Injection mold with automatic sealing function

Abstract

The utility model belongs to the technical field of injection molds, and discloses an injection mold with an automatic sealing function, which comprises a support frame and a lower mold, the top end of the support frame is fixedly connected with a fixing frame, the top end of the fixing frame is fixedly connected with a first motor, and the output end of the first motor is rotatably connected with a threaded rod; the outer side of the threaded rod is arranged in the supporting frame in a penetrating mode, a connecting base is fixedly connected to the bottom end of the threaded rod, an upper mold is fixedly connected to the bottom end of the connecting base, a plastic spraying pipe is slidably connected to the interior of a sliding groove of the connecting base, and the bottom end of the plastic spraying pipe is arranged in a discharging groove of the upper mold. The problems that only an upper mold and a lower mold of an injection mold are attached to each other, no sealing device is arranged, so that the sealing performance of the injection mold is poor, in the injection molding process, air easily enters a mold cavity, bubbles are easily generated in a plastic product, the product quality is affected, and the practicability of the injection mold is reduced are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, in particular to an injection mold with an automatic sealing function. Background Art

[0002] An injection mold is a tool for producing plastic products and also a tool for giving plastic products a complete structure and precise size.

[0003] Meanwhile, patent application number 201821765257.6 discloses an injection mold comprising a front mold and a back mold. The front mold is adapted to mate with the back mold. The front mold comprises a front mold fixing plate, a positioning ring, a glue inlet, a front mold base plate, and a runner. The positioning ring is mounted on the front mold fixing plate, the glue inlet communicates with the positioning ring, and the front mold base plate is mounted on the front mold fixing plate. This utility model relates to an injection mold.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned injection mold only fits the upper mold and the lower mold together, and no sealing device is set, which makes the sealing performance of the injection mold weak. During the injection molding process, air can easily enter the mold cavity, which can easily cause bubbles to appear in the plastic product, affecting the product quality and reducing the practicality of the injection mold. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides an injection mold with an automatic sealing function. The injection mold with an automatic sealing function can ensure that the edge of the shell is neat and smooth, without excess plastic overflow, and at the same time the internal structure is uniform and consistent, thereby enhancing the strength and stability of the product.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an injection mold with an automatic sealing function, comprising a support frame and a lower mold, the top of the support frame is fixedly connected to a fixing frame, the top of the fixing frame is fixedly connected to a first motor, the output end of the first motor is rotatably connected to a threaded rod, the outer side of the threaded rod passes through the interior of the support frame, the bottom end of the threaded rod is fixedly connected to a connecting seat, the bottom end of the connecting seat is fixedly connected to an upper mold, a sliding groove is provided inside the connecting seat, a plastic spraying pipe is slidably connected inside the sliding groove of the connecting seat, a discharge trough is provided inside the upper mold, the bottom end of the plastic spraying pipe is arranged inside the discharge trough of the upper mold, and the top of the upper mold is fixedly connected to a sliding rod.

[0007] Preferably, a square groove is provided at the top of the lower mold, a sealing groove is provided on the outside of the square groove of the lower mold, a sealing strip is adhered to the inside of the sealing groove of the lower mold, a vertical groove is provided inside the lower mold, a fixed column is slidably connected to the inside of the vertical groove of the lower mold, the bottom end of the fixed column is fixedly connected to a slide, the bottom end of the slide is fixedly connected to a base plate, and the top of the base plate is fixedly connected to a side plate.

[0008] Preferably, a second motor is fixedly connected to the top of the base plate, and the top of the second motor passes through the inner center position of the slide plate.

[0009] Preferably, the top of the slide plate is fixedly connected to a sliding rod, a sliding groove is opened in the internal position of the lower mold, the sliding rod slides inside the sliding groove of the lower mold, a spring is tied to the outer side of the sliding rod, and a sliding plate is tightly set on the top of the spring, and the sliding plate is slidably set inside the square groove of the lower mold.

[0010] Preferably, the front end of the upper mold is fixedly connected to an upper locking buckle, the interior of the upper locking buckle is rotatably connected to a rotating shaft, the outer side of the rotating shaft is hooked with a rotating arm, and the rotating arm is rotatably connected inside the upper locking buckle.

[0011] Preferably, a locking block is slidably connected to the outer side of the rotating arm, a handle is fixedly connected to the outer side of the rotating arm, and a clamping rod is slidably connected to the inner side of the rotating arm, and the clamping rod clamps the outer side of another set of rotating arms.

