Efficient exhaust device for plastic mold

Abstract

The invention relates to the technical field of injection molding processing, and discloses an efficient exhaust device for a plastic mold, the efficient exhaust device comprises a lower mold and an upper mold, a cylindrical insert pin used for exhausting is arranged in the lower mold, a base is fixedly mounted on the side wall of the lower mold, and an adjusting assembly is arranged between the base and the upper mold; a supporting assembly abutting against the insert pin is rotationally installed on the adjusting assembly, and a limiting assembly movably attached to the supporting assembly is arranged in the insert pin. Through cooperation of the insert pin, the adjusting assembly, the supporting assembly, the limiting assembly and the like, corresponding disassembly and assembly of the insert pin can be achieved in the mold closing process, the insert pin can be automatically inserted into the lower mold to complete assembly during mold closing, the insert pin can be automatically moved out to complete disassembly during mold splitting, and the overall disassembly and assembly efficiency of the insert pin based on the lower mold can be effectively improved; and the outer surface of the insert pin can be conveniently and effectively cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding processing, and particularly relates to an efficient exhaust device for a plastic mold. Background Art

[0002] In a plastic mold, exhaust inserts are usually installed at positions where "air entrapment" is likely to occur, and the gas is discharged through the exhaust channels in the inserts. Since the exhaust channels are connected to the cavity, a small amount of flowing glue will flow into the exhaust channels to form blockages, so it is necessary to frequently remove the inserts for cleaning or replacement. However, the inserts are usually embedded in the mold, and the exhaust channels in the inserts are very narrow, making it difficult to directly remove them from the mold.

[0003] For example, Chinese Patent Publication No. CN107718457A discloses an exhaust insert and an injection mold. The exhaust insert includes: a slider, which is provided with an installation hole in the horizontal direction, and the front end of the slider forms a mating surface for closely adhering to the outer surface around the piercing hole of the injection molded part; an insert pin, which is arranged in the installation hole, and the front end of the insert pin extends out of the slider and is used for inserting into the piercing hole of the injection molded part to form a piercing position. The insert pin and the installation hole are in clearance fit so as to form an exhaust channel between the insert pin and the slider, and the exhaust channel is used for exhausting air when cold glue is formed during injection molding. An exhaust channel is formed between the insert pin and the slider. The extended section of the insert pin is inserted into the piercing hole of the injection molded part during injection molding and forms a piercing position. During injection molding, the plastic flows into the exhaust channel and can be exhausted through the exhaust channel after cold glue is formed. The appearance surface of the injection molded product does not generate burrs, and the yield rate is high.

[0004] The positioning of the insert pin in this application is realized by a positioning screw and several disc springs. The disassembly and assembly of the insert pin are very troublesome. It is necessary to remove the positioning screw with a tool and then sequentially remove several disc springs. Moreover, it is also relatively troublesome to remove the insert pin from the narrow installation hole, and there are certain limitations in use.

[0005] Therefore, it is necessary to provide an efficient exhaust device for a plastic mold to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an efficient exhaust device for a plastic mold to solve the problems raised in the above background art.

[0007] To achieve the above purpose, an efficient exhaust device for a plastic mold with an insert pin that can be quickly and automatically disassembled and assembled is designed.

[0008] Based on the above ideas, the present invention provides the following technical solutions: An efficient exhaust device for a plastic mold, including a lower mold and an upper mold. A dowel pin for exhaust and designed in a cylindrical shape is arranged inside the lower mold. A base is fixedly installed on the side wall of the lower mold. An adjusting component is jointly arranged between the base and the upper mold. A supporting component that abuts against the dowel pin is rotatably installed on the adjusting component. A limiting component that is movably attached to the supporting component is arranged inside the dowel pin. When the lower mold and the upper mold are closed, the adjusting component can drive the supporting component and the dowel pin to move into the lower mold. When the lower mold and the upper mold are separated, the adjusting component can drive the supporting component and the dowel pin to move out of the lower mold.

[0009] As a further solution of the present invention: The limiting component includes a slider slidably installed inside the dowel pin. A second spring is jointly fixedly installed between the surface of the slider close to the supporting component and the inner wall of the dowel pin. The second spring makes the slider tend to move in a direction away from the supporting component.

