A pressure testing device for automobile parts injection mold and a method of using the same

Abstract

The present invention belongs to the field of detection technology, and in particular to a pressure testing device for an injection mold of an automobile part and a method for using the same. In view of the problem that the existing detection device can only detect one position of a mold, and the mold needs to be moved when detecting different positions, and the mold is heavy and it is laborious to move it to a table, the following scheme is proposed, which includes a base, two support columns are fixedly provided on the top of the base, the top of the two support columns are fixedly provided with the same top plate, the top of the top plate is penetrated and fixedly provided with two hydraulic cylinders, and the output ends of the two hydraulic cylinders are fixedly provided with the same lifting frame, and by arranging the trolley in a groove, it is convenient to move the mold to the bottom of the pressing block, and in the process of clamping the mold, it can also drive the cannula to be inserted into the waterway for waterway pressure detection, and at the same time, the pressing block can be driven to apply pressure to the surface of the mold at multiple points for detection by starting the hydraulic cylinder, which can improve the detection efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of mold detection, and in particular to a pressure testing device for an automobile part injection mold and a method for using the device. Background Art

[0002] Injection molds can form multiple plastic parts with complex structures, precise dimensions and good internal quality at one time, so they have been widely used in the production of plastic products. The injection mold process is to inject the heated and melted material into the mold cavity under high pressure, and obtain the molded product after cooling and solidification. After the mold is processed and formed, it is also necessary to conduct mold closing pressure and water pressure testing. It can only be put into use after passing the test.

[0003] After searching, the invention with announcement number CN117554204B discloses a plastic mold pressure testing device, which uses an external pressure measuring component to test the external pressure of the plastic mold, and uses an internal pressure measuring component to test the internal pressure of the plastic mold. This enriches the function of the tester, is conducive to continuous testing of the pressure resistance of both the inside and outside of the plastic mold, and improves applicability.

[0004] The above device also has the following disadvantages during use: the mold cannot be moved during the detection process, and the position of the vertical pressure sensor cannot be adjusted. It can only detect one position of the mold. When detecting different positions, the mold needs to be moved. In addition, the mold is heavy and it is more laborious to move it to the table. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art that the mold cannot be moved during the detection process, the position of the vertical pressure sensor cannot be adjusted, and only one position of the mold can be detected. When detecting different positions, the mold needs to be moved, and the mold is heavy, so it is more laborious to move it to the table. A pressure testing device for automobile parts injection molds and a method of using the same are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A pressure testing device for an injection mold of an automotive part comprises a base, two support columns fixedly provided on the top of the base, a top plate fixedly provided on the tops of the two support columns, two hydraulic cylinders fixedly provided on the top of the top plate, a lifting frame fixedly provided on the output ends of the two hydraulic cylinders, a nut block adjustable within the lifting frame, a pressure sensor fixedly provided on the bottom of the nut block, and a pressure block fixedly provided on the bottom of the pressure sensor for applying pressure to the surface of the mold for testing;

[0008] The adjustment mechanism is provided on the lifting frame and is used in conjunction with the hydraulic cylinder to adjust the position of the pressing block during the process of the hydraulic cylinder driving the pressing block to fully reset and move, thereby performing multi-position detection;

[0009] A groove is provided on the top of the base, a trolley is movably provided in the groove, a push plate is slidably provided on the trolley, the push plate is clamped to the base through a clamping piece, a limit frame used in conjunction with the push plate is fixed on the base for clamping the mold, the clamping piece can be used in conjunction with the hydraulic cylinder, and after the hydraulic cylinder is fully reset, the clamping piece is driven to release the fixation of the push plate;

[0010] The push plate is adjustable with two inserts, which are driven to be inserted into the corresponding water channels during the process of the push plate and the limit frame clamping the mold. The other end of the insert is connected to an external water pump to perform water channel pressure detection.

[0011] In one possible design, the adjusting mechanism includes a screw rod that is rotated through the lifting frame, the nut block is threadedly sleeved on the screw rod, the top end of the nut block is in contact with the bottom wall of the lifting frame, a first rack is provided on the top plate, and a sliding frame is slidably provided on the outer wall of the first rack. A rotating shaft is provided on one side of the sliding frame, and one end of the rotating shaft is clamped with the screw rod. A second gear that meshes with the first rack rod is provided on the outer wall of the rotating shaft through a one-way bearing sleeve. When the hydraulic cylinder drives the screw rod to reset upward, the screw rod is driven to rotate by the first rack and the second gear rod to adjust the position of the nut block.

