Glue sealing mechanism of mold

Abstract

The utility model discloses a glue sealing mechanism of a mold, the mold comprises an upper mold and a lower mold, the lower mold is provided with an injection molding cavity, the injection molding cavity comprises a guide rail cavity for accommodating a guide rail to be subjected to injection molding, and the glue sealing mechanism is embedded at one end of the guide rail cavity; the glue sealing mechanism comprises a first sliding assembly and a second sliding assembly; the first sliding assembly can be embedded in the guide rail cavity in a relatively sliding manner, and the first sliding assembly is used for abutting against the end face of a guide rail to be subjected to injection molding; the second sliding assembly can be embedded in the first sliding assembly in a relatively sliding mode, and at least part of the second sliding assembly protrudes out of the top face of the first sliding assembly, so that the upper die can push the second sliding assembly to slide relative to the first sliding assembly. By arranging the glue sealing mechanism, the injection molding gap between the guide rail to be subjected to injection molding and the end face of the guide rail cavity can be eliminated, and the product yield is ensured.

Description

Technical Field

[0001] This utility model relates to the field of profile injection molding, and in particular to a sealing mechanism for a mold. Background Technology

[0002] Vehicle windows with guide rails typically consist of a ferrule, glass, and guide rails. The connection between the glass and the guide rails is achieved through injection molding of the ferrule. However, the length of the guide rail can fluctuate within tolerance limits, leading to two possible scenarios during injection molding: First, when the guide rail length has a positive tolerance, interference occurs when it is placed into the mold, preventing it from fitting into the cavity. Second, when the guide rail length has a negative tolerance, a gap forms between the end face of the tolerance accumulation point along the guide rail's length and the inner wall of the mold cavity. This allows the plastic material to flow into the gap during injection, causing the sealant at the tolerance accumulation point of the guide rail to fail, resulting in defective products. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a sealing mechanism for a mold, which overcomes the defect that existing molds cannot adapt to guide rail tolerances.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A sealing mechanism for a mold, the mold including an upper mold and a lower mold, the lower mold having an injection cavity, the injection cavity including a guide cavity for accommodating a guide rail to be injected, the sealing mechanism being embedded at one end of the guide cavity;

[0006] The sealing mechanism includes a first sliding component and a second sliding component;

[0007] The first sliding component is slidably embedded in the guide rail cavity, and the first sliding component is used to press against the end face of the guide rail to be injected;

[0008] The second sliding component is slidably embedded in the first sliding component, and the second sliding component is at least partially protruding from the top surface of the first sliding component, so that the upper mold can push the second sliding component to slide relative to the first sliding component.

[0009] Furthermore, the first sliding component has a limiting end and a pressing end for pressing against the guide rail to be injection molded;

[0010] The second sliding assembly includes an adjusting member, an elastic member, and a locking member;

[0011] Along the length of the guide rail cavity, the adjusting member, the elastic member, and the locking member are arranged sequentially near the pressing end, and the adjusting member is slidably connected to the first sliding assembly;

[0012] The adjusting member can push the first sliding component to move in a direction close to the pressing end and compress the elastic member;

[0013] The adjusting member has a pushing part for pressing against the upper mold, the pushing part being disposed on the top of the first sliding assembly.

[0014] Furthermore, in the length direction of the guide rail cavity, the pushing part has a first locking surface for pressing against the upper mold;

[0015] In the vertical direction, the first locking surface gradually convexes outward and tilts in a direction away from the axis of the pusher.

[0016] Furthermore, the first sliding component has a first sliding cavity;

[0017] Along the length of the guide rail cavity, the first sliding cavity has a first limiting wall on the side near the pressing end of the first sliding assembly;

[0018] The adjusting member can press against the first limiting wall and push the first sliding component to press against the guide rail to be injected.

[0019] Furthermore, the second sliding component also includes a fastener;

[0020] In the vertical direction, the fastener passes through the adjusting member and connects to the first sliding assembly;

[0021] Along the length of the guide rail cavity, there is a gap between the inner wall of the adjusting member and the outer wall of the fastener.

