Double-layer sliding block structure

Abstract

The invention belongs to the field of automobile injection molds, and particularly relates to a double-layer sliding block structure which comprises a first sliding block, a first pressing strip, a limiting screw, a second sliding block, a second pressing strip, a limiting block, a first inclined guide column and a second inclined guide column. A limiting screw is fixed to the inclined face of the second sliding block and located behind the first sliding block to stop the first sliding block from sliding, the two sides of the second sliding block are in contact with the second pressing strip, the second sliding block slides backwards, a limiting block is arranged behind the second sliding block to stop the second sliding block from sliding, and the lower end of a first inclined guide column inclines backwards and sequentially penetrates through the first sliding block and the second sliding block. The lower end of the second inclined guide column inclines backwards and penetrates through the rear portion of the second sliding block. A delay structure is designed on the second sliding block, so that the first sliding block is opened firstly, then the first sliding block and the second sliding block are demolded at the same time, and the demolding action in the two directions is completed.

Description

Technical Field

[0001] The present invention belongs to the field of automotive injection molds, and particularly relates to a double-layer slider structure. Background Art

[0002] For a plastic mold product, if there are two undercuts in different directions on one side of the slider, currently, one undercut adopts the structure of a slider and an inclined guide pillar, and the other undercut generally adopts the structure of an oil cylinder core-pulling. As Figure 1 shown, due to the limitations of the product features and relatively high dimensional requirements here, the other undercut generally adopts the structure of an oil cylinder core-pulling. However, affected by the injection force, the oil cylinder core-pulling is not very stable, and flash and step differences are likely to occur in the product; if a self-locking oil cylinder core-pulling is designed for the mold, the cost is relatively high. Currently, there is an urgent need for a method with stable structure, convenient disassembly and assembly, good product clamping line quality, and relatively low price to solve this problem. Summary of the Invention

[0003] To solve the above problems existing in the prior art, the present invention provides a double-layer slider structure, and a delay structure is designed on the second slider, so that the first slider is first demolded, and then the first slider and the second slider are simultaneously demolded to complete the demolding actions in two directions.

[0004] To achieve the above object, the present invention provides the following technical solution: A double-layer slider structure includes a first slider, a first pressing strip, a limit screw, a second slider, a second pressing strip, a limit block, a first inclined guide pillar, and a second inclined guide pillar. The two sides of the first slider are limited on the upper front side of the second slider through the first pressing strip, and the first slider slides along the inclined surface on the second slider. The limit screw is fixed on the inclined surface of the second slider and is located behind the first slider to block the sliding of the first slider. The two sides of the second slider also contact the second pressing strip, and the second slider slides backward. A limit block is arranged behind the second slider to block the sliding of the second slider. The lower end of the first inclined guide pillar inclines backward and sequentially penetrates through the first slider and the second slider. The lower end of the second inclined guide pillar inclines backward and penetrates through the rear part of the second slider. When the mold is opened, the first inclined guide pillar and the second inclined guide pillar move upward simultaneously. At this time, the first inclined guide pillar drives the first slider to slide along the inclined surface on the second slider until the first slider is limited by the limit screw and the second slider remains stationary; then, the first inclined guide pillar and the second inclined guide pillar drive the first slider and the second slider to slide backward simultaneously until the second slider is limited by the limit block.

[0005] Further, a groove adapted to the first slider is arranged on the upper front side of the second slider. The bottom surface of the groove is an inclined surface. The upper surfaces of the two sides of the first slider contact the side edges of the bottom surface of the first pressing strip, and the first pressing strip is obliquely fixed on both sides of the groove. An inclined hole one with the same diameter as the first inclined guide pillar is arranged on the first slider. An inclined hole two is arranged at the groove of the second slider. The first inclined guide pillar penetrates through the inclined hole one and the inclined hole two, and the diameter of the inclined hole two is larger than that of the inclined hole one.

[0006] Further, an inclined hole three is provided at the rear part of the second slider, and the second inclined guide post penetrates through the inclined hole three, and the diameter of the inclined hole three is larger than that of the second inclined guide post.

[0007] Further, a notch one adapted to the limit screw is provided at the bottom of the rear side of the first slider, and a notch two adapted to the limit block is provided at the bottom of the rear side of the second slider.

[0008] Further, a vertical delay surface is provided in the middle of the second slider.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts a double-layer slider structure. With the delay surface and the second inclined guide post provided on the lower second slider, the upper first slider can first move obliquely upward by 10.4 mm under the drive of the first inclined guide post, and then after the delay effect of the second inclined guide post disappears, the first slider and the second slider move rightward simultaneously by 18.9 mm under the simultaneous action of the first inclined guide post and the second inclined guide post, so as to complete the demolding actions in two directions, realize the problem that the mold does not require oil cylinder core pulling, and there is no situation of core pulling and retracting in the mechanical form, solve the production stability and make maintenance and repair more convenient; The present invention occupies a small space and has a stable structure, thus greatly reducing the risk in the production process and reducing the cost of the mold and the procurement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the prior art;

[0011] Figure 2 is a schematic structural diagram when the present invention is installed on the product;

[0012] Figure 3 is an exploded view of the present invention and the product;

[0013] Figure 4 is a top view when the present invention is installed on the product;

[0014] Figure 5 is Figure 4 a cross-sectional view taken along line A-A in

[0015] Figure 6 is Figure 4 a cross-sectional view taken along line B-B in

[0016] Figure 7 is a schematic structural diagram when the present invention and the product are demolded;

[0017] Figure 8 is a top view when the first slider of the present invention moves and the second slider is stationary;

