Hot runner system for injection molding

Abstract

The invention discloses a hot runner system for injection molding, and relates to the technical field of hot runner injection molding, the hot runner system comprises a static mold, movable molds, a hot runner opening, a filling opening and an injection opening, and mounting grooves are formed in the side walls, facing the static mold, of the two movable molds. During mold closing, a moving plate in a mounting groove extends into a fixing groove, a driving gear and a range extending toothed plate drive a sliding rod to move and stretch a first spring to store force, a second spring and a clamping block are locked in a matched mode after the driving gear and the range extending toothed plate completely extend into the sliding rod, automatic and efficient mold changing is achieved, and meanwhile during mold changing, an auxiliary rod is pulled with one hand to enable the smooth face of an abutting block to be separated from the sliding block; in addition, in the mold closing process, a trigger rod is pressed, a fixing block and a sliding column are in linkage to enable a double-attaching ring to tightly wrap the connecting position of an injection opening and a pouring opening, a sealing gap caused by thermal expansion and vibration is eliminated, the forming yield is guaranteed, and the mold closing efficiency is improved. The mold changing efficiency and the operation safety are obviously improved, and the stability and reliability of the injection molding process are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of hot runner injection molding, in particular to a hot runner system for injection molding. Background Art

[0002] At present, plastic molding molds generally include static molds and dynamic molds. The static mold is provided with a flow channel for liquid plastic to flow through, and a cavity connected to the flow channel, while the dynamic mold is provided with a core. When the dynamic mold abuts against the static mold, an injection cavity is formed between the core and the cavity. The liquid plastic is injected into the flow channel by an injection molding machine, and then transported to the injection cavity through the flow channel. The injection cavity is then cooled to solidify the plastic into the desired product shape, and then the static mold and the dynamic mold are driven to separate, and finally the molded product is ejected from the injection cavity by the ejector pin to complete the product production. A hot runner refers to a mold that uses a heating device to prevent the melt in the flow channel from solidifying. Compared with traditional molds, hot runner molds have a shorter molding cycle and save more raw materials.

[0003] For example, Chinese patent CN116834211A discloses a hot runner injection mold with an inclined gate. It can be seen that under the action of the first spring, the connection between the mold plate and the pouring plate can be tightened, so that the pouring port and the injection port can fit tightly, avoiding the problem of material leakage caused by gaps at the connection between the pouring port and the injection port.

[0004] However, the above patents still have the following shortcomings: In actual use, this patent requires first aligning the injection port on the mold plate with the injection port on the injection plate, and then manually pulling out the telescopic plates on the two mold plates to stretch and store force for the first spring. It is also necessary to manually press the two limiting blocks on the telescopic plates while keeping the telescopic plates pulled out, and finally put each telescopic plate into each corresponding limiting groove to complete the connection, which makes the entire mold changing process more cumbersome, with too many manual operation steps. Multi-step manual operation depends on the operator's proficiency, and it is easy for the telescopic plates to be stretched unevenly or the limiting blocks to not be properly connected, resulting in low efficiency in mold replacement. When disassembling the mold, both hands are required to push the two push rods inward from both sides of the mold to unlock it, which may cause the operator's body to be close to the mold machine and unable to operate separately, posing potential operational risks. Summary of the invention

[0005] The object of the present invention is to provide a hot runner system for injection molding to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a hot runner system for injection molding, comprising a static mold, a dynamic mold, a hot runner port, a pouring port, and an injection port, wherein a mounting groove is provided on one side wall of the two dynamic molds facing the static mold, and a fixing groove is provided on both side walls of the static mold; An automatic tensioning component is arranged inside the installation groove to automatically complete the stretching and fixing operations during mold clamping, reducing manual intervention; A convenient unlocking component is arranged inside the installation groove to be able to unlock and hold the moving mold with one hand during mold change without the need for both hands to operate simultaneously; On both side walls of the stationary mold, wrapping and leak-proof components are arranged at equal distances to automatically squeeze and wrap the connection between the pouring port and the injection port during mold clamping, reducing the risk of leakage.