[0010] As a further solution of the present invention: An installation groove for placing the slider, the second spring, and the supporting component is opened at the end of the dowel pin. The installation groove is designed in a side U shape and the opening of the U shape points in the direction of the supporting component.

[0011] As a further solution of the present invention: The supporting component includes a cross bar. One end of the cross bar is rotatably matched with the adjusting component, and the other end is inserted into the installation groove and abuts against the installation groove. A clamping block that abuts against the slider is elastically connected to the outer surface of the cross bar through a first spring. The first spring makes the clamping block tend to slide out of the outer surface of the cross bar.

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

[0013] As a further solution of the present invention: The adjusting component includes a round sleeve rotatably installed on the base and a rack fixedly connected to the upper mold. A first gear corresponding to the position of the rack is fixedly installed on the outer surface of the round sleeve. A screw rod that is rotatably matched with one end of the cross bar is threadedly connected inside the round sleeve.

[0014] As a further solution of the present invention: A rotating component is jointly arranged between the rack and the cross bar. When the rack drives the rotating component to move, it can first drive the round sleeve to rotate through the first gear, and then drive the cross bar and the dowel pin to rotate through the rotating component.

[0015] As a further solution of the present invention: The rotating component includes a second gear fixedly installed on the outer surface of the cross bar and two side plates fixedly connected to the rack. Tooth segments corresponding to the position of the second gear are fixedly installed on the 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 arranged symmetrically and staggeredly, and one of the tooth segments is in a meshing state with the second gear; when the tooth segment on one of the side plates meshes with the second gear, the tooth segment on the other side plate is in a separated state from the second gear.

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

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation among the inlay needle, the adjustment assembly, the support assembly, the limit assembly, etc., the cylindrical inlay needle can be driven to move horizontally back and forth, and only horizontal movement is required to realize the rapid assembly of the inlay needle based on the lower mold. The corresponding disassembly and assembly of the inlay needle are realized by using the mold closing process of the upper mold and the lower mold. When the mold is closed, the inlay needle can be automatically inserted into the lower mold to complete the assembly. When the mold is opened, the inlay needle can be automatically removed to complete the disassembly, which can effectively improve the overall disassembly and assembly efficiency of the inlay needle based on the lower mold and is convenient for effectively cleaning the outer surface of the inlay needle.

[0019] When the inlay needle needs to be replaced, only by pulling the inlay needle in the direction of the lower mold can the rapid disassembly of the inlay needle based on the support assembly be realized; when the inlay needle needs to be installed, align the inlay needle with the support assembly and insert it, and push the inlay needle in the direction of the support assembly until it abuts. Therefore, the disassembly and assembly of the inlay needle based on the support assembly are also very simple, which can effectively reduce the labor burden of workers and relatively improve the overall efficiency of injection molding processing, and has higher practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings and embodiments: Figure 1 is a three-dimensional view of the overall structure of the present invention; Figure 2 is a schematic view of the structure of the lower mold and the base of the present invention; Figure 3 is a schematic view of the structure of the screw, the cross bar and the inlay needle of the present invention; Figure 4 is a schematic view of the internal structure of the inlay needle of the present invention; Figure 5 is Figure 4 an enlarged view of the structure at A in Figure 6 is a schematic view of the structure of the rack and the rotating assembly of the present invention; Figure 7 is a schematic view of the structure of the second gear and the side plate of the present invention; Figure 8 is a schematic view of the structure of the side plate and the rack of the present invention; Figure 9Schematic diagram of the circular sleeve and the sleeve structure of the present invention; Figure 10 Schematic diagram of the circular sleeve and the insert pin structure of the present invention.

