A precise injection molding multi-cavity mold for a U-shaped lock sleeve

Abstract

The utility model relates to a kind of precision injection molding multi-cavity mould for U-shaped lock sleeve, including upper die and lower die, the upper die is equipped with upper die core, the lower die is equipped with lower die core, when the upper die and the lower die are closed, the upper die core and the lower die core form forming cavity, the forming cavity includes symmetric distribution for forming the first lock sleeve first forming cavity and for forming the second lock sleeve second forming cavity, the first forming cavity and second forming cavity are respectively communicated with injection runner, the lower die is equipped with chute in the side end of lower die core, the sliding seat is slidably assembled in the chute, the inner end both sides of the sliding seat are respectively equipped with the first pin and the second pin of the transverse through hole that can be inserted into the forming cavity for forming the first lock sleeve and the second lock sleeve.The utility model can conveniently process lock sleeve and corresponding hole position, and a variety of specifications of lock sleeve can be produced once injection molding.

Description

Technical Field

[0001] This utility model relates to the field of precision injection mold technology, and in particular to a precision injection multi-cavity mold for U-shaped lock sleeves. Background Technology

[0002] U-shaped lock sleeves are generally semi-enclosed objects extending outward from one side panel. They typically require transverse through-holes for mounting external accessories. Currently, injection molding is commonly used in the production of U-shaped lock sleeves. However, most existing injection molds are single-cavity molds, meaning only one size of U-shaped lock sleeve can be produced per injection. When producing multiple sizes, different molds must be used for each size, increasing mold change time and operational complexity, significantly reducing production efficiency, and making it difficult to meet the demands of mass production. Utility Model Content

[0003] Therefore, it is necessary to provide a precision injection multi-cavity mold for U-shaped lock sleeves.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A precision injection molding multi-cavity mold for U-shaped lock sleeves includes an upper mold and a lower mold. The upper mold is provided with an upper mold core, and the lower mold is provided with a lower mold core. When the upper mold and the lower mold are closed, the upper mold core and the lower mold core form a molding cavity. The molding cavity includes a first molding cavity for molding a first lock sleeve and a second molding cavity for molding a second lock sleeve, which are symmetrically distributed. The first molding cavity and the second molding cavity are respectively connected to an injection runner. The lower mold is provided with a sliding groove at the side end of the lower mold core. A sliding seat is slidably assembled in the sliding groove. The inner ends of the sliding seat are respectively provided with a first pin and a second pin that can extend into the molding cavity for molding the first lock sleeve and the second lock sleeve.

[0005] Furthermore, each sliding seat is provided with an oblique hole, and the upper mold is also fixedly provided with an oblique guide post for connecting to the oblique hole and driving the sliding seat to slide on the slide groove.

[0006] Furthermore, the bottom wall of the groove is provided with a limiting part for limiting the outward sliding stroke of the sliding seat.

[0007] Furthermore, each of the sliding blocks includes a first insert and a second insert. The inner side of the sliding block is provided with a first groove and a second groove for mounting the first insert and the second insert. The sliding block is formed with the oblique hole. The first insert is provided with the first pin, and the second insert is provided with the second pin.

[0008] Furthermore, the sliding seat also includes springs at opposite ends that abut against the wall of the mounting hole on the sliding seat and the side wall of the lower mold core, respectively.

[0009] Furthermore, the sliding seat is provided with limiting steps on both sides, and limiting blocks are assembled on the opposite side walls of the sliding groove, with the bottom end face of the limiting block abutting against the limiting steps.

[0010] Furthermore, the injection runner includes a main runner and a first branch runner and a second branch runner respectively disposed on both sides of the main runner. The middle section of the main runner is connected to the injection port preset in the upper mold. There are two first branch runners and two second branch runners. Each first branch runner is connected to a first molding cavity, and each second branch runner is connected to a second molding cavity.

[0011] Furthermore, the section of the lower mold located in the first molding cavity is equipped with a first insert, and the section of the lower mold located in the second molding cavity is equipped with a second insert and a third insert at intervals.

[0012] Furthermore, the lower mold includes a movable plate, on which are fixed a plurality of first ejector pins for pushing against the first locking sleeve and the second locking sleeve, and a plurality of second ejector pins that can extend into the preset through holes on the main channel.

[0013] Furthermore, the upper mold is also fixed with a third pin that can extend into the molding cavity and is used to form a longitudinal through hole for the first locking sleeve.