[0012] In a possible design, a first sliding block is slidably provided on both sides of the lifting frame, the screw is rotatably provided on the two first sliding blocks, a first gear is fixedly sleeved on the outer wall of the screw, a second rack meshing with the first gear is fixedly provided on one side of the lifting frame, a first rectangular hole is opened on the top of the top plate, and the first rack is slidably provided in the first rectangular hole.

[0013] In one possible design, a sliding rod is provided through one side of the screw rod, a plug is provided at one end of the sliding rod, and a socket for connecting to the plug is opened at one end of the rotating shaft. After the connecting plate is disengaged from the socket, one end of the sliding rod is still located in the rotating shaft for supporting the rotating shaft.

[0014] In one possible design, the clamping member includes two extension strips fixedly arranged on both sides of the push plate, a wedge block is slidingly provided on the top of the extension strip, two third guide rods are fixedly provided on the top of the extension strip, the outer wall sliding sleeve of the two third guide rods is provided with the same sliding plate, the top end of the wedge block is fixedly connected to the sliding plate, the outer wall sleeve of the third guide rod is provided with a spring, the two ends of the spring are respectively fixedly connected to the outer wall of the third guide rod and the top of the sliding plate, a connecting frame is fixedly provided on one side of the support column and is located below the extension strip, and a plurality of limiting holes for use with the wedge blocks are opened on the top of the connecting frame

[0015] In a possible design, a first guide rod is fixed between the connecting frame and the base, a connecting plate is slidingly sleeved on the outer wall of the first guide rod, a first plug block corresponding to the limiting hole is fixedly provided on the top of the connecting plate, a connecting rod is slidingly provided through the top of the connecting frame, the bottom end of the connecting rod is fixedly connected to the connecting plate, and the top end of the connecting rod is fixedly sleeved with an extension block located above the lifting frame.

[0016] In a possible design, two second rectangular holes are opened on one side of the push plate, a sliding frame is provided in the second rectangular hole for sliding left and right, a second sliding block is provided in the sliding frame for sliding up and down, the insert tube is passed through the second sliding block, and there is resistance between the second rectangular hole and the sliding frame and between the sliding frame and the second sliding block, so it will not slide at will.

[0017] In a possible design, two groups of second guide rods are slidably provided on one side of the push plate, and the same give way plate is fixedly provided on one side of each group of second guide rods. A tension spring is sleeved on the outer wall of the second guide rod, and the two ends of the tension spring are respectively fixedly connected to the outer wall of the second guide rod and one side of the push plate, so as to increase the distance between the insert tube and the mold.

[0018] In a possible design, a nut ring is provided on the threaded sleeve of the outer wall of the sliding rod, and one end of the nut ring is rotatably mounted on the corresponding first sliding block for controlling the movement of the sliding rod.

[0019] A method for using a pressure testing device for an automobile part injection mold comprises the following steps:

[0020] S1. First, place the mold on the cart and push it into the base. Then, push the push plate to move with the limit frame to clamp the mold. At the same time, insert the cannula into the corresponding water channel and seal the other end of the water channel with a plug.

[0021] S2. Then, start the external water pump to fill the water channel and perform water channel pressure detection;

[0022] S3. Secondly, the hydraulic cylinder is started to drive the pressure block to move downward. The pressure sensor is subjected to a certain pressure. The hydraulic cylinder is started to drive the pressure block to reset and move. During the reset movement, the pressure block is driven to adjust its position. The hydraulic cylinder is started again to drive the pressure block to move downward for detection.

[0023] S4. After the test is completed, start the hydraulic cylinder to drive the pressing block to completely reset, then pull the sliding rod outward and rotate the sliding rod to drive the pressing block to reset.

