A high-efficiency exhaust device for plastic molds

Abstract

The present invention relates to the field of injection molding technology, and discloses a high-efficiency exhaust device for plastic molds, comprising a lower mold and an upper mold, wherein a cylindrical pin for exhaust is provided in the lower mold, a base is fixedly installed on the side wall of the lower mold, an adjustment component is provided between the base and the upper mold, a support component that is rotatably mounted on the adjustment component and abuts against the pin, and a limit component that is movably fitted with the support component is provided inside the pin. The present invention can realize the corresponding disassembly and assembly of the pin during the mold closing process through the coordination between the pin, the adjustment component, the support component and the limit component. When the mold is closed, the pin can be automatically inserted into the lower mold to complete the assembly, and when the mold is opened, the pin can be automatically removed to complete the disassembly, which can effectively improve the overall disassembly and assembly efficiency of the pin based on the lower mold and facilitate the effective cleaning of the outer surface of the pin.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding, and in particular to a high-efficiency exhaust device for a plastic mold. Background Art

[0002] Vent inserts are often installed in plastic molds at locations prone to trapped air. These vents are then expelled through vent channels within the inserts. Because the vent channels are connected to the mold cavity, small amounts of plastic can flow into the vent channels and cause blockages, necessitating frequent removal of the inserts for cleaning or replacement. However, inserts are typically embedded in the mold, and the vent channels within these inserts are very narrow, making direct removal from the mold difficult.

[0003] For example, Chinese patent publication number CN107718457A discloses a vent insert and an injection mold. The vent insert comprises: a slider having a mounting hole formed in a horizontal direction, the front end of the slider forming a mating surface for tightly contacting the outer surface around the puncture hole of the injection molded part; an insert pin disposed in the mounting hole, the front end of the insert pin extending from the slider and being inserted into the puncture hole of the injection molded part to form a puncture position, the insert pin and the mounting hole being loosely fitted to form an vent channel between the insert pin and the slider, the vent channel being used to vent air after cold glue is formed during injection molding. An vent channel is formed between the insert pin and the slider, and the protruding section of the insert pin is inserted into the puncture hole of the injection molded part during injection molding to form a puncture position. During injection molding, plastic flows into the vent channel and can be vented through the vent channel after cold glue is formed. The surface of the injection molded product is free of burrs, and the yield rate is high.

[0004] The pin of this application is positioned by a positioning screw and several butterfly springs. The disassembly and assembly of the pin is very troublesome. It is necessary to use tools to remove the positioning screw and then take out several butterfly springs in turn. It is also troublesome to remove the pin from the narrow installation hole, which has certain limitations in use.

[0005] Therefore, it is necessary to provide a high-efficiency exhaust device for plastic molds to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide a high-efficiency exhaust device for a plastic mold to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, a high-efficiency exhaust device for plastic molds with fast and automatic disassembly of insert pins is designed.

[0008] Based on the above ideas, the present invention provides the following technical solutions: a high-efficiency exhaust device for a plastic mold, comprising a lower mold and an upper mold, wherein a cylindrical pin for exhaust is provided in the lower mold, a base is fixedly installed on the side wall of the lower mold, and an adjusting component is jointly provided between the base and the upper mold, a supporting component that is rotatably installed on the adjusting component and abuts against the pin, and a limiting component that is movably fitted with the supporting component is provided inside the pin; when the lower mold and the upper mold are closed, the supporting component and the pin can be driven to move into the lower mold through the adjusting component, and when the lower mold and the upper mold are separated, the supporting component and the pin can be driven to move out of the lower mold through the adjusting component.

[0009] As a further solution of the present invention: the limiting assembly includes a slider slidably installed in the pin, and a second spring is fixedly installed between the surface of the slider close to the support assembly and the inner wall of the pin, and the second spring makes the slider tend to move away from the support assembly.

[0010] As a further solution of the present invention: the end of the inlay pin is provided with a placement groove for placing the slider, the second spring and the support assembly, and the placement groove is designed in a side U shape with the U-shaped opening pointing towards the support assembly.

