An injection molded part pneumatic punching and gating fixture

Abstract

The present invention discloses a pneumatic punching and trimming fixture for injection molded parts, which relates to the technical field of fixtures. Based on the stamping principle, the present invention uses an upper cutting block and a lower supporting knife block that move in two directions as a cutting tool structure to complete the shearing action of the sprue. During the shearing process, the cutting tool structure will not cause problems with the incision of the workpiece. Instead, during the continuous downward movement of the upper cutting block, the grinding groove is used to complete the grinding action of the sprue incision position, so that there is no need for secondary treatment of the workpiece with the sprue removed. At the same time, during the action of removing the sprue, three actions of workpiece adsorption, positioning, and clamping, as well as a position compensation structure, are added. The positioning and clamping actions and the position compensation structure are to ensure the accuracy of the cutting position. Among them, the adsorption action is to facilitate the separation of the cut sprue from the workpiece, and its ultimate goal is to simplify the overall processing steps.

Description

Technical Field

[0001] The present invention relates to the technical field of jigs, and particularly relates to a pneumatic punching and trimming jig for injection molded parts. Background Art

[0002] The sprue refers to the combined part of the frame and the part formed during the casting (injection) of the mold, and can also be called the gate. Taking an injection mold as an example, the hot glue is injected into the interior of the injection mold and enters the cavity along the sprue / gate runner. After cooling, a semi-finished product is formed. It is necessary to cut off the sprue on the semi-finished product and finally polish the cut.

[0003] For the process of trimming the sprue, in order to improve production efficiency, most current ones are mainly automated equipment. Reference can be made to the automatic picking, placing and shearing device for trimming the sprue of the regulating valve in CN104369206A. Its principle is to automatically grab the product and put it into the jig, and cut off the sprue in a cutting manner. Here, it mainly refers to injection molded parts with relatively small volumes, such as injection molded parts of flat panels / internal precision devices of mobile phones. Strictly speaking, the dimensional accuracy of its injection molded products is between 0.1 and 0.01 mm. However, in the conventional sprue trimming, the sprue cannot be completely cut off, otherwise it will scratch the injection molded part product. Then, after trimming the sprue, there will be a part of the cut mark left at the original sprue / gate runner position, which needs to be processed secondly, prolonging the overall processing cycle.

[0004] In addition, in the action of placing the injection molded part, when there is a slight deviation between the placement position and the preset position, it will cause a great deviation to the overall injection molded part product, and even cause damage to the injection molded part and make it unusable. Summary of the Invention

[0005] The purpose of the present invention is to provide a pneumatic punching and trimming jig for injection molded parts, which is used to solve the problem that when trimming the sprue of the injection molded part semi-finished product, there is a cut mark left on the semi-finished product after trimming the sprue, and it is necessary to extend the processing cycle to process the cut mark secondly.

[0006] The purpose of the present invention can be realized by the following technical solutions: A pneumatic punching and trimming jig for injection molded parts, including a bottom support plate, on which two symmetrically arranged linear tracks are installed. And a total assembly box is installed at the middle position of the upper surface of the bottom support plate. The two linear tracks are arranged along the length direction of the bottom support plate and penetrate through the total assembly box. And a slide plate and a recycling frame are respectively arranged on the linear tracks. The center point position of the upper surface of the total assembly box is installed with a total assembly cylinder. The output shaft of the total assembly cylinder penetrates downward into the interior of the total assembly box, and the end of the output shaft of the total assembly cylinder is installed with an upper pressing plate. The upper surface of the slide plate is installed with a lower support plate. A plurality of lower positioning platforms are arranged on the upper surface of the lower support plate. A plurality of upper positioning platforms corresponding to the lower positioning platforms are installed on the lower surface of the upper pressing plate.

[0007] A cavity is provided at the center point position inside each of the multiple lower positioning platforms. A lower tool supporting block is arranged in the cavity in a vertically sliding connection manner. An upper cutting block is installed at the position of the upper positioning platform corresponding to the lower tool supporting block.