[0024] In the present application, first, the mold is placed on the trolley and the trolley is pushed into the base. The sliding frame is driven to move by pushing the insert tube, and the sliding frame is pushed to move in the second rectangular hole until the insert tube corresponds to the water channel. Then, the push plate is pushed to move and cooperate with the limit frame to clamp and push the mold. During the pushing process, the tension spring can be stretched by the yield plate. At the same time, the wedge blocks on both sides will move upward under the action of the connecting frame and compress the spring through the sliding plate until the mold is completely clamped. At this time, the sliding plate is reset and moved under the action of the spring, driving the wedge block to be inserted into the corresponding limit hole, and at the same time, the insert tube is inserted into the corresponding water channel, and the other end of the water channel is sealed by the plug.

[0025] Then, start the external water pump to fill the water channel and perform water channel pressure testing;

[0026] Secondly, start the hydraulic cylinder to drive the lifting frame to move downward. At this time, the hydraulic cylinder is not fully retracted. The downward movement of the lifting frame can drive the nut block to move downward through the screw. At the same time, the downward movement of the screw can drive the rotating shaft to move downward through the plug on the sliding rod. Due to the effect of the one-way bearing, the rotating shaft will not follow the rotation of the second gear during the downward movement, and at the same time drive the sliding frame to move downward. The downward movement of the nut block can drive the pressure block to move downward until the pressure block contacts the mold surface and continues to move downward, so that the pressure sensor is subjected to a certain pressure for pressure detection. Then the hydraulic cylinder is started to drive the pressure block to reset and move. During the reset movement, the rotating shaft can be driven by the plug. When the cam is in the process of moving upward, the second gear can be driven to rotate in the opposite direction through the first rack, and the reverse rotation of the second gear can drive the rotating shaft to rotate through the one-way bearing. The rotation of the rotating shaft can drive the sliding rod to rotate through the plug, and the rotation of the sliding rod can drive the screw to rotate. The rotation of the screw can drive the first gear to roll on the second rack, drive the screw to move horizontally on the lifting frame, and drive the first gear to move through the plug. The movement of the rotating shaft can drive the pressure block to move in the first rectangular hole through the sliding frame. At the same time, the rotation of the screw can drive the nut block to move, and the position of the pressure block can be adjusted. The hydraulic cylinder is started again to drive the pressure block to move downward, and different positions of the mold surface are detected in turn;

[0027] When the test is completed, the hydraulic cylinder is started to fully reset and move, driving the lifting frame to move upward. The upward movement of the lifting frame can drive the connecting rod to move upward through the extension block. The upward movement of the connecting rod can drive the connecting plate to move upward. The upward movement of the connecting plate can drive the first plug block to be inserted into the corresponding limit hole. During the insertion process, the wedge block can be driven to move upward so that the bottom of the wedge block is flush with the top of the connecting frame. At this time, the push plate can be reset and moved under the action of the tension spring, and then the nut ring is rotated to drive the sliding rod to move outward in the screw. The movement of the sliding rod can make the convex part of the plug disengage from the socket. At this time, rotating the sliding rod in the opposite direction can drive the screw to rotate in the opposite direction. The rotation of the screw can drive the first gear to roll in the opposite direction on the second rack, and at the same time drive the nut block to reset and move, drive the pressure block to reset, so as to continue the inspection of the mold to be inspected.

[0028] Beneficial effects:

[0029] In the present invention, the pressure testing device for an injection mold of an automobile part is configured such that a trolley is placed in a groove so that the trolley can be pushed out at will, thereby facilitating the movement of the mold to the bottom of the pressing block without touching the pressing block during the movement, thereby improving safety and stability during the installation process.

[0030] In the present invention, the pressure testing device for an automobile parts injection mold can not only drive the pressure block to move up and down to apply pressure to the mold by activating the hydraulic cylinder, but also drive the pressure block to move during the reset process, so that it can perform multi-position testing without manually adjusting the position of the mold, making testing more convenient and quick, and improving testing efficiency;

[0031] In the present invention, the pressure testing device for an automobile parts injection mold is configured such that the cannula is movably arranged on the push plate, so that the cannula can be driven to be inserted into the water channel during the process of clamping the mold, eliminating the need for manual docking and making the connection more convenient.

[0032] In the present invention, the pressure testing device for an automobile parts injection mold can release the mold by completely resetting the hydraulic cylinder by activating it, without requiring additional clamping power, and can also manually reset the position of the pressure block, thereby reducing manufacturing costs and facilitating operation.

