Injection mold sealing performance testing device

Abstract

The invention belongs to the related technical field of airtightness testing, and particularly discloses an injection mold airtightness testing device which comprises an airtightness testing table, an airtightness testing seat and a testing mold, the airtightness testing seat and the testing mold are fixedly installed on the upper portion of the inner side of the airtightness testing table, and the two sides of the airtightness testing table are each provided with a guide lifting assembly. A guide frame is arranged on the outer side of the guide lifting assembly, an inclined frame is fixedly connected to the outer side of the guide frame, a sliding way is formed in the inclined frame, one end in the sliding way is connected with a sliding block through an arranged abutting piece mechanism, the sliding block slides in the sliding way, and fixing plates are symmetrically installed on the outer surface of the sliding block. A clamping shaft is jointly inserted between the two fixing plates in a penetrating mode, a connecting rod is connected to the lower portion of the outer side of the clamping shaft through an arranged rotating limiting piece, a testing mold with an inclined air hole can be positioned, and therefore air tightness testing can be conducted in a matched mode.

Description

Technical Field

[0001] The invention belongs to the technical field related to airtight testing, and specifically discloses a sealing testing device for an injection mold. Background Art

[0002] The air tightness test is to detect whether the plastic parts can effectively prevent the penetration of gas to ensure their safety and reliability in a specific environment; Pressure method: This is the most commonly used method. It applies a certain pressure inside the plastic part and then observes the pressure change to judge the airtightness of the plastic part. If the pressure does not drop significantly within the specified time, it can be considered that the plastic part has good airtightness.

[0003] Gas permeation method: This method is to fill a certain amount of gas inside the plastic part, and then observe the gas permeation within a certain period of time to judge the airtightness of the plastic part. If the gas permeation is very small within the specified time, then it can be considered that the plastic part has good airtightness.

[0004] Ultrasonic method: This method is to transmit ultrasonic waves into the plastic part, then receive the reflected ultrasonic waves, and analyze the propagation of ultrasonic waves to judge the air tightness of the plastic part. If the propagation of ultrasonic waves is good, then it can be considered that the plastic part has good air tightness; When performing air tightness testing on covered injection molded parts, it is necessary to penetrate through the corresponding pores and then inject pressure to test the air tightness of the injection molded parts. However, the traditional sealing test device and its equipment structure are relatively complex, and cannot perform sealing tests quickly, stably and accurately. In addition, the holes of some injection molded parts may be set at an angle, which results in the holes and the pressure inflation sensing joints of the test not corresponding. Testing this type of injection molded parts is relatively troublesome. For this reason, we need to make improvements. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the background technology, and a device for testing the sealing performance of an injection mold is proposed, comprising an airtight test bench and an airtight test seat fixedly installed on the upper inner side of the airtight test bench, and a test mold, guide lifting assemblies are arranged on both sides of the airtight test bench, a guide frame is arranged on the outer side of the guide lifting assembly, an inclined frame is fixedly connected to the outer side of the guide frame, a slideway is provided inside the inclined frame, one end of the slideway is connected to a slider through a set abutment mechanism, the slider slides inside the slideway, fixed plates are symmetrically installed on the outer surface of the slider, a clamping shaft is inserted between the two fixed plates, a connecting rod is connected to the lower outer side of the clamping shaft through a set rotation limiter, a clamping assembly is arranged on the outer side of the connecting rod, the test mold is in contact with the clamping assembly, and an airtight test piece is arranged on the outside of the airtight test bench.

[0006] Preferably, the guide lifting assembly includes a guide frame vertically installed on one side of the airtight test bench, a screw rod is rotatably installed on the inner side of the guide frame, a motor is provided at the lower end of the screw rod, the motor is fixedly connected to the airtight test bench, a support is slidably installed on the outer side of the guide frame, a connecting seat is provided on one side of the support, the connecting seat is threadedly matched with the screw rod, and the support is fixedly connected to the guide frame.

