Fixed mold tunnel core-pulling mechanism and injection mold

Abstract

The utility model discloses a fixed mold tunnel core-pulling mechanism and an injection mold, and the fixed mold tunnel core-pulling mechanism comprises a core-pulling piece which is in sliding fit with a fixed mold and can be inserted into a pitched roof arranged on a movable mold core along the horizontal direction; the protection pin is in sliding fit with the fixed mold and can be inserted into the fixed mold core in the horizontal direction; the core-pulling driving mechanism comprises a driving piece and a reversing block, the driving piece can drive the reversing block to move on the fixed mold in the vertical direction, the core-pulling piece and the protection pin are connected with the reversing block, and when the reversing block moves in the vertical direction, the core-pulling piece and the protection pin can be driven to move in the same direction. The protection pin is adopted to lock the fixed mold and the movable mold, during mold opening, through linkage control over the core-pulling piece and the protection pin by the reversing block, when the core-pulling piece is not pulled out of the inclined ejector, the protection pin locks the fixed mold and the movable mold all the time, collision and action between the core-pulling piece and the inclined ejector are prevented, and protection is provided for the core-pulling piece and the inclined ejector.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a fixed mold tunnel core pulling mechanism and an injection mold. Background Technology

[0002] In the fixed mold tunnel core-pulling mechanism, the core-pulling surface needs to extend into the corresponding structure of the moving mold for forming. In actual injection molding production, there are situations where the mold opens directly before the core-pulling structure of the fixed mold has retracted, causing the fixed mold core-pulling structure and the moving mold to collide and damage the mold. Replacing damaged parts is time-consuming and costly, and it will seriously affect the production progress and cycle. Utility Model Content

[0003] The purpose of this utility model is to provide a fixed mold tunnel core pulling mechanism and injection mold to solve the problem of mold damage caused by the collision between the moving mold core pulling structure and the moving mold in the tunnel core pulling mechanism.

[0004] This utility model is achieved through the following technical solution:

[0005] The fixed-mold tunnel core-pulling mechanism includes:

[0006] A core-pulling component, which slides with the fixed mold and can be inserted horizontally into an inclined ejector provided on the moving mold core;

[0007] A protective pin, which slides with the fixed mold and can be inserted into the fixed mold core in a horizontal direction;

[0008] The core-pulling drive mechanism includes a drive component and a reversing block. The drive component can drive the reversing block to move vertically on the fixed mold. The core-pulling component and the protective pin are connected to the reversing block, and when the reversing block moves vertically, they can drive the core-pulling component and the protective pin to move in the same direction.

[0009] In some embodiments, the reversing block has multiple slide rails arranged side by side along the direction of movement. One end of the core-pulling component and the protective pin are slidably connected to the slide rails. The slide rails are inclined along the direction of movement so that when the reversing block moves in the vertical direction, it can drive the core-pulling component and the protective pin to move in the horizontal direction.

[0010] In some embodiments, the core-pulling component is connected to the reversing block via a transition connector, and the transition connector is slidably connected to the slide rail.

[0011] A wedge groove is provided at the bottom of the T-shaped groove of the slide rail, and a wedge protrusion is provided at the end of the transition connector to cooperate with the wedge groove. When the wedge protrusion falls into the wedge groove, the wedge protrusion cooperates with the wedge groove to restrict the core pulling part from moving in the core pulling direction under the action of injection pressure.

[0012] The width of the groove on the transition connector that mates with the slide rail is greater than the thickness of the T-shaped track of the slide rail, so that it can provide clearance for the wedge-shaped protrusion to disengage from the wedge-shaped groove during core pulling.

[0013] In some embodiments, the wedge-shaped protrusion and the wedge-shaped groove are arranged in a vertical direction.

[0014] In some embodiments, a pad is provided at the bottom of the T-groove of the slide rail, and the wedge-shaped groove is provided on the pad.

[0015] In some embodiments, a fixing block is provided on one side of the fixed mold, and the reversing block is disposed inside the fixing block and slidably connected to the fixing block.

[0016] In some embodiments, the reversing block is provided with a travel stop block, and an upper travel switch and a lower travel switch are respectively provided on both sides of the travel stop block.