[0022] Furthermore, the sealing mechanism also includes a limiting component;

[0023] The limiting component is embedded at one end of the guide rail cavity, and the limiting component surrounds and forms a movable cavity for the first sliding component to slide.

[0024] Along the length of the guide rail cavity, the pressing end of the first sliding component passes through the limiting component.

[0025] Furthermore, a reset component is embedded within the first sliding component;

[0026] Along the length of the guide rail cavity, one end of the reset member abuts against the inner wall of the limiting component, thereby pushing the first sliding component to move toward the side where the limiting end of the first sliding component is located.

[0027] Furthermore, the limiting component includes a limiting block and at least two symmetrically arranged pressure strips;

[0028] The limiting block and the pressure strip are respectively connected to the guide rail cavity;

[0029] One end of the pressure strip abuts against the limiting block and forms the movable cavity;

[0030] The movable cavity is distributed along the length of the guide rail cavity, and the first sliding component is embedded in the movable cavity.

[0031] Furthermore, the first sliding component includes a slider and a shovel base;

[0032] The shovel base is connected to one end of the slider;

[0033] Along the length of the guide rail cavity, the sealing end of the shovel base passes through the slider, and the sealing end of the shovel base has a sealing end face for contacting the guide rail to be injection molded.

[0034] Furthermore, the slider is provided with limiting channels distributed along the vertical direction;

[0035] The fixed end of the shovel base is embedded in the limiting channel, and the sealing end of the shovel base passes through the limiting channel.

[0036] In the vertical direction, the relative position between the fixed end of the shovel base and the limiting channel is adjustable.

[0037] The beneficial effects of this utility model are as follows: This utility model employs a sealing mechanism embedded at the end of the guide rail cavity. After the upper and lower molds are closed, the upper mold pushes the sealing mechanism to move, allowing the sealing mechanism to adaptively adjust and maintain a pressing relationship with the end face of the guide rail to be injected, thereby eliminating the gap between the guide rail to be injected and the guide rail cavity, ensuring the sealing effect of the edge during injection molding. Specifically, the second sliding component is used to press against the upper mold during the mold closing process. The upper mold, through the second sliding component, drives the first sliding component to move relative to the guide rail cavity, thus maintaining the first sliding component in a pressing state with the end face of the guide rail to be injected during injection molding. This prevents the adhesive (melted state of the edge) from flowing into the gap between the guide rail to be injected and the guide rail cavity during injection molding, ensuring the sealing effect and thus ensuring the product's pass rate. Furthermore, the sealing mechanism expands the length of the guide rail cavity, allowing it to be embedded in the cavity for injection molding even when the guide rail has positive tolerances. Attached Figure Description

[0038] Figure 1 This is a partial structural diagram of the mold and sealing mechanism in this utility model;

[0039] Figure 2 This is a partial structural schematic diagram of the sealing mechanism in this utility model;

[0040] Figure 3 This is a partial exploded view of the sealing mechanism in this utility model;

[0041] Figure 4 This is a partial cross-sectional view of the sealing mechanism in this utility model.

[0042] Label Explanation:

[0043] 100. Lower mold; 110. Injection cavity; 120. Guide rail cavity; 121. Positioning end; 122. Adjustment end;

[0044] 200. Guide rail to be injection molded;

[0045] 300. Sealing mechanism;

[0046] 310. First sliding assembly; 311. Limiting end; 312. Pressing end; 313. First sliding cavity; 314. First limiting wall; 315. Second limiting wall; 316. Slider; 317. Shovel base; 318. Limiting channel;

[0047] 320. Second sliding assembly; 321. Adjusting component; 322. Elastic component; 323. Locking component; 324. Pushing part; 325. First locking surface; 326. Second locking surface; 327. Fastener;

[0048] 330. Limiting component; 331. Movable cavity; 332. Limiting block; 333. Pressure strip;