[0033] In the present invention, by arranging the trolley in the groove, it is convenient to move the mold to the bottom of the pressing block, and in the process of clamping the mold, it can also drive the cannula to be inserted into the water channel to perform water channel pressure detection. At the same time, it can also start the hydraulic cylinder to drive the pressing block to apply pressure detection to multiple points on the surface of the mold, which can improve the detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of a pressure testing device for an automobile parts injection mold proposed by the present invention;

[0035] Figure 2 This is a schematic diagram of the lifting frame connection structure of a pressure testing device for an automobile parts injection mold proposed by the present invention;

[0036] Figure 3 This is a schematic structural diagram of the nut block installation position of a pressure testing device for an automobile parts injection mold proposed by the present invention;

[0037] Figure 4 This is a schematic structural diagram of the second gear connection position of a pressure testing device for an automobile parts injection mold proposed by the present invention;

[0038] Figure 5 This is a schematic diagram of the base structure of a pressure testing device for an automobile parts injection mold proposed by the present invention;

[0039] Figure 6 This is a schematic diagram of the cart structure of a pressure testing device for an automobile parts injection mold proposed by the present invention;

[0040] Figure 7 The present invention provides a schematic diagram of the connection structure between the plug and the socket of a pressure testing device for an automobile part injection mold.

[0041] Figure: 1, base; 2, support column; 3, top plate; 4, groove; 5, cart; 6, limit frame; 7, hydraulic cylinder; 8, lifting frame; 9, pressure sensor; 10, pressure block; 11, push plate; 12, nut block; 13, screw; 14, first rectangular hole; 15, first rack; 16, first sliding block; 17, sliding rod; 18, plug; 19, nut ring; 20, first gear; 21, second rack; 22, sliding frame; 23, rotating shaft ; 24. Socket; 25. Second gear; 26. Connecting frame; 27. First guide rod; 28. Connecting plate; 29. ​​First plug block; 30. Limit hole; 31. Connecting rod; 32. Extension block; 33. Second rectangular hole; 34. Sliding frame; 35. Second sliding block; 36. Insert tube; 37. Second guide rod; 38. Give way plate; 39. Tension spring; 40. Extension strip; 41. Wedge block; 42. Third guide rod; 43. Spring; 44. Sliding plate. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] Example 1

[0044] Reference Figure 1-Figure 7A testing device comprises: a base 1, two support columns 2 are fixedly provided on the top of the base 1, a top plate 3 is fixedly provided on the top of the two support columns 2, two hydraulic cylinders 7 are fixedly provided on the top of the top plate 3, a lifting frame 8 is fixedly provided on the output ends of the two hydraulic cylinders 7, a nut block 12 is adjustable in the lifting frame 8, a pressure sensor 9 is fixedly provided at the bottom of the nut block 12, a pressure block 10 is fixedly provided at the bottom of the pressure sensor 9 for applying pressure to the surface of the mold for testing, and the pressure sensor 9 adopts the pressure sensor disclosed in patent document CN117554204B;

[0045] The adjustment mechanism is provided on the lifting frame 8 and is used in conjunction with the hydraulic cylinder 7 to adjust the position of the pressing block 10 during the process of the hydraulic cylinder 7 driving the pressing block 10 to fully reset and move, thereby performing multi-position detection;

[0046] A groove 4 is provided on the top of the base 1, in which a trolley 5 is movably provided, and a push plate 11 is slidably provided on the trolley 5. The push plate 11 is clamped to the base 1 through a clamping piece. A limit frame 6 is fixed on the base 1 and used in conjunction with the push plate 11 to clamp the mold. The clamping piece can be used in conjunction with the hydraulic cylinder 7. After the hydraulic cylinder 7 is fully reset, the clamping piece is driven to release the fixation of the push plate 11.