[0014] By adopting the above technical solution, the present invention has at least the following beneficial effects: The present invention, by setting a symmetrically distributed first molding cavity and a second molding cavity between the upper mold core and the lower mold core, can respectively mold the first locking sleeve and the second locking sleeve, realizing the production of locking sleeves of various specifications in a single injection molding process, greatly improving production efficiency. Simultaneously, a sliding groove is correspondingly set on the side end of the lower mold. After the first and second pins on the sliding seat complete the molding of the transverse through holes of the first and second locking sleeves, the sliding seat only needs to slide out along the sliding groove, and the pins can smoothly disengage from the locking sleeve. This facilitates the processing of the locking sleeve and the corresponding holes, making subsequent demolding work convenient. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a combined three-dimensional schematic diagram of an optional embodiment of the precision injection multi-cavity mold for U-shaped lock sleeves according to the present invention;

[0017] Figure 2 This is a perspective view of the upper mold of an optional embodiment of the precision injection multi-cavity mold for U-shaped lock sleeves according to the present invention;

[0018] Figure 3 This is a perspective view of the lower mold of an optional embodiment of the precision injection multi-cavity mold for U-shaped locking sleeves, showing the first locking sleeve, the second locking sleeve, and the sliding seat.

[0019] Figure 4 This is a perspective view of the lower mold of an optional embodiment of the precision injection multi-cavity mold for U-shaped lock sleeves according to the present invention.

[0020] In the attached diagram: 1. Upper mold; 10. Upper mold core; 11. Angled guide pillar; 12. Injection port; 13. Third pin; 2. Horizontal through hole; 3. Lower mold; 30. Lower mold core; 31. Slide groove; 310. Limiting part; 311. Limiting block; 32. Sliding seat; 320. Angled hole; 321. First pin; 322. Second pin; 323. Sliding block; 3231. First groove; 3232. Second groove; 324. 325. First insert; 326. Second insert; 327. Spring; 328. Limiting step; 329. Mounting hole; 33. First insert; 34. Second insert; 35. Third insert; 36. Movable plate; 4. First molding cavity; 40. First locking sleeve; 5. Second molding cavity; 50. Second locking sleeve; 6. Main channel; 60. Through hole; 7. First branch channel; 8. Second branch channel; 9. Longitudinal through hole; 100. Mold locking component. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0022] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] like Figures 1-4 As shown, an optional embodiment of this utility model provides a precision injection multi-cavity mold for U-shaped locking sleeves, including an upper mold 1 and a lower mold 3. The upper mold 1 is provided with an upper mold core 10, and the lower mold 3 is provided with a lower mold core 30. When the upper mold 1 and the lower mold 3 are closed, the upper mold core 10 and the lower mold core 30 form a molding cavity. The molding cavity includes a first molding cavity 4 for molding a first locking sleeve 40 and a second molding cavity 5 for molding a second locking sleeve 50, which are symmetrically distributed. The first molding cavity 4 and the second molding cavity 5 are respectively connected to an injection runner. The lower mold 3 is provided with a groove 31 at the side end of the lower mold core 30. A sliding seat 32 is slidably assembled on the groove 31. The inner ends of the sliding seat 32 are respectively provided with a first pin 321 and a second pin 322 that can extend into the molding cavity for molding the first locking sleeve 40 and the second locking sleeve 50.

[0024] This embodiment of the invention, by setting a symmetrically distributed first molding cavity 4 and a second molding cavity 5 between the upper mold core 10 and the lower mold core 30, can respectively mold the first locking sleeve 40 and the second locking sleeve 50, realizing the production of locking sleeves of various specifications in a single injection molding, greatly improving production efficiency. Simultaneously, a sliding groove 31 is correspondingly set on the side end of the lower mold 3. After the first pin 321 and the second pin 322 on the sliding seat 32 complete the molding of the transverse through holes 2 of the first locking sleeve 40 and the second locking sleeve 50, the sliding seat 32 can simply slide out along the sliding groove 31, and the pins can easily disengage from the locking sleeve. This facilitates the processing of the locking sleeve and the corresponding holes, making subsequent demolding easier. The first locking sleeve 40 and the second locking sleeve 50 injection molded by this invention can be interlocked to form a complete connecting component for doors, windows, and cabinet doors to achieve rotation.

[0025] In practical implementation, the side walls of the upper mold 1 and the lower mold 3 are opened and locked by the locking component 100. The locking component 100 can eliminate the gap of the mold parting surface under high injection pressure through mechanical rigid locking.