[0011] As a further solution of the present invention: the support assembly includes a cross bar, one end of which is rotatably engaged with the adjustment assembly, and the other end is inserted into the placement groove and abuts against the placement groove. The outer surface of the cross bar is elastically connected to a block abutting against the slider through a first spring, and the first spring makes the block tend to slide out toward the outer surface of the cross bar.

[0012] As a further solution of the present invention: the surfaces of the slider and the block are both provided with inclined surfaces, and the inclined surfaces of the slider and the block point in opposite directions; when the cross bar drives the block to move out of the placement groove, the block can push the slider to move in the same direction and squeeze the spring until the slider is against the other side wall of the placement groove.

[0013] As a further solution of the present invention: the adjustment assembly includes a circular sleeve rotatably mounted on the base and a rack fixedly connected to the upper mold, the outer surface of the circular sleeve is fixedly mounted with a first gear corresponding to the position of the rack, and the internal thread of the circular sleeve is connected to a screw that rotatably cooperates with one end of the cross bar.

[0014] As a further solution of the present invention: a rotating assembly is provided between the rack and the cross bar. When the rack drives the rotating assembly to move, the circular sleeve can be driven to rotate through the first gear, and then the cross bar and the inlay pin can be driven to rotate through the rotating assembly.

[0015] As a further solution of the present invention: the rotating assembly includes a second gear fixedly mounted on the outer surface of the crossbar and two side plates fixedly connected to the rack, and tooth segments corresponding to the position of the second gear are fixedly mounted on opposite sides of the two side plates.

[0016] As a further solution of the present invention: the tooth segments on the two side plates are symmetrically staggered, and one of the tooth segments is in meshing state with the second gear; when the tooth segment on one side plate is in meshing state with the second gear, the tooth segment on the other side plate is in a separated state with the second gear.

[0017] As a further solution of the present invention: the length of the side plate along the axial direction of the crossbar is greater than the length of the second gear along the axial direction of the crossbar, so that when the crossbar moves with the screw, the tooth segment can always remain in meshing state with the second gear.

[0018] Compared with the prior art, the present invention has the following advantages: through the coordination between the insert pin, adjustment assembly, support assembly, and limit assembly, the cylindrical insert pin can be driven to move horizontally back and forth, and the insert pin can be quickly assembled with the lower mold only by horizontal movement. The insert pin can be assembled and disassembled by utilizing the closing process of the upper and lower molds. When the molds are closed, the insert pin is automatically inserted into the lower mold to complete assembly, and when the molds are opened, the insert pin is automatically removed to complete disassembly. This effectively improves the overall assembly and disassembly efficiency of the insert pin with respect to the lower mold and facilitates the effective cleaning of the insert pin's outer surface.

[0019] When the insert pin needs to be replaced, it is only necessary to pull the insert pin toward the lower mold to quickly disassemble the insert pin based on the support assembly; when the insert pin needs to be installed, the insert pin is aligned with the support assembly and inserted, and the insert pin is pushed toward the support assembly until it contacts the support assembly. Therefore, the disassembly and assembly of the insert pin based on the support assembly is also very simple, which can effectively reduce the labor burden of workers and relatively improve the overall efficiency of the injection molding process, making it more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the lower mold and base structure of the present invention;

[0023] Figure 3 Schematic diagram of the screw, crossbar and pin structure of the present invention;

[0024] Figure 4 Schematic diagram of the internal structure of the inlay pin of the present invention;

[0025] Figure 5 for Figure 4 A magnified view of the structure at center A;

[0026] Figure 6 It is a schematic structural diagram of the rack and rotating assembly of the present invention;

[0027] Figure 7This is a schematic structural diagram of the second gear and side plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the side plate and rack structure of the present invention;

[0029] Figure 9 It is a schematic diagram of the circular sleeve and sleeve structure of the present invention;

[0030] Figure 10 It is a schematic diagram of the round sleeve and the inlay pin structure of the present invention.