[0047] Two adjustable inserts 36 are provided on the push plate 11. When the push plate 11 and the limit frame 6 clamp the mold, the inserts 36 are driven to be inserted into the corresponding water channel. The other end of the inserts 36 is connected to an external water pump for water channel pressure detection. A pressure gauge is connected between them for observing the water channel pressure. By starting the two hydraulic cylinders 7, the lifting frame 8 can be driven to move downward. The downward movement of the lifting frame 8 can drive the pressure block 10 to move downward, so that it can apply pressure to the mold surface for detection. In the reset process, it can not only cooperate with the adjustment mechanism to automatically adjust the position of the pressure block 10, but also drive the clamping part to release the fixation of the push plate 11 after complete reset. The trolley 5 is movably arranged in the groove 4, so that it is convenient to move the mold and is more convenient to use.

[0048] The adjusting mechanism includes a screw 13 that is rotated through the lifting frame 8, and the nut block 12 is threadedly sleeved on the screw 13. The top of the nut block 12 is in conflict with the bottom wall of the lifting frame 8. A first rack 15 is provided on the top plate 3. A sliding frame 22 is slidably provided on the outer wall of the first rack 15. A rotating shaft 23 is provided on one side of the sliding frame 22. One end of the rotating shaft 23 is engaged with the screw 13. The outer wall of the rotating shaft 23 is provided with a second gear 25 that meshes with the first rack 15 through a one-way bearing sleeve. In the process of the hydraulic cylinder 7 driving the screw 13 to reset upward, the screw 13 is driven to rotate by the first rack 15 and the second gear 25 to adjust the position of the nut block 12. By starting the hydraulic cylinder 7 to drive The resetting movement of the lifting frame 8 can drive the screw rod 13 to move upward, and the upward movement of the screw rod 13 can drive the rotating shaft 23 to move upward, and the upward movement of the rotating shaft 23 can drive the second gear 25 to move upward. In the process of the second gear 25 moving upward, the second gear 25 can be driven to rotate by the first rack 15, and the rotation of the second gear 25 can drive the rotating shaft 23 to rotate through the one-way bearing. The rotation of the rotating shaft 23 can drive the screw rod 13 to rotate, thereby adjusting the position of the nut block 12. Due to the effect of the one-way bearing, when the hydraulic cylinder 7 drives the lifting frame 8 to move downward, the first rack 15 drives the second gear 25 to rotate, and does not drive the rotating shaft 23 to rotate.

[0049] A first sliding block 16 is provided for sliding through both sides of the lifting frame 8, and the screw 13 is provided on the two first sliding blocks 16 for rotation. A first gear 20 is fixedly sleeved on the outer wall of the screw 13, and a second rack 21 engaged with the first gear 20 is fixedly provided on one side of the lifting frame 8. A first rectangular hole 14 is provided on the top of the top plate 3, and the first rack 15 is slidably provided in the first rectangular hole 14. When the screw 13 moves upward and rotates, it can drive the first gear 20 to rotate, so that the first gear 20 rolls on the second rack 21, which can drive the screw 13 to move horizontally on the lifting frame 8. At the same time, the first rack 15 is driven to move in the first rectangular hole 14 through the sliding frame 22 and the rotating shaft 23, which can increase the moving distance of the nut block 12.

[0050] The clamping member includes two extension bars 40 fixedly arranged on both sides of the push plate 11, a wedge 41 is slidingly provided at the top of the extension bar 40, two third guide rods 42 are fixedly provided at the top of the extension bar 40, the outer wall sliding sleeve of the two third guide rods 42 is provided with the same sliding plate 44, the top of the wedge 41 is fixedly connected to the sliding plate 44, the outer wall sleeve of the third guide rod 42 is provided with a spring 43, the two ends of the spring 43 are respectively fixedly connected to the outer wall of the third guide rod 42 and the top of the sliding plate 44, a connecting frame 26 is fixedly provided on one side of the support column 2 below the extension bar 40, and the top of the connecting frame 26 is fixedly provided with the outer wall of the third guide rod 42 and the top of the sliding plate 44. The part is provided with multiple limiting holes 30 for use with wedge blocks 41. When the trolley 5 is located in the groove 4, it pushes the push plate 11 to move, which can drive the extension bar 40 to move. When the wedge block 41 contacts the connecting frame 26, it can drive the wedge block 41 to move upward through the connecting frame 26. The upward movement of the wedge block 41 can drive the sliding plate 44 to move upward and compress the spring 43. When it moves into place and stops moving, the sliding plate 44 can move downward under the action of the spring 43, driving the wedge block 41 to be inserted into the corresponding limiting hole 30, thereby limiting the push plate 11 and cooperating with the limiting frame 6 to limit the mold.