[0008] Workpieces are placed at both sides of the cavity inside the lower positioning platform. The outer walls of the upper cutting block and the workpiece close to each other are in the same vertical plane, and a grinding groove is arranged at the position of the outer wall of the upper cutting block close to the workpiece.

[0009] Side positioning platforms are installed at both ends of the linear track on the bottom support plate. Position compensation structures are arranged at the positions of the two side positioning platforms and the recycling frame close to the lower support plate.

[0010] It is further set that: telescopic rods arranged vertically are installed at the four corners of the top end of the inner wall of the assembly box. The bottom ends of the four telescopic rods are installed on the upper surface of the upper pressure plate.

[0011] It is further set that: a linear motor is installed at the center position of the lower surfaces of the recycling frame and the sliding plate.

[0012] It is further set that: the position compensation structure includes two displacement sensors and an electric telescopic rod. The setting directions of the displacement sensors and the electric telescopic rod are parallel to the length direction of the linear track, and contact heads are installed at the ends of the output shafts of the displacement sensors and the electric telescopic rod.

[0013] It is further set that: the two displacement sensors and the electric telescopic rod are arranged in a triangular shape along the width direction of the linear track. A protective sleeve is installed inside the recycling frame, and the electric telescopic rod located in the recycling frame is installed inside the protective sleeve.

[0014] It is further set that: the starting position of the contact head on the electric telescopic rod is located at the rear side of the starting position of the contact head on the displacement sensor.

[0015] It is further set that: two vertically arranged connecting sleeve rods are symmetrically installed along the position of the upper cutting block on the upper positioning platform. The connecting sleeve rods extend upward to the upper side of the upper surface of the upper pressure plate. A positioning air pipe is slidably installed inside the connecting sleeve rods. A rubber suction cup is installed at the end of the positioning air pipe, and the positioning air pipe is communicated with the rubber suction cup.

[0016] It is further set that: the setting position of the rubber suction cup corresponds to the placing position of the workpiece. A first spring is arranged on the circumferential outer wall of the middle part of the positioning air pipe between the connecting sleeve rod and the rubber suction cup.

[0017] Further set as: At the bottom end of the inner wall of the lower positioning table, two positioning structures are symmetrically arranged along the cavity position. The positioning structure includes a sliding frame and an auxiliary cylinder. A chute matching the sliding frame is opened at the bottom end of the inner wall of the lower positioning table. The upper surface of the sliding frame is on the same plane as the bottom end of the inner wall of the lower positioning table, and two vertically arranged inner pressure rods are installed at one end of the sliding frame close to the cavity. The auxiliary cylinder is installed on the upper surface position of the lower support plate, and the output end of the auxiliary cylinder is connected to the sliding frame.

[0018] Further set as: The upper surfaces of the two inner pressure rods are on the same horizontal plane as the upper surface of the lower positioning table.

[0019] Further set as: The lower support plate is provided with a ventilation and discharge groove corresponding to the position of the lower support cutter block.

[0020] Further set as: A second spring is installed at the center point position of the bottom end of the inner wall of the cavity, and the top end of the second spring is connected to the lower support cutter block.

[0021] The present invention has the following beneficial effects:

[0022] 1. Based on the stamping principle, the present invention uses the upward cutting block and the downward support guide block that move in two directions to form a cutting tool structure, thereby completing the action of cutting the water inlet of the workpiece. When cutting the water inlet, the movement mode of the upward cutting block is divided into two steps. The movement process of the first step is used to cut the water inlet, but there is a cut after the water inlet is cut on the workpiece. The movement process of the second step is to use the abrasive groove on the upward cutting block to complete the grinding action of the cut. The purpose is to complete the water inlet cutting operation in a "one-step" manner without damaging the workpiece, and no secondary treatment is required.