[0017] On the other hand, this utility model also provides an injection mold, including a moving mold, a fixed mold, and the fixed mold tunnel core pulling mechanism.

[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0019] Protective pins are used to lock the fixed mold and the moving mold. During mold opening, the core-pulling component and the protective pin are linked and controlled by the reversing block. When the core-pulling component is not pulled out from the slanted ejector, the protective pin always locks the fixed mold and the moving mold to prevent collision and action between the core-pulling component and the slanted ejector, thus providing protection for the core-pulling component and the slanted ejector.

[0020] By simultaneously driving the core-pulling component and the protective pin with a reversing block, the core-pulling component and the protective pin can move synchronously. The core-pulling mechanism and the injection mold have a simple structure and stable operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the fixed mold tunnel core-pulling mechanism in the injection mold according to an embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the vertical cross-section at the location of the core-pulling component.

[0024] Figure 3 for Figure 2 A partial schematic diagram of point A in the middle.

[0025] Figure 4 for Figure 1 A schematic diagram of the horizontal cross-section at the location of the core-pulling component.

[0026] Figure 5 for Figure 4 A partial schematic diagram of point B in the middle.

[0027] Figure 6 This is a schematic diagram of the cooperation structure between the fixed mold tunnel core pulling mechanism and the moving mold core in an embodiment of this utility model.

[0028] Figure 7 for Figure 6 A partial schematic diagram at point C.

[0029] Figure 8 This is a schematic diagram of the core-pulling mechanism for the fixed-mold tunnel according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of the core-pulling mechanism for the fixed-mold tunnel according to another embodiment of the present invention.

[0031] in:

[0032] 11. Fixed mold; 12. Moving mold core; 13. Angled ejector;

[0033] 21. Fixed block; 22. Reversing block; 221. Slide rail; 222. Wedge groove; 23. Core pulling part; 230. Transition connector; 231. Wedge protrusion; 24. Protective pin; 25. Pad block; 26. Upper limit block; 27. Lower limit block; 28. Stroke stop block.

[0034] 30. Driving components;

[0035] 41. Upper limit switch; 42. Lower limit switch;

[0036] D. Slide width; H. T-shaped track thickness. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0038] Reference Figure 1 In some embodiments of this example, the fixed-mold tunnel core-pulling mechanism includes:

[0039] The core-pulling component 23 slides with the fixed mold 11 and can be inserted horizontally into the inclined ejector 13 provided on the moving mold core 12; the two core-pulling components 23 respectively cooperate with the two inclined ejectors 13, and the cooperation between the core-pulling components and the inclined ejectors is used for injection molding of this part of the product.

[0040] Protective pin 24 is slidably fitted with fixed mold 11 and can be inserted into fixed mold core 12 in a horizontal direction;

[0041] The core-pulling drive mechanism includes a drive component 30 and a reversing block 22. The drive component 30 can drive the reversing block 22 to move vertically on the fixed mold. The core-pulling component 23 and the protective pin 24 are connected to the reversing block 22, and when the reversing block moves vertically, it can drive the core-pulling component and the protective pin to move in the same direction.

[0042] The core-pulling component 23 and the protective pin 24 pass through the fixed mold and slide together with it, so that the core-pulling component and the protective pin can only move horizontally along their axes.

[0043] When the protective pin is inserted into the fixed mold core, it can lock the moving mold and the fixed mold, restricting the opening of the moving mold and the fixed mold.

[0044] Setting the movement direction of the reversing block to be perpendicular to the movement direction of the core-pulling component and the protective pin can reduce the space required for mold operation.

[0045] In some embodiments, multiple slide rails 221 are arranged side by side on the reversing block 22 along the direction of movement. One end of the core-pulling member 23 and the protective pin 24 are slidably connected to the slide rails 221 respectively. The slide rails 221 are inclined along the direction of movement of the reversing block, so that when the reversing block moves in the vertical direction, it can drive the core-pulling member and the protective pin to move in the horizontal direction.

