A slide delay mechanism for injection molds

Abstract

The utility model provides a kind of for injection mold's line position delay mechanism, lateral slider is slidably fixed on B plate, including sequentially connected slope bottom, slope face and slope top, and line position delay hole including limiting vertical surface and guide slope is opened on slope bottom close to slope face, guide slope and slope face are all inclined with first angle, and oblique guide hole is opened on slope top, one end of core-pulling slider is fixed in the side of lateral slider, one end of baffle is fixed on A plate, and the other end is inserted in line position delay hole in pluggable manner, and the other end of baffle includes the delay vertical surface that can keep adhering with limiting vertical surface before lateral core-pulling in the side close to slope face, and the avoidance slope surface that is arranged in parallel with slope face, oblique guide column is slidably inserted oblique guide hole, and the axial direction of both is inclined with first angle, and oblique guide column has second height difference on the side close to slope face on oblique guide hole before mould opening, and second height difference is equal to first interval and not less than the first height difference of limiting vertical surface.

Description

Technical Field

[0001] This utility model belongs to the field of complex mold technology, and in particular relates to a slide delay mechanism for injection molds. Background Technology

[0002] like Figure 1 As shown, a common injection mold generally includes a front mold 80 and a rear mold 90. The front mold 80 includes a front mold fixing plate 81, an A plate 82, and a front mold core 83. The front mold fixing plate 81 and the A plate 82 are fixedly connected. The front mold core 83 is embedded and fixed on the A plate 82 on the side away from the front mold fixing plate 81. The rear mold 90 includes a B plate 91 and a rear mold core 92. The rear mold core 92 is embedded on the B plate 91 on the side close to the A plate 82. When the product is injected, the B plate 91 gradually moves away from the A plate 82 to complete the mold opening. Finally, the product left on the rear mold 90 is ejected to complete the demolding and obtain the molded part.

[0003] When the extension direction of the bosses, holes, and grooves of a product is inconsistent with the mold opening direction, a snap-fit ​​(undercut) will be formed. In this case, the mold needs to first add a core-pulling mechanism on the side so that the undercut can be disengaged. One of the most common mechanisms used is the inclined guide post side core-pulling structure.

[0004] However, existing lateral core-pulling structures with inclined guide pillars generally begin the lateral core-pulling action when the mold is opened. Some injection molded products have special structures that are prone to sticking to the front mold. Before lateral core-pulling, a certain gap needs to be opened in the mold first. Otherwise, the injection molded product is easily damaged by the slider. Therefore, how to achieve lateral delayed core-pulling in the lateral core-pulling structure with inclined guide pillars has become a problem that needs to be solved. Utility Model Content

[0005] The purpose of this invention is to solve the problem of how to achieve lateral delayed core pulling in a lateral core pulling structure for inclined guide pillars.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sliding delay mechanism for injection molds is used to first open the mold by a first distance along a first direction and then perform delayed core pulling in a second direction, the second direction being perpendicular to the first direction. The sliding delay mechanism includes: an A plate, a B plate, a front mold core, a rear mold core, a side slider, a core pulling slider, a stop block, and an inclined guide post. The front mold core is disposed within the A plate, and the rear mold core is disposed within the B plate. The side slider is slidably fixed on the B plate on the side closest to the A plate along the second direction. The side of the side slider away from the B plate includes sequentially connected ramps. The device comprises a bottom surface, a slope surface, and a top surface. A positioning delay hole is provided on the bottom surface, immediately adjacent to the slope surface. The side of the positioning delay hole adjacent to the slope surface includes a limiting vertical surface and a guide slope. The guide slope, the limiting vertical surface, and the slope surface are sequentially connected, and the guide slope and the slope surface are parallel and inclined at a first angle. The limiting vertical surface has a first height difference in the first direction. An inclined guide hole is provided on the top surface. One end of the core-pulling slider is fixed to the side of the lateral slider, and the other end of the core-pulling slider extends along a second direction. Used to form an injection cavity with the front mold core, rear mold core, and side slide block, one end of the stop block is fixed to the side of plate A near plate B, and the other end of the stop block can be inserted into the slide delay hole along the first direction. The side of the other end of the stop block near the ramp surface includes a delay vertical surface and a avoidance slope surface. The avoidance slope surface is set parallel to the ramp surface and is used to avoid obstruction when the ramp surface slides down. The limiting vertical surface and the delay vertical surface remain in contact with each other before the side core is pulled, and the limiting vertical surface and the delay vertical surface separate during the mold opening process. Then, the lateral slider begins to slide along the second direction and move away from the rear mold core under the action of the inclined guide post. One end of the inclined guide post is pressed and fixed on the side of plate A away from plate B by the front mold fixing plate. The other end of the inclined guide post can slide through the inclined guide hole. The axes of the inclined guide post and the inclined guide hole are parallel to each other and are both inclined at the first angle. Before the mold is opened, the inclined guide post and the side of the inclined guide hole near the slope surface have a second height difference in the first direction. The second height difference is equal to the first distance and the second height difference is greater than or equal to the first height difference.