[0023] 2. The overall equipment is divided into a recycling box and a lower support plate. The lower support plate is used as the workpiece conveying structure, and the recycling box is used to recycle the workpieces with the water inlets cut off, which is convenient for classified recycling. It should be noted that: during the workpiece conveying and cutting operations, three actions of workpiece adsorption, positioning, and clamping and a position compensation structure are synchronously added. The adsorption action is convenient for adsorbing the workpieces with the water inlets cut off, and can also perform secondary clamping and positioning on the workpieces during the cutting action. The positioning and clamping actions are the preliminary positioning of the workpieces.

[0024] 3. The position compensation structure indirectly feeds back the movement positions of the recycling box and the lower support plate by the distance between the recycling box and the lower support plate and the distance between the recycling box and the lower support plate from the side fixing table, and performs position compensation according to the position feedback. The ultimate goal is to ensure the accurate position of cutting the water inlet. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 Structural schematic diagram of a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0027] Figure 2 Sectional view of the assembly box component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0028] Figure 3 Structural schematic diagram of the upper pressure plate component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0029] Figure 4 Partial sectional view of the upper pressure plate component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0030] Figure 5 Structural schematic diagram of part A in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0031] Figure 6 Structural schematic diagram of the bottom support plate component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0032] Figure 7 Structural schematic diagram of the recycling box component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0033] Figure 8 Structural schematic diagram of the lower support plate component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention;

[0034] Figure 9 Partial sectional view of the lower support plate component in a pneumatic punching and trimming fixture for injection molded parts proposed by the present invention.

[0035] In the figure: 1. Assembly box; 2. Bottom support plate; 3. Telescopic link rod; 4. Assembly cylinder; 5. Side fixing platform; 6. Slide plate; 7. Linear track; 8. Upper pressing plate; 9. Lower support plate; 10. Upper positioning platform; 11. Upper cutting block; 12. Connecting sleeve rod; 13. Positioning air pipe; 14. First spring; 15. Rubber suction cup; 16. Frosted groove; 17. Recycling frame; 18. Protective sleeve; 19. Electric telescopic rod; 20. Contact head; 21. Displacement sensor; 22. Linear motor; 23. Lower positioning platform; 24. Venting and discharging groove; 25. Auxiliary cylinder; 26. Slide carriage; 27. Slide groove; 28. Cavity; 29. Inner pressure rod; 30. Second spring; 31. Lower cutting tool block. Specific embodiments

[0036] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The present invention only introduces the action of removing the sprue of the injection molded part, and does not include the conveying structure of the injection molded part. For the action of removing the sprue, the following embodiments are subdivided:

[0038] Embodiment 1

[0039] In the conventional sprue cutting action, the sprue cannot be completely removed. Because when the cutting tool structure completely fits the injection molded part, there will be a problem of scratching the injection molded part. Subsequently, after removing the sprue, there will be a part of the incision trace left at the original sprue / gate position, which needs to be processed secondarily, prolonging the overall processing cycle. Therefore, the following technical solutions are proposed:

[0040] Referring to Figures 1 to 9 , in this embodiment, a pneumatic sprue cutting jig for injection molded parts includes a bottom support plate 2. It is characterized in that two symmetrically arranged linear tracks 7 are installed on the bottom support plate 2, and an assembly box 1 is installed at the middle position of the upper surface of the bottom support plate 2. The two linear tracks 7 are arranged along the length direction of the bottom support plate 2 and penetrate through the assembly box 1. A slide plate 6 and a recycling frame 17 are respectively arranged on the linear tracks 7. An assembly cylinder 4 is installed at the center point position of the upper surface of the assembly box 1. The output shaft of the assembly cylinder 4 penetrates downward into the interior of the assembly box 1, and an upper pressing plate 8 is installed at the end of the output shaft of the assembly cylinder 4. A lower support plate 9 is installed on the upper surface of the slide plate 6, and a plurality of lower positioning platforms 23 are arranged at the upper surface position of the lower support plate 9. A plurality of upper positioning platforms 10 corresponding to the lower positioning platforms 23 are installed on the lower surface of the upper pressing plate 8;

[0041] A cavity 28 is provided at the position of the center point inside multiple lower positioning platforms 23. A lower tool support block 31 is slidably connected in the cavity 28 in the vertical direction, and an upper cutting block 11 is installed at the position of the upper positioning platform 10 corresponding to the lower tool support block 31;

