole 11. The guide post 30 is located inside the guide hole 11 and is slidably connected to the guide hole 11, so that the movement of the lower moving template 3 can be guided and positioned by using the sliding connection between the guide post 30 and the guide hole 11.

[0032] Furthermore, the upper positioning core housing 20 is provided with a sliding hole 201 that communicates with the outside. The slide block 22 and the upper positioning core 23 are both located in the sliding hole 201 and are slidably connected to the sliding hole 201, so that the slide block 22 and the upper positioning core 23 can slide up and down within a certain range.

[0033] In addition, an air inlet connector 33 for venting air into the air inlet 42 is fixedly installed on the bottom wall of the built-in hole 32, which facilitates connecting the air inlet connector 33 to an external air source for gas delivery.

[0034] It is worth noting that a slip ring 40 is fixedly installed on the bottom cylinder of the lower positioning core housing 41. The slip ring 40 is fixedly installed on the inner wall of the internal hole 32. The slip ring 40 is used to block the internal hole 32, so that the gas entering the internal hole 32 can only be discharged outward along the lower positioning core needle 43.

[0035] In the airtightness testing structure for diaphragm products with a central hole of the present invention, the diaphragm is correctly placed on the upper surface of the placement punch 31. As the lower moving template 3 moves upward, it drives the placement punch 31 and the diaphragm on the placement punch 31 to move upward. As the diaphragm moves upward, the upper positioning core 23 is inserted into the through hole in the diaphragm, thus sealing the central hole of the diaphragm. At the same time, the upper fixture plate 10 can also press appropriately on the upper surface of the diaphragm. After air is introduced into the air inlet connector 33, the gas in the air inlet connector 33 can enter between the diaphragm and the placement punch 31 through the air inlet hole 42 and the lower positioning core needle 43, realizing the airtightness test of the diaphragm. In this process, multiple diaphragms can be tested simultaneously. In addition, as the lower moving template 3 moves, the upper positioning core 23 can be automatically inserted into the through hole in the diaphragm, eliminating the need for manual insertion of the diaphragm with the central hole into the inner core, which helps to improve testing efficiency.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A core-tightness testing structure for diaphragm products with a central hole, characterized in that: The device includes an upper mounting plate (1) and an upper fixture plate (10) fixedly mounted on the bottom surface of the upper mounting plate (1). The upper mounting plate (1) and the upper fixture plate (10) are provided with a plurality of mounting holes (12) that communicate with the outside. A clamping assembly (2) is provided in the mounting holes (12). The clamping assembly (2) includes an upper positioning core housing (20) fixedly mounted in the mounting holes (12). A slide (22) is slidably connected in the upper positioning core housing (20). An upper positioning core (23) is fixedly mounted on the bottom surface of the slide (22). A spring (21) is provided on the top surface of the slide (22). A lower moving template (3) is provided below the upper jig plate (10). Multiple placement punches (31) arranged in a matrix are fixedly installed on the upper surface of the lower moving template (3). An internal hole (32) is provided in the placement punch (31). A ventilation component (4) is provided in the internal hole (32). The ventilation component (4) includes a lower positioning core housing (41) provided in the internal hole (32). A lower positioning core needle (43) that protrudes from the top plate of the placement punch (31) is fixedly installed on the top surface of the lower positioning core housing (41). An air inlet (42) that communicates with the lower positioning core needle (43) is provided in the lower positioning core housing (41). The upper positioning core housing (20) is provided with a sliding hole (201) that communicates with the outside. The slide block (22) and the upper positioning core (23) are both located in the sliding hole (201) and are slidably connected to the sliding hole (201). An air inlet connector (33) for venting air into the air inlet (42) is fixedly installed on the bottom hole wall of the built-in hole (32). A slip ring (40) is fixedly installed on the bottom cylinder of the lower positioning core housing (41), and the slip ring (40) is fixedly installed on the inner wall of the built-in hole (32).

2. The airtightness test structure for diaphragm products with a central hole without pre-penetration of the inner core as described in claim 1, characterized in that: The lower positioning core needle (43) is a hollow cylinder, used for gas to be discharged outward along the lower positioning core needle (43) for air tightness testing.

3. The airtightness test structure for diaphragm products with a central hole without pre-penetration of the inner core as described in claim 1, characterized in that: The bottom end of the spring (21) is fixedly installed on the top surface of the slide (22), and the top end of the spring (21) is fixedly installed on the external frame.

4. The airtightness test structure for diaphragm products with a central hole without pre-penetration of the inner core as described in claim 1, characterized in that: Both the upper mounting plate (1) and the upper fixture plate (10) are provided with guide holes (11) that communicate with the outside. A guide post (30) is fixedly installed on the lower moving template (3) at a position opposite to the guide hole (11). The guide post (30) is located inside the guide hole (11) and is slidably connected to the guide hole (11).

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