[0031] In the figure: 1. Lower mold; 2. Upper mold; 3. Base; 4. Adjustment assembly; 5. Support assembly; 6. Inlay pin; 7. Limit assembly; 8. Inclined surface; 9. Rotation assembly; 10. Sleeve; 101. Round hole; 401. Round sleeve; 402. Rack; 403. Screw; 404. First gear; 501. Cross bar; 502. Block; 503. First spring; 601. Mounting groove; 701. Slider; 702. Second spring; 901. Second gear; 902. Side plate; 903. Tooth segment. DETAILED DESCRIPTION

[0032] Example 1:

[0033] See also Figures 1 to 5 An embodiment of the present invention provides a high-efficiency exhaust device for a plastic mold, which is mainly used to realize the rapid disassembly and assembly of an inlay pin 6. The device includes a lower mold 1 and an upper mold 2 that are adapted to each other. An inlay pin 6 for exhaust is provided in the lower mold 1. A base 3 is fixedly installed on the side wall of the lower mold 1. An adjustment component 4 is jointly provided between the base 3 and the upper mold 2. A support component 5 that is against the inlay pin 6 is rotatably installed at the end of the adjustment component 4 away from the base 3. A limiting component 7 that movably fits with the support component 5 is provided inside the inlay pin 6.

[0034] When the upper mold 2 approaches the lower mold 1, the adjusting assembly 4 drives the support assembly 5 and the insert pin 6 into the lower mold 1, so that the insert pin 6 reaches the designated position of the lower mold 1 (where it can reach the cavity of the lower mold 1). When the upper mold 2 moves away from the lower mold 1, the adjusting assembly 4 drives the support assembly 5 and the insert pin 6 completely out of the lower mold 1, thereby facilitating the quick cleaning of the insert pin 6. At the same time, pulling the insert pin 6 toward the lower mold 1 can quickly separate the insert pin 6 from the support assembly 5, thereby also enabling quick removal of the insert pin 6. During this process, the support assembly 5 is automatically held stationary by the adjusting assembly 4 and the base 3.

[0035] In this embodiment, the insert pin 6 is generally cylindrical in shape. A circular hole 101 is defined in the sidewall of the corresponding lower mold 1 for receiving the insert pin 6. The overall diameter of the circular hole 101 is constant, allowing the insert pin 6 to be inserted directly during installation. Once inserted, the insert pin 6 automatically forms an exhaust channel, which allows for efficient exhaust. The upper mold 2, lower mold 1, insert pin 6, and exhaust channel all utilize existing, mature technologies and are not described in detail here.

[0036] Reference Figures 3 to 5 In this embodiment, preferably, the limiting component 7 includes a slider 701 slidably installed in the pin 6, and a second spring 702 is fixedly installed between the surface of the slider 701 close to the support component 5 and the inner wall of the pin 6. The second spring 702 makes the slider 701 tend to move away from the support component 5, and the second spring 702 limits the slider 701 to the side away from the support component 5.

[0037] Correspondingly, the end of the pin 6 defines a receiving slot 601 for the slider 701, second spring 702, and support assembly 5. The receiving slot 601 has a sideways U-shaped cross-section, with the opening of the U pointing toward the support assembly 5. The second spring 702 is positioned in the upper portion of the receiving slot 601, while the slider 701 is positioned in the middle and upper portions of the slot. The support assembly 5 is positioned in the lower portion of the slot 601.

[0038] Reference Figures 3 to 5 In this embodiment, preferably, the support assembly 5 includes a cross bar 501, one end of the cross bar 501 is rotatably engaged with the adjustment assembly 4, and the other end is inserted into the placement groove 601 and abuts against the groove wall of the placement groove 601. The outer surface of the cross bar 501 is elastically connected to a block 502 abutting against the slider 701 through a first spring 503. The first spring 503 makes the block 502 have a tendency to slide out toward the outer surface of the cross bar 501.

[0039] Furthermore, the surfaces of the slider 701 and the block 502 are both provided with an inclined surface 8. Figure 5From the perspective, the inclined surface 8 of the slider 701 is slanted downward to the left, while the inclined surface 8 of the block 502 is slanted downward to the right, with the two pointing in opposite directions. When the crossbar 501 drives the block 502 to move into the receiving slot 601, the inclined surface 8 allows the block 502 to automatically retract into the crossbar 501; when the crossbar 501 drives the block 502 to contact the slider 701, the inclined surface 8 also allows the block 502 to automatically retract into the crossbar 501; when the crossbar 501 drives the block 502 to move out of the receiving slot 601, the block 502 can push the slider 701 to move in the same direction until the slider 701 contacts the other side of the receiving slot 601, at which point the slider 701 cannot move further. If the crossbar 501 drives the block 502 to move out of the receiving slot 601 again, the inclined surface 8 can again cause the block 502 to automatically retract into the crossbar 501.