[0026] In one optional embodiment of this utility model, such as Figures 1-4 As shown, each sliding seat 32 is provided with an oblique hole 320. The upper mold 1 is also fixedly provided with an oblique guide post 11 for connecting to the oblique hole 320 and driving the sliding seat 32 to slide on the slide groove 31. In this embodiment, under the action of the oblique guide post 11, when the upper mold 1 and the lower mold 3 begin to close, the oblique guide post 11 will slide along the oblique hole 320, thereby pushing the sliding seat 32 to move inward on the slide groove 31, so that the first pin 321 and the second pin 322 on the sliding seat 32 extend into the molding cavity respectively, thereby forming the transverse through hole 2 of the first locking sleeve 40 and the second locking sleeve 50. At the same time, after the mold is closed, the oblique guide post 11 can also guide the sliding seat 32 to slide out through the oblique hole 320, so that the pins disengage from the locking sleeve, so as to facilitate the demolding of the locking sleeve.

[0027] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the bottom wall of the groove 31 is provided with a limiting part 310 for limiting the outward sliding stroke of the sliding seat 32. In this embodiment, by setting the limiting part 310, when the first pin 321 and the second pin 322 on the sliding seat 32 have completed the hole forming of the locking sleeve, the sliding seat 32 slides outward along the groove 31 to the limiting part 310, and is blocked by the limiting part 310, thereby ensuring that the pins can smoothly disengage from the locking sleeve, and at the same time preventing the sliding seat 32 from disengaging from the groove 31 due to excessive stroke when sliding outward. In practical applications, the limiting part 310 is a protrusion that cooperates with the groove on the sliding seat 32 to achieve stroke limitation.

[0028] In one optional embodiment of this utility model, such as Figures 1-4 As shown, each sliding seat 32 includes a sliding block 323, a first insert 324, and a second insert 325. The inner side of the sliding block 323 is provided with a first groove 3231 and a second groove 3232 for mounting the first insert 324 and the second insert 325. The sliding block 323 is formed with the oblique hole 320. The first insert 324 is provided with the first pin 321, and the second insert 325 is provided with the second pin 322. In this embodiment, by adopting a detachable design for the sliding seat 32, the first pin 321 and the second pin 322 are fixed to the first insert 324 and the second insert 325 respectively. The first insert 324 and the second insert 325 are respectively assembled into the first groove 3231 and the second groove 3232 of the sliding block 323 using connectors (e.g., bolts), thereby facilitating the subsequent maintenance and replacement of the sliding block 323, the first insert 324, and the second insert 325. In practical applications, the first insert 324 is equipped with two first pins 321, and the second insert 325 is equipped with two second pins 322, which are used to form two transverse through holes 2 on the first lock sleeve 40 and the second lock sleeve 50.

[0029] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the sliding seat 32 also includes springs 326 whose opposite ends abut against the wall of the mounting hole 329 on the sliding seat 32 and the side wall of the lower mold core 30, respectively. In this embodiment, by adding springs 326 to the sliding seat 32, the springs 326 can use the energy stored by elastic deformation after the sliding seat 32 completes its lateral movement to pull the slider back to its initial position; at the same time, the springs 326 can reduce the impact generated by the collision between the sliding seat 32 and the upper mold core 10 and the lower mold core 30, thereby reducing noise and component wear.

[0030] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the sliding seat 32 has limiting steps 328 on both sides, and limiting blocks 311 are assembled on the opposite side walls of the slide groove 31. The bottom surface of the limiting block 311 abuts against the limiting step 328. In this embodiment, by setting the limiting step 328 on the sliding seat 32 and assembling the limiting blocks 311 on both sides of the slide groove 31, the bottom surface of the limiting block 311 abuts against the limiting step 328, thereby limiting the range of movement of the sliding seat 32 within the slide groove 31 and improving the stability of the sliding seat 32 during lateral movement.

[0031] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the molding cavity is provided with a main channel 6 and a first branch channel 7 and a second branch channel 8 respectively disposed on both sides of the main channel 6. The middle section of the main channel 6 is connected to the injection port 12 preset in the upper mold 1. There are two first branch channels 7 and two second branch channels 8. Each first branch channel 7 is connected to one first molding cavity 4, and each second branch channel 8 is connected to one second molding cavity 5. In this embodiment, by setting the main channel 6 and the first branch channels 7 and the second branch channels 8, the injection material enters the main channel 6 from the injection port 12. The injection material can be evenly distributed into each first molding cavity 4 and second molding cavity 5, so that two first locking sleeves 40 and two second locking sleeves 50 are formed in one step.