[0007] Preferably, the abutment mechanism comprises a cylinder fixedly arranged at one end inside the oblique frame, and the telescopic end of the cylinder is connected to the slider via a provided connecting piece.

[0008] Preferably, the connecting member comprises a connecting head fixedly arranged at the telescopic end of the cylinder, a clamping seat is arranged at one end of the connecting head away from the cylinder, and the clamping seat is fixedly connected to the sliding block.

[0009] Preferably, the rotation limiting member includes a wrapping rod fixedly mounted on the lower outer side of the clamping shaft, a support plate is fixedly provided on the upper end surface of the wrapping rod, a clamping rod is slidably inserted into the inner side of the support plate, a ring seat is rotatably installed on the front end of the wrapping rod, clamping holes are opened at equal distances along the circumferential direction on the surface of the ring seat, the lower end of the clamping rod movably extends into one of the clamping holes, and the connecting rod is fixedly connected to the ring seat.

[0010] Preferably, the clamping assembly includes a movable rod rotatably fixedly mounted on the outside of the connecting rod, a universal joint is installed inside the end of the movable rod away from the connecting rod, a stop block is arranged on the outside of the end of the universal joint away from the movable rod, the stop block abuts against the outer surface of the test mold, an inclined plate is fixedly arranged on the outer surface of the movable rod, a barrel rod is symmetrically arranged on the outer side of the inclined plate, a spring is arranged inside the barrel rod, a stop rod is slidably installed inside the barrel rod and close to the spring at one end, and a stop frame is fixedly arranged on the end of the stop rod away from the barrel rod.

[0011] Preferably, the airtight test piece includes a slide seat slidably mounted on the outside of the airtight test seat, a pressure inflation sensing joint is arranged inside the slide seat, and a pushing mechanism is arranged in the middle of the rear end of the slide seat.

[0012] Preferably, the pushing mechanism includes a stopper fixedly arranged on the outer side of the rear end of the slide, a hydraulic cylinder is fixedly arranged on the lower end surface of the stopper, and the bottom of the hydraulic cylinder is connected to the outer side of the airtight test seat through a fixedly arranged fixing seat.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By respectively arranging guide lifting components on both sides of the airtight test bench, the corresponding connecting seats on the outer side can be driven to move up and down, and then adjusted according to the orientation of the air holes on the test mold, so that the block at the movable rod can fit the outer surface of the test mold. When the airtightness is tested by inflation, the pressure inflation sensing joint can correspond to the inclined air holes on the test mold, so that air can be injected well for the airtightness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 This is a schematic diagram of the connection structure of the guide lifting assembly of the present invention; Figure 4 It is a schematic diagram of the connection structure between the test mold and the support frame of the present invention; Figure 5 This is a schematic diagram of the connection structure of the clamping assembly of the present invention; Figure 6 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle.

[0015] In the figure: 1. airtight test bench; 2. airtight test seat; 3. slide seat; 4. guide frame; 5. screw rod; 6. support; 7. pressure inflation sensing joint; 8. test mold; 9. motor; 10. stop seat; 11. hydraulic cylinder; 12. fixed seat; 13. connecting seat; 14. inclined frame; 15. slider; 16. clamping seat; 17. inclined plate; 18. stop frame; 19. cylinder rod; 20. spring; 21. clamping shaft; 22. rod wrapping; 23. ring seat; 24. clamping hole; 25. connecting rod; 26. movable rod; 27. universal joint; 28. stop block; 29. ​​clamping rod; 30. cylinder; 31. connector; 32. fixed plate; 33. slideway; 34. guide frame; 35. stop plate; 36. stop rod. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] like Figure 1-Figure 6The injection mold sealing test device shown in the figure includes an airtight test bench 1 and an airtight test seat 2 fixedly installed on the upper inner side of the airtight test bench 1 and a test mold 8. Guide lifting components are arranged on both sides of the airtight test bench 1. A guide frame 34 is arranged on the outer side of the guide lifting component. An inclined frame 14 is fixedly connected to the outer side of the guide frame 34. A slideway 33 is provided inside the inclined frame 14. The purpose of providing the slideway 33 is to allow the slider 15 to slide more stably. The slider 15 is connected to one end of the slideway 33 through a set abutment mechanism. The slider 15 slides inside the slideway 33. Fixed plates 32 are symmetrically installed on the outer surface of the slider 15. A clamping shaft 21 is interspersed between the two fixed plates 32. A connecting rod 25 is connected to the lower outer side of the clamping shaft 21 through a set rotation limiter. A clamping assembly is arranged on the outer side of the connecting rod 25. The test mold 8 is in contact with the clamping assembly. An airtight test piece is arranged on the outside of the airtight test bench 1.

