Mold closing control mechanism on fixed mold side of injection mold

Abstract

A fixed mold side mold closing control mechanism of an injection mold comprises an upper compound plate, a fixed mold plate is arranged below the upper compound plate, a fixed mold frame is arranged below the fixed mold plate, an upper mold closing limiting rod is arranged on the side wall of the upper compound plate, a fixed block is arranged on the side wall of the fixed mold plate, a first through hole and a second through hole are formed in the fixed block, and a sliding block is arranged on the fixed block. A third through hole and a fourth through hole are formed in the sliding block, a lower mold closing push rod is arranged on the side wall of the fixed mold frame, a conical surface is arranged at the upper end of the lower mold closing push rod, the lower mold closing push rod is inserted into the second through hole of the fixed block, and the conical surface is matched with the fourth through hole of the sliding block. After the upper compound plate, the fixed mold plate and the fixed mold frame are opened twice, the fixed mold plate and the fixed mold frame are closed for the first time in the mold closing process, then the upper compound plate and the fixed mold plate are closed for the second time in the mold closing process, mold closing can be conducted in sequence, the interference phenomenon of internal structures caused by synchronous mold closing is avoided, and it is guaranteed that all the structures can be reset smoothly in the mold closing process.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a mold clamping control mechanism on the fixed mold side of the injection mold. Background Art

[0002] When using injection molds to produce plastic parts, such as injection molds for plastic pipe fittings, if the plastic pipe fittings are multi-way pipes, and the plastic pipe fittings are provided with connecting pipes on one side of the fixed mold, and the inner wall of the connecting pipes is provided with inner flarings, it is necessary to set structures for removing the inner flarings and inner core pulling on the fixed mold side, and the fixed mold side needs to be opened twice. When opening the mold for the first time, the slider at the inner flaring is first slid inward to pull the core out of the inner flaring, and the fixed mold core and the slider are moved upward together for inner core pulling to pull out the connecting pipe. When the plastic pipe fittings are demolded, the mold is gradually closed, and the position of the secondary mold opening is also gradually closed. The position of the secondary mold opening in the existing structure is synchronous closing, that is, the fixed mold core and the slider move downward together to reset, and the slider slides outward to reset. When the slider has not moved down to its position, it slides outward, which easily causes the slider to interfere with the structure of the inner wall of the fixed mold, affecting the closing action. Summary of the invention

[0003] The utility model aims to overcome the shortcomings of the prior art and to provide a fixed mold side mold closing control mechanism for an injection mold, which can sequentially close the mold after the secondary mold opening to ensure that the fixed mold side structure can be closed and reset smoothly.

[0004] The utility model discloses a technical scheme of a mold clamping control mechanism on a fixed mold side of an injection mold, which comprises an upper composite plate, a fixed mold plate is arranged under the upper composite plate, a fixed mold frame is arranged under the fixed mold plate, an upper mold clamping limit rod is arranged on the side wall of the upper composite plate, a fixed block is arranged on the side wall of the fixed mold plate, a first through hole and a second through hole are formed in the fixed block, a sliding block is arranged on the fixed block, a third through hole and a fourth through hole are formed in the sliding block, a lower mold clamping push rod is arranged on the side wall of the fixed mold frame, an upper head of the lower mold clamping push rod is formed with a conical surface, the lower mold clamping push rod is inserted into the second through hole of the fixed block, and the conical surface matches the fourth through hole of the sliding block.

[0005] Furthermore, positioning baffles are arranged on both sides of the fixing block located on the sliding block.

[0006] Furthermore, a spring hole is formed on one side of the sliding block, a spring is arranged in the spring hole, one side of the spring is in contact with the sliding block, and the other side of the spring is in contact with the positioning baffle.

[0007] Furthermore, a slide groove is arranged on the fixed block, and the sliding block cooperates with the slide groove.

[0008] Furthermore, the slide groove is an I-shaped groove or a dovetail groove, and the corresponding slider is an I-shaped slider or a dovetail slider.

[0009] The beneficial effects of the fixed mold side mold closing control mechanism of an injection mold of the present utility model are as follows: after the upper clamping plate, the fixed mold plate, and the fixed mold frame are opened in two steps, when closing the mold, the first mold closing is carried out first from the fixed mold plate and the fixed mold frame, and then the second mold closing is carried out from the upper clamping plate and the fixed mold plate. It can close the mold in sequence, avoid interference of its internal structure caused by synchronous mold closing, and ensure that each structure can be reset smoothly when closing the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the open mold state of the fixed mold side mold closing control mechanism of an injection mold of the present utility model;

[0011] Figure 2 is Figure 1 a partially enlarged schematic view of part A of

[0012] Figure 3 is a three-dimensional schematic view of the cooperation state of the fixed block and the slider;

[0013] Figure 4 is a schematic structural diagram of the first mold closing state of the fixed mold side mold closing control mechanism of an injection mold of the present utility model;