[0021] In the figure: 1, lower die; 2, upper die; 3, base; 4, adjusting component; 5, supporting component; 6, insert pin; 7, limiting component; 8, inclined surface; 9, rotating component; 10, sleeve; 101, circular hole; 401, circular sleeve; 402, rack; 403, screw; 404, first gear; 501, cross bar; 502, clamping block; 503, first spring; 601, placement groove; 701, slider; 702, second spring; 901, second gear; 902, side plate; 903, tooth section. Specific embodiments

[0022] Embodiment 1: Please refer to Figures 1 to 5 , an efficient exhaust device for a plastic mold provided by an embodiment of the present invention is mainly used to realize the rapid disassembly and assembly of the insert pin 6. The device includes a lower die 1 and an upper die 2 that are mutually adapted. An insert pin 6 for exhausting is arranged in the lower die 1. A base 3 is fixedly installed on the side wall of the lower die 1. An adjusting component 4 is jointly arranged between the base 3 and the upper die 2. A supporting component 5 that abuts against the insert pin 6 is rotatably installed at the end of the adjusting component 4 away from the base 3. A limiting component 7 that is movably attached to the supporting component 5 is arranged inside the insert pin 6.

[0023] When the upper die 2 approaches the lower die 1, the adjusting component 4 can drive the supporting component 5 and the insert pin 6 to move downward into the lower die 1, so that the insert pin 6 reaches the designated position in the lower die 1 (it can reach the cavity of the lower die 1); when the upper die 2 moves away from the lower die 1, the adjusting component 4 can drive the supporting component 5 and the insert pin 6 to completely move out of the lower die 1, thereby facilitating the rapid cleaning of the insert pin 6. At the same time, pulling the insert pin 6 in the direction of the lower die 1 can realize the rapid separation of the insert pin 6 from the supporting component 5, and further realize the rapid disassembly of the insert pin 6; during this process, the supporting component 5 can automatically remain stationary through the adjusting component 4 and the base 3.

[0024] In this embodiment, the insert pin 6 is integrally cylindrical. A circular hole 101 for placing the insert pin 6 is opened on the side wall of the corresponding lower die 1. The overall diameter of the circular hole 101 remains unchanged. The insert pin 6 can be directly inserted during installation. When the insert pin 6 enters the circular hole 101, an exhaust channel is automatically formed, and efficient exhaust is achieved through the exhaust channel. Among them, the upper die 2, the lower die 1, the insert pin 6, and the exhaust channel are all existing mature technologies and will not be described in detail here.

[0025] Refer to Figures 3 to 5, in this embodiment, preferably: the limiting component 7 includes a slider 701 slidably installed in the ejector pin 6. 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 ejector pin 6. The second spring 702 makes the slider 701 tend to move away from the support component 5, and the second spring 702 confines the slider 701 to the side away from the support component 5.

[0026] Correspondingly, an installation groove 601 for placing the slider 701, the second spring 702 and the support component 5 is formed at the end of the ejector pin 6. The cross-section of the installation groove 601 is integrally designed in a side U shape, and the opening of the U shape points in the direction of the support component 5. Among them, the second spring 702 is placed in the upper part of the installation groove 601, while the slider 701 is placed in the middle part and the upper part of the installation groove 601, and the support component 5 is placed in the lower part of the installation groove 601.

[0027] Refer to Figures 3 to 5 , in this embodiment, preferably: the support component 5 includes a cross bar 501. One end of the cross bar 501 is rotatably matched with the adjusting component 4, and the other end is inserted into the installation groove 601 and abuts against the groove wall of the installation groove 601. A clamping block 502 that abuts against the slider 701 is elastically connected to the outer surface of the cross bar 501 through a first spring 503. The first spring 503 makes the clamping block 502 tend to slide out of the outer surface of the cross bar 501.

[0028] Furthermore, inclined surfaces 8 are provided on the surfaces of both the slider 701 and the clamping block 502. Based on Figure 5 the perspective, the inclined surface 8 of the slider 701 is obliquely left and downward, and the inclined surface 8 of the clamping block 502 is obliquely right and downward, and their directions are opposite. When the cross bar 501 drives the clamping block 502 to move into the installation groove 601, the inclined surface 8 enables the clamping block 502 to automatically contract into the cross bar 501; when the cross bar 501 drives the clamping block 502 to contact the slider 701, the inclined surface 8 also enables the clamping block 502 to automatically contract into the cross bar 501; when the cross bar 501 drives the clamping block 502 to move out of the installation groove 601, the clamping block 502 can push the slider 701 to move in the same direction until the slider 701 abuts against the other side groove wall of the installation groove 601. At this time, the slider 701 can no longer move. If the cross bar 501 drives the clamping block 502 to move out of the installation groove 601 again, at this time the inclined surface 8 can also make the clamping block 502 automatically contract into the cross bar 501.

