Mechanical automatic sprue shearing device

Abstract

The utility model relates to the technical field of injection molds, in particular to a mechanical automatic sprue shearing device which comprises a mold base B and a mold base A. The mold base A is located below the mold base B and can move up and down. The insert in the mold base A can be matched with the cavity in the mold base B, a gap capable of forming a decorative ring product is reserved between the insert and the cavity, a molten liquid runner capable of being communicated with the gap is arranged in the mold base B, and molten liquid can be injected into the gap along the molten liquid runner. And an automatic sprue shearing structure capable of automatically shearing a sprue in the molten liquid runner when the mold base B and the mold base A are subjected to mold opening operation is arranged in the mold base B and the mold base A.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and specifically relates to a mechanical automatic gate shearing device. Background Technique

[0002] An injection mold is a tool for producing plastic products; it is also a tool for giving plastic products a complete structure and precise dimensions. Injection molding is a processing method used when mass-producing some parts with complex shapes. Specifically, it means injecting the heat-melted plastic into the mold cavity under high pressure by an injection molding machine, and after cooling and solidifying, a formed product is obtained.

[0003] In the conventional structure, trimming the gate requires a large amount of labor cost and also reduces the qualified rate of products. Therefore, the gate needs to be automatically completed on the mold. Thus, a mechanical automatic gate shearing device is proposed. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a mechanical automatic gate shearing device, which solves the problems put forward in the above background technique.

[0006] (2) Technical Solutions

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions: A mechanical automatic gate shearing device includes a B mold base and an A mold base. The A mold base is located below the B mold base and can move up and down. A cavity is provided in the B mold base, and an insert is provided in the A mold base. The insert in the A mold base can cooperate with the cavity in the B mold base, and there is a gap between the insert and the cavity that can form a decorative ring product. A molten liquid flow channel that can communicate with the gap is provided in the B mold base, and the molten liquid can be injected into the gap along the molten liquid flow channel. An automatic gate shearing structure is provided in the B mold base and the A mold base, which can automatically shear the gate in the molten liquid flow channel when the B mold base and the A mold base perform the mold opening operation.

[0008] Further, the automatic gate shearing structure includes a latch. The latch is installed in the A mold base. A lifter is provided in the B mold base, and the latch can drive the lifter to move during the mold opening operation. An adjusting rod that can contact the lifter is provided in the B mold base, and the lifter can drive the adjusting rod to rotate at an angle during the movement. A connecting guide block that is connected to the adjusting rod and can move up and down along the inside of the B mold base is provided in the B mold base. A cutter that is connected to the connecting guide block and can automatically shear the gate in the molten liquid flow channel when the connecting guide block moves is provided in the B mold base.

[0009] Further, the snap is installed in the A die base through bolts. A limiting block for limiting the movement of the lifter is provided in the A die base. An adjusting rod guiding block for limiting and guiding the adjusting rod is provided in the B die base. The adjusting rod is installed in the adjusting rod guiding block through a rotating shaft. The cutting knife is installed at the bottom end of the connecting guiding block through bolts.

[0010] Further, a protrusion integrally formed with the snap is provided at the position of the top end of the snap, and the bottom end of the protrusion is inclined at the position connected to the surface of the snap. An inclined surface A adapted to the connection between the protrusion and the snap is provided at one end of the lifter. The surface of the adjusting rod in contact with the lifter is an inclined surface B. An inclined short surface adapted to the inclined surface B is provided at the other end of the lifter.

[0011] Further, a first return spring elastically returning and connected to the inside of the B die base is provided in the lifter. A second return spring elastically returning and connected to the inside of the B die base is provided in the connecting guiding block. An adjusting rod limiting block that can be inserted into the B die base is provided in the adjusting rod guiding block.

[0012] Further, the automatic gate shearing structure is symmetrically arranged on both sides of the A die base.

[0013] Principle of mold opening and shearing:

[0014] When the mold is opened, the snap is fixed on the B die base. The snap drives the lifter to move (while compressing the spring). The movement of the lifter drives the adjusting rod to rotate around the rotating shaft. The adjusting rod drives the connecting guiding block and the cutting knife to move (while compressing the spring). The cutting knife squeezes the molten liquid runner to cut off the gate. At this time, the snap just completes the driving of the lifter, and the mold opening action is completed. The two springs are compressed during the previous action. After the snap completely releases the driving, the spring force will quickly restore the entire device.