[0007] Preferably, the automatic tensioning component includes a moving plate, and one end of the moving plate is fixedly connected to the inner wall of the installation groove. One end of the moving plate facing the fixed groove is rotatably connected to a driving gear, and an extended tooth plate is fixedly connected to the inner wall of the fixed groove corresponding to the driving gear. The bottom side of the driving gear is meshed and matched with the extended tooth plate. A support rod is fixedly connected to the inner wall of the installation groove, and a sliding rod is slidably attached to the outer wall of the support rod. The bottom of the sliding rod is meshed and matched with the top side of the driving gear, and one end of the sliding rod away from the fixed groove is fixedly connected to a first spring. The other end of the first spring is fixedly connected to the inner wall of the installation groove. On the side walls of the two sliding rods away from each other, sliding grooves are formed, and sliders are slidably attached to the inner walls of the sliding grooves.

[0008] Preferably, grooves are formed on the side walls of the two sliders away from each other, and second springs are fixedly connected to the inner walls of the grooves. One end of each of the two second springs away from each other is fixedly connected to a clamping block, and the outer wall of the clamping block is slidably attached to the inner wall of the groove. The side walls of the two clamping blocks away from each other are inclined corresponding to the fixed groove. The clamping block and the groove form a telescopic structure through the second spring, and clamping grooves are formed on the inner wall of the fixed groove corresponding to the clamping block.

[0009] Preferably, the convenient unlocking component includes a pressing block. A pressing groove is formed on the inner wall of the sliding groove corresponding to the pressing block, and the outer wall of the pressing block is slidably attached to the inner wall of the pressing groove. Guide inclined grooves are formed on the side walls of the two pressing blocks away from each other. Springs three are fixedly connected to the four corners of the side walls of the two sliders close to each other, and the other ends of the springs three are fixedly connected to the inner wall of the sliding groove. Through holes are formed through the top of the sliding rod, and auxiliary rods are slidably connected to the inner walls of the through holes. The bottom of the auxiliary rod is fixedly connected to the top of the pressing block.

[0010] Preferably, a through groove is formed on the top of the stationary mold corresponding to the penetration of the auxiliary rod.

[0011] Preferably, the package leakage prevention component includes two fitting rings. Fixed rods are slidably connected to the inner parts of the upper and lower ends of the two fitting rings, and support plates are fixedly connected to both ends of the fixed rods. One end of the support plate is fixedly connected to one side wall of the static mold. A fourth spring is fitted on the outer wall of the fixed rod, and both ends of the fourth spring are fixedly connected to the inner walls of the upper and lower ends of the two fitting rings respectively. Trigger rods are hinged to the outer walls of the two fitting rings away from each other, and fixing blocks are arranged on the outer walls of the trigger rods. The same end parts of the two fixing blocks are fixedly connected to one side wall of the static mold.

[0012] Preferably, first limiting grooves are penetrated through the outer walls of both sides of the fixing block corresponding to the trigger rod, and the outer wall of the trigger rod is in sliding fit with the inner walls of the first limiting grooves. Rubber pads are fixedly connected to the inner walls of the two fitting rings close to each other.

[0013] Preferably, second limiting grooves are penetrated through the upper and lower side walls of the fixing block, sliding columns are fixedly connected to the upper and lower side walls of the trigger rod corresponding to the second limiting grooves, and the outer walls of the sliding columns are in sliding fit with the inner walls of the second limiting grooves.

[0014] Preferably, the moving mold is installed on both sides of the static mold. The hot runner opening is arranged on the front side of the static mold, and the hot runner opening is inclined. The pouring port is arranged obliquely corresponding to the hot runner opening on both sides of the static mold. The injection port is arranged obliquely corresponding to the pouring port on the side where the two moving molds are close to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Then, after the mold is closed, the heating coil in the hot runner opening is turned on. The liquid plastic is poured into the hot runner opening on the front side of the static mold through an injection molding machine, so that the material enters the mold cavity of the moving mold through the pouring port and the injection port. Then, the injection cavity is cooled to make the plastic solidify into the required product shape. Then, the static mold and the moving mold are driven to separate, and finally the formed product is taken out of the injection cavity to complete the production of the product.

[0016] 2. During the use of the injection mold, the moving plate in the installation groove can be synchronously driven to extend into the fixed groove when the mold is closed. Under the cooperation of the driving gear and the extended tooth plate, the sliding rod that moves synchronously can be further driven to move, so as to automatically stretch and store energy for the first spring during the extension process. At the same time, when it is fully extended, through the cooperation of the second spring and the clamping block, the tension storage and fixing operations can be automatically completed after the mold is closed, so as to reduce manual intervention, simplify the replacement process, improve the operation consistency, and thus be beneficial to improving the mold replacement efficiency of the hot runner injection mold.