[0029] It should be noted that: when the ejector pin 6 and the cross bar 501 are normally assembled, the end of the cross bar 501 abuts against the groove wall of the installation groove 601 to achieve Figure 5The state shown. At this time, the clamping block 502 is located on the side of the slider 701 away from the second spring 702. The two form a fitting state and the clamping block 502 is in the extreme state of protruding 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 the abutting state between the end of the cross bar 501 and the placement groove 601.

[0030] Referring to Figures 2 to 4 , in this embodiment, preferably: the adjusting assembly 4 includes a circular sleeve 401 rotatably mounted on the base 3 and a rack 402 fixedly connected to the upper die 2. A first gear 404 corresponding to the position of the rack 402 is fixedly mounted on the outer surface of the circular sleeve 401. A screw rod 403 that is rotationally matched with one end of the cross bar 501 is threadedly connected inside the circular sleeve 401. When the upper die 2 approaches the lower die 1, the first gear 404 and the circular sleeve 401 can be driven to rotate through the rack 402, so that the screw rod 403 approaches the lower die 1, and the cross bar 501 and the insert pin 6 move into the circular hole 101.

[0031] During use, first, the insert pin 6 is sleeved outside the cross bar 501 and the end of the cross bar 501 abuts against the placement groove 601. Then the upper die 2 approaches the lower die 1 and drives the rack 402 to move synchronously. The rack 402 drives the cross bar 501 and the insert pin 6 to move into the circular hole 101 through the first gear 404, the circular sleeve 401 and the screw rod 403, so that the insert pin 6 reaches the designated position inside the lower die 1. At this time, the upper die 2 and the lower die 1 are closed to carry out injection molding processing, and efficient exhaust can be realized through the exhaust channel formed by the insert pin 6 and the circular hole 101.

[0032] After the 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 drives the cross bar 501 and the insert pin 6 to move out of the circular hole 101 through the first gear 404, the circular sleeve 401 and the screw rod 403. At this time, rapid and thorough cleaning of the outer surface of the insert pin 6 can be realized. When the insert pin 6 is pulled towards the lower die 1, the clamping block 502 can drive the slider 701 to move towards the cross bar 501 and finally fit with the other side of the placement groove 601 (the cross bar 501 is limited by the screw rod 403). At this time, the slider 701 can no longer move and the clamping block 502 will contract into the cross bar 501, thereby realizing the rapid separation of the insert pin 6 and the cross bar 501.

[0033] In summary, through the cooperation of structures such as the insert pin 6, the cross bar 501, the screw rod 403, and the round sleeve 401, the cylindrical insert pin 6 can perform horizontal reciprocating movement, and the rapid assembly of the insert pin 6 based on the round hole 101 can be achieved only by horizontal movement. Moreover, the corresponding disassembly and assembly of the insert pin 6 are realized by using the mold closing process of the upper mold 2 and the lower mold 1. When the mold is closed, the insert pin 6 can be automatically inserted into the round hole 101 to complete the assembly. When the mold is opened, the insert pin 6 can be automatically removed to complete the disassembly. There is no need to align the insert pin 6 with the round hole 101, which can effectively improve the overall disassembly and assembly efficiency of the insert pin 6 based on the lower mold 1 and facilitate the effective cleaning of the outer surface of the insert pin 6.

[0034] When the insert pin 6 needs to be replaced, since the cross bar 501 is limited by the screw rod 403, only by pulling the insert pin 6 in the direction of the lower mold 1, the rapid disassembly of the insert pin 6 based on the cross bar 501 can be realized; when the insert pin 6 needs to be installed, align the placement groove 601 with the cross bar 501 and insert it, and push the insert pin 6 in the direction of the cross bar 501 until the end of the cross bar 501 abuts against the placement groove 601. Therefore, the disassembly and assembly of the insert pin 6 based on the cross bar 501 are also very simple, which can effectively reduce the labor burden of workers and relatively improve the overall efficiency of injection molding processing, and has higher practicality.