[0019] The guide lifting assembly includes a guide frame 4 vertically installed on one side of the airtight test bench 1, a screw rod 5 is rotatably installed inside the guide frame 4, a motor 9 is arranged at the lower end of the screw rod 5, the motor 9 is fixedly connected to the airtight test bench 1, a support 6 is slidably installed on the outer side of the guide frame 4, a connecting seat 13 is arranged on one side of the support 6, the connecting seat 13 is threadedly matched with the screw rod 5, and the support 6 is fixedly connected to the guide frame 34; After the motor 9 is connected to the power supply, it can drive the corresponding screw rod 5 to rotate, and then the connecting seat 13 drives the support 6 to rise and fall. As a result, the abutment mechanism located on the outside of both sides of the airtight test bench 1 can be adjusted and used accordingly according to the position of the test mold 8.

[0020] The abutment mechanism includes a cylinder 30 fixedly arranged at one end of the inner side of the inclined frame 14, and the telescopic end of the cylinder 30 is connected to the slider 15 through a connecting piece; The connecting member includes a connecting head 31 fixedly arranged at the telescopic end of the cylinder 30, and a clamping seat 16 is arranged at one end of the connecting head 31 away from the cylinder 30, and the clamping seat 16 is fixedly connected to the slider 15; The cylinder 30 can drive the slider 15 to slide inside the slideway 33 through the connection of the connecting piece, so as to facilitate the subsequent stable clamping of the test mold 8.

[0021] The rotation limiter comprises a wrap rod 22 fixedly sleeved on the lower outer side of the clamping shaft 21, a stop plate 35 is fixedly arranged on the upper end surface of the wrap rod 22, a clamping rod 29 is slidably inserted into the inner side of the stop plate 35, a ring seat 23 is rotatably mounted on the front end of the wrap rod 22, and clamping holes 24 are opened at equal distances along the circumferential direction on the surface of the ring seat 23, the lower end of the clamping rod 29 movably extends into one of the clamping holes 24, and the connecting rod 25 is fixedly connected to the ring seat 23; The stop plate 35 can be used to conveniently set the locking rod 29 above the wrapping rod 22. When the ring seat 23 rotates, the locking rod 29 is correspondingly inserted into the locking hole 24, and the ring seat 23 is fixed on the outside of the wrapping rod 22. The locking method is simple to operate and has a good locking effect.

