Injection mold core pulling first fixed structure

Abstract

The present invention discloses a core-pulling fixed structure for an injection mold, comprising a first core-pulling unit and a second core-pulling unit arranged on a rear mold and an inclined guide column arranged on a front mold, wherein the first core-pulling unit comprises a mounting seat, a first slider, a core-pulling and slider driving mechanism, the mounting seat is fixed on the rear mold, and the first slider is slidably matched with the mounting seat. The slider driving mechanism is connected to the first slider and drives it to move, and the core-pulling is arranged at the other end of the first slider. The inclined guide column comprises a special-shaped inclined guide column and a common inclined guide column, and the special-shaped inclined guide column drives the first slider to move. The second core-pulling unit comprises a second slider and a slider head, the slider head is arranged on a side of the second slider close to the core-pulling, and the common inclined guide column drives the second slider to move. The present invention utilizes the larger mechanical force of the injection molding machine to realize the separation of the core-pulling and the fuel distribution pipe, and the slider head positions the core-pulling, eliminates the interference of uneven injection pressure on the core-pulling, and improves the product qualification rate and production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a core-pulling and pre-fixing structure of an injection mold. Background Art

[0002] The automobile fuel distribution pipe is injection molded by a mold. It is about 3 meters long and hollow inside. After the fuel distribution pipe is molded in the cavity, it has a large contact area with the core pull and a strong clamping force. The core pull is set on the back mold. Before the fuel distribution pipe is taken out of the mold, the core pull needs to be withdrawn from the fuel distribution pipe. The withdrawal of the core pull from the fuel distribution pipe is driven by the core pull cylinder. Before the core pull moves relative to the fuel distribution pipe, the clamping force of the fuel distribution pipe on the core pull is too large, resulting in the core pull cylinder alone being unable to drive the core pull to withdraw. Therefore, another larger driving force is required to drive the slider connected to the core pull to move. In addition, the core pull is in a cantilever state in the mold cavity of the mold. Due to its long length, the uneven pressure in the cavity during the injection molding process can easily cause the core pull to deviate to one side in the cavity, resulting in the finished fuel distribution pipe not meeting the quality requirements. Therefore, the core pull needs to be fixed to ensure the product qualification rate. Therefore, the existing technology needs to be further improved. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to propose a structure for fixing the core pulling of the injection mold first, so as to solve the problem that the core pulling and the fuel distribution pipe are difficult to separate because the pulling force of the core pulling cylinder is smaller than the clamping force of the fuel distribution pipe on the core pulling. In addition, during the injection molding process, the core pulling is biased to one side in the cavity due to the uneven pressure in the cavity, resulting in the problem that the fuel distribution pipe does not meet the quality requirements.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] The injection mold core pulling first fixed structure includes a first core pulling unit and a second core pulling unit arranged on the rear mold and an inclined guide column arranged on the front mold. The second core pulling unit is located on the side where the first core pulling unit is located. The first core pulling unit includes a mounting seat, a first slider, a core pulling and a slider driving mechanism. The mounting seat is fixed on the rear mold, and the first slider is arranged on the upper part of the mounting seat and slidably cooperates with it. The slider driving mechanism is connected to one end of the first slider and drives it to move. The core pulling is arranged at the other end of the first slider. The inclined guide column includes two types, one of which is a special-shaped inclined guide column and the other is a common inclined guide column. The special-shaped inclined guide column cooperates with the first slider and drives it to move. The second core pulling unit includes a second slider and a slider head. The second slider is slidably connected to the rear mold. The slider head is arranged on the side of the second slider close to the core pulling and is plug-connected with the core pulling. The common inclined guide column cooperates with the second slider and drives it to move.

[0006] Preferably, the bottom of the first slider and the second slider are both provided with a wear-resistant plate, the wear-resistant plate below the first slider is fixed on the mounting seat, and the wear-resistant plate below the second slider is fixed on the rear mold. The bottom of the first slider and the second slider are both provided with a limit clip, and the limit clip is installed on the wear-resistant plate.

[0007] Preferably, the first slider and the second slider are located on both sides of the moving direction thereof, and are both provided with slider pressing plates, and the slider pressing plates are slidably matched with the corresponding sides of the first and second sliders.

[0008] Preferably, the cross section of the special-shaped oblique guide column is square, and is formed integrally by a vertical portion and an inclined portion. The extension direction of the vertical portion is consistent with the mold opening direction of the front mold, and the inclined portion is bent relative to the vertical portion toward one side of the movement direction of the first slider.