[0017] 3. During the use of the injection mold, when it is necessary to replace the mold, one hand can sequentially pull the auxiliary rod outwards, so that the smooth surface on one side of the pressing block is separated from one side of the slider. Thus, under the action of the third spring, the slider is automatically driven to contract into the sliding groove, completing the unlocking of the mold. At the same time, the unlocking state of the auxiliary rod is maintained, without the need for both hands to operate simultaneously, improving the convenience of mold replacement and being conducive to ensuring the safety during mold replacement of this hot runner injection mold.

[0018] 4. During the use of the injection mold, the trigger rod can be squeezed during the mold closing process. Thus, under the cooperation of the fixed block and the sliding column, the two fitting rings approach each other, so as to automatically squeeze and wrap the connection between the perfusion port and the injection port after mold closing, avoiding the sealing gap caused by thermal expansion or mechanical vibration during the injection process, reducing the leakage risk, and thus being conducive to improving the product yield of this hot runner injection mold. Brief Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram inside the installation groove and the fixed groove of the whole of the present invention; Figure 3 is the partial structural schematic diagram of the whole of the present invention; Figure 4 is the structural schematic diagram of the first part of the automatic tensioning component of the present invention; Figure 5 is the structural schematic diagram of the second part of the automatic tensioning component of the present invention; Figure 6 is the structural schematic diagram of the convenient unlocking component of the present invention; Figure 7 is the structural schematic diagram of the wrapping leak-proof component of the present invention.

[0020] In the figure: 1, stationary mold; 2, installation groove; 3, fixed groove; 7, pressing groove; 8, through hole; 9, through slot; 10, moving mold; 11, hot runner port; 12, perfusion port; 13, injection port; 4, automatic tensioning component; 401, moving plate; 402, driving gear; 403, extended tooth plate; 404, support rod; 405, sliding rod; 406, first spring; 407, sliding groove; 408, slider; 409, groove; 410, second spring; 411, clamping block; 412, clamping slot; 5, convenient unlocking component; 501, pressing block; 502, guiding inclined slot; 503, third spring; 504, auxiliary rod; 6, wrapping leak-proof component; 601, fitting ring; 602, fixed rod; 603, support plate; 604, fourth spring; 605, trigger rod; 606, fixed block; 607, first limiting slot; 608, second limiting slot; 609, sliding column; 610, rubber pad. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1. Please refer to Figures 1-7 , the present invention provides a technical solution: a hot runner system for injection molding, including a stationary mold 1, a moving mold 10, a hot runner port 11, a pouring port 12, and an injection port 13. Installation grooves 2 are formed on one side wall of the two moving molds 10 facing the stationary mold 1, and fixing grooves 3 are correspondingly formed on both side walls of the stationary mold 1; An automatic tensioning component 4 is arranged inside the installation groove 2; Furthermore, the automatic tensioning component 4 includes a moving plate 401. One end of the moving plate 401 is fixedly connected to the inner wall of the installation groove 2. A driving gear 402 is rotatably connected to one end of the moving plate 401 facing the fixing groove 3. An extended tooth plate 403 is fixedly connected to the inner wall of the fixing groove 3 corresponding to the driving gear 402. The bottom side of the driving gear 402 is meshed and matched with the extended tooth plate 403. A support rod 404 is fixedly connected to the inner wall of the installation groove 2. A sliding rod 405 is slidably connected to the outer wall of the support rod 404 in a fitting manner. The bottom of the sliding rod 405 is meshed and matched with the top side of the driving gear 402. One end of the sliding rod 405 away from the fixing groove 3 is fixedly connected to a first spring 406. The other end of the first spring 406 is fixedly connected to the inner wall of the installation groove 2. Sliding grooves 407 are formed on the side walls of the two sliding rods 405 away from each other. Sliders 408 are slidably connected to the inner walls of the sliding grooves 407 in a fitting manner; More specifically, in the embodiment, when clamping the mold, first, the injection ports 13 of the two moving molds 10 are aligned with the pouring port 12 of the stationary mold 1 and pushed and combined. During the mold clamping process, one end of the moving plate 401 is fixedly connected to the inner wall of the installation groove 2, a driving gear 402 is rotatably connected to one end of the moving plate 401 facing the fixing groove 3, and an extended tooth plate 403 is fixedly connected to the inner wall of the fixing groove 3 corresponding to the driving gear 402. Therefore, during the process of the moving mold 10 being pushed towards the stationary mold 1, the moving plate 401 can be synchronously driven to move towards the fixing groove 3, so that the driving gear 402 contacts and meshes with the extended tooth plate 403 in the fixing groove 3, causing the driving gear 402 to roll; Then, during the movement of the movable plate 401, the support rod 404 is fixedly connected to the inner wall of the mounting groove 2, and the outer wall of the support rod 404 is slidably connected to the slide rod 405, and the bottom of the slide rod 405 is meshed and matched with the top side of the driving gear 402, and at the same time, the end of the slide rod 405 away from the fixed groove 3 is fixedly connected to the spring 1 406, and the other end of the spring 1 406 is fixedly connected to the inner wall of the mounting groove 2, so that under normal circumstances, the slide rod 405 moves synchronously with the movable plate 401, and when the driving gear 402 is in contact and meshing with the range-increasing gear plate 403, the rotation of the driving gear 402 will drive the slide rod 405 to move further, that is, the slide rod 405 moves a greater distance relative to the movable plate 401, so that the spring 1 406 can be stretched and stored; Then, a sliding groove 407 is provided on one side wall away from the two slide bars 405, and a slider 408 is slidably connected to the inner wall of the sliding groove 407, and a groove 409 is provided on one side wall away from the two sliders 408, and a spring 2 410 is fixedly connected to the inner wall of the groove 409, and a clamping block 411 is fixedly connected to one end away from the two springs 2 410, and the outer wall of the clamping block 411 is slidably fitted with the inner wall of the groove 409, and the side wall away from the two clamping blocks 411 is inclined corresponding to the fixed groove 3, so that under normal circumstances, Under this circumstance, the clamping block 411 will synchronously move toward the fixed groove 3 of the static mold 1 during the movement of the movable mold 10, and can use the inclined surface of the clamping block 411 to squeeze into the fixed groove 3 and compress the spring 2 410, and then when the force is stored to the maximum state, the clamping block 411 will use the rebound of the spring 2 410 to be stuck in the clamping groove 412, so as to realize the automatic completion of the tensioning force storage and fixing operation after the mold is closed, thereby reducing manual intervention, simplifying the replacement process, and improving the consistency of operation, which is beneficial to improving the mold replacement efficiency of the hot runner injection mold.