[0040] It should be noted that when the pin 6 and the crossbar 501 are assembled normally, the end of the crossbar 501 is against the wall of the placement groove 601, achieving Figure 5 At this time, the clamping block 502 is located on the side of the slider 701 away from the second spring 702, and the two are in a state of contact, and the clamping block 502 is in a state of extreme extension relative to the cross bar 501. At the same time, under the action of the second spring 702, the slider 701 has a tendency to push the clamping block 502 to move to the right, which can further ensure that the end of the cross bar 501 is in a state of abutment with the receiving groove 601.

[0041] Reference Figures 2 to 4 In this embodiment, the adjustment assembly 4 preferably includes a circular sleeve 401 rotatably mounted on the base 3 and a rack 402 fixedly connected to the upper mold 2. A first gear 404 is fixedly mounted on the outer surface of the circular sleeve 401, corresponding to the position of the rack 402. A screw 403 is internally threadedly connected to the circular sleeve 401 and rotatably engaged with one end of the crossbar 501. When the upper mold 2 approaches the lower mold 1, the rack 402 drives the first gear 404 and the circular sleeve 401 to rotate, thereby causing the screw 403 to approach the lower mold 1 and move the crossbar 501 and the insert pin 6 into the circular hole 101.

[0042] During use, the insert pin 6 is first placed outside the crossbar 501 so that the end of the crossbar 501 abuts against the receiving groove 601. Then, the upper mold 2 approaches the lower mold 1 and drives the rack 402 to move synchronously. The rack 402 drives the crossbar 501 and the insert pin 6 into the circular hole 101 through the first gear 404, the circular sleeve 401, and the screw 403, so that the insert pin 6 reaches the designated position in the lower mold 1. At this point, the upper mold 2 and the lower mold 1 are closed and the injection molding process can be carried out. The exhaust channel formed by the insert pin 6 and the circular hole 101 ensures efficient exhaust.

[0043] After processing is completed, the upper die 2 moves away from the lower die 1 and drives the rack 402 to move synchronously. The rack 402, in turn, drives the cross bar 501 and the insert pin 6 out of the circular hole 101 through the first gear 404, the circular sleeve 401, and the screw 403. At this time, the outer surface of the insert pin 6 can be quickly and thoroughly cleaned. When the insert pin 6 is pulled toward the lower die 1, the clamping block 502 can drive the slider 701 to move toward the cross bar 501 and eventually fit into the other side of the receiving groove 601 (the cross bar 501 is limited by the screw 403). At this time, the slider 701 can no longer move, and the clamping block 502 will retract into the cross bar 501, thereby quickly separating the insert pin 6 from the cross bar 501.

[0044] In summary, the coordination of the pin 6, crossbar 501, screw 403, and sleeve 401 allows the cylindrical pin 6 to reciprocate horizontally, and only horizontal movement is required to quickly assemble the pin 6 within the circular hole 101. Furthermore, the assembly and disassembly of the pin 6 are achieved by utilizing the closing process of the upper mold 2 and lower mold 1. During closing, the pin 6 is automatically inserted into the circular hole 101 for assembly, and during parting, the pin 6 is automatically removed for disassembly. There is no need to align the pin 6 with the circular hole 101, effectively improving the overall assembly and disassembly efficiency of the pin 6 within the lower mold 1 and facilitating efficient cleaning of the outer surface of the pin 6.