[0051] The top of the connecting plate 28 is fixedly provided with a first guide rod 27 between the connecting frame 26 and the base 1, and the outer wall of the first guide rod 27 is slidably sleeved with a connecting plate 28, and the top of the connecting plate 28 is fixedly provided with a first plug block 29 corresponding to the limit hole 30. A connecting rod 31 is slidably provided through the top of the connecting frame 26, and the bottom end of the connecting rod 31 is fixedly connected to the connecting plate 28. The top fixed sleeve of the connecting rod 31 is provided with an extension block 32 located above the lifting frame 8. When the hydraulic cylinder 7 is started and fully reset, it can drive the lifting frame 8 to continue to move upward. The lifting frame 8 can move upward by driving the connecting rod 31 to move upward through the extension block 32. The upward movement of the connecting rod 31 can drive the connecting plate 28 to move upward. The upward movement of the connecting plate 28 can drive the first plug block 29 to be inserted into the corresponding limit hole 30. During the insertion process, the wedge block 41 can be driven to move upward so that the bottom end of the wedge block 41 is flush with the top of the connecting frame 26. At this time, the push plate 11 can move at will, and the limit on the push plate 11 is released.

[0052] The present application can be used in the field of testing devices, and can also be used in other fields applicable to the present application.

[0053] Example 2

[0054] refer to Figure 1-Figure 7, improved on the basis of Example 1: a pressure testing device for an injection mold of an automobile part, which is applied to the field of mold inspection, a sliding rod 17 is provided on one side of the screw 13 for sliding, and a plug 18 is provided at one end of the sliding rod 17, and a socket 24 is provided at one end of the rotating shaft 23 for plugging with the plug 18. After the connecting plate 28 is disengaged from the socket 24, one end of the sliding rod 17 is still located in the rotating shaft 23, which is used to support the rotating shaft 23. By pulling the sliding rod 17 outward, the sliding rod 17 can be driven to move in the screw 13, so that the plug 18 is disengaged from the socket 24. At this time, rotating the sliding rod 17 can drive the screw 13 to rotate, and drive the screw 13 to move on the lifting frame 8, which is convenient for driving the pressure block 10 to reset and move, and is convenient for continuing to inspect the mold to be inspected.

[0055] Two second rectangular holes 33 are provided on one side of the push plate 11. A sliding frame 34 is provided in the second rectangular hole 33 for sliding left and right. A second sliding block 35 is provided in the sliding frame 34 for sliding up and down. The insert tube 36 is passed through the second sliding block 35, and there is resistance between the second rectangular hole 33 and the sliding frame 34 and between the sliding frame 34 and the second sliding block 35, so that the insert tube 36 will not slide at will. Through the setting of the sliding frame 34 and the second sliding block 35, the insert tube 36 can be moved up and down and left and right at will, which can facilitate the insert tube 36 to correspond to the mold waterway.

[0056] Two groups of second guide rods 37 are slidingly provided on one side of the push plate 11, and the same give-way plate 38 is fixedly provided on one side of each group of second guide rods 37. A tension spring 39 is sleeved on the outer wall of the second guide rod 37, and the two ends of the tension spring 39 are respectively fixedly connected to the outer wall of the second guide rod 37 and one side of the push plate 11, which is used to increase the distance between the insert 36 and the mold. The setting of the second guide rod 37 and the give-way plate 38 can increase the distance between the insert 36 and the mold, which can effectively prevent the mold from bumping into the insert 36 during the placement process, and can effectively protect the insert 36.

[0057] A nut ring 19 is provided on the threaded sleeve on the outer wall of the sliding rod 17, and one end of the nut ring 19 is rotatably provided on the corresponding first sliding block 16 to control the movement of the sliding rod 17. By rotating the nut ring 19, the sliding rod 17 can be driven to move in the screw rod 13, which is convenient for controlling the moving distance of the sliding rod 17, can prevent one end of the sliding rod 17 from being separated from the rotating shaft 23, and facilitate the control of the plug 18 to be inserted into the socket 24.