[0014] Figure 5 is a schematic structural diagram of a plastic pipe fitting injection mold;

[0015] Figure 6 is Figure 5 a partially enlarged schematic view of part B of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model relates to a fixed mold side mold closing control mechanism of an injection mold, as Figure 1 — Figure 5As shown, the injection mold includes an upper composite plate 1 and a lower composite plate 21, a fixed mold plate 2 is arranged under the upper composite plate 1, a fixed mold frame 3 and a fixed mold insert 22 are arranged under the fixed mold plate 2, a fixed mold core 23 is arranged in the fixed mold plate 2 and the fixed mold insert 22, an upper mold limiting rod 4 is arranged on the side wall of the upper composite plate 1, a fixed block 5 is arranged on the side wall of the fixed mold plate 2, a first through hole 6 and a second through hole 7 are formed in the fixed block 5, a slider 8 is arranged on the fixed block 5, a third through hole 9 and a fourth through hole 10 are formed in the slider 8, a lower mold push rod 11 is arranged on the side wall of the fixed mold frame 3, a conical surface 12 is formed on the upper head of the lower mold push rod 11, the lower mold push rod 11 is inserted into the second through hole 7 of the fixed block 5, and the conical surface 12 cooperates with the fourth through hole 10 of the slider 8, a mold foot 24 is arranged on the lower composite plate 21, and an upper ejector plate 25 and a lower ejector plate 26 are arranged on the lower composite plate 21 between the mold feet 24. A needle plate 26 and an ejector pin 27, a movable mold plate 28 is arranged on the mold foot 24, a movable mold insert 29 and a movable mold core 30 are arranged on the movable mold plate 28, a mold cavity is formed between the fixed mold insert 22, the fixed mold core 23, the movable mold insert 29 and the movable mold core 30, an injection molded plastic pipe fitting 31 is arranged in the mold cavity, an upper pipe fitting 32 is formed in the plastic pipe fitting 31, an inner flare 35 is formed at the mouth of the upper pipe fitting 32, a secondary mold opening and core pulling structure for escaping the upper pipe fitting 32 and the inner flare 35 is arranged in the upper composite plate 1 and the fixed mold plate 2, the secondary mold opening and core pulling structure comprises an upper core pulling slide rail 36 and an upper core pulling slider 37, the upper part of the upper core pulling slide rail 36 is connected to a pull rod 38, the pull rod 38 is fixed to the upper composite plate 1, the outer wall of the upper core pulling slide rail 36 is slidably matched with the inner wall of the upper core pulling slider 37, and the outer wall of the upper core pulling slider 37 is matched with the inner flare 35 of the upper pipe fitting 32.

[0017] Furthermore, the fixing block 5 is provided with positioning baffles 13 on both sides of the slider 8. With the positioning baffles 13, the left and right sliding of the slider 8 is positioned to prevent it from sliding too far, which causes the lower mold push rod 11 to be unable to be inserted into the fourth through hole 10 of the slider 8.

[0018] Furthermore, a spring hole 14 is formed on one side of the slider 8, a spring 15 is arranged in the spring hole 14, one side of the spring 15 contacts the slider 8, and the other side of the spring 15 contacts the positioning baffle 13. With the spring 15, when the mold is in the secondary mold opening state (that is, the upper composite plate 1 and the fixed mold plate 2 are opened, and the fixed mold plate 2 and the fixed mold frame 3 are opened), the spring 15 pushes the slider 8 to the leftmost position, so that the third through hole 9 of the slider 8 is staggered with the upper mold closing limit rod 4, so as to prevent the upper mold closing limit rod 4 from being inserted into the third through hole 9, resulting in the phenomenon of premature mold closing and resetting.

[0019] Further, a slide groove 16 is provided on the fixed block 5, and the slide block 8 cooperates with the slide groove 16. With the slide groove 16, the slide of the slide block 8 is guided, making it slide more smoothly.

[0020] Furthermore, the chute 16 is an I-shaped groove or a dovetail groove, and the corresponding slider 8 is an I-shaped slider or a dovetail slider.