[0012] Preferably, a fixing pin is fixedly connected to the inner center position of the locking block, the rear side of the fixing pin is fixedly connected to the front end of the lower mold, a positioning groove is provided at the top of the lower mold, the bottom end of the sliding rod slides inside the positioning groove of the lower mold, and the lower mold and the upper mold are slidably connected.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model increases the sealing between the upper mold and the lower mold by adding a sealing strip inside the lower mold, effectively preventing the leakage of the injection molding material, so that the plastic material can evenly fill the mold cavity, reduce the generation of defects such as flash and bubbles, and improve the dimensional accuracy and appearance quality of the product.

[0015] 2. The utility model adds a locking device between the upper mold and the lower mold. When the upper mold slides downward, the rotating arm touches the locking block and then spreads to both sides. Then the rotating arm and the locking block are locked to achieve locking between the upper and lower molds and improve the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the upper mold structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the rotating arm of the utility model;

[0019] Figure 4 This is a schematic diagram of the side panel structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the lower mold structure of the present utility model.

[0021] In the figure: 1. Support frame; 2. Fixed frame; 3. First motor; 4. Threaded rod; 5. Connecting seat; 6. Upper mold; 7. Plastic spraying tube; 8. Sliding rod; 9. Lower mold; 10. Sealing strip; 11. Sliding plate; 12. Side plate; 13. Fixed column; 14. Slide plate; 15. Second motor; 16. Base plate; 17. Sliding rod; 18. Spring; 19. Upper locking buckle; 20. Rotating shaft; 21. Rotating arm; 22. Clamping rod; 23. Handle; 24. Locking block; 25. Fixing pin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 5 As shown, the utility model provides an injection mold with an automatic sealing function, including a support frame 1 and a lower mold 9. The top of the support frame 1 is fixedly connected to a fixing frame 2, the first motor 3 rotates clockwise, and the output end of the first motor 3 drives the threaded rod 4 to rotate. The connecting seat 5 welded at the bottom end of the threaded rod 4 drives the upper mold 6 at the bottom to slide downward. When the upper mold 6 slides along the internal sliding rod 8, the sliding rod 8 is inserted into the positioning groove at the top of the lower mold 9. When the sealing strips 10 inside the sealing grooves of the upper mold 6 and the lower mold 9 are pressed tightly, plastic is finally injected from the plastic spraying tube 7. The plastic is injected between the upper mold 6 and the lower mold 9 and is cooled and formed.

[0024] Specifically, when the sealing strip 10 inside the sealing groove of the upper mold 6 and the lower mold 9 is pressed tightly, the rotating arm 21 is locked with the locking block 24, and finally plastic is injected from the plastic injection tube 7, the plastic is injected into the space between the upper mold 6 and the lower mold 9, and is cooled and formed.

[0025] Furthermore, a second motor 15 is fixedly connected to the top of the base plate 16 .

[0026] Furthermore, the slide plate 14 pushes the fixed column 13 at the top and the slide rod 17 at the center position to slide toward the top. A spring 18 is tied to the outer side of the slide rod 17, and the top of the spring 18 is tightly pressed against the sliding plate 11. At this time, the sliding plate 11 inside the lower mold 9 slides out from the inside of the lower mold 9, and the injection molded part is taken out.

[0027] It is worth noting that the front end of the upper mold 6 is fixedly connected to the upper locking buckle 19 by bolts, the internal rotation of the upper locking buckle 19 is connected to the rotating shaft 20, the outer side of the rotating shaft 20 is tied with a rotating arm 21, and the rotating arm 21 is rotatably connected inside the upper locking buckle 19.

[0028] It is worth noting that the rotating arm 21 inside the upper locking buckle 19 touches the locking block 24 at the front end of the lower mold 9 and then stretches to both sides. A handle 23 is welded on the outside of the rotating arm 21. When the upper mold 6 and the lower mold 9 need to be separated, hold the handle 23 and slide it to the left, and push the internal sliding connection of the rotating arm 21 to have a clamping rod 22. The clamping rod 22 presses against the outside of another set of rotating arms 21 and rotates outward, contacting the rotating arm 21 to fix the locking block 24.

[0029] It is worth mentioning that a fixing pin 25 is fixedly connected to the internal center position of the locking block 24, and the rear side of the fixing pin 25 is fixedly connected to the front end of the lower mold 9. A positioning groove is provided at the top of the lower mold 9, and the bottom end of the sliding rod 8 slides inside the positioning groove of the lower mold 9, and the lower mold 9 and the upper mold 6 are slidably connected.

[0030] Among them, the first motor 3 and the second motor 15 are prior art and will not be described in detail. At the same time, the present invention also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail. The "front, back, left and right" perspectives of this device are as follows: Figure 1 The direction shown in the figure is the reference.