[0046] Reference Figure 2 During the core-pulling operation, the drive component drives the reversing block to move upward. Based on the inclined structure of the slide rail and the cooperation between the slide rail and the core-pulling component, the core-pulling component moves outward in the horizontal direction, thus pulling the core. Based on the same structure and operating principle, the reversing block drives the protective pin to move outward, pulling the protective pin out of the moving mold core, thus unlocking.

[0047] The slide rail 221 has a T-shaped groove, and the ends of the core-pulling component 23 and the protective pin 24 are engaged with the T-shaped groove. When the driving component moves in the vertical direction, it can drive the core-pulling component and the protective pin to move in the horizontal direction.

[0048] A fixing block 21 is provided on one side of the fixed mold 11, and a reversing block 22 is disposed within the fixing block 21 and slidably connected to the fixing block. By providing a fixing block on one side of the fixed mold, it is convenient to install the reversing block on the fixed mold and to facilitate the sliding connection between the two.

[0049] The driving component 30 can be a hydraulic cylinder, which is fixedly connected to the fixed mold.

[0050] In the fixed mold tunnel core pulling mechanism, the core pulling component, the protective pin, and their cooperation with the reversing block are designed so that when the core pulling component is completely pulled out, the protective pin is completely pulled out from the moving mold core, thus achieving core pulling protection for the core pulling component.

[0051] The sliding fit between the core-pulling component, the protective pin, and the slide rail enables the core-pulling component and the protective pin to move in the horizontal direction. During injection molding, the injection pressure applies a horizontal force to the core-pulling component. Based on the fit structure between the core-pulling component and the slide rail, the core-pulling component will push the reversing block to move under the action of the injection pressure, causing the core-pulling component to move in the core-pulling direction.

[0052] In order to solve the problem of core pulling component movement during injection molding, in some embodiments, the core pulling component 23 is connected to the reversing block 22 through the transition connecting block 230. At this time, the transition connecting block 230 and the slide rail 221 on the reversing block 22 are slidably connected.

[0053] A wedge groove 222 is provided at the bottom of the T-shaped groove of the slide rail 221, and a wedge protrusion 231 that cooperates with the wedge groove is provided at the end of the transition connector. When the wedge protrusion 231 falls into the wedge groove 222, the wedge protrusion 231 cooperates with the wedge groove 222 to restrict the core-pulling part from moving in the core-pulling direction under the action of injection pressure.

[0054] Reference Figure 3 During injection molding, the hydraulic cylinder pushes the reversing block to move, causing the end of the core-pulling component to extend into the moving mold core. At this time, the wedge-shaped protrusion falls exactly into the wedge-shaped groove, and the wedge-shaped protrusion and the wedge-shaped surface of the wedge-shaped groove cooperate, forming a mutual limiting relationship. When the core-pulling component is subjected to injection pressure, due to the limiting cooperation formed between the wedge-shaped protrusion and the wedge-shaped groove, the core-pulling component will be unable to push the reversing block to move, thus locking the core-pulling component in this position and restricting its movement in the core-pulling direction.

[0055] Accordingly, based on the arrangement of the wedge-shaped protrusion and wedge-shaped groove, to avoid the influence of the wedge-shaped protrusion and wedge-shaped groove on the core-pulling action, the width D of the groove on the transition connector that mates with the slide rail is set to be greater than the thickness H of the T-shaped track of the slide rail, so that space can be provided for the wedge-shaped protrusion to disengage from the wedge-shaped groove during core pulling. (Refer to...) Figure 5The wedge-shaped protrusion and the wedge-shaped groove are set vertically. During core pulling, the hydraulic cylinder drives the reversing block to move. The reversing block and the core pulling component move relative to each other, causing the wedge-shaped protrusion to gradually disengage from the wedge-shaped groove. During this process, due to the dimensional difference between the width of the slide groove and the thickness of the T-shaped track, space is provided for the reversing block and the transition connector to move relative to each other in the horizontal direction, so that the reversing block and the transition connector will not interfere with each other due to the setting of the wedge-shaped protrusion and the wedge-shaped groove.

[0056] In some embodiments, a pad 25 is provided at the bottom of the T-slot of the slide rail 221, and a wedge-shaped groove 222 is provided on the pad 25 accordingly. By providing the pad, the core-pulling component will not directly contact the reversing block at its end, avoiding the injection pressure from being directly applied to the bottom of the T-slot through the core-pulling component and causing damage to the bottom of the T-slot. The pad 25 and the reversing block 22 are connected by bolts, which facilitates the replacement of the pad.