[0023] Embodiment 2: Based on the above embodiment, a convenient unlocking component 5 is provided inside the mounting groove 2; Furthermore, the convenient unlocking component 5 includes a pressing block 501, and the inner wall of the sliding groove 407 corresponds to the pressing block 501. The pressing groove 7 is opened, and the outer wall of the pressing block 501 slides in contact with the inner wall of the pressing groove 7. A guiding inclined groove 502 is opened on the side wall where the two pressing blocks 501 are far away from each other, and the four corners of the side wall where the two sliding blocks 408 are close to each other are fixedly connected with spring three 503, and the other end of the spring three 503 is fixedly connected to the inner wall of the sliding groove 407, and a through hole 8 is opened on the top of the sliding rod 405, and the inner wall of the through hole 8 is slidably connected with an auxiliary rod 504, and the bottom of the auxiliary rod 504 is fixedly connected to the top of the pressing block 501; More specifically, in the embodiment, in order to avoid the potential risk of having to operate both hands synchronously and getting too close to the mold machine when disassembling the mold, a pressing groove 7 is provided on the inner wall of the sliding groove 407 corresponding to the pressing block 501, and the outer wall of the pressing block 501 is slidably fitted with the inner wall of the pressing groove 7. A guiding inclined groove 502 is provided on the side wall of the two pressing blocks 501 facing away from each other. At the same time, four corners of the side wall of the two sliders 408 close to each other are fixedly connected with a third spring 503, and the other end of the third spring 503 is fixedly connected to the inner wall of the sliding groove 407. A through hole 8 is provided through the top of the sliding rod 405, and an auxiliary rod 504 is slidably connected to the inner wall of the through hole 8. The bottom of the auxiliary rod 504 is fixedly connected to the top of the pressing block 501. Thus, in the normal installation state, the pressing block 501 is located in the sliding groove 407 at this time, and the remaining smooth surface of the pressing block 501 on the side where the guiding inclined groove 502 is provided is fitted with the side wall of the slider 408 away from the locking block 411. Under the elastic force of the four-corner third spring 503, the smooth surface of the pressing block 501 is in an extrusion state in contact with the side wall of the slider 408, giving the slider 408 a supporting effect, so that the locking block 411 and the clamping groove 412 can be fixed during its subsequent movement; When unlocking is required, at this time, only one hand needs to pull one of the auxiliary rods 504 outwards, so that the pressing block 501 disengages from the sliding groove 407 and returns to the pressing groove 7 again. At this time, under the rebound of the third spring 503, the slider 408 contracts into the sliding groove 407, so that the locking block 411 and the clamping groove 412 are in a disengaged state. At the same time, the unlocking state of the auxiliary rod 504 is maintained, and multiple auxiliary rods 504 can be pulled out one by one with one hand, which is simple and convenient. Similarly, when restoring, push the auxiliary rod 504 inwards, and the pressing block 501 can squeeze the side wall of the slider 408 by using the guiding inclined groove 502 to push the slider 408 out of the sliding groove 407 again, and the extended state of the slider 408 is maintained under the action of the smooth surface, without the need for both hands to operate simultaneously, improving the convenience of mold replacement and being beneficial to ensuring the safety during mold replacement of this hot runner injection mold; Then, a through groove 9 is provided corresponding to the penetration of the auxiliary rod 504 at the top of the stationary mold (1) for the smooth sliding of the auxiliary rod 504.