[0049] 340. Reset component; 350. Limit bolt. Detailed Implementation

[0050] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0051] Please refer to Figures 1-4A sealing mechanism for a mold, the mold including an upper mold and a lower mold 100, the lower mold 100 having an injection cavity 110, the injection cavity 110 including a guide cavity 120 for accommodating a guide rail 200 to be injection molded, a sealing mechanism 300 being embedded in one end of the guide cavity 120; the sealing mechanism 300 including a first sliding component 310 and a second sliding component 320; the first sliding component 310 being slidably embedded in the guide cavity 120, the first sliding component 310 being used to abut against the end face of the guide rail 200 to be injection molded; the second sliding component 320 being slidably embedded in the first sliding component 310, and the second sliding component 320 being at least partially protruding from the top surface of the first sliding component 310, so that the upper mold can push the second sliding component 320 to slide relative to the first sliding component 310. The guide rail cavity 120 has a positioning end 121 and an adjusting end 122, wherein the positioning end 121 is used to press against and position the guide rail 200 to be injection molded, while the adjusting end 122 is used to accommodate the sealing mechanism 300. The first sliding assembly 310 has a limiting end 311 and a pressing end 312 for pressing against the guide rail 200 to be injection molded. In this invention, the sealing mechanism 300 is used to press against the guide rail 200 to be injection molded at the tolerance accumulation end of the guide rail 200.

[0052] It is worth noting that, in the unclosed state, the distance between the pressing end 312 of the first sliding component 310 and the positioning end 121 of the guide cavity 120 should be greater than or equal to the maximum positive tolerance of the guide length, so as to ensure that the guide 200 to be injected can be embedded in the guide cavity 120.

[0053] It is understood that this utility model employs a sealing mechanism 300 embedded at the end of the guide rail cavity 120. After the upper mold and lower mold 100 are closed, the upper mold pushes the sealing mechanism 300 to move, allowing the sealing mechanism 300 to adaptively adjust and maintain a pressing relationship with the end face of the guide rail 200 to be injected, thereby eliminating the gap between the guide rail 200 to be injected and the guide rail cavity 120, ensuring the sealing effect of the edge during the injection molding process. Specifically, the second sliding component 320 is used to press against the upper mold during the mold closing process of the upper mold and lower mold 100. The upper mold, through the second sliding component 320, drives the first sliding component 310 to move relative to the guide rail cavity 120, thereby maintaining the first sliding component 310 in a pressing state with the end face of the guide rail 200 to be injected during the injection molding process, preventing the adhesive (in a melted state during edge sealing) from flowing into the gap between the guide rail 200 to be injected and the guide rail cavity 120 during the injection molding process, ensuring the sealing effect. The sealing mechanism 300 expands the length of the guide cavity 120, allowing the guide rail 200 to be injection molded to be embedded in the guide cavity 120 for injection molding even when there is a positive tolerance.

[0054] In some embodiments, the second sliding assembly 320 includes an adjusting member 321, an elastic member 322, and a locking member 323. Along the length of the guide cavity 120, the adjusting member 321, the elastic member 322, and the locking member 323 are sequentially arranged near the pressing end 312, and the adjusting member 321 is slidably connected to the first sliding assembly 310. The adjusting member 321 can push the first sliding assembly 310 to move along the direction near the pressing end 312 and compress the elastic member 322. The adjusting member 321 has a pushing portion 324 for pressing against the upper mold, and the pushing portion 324 protrudes outward from the top of the first sliding assembly 310. By providing the adjusting member 321, the elastic member 322, and the locking member 323, the elastic member 322 is compressed when the upper mold presses against the pushing portion 324 of the adjusting member 321 during mold closing, thereby applying a supporting force to the first sliding assembly 310 and keeping the first sliding assembly 310 in a pressing state against the guide rail 200 to be injected. Preferably, the elastic element 322 is a compression spring and the locking element 323 is a bolt. Further, the elastic element 322 is a butterfly spring and the locking element 323 is a headless bolt.

[0055] In some embodiments, along the length of the guide cavity 120, the pushing part 324 has a first locking surface 325 for pressing against the upper mold; in the vertical direction, the first locking surface 325 gradually convexes outward and inclines away from the axis of the pushing part 324. The first locking surface 325 is provided to convert the vertical force into a horizontal force during the mold closing process of the upper mold and the lower mold 100, thereby pushing the first sliding component 310 to press against the end face of the guide rail 200 to be injected, thus avoiding the generation of injection gaps. Further, along the length of the guide cavity 120, the pushing part 324 has a second locking surface 326 symmetrically arranged with the first locking surface 325.