[0057] The fixed block 21 is provided with an upper limit block 26 and a lower limit block 27 for limiting the movement position of the reversing block, which are used to provide limit protection for the movement of the core pulling component and the protective pin.

[0058] In some embodiments, a travel stop block 28 is provided on the reversing block 22, and an upper travel switch 41 and a lower travel switch 42 are respectively provided on both sides of the travel stop block to limit the movement stroke of the reversing block and provide limit protection for the movement of the core-pulling component and the protective pin. The travel stop block has an L-shaped structure, with one end fixedly connected to the reversing block and the other end extending cantilevered between the upper and lower travel switches. The upper and lower travel switches control the action of the hydraulic cylinder to control the movement stroke of the reversing block.

[0059] On the other hand, some embodiments of this utility model also provide an injection mold, which includes a moving mold, a fixed mold 11, and a fixed mold tunnel core-pulling mechanism. The moving mold includes a moving mold core 12, on which a slanted ejector 13 is provided. The slanted ejector 13 cooperates with the core-pulling component 23 in the core-pulling mechanism. By adopting this fixed mold tunnel core-pulling mechanism, the problem of collision and damage between the core-pulling component and the moving mold caused by the incomplete core-pulling action during mold opening can be solved.

[0060] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0062] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A fixed-mold tunnel core-pulling mechanism, characterized in that, include: A core-pulling component, which slides with the fixed mold and can be inserted horizontally into an inclined ejector provided on the moving mold core; A protective pin, which slides with the fixed mold and can be inserted into the fixed mold core in a horizontal direction; The core-pulling drive mechanism includes a drive component and a reversing block. The drive component can drive the reversing block to move vertically on the fixed mold. The core-pulling component and the protective pin are connected to the reversing block, and when the reversing block moves vertically, they can drive the core-pulling component and the protective pin to move in the same direction.

2. The fixed-mold tunnel core-pulling mechanism according to claim 1, characterized in that, Multiple slide rails are arranged side by side on the reversing block along the direction of movement. One end of the core-pulling component and the protective pin are slidably connected to the slide rails. The slide rails are inclined along the direction of movement so that when the reversing block moves in the vertical direction, it can drive the core-pulling component and the protective pin to move in the horizontal direction.

3. The fixed-mold tunnel core-pulling mechanism according to claim 2, characterized in that, The core-pulling component is connected to the reversing block through a transition connector, and the transition connector is slidably connected to the slide rail. A wedge groove is provided at the bottom of the T-shaped groove of the slide rail, and a wedge protrusion is provided at the end of the transition connector to cooperate with the wedge groove. When the wedge protrusion falls into the wedge groove, the wedge protrusion cooperates with the wedge groove to restrict the core pulling part from moving in the core pulling direction under the action of injection pressure. The width of the groove on the transition connector that mates with the slide rail is greater than the thickness of the T-shaped track of the slide rail, so that it can provide clearance for the wedge-shaped protrusion to disengage from the wedge-shaped groove during core pulling.

4. The fixed-mold tunnel core-pulling mechanism according to claim 3, characterized in that, The wedge-shaped protrusion and the wedge-shaped groove are arranged in the vertical direction.

5. The fixed-mold tunnel core-pulling mechanism according to claim 3, characterized in that, A pad is provided at the bottom of the T-shaped groove of the slide rail, and the wedge-shaped groove is provided on the pad.

6. The fixed-mold tunnel core-pulling mechanism according to claim 1 or 2, characterized in that, A fixed block is provided on one side of the fixed mold, and the reversing block is disposed inside the fixed block and is slidably connected to the fixed block.

7. The fixed-mold tunnel core-pulling mechanism according to claim 1 or 2, characterized in that, The reversing block is provided with a travel stop block, and an upper travel switch and a lower travel switch are respectively provided on both sides of the travel stop block.

8. An injection mold, characterized in that, It includes a moving mold, a fixed mold, and a fixed mold tunnel core-pulling mechanism as described in any one of claims 1-7.

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