[0045] When the insert pin 6 needs to be replaced, since the cross bar 501 is limited by the screw 403, the insert pin 6 only needs to be pulled in the direction of the lower mold 1 to achieve quick disassembly of the insert pin 6 based on the cross bar 501; when the insert pin 6 needs to be installed, the mounting groove 601 is aligned with the cross bar 501 and removed, and the insert pin 6 is pushed toward the cross bar 501 until the end of the cross bar 501 is against the mounting groove 601. Therefore, the disassembly and assembly of the insert pin 6 based on the cross bar 501 is also very simple, which can effectively reduce the labor burden of workers and relatively improve the overall efficiency of the injection molding process, and is more practical.

[0046] Example 2:

[0047] See also Figures 1 to 8 On the basis of Example 1, considering that the insert pin 6 may form a certain adhesion with the injection molded part due to glue flow during the injection molding process, if the screw 403 directly drives the insert pin 6 to move out of the circular hole 101 through the cross bar 501, the resistance formed by the adhesion may affect the removal of the insert pin 6, and then the cross bar 501 moves outward while the insert pin 6 cannot move outward synchronously with the cross bar 501, affecting the automatic removal of the insert pin 6 from the lower mold 1.

[0048] To this end, a rotating assembly 9 is provided between the rack 402 and the cross bar 501. When the rack 402 descends with the upper mold 2, it will first drive the inlay pin 6 to move to the specified position through the first gear 404, the screw 403 and the cross bar 501, and then the upper mold 2 will continue to drive the rack 402 to continue to descend. At this time, the rack 402 is separated from the first gear 404, so that the first gear 404 no longer rotates, and the inlay pin 6 will no longer move horizontally. The rack 402 drives the cross bar 501 to deflect back and forth at a small angle through the rotating assembly 9, and the cross bar 501 drives the inlay pin 6 to deflect synchronously through the block 502 and the placement groove 601.

[0049] Correspondingly, when the upper mold 2 is separated, the rack 402 can first drive the inserting pin 6 to deflect back and forth at a small angle through the rotating component 9, so that the inserting pin 6 is separated from the injection molded part, and then the rack 402 drives the inserting pin 6 to move out of the circular hole 101 through the first gear 404, the screw 403 and the cross bar 501.

[0050] It should be noted that: in this embodiment, when the inserting pin 6 reaches the specified position along the circular hole 101, the upper mold 2 and the lower mold 1 will reach a fully closed state, so that the upper mold 2 can still drive the rotating component 9 to move through the rack 402, but at this time the rack 402 is separated from the first gear 404 so that the inserting pin 6 no longer moves.

[0051] Reference Figures 6 to 8 In this embodiment, preferably, the rotating assembly 9 includes a second gear 901 fixedly mounted on the outer surface of the crossbar 501 and two side plates 902 fixedly connected to the rack 402. A tooth segment 903 corresponding to the position of the second gear 901 is fixedly mounted on opposite sides of the two side plates 902. The tooth segments 903 on the two side plates 902 are symmetrically staggered, and one of the tooth segments 903 is in meshing state with the second gear 901. When the tooth segment 903 on one side plate 902 is engaged with the second gear 901, the tooth segment 903 on the other side plate 902 is separated from the second gear 901. Consequently, when the tooth segments 903 on both sides come into contact with the second gear 901, they can sequentially drive the second gear 901 to reciprocate by a small angle, and the tooth segments 903 on both sides do not interfere with each other.

[0052] The side plate 902 needs to have a certain length along the axial direction of the crossbar 501 (greater than the axial length of the second gear 901 along the crossbar 501) so that the tooth segment 903 can always remain in meshing engagement with the second gear 901 as the crossbar 501 moves with the screw 403. This longer angle is not shown in this embodiment. The meshing of the tooth segment 903 with the second gear 901 limits the rotation of the crossbar 501 and the insert pin 6, thereby preventing the insert pin 6 from rotating indiscriminately.

[0053] In the above structure, combined with Figure 8The tooth segments 903 on the two side plates 902 and the teeth on the rack 402 are offset up and down, so that the tooth segments 903 first drive the inserting pin 6 to rotate through the second gear 901, and then the rack 402 drives the inserting pin 6 to translate through the first gear 404.