[0031] Working principle:

[0032] Start the first motor 3 at the top of the fixed frame 2, the first motor 3 rotates clockwise, the output end of the first motor 3 drives the threaded rod 4 to rotate, and the connecting seat 5 welded at the bottom end of the threaded rod 4 drives the upper mold 6 at the bottom end to slide downward, and simultaneously, the rotating arm 21 inside the locking buckle 19 on the front end of the upper mold 6 touches the locking block 24 at the front end of the lower mold 9 and then stretches to both sides. When the upper mold 6 slides along the internal sliding rod 8, the sliding rod 8 is inserted into the inside of the positioning groove at the top of the lower mold 9. When the sealing strips 10 inside the sealing grooves of the upper mold 6 and the lower mold 9 are pressed tightly, the rotating arm 21 is locked with the locking block 24. Finally, plastic is injected from the spray tube 7, and the plastic is injected between the upper mold 6 and the lower mold 9, and is cooled and formed.

[0033] Then rotate the first motor 3 counterclockwise, and the upper mold 6 separates from the top of the lower mold 9. When the injection molded product needs to be taken out, the second motor 15 at the top of the base plate 16 is started, and the output end of the second motor 15 presses against the slide plate 14 at the top and slides upward along the slide groove of the side plate 12. The slide plate 14 pushes the fixed column 13 at the top and the slide rod 17 at the center position to slide toward the top. At this time, the sliding plate 11 inside the lower mold 9 slides out from the inside of the lower mold 9, and the injection molded part is taken out.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold with an automatic sealing function, comprising a support frame (1) and a lower mold (9), characterized in that: The top of the support frame (1) is fixedly connected to a fixing frame (2), the top of the fixing frame (2) is fixedly connected to a first motor (3), the output end of the first motor (3) is rotatably connected to a threaded rod (4), the outer side of the threaded rod (4) passes through the interior of the support frame (1), the bottom end of the threaded rod (4) is fixedly connected to a connecting seat (5), the bottom end of the connecting seat (5) is fixedly connected to an upper mold (6), a sliding groove is provided inside the connecting seat (5), a plastic spraying pipe (7) is slidably connected inside the sliding groove of the connecting seat (5), a discharge trough is provided inside the upper mold (6), the bottom end of the plastic spraying pipe (7) is arranged inside the discharge trough of the upper mold (6), and the top of the upper mold (6) is fixedly connected to a sliding rod (8).

2. The injection mold with automatic sealing function according to claim 1, characterized in that: A square groove is provided at the top of the lower mold (9), a sealing groove is provided on the outside of the square groove of the lower mold (9), a sealing strip (10) is adhered to the inside of the sealing groove of the lower mold (9), a vertical groove is provided inside the lower mold (9), a fixed column (13) is slidably connected to the inside of the vertical groove of the lower mold (9), the bottom end of the fixed column (13) is fixedly connected to a slide plate (14), the bottom end of the slide plate (14) is fixedly connected to a base plate (16), and the top end of the base plate (16) is fixedly connected to a side plate (12).

3. The injection mold with automatic sealing function according to claim 2, characterized in that: The top end of the base plate (16) is fixedly connected to a second motor (15), and the top end of the second motor (15) passes through the inner center position of the slide plate (14).

4. The injection mold with automatic sealing function according to claim 3, characterized in that: The top end of the slide plate (14) is fixedly connected to a slide rod (17), a slide groove is provided in the inner position of the lower mold (9), the slide rod (17) slides inside the slide groove of the lower mold (9), a spring (18) is tied to the outer side of the slide rod (17), and a slide plate (11) is tightly arranged on the top end of the spring (18), and the slide plate (11) is slidably arranged inside the square groove of the lower mold (9).

5. The injection mold with automatic sealing function according to claim 1, characterized in that: The front end of the upper mold (6) is fixedly connected to an upper locking buckle (19), the interior of the upper locking buckle (19) is rotatably connected to a rotating shaft (20), the outer side of the rotating shaft (20) is hooked with a rotating arm (21), and the rotating arm (21) is rotatably connected to the interior of the upper locking buckle (19).

6. The injection mold with automatic sealing function according to claim 5, characterized in that: The outer side of the rotating arm (21) is slidably connected to a locking block (24), the outer side of the rotating arm (21) is fixedly connected to a handle (23), the inner side of the rotating arm (21) is slidably connected to a pressing rod (22), and the pressing rod (22) presses against the outer side of another group of rotating arms (21).

7. The injection mold with automatic sealing function according to claim 6, characterized in that: A fixing pin (25) is fixedly connected to the inner center position of the locking block (24), and the rear side of the fixing pin (25) is fixedly connected to the front end of the lower mold (9). A positioning groove is provided at the top end of the lower mold (9), and the bottom end of the sliding rod (8) slides inside the positioning groove of the lower mold (9), and the lower mold (9) and the upper mold (6) are slidably connected.

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