[0042] Workpieces are placed on both sides of the cavity 28 inside the lower positioning platform 23. The outer walls of the upper cutting block 11 and the workpiece close to each other are in the same vertical plane, and a frosted groove 16 is provided at the position of the outer wall of the upper cutting block 11 close to the workpiece;

[0043] Side positioning platforms 5 are installed at both ends of the linear track 7 on the bottom support plate 2. Position compensation structures are provided at the positions of the two side positioning platforms 5 and the recycling frame 17 close to the lower support plate 9. Telescopic rods 3 are installed vertically at the four corners of the inner top of the assembly box 1, and the bottom ends of the four telescopic rods 3 are installed on the upper surface of the upper pressure plate 8. A linear motor 22 is installed at the center of the lower surface of the recycling frame 17 and the slide plate 6.

[0044] Working principle: Refer to the appendix Figure 6 , where the recycling frame 17 is used to recycle the injection-molded workpieces with the gates removed, and the lower support plate 9 is used to place the injection-molded workpieces to be processed. The process of placing the injection-molded workpieces will not be elaborated here;

[0045] The lower support plate 9 with the injection-molded workpieces placed on it slides inside the assembly box 1 along the linear track 7 until it moves to the position directly below the upper pressure plate 8. This part is specifically divided into: positioning and clamping action, shearing action, and adsorption action. This embodiment mainly details the shearing action, which is as follows:

[0046] Start the assembly cylinder 4 to drive the upper pressure plate 8 to move downward until the upper positioning platform 10 corresponds to the lower positioning platform 23, and the two are closed. During the closing process of the two, the upper cutting block 11 in the upper positioning platform 10 moves downward. When approaching the gate position on the injection-molded workpiece and continuing to move downward, the upper cutting block 11 completes the shearing action of the gate. It should be emphasized here that in the initial state, the outer wall of the upper cutting block 11 does not completely approach the injection-molded workpiece. For example, there is a gap of 1.5 - 2 mm between the lower cutting edge position of the upper cutting block 11 and the injection-molded workpiece. Then, after the gate is removed, a gate cut of 1.5 - 2 mm remains at the gate position of the injection-molded workpiece;

[0047] At this time, the upper cutting block 11 continues to move downward, and a frosted groove 16 is added at the position of the outer wall of the upper cutting block 11 close to the injection-molded workpiece. The frosted groove 16 is completely attached to the outer wall of the injection-molded workpiece. Therefore, when the frosted groove 16 continues to move downward, the 1.5 - 2 mm gate cut is ground flat, and the grinding action will not affect the overall injection-molded workpiece;

[0048] Then, after the gate is cut, the grinding process is carried out synchronously, so there is no need to add secondary processing, and the purpose is to simplify the overall processing steps.

[0049] Embodiment 2

[0050] Based on the working principle in Embodiment 1, the technical solution of this embodiment is optimized. Its purpose is to simplify the separation work of the workpiece and the sprue waste during the sprue cutting operation, and it is also necessary to perform position compensation on the positional relationship between the recycling box and the lower support plate in Embodiment 1. Specifically as follows:

[0051] The position compensation structure includes two displacement sensors 21 and an electric telescopic rod 19. The installation directions of the displacement sensors 21 and the electric telescopic rod 19 are parallel to the length direction of the linear track 7, and contact heads 20 are installed at the ends of the output shafts of the displacement sensors 21 and the electric telescopic rod 19. The two displacement sensors 21 and the electric telescopic rod 19 are arranged in a triangular shape along the width direction of the linear track 7. A protective sleeve 18 is installed inside the recycling box 17. Among them, the electric telescopic rod 19 located in the recycling box 17 is installed inside the protective sleeve 18. The starting position of the contact head 20 on the electric telescopic rod 19 is behind the starting position of the contact head 20 on the displacement sensor 21.