[0056] In some embodiments, the first sliding assembly 310 has a first sliding cavity 313; along the length of the guide rail cavity 120, the first sliding cavity 313 has a first limiting wall 314 on the side near the pressing end 312 of the first sliding assembly 310, and correspondingly, the first sliding cavity 313 has a second limiting wall 315 on the side away from the pressing end 312 of the first sliding assembly 310; the adjusting member 321 can press against the first limiting wall 314 and push the first sliding assembly 310 to press against the guide rail 200 to be injected. Under the action of the upper mold and the elastic member 322, the adjusting member 321 can reciprocate within the first sliding cavity 313 along the length of the guide rail cavity 120, which can ensure that the upper mold applies a horizontal force to the first sliding assembly 310 through the adjusting member 321, and also ensure that the adjusting member 321 resets after the external force is removed, so as to facilitate the next injection molding.

[0057] In some embodiments, the second sliding assembly 320 further includes a fastener 327; in the vertical direction, the fastener 327 passes through the adjusting member 321 and connects to the first sliding assembly 310; in the length direction of the guide cavity 120, there is a gap between the inner wall of the adjusting member 321 and the outer wall of the fastener 327. Preferably, the fastener 327 is a bolt or screw. By fastening, the adjusting member 321 is locked to the first sliding assembly 310, thereby restricting the degree of freedom of the adjusting member 321 in the vertical direction. In order to ensure the reliability of the upper mold when it is linked with the adjusting member 321, there should be a gap between the inner wall of the adjusting member 321 and the outer wall of the fastener 327 to ensure that the adjusting member 321 has sufficient stroke.

[0058] In some embodiments, the sealing mechanism 300 further includes a limiting component 330; the limiting component 330 is embedded in one end of the guide rail cavity 120, and the limiting component 330 surrounds and forms an movable cavity 331 for the first sliding component 310 to slide; in the length direction of the guide rail cavity 120, the pressing end 312 of the first sliding component 310 passes through the limiting component 330. The limiting component 330 is provided to provide the first sliding component 310 with a movable space, thereby providing clearance space for the installation of the guide rail 200 to be injected into the guide rail cavity 120, and providing a movable space for adaptive adjustment between the first sliding component 310 and the guide rail 200 to be injected into.

[0059] In some embodiments, a reset member 340 is embedded within the first sliding component 310. Along the length of the guide cavity 120, one end of the reset member 340 abuts against the inner wall of the limiting component 330, pushing the first sliding component 310 towards the side where the limiting end 311 of the first sliding component 310 is located. The reset member 340 is provided to apply a directional force to the first sliding component 310 after the upper mold and lower mold 100 separate, causing the first sliding component 310 to reset and separate from the injection-molded product, facilitating unloading. Preferably, the reset member 340 is a compression spring; more specifically, the reset member 340 is a disc spring.

[0060] In some embodiments, the limiting component 330 includes a limiting block 332 and at least two symmetrically arranged pressure strips 333; the limiting block 332 and the pressure strips 333 are respectively connected to the guide rail cavity 120; one end of the pressure strip 333 abuts against the limiting block 332 and forms a movable cavity 331; the movable cavity 331 is distributed along the length direction of the guide rail cavity 120, and the first sliding component 310 is embedded in the movable cavity 331. Further, a limiting bolt 350 is provided at the end of the movable cavity 331 away from the limiting block 332. The limiting bolt 350 is used to limit the first sliding component 310 in the length direction of the guide rail cavity 120 after the external force is removed. Preferably, there are two pressure strips 333, and the two pressure strips 333 are arranged parallel to each other along the length direction of the guide rail cavity 120 to restrict the degree of freedom of the first sliding component 310, so that the first sliding component 310 can only slide back and forth along the length direction of the guide rail cavity 120, ensuring reliability. The limiting block 332 is designed to cooperate with the reset member 340 to apply a reverse force to the first sliding component 310, thereby pushing the first sliding component 310 to reset.