[0035] Embodiment 2: Please refer to Figures 1 to 8 , on the basis of Embodiment 1, considering that during injection molding processing, the insert pin 6 may form a certain adhesion with the injection molded part due to glue flow. If the screw rod 403 directly drives the insert pin 6 to move out of the round hole 101 through the cross bar 501, the resistance formed by the adhesion may affect the movement out of the insert pin 6, and then there may be a situation where the cross bar 501 moves outward while the insert pin 6 cannot move outward synchronously with the cross bar 501, affecting the automatic movement out of the insert pin 6 from the lower mold 1.

[0036] For this reason, a rotating assembly 9 is jointly arranged between the rack 402 and the cross bar 501. When the rack 402 descends with the upper mold 2, it will first drive the insert pin 6 to move to a specified position through the first gear 404, the screw rod 403, and the cross bar 501. Then the upper mold 2 will continue to drive the rack 402 to continue descending. At this time, the rack 402 is separated from the first gear 404, so that the first gear 404 no longer rotates, and the insert pin 6 will no longer move horizontally. Instead, the rack 402 drives the cross bar 501 to reciprocate and deflect at a small angle through the rotating assembly 9, and the cross bar 501 drives the insert pin 6 to deflect synchronously through the block 502 and the placement groove 601.

[0037] Correspondingly, when the upper mold 2 is opened, the rack 402 can first drive the insert pin 6 to reciprocate and deflect at a small angle through the rotating assembly 9 to separate the insert pin 6 from the injection molded part, and then the rack 402 drives the insert pin 6 to move out of the round hole 101 through the first gear 404, the screw rod 403, and the cross bar 501.

[0038] It should be noted that in this embodiment, when the insert pin 6 reaches the specified position along the round hole 101, the upper mold 2 and the lower mold 1 will reach the fully closed mold state, so that the upper mold 2 can still drive the rotating assembly 9 to move through the rack 402. However, at this time, the rack 402 is separated from the first gear 404, so that the insert pin 6 no longer moves.

[0039] Referring to Figures 6 to 8 , in this embodiment, preferably, the rotating assembly 9 includes a second gear 901 fixedly installed on the outer surface of the cross bar 501 and two side plates 902 fixedly connected to the rack 402. Tooth segments 903 corresponding to the position of the second gear 901 are fixedly installed on the opposite sides of the two side plates 902. The tooth segments 903 on the two side plates 902 are arranged symmetrically and staggeredly, and one of the tooth segments 903 is in meshing engagement with the second gear 901. When the tooth segment 903 on one of the side plates 902 is in meshing engagement with the second gear 901, the tooth segment 903 on the other side plate 902 is in a separated state from the second gear 901. Therefore, when the tooth segments 903 on both sides come into contact with the second gear 901, they can drive the second gear 901 to reciprocate and deflect at a small angle in sequence, and the tooth segments 903 on both sides do not interfere with each other.

[0040] Among them, the side plate 902 needs to be set with a certain length along the axial direction of the cross bar 501 (greater than the length of the second gear 901 along the axial direction of the cross bar 501), so that when the cross bar 501 moves along with the screw rod 403, the tooth segment 903 can always remain in meshing engagement with the second gear 901; a longer angle is not shown in this embodiment. Through the meshing setting of the tooth segment 903 and the second gear 901, the rotation of the cross bar 501 and the insert pin 6 can be limited, and further, the arbitrary rotation of the insert pin 6 is avoided.

[0041] In the above structure, in combination with Figure 8 , the tooth segments 903 on the two side plates 902 and the teeth on the rack 402 are vertically offset, so that the tooth segment 903 first drives the insert pin 6 to rotate through the second gear 901, and then the rack 402 drives the insert pin 6 to translate through the first gear 404.

[0042] During use, through structures such as the insert pin 6, the cross bar 501, and the round sleeve 401, the quick disassembly and assembly of the insert pin 6 based on the lower die 1 and the cross bar 501 can be achieved. The working process and effect of this part are the same as those in the first embodiment and will not be repeated here. The difference is that when the mold is closed, the rack 402 can first contact the first gear 404, and then the insert pin 6 can be driven by the round sleeve 401, the screw 403, and the cross bar 501 to move downward into the lower die 1 to a specified position. Then the mold closing continues, and the tooth segments 903 on both sides contact the second gear 901 in sequence, causing the cross bar 501 and the insert pin 6 to reciprocate and deflect at a small angle. When the mold is opened, the tooth segment 903 contacts the second gear 901, which can first drive the insert pin 6 to reciprocate and deflect at a small angle, separating the insert pin 6 from the injection molded part. Then the rack 402 contacts the first gear 404, causing the insert pin 6 to move out of the round hole 101.