[0052] Working principle: Referring to Embodiment 1, during the movement of the recycling box 17 and the lower support plate 9, it is divided into the following steps:

[0053] Step 1: When the lower support plate 9 moves towards the inside of the assembly box 1, the recycling box 17 needs to move away from the lower support plate 9 to "make way" for the lower support plate 9;

[0054] Step 2: After the shearing operation is completed, the lower support plate 9 returns to its original position. The recycling box 17 moves towards the inside of the assembly box 1, catches the injection-molded workpiece with the sprue cut off, and then returns to its original position.

[0055] Combining the above two steps, in order to ensure the accuracy of the sprue cutting position, it is necessary to ensure the movement stroke of the recycling box 17 and the lower support plate 9. Among them, in the driving mode of the linear motor 22, there is a certain stroke deviation, so a position compensation structure is added. The principle is as follows:

[0056] A-1: During the reset process of the lower support plate 9, the lower support plate 9 contacts the side fixing platform 5 on the right side of the bottom support plate 2. Similarly, after the recycling box 17 is reset, it will also contact the side fixing platform 5 on the left side of the bottom support plate 2. In addition, when the recycling box 17 moves towards the assembly box 1, the position compensation structure on the recycling box 17 will contact the lower support plate 9;

[0057] A-2: When cycling and starting between Step 1 and Step 2, when the recycling box 17 and the lower support plate 9 contact the displacement sensors 21, or when the recycling box 17 contacts the lower support plate 9, the three displacement sensors 21 first record the position changes at the time of contact;

[0058] A-3: In A-2, there are deviations in the actual values of the displacement sensors 21 in the two measuring platforms 5. Therefore, the electric telescopic rods 19 at the corresponding positions are required to perform position compensation on the recycling frame 17 and the lower support plate 9 to ensure that the deviation between the actual position and the preset position is controlled within the maximum error range. The error range is mainly based on the size of the specific injection-molded workpiece and will not be elaborated here.

[0059] A-4: It should be noted again that when the lower support plate 9 is reset, it not only performs position compensation with the electric telescopic rods 19 on the corresponding measuring platforms 5 but also can be assisted by the electric telescopic rods 19 in the recycling frame 17. Similarly, when the recycling frame 17 enters the assembly box 1, secondary compensation can also be carried out through the position compensation structures between the recycling frame 17 and the lower support plate 9, and between the lower support plate 9 and the measuring platform 5.

[0060] Combined with A-1 to A-4, the purpose is to ensure the position accuracy of the injection-molded workpiece during the shearing process.

[0061] Embodiment Three

[0062] This specific embodiment one is to introduce the recycling frame structure in Embodiment One, and its purpose is to cooperate with the adsorption action in Embodiment One, specifically as follows:

[0063] Two vertically arranged connecting sleeve rods 12 are symmetrically installed along the position of the upper cutting block 11 on the upper positioning platform 10. The connecting sleeve rods 12 extend upward to the upper side of the upper surface of the upper pressure plate 8. A positioning air pipe 13 is slidably installed inside the connecting sleeve rods 12. A rubber suction cup 15 is installed at the end of the positioning air pipe 13, and the positioning air pipe 13 is communicated with the rubber suction cup 15. The installation position of the rubber suction cup 15 corresponds to the placement position of the workpiece. A first spring 14 is arranged on the circumferential outer wall of the middle part of the positioning air pipe 13 between the connecting sleeve rods 12 and the rubber suction cup 15.

[0064] Working principle: When the lower support plate 9 enters the assembly box 1 to perform the shearing work, when the upper pressure plate 8 moves downward, the rubber suction cup 15 first contacts the injection-molded workpiece and adsorbs and positions the injection-molded workpiece. Subsequently, the upper cutting block 11 then contacts the injection-molded workpiece. The purpose is to complete the secondary positioning of the injection-molded workpiece with the rubber suction cup 15 to ensure that the injection-molded workpiece will not deviate in position during shearing.

[0065] After shearing, the upper pressure plate 8 resets, and the rubber suction cup 15 continuously adsorbs the injection-molded workpiece. The purpose is to separate the injection-molded workpiece and the cut gate.