[0021] The utility model discloses a mold clamping control mechanism for a fixed mold side of an injection mold. After a plastic pipe 31 is injection molded, the injection mold is first opened from an upper composite plate 1 and a fixed mold plate 2 (the mold opening sequence of the mold can be controlled by a secondary mold opening control device, and the specific structure of the secondary mold opening control device is an existing technology). The upper composite plate 1 drives a pull rod 38 to remain stationary, and the pull rod 38 drives an upper core-pulling slide rail 36 to remain stationary, while the fixed mold plate 2 drives an upper core-pulling slider 37 and all components below it to move downward, so that the mold is opened for the first time from the upper composite plate 1 and the fixed mold plate 2. At this time, the upper core-pulling slider 37 cooperates with the upper core-pulling slide rail 36, so that the upper core-pulling slider 37 gradually moves inward to pull out the inner flaring 35, and the upper end of the upper core-pulling slider 37 is aligned with the fixed mold plate. 2 is out of contact, at this time, the upper plate 1 drives the pull rod 38, the upper core-pulling slide rail 36, and the upper core-pulling slider 37 to remain stationary, the fixed mold plate 2 drives the fixed mold core 23 to remain stationary, and other components move downward, so that the mold is opened from the fixed mold plate 2 and the fixed mold frame 3, and the fixed mold insert 22 for a second time. At this time, the upper core-pulling slider 37 and the fixed mold core 23 pull out the upper pipe 32, and when the movable mold core 30 of the plastic pipe 31 pulls out the left pipe 33 and the right pipe 34 (the core-pulling structure and action of the movable mold core 30 and the left and right pipes 33, 34 are conventional technologies), the upper and lower ejector plates 25, 26 drive the ejector 27 to eject the plastic pipe 31. At this time, the injection mold begins to gradually close and reset. During the reset, Since the spring 15 pushes the slider 8 to the left, the third through hole 9 in the slider 8 and the upper mold limiting rod 4 are in an eccentrically offset state, that is, the lower end of the upper mold limiting rod 4 is on the slider 8 and cannot be inserted into the third through hole 9, and the upper composite plate 1 and the fixed mold plate 2 cannot be molded, so that the mold is first molded from the fixed mold plate 2 and the fixed mold frame 3, wherein the lower mold closing push rod 11 on the side wall of the fixed mold frame 3 is first inserted into the second through hole 7 of the fixed block 5, and since the upper head of the lower mold closing push rod 11 is formed with a conical surface 12, it cooperates with the fourth through hole 9 of the slider 8 through the conical surface 12, and under the guiding action of the conical surface 12, the slider 8 is driven to move to the right, so that the fixed mold plate 2 and the fixed mold frame 3, and the fixed mold insert 22 are molded in place, that is, the fixed mold core 23, the fixed mold upper core-pulling slide rail 36 and The upper core-pulling slider 37 is first inserted into the fixed mold insert 22. At this time, the third perforation 9 in the slider 8 also corresponds to the upper mold limiting rod 4, and the third perforation 9 and the first perforation 6 of the fixed block 5 also correspond to each other. The injection mold continues to be molded, and the upper mold limiting rod 4 can be inserted into the third perforation 9 and the first perforation 6 to complete the mold closing between the upper composite plate 1 and the fixed mold plate 2, that is, the upper composite plate 1 drives the pull rod 38 and the upper core-pulling slide rail 36 to reset, and the upper core-pulling slide rail 36 drives the upper core-pulling slider 37 to move outward, so that the upper core-pulling slider 37 is reset last. In this way, it can be avoided that the upper core-pulling slider 37 is reset first, which causes interference with the structure of the inner wall of the fixed mold plate 2 and affects the mold closing action. Sequential mold closing is carried out in sequence to ensure that the structure on one side of the fixed mold can be smoothly closed and reset.

Claims

1. A mold clamping control mechanism for a fixed mold side of an injection mold, comprising an upper composite plate (1), a fixed mold plate (2) disposed below the upper composite plate (1), and a fixed mold frame (3) disposed below the fixed mold plate (2), characterized in that: An upper mold clamping limit rod (4) is arranged on the side wall of the upper composite plate (1); a fixed block (5) is arranged on the side wall of the fixed mold plate (2); a first through hole (6) and a second through hole (7) are formed in the fixed block (5); a slider (8) is arranged on the fixed block (5); a third through hole (9) and a fourth through hole (10) are formed in the slider (8); a lower mold clamping push rod (11) is arranged on the side wall of the fixed mold frame (3); a conical surface (12) is formed on the upper head of the lower mold clamping push rod (11); the lower mold clamping push rod (11) is inserted into the second through hole (7) of the fixed block (5); and the conical surface (12) matches the fourth through hole (10) of the slider (8).

2. The fixed mold side mold clamping control mechanism of an injection mold according to claim 1, characterized in that: The fixing block (5) is provided with positioning baffles (13) on both sides of the sliding block (8).

3. The fixed mold side mold clamping control mechanism of an injection mold according to claim 2, characterized in that: A spring hole (14) is formed on one side of the slider (8), a spring (15) is arranged in the spring hole (14), one side of the spring (15) contacts the slider (8), and the other side of the spring (15) contacts the positioning baffle (13).

4. The fixed mold side mold clamping control mechanism of an injection mold according to claim 1, characterized in that: The fixed block (5) is provided with a slide groove (16), and the sliding block (8) cooperates with the slide groove (16).

5. The fixed mold side clamping control mechanism of an injection mold according to claim 4, characterized in that: The slide groove (16) is an I-shaped groove or a dovetail groove, and the corresponding slider (8) is an I-shaped slider or a dovetail slider.

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