[0009] Preferably, a special-shaped inclined guide column cavity is provided inside the first slider to match the special-shaped inclined guide column, and the vertical section of the special-shaped inclined guide column cavity is a right-angled trapezoidal structure. One side of the special-shaped inclined guide column cavity is a straight inner wall to match the vertical part of the special-shaped inclined guide column, and the other side is an inclined inner wall to match the inclined part of the special-shaped inclined guide column. In the mold closing state, a section of the vertical part of the special-shaped inclined guide column is located inside the special-shaped inclined guide column cavity.

[0010] Preferably, the cross section of the common oblique guide post is circular, the angle between its extension direction and the opening direction of the front mold is an acute angle, and a common oblique guide post cavity matching with the common oblique guide post is provided in the second sliding block.

[0011] Preferably, the slider driving mechanism includes a core-pulling cylinder and a pull rod, the core-pulling cylinder is fixed to the bottom of the mounting seat, and its telescopic end is connected to one end of the pull rod through a fixed block. The other end of the pull rod is connected to the first slider, and a guide sleeve is provided on the mounting seat, and the guide sleeve is slidably matched with the pull rod.

[0012] Preferably, the mounting seat is provided with a first travel switch and a second travel switch, the first travel switch is located on one side of the first slider stroke, the second travel switch is located at the end of the first slider stroke, and the first slider is provided with a rod body that cooperates with the first and second travel switches.

[0013] Preferably, a slider limit block is provided at one end of the mounting seat located at the first slider stroke, and a slider limit block is also provided at one end of the rear mold located at the second slider stroke.

[0014] Preferably, one end of all the inclined guide pins is fixedly connected to the front mold, and one end of the core pulling is detachably fixedly connected to the first sliding block via a core pulling seat.

[0015] By adopting the above technical scheme, the beneficial technical effect of the present invention is as follows: the present invention designs the first slider and the special-shaped inclined guide column, and utilizes the larger mechanical force of the injection molding machine to drive the core pulling movement, thereby realizing the separation of the core pulling and the fuel distribution pipe. In addition, the ordinary inclined guide column drives the slider head to position the core pulling, thereby eliminating the interference of uneven injection pressure on the core pulling, thereby improving the product qualification rate and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the fuel distribution pipe pointed out in the background technology.

[0017] Figure 2 It is a schematic diagram of the structural principle of the injection mold core-pulling and pre-fixing structure of the present invention.

[0018] Figure 3 It is a bottom view structural schematic diagram of the core-pulling and first fixing structure of the injection mold of the present invention.

[0019] Figure 4 It is a schematic diagram of the installation state of the injection mold core-pulling first fixing structure of the present invention on the rear mold.

[0020] Figure 5 yes Figure 1 A structural schematic diagram of a certain part thereof shows a first sliding block and a special-shaped oblique guide column. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings:

[0022] Combination Figures 2 to 5 The injection mold core pulling first fixed structure includes a first core pulling unit 1 and a second core pulling unit 2 arranged on the rear mold and an inclined guide column arranged on the front mold. The second core pulling unit 2 is located on one side of the first core pulling unit 1. The first core pulling unit 1 includes a mounting seat 11, a first slider 12, a core pulling 13 and a slider driving mechanism 3. The mounting seat 11 is fixed on the rear mold, the first slider 12 is arranged on the upper part of the mounting seat 11, and a wear-resistant plate 14 is provided at the bottom of the first slider 12. The wear-resistant plate 14 located below the first slider 12 is fixed on the mounting seat 11, and the first slider 12 is slidably matched with the wear-resistant plate 14 below it.

[0023] The first slider 12 is symmetrically provided with slider pressure plates 15 on both sides of its moving direction. The slider pressure plates 15 on both sides of the first slider 12 are fixedly connected to the mounting seat 11. The first slider 12 slides with the slider pressure plates 15 on both sides. The slider pressure plates 15 on both sides of the first slider 12 restrict it from sliding in a straight line. The bottom of the first slider 12 is provided with a limit clamp 16, which is installed on the wear-resistant plate 14 below the first slider 12. The limit clamp 16 can be inserted into the card slot at the bottom of the first slider 12 to limit its sliding stroke relative to the wear-resistant plate 14. The mounting seat 11 is provided with a slider limit block 17 at one end of the stroke of the first slider 12. In the event that the limit clamp 16 fails, it can prevent the first slider 12 from continuing to slide under its gravity and colliding with other components to cause damage or destruction.