[0066] Embodiment Four

[0067] This embodiment is specifically to introduce the lower support plate structure in Embodiment One to cooperate with the clamping action in Embodiment One, specifically as follows:

[0068] At the bottom end of the inner wall of the lower positioning table 23, two positioning structures are symmetrically arranged along the position of the cavity 28. The positioning structures include a carriage 26 and an auxiliary cylinder 25. A chute 27 matching the carriage 26 is opened at the bottom end of the inner wall of the lower positioning table 23. The upper surface of the carriage 26 is on the same plane as the bottom end of the inner wall of the lower positioning table 23. And at one end of the carriage 26 close to the cavity 28, two vertically arranged inner pressing rods 29 are installed. The auxiliary cylinder 25 is installed on the upper surface of the lower support plate 9, and the output end of the auxiliary cylinder 25 is connected to the carriage 26. The upper surfaces of the two inner pressing rods 29 are on the same horizontal plane as the upper surface of the lower positioning table 23. The lower support plate 9 is provided with a ventilation and discharging groove 24 corresponding to the position of the lower support cutter block 31. At the center point of the bottom end of the inner wall of the cavity 28, a second spring 30 is installed, and the top end of the second spring 30 is connected to the lower support cutter block 31.

[0069] Working principle: Refer to the attached Figure 9 , after placing the injection molded workpiece and after the lower support plate 9 moves to the position directly below the upper pressure plate 8, synchronously start the auxiliary cylinder 25 in each lower positioning table 23 to drive the inner pressing rod 29 to move, position the injection molded workpiece in the position of the lower positioning table 23, and cooperate with the adsorption action in Embodiment 3 to position the injection molded workpiece in the way of combining upper pressure and side pressure, and further complete the clamping and positioning of the injection molded workpiece;

[0070] It should be noted that: in Embodiment 3, when the upper pressure plate 8 moves up and resets, it is necessary to start the auxiliary cylinder 25 again to control the inner pressing rod 29 to move in the reverse direction, "release" the injection molded workpiece from the side direction, but retain the adsorption action in Embodiment 3, and cooperate with the working principle in Embodiment 3 in this way;

[0071] The cut gate falls on the upper side of the cavity 28. After the lower support plate 9 resets, the cut gate can be blown out of the ventilation and discharging groove 24 by using an air gun.

[0072] In summary: Based on the stamping principle, the upper cutting block and the lower support cutter block that move in two directions are used as the cutting tool structure to complete the shearing action of the gate. During the shearing process, the cutting tool structure will not cause problems with the cut of the workpiece. Instead, during the process of the upper cutting block continuing to move down, the grinding groove is used to complete the grinding action of the cut position of the gate, so that there is no need to perform secondary processing on the workpiece with the gate removed. At the same time, in the action of removing the gate, three actions of workpiece adsorption, positioning, and clamping and a position compensation structure are added. The positioning and clamping actions and the position compensation structure are to ensure the accuracy of the cutting position. Among them, the adsorption action is to facilitate the separation of the cut gate from the workpiece, and its ultimate goal is to simplify the overall processing steps.

[0073] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as it does not deviate from the structure of the invention or exceed the scope defined by this claim book, it shall fall within the protection scope of the present invention.

[0074] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0075] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not elaborate all the details, nor do they limit the invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art of this technology can well understand and utilize the present invention. The present invention is only limited by the claim book and its full scope and equivalents.