[0061] In some embodiments, the first sliding assembly 310 includes a slider 316 and a spade base 317; the spade base 317 is connected to one end of the slider 316; in the length direction of the guide cavity 120, the sealing end of the spade base 317 passes through the slider 316, and the sealing end of the spade base 317 has a sealing end face for contacting the guide rail 200 to be injected. Further, the spade base 317 and the slider 316 are detachably connected. Specifically, the slider 316 is disposed in the movable cavity 331, while the spade base 317 passes through the limiting assembly 330. The spade base 317 is provided for extension, ensuring that the pushing force of the upper mold can act on the guide rail 200 to be injected, while the slider 316 is used to cooperate with the limiting block 332 and the reset member 340, so that after the force of the upper mold on the slider 316 is removed, the spade base 317 is driven to reset, so that the spade base 317 is separated from the product after injection molding, realizing rapid unloading.

[0062] In some embodiments, the slider 316 is provided with a limiting channel 318 distributed vertically; the fixed end of the shovel base 317 is embedded in the limiting channel 318, and the sealing end of the shovel base 317 passes through the limiting channel 318; in the vertical direction, the relative position between the fixed end of the shovel base 317 and the limiting channel 318 is adjustable. Preferably, in the vertical direction, the limiting channel 318 passes through the slider 316 to facilitate the disassembly and installation of the shovel base 317 and the slider 316, and to facilitate the height adjustment of the shovel base 317.

[0063] Embodiment 1 of this utility model is as follows:

[0064] A sealing mechanism for a mold, the mold including an upper mold and a lower mold 100, the lower mold 100 having an injection cavity 110, the injection cavity 110 including a guide cavity 120 for accommodating a guide rail 200 to be injected, a sealing mechanism 300 being embedded in one end of the guide cavity 120; the sealing mechanism 300 including a first sliding component 310 and a second sliding component 320; the first sliding component 310 being slidably embedded in the guide cavity 120, the first sliding component 310 being used to abut against the end face of the guide rail 200 to be injected; the second sliding component 320 being slidably embedded in the first sliding component 310, and the second sliding component 320 being at least partially protruding outward from the top surface of the first sliding component 310, so that the upper mold can push the second sliding component 320 to slide relative to the first sliding component 310. The guide rail cavity 120 has a positioning end 121 and an adjusting end 122, wherein the positioning end 121 is used to press against and position the guide rail 200 to be injected, while the adjusting end 122 is used to accommodate the sealing mechanism 300. The first sliding assembly 310 has a limiting end 311 and a pressing end 312 for pressing against the guide rail 200 to be injected.

[0065] In this embodiment, the second sliding assembly 320 includes an adjusting member 321, an elastic member 322, and a locking member 323. In the length direction of the guide rail cavity 120, the adjusting member 321, the elastic member 322, and the locking member 323 are arranged sequentially along the direction close to the pressing end 312, and the adjusting member 321 is slidably connected to the first sliding assembly 310. The adjusting member 321 can push the first sliding assembly 310 to move along the direction close to the pressing end 312 and compress the elastic member 322. The adjusting member 321 has a pushing part 324 for pressing against the upper mold, and the pushing part 324 protrudes outward from the top of the first sliding assembly 310.

[0066] In this embodiment, along the length of the guide cavity 120, the pushing part 324 has a first locking surface 325 for pressing against the upper mold; in the vertical direction, the first locking surface 325 gradually convexes outward and is inclined in a direction away from the axis of the pushing part 324. Further, along the length of the guide cavity 120, the pushing part 324 has a second locking surface 326 symmetrically arranged with the first locking surface 325.

[0067] In this embodiment, the first sliding assembly 310 has a first sliding cavity 313; along the length of the guide rail cavity 120, the first sliding cavity 313 has a first limiting wall 314 on the side near the pressing end 312 of the first sliding assembly 310, and correspondingly, the first sliding cavity 313 has a second limiting wall 315 on the side away from the pressing end 312 of the first sliding assembly 310; the adjusting member 321 can press against the first limiting wall 314 and push the first sliding assembly 310 to press against the guide rail 200 to be injected.