[0024] The slider driving mechanism 3 is connected to one end of the first slider 12, and drives the first slider 12 to move in the direction constrained by the slider pressure plate 15. The core pulling 13 is located at the end of the first slider 12 opposite to the slider driving mechanism 3. The core pulling 13 is a slender rod-shaped structure, one end of which is detachably fixedly connected to the first slider 12 through the core pulling seat 18, forming a structure similar to a cantilever beam. The slider driving mechanism 3 includes a core pulling cylinder 31 and a pull rod 32. The core pulling cylinder 31 is fixed to the bottom of the mounting seat 11, and a fixed block 33 is installed at its telescopic end. The pull rod 32 is located on one side of the core pulling cylinder 31, and a guide rod 34 is provided on the other side of the core pulling cylinder 31. The guide rod 34 is parallel to the pull rod 32, and one end of the guide rod 34 and the pull rod 32 are both connected to the fixed block 33.

[0025] The guide sleeve 35 is provided outside the guide rod 34 and the pull rod 32. The guide sleeve 35 outside the pull rod 32 is fixed on the mounting seat 11, and the guide sleeve 35 outside the guide rod 34 is fixed on the rear mold. The telescopic end of the core-pulling cylinder 31 drives the guide rod 34 and the pull rod 32 to move relative to the guide sleeve 35 outside each of them through the fixed block 33. The guide rod 34 plays a balancing and guiding role when the fixed block 33 drives the pull rod 32 to move. The mounting seat 11 is provided with a first travel switch 6 and a second travel switch 7. The first travel switch 6 is located on one side of the travel of the first slider 12, and the second travel switch 7 is located at the end of the travel of the first slider 12. The first slider 12 is provided with a rod body 121 that matches the first travel switch 6 and the second travel switch 7. When the rod body 121 moves with the first slider 12, it can contact the first travel switch 6 and the second travel switch 7 respectively.

[0026] The oblique guide pillars include two types, one of which is a special-shaped oblique guide pillar 4 and the other is a common oblique guide pillar 5. One end of the special-shaped oblique guide pillar 4 and the common oblique guide pillar 5 are both fixedly connected to the front mold. The cross section of the special-shaped oblique guide pillar 4 is square, and is formed in one piece by a vertical part and an inclined part. The extension direction of the vertical part is consistent with the mold opening direction of the front mold, and the inclined part is bent relative to the vertical part to one side of the movement direction of the first slider 12. The special-shaped oblique guide pillar 4 cooperates with the first slider 12 and drives it to move. Specifically, a special-shaped oblique guide pillar cavity 122 that cooperates with the special-shaped oblique guide pillar 4 is provided inside the first slider 12, and the vertical section of the special-shaped oblique guide pillar cavity 122 is a right-angled trapezoidal structure. One side of the special-shaped oblique guide pillar cavity 122 is a straight inner wall that cooperates with the vertical part of the special-shaped oblique guide pillar 4, and the other side is an inclined inner wall that cooperates with the inclined part of the special-shaped oblique guide pillar 4. In the mold closing state, a section of the vertical portion of the special-shaped inclined guide pillar 4 is located inside the special-shaped inclined guide pillar cavity 122 .

[0027] The second core pulling unit 2 includes a second slider 21 and a slider head 22. The second slider 21 is slidably connected to the rear mold. The bottom of the second slider 21 is also provided with a wear-resistant plate 14. The wear-resistant plate 14 located below the second slider 21 is fixed on the rear mold. The second slider 21 is also symmetrically provided with slider pressure plates 15 on both sides of its movement direction. The slider pressure plates 15 on both sides of the second slider 21 are fixedly connected to the rear mold. The second slider 21 is slidably matched with the slider pressure plates 15 on both sides of it. The slider pressure plates 15 on both sides of the second slider 21 limit its sliding in a straight line direction. The bottom of the second slider 21 is also provided with a limit clip 16. The limit clip 16 is installed on the wear-resistant plate 14 located below the second slider 21. The limit clip 16 can be inserted into the card slot at the bottom of the second slider 21 to limit its sliding stroke relative to the wear-resistant plate 14. The rear mold is also provided with a slider limit block 17 at one end of the stroke of the second slider 21.

[0028] There are four slider heads 22, which are fixed in sequence on one side of the second slider 21 close to the core pull 13. The end of the slider head 22 can be connected to the plug of the core pull 13, which plays a positioning role for the core pull 13, and prevents the core pull 13 from deviating to one side due to uneven pressure in the cavity during the injection molding process, resulting in unqualified products after molding. The cross section of the ordinary inclined guide column 5 is circular, and the angle between its extension direction and the opening direction of the front mold is an acute angle. The second slider 21 is provided with an ordinary inclined guide column 5 cavity that matches the ordinary inclined guide column 5. One end of the ordinary inclined guide column 5 is fixedly connected to the front mold, and the other end can be in the cavity of the ordinary inclined guide column 5, matching with the second slider 21 and driving it to move.