[0054] During use, the pin 6, crossbar 501 and circular sleeve 401 structures can realize the rapid disassembly and assembly of the pin 6 based on the lower mold 1 and the crossbar 501. The working process and effect of this part are the same as those in Example 1 and will not be repeated here. The difference is that: when closing the mold, the rack 402 can first contact the first gear 404, and then the circular sleeve 401, screw 403 and crossbar 501 can drive the pin 6 to move to the specified position in the lower mold 1, and then the mold closing continues so that the tooth segments 903 on both sides contact the second gear 901 in turn, thereby causing the crossbar 501 and the pin 6 to deflect back and forth at a small angle. When parting the mold, the tooth segment 903 contacts the second gear 901, which can first drive the pin 6 to deflect back and forth at a small angle, so that the pin 6 is separated from the injection molded part, and then the rack 402 contacts the first gear 404 to move the pin 6 out of the circular hole 101.

[0055] Compared to the first embodiment, the coordination of the crossbar 501, rack 402, side plate 902, and second gear 901 allows the pin 6 to be driven to rotate back and forth at a small angle before removal, separating it from the molded part and preventing adhesion. This ensures that the pin 6 can move outward synchronously with the crossbar 501, thereby ensuring smooth removal of the pin 6 from the lower mold 1. The small angle deflection also reduces damage to the molded part, ensuring its quality. This overall solution, combined with the crossbar 501 and rack 402, and the provision of the tooth segment 903 and second gear 901, further facilitates the rotational limitation of the crossbar 501 and pin 6, preventing arbitrary self-rotation of the pin 6, and thus enhancing its applicability.

[0056] Example 3:

[0057] See also Figures 1 to 10 On the basis of the second embodiment, considering the arrangement of the base 3, the rack 402 and the side plate 902, the disassembly space of the inserting pin 6 based on the lower mold 1 is very limited, and it is inconvenient for the staff to hold the inserting pin 6 and pull the inserting pin 6, and thus there are certain limitations in use.

[0058] To this end, the circular sleeve 401 and the second gear 901 are improved: at this time, a sleeve 10 is fixedly installed on the surface of the circular sleeve 401 close to the lower mold 1, and the sleeve 10 corresponds to the inlay pin 6 and there is an overlapping area between the two. At the same time, the size of the second gear 901 is correspondingly reduced so that the second gear 901 can enter the interior of the sleeve 10.

[0059] When the screw 403 rotates and drives the crossbar 501 and the insert pin 6 out of the circular hole 101, a portion of the crossbar 501 and the second gear 901 enter the interior of the sleeve 10, and eventually the end of the sleeve 10 abuts against the end of the insert pin 6. At this time, if the screw 403 drives the crossbar 501 to continue moving toward the circular sleeve 401, the sleeve 10 pushes the insert pin 6 away from the crossbar 501, thereby releasing the restraint between the insert pin 6 and the crossbar 501.

[0060] Furthermore, the relative ends of the sleeve 10 and the inlay pin 6 can be jointly provided with magnetic poles with opposite magnetic properties (not shown in the figure), so that after the sleeve 10 and the inlay pin 6 are fitted together, effective adsorption is formed through the magnetic poles, which can not only prevent the inlay pin 6 from falling off, but also form a relative fixation after the inlay pin 6 is replaced, so that when the screw 403 drives the cross bar 501 toward the lower mold 1, the inlay pin 6 is adsorbed by the sleeve 10 and will not move synchronously immediately. When the cross bar 501 is inserted into the receiving groove 601 and abuts against it, the screw 403 drives the movement of the cross bar 501 to cause the inlay pin 6 and the cross bar 501 to move synchronously.

[0061] During use, the pin 6, crossbar 501, and sleeve 401 structures enable rapid assembly and disassembly of the pin 6 relative to the lower mold 1 and crossbar 501. The crossbar 501, rack 402, and second gear 901 structures enable the pin 6 to be driven to rotate back and forth at a small angle before removal, thereby separating the pin 6 from the molded part and preventing adhesion. The operating process and effects of this portion are the same as those of Example 2 and are not repeated here. The difference is that when the rack 402 and first gear 404 drive the pin 6 to be removed from the lower mold 1, the crossbar 501 and second gear 901 can sequentially enter the sleeve 10 until the end of the sleeve 10 abuts the end of the pin 6. The contact screw 403 then drives the crossbar 501 and pin 6 to continue moving, causing the pin 6 to move away from the crossbar 501 and release the limit. At this point, the pin 6 can be quickly disassembled by holding it, without having to pull the pin 6 toward the lower mold 1 relative to the crossbar 501.