[0043] Compared with the first embodiment, through the cooperation of structures such as the cross bar 501, the rack 402, the side plate 902, and the second gear 901, the insert pin 6 can be driven to reciprocate and deflect at a small angle before the insert pin 6 moves out, separating the insert pin 6 from the injection molded part to avoid adhesion, ensuring that the insert pin 6 can move outward synchronously with the cross bar 501, and further ensuring the smooth removal of the insert pin 6 based on the lower die 1. At the same time, the small-angle deflection can also reduce the damage to the injection molded part and ensure the reliable quality of the injection molded part. The overall solution is combined with the settings of the cross bar 501 and the rack 402, and the settings of the tooth segment 903 and the second gear 901 are also beneficial for the rotational limit of the cross bar 501 and the insert pin 6, avoiding the arbitrary self-rotation of the insert pin 6, and having stronger applicability.

[0044] Embodiment Three: Please refer to Figures 1 to 10 , based on the second embodiment, considering the settings of the base 3, the rack 402, and the side plate 902, the disassembly space of the insert pin 6 based on the lower die 1 is very limited, making it inconvenient for the staff to hold the insert pin 6 and pull the insert pin 6, and there are still certain limitations in use.

[0045] Therefore, the round sleeve 401 and the second gear 901 are improved: at this time, a sleeve 10 is fixedly installed on the surface of the round sleeve 401 close to the lower die 1. The sleeve 10 corresponds to the insert 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 inside of the sleeve 10.

[0046] When the screw 403 rotates to drive the cross bar 501 and the insert pin 6 to move out of the round hole 101, a part of the cross bar 501 and the second gear 901 can enter the inside of the sleeve 10, and finally the end of the sleeve 10 can abut against the end of the insert pin 6. At this time, if the screw 403 drives the cross bar 501 to continue to move towards the round sleeve 401, the sleeve 10 can push the insert pin 6 to move away from the cross bar 501, thereby releasing the limit between the insert pin 6 and the cross bar 501.

[0047] Furthermore, opposite magnetic poles (not shown in the figure) can be jointly provided at the relative ends of the sleeve 10 and the insert pin 6, so that after the sleeve 10 and the insert pin 6 are fitted together, effective adsorption is formed through the magnetic poles, which can not only prevent the insert pin 6 from falling off, but also form relative fixation after the insert pin 6 is replaced. When the screw 403 drives the cross bar 501 to approach the lower die 1, the insert pin 6 is adsorbed by the sleeve 10 and will not move synchronously immediately. When the cross bar 501 is inserted into the placement groove 601 and abuts against it, the movement of the screw 403 driving the cross bar 501 will cause the insert pin 6 to move synchronously with the cross bar 501.

[0048] During use, through structures such as the insert pin 6, the cross bar 501, and the round sleeve 401, the quick disassembly and assembly of the insert pin 6 based on the lower die 1 and the cross bar 501 can be realized; through structures such as the cross bar 501, the rack 402, and the second gear 901, the insert pin 6 can be driven to reciprocate and deflect at a small angle before the insert pin 6 is removed, so that the insert pin 6 is separated from the injection molded part to avoid adhesion. The working process and effect of this part are the same as those in Embodiment 2 and will not be repeated here. The difference is that when the rack 402 and the first gear 404 drive the insert pin 6 to move out of the lower die 1, the cross bar 501 and the second gear 901 can successively enter the sleeve 10 until the end of the sleeve 10 abuts against the end of the insert pin 6. Then, when the contact screw 403 drives the cross bar 501 and the insert pin 6 to continue moving, the insert pin 6 moves away from the cross bar 501 and the limit is released. At this time, holding the insert pin 6 can quickly realize disassembly without pulling the insert pin 6 downward in the direction of the lower die 1 relative to the cross bar 501.