[0008] Optionally, one end of the core-pulling slider is detachably fixed to the side of the lateral slider. Optionally, the second height difference is 1-2 mm greater than the first height difference.

[0009] Optionally, one end of the stop block is embedded and fixed on the side of plate A near plate B.

[0010] Optionally, one end of the stop block can be detachably fixed to the side of plate A near plate B.

[0011] Optionally, the guide ramp and the clearance ramp are fitted together before mold opening.

[0012] Optionally, a fixed plane, a reset slope, and a limiting plane are sequentially connected on the side of plate A near plate B. One end of the stop block is fixed on the fixed plane. The reset slope is inclined at a first angle. The reset slope and the slope surface fit together perfectly after the mold is closed. The limiting plane and the top surface of the slope fit together perfectly after the mold is closed.

[0013] Preferably, the reset ramp is composed of a removable wear-resistant block.

[0014] Preferably, the other end of the stop block leaves a gap with the bottom of the slide delay hole after the mold is closed.

[0015] Optionally, a guide rail is embedded on the side of plate B near plate A, and a lateral slider is slidably mounted on the guide rail in a second direction.

[0016] Compared with the prior art, the sliding delay mechanism for injection molds provided by this utility model has a simple structure, ingenious design, and good core pulling effect. It can effectively realize the lateral delayed core pulling of the inclined guide post lateral core pulling structure, which greatly improves the quality and production efficiency of injection molded products. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a commonly used injection mold.

[0019] Figure 2 This is a schematic diagram of the sliding delay mechanism for injection molds during mold closing, according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the sliding delay mechanism for injection molds when it begins lateral core pulling, according to an embodiment of the present invention. Detailed Implementation

[0021] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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.

[0023] Please refer to the reference. Figure 2 and Figure 3As shown, a sliding delay mechanism 100 for injection molds is used to first open the mold at a first distance along a first direction X and then perform delayed core pulling in a second direction Y. The second direction Y is perpendicular to the first direction X. The sliding delay mechanism 100 includes: A plate 1, B plate 2, front mold core 10, rear mold core 20, side slider 3, core pulling slider 4, stop block 5, and inclined guide post 6.

[0024] The front mold core 10 is set inside plate A 1.

[0025] The rear mold core 20 is set inside plate B 2.

[0026] The lateral slider 3 is slidably fixed on the side of plate B 2 near plate A 1 along the second direction Y. The side of the lateral slider 3 away from plate B 2 includes a bottom slope surface 31, a slope surface 32 and a top slope surface 33 connected in sequence. A positioning delay hole 34 is provided on the bottom slope surface 31 close to the slope surface 32. The side of the positioning delay hole 34 close to the slope surface 32 includes a limiting vertical surface 341 and a guide slope surface 342. The guide slope surface 342, the limiting vertical surface 341 and the slope surface 32 are connected in sequence, and the guide slope surface 342 and the slope surface 32 are arranged in parallel and are inclined at a first angle α. The limiting vertical surface 341 has a first height difference H in the first direction X. An inclined guide hole 331 is provided on the top slope surface 33.

[0027] One end of the core-pulling slider 4 is fixed to the side of the side slider 3, and the other end of the core-pulling slider 4 extends along the second direction Y to cooperate with the front mold core 10, the rear mold core 20 and the side slider 3 to form an injection cavity.