[0029] The working principle of the present invention is as follows: after the product is formed in the cavity formed by the front mold and the rear mold, before the front mold and the rear mold are opened, the front mold drives all the inclined guide pillars to move relative to the rear mold, and the ordinary inclined guide pillar 5 first drives the second slider 21 to retreat, and the ends of the four slider heads 22 fixed on the second slider 21 are separated from the core puller 13 and withdraw from the product. When the vertical part of the special-shaped inclined guide pillar 4 withdraws from the special-shaped inclined guide pillar cavity 122 of the first slider 12, its inclined part drives the first slider 12 to retreat, and under the driving force of the first slider 12, the outer wall of the core puller 13 is separated from the inner wall of the product, and the first slider 12 drives the core puller 13 to continue to retreat. When the special-shaped inclined guide column 4 separates from the first slider 12, the rod body 121 arranged on the first slider 12 contacts the first stroke switch 6, and the first stroke switch 6 sends a signal to the core pulling cylinder 31. The core pulling cylinder 31 drives the first slider 12 to continue to move backward through the pull rod 32. During the movement of the first slider 12 driven by the special-shaped inclined guide column 4, the core pulling cylinder 31 is in an unpowered state. After the first slider 12 drives the core pulling 13 to completely withdraw from the product, the rod body 121 arranged on the first slider 12 contacts the second stroke switch 7, and the second stroke switch 7 sends a signal to the core pulling cylinder 31. The first slider 12 stops moving, and the robot takes the product out of the back mold.

[0030] Before the front mold and the rear mold are closed, the core-pulling cylinder 31 drives the first slider 12 to move forward through the pull rod 32, and the core-pulling 13 moves with the first slider 12. When the first slider 12 moves to the point where the rod 121 provided on the first slider 12 contacts the first travel switch 6, the first travel switch 6 sends a signal to the core-pulling cylinder 31, the first slider 12 stops moving, the front mold and the rear mold are closed, and the special-shaped oblique guide pillar 4 is first inserted into the special-shaped oblique guide pillar cavity 122 of the first slider 12. During the insertion process, the special-shaped oblique guide pillar 4 drives the first slider 12 to continue moving forward. When the inclined portion of the special-shaped oblique guide pillar 4 is completely inserted into the special-shaped oblique guide pillar cavity 122 of the first slider 12, the first slider 12 stops moving. The front mold and the rear mold continue to close the mold, the ordinary inclined guide column 5 is inserted into the second slider 21, and the second slider 21 is driven to approach the core pulling 13. After the front mold and the rear mold are closed, the ends of the four slider heads 22 arranged on the second slider 21 are inserted into the core pulling 13 to realize the positioning of the core pulling 13.