[0022] The clamping assembly includes a movable rod 26 that is rotatably fixedly sleeved on the outside of the connecting rod 25, a universal joint 27 is installed inside the end of the movable rod 26 away from the connecting rod 25, a stop block 28 is arranged outside the end of the universal joint 27 away from the movable rod 26, and the stop block 28 abuts against the outer surface of the test mold 8, an inclined plate 17 is fixedly arranged on the outer surface of the movable rod 26, and a cylindrical rod 19 is symmetrically arranged on the outer side of the inclined plate 17, and a spring 20 is arranged inside the cylindrical rod 19, and a stop rod 36 is slidably installed inside the cylindrical rod 19 and at one end close to the spring 20, and a stop frame 18 is fixedly arranged on the end of the stop rod 36 away from the cylindrical rod 19; The movable rod 26 can drive the universal joint 27 and the stopper 28 to rotate. Under the movable connection of the universal joint 27, the stopper 28 can be flexibly pressed against the edge of the curved surface of the test mold 8, and the pressure inflation sensing joint 7 can be accurately connected with the inclined air hole on the test mold 8, thereby performing air tightness detection on the inclined air hole mold; The cylindrical rod 19 and the push rod 36 at the inclined plate 17 can support the lower end surface of the test mold 8 after rotation, so that inflation and testing can be carried out more smoothly during the air tightness test. The push frame 18 can always fit the outer surface of the test mold 8 under the elastic pressure of the push rod 36 and the spring 20.

[0023] The airtight test piece includes a slide seat 3 slidably mounted on the outside of the airtight test seat 2, a pressure-inflating sensing joint 7 is arranged inside the slide seat 3, a pushing mechanism is arranged in the middle of the rear end of the slide seat 3, and the pushing mechanism includes a stop seat 10 fixedly arranged on the outside of the rear end of the slide seat 3, a hydraulic cylinder 11 is fixedly arranged on the lower end surface of the stop seat 10, and the bottom of the hydraulic cylinder 11 is connected to the outside of the airtight test seat 2 through a fixedly arranged fixed seat 12; Under the up and down lifting drive of the hydraulic cylinder 11, the stopper 10 can drive the slide 3 to move, and the corresponding pressure inflation sensing joint 7 will also adjust its height according to the position of the test mold 8 after being fixed; It should be specially noted that the pressure inflation sensing connector 7 is connected to an external airtightness detector before the pressure detection, so as to read the pressure value and other data of the airtightness test, but the above are all existing technologies and will not be elaborated in detail.

[0024] Working principle: When in use, driven by the motor 9, the screw 5 rotates inside the guide frame 4, and the connecting seat 13 can drive the support 6 to drive the guide frame 34 to move up and down. The height of the support 6, the connecting seat 13, and the guide frame 34 are adjusted according to the air holes on the test mold 8. The worker rotates the test mold 8 so that the air holes inclined inside the test mold 8 correspond vertically to the position of the pressure inflation sensing joint 7, and then the cylinder 30 drives the clamping seat 16 and the slider 15 at the telescopic end to move inside the inclined frame 14, and the clamping shaft 21 and the wrapping rod 22 correspondingly drive the connecting rod 25 and the movable rod 26 to move to the bottom of the inclined frame 14. , manually rotate the movable rod 26 to make the butt block 28 fit the curved edge of the test mold 8, and then insert the clamping rod 29 above the ring seat 23 into the clamping hole 24 at the corresponding position, and then clamp the ring seat 23 and the connecting rod 25, so that the butt block 28 can be stably clamped on the outer surface of the test mold 8. In order to perform airtightness detection more stably during the inflation process, after the position of the movable rod 26 is determined, the butt frame 18 at the inclined plate 17 is also flexibly clamped on both sides of the test mold 8 under the elastic pressure of the spring 20. In this way, the airtightness test of the test mold 8 with inclined pores can be performed more conveniently and quickly.

[0025] The above shows and describes 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, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A device for testing the sealing performance of an injection mold, comprising an airtight test bench (1), an airtight test seat (2) fixedly mounted on the upper inner side of the airtight test bench (1), and a test mold (8), characterized in that: Guide lifting assemblies are provided on both sides of the airtight test bench (1), a guide frame (34) is provided on the outer side of the guide lifting assembly, an inclined frame (14) is fixedly connected to the outer side of the guide frame (34), a slideway (33) is provided inside the inclined frame (14), one end of the slideway (33) is connected to a slider (15) through a provided abutment mechanism, the slider (15) slides inside the slideway (33), a fixed plate (32) is symmetrically installed on the outer surface of the slider (15), a clamping shaft (21) is inserted between the two fixed plates (32), a connecting rod (25) is connected to the outer side of the clamping shaft (21) through a provided rotation limiter, a clamping assembly is provided on the outer side of the connecting rod (25), the test mold (8) is in contact with the clamping assembly, and an airtight test piece is provided on the outside of the airtight test bench (1).