[0024] Embodiment 3, on the basis of the above embodiment, wrapping anti-leakage components 6 are equidistantly arranged on both side walls of the stationary mold 1; Further, the leak-proof package component 6 includes a fitting ring 601, and the upper and lower ends of the two fitting rings 601 are slidably connected to the inner parts of the fixing rods 602, and the two ends of the fixing rods 602 are fixedly connected to the support plates 603, and one end of the support plate 603 is fixedly connected to a side wall of the static mold 1, and the outer wall of the fixing rod 602 is fitted with a spring four 604, and the two ends of the spring four 604 are respectively fixedly connected to the upper and lower inner walls of the two fitting rings 601, and the outer wall of the two fitting rings 601 away from each other is hinged with a trigger rod 605, and the outer wall of the trigger rod 605 is provided with a fixing block 606, and the same end of the two fixing blocks 606 is fixedly connected to a side wall of the static mold 1; More specifically, in the embodiment, during the mold closing process, firstly, the upper and lower ends of the two fitting rings 601 are slidably connected to the fixing rods 602, and the two ends of the fixing rods 602 are fixedly connected to the supporting plates 603, and one end of the supporting plate 603 is fixedly connected to a side wall of the static mold 1, so that the two fitting rings 601 can be supported and restricted by the upper and lower fixing rods 602; Then, a trigger rod 605 is hingedly connected to the outer wall of one side away from the two fitting rings 601, and a fixing block 606 is arranged on the outer wall of the trigger rod 605, and the outer walls on both sides of the fixing block 606 are penetrated to form a limiting groove 1 607 corresponding to the trigger rod 605, and the outer wall of the trigger rod 605 and the inner wall of the limiting groove 1 607 fit and slide, and the upper and lower side walls of the fixing block 606 are penetrated to form a limiting groove 2 608, and the upper and lower side walls of the trigger rod 605 are fixedly connected to the sliding column 609 corresponding to the limiting groove 2 608, and the outer wall of the sliding column 609 fits and slides with the inner wall of the limiting groove 2 608, so that the movable mold 10 When moving in the direction of the static mold 1, the two trigger rods 605 can be squeezed. At this time, with the cooperation of the sliding column 609 and the limiting groove 608, the two trigger rods 605 will synchronously drive the two hinged fitting rings 601 to approach each other. At this time, a rubber pad 610 is fixedly connected to the inner wall of one side where the two fitting rings 601 are close to each other, so that the rubber pad 610 can be used to extrude and wrap the connection between the injection port 12 and the injection port 13 after the mold is closed, so as to avoid the sealing gap caused by thermal expansion or mechanical vibration during the injection process, reduce the risk of seepage, and thus help to improve the product yield of the hot runner injection mold.