[0028] One end of the stop block 5 is fixed on the side of plate A 1 near plate B 2. The other end of the stop block 5 can be inserted into the slide delay hole 34 along the first direction X. The side of the other end of the stop block 5 near the ramp surface 32 includes a delay vertical surface 51 and a avoidance slope surface 52. The avoidance slope surface 52 is set parallel to the ramp surface 32 and is used to avoid the ramp surface 32 when it slides down. The limiting vertical surface 341 and the delay vertical surface 51 are kept in contact with each other before the side core is pulled. After the limiting vertical surface 341 and the delay vertical surface 51 are separated during the mold opening process, the side slider 3 begins to slide along the second direction Y and away from the rear mold core 20 under the action of the inclined guide post 6.

[0029] One end of the inclined guide post 6 is pressed and fixed on the side of plate A 1 away from plate B 2 by the front mold fixing plate 7. The other end of the inclined guide post 6 is slidably inserted through the inclined guide hole 331. The axial directions of the inclined guide post 6 and the inclined guide hole 331 are parallel to each other and are both inclined at the first angle α. Before the mold is opened, the inclined guide post 6 and the side of the inclined guide hole 331 near the slope surface 32 have a second height difference M in the first direction X. The second height difference M is equal to the first spacing and the second height difference M is greater than or equal to the first height difference H.

[0030] Optionally, one end of the core-pulling slider 4 can be detachably fixed to the side of the lateral slider 3. This facilitates the disassembly and maintenance of the core-pulling slider 4.

[0031] Optionally, the second height difference M is 1-2 mm greater than the first height difference H. This effectively prevents the inclined guide post 6 from damaging the slider, thereby reducing the core-pulling stroke and improving injection molding efficiency.

[0032] Optionally, one end of the stop block 5 is embedded and fixed on the side of plate A 1 near plate B 2. This makes the stop block 5 more securely fixed.

[0033] Optionally, one end of the stop block 5 can be detachably fixed to the side of plate A 1 near plate B 2. This facilitates the disassembly and maintenance of the stop block 5.

[0034] Optionally, the guide ramp 342 and the clearance ramp 52 are fitted together before mold opening. This facilitates the guiding and positioning of the side slider 3 when the mold is closed.

[0035] Optionally, plate A1 has a fixed plane 11, a reset slope 12, and a limiting plane 13 connected in sequence on the side near plate B2. One end of the stop block 5 is fixed to the fixed plane 11. The reset slope 12 is inclined at a first angle α. The reset slope 12 and the slope surface 32 fit together perfectly after mold closing. The limiting plane 13 and the top surface 33 also fit together perfectly after mold closing. This facilitates the mold closing and reset of the side slider 3.

[0036] Preferably, the reset slope 12 is composed of a removable wear-resistant block 121. This facilitates disassembly and maintenance.

[0037] Preferably, the other end of the stop block 5 leaves a gap with the bottom of the slide delay hole 34 after the mold is closed. This makes it less likely to hinder the fit between the limiting plane 13 and the slope top surface 33 during mold closing, thus achieving precise resetting.

[0038] Optionally, a guide rail 21 is embedded on the side of plate B 2 near plate A 1, and the lateral slider 3 is slidably mounted on the guide rail 21 along the second direction Y. This facilitates smooth sliding of the slider and reduces friction with plate B 2.

[0039] The operating principle of the sliding delay mechanism 100 for injection molds of this utility model is as follows:

[0040] When the mold is opened, the B plate 2 drives the side slider 3 to move away from the A plate 1 along the first direction X. At this time, the side slider 3 remains stationary in the second direction Y under the action of the delay vertical surface 51 of the stop block 5. When the B plate 2 moves away from the A plate 1 to the first distance, the limiting vertical surface 341 and the delay vertical surface 51 have separated. At this time, the side slider 3 starts to drive the core pulling slider 4 to move along the second direction Y under the action of the inclined guide post 6 to perform side core pulling.