2. The device for testing the sealing performance of injection mold according to claim 1, characterized in that: The guide lifting assembly comprises a guide frame (4) vertically mounted on one side of the airtight test bench (1); a screw rod (5) is rotatably mounted on the inner side of the guide frame (4); a motor (9) is arranged at the lower end of the screw rod (5); the motor (9) is fixedly connected to the airtight test bench (1); a support (6) is slidably mounted on the outer side of the guide frame (4); a connecting seat (13) is arranged on one side of the support (6); the connecting seat (13) and the screw rod (5) are threadedly matched; the support (6) and the guide frame (34) are fixedly connected.

3. The injection mold sealing test device according to claim 1, characterized in that: The abutment mechanism comprises a cylinder (30) fixedly arranged at one end inside the inclined frame (14), and the telescopic end of the cylinder (30) is connected to the slider (15) via a provided connecting piece.

4. The device for testing the sealing performance of injection mold according to claim 3, characterized in that: The connecting member comprises a connecting head (31) fixedly arranged at the telescopic end of the cylinder (30), a clamping seat (16) being arranged at one end of the connecting head (31) away from the cylinder (30), and the clamping seat (16) is fixedly connected to the sliding block (15).

5. The injection mold sealing test device according to claim 1, characterized in that: The rotation limiting member comprises a wrapping rod (22) fixedly sleeved on the lower outer side of the clamping shaft (21); a support plate (35) is fixedly arranged on the upper end surface of the wrapping rod (22); a clamping rod (29) is slidably inserted into the inner side of the support plate (35); a ring seat (23) is rotatably mounted on the front end of the wrapping rod (22); clamping holes (24) are equidistantly formed on the surface of the ring seat (23) along the circumferential direction; the lower end of the clamping rod (29) movably extends into one of the clamping holes (24); and the connecting rod (25) is fixedly connected to the ring seat (23).

6. The device for testing the sealing performance of injection mold according to claim 1, characterized in that: The clamping assembly comprises a movable rod (26) which is rotatably fixedly sleeved on the outside of the connecting rod (25); a universal joint (27) is installed inside the end of the movable rod (26) away from the connecting rod (25); a stop block (28) is arranged outside the end of the universal joint (27) away from the movable rod (26); the stop block (28) abuts against the outer surface of the test mold (8); an inclined plate (17) is fixedly arranged on the outer surface of the movable rod (26); a cylindrical rod (19) is symmetrically arranged on the outer side of the inclined plate (17); a spring (20) is arranged inside the cylindrical rod (19); a stop rod (36) is slidably installed inside the cylindrical rod (19) and at one end close to the spring (20); and a stop frame (18) is fixedly arranged on the end of the stop rod (36) away from the cylindrical rod (19).

7. The device for testing the sealing performance of injection mold according to claim 1, characterized in that: The airtight test piece comprises a slide seat (3) slidably mounted on the outside of the airtight test seat (2), a pressure inflation sensing joint (7) is arranged inside the slide seat (3), and a pushing mechanism is arranged in the middle of the rear end of the slide seat (3).

8. The device for testing the sealing performance of injection mold according to claim 7, characterized in that: The pushing mechanism comprises a stopper (10) fixedly arranged on the outer side of the rear end of the slide seat (3), a hydraulic cylinder (11) fixedly arranged on the lower end surface of the stopper (10), and a bottom of the hydraulic cylinder (11) connected to the outer side of the airtight test seat (2) via a fixedly arranged fixing seat (12).

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