[0032] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the section of the lower mold 3 located within the first molding cavity 4 is equipped with a first insert 33, and the section of the lower mold 3 located within the second molding cavity 5 is equipped with second inserts 34 and third inserts 35 at intervals. In this embodiment, by setting the first insert 33 within the first molding cavity 4 and the second inserts 34 and third inserts 35 at intervals within the second molding cavity 5, the molding locking sleeve can be easily adjusted and maintained by replacing the corresponding inserts. In practical applications, the third insert 35 is located in the middle of the second molding cavity 5, with two second inserts 34 arranged on its two sides. The upper and lower ends of the second inserts 34 and third inserts 35 extend respectively to the upper mold core 10 and the lower mold core 30.

[0033] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the lower mold 3 includes a movable plate 36, on which are fixed a plurality of first ejector pins (not shown) for pushing against the first locking sleeve 40 and the second locking sleeve 50, and a plurality of second ejector pins (not shown) that can extend into the pre-set through holes 60 on the main channel 6. In this embodiment, by setting the first ejector pins and the second ejector pins, after injection molding is completed, the first ejector pins can push the first locking sleeve 40 and the second locking sleeve 50 out of the mold respectively, and at the same time the second ejector pins can also clean the residual injection molding material on the main channel 6 to avoid affecting the next injection molding.

[0034] In one optional embodiment of this utility model, such as Figures 1-4 As shown, the upper mold 1 is also fixed with a third pin 13 that can extend into the molding cavity and is used to form the longitudinal through hole 9 of the first locking sleeve 40. In this embodiment, by setting the third pin 13, after injection molding is completed, the upper mold 1 can be removed to form the longitudinal through hole 9 of the first locking sleeve 40.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A precision injection multi-cavity mold for a U-shaped lock sleeve, comprising an upper mold and a lower mold, wherein the upper mold is provided with an upper mold core, and the lower mold is provided with a lower mold core, wherein when the upper mold and the lower mold are closed, the upper mold core and the lower mold core form a molding cavity, characterized in that, The molding cavity includes a first molding cavity for molding a first locking sleeve and a second molding cavity for molding a second locking sleeve, which are symmetrically distributed. The first molding cavity and the second molding cavity are respectively connected to an injection runner. The lower mold is provided with a sliding groove at the side end of the lower mold core. A sliding seat is slidably assembled in the sliding groove. The inner ends of the sliding seat are respectively provided with a first pin and a second pin that can extend into the molding cavity for molding the first locking sleeve and the second locking sleeve.

2. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 1, characterized in that, Each sliding seat is provided with an oblique hole, and the upper mold is also fixedly provided with an oblique guide post for connecting to the oblique hole and driving the sliding seat to slide on the slide groove.

3. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 2, characterized in that, The bottom wall of the chute is provided with a limiting part for limiting the outward sliding stroke of the sliding seat.

4. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 2, characterized in that, Each of the sliding blocks includes a sliding block, a first insert and a second insert. The inner side of the sliding block is provided with a first groove and a second groove for mounting the first insert and the second insert. The sliding block is formed with the oblique hole. The first insert is provided with the first pin and the second insert is provided with the second pin.

5. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 4, characterized in that, The sliding seat also includes springs at opposite ends that abut against the wall of the mounting hole and the side wall of the lower mold core, respectively.

6. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 2, characterized in that, The sliding seat is provided with limiting steps on both sides, and limiting blocks are assembled on the opposite side walls of the sliding groove. The bottom end face of the limiting block abuts against the limiting steps.

7. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 1, characterized in that, The injection runner includes a main runner and a first branch runner and a second branch runner respectively disposed on both sides of the main runner. The middle section of the main runner is connected to the injection port preset in the upper mold. There are two first branch runners and two second branch runners. Each first branch runner is connected to a first molding cavity, and each second branch runner is connected to a second molding cavity.

8. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 7, characterized in that, The section of the lower mold located in the first molding cavity is equipped with a first insert, and the section of the lower mold located in the second molding cavity is equipped with a second insert and a third insert at intervals.

9. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 7, characterized in that, The lower mold includes a movable plate, on which are fixed a plurality of first ejector pins for pushing against the first and second locking sleeves and a plurality of second ejector pins that can extend into the pre-set through holes on the main channel.

10. The precision injection multi-cavity mold for U-shaped locking sleeves according to claim 1, characterized in that, The upper mold is also fixed with a third pin that can extend into the molding cavity and be used to form a longitudinal through hole for the first locking sleeve.

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