[0025] Working principle: When closing the mold, first align and push the injection ports 13 of the two moving molds 10 with the perfusion port 12 of the stationary mold 1 to merge them. During the process of pushing the moving mold 10 towards the stationary mold 1, it can synchronously drive the moving plate 401 to move towards the fixed slot 3, so that the driving gear 402 contacts and meshes with the extended tooth plate 403 in the fixed slot 3, causing the driving gear 402 to roll. Under normal circumstances, the sliding rod 405 moves synchronously with the moving plate 401. When the driving gear 402 contacts and meshes with the extended tooth plate 403, as the driving gear 402 rotates, it will drive the sliding rod 405 to move further, that is, the sliding rod 405 moves a greater distance relative to the moving plate 401, so as to stretch and store energy for the first spring 406; Then under normal circumstances, the latch 411 will move towards the fixed slot 3 of the stationary mold 1 synchronously during the movement of the moving mold 10, and can use the inclined surface part of the latch 411 to squeeze into the fixed slot 3 and compress the second spring 410 accordingly. Then when the energy storage reaches the maximum state, at this time the latch 411 will use the rebound of the second spring 410 to snap into the card slot 412 to achieve the automatic completion of the tensioning energy storage and fixing operations after closing the mold; Then after closing the mold, turn on the heating coil in the hot runner port 11, and pour the liquid plastic into the hot runner port 11 on the front side of the stationary mold 1 through an injection molding machine, so that the material enters the mold cavity of the moving mold 10 through the perfusion port 12 and the injection port 13. Then cool the injection cavity to make the plastic solidify into the required product shape, then drive the stationary mold 1 and the moving mold 10 to separate, and finally take out the formed product from the injection cavity to complete the production of the product; When unlocking is required, at this time, just pull one of the auxiliary rods 504 outward with one hand, so that the pressing block 501 disengages from the sliding slot 407 and returns to the pressing slot 7 again. At this time, under the rebound of the third spring 503, the slider 408 shrinks into the sliding slot 407, so that the latch 411 and the card slot 412 are in a disengaged state. At the same time, keep the unlocking state of the auxiliary rod 504. You can pull out multiple auxiliary rods 504 in sequence with one hand, which is simple and convenient. Similarly, when restoring, push the auxiliary rod 504 inward, so that the pressing block 501 can squeeze the side wall of the slider 408 by using the guiding inclined slot 502 to push the slider 408 out of the sliding slot 407 again, and keep the extended state of the slider 408 under the action of the smooth surface. There is no need to operate with both hands at the same time, which improves the convenience of mold replacement and is beneficial to ensuring the safety of the mold replacement of this hot runner injection mold; Next, when the moving mold 10 moves towards the stationary mold 1, the two trigger rods 605 can be squeezed. At this time, under the cooperation of the sliding column 609 and the second limiting groove 608, the two trigger rods 605 will synchronously drive the two attached rings 601 hinged thereto to approach each other. At this time, rubber pads 610 are fixedly connected to the inner walls of the approaching sides of the two attached rings 601, so as to squeeze and wrap the connection between the pouring port 12 and the injection port 13 after mold closing, avoiding the sealing gap caused by thermal expansion or mechanical vibration during the injection molding process and reducing the risk of leakage.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot runner system for injection molding, comprising a static mold (1), a movable mold (10), a hot runner port (11), a pouring port (12), and an injection port (13), characterized in that: A mounting groove (2) is provided on one side wall of the two movable molds (10) facing the static mold (1), and fixing grooves (3) are correspondingly provided on two side walls of the static mold (1); An automatic tensioning component (4) is provided inside the installation groove (2) to automatically complete the stretching and fixing operations when the mold is closed; A convenient unlocking component (5) is provided inside the installation groove (2) so as to unlock and maintain the movable mold (10) with one hand; Wrapping anti-leakage components (6) are arranged at equal distances on both side walls of the static mold (1) to automatically extrude and wrap the connection between the pouring port (12) and the injection port (13).