[0049] Compared with Embodiment 2, through the cooperation of structures such as the cross bar 501, the sleeve 10, the insert pin 6, and the magnetic poles, the limit between the insert pin 6 and the cross bar 501 can be automatically released after the insert pin 6 is removed, which is convenient for quickly removing the insert pin 6; when installing the insert pin 6, it only needs to be fitted with the sleeve 10 through the magnetic poles, which can further simplify the disassembly and assembly steps of the insert pin 6 and reduce the influence of structures such as the side plate 902 on the removal of the insert pin 6. The overall solution is combined with the setting of the round sleeve 401. When the insert pin 6 is disassembled, it does not need to move in the direction of the lower die 1, which can further reduce the burden and improve the overall efficiency, meeting more requirements in actual use.

Claims

1. An efficient exhaust device for a plastic mold, comprising a lower mold and an upper mold, characterized in that, A dowel pin for exhausting air and designed in a cylindrical shape is arranged inside the lower die. A base is fixedly installed on the side wall of the lower die. An adjusting component is jointly arranged between the base and the upper die. A supporting component that abuts against the dowel pin is rotatably installed on the adjusting component. A limiting component that is movably attached to the supporting component is arranged inside the dowel pin. When the lower die and the upper die are closed, the adjusting component can drive the supporting component and the dowel pin to move into the lower die. When the lower die and the upper die are separated, the adjusting component can drive the supporting component and the dowel pin to move out of the lower die.

2. The high-efficiency exhaust device for plastic molds according to claim 1, wherein The limiting component includes a slider slidably installed inside the dowel pin. A second spring is jointly fixedly installed between the surface of the slider close to the supporting component and the inner wall of the dowel pin. The second spring makes the slider tend to move away from the supporting component.

3. The high-efficiency exhaust device for plastic molds according to claim 2, characterized in that, An installation groove for placing the slider, the second spring and the supporting component is formed at the end of the dowel pin. The installation groove is designed in a side U shape and the opening of the U shape points towards the direction of the supporting component.

4. The high-efficiency exhaust device for plastic molds according to claim 3, characterized in that, The supporting component includes a cross bar. One end of the cross bar is rotatably matched with the adjusting component, and the other end is inserted into the installation groove and abuts against the installation groove. A clamping block that abuts against the slider is elastically connected to the outer surface of the cross bar through a first spring. The first spring makes the clamping block tend to slide out of the outer surface of the cross bar.

5. The high-efficiency exhaust device for plastic molds according to claim 4, characterized in that, Bevels are arranged on the surfaces of both the slider and the clamping block, and the bevels of the slider and the clamping block point in opposite directions. When the cross bar drives the clamping block to move out of the installation groove, the clamping block can push the slider to move in the same direction and compress the spring until the slider abuts against the other side wall of the installation groove.

6. The high-efficiency exhaust device for plastic molds according to claim 4, characterized in that, The adjusting component includes a round sleeve rotatably installed on the base and a rack fixedly connected to the upper die. A first gear corresponding to the position of the rack is fixedly installed on the outer surface of the round sleeve. A screw rod that is rotatably matched with one end of the cross bar is threadedly connected inside the round sleeve.

7. The high-efficiency exhaust device for plastic molds according to claim 6, characterized in that, A rotating component is jointly arranged between the rack and the cross bar. When the rack drives the rotating component to move, the round sleeve can be driven to rotate through the first gear first, and then the cross bar and the dowel pin can be driven to rotate through the rotating component.

8. The high-efficiency exhaust device for plastic molds according to claim 7, characterized in that, The rotating component includes a second gear fixedly installed on the outer surface of the cross bar and two side plates fixedly connected to the rack. Tooth segments corresponding to the position of the second gear are fixedly installed on the opposite sides of the two side plates.

9. The high-efficiency exhaust device for plastic molds according to claim 8, wherein, The tooth segments on the two side plates are arranged symmetrically and staggeredly, and one of the tooth segments is in a meshing state with the second gear. When one of the tooth segments on the side plate is meshed with the second gear, the other tooth segment on the side plate is in a separated state from the second gear.

10. The high-efficiency exhaust device for plastic molds according to claim 8, characterized in that, The length dimension of the side plate in the axial direction of the cross bar is greater than the length dimension of the second gear in the axial direction of the cross bar, so that when the cross bar moves along with the screw rod, the tooth segment can always be in a meshing state with the second gear.

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