Claims

1. An injection molding part pneumatic punching and gating fixture, including a bottom support plate, characterized in that, Two symmetrically arranged linear tracks are installed on the bottom support plate, and a total assembly box is installed at the middle position of the upper surface of the bottom support plate. The two linear tracks are arranged along the length direction of the bottom support plate and penetrate through the total assembly box. A sliding plate and a recycling frame are respectively arranged on the linear tracks. A total assembly cylinder is installed at the center point position of the upper surface of the total assembly box. The output shaft of the total assembly cylinder penetrates downward into the interior of the total assembly box, and an upper pressing plate is installed at the end of the output shaft of the total assembly cylinder. A lower support plate is installed on the upper surface of the sliding plate, and a plurality of lower positioning platforms are arranged at the upper surface position of the lower support plate. A plurality of upper positioning platforms corresponding to the lower positioning platforms are installed on the lower surface of the upper pressing plate; A cavity is opened at the center point position inside a plurality of the lower positioning platforms, and a lower tool block slidably connected in the vertical direction is arranged in the cavity. An upper cutting block is installed at the position of the upper positioning platform corresponding to the lower tool block; Workpieces are placed at the positions along both sides of the cavity inside the lower positioning platform. The outer walls of the upper cutting block and the workpiece close to each other are in the same vertical plane, and a grinding groove is arranged at the position of the outer wall of the upper cutting block close to the workpiece; Side positioning platforms are installed at both ends of the linear tracks on the bottom support plate. Position compensation structures are arranged at the positions of the two side positioning platforms and the recycling frame close to the lower support plate. The position compensation structure includes two displacement sensors and an electric telescopic rod. The setting directions of the displacement sensors and the electric telescopic rod are parallel to the length direction of the linear track, and contact heads are installed at the ends of the output shafts of the displacement sensors and the electric telescopic rod. The two displacement sensors and an electric telescopic rod are arranged in a triangular shape along the width direction of the linear track. A protective sleeve is installed inside the recycling frame, and the electric telescopic rod located in the recycling frame is installed inside the protective sleeve. The starting position of the contact head on the electric telescopic rod is behind the starting position of the contact head on the displacement sensor.

2. The pneumatic punching and gating fixture for injection molded parts according to claim 1, characterized in that Vertical telescopic rods are installed at the four corner positions of the top end inner wall of the total assembly box. The bottom ends of the four telescopic rods are installed on the upper surface of the upper pressing plate.

3. The pneumatic punching and trimming fixture for injection molded parts according to claim 1, characterized in that, Linear motors are installed at the center positions of the lower surfaces of the recycling frame and the sliding plate.

4. The pneumatic punching and gating fixture for injection molded parts according to claim 1, wherein Two vertically arranged connecting sleeve rods are symmetrically installed along the position of the upper cutting block on the upper positioning platform. The connecting sleeve rods extend upward to the upper side of the upper surface of the upper pressing plate. A positioning air pipe is slidably installed inside the connecting sleeve rod. A rubber suction cup is installed at the end of the positioning air pipe, and the positioning air pipe is communicated with the rubber suction cup.

5. The pneumatic punching and trimming fixture for injection molded parts according to claim 4, wherein The setting position of the rubber suction cup corresponds to the placing position of the workpiece. A first spring is arranged on the circumferential outer wall of the middle part between the connecting sleeve rod and the rubber suction cup of the positioning air pipe.

6. The pneumatic punching and trimming fixture for injection molded parts according to claim 1, characterized in that, Two positioning structures are symmetrically arranged along the cavity position at the bottom end inner wall of the lower positioning platform. The positioning structure includes a sliding frame and an auxiliary cylinder. A chute matching the sliding frame is opened at the bottom end inner wall of the lower positioning platform. The upper surface of the sliding frame is in the same plane as the bottom end inner wall of the lower positioning platform, and two vertically arranged inner pressing rods are installed at one end of the sliding frame close to the cavity. The auxiliary cylinder is installed at the upper surface position of the lower support plate, and the output end of the auxiliary cylinder is connected with the sliding frame.

7. An injection molding part pneumatic punching gate fixture according to claim 6, characterized in that, The upper surfaces of the two inner pressing rods are in the same horizontal plane as the upper surface of the lower positioning platform.

8. The pneumatic punching and gating fixture for injection molded parts according to claim 1, wherein The lower support plate is provided with a ventilation and discharge groove corresponding to the setting position of the lower support tool block.

9. An injection molded part pneumatic punching gate fixture according to claim 1, characterized in that, A second spring is installed at the center point position of the bottom end of the inner wall of the cavity, and the top end of the second spring is connected to the lower support tool block.

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