[0015] Compared with the prior art, this mechanical automatic gate shearing device uses the mold opening action to accelerate the movement of the adjusting rod structure, synchronously realizing automatic gate shearing, saving the mold cycle, and avoiding problems such as the gate not being cut off due to insufficient driving force of the oil cylinder. The mechanical structure is safe, reliable and practical, requires less position space for the mold, can be used in most environments, and has a standardized structure. The mold only needs to replace the cutting knife, which is simple, convenient and fast for maintenance, improves production efficiency, and has great economic value. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of the decorative ring product, molten liquid runner and automatic gate shearing structure of the present utility model;

[0017] Figure 2Schematic perspective view of the automatic gate shearing structure of the present utility model;

[0018] Figure 3 For the present utility model Figure 2 Schematic cross-sectional view;

[0019] Figure 4 For the present utility model Figure 2 Schematic cross-sectional view;

[0020] Figure 5 For the present utility model Figure 2 Schematic view of the structure applied in the B mold base and the A mold base.

[0021] In the figure: 2, B mold base; 3, A mold base; 5, automatic gate shearing structure; 7, cavity; 8, insert; 17, molten liquid runner; 18, latch; 19, lifter; 20, adjusting rod; 21, connecting guide block; 22, cutter; 23, adjusting rod guide block; 24, rotating shaft; 25, first return spring; 26, second return spring; 29, limit block; 30, protrusion; 31, inclined surface A; 32, inclined surface B; 33, inclined short surface; 40, adjusting rod limit block; 41, garnish ring product. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Please refer to Figures 1 to 5, the present utility model provides a technical solution: a mechanical automatic gate shearing device, including a B mold base 2 and an A mold base 3. The A mold base 3 is located below the B mold base 2 and can move up and down. A cavity 7 is provided in the B mold base 2, and an insert 8 is provided in the A mold base 3. The insert 8 in the A mold base 3 can cooperate with the cavity 7 in the B mold base 2, and there is a gap between the insert 8 and the cavity 7 that can form a decorative ring product 41. A molten liquid flow channel 17 that can communicate with the gap is provided in the B mold base 2, and the molten liquid can be injected into the gap along the molten liquid flow channel 17. An automatic gate shearing structure 5 that can automatically shear the gate in the molten liquid flow channel 17 when the B mold base 2 and the A mold base 3 perform a mold opening operation is provided in the B mold base 2 and the A mold base 3. The automatic gate shearing structure 5 includes a latch 18. The latch 18 is installed in the A mold base 3 through bolts. A limit block 29 that can limit the movement of the lifter 19 is provided in the A mold base 3. An adjusting rod guide block 23 for limiting and guiding the adjusting rod 20 is provided in the B mold base 2. The adjusting rod 20 is installed in the adjusting rod guide block 23 through a rotating shaft 24. The cutter 22 is installed at the bottom end of the connecting guide block 21 through bolts. A protrusion 30 integrally formed with the latch 18 is provided at the top of the latch 18, and the bottom end of the protrusion 30 is inclined at the position connected to the surface of the latch 18. An inclined surface A 31 that can be adapted to the connection between the protrusion 30 and the latch 18 is provided at one end of the lifter 19. The surface of the adjusting rod 20 in contact with the lifter 19 is an inclined surface B 32. An inclined short surface 33 that can be adapted to the inclined surface B 32 is provided at the other end of the lifter 19. A first return spring 25 that is elastically retracted and connected to the inside of the B mold base 2 is provided in the lifter 19. A second return spring 26 that is elastically retracted and connected to the inside of the B mold base 2 is provided in the connecting guide block 21. An adjusting rod limit block 40 that can be inserted into the B mold base 2 is provided in the adjusting rod guide block 23. The latch 18 is installed in the A mold base 3. A lifter 19 is provided in the B mold base 2, and the latch 18 can drive the lifter 19 to move during the mold opening operation. An adjusting rod 20 that can contact the lifter 19 is provided in the B mold base 2, and the lifter 19 can drive the adjusting rod 20 to rotate at an angle during the movement. A connecting guide block 21 that is connected to the adjusting rod 20 and can move up and down along the inside of the B mold base 2 is provided in the B mold base 2. A cutter 22 that is connected to the connecting guide block 21 and can automatically shear the gate in the molten liquid flow channel 17 when the connecting guide block 21 moves is provided in the B mold base 2. The automatic gate shearing structure 5 is symmetrically arranged on both sides of the A mold base 3.