[0068] In this embodiment, the second sliding assembly 320 further includes a fastener 327; in the vertical direction, the fastener 327 passes through the adjusting member 321 and connects to the first sliding assembly 310; in the length direction of the guide rail cavity 120, there is a gap between the inner wall of the adjusting member 321 and the outer wall of the fastener 327. Preferably, the fastener 327 is a screw.

[0069] In this embodiment, the sealing mechanism 300 further includes a limiting component 330; the limiting component 330 is embedded in one end of the guide rail cavity 120, and the limiting component 330 surrounds to form an active cavity 331 for the first sliding component 310 to slide; in the length direction of the guide rail cavity 120, the pressing end 312 of the first sliding component 310 passes through the limiting component 330.

[0070] In this embodiment, a reset member 340 is embedded in the first sliding component 310; in the length direction of the guide rail cavity 120, one end of the reset member 340 abuts against the inner wall of the limiting component 330, which is used to push the first sliding component 310 to move toward the side where the limiting end 311 of the first sliding component 310 is located.

[0071] In this embodiment, the limiting component 330 includes a limiting block 332 and two symmetrically arranged pressure strips 333; the limiting block 332 and the pressure strips 333 are detachably connected to the guide rail cavity 120; one end of the pressure strip 333 abuts against the limiting block 332 and forms a movable cavity 331; the movable cavity 331 is distributed along the length direction of the guide rail cavity 120, and the first sliding component 310 is embedded in the movable cavity 331; the two pressure strips 333 are arranged parallel to each other along the length direction of the guide rail cavity 120. A limiting bolt 350 is provided at the end of the movable cavity 331 away from the limiting block 332.

[0072] In this embodiment, the first sliding assembly 310 includes a slider 316 and a spade base 317; the spade base 317 is connected to one end of the slider 316; along the length of the guide rail cavity 120, the sealing end of the spade base 317 passes through the slider 316, and the sealing end of the spade base 317 has a sealing end face for contacting the guide rail 200 to be injection molded. Further, the spade base 317 and the slider 316 are detachably connected. Specifically, the slider 316 is disposed within the movable cavity 331 and slidably connected to the pressure strip 333, while the spade base 317 passes through the limiting assembly 330.

[0073] In this embodiment, a limiting channel 318 distributed vertically is provided inside the slider 316; the fixed end of the shovel base 317 is embedded in the limiting channel 318, and the sealing end of the shovel base 317 passes through the limiting channel 318; in the vertical direction, the relative position between the fixed end of the shovel base 317 and the limiting channel 318 is adjustable. Preferably, in the vertical direction, the limiting channel 318 passes through the slider 316.

[0074] The working principle of this utility model is as follows:

[0075] Place the guide rail to be injected into the guide rail cavity 120, and place the glass in the corresponding position in the injection molding cavity 110;

[0076] During the mold closing process of the upper mold and lower mold 100, the upper mold and the first locking surface 325 press against each other and gradually push the adjusting member 321 to move towards the side where the injection guide 200 is located. The elastic member 322 is compressed until the adjusting member 321 presses against the first limiting wall 314. Then, the adjusting member 321 pushes the first sliding component 310 to move towards the side where the injection guide 200 is located, so that the sealing end face of the spade base 317 presses against the end face of the tolerance accumulation end of the injection guide 200, and injection molding is performed.

[0077] After injection molding is completed, the upper mold separates from the lower mold 100. The upper mold gradually separates from the first locking surface 325. Under the push of the limit block 332 and the reset component 340, the slider 316 drives the shovel base 317 to reset until the slider 316 presses against the limit bolt 350.

[0078] In summary, this utility model provides a sealing mechanism for a mold. By expanding the length of the guide rail cavity in the injection cavity of the lower mold and accommodating the sealing mechanism within it, the first and second sliding components of the sealing mechanism cooperate with the upper mold. This converts the vertical force into a horizontal force, thereby pushing the first sliding component against the end face of the tolerance accumulation end of the guide rail to be injected, eliminating the injection gap between the guide rail and the end face of the guide rail cavity, and ensuring a sealing effect. Furthermore, the increased length of the guide rail cavity allows for the accommodation of guide rails with positive tolerances, preventing interference between the guide rail and the mold.