[0058] A method for using a pressure testing device for an automobile part injection mold comprises the following steps:

[0059] S1. First, place the mold on the cart 5 and push it into the base 1. Then, push the push plate 11 to move and cooperate with the limit frame 6 to clamp the mold. At the same time, insert the cannula 36 into the corresponding water channel and seal the other end of the water channel with a plug.

[0060] S2. Then, start the external water pump to fill the water channel and perform water channel pressure detection;

[0061] S3. Next, the hydraulic cylinder 7 is started to drive the pressing block 10 to move downward. The pressure sensor 9 is subjected to a certain pressure. When the hydraulic cylinder 7 is started, the pressing block 10 is reset and moved. During the reset process, the pressing block 10 is driven to adjust its position. The hydraulic cylinder 7 is started again to drive the pressing block 10 to move downward for detection.

[0062] S4. After the detection is completed, the hydraulic cylinder 7 is started to drive the pressing block 10 to completely reset, and then the sliding rod 17 is pulled outward and rotated to drive the pressing block 10 to reset.

[0063] However, as is well known to those skilled in the art, the working principles and wiring methods of the hydraulic cylinder 7 and the pressure sensor 9 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pressure testing device for injection molds of automobile parts, characterized in that: The invention comprises a base (1), two support columns (2) are fixedly provided on the top of the base (1), a top plate (3) is fixedly provided on the top of the two support columns (2), two hydraulic cylinders (7) are fixedly provided through the top of the top plate (3), a lifting frame (8) is fixedly provided at the output ends of the two hydraulic cylinders (7), a nut block (12) is adjustably provided in the lifting frame (8), a pressure sensor (9) is fixedly provided at the bottom of the nut block (12), and a pressure block (10) is fixedly provided at the bottom of the pressure sensor (9) for detecting pressure on the surface of the mold; The adjusting mechanism is arranged on the lifting frame (8) and is used in conjunction with the hydraulic cylinder (7) to adjust the position of the pressing block (10) during the process of the hydraulic cylinder (7) driving the pressing block (10) to completely reset and move, thereby performing multi-position detection; A groove (4) is provided on the top of the base (1), a trolley (5) is movably provided in the groove (4), a push plate (11) is slidably provided on the trolley (5), the push plate (11) is clamped with the base (1) through a clamping piece, a limit frame (6) used in conjunction with the push plate (11) is fixedly provided on the base (1) for clamping the mold, the clamping piece can be used in conjunction with the hydraulic cylinder (7), and after the hydraulic cylinder (7) is completely reset, the clamping piece is driven to release the fixation of the push plate (11); The push plate (11) is adjustable with two insert pipes (36). When the push plate (11) and the limit frame (6) clamp the mold, the insert pipes (36) are driven to be inserted into the corresponding water channels. The other end of the insert pipes (36) is connected to an external water pump to detect the water channel pressure.

2. The pressure testing device for injection mold of automobile parts according to claim 1, characterized in that: The adjusting mechanism comprises a screw rod (13) which is rotatably arranged in the lifting frame (8); the nut block (12) is threadedly sleeved on the screw rod (13); the top end of the nut block (12) contacts the bottom wall of the lifting frame (8); a first rack (15) is arranged on the top plate (3); a sliding frame (22) is slidably arranged on the outer wall of the first rack (15); a rotating shaft (23) is arranged on one side of the sliding frame (22); one end of the rotating shaft (23) is clamped with the screw rod (13); a second gear (25) meshing with the first rack (15) is arranged on the outer wall of the rotating shaft (23) through a one-way bearing sleeve; when the hydraulic cylinder (7) drives the screw rod (13) to reset upward, the screw rod (13) is driven to rotate through the first rack (15) and the second gear (25) to adjust the position of the nut block (12).

3. The pressure testing device for injection mold of automobile parts according to claim 2, characterized in that: First sliding blocks (16) are slidably provided on both sides of the lifting frame (8), the screw rod (13) is rotatably provided on the two first sliding blocks (16), a first gear (20) is fixedly sleeved on the outer wall of the screw rod (13), a second rack (21) meshing with the first gear (20) is fixedly provided on one side of the lifting frame (8), a first rectangular hole (14) is opened on the top of the top plate (3), and the first rack (15) is slidably provided in the first rectangular hole (14).