2. A hot runner system for injection molding according to claim 1, characterized in that: The automatic tensioning component (4) comprises a movable plate (401), and one end of the movable plate (401) is fixedly connected to the inner wall of the mounting groove (2); the movable plate (401) is rotatably connected to one end of the fixed groove (3) with a driving gear (402); the inner wall of the fixed groove (3) is fixedly connected to an extended-range toothed plate (403) corresponding to the driving gear (402); the bottom side of the driving gear (402) is meshed and matched with the extended-range toothed plate (403); and the inner wall of the mounting groove (2) is fixedly connected to a support rod (404). , and the outer wall of the support rod (404) is slidably connected to a slide rod (405), the bottom of the slide rod (405) is meshed and matched with the top side of the driving gear (402), and one end of the slide rod (405) away from the fixing groove (3) is fixedly connected to a spring 1 (406), and the other end of the spring 1 (406) is fixedly connected to the inner wall of the installation groove (2), and a sliding groove (407) is provided on one side wall away from the two slide rods (405), and a slider (408) is slidably connected to the inner wall of the sliding groove (407).

3. A hot runner system for injection molding according to claim 2, characterized in that: A groove (409) is provided on a side wall of the two sliding blocks (408) that is away from each other, and a second spring (410) is fixedly connected to the inner wall of the groove (409); a clamping block (411) is fixedly connected to one end of the two second springs (410) that is away from each other, and the outer wall of the clamping block (411) slides in contact with the inner wall of the groove (409); a side wall of the two clamping blocks (411) that is away from each other is in an inclined shape corresponding to the fixed groove (3); the clamping block (411) and the groove (409) form a telescopic structure through the second spring (410); and a clamping groove (412) is provided on the inner wall of the fixed groove (3) corresponding to the clamping block (411).

4. A hot runner system for injection molding according to claim 3, characterized in that: The convenient unlocking component (5) comprises a pressing block (501), an inner wall of the sliding groove (407) is provided with a pressing groove (7) corresponding to the pressing block (501), and the outer wall of the pressing block (501) slides in contact with the inner wall of the pressing groove (7), a side wall of the two pressing blocks (501) that are separated from each other is provided with a guiding inclined groove (502), four corners of the side wall of the two sliding blocks (408) that are close to each other are fixedly connected with a spring three (503), and the other end of the spring three (503) is fixedly connected to the inner wall of the sliding groove (407), a through hole (8) is penetrated through the top of the sliding rod (405), and an auxiliary rod (504) is slidably connected to the inner wall of the through hole (8), and the bottom of the auxiliary rod (504) is fixedly connected to the top of the pressing block (501).

5. A hot runner system for injection molding according to claim 4, characterized in that: A through slot (9) is provided at the top of the static mold (1) corresponding to the auxiliary rod (504).

6. A hot runner system for injection molding according to claim 4, characterized in that: The wrapping anti-leakage component (6) comprises two fitting rings (601), the upper and lower ends of the two fitting rings (601) are slidably connected to fixed rods (602), and the two ends of the fixing rods (602) are fixedly connected to support plates (603), one end of the support plate (603) is fixedly connected to a side wall of the static mold (1), the outer wall of the fixing rod (602) is fitted with a spring four (604), and the two ends of the spring four (604) are respectively fixedly connected to the upper and lower inner walls of the two fitting rings (601), the outer wall of the two fitting rings (601) away from each other is hinged with a trigger rod (605), and the outer wall of the trigger rod (605) is provided with a fixing block (606), and the same end of the two fixing blocks (606) is fixedly connected to a side wall of the static mold (1).

7. A hot runner system for injection molding according to claim 6, characterized in that: The outer walls of both sides of the fixed block (606) are provided with limiting grooves (607) corresponding to the trigger rod (605), and the outer wall of the trigger rod (605) is fitted and slid with the inner wall of the limiting groove (607), and the inner wall of the side where the two fitting rings (601) are close to each other is fixedly connected with a rubber pad (610).

8. The hot runner system for injection molding according to claim 7, characterized in that: The upper and lower side walls of the fixed block (606) are penetrated by a second limiting groove (608), and the upper and lower side walls of the trigger rod (605) are fixedly connected with a sliding column (609) corresponding to the second limiting groove (608), and the outer wall of the sliding column (609) is slidably fitted with the inner wall of the second limiting groove (608).

9. The hot runner system for injection molding according to claim 1, characterized in that: The movable mold (10) is installed on both sides of the static mold (1); the hot runner port (11) is opened on the front side of the static mold (1), and the hot runner port (11) is opened at an angle; the pouring port (12) is arranged at an angle on both sides of the static mold (1) corresponding to the hot runner port (11); and the injection port (13) is arranged at an angle on the side close to the two movable molds (10) corresponding to the pouring port (12).

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