[0024] In the description of this specification, terms such as "connection", "installation", "fixation", "setting", etc. are all understood in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and technical effects, or it can be an integral connection or a partial connection. In the case of this example, for those of ordinary skill in the art, the specific meanings of the above terms in this utility model or the utility model can be understood according to specific circumstances.

[0025] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its utility model concept, makes an equivalent substitution or change, and should be covered within the protection scope of the present utility model.

Claims

1. A mechanical automatic shear gate device, comprising a B mold base (2) and an A mold base (3), wherein the A mold base (3) is located below the B mold base (2) and can move up and down, wherein the B mold base (2) is provided with a cavity (7), wherein the A mold base (3) is provided with an insert (8), wherein the insert (8) in the A mold base (3) can match with the cavity (7) in the B mold base (2) and a gap is left between the insert (8) and the cavity (7) to form a decorative ring product (41), wherein: The B mold base (2) is provided with a molten liquid flow channel (17) which can be connected to the gap, and the molten liquid can be injected into the gap along the molten liquid flow channel (17). The B mold base (2) and the A mold base (3) are provided with an automatic shearing gate structure (5) which can automatically shear the gate in the molten liquid flow channel (17) when the B mold base (2) and the A mold base (3) are opening the mold.

2. A mechanical automatic shear gate device according to claim 1, characterized in that: The automatic shearing gate structure (5) comprises a buckle (18), wherein the buckle (18) is installed in the A mold base (3); the B mold base (2) is provided with a shovel (19), and the buckle (18) can drive the shovel (19) to move when performing a mold opening operation; the B mold base (2) is provided with an adjustment rod (20) that can contact the shovel (19), and the shovel (19) can drive the adjustment rod (20) to rotate at an angle during the movement; the B mold base (2) is provided with a connecting guide block (21) that is connected to the adjusting rod (20) and can move up and down along the inside of the B mold base (2); and the B mold base (2) is provided with a cutter (22) that can be connected to the connecting guide block (21) and can automatically shear the gate in the molten liquid flow channel (17) when the connecting guide block (21) moves.

3. A mechanical automatic shear gate device according to claim 2, characterized in that: The buckle (18) is installed in the A mold base (3) by bolts, and the A mold base (3) is provided with a limit block (29) capable of limiting the movement of the shovel (19). The B mold base (2) is provided with an adjustment rod guide block (23) for limiting and guiding the adjustment rod (20). The adjustment rod (20) is installed in the adjustment rod guide block (23) through a rotating shaft (24), and the cutter (22) is installed at the bottom end of the connecting guide block (21) by bolts.

4. A mechanical automatic shear gate device according to claim 3, characterized in that: A protrusion (30) formed integrally with the buckle (18) is provided at the top of the buckle (18), and the bottom of the protrusion (30) is in an inclined state at the position where it is connected to the surface of the buckle (18). One end of the shovel (19) is provided with an inclined A surface (31) that can be matched with the connection between the protrusion (30) and the buckle (18), the surface where the adjustment rod (20) contacts the shovel (19) is an inclined B surface (32), and the other end of the shovel (19) is provided with an inclined short surface (33) that can be matched with the inclined B surface (32).

5. A mechanical automatic shear gate device according to claim 4, characterized in that: The shovel machine (19) is provided with a first return spring (25) which is connected to the inside of the B mold base (2) and has elastic return, the connecting guide block (21) is provided with a second return spring (26) which can be connected to the inside of the B mold base (2) and has elastic return, and the adjusting rod guide block (23) is provided with an adjusting rod limit block (40) which can be inserted into the B mold base (2).

6. A mechanical automatic shear gate device according to claim 5, characterized in that: The automatic shear gate structure (5) is symmetrically arranged at two sides of the A mold base (3).

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