[0041] When the mold is closed, plate B2 drives the side slider 3 to approach plate A1 along the first direction X. When the inclined guide post 6 is inserted into the inclined guide hole 331 of the side slider 3, the side slider 3 slides along the second direction Y under the combined guiding action of the stop block 5's clearance inclined surface 52, the delay vertical surface 51, and the inclined guide post 6, thereby driving the core-pulling slider 4 to approach the rear mold core 20 until the mold is closed.

[0042] The sliding delay mechanism for injection molds provided by this utility model has a simple structure, ingenious design, and good core-pulling effect. It can effectively realize the lateral delayed core-pulling of the inclined guide post lateral core-pulling structure, which greatly improves the quality and production efficiency of injection molded products.

[0043] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A sliding delay mechanism for an injection mold, used for first opening the mold a first distance along a first direction and then performing delayed core pulling in a second direction, the second direction being perpendicular to the first direction, characterized in that, The sliding delay mechanism includes: plate A, plate B, front mold core, rear mold core, side slider, core-pulling slider, stop block, inclined guide pillar and front mold fixing plate; The front mold core is located inside the A plate; The rear mold core is located inside the B plate; The lateral slider is slidably fixed on the side of plate B near plate A along the second direction. The side of the lateral slider away from plate B includes a bottom surface, a slope surface, and a top surface connected in sequence. A positioning delay hole is provided on the bottom surface of the slope surface close to the slope surface. The side of the positioning delay hole close to the slope surface includes a limiting vertical surface and a guide slope surface. The guide slope surface, the limiting vertical surface, and the slope surface are connected in sequence, and the guide slope surface and the slope surface are arranged parallel to each other and are inclined at a first angle. The limiting vertical surface has a first height difference in the first direction. An inclined guide hole is provided on the top surface of the slope. One end of the core-pulling slider is fixed to the side of the lateral slider, and the other end of the core-pulling slider extends along the second direction to cooperate with the front mold core, the rear mold core and the lateral slider to form an injection cavity; One end of the stop block is fixed to the side of the A plate near the B plate, and the other end of the stop block can be inserted into the sliding delay hole in the first direction. The side of the other end of the stop block near the ramp surface includes a delay vertical surface and a avoidance slope surface. The avoidance slope surface is arranged parallel to the ramp surface and is used to avoid the ramp surface when it slides down. The limiting vertical surface and the delay vertical surface are kept in contact with each other before the lateral core is pulled. After the limiting vertical surface and the delay vertical surface are separated during the mold opening process, the lateral slider begins to slide in the second direction and move away from the rear mold core under the action of the inclined guide post. One end of the inclined guide post is pressed and fixed on the side of plate A away from plate B by the front mold fixing plate. The other end of the inclined guide post is slidably passed through the inclined guide hole. The axial directions of the inclined guide post and the inclined guide hole are parallel to each other and are both inclined at a first angle. Before the mold is opened, the inclined guide post and the side of the inclined guide hole near the slope have a second height difference in the first direction. The second height difference is equal to the first distance and the second height difference is greater than or equal to the first height difference.

2. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, One end of the core-pulling slider is detachably fixed to the side of the lateral slider.

3. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, The second height difference is 1-2 mm greater than the first height difference.

4. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, One end of the stop block is embedded and fixed on the side of plate A near plate B.

5. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, One end of the stop block is detachably fixed to the side of plate A near plate B.

6. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, The guide ramp and the clearance ramp fit together before mold opening.

7. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, On the side of plate A near plate B, there are a fixed plane, a reset slope and a limiting plane connected in sequence. One end of the stop block is fixed on the fixed plane. The reset slope is inclined along the first angle. The reset slope and the slope surface fit together after the mold is closed. The limiting plane and the top surface of the slope fit together after the mold is closed.

8. The sliding delay mechanism for injection molds as described in claim 7, characterized in that, The reset ramp is made of removable wear-resistant blocks.

9. The sliding delay mechanism for injection molds as described in claim 7, characterized in that, The other end of the stop block leaves a gap with the bottom of the slide delay hole after the mold is closed.

10. The sliding delay mechanism for injection molds as described in claim 1, characterized in that, A guide rail is embedded on the side of plate B near plate A, and the lateral slider is slidably mounted on the guide rail in the second direction.

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