[0079] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sealing mechanism for a mold, the mold comprising an upper mold and a lower mold, the lower mold having an injection cavity, characterized in that, The injection molding cavity includes a guide rail cavity for accommodating the guide rail to be injection molded, and the sealing mechanism is embedded at one end of the guide rail cavity; The sealing mechanism includes a first sliding component and a second sliding component; The first sliding component is slidably embedded in the guide rail cavity, and the first sliding component is used to press against the end face of the guide rail to be injected; The second sliding component is slidably embedded in the first sliding component, and the second sliding component is at least partially protruding from the top surface of the first sliding component, so that the upper mold can push the second sliding component to slide relative to the first sliding component.

2. The sealing mechanism for a mold according to claim 1, characterized in that, The first sliding component has a limiting end and a pressing end for pressing against the guide rail to be injected; The second sliding assembly includes an adjusting member, an elastic member, and a locking member; Along the length of the guide rail cavity, the adjusting member, the elastic member, and the locking member are arranged sequentially near the pressing end, and the adjusting member is slidably connected to the first sliding assembly; The adjusting member can push the first sliding component to move in a direction close to the pressing end and compress the elastic member; The adjusting member has a pushing part for pressing against the upper mold, the pushing part being disposed on the top of the first sliding assembly.

3. The sealing mechanism for a mold according to claim 2, characterized in that, Along the length of the guide rail cavity, the pushing part has a first locking surface for pressing against the upper mold; In the vertical direction, the first locking surface gradually convexes outward and tilts in a direction away from the axis of the pusher.

4. The sealing mechanism for a mold according to claim 2, characterized in that, The first sliding component has a first sliding cavity; Along the length of the guide rail cavity, the first sliding cavity has a first limiting wall on the side near the pressing end of the first sliding assembly; The adjusting member can press against the first limiting wall and push the first sliding component to press against the guide rail to be injected.

5. The sealing mechanism for a mold according to claim 4, characterized in that, The second sliding component also includes fasteners; In the vertical direction, the fastener passes through the adjusting member and connects to the first sliding assembly; Along the length of the guide rail cavity, there is a gap between the inner wall of the adjusting member and the outer wall of the fastener.

6. The sealing mechanism for a mold according to claim 1, characterized in that, The sealing mechanism also includes a limiting component; The limiting component is embedded at one end of the guide rail cavity, and the limiting component surrounds and forms a movable cavity for the first sliding component to slide. Along the length of the guide rail cavity, the pressing end of the first sliding component passes through the limiting component.

7. The sealing mechanism for a mold according to claim 6, characterized in that, The first sliding component is embedded with a reset element; Along the length of the guide rail cavity, one end of the reset member abuts against the inner wall of the limiting component, thereby pushing the first sliding component to move toward the side where the limiting end of the first sliding component is located.

8. The sealing mechanism for a mold according to claim 6, characterized in that, The limiting component includes a limiting block and at least two symmetrically arranged pressure strips; The limiting block and the pressure strip are respectively connected to the guide rail cavity; One end of the pressure strip abuts against the limiting block and forms the movable cavity; The movable cavity is distributed along the length of the guide rail cavity, and the first sliding component is embedded in the movable cavity.

9. A sealing mechanism for a mold according to any one of claims 1, 6-8, characterized in that, The first sliding component includes a slider and a shovel base; The shovel base is connected to one end of the slider; Along the length of the guide rail cavity, the sealing end of the shovel base passes through the slider, and the sealing end of the shovel base has a sealing end face for contacting the guide rail to be injected.

10. A sealing mechanism for a mold according to claim 9, characterized in that, The slider is provided with limiting channels distributed along the vertical direction; The fixed end of the shovel base is embedded in the limiting channel, and the sealing end of the shovel base passes through the limiting channel. In the vertical direction, the relative position between the fixed end of the shovel base and the limiting channel is adjustable.

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