[0031] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A core-pulling fixed structure for an injection mold, comprising a first core-pulling unit and a second core-pulling unit provided on a rear mold and an inclined guide column provided on a front mold, characterized in that: The second core pulling unit is located on one side of the first core pulling unit, and the first core pulling unit includes a mounting seat, a first slider, a core pulling and a slider driving mechanism, wherein the mounting seat is fixed on the rear mold, and the first slider is arranged on the upper part of the mounting seat and slidably cooperates with the mounting seat; the slider driving mechanism is connected to one end of the first slider and drives it to move, and the core pulling is arranged at the other end of the first slider; the inclined guide pillars include two types, one of which is a special-shaped inclined guide pillar, and the other is an ordinary inclined guide pillar, the special-shaped inclined guide pillar cooperates with the first slider and drives it to move; the second core pulling unit includes a second slider and a slider head, the second slider is slidably connected to the rear mold, and four slider heads are arranged in sequence and fixedly at intervals on one side of the second slider close to the core pulling, and the end of the slider head is connected to the core pulling plug, which plays a positioning role in the core pulling; the ordinary inclined guide pillar cooperates with the second slider and drives it to move; The slider driving mechanism includes a core-pulling cylinder and a pull rod. The core-pulling cylinder is fixed at the bottom of the mounting seat, and its telescopic end is connected to one end of the pull rod through a fixed block; the pull rod is located on one side of the core-pulling cylinder, and the other end of the pull rod is connected to the first slider. A guide sleeve is provided on the mounting seat, and the guide sleeve is slidably matched with the pull rod; The mounting seat is provided with a first travel switch and a second travel switch, the first travel switch is located at one side of the first slider travel, the second travel switch is located at the end of the first slider travel, and the first slider is provided with a rod body matched with the first and second travel switches; The cross section of the special-shaped oblique guide column is square, and is formed integrally by a vertical portion and an inclined portion; the extension direction of the vertical portion is consistent with the mold opening direction of the front mold, and the inclined portion is bent relative to the vertical portion toward one side of the movement direction of the first slider; A special-shaped inclined guide column cavity matching with the special-shaped inclined guide column is provided inside the first sliding block, and the vertical section of the special-shaped inclined guide column cavity is a right-angled trapezoidal structure; one side of the special-shaped inclined guide column cavity is a straight inner wall matching with the vertical part of the special-shaped inclined guide column, and the other side is an inclined inner wall matching with the inclined part of the special-shaped inclined guide column; in the mold closing state, a section of the vertical part of the special-shaped inclined guide column is located inside the special-shaped inclined guide column cavity; The cross section of the common oblique guide post is circular, and the angle between its extension direction and the mold opening direction of the front mold is an acute angle. The second sliding block is provided with a common oblique guide post cavity that matches the common oblique guide post. After the product is formed in the cavity formed by the front mold and the rear mold, before the front mold and the rear mold are opened, the front mold drives all the inclined guide pins to move relative to the rear mold, and the ordinary inclined guide pin first drives the second slider to retreat, and the ends of the four slider heads fixed on the second slider are separated from the core pulling and withdraw from the product; when the vertical part of the special-shaped inclined guide pin exits the special-shaped inclined guide pin cavity of the first slider, its inclined part drives the first slider to retreat, and under the driving force of the first slider, the outer wall of the core pulling is separated from the inner wall of the product, and the first slider drives the core pulling to continue to retreat; when the special-shaped inclined guide pin When the guide column is separated from the first slider, the rod body arranged on the first slider contacts the first stroke switch, the first stroke switch sends a signal to the core-pulling cylinder, and the core-pulling cylinder drives the first slider to continue to move backward through the pull rod. During the process of the special-shaped inclined guide column driving the first slider to move, the core-pulling cylinder is in a powerless state. After the first slider drives the core-pulling to completely withdraw from the product, the rod body arranged on the first slider contacts the second stroke switch, the second stroke switch sends a signal to the core-pulling cylinder, the first slider stops moving, and the manipulator takes the product out of the rear mold; Before the front mold and the rear mold are closed, the core-pulling cylinder drives the first slider to move forward through the pull rod, and the core-pulling moves with the first slider; when the first slider moves to the point where the rod body set on the first slider contacts the first stroke switch, the first stroke switch sends a signal to the core-pulling cylinder, the first slider stops moving, and the front mold and the rear mold are closed; the special-shaped inclined guide pin is first inserted into the special-shaped inclined guide pin cavity of the first slider, and during the insertion process, the special-shaped inclined guide pin drives the first slider to continue to move forward, and when the inclined part of the special-shaped inclined guide pin is completely inserted into the special-shaped inclined guide pin cavity of the first slider, the first slider stops moving; the front mold and the rear mold continue to be closed, the ordinary inclined guide pin is inserted into the second slider, and the second slider is driven to approach the core-pulling, and after the front mold and the rear mold are closed, the ends of the four slider heads set on the second slider are inserted into the core-pulling to achieve positioning of the core-pulling.

2. The injection mold core-pulling and fixing structure according to claim 1, characterized in that: The bottom of the first slider and the second slider are both provided with wear-resistant plates, the wear-resistant plate located below the first slider is fixed on the mounting seat, and the wear-resistant plate located below the second slider is fixed on the rear mold; the bottom of the first slider and the second slider are both provided with limit clips, and the limit clips are installed on the wear-resistant plates.

3. The injection mold core-pulling and fixing structure according to claim 1, characterized in that: The first slider and the second slider are located on both sides of the moving direction thereof, and are both provided with slider pressing plates, which are slidably matched with the corresponding sides of the first slider and the second slider.

4. The injection mold core-pulling and fixing structure according to claim 1, characterized in that: A slider limit block is provided at one end of the mounting seat located at the first slider stroke, and a slider limit block is also provided at one end of the rear mold located at the second slider stroke.

5. The injection mold core-pulling and fixing structure according to claim 1, characterized in that: One end of all the inclined guide pins is fixedly connected to the front mold, and one end of the core pulling is detachably fixedly connected to the first sliding block through a core pulling seat.

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