[0062] Compared to the second embodiment, the coordination of the crossbar 501, sleeve 10, insert pin 6, and magnetic poles allows the insert pin 6 to automatically release its restraint against the crossbar 501 after removal, facilitating quick removal of the insert pin 6. Installation of the insert pin 6 requires only contact with the sleeve 10 via the magnetic poles, further simplifying assembly and disassembly of the insert pin 6 and minimizing the impact of structures such as the side plate 902 on its removal. This overall solution, combined with the provision of the circular sleeve 401, eliminates the need for the insert pin 6 to be moved toward the lower mold 1 during removal, further reducing burden and improving overall efficiency, thus meeting more practical requirements.

Claims

1. A high-efficiency exhaust device for a plastic mold, comprising a lower mold and an upper mold, characterized in that: The lower mold is provided with a cylindrical inlay pin for exhaust, a base is fixedly installed on the side wall of the lower mold, an adjustment component is provided between the base and the upper mold, a support component is rotatably installed on the adjustment component to abut against the inlay pin, and a limit component is provided inside the inlay pin to movably fit with the support component; when the lower mold and the upper mold are closed, the support component and the inlay pin can be driven to move into the lower mold through the adjustment component, and when the lower mold and the upper mold are separated, the support component and the inlay pin can be driven to move out of the lower mold through the adjustment component; The limiting assembly includes a slider slidably mounted in the inlay pin, and a second spring is fixedly mounted between the surface of the slider close to the support assembly and the inner wall of the inlay pin, so that the second spring tends to move the slider away from the support assembly; The end of the inlay pin is provided with a placement groove for placing the slider, the second spring and the support assembly. The placement groove is designed in a side U shape with the U-shaped opening pointing towards the support assembly. The support assembly includes a crossbar, one end of which is rotatably engaged with the adjustment assembly, and the other end of which is inserted into and abuts against the placement groove. The outer surface of the crossbar is elastically connected to a block abutting against the slider via a first spring, and the first spring causes the block to have a tendency to slide out toward the outer surface of the crossbar; The surfaces of the slider and the block are both provided with inclined surfaces, and the inclined surfaces of the slider and the block point in opposite directions; when the cross bar drives the block to move out of the placement groove, the block can push the slider to move in the same direction and squeeze the second spring until the slider abuts against the other side of the placement groove; The adjustment assembly includes a circular sleeve rotatably mounted on the base and a rack fixedly connected to the upper mold. A first gear corresponding to the position of the rack is fixedly mounted on the outer surface of the circular sleeve, and the internal thread of the circular sleeve is connected to a screw that rotatably cooperates with one end of the cross bar.

2. The high-efficiency exhaust device for plastic mold according to claim 1, characterized in that: A rotating assembly is provided between the rack and the crossbar. When the rack drives the rotating assembly to move, the circular sleeve is first driven to rotate through the first gear, and then the crossbar and the inlay pin are driven to rotate through the rotating assembly.

3. The high-efficiency exhaust device for plastic mold according to claim 2, characterized in that: The rotating assembly includes a second gear fixedly mounted on the outer surface of the crossbar and two side plates fixedly connected to the rack, and tooth segments corresponding to the position of the second gear are fixedly mounted on opposite sides of the two side plates.

4. The high-efficiency exhaust device for plastic mold according to claim 3, characterized in that: The tooth segments on the two side plates are staggered, and one of the tooth segments is in meshing state with the second gear; when the tooth segment on one side plate is in meshing state with the second gear, the tooth segment on the other side plate is in a separated state from the second gear.

5. The high-efficiency exhaust device for plastic mold according to claim 3, characterized in that: The length of the side plate along the axial direction of the crossbar is greater than the length of the second gear along the axial direction of the crossbar, so that when the crossbar moves with the screw, the tooth segment can always maintain a meshing state with the second gear.

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