4. The pressure testing device for an automobile parts injection mold according to claim 3, characterized in that: A sliding rod (17) is slidably provided on one side of the screw rod (13), a plug (18) is provided on one end of the sliding rod (17), and a socket (24) for plugging with the plug (18) is provided on one end of the rotating shaft (23). After the connecting plate (28) is separated from the socket (24), one end of the sliding rod (17) is still located in the rotating shaft (23) for supporting the rotating shaft (23).

5. The pressure testing device for injection mold of automobile parts according to claim 1, characterized in that: The clamping member includes two extension bars (40) fixedly arranged on both sides of the push plate (11), a wedge block (41) slidingly extending through the top of the extension bar (40), two third guide rods (42) fixedly arranged on the top of the extension bar (40), the outer walls of the two third guide rods (42) slidingly sleeved with the same sliding plate (44), the top of the wedge block (41) fixedly connected with the sliding plate (44), the outer wall of the third guide rod (42) sleeved with a spring (43), the two ends of the spring (43) respectively fixedly connected with the outer wall of the third guide rod (42) and the top of the sliding plate (44), one side of the support column (2) is fixedly provided with a connecting frame (26) located below the extension bar (40), and the top of the connecting frame (26) is provided with a plurality of limiting holes (30) used in conjunction with the wedge blocks (41).

6. The pressure testing device for injection mold of automobile parts according to claim 5, characterized in that: A first guide rod (27) is fixedly provided between the connecting frame (26) and the base (1); a connecting plate (28) is slidably sleeved on the outer wall of the first guide rod (27); a first plug block (29) corresponding to the limiting hole (30) is fixedly provided on the top of the connecting plate (28); a connecting rod (31) is slidably provided through the top of the connecting frame (26); the bottom end of the connecting rod (31) is fixedly connected to the connecting plate (28); and an extension block (32) located above the lifting frame (8) is fixedly sleeved on the top of the connecting rod (31).

7. The pressure testing device for injection mold of automobile parts according to claim 1, characterized in that: Two second rectangular holes (33) are provided on one side of the push plate (11), a sliding frame (34) is provided in the second rectangular hole (33) for sliding left and right, a second sliding block (35) is provided in the sliding frame (34) for sliding up and down, the insertion tube (36) is passed through the second sliding block (35), and there is resistance between the second rectangular hole (33) and the sliding frame (34) and between the sliding frame (34) and the second sliding block (35), so that the insertion tube (36) will not slide at will.

8. The pressure testing device for injection mold of automobile parts according to claim 7, characterized in that: Two groups of second guide rods (37) are slidably provided on one side of the push plate (11), and a same give-way plate (38) is fixedly provided on one side of each group of the second guide rods (37). A tension spring (39) is sleeved on the outer wall of the second guide rod (37), and the two ends of the tension spring (39) are respectively fixedly connected to the outer wall of the second guide rod (37) and one side of the push plate (11), so as to increase the distance between the insert tube (36) and the mold.

9. The pressure testing device for injection mold of automobile parts according to claim 4, characterized in that: The outer wall of the sliding rod (17) is threadedly sleeved with a nut ring (19), and one end of the nut ring (19) is rotatably mounted on the corresponding first sliding block (16) for controlling the movement of the sliding rod (17).

10. A method for using a pressure testing device for an automobile part injection mold according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, place the mold on the cart (5), and push the cart (5) into the base (1), then push the push plate (11) to move and cooperate with the limit frame (6) to clamp the mold, and at the same time insert the insert pipe (36) into the corresponding water channel, and seal the other end of the water channel with a plug; S2, then, start the external water pump to fill the water channel with water and perform water channel pressure detection; S3. Secondly, the hydraulic cylinder (7) is started to drive the pressure block (10) to move downward, and the pressure sensor (9) is subjected to a certain pressure. When the hydraulic cylinder (7) is started, the pressure block (10) is driven to reset and move. During the reset movement, the pressure block (10) is driven to adjust its position. The hydraulic cylinder (7) is started again to drive the pressure block (10) to move downward, and detection is performed; S4. After the detection is completed, the hydraulic cylinder (7) is started to drive the pressing block (10) to completely reset, and then the sliding rod (17) is pulled outward and rotated to drive the pressing block (10) to reset.

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