[0018] Figure 9 is Figure 8 a cross-sectional view taken along line C-C in

[0019] Figure 10 isFigure 8 Cross-sectional view at D-D in the middle;

[0020] Figure 11 Top view when the present invention is demolded from the product;

[0021] Figure 12 is Figure 11 Cross-sectional view at E-E in the middle. Specific implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figure 2-12 , the present invention provides the following technical solutions: A double-layer slider structure for demolding two undercuts 11 in two different directions on one side of the product 1, including slider one 2, pressing strip one 3, limit screw 4, slider two 5, pressing strip two 6, limit block 7, inclined guide post one 8 and inclined guide post two 9. In this embodiment, there are two pressing strip ones 3 and two pressing strip twos 6, and there are also two limit blocks 7 and two inclined guide posts two 9. The front side of slider one 2 contacts the undercut 11 in one direction on the product 1, and the front side of slider two 5 contacts the undercut 11 in the other direction on the product 1. The two sides of slider one 2 are limited on the upper surface of the front side of slider two 5 by pressing strip one 3 and slider one 2 slides along the inclined surface on slider two 5. The inclined surface on slider two 5 is set to be inclined upward and matches the direction of one of the undercuts 11 on the product 1. The upper surface of the convex strips on the two sides of slider one 2 contacts the bottom surface of pressing strip one 3, and slider one 2 will not move up and down during sliding. The limit screw 4 is fixed on the inclined surface of slider two 5 and the limit screw 4 is located behind slider one 2 to block the sliding of slider one 2. After slider one 2 slides obliquely upward for a certain distance, it is blocked by the limit screw 4 at the rear. At this time, slider one 2 disengages from one undercut 11 on the product 1. The two sides of slider two 5 also contact pressing strip two 6 and slider two 5 slides backward. Two limit blocks 7 are arranged at the rear of slider two 5 to block the sliding of slider two 5. After slider two 5 slides backward for a certain distance, it is blocked by the limit block 7. At this time, slider two 5 disengages from the other undercut 11 on the product 1. The lower end of inclined guide post one 8 inclines backward and sequentially penetrates through slider one 2 and slider two 5. The lower end of inclined guide post two 9 inclines backward and penetrates through the rear part of slider two 5. When the mold is opened, inclined guide post one 8 and inclined guide post two 9 move upward simultaneously. At this time, inclined guide post one 8 drives slider one 2 to slide along the inclined surface on slider two 5 until slider one 2 is limited by the limit screw 4. During this process, slider two 5 remains stationary; then, inclined guide post one 8 and inclined guide post two 9 drive slider one 2 and slider two 5 to slide backward simultaneously until slider two 5 is limited by the limit block 7.

[0024] Specifically, a groove 54 adapted to the first slider 2 is provided on the upper surface of the front side of the second slider 5. The bottom surface of the groove 54 is an inclined surface, and the direction of the inclined surface is set according to the direction of the undercut 11 on the product 1. In this embodiment, the bottom surface of the groove 54 is set to be inclined upward. The first slider 2 is located in the groove 54. The upper surfaces of the convex strips on both sides of the first slider 2 are in contact with the side edges of the bottom surface of the first pressure strip 3, and the first pressure strip 3 is obliquely fixed on both sides of the groove 54. The setting of the first pressure strip 3 will not block the upward movement of the first slider 2 along the inclined bottom surface of the groove 54, but only prevent the first slider 2 from moving up and down, improving the stability of the movement of the first slider 2. A first inclined hole 22 with the same diameter as the first inclined guide post 8 is provided on the first slider 2. An inclined hole 52 is provided at the groove 54 of the second slider 5. The first inclined guide post 8 passes through the first inclined hole 22 and the inclined hole 52. The diameter of the inclined hole 52 is larger than that of the first inclined hole 22. The diameter of the inclined hole 52 is set larger than that of the first inclined hole 22 to provide a clearance section for the first inclined guide post 8 on the second slider 5. The initial position of the first inclined guide post 8 is in contact with the front side of the inclined hole 52. When the first inclined guide post 8 moves vertically upward, at the beginning, the first inclined guide post 8 only exerts a driving force on the first slider 2 to make the first slider 2 move obliquely upward along the inclined bottom surface of the groove 54, and the moving distance is a, where a is 10.4 mm. During this process, the first inclined guide post 8 moves in the clearance section on the second slider 5 and does not exert a driving force on the second slider 5. Finally, the first inclined guide post 8 is in contact with the rear side of the inclined hole 52.

[0025] Specifically, a third inclined hole 53 is provided at the rear part of the second slider 5. The number of the third inclined holes 53 is the same as the number of the second inclined guide posts 9. The second inclined guide posts 9 pass through the third inclined holes 53. The diameter of the third inclined hole 53 is larger than that of the second inclined guide posts 9. This is to provide a clearance section for the second inclined guide posts 9 on the second slider 5. The initial position of the second inclined guide posts 9 is in contact with the front side of the third inclined holes 53. When the first slider 2 slides obliquely upward by 10.4 mm, the second inclined guide posts 9 also move vertically upward. The second inclined guide posts 9 move in the clearance section on the second slider 5 and do not exert a driving force on the second slider 5. Finally, the second inclined guide posts 9 are in contact with the rear sides of the third inclined holes 53.

[0026] Specifically, a first notch 21 adapted to the limit screw 4 is provided at the bottom of the rear side of the first slider 2, and a second notch 51 adapted to the limit block 7 is provided at the bottom of the rear side of the second slider 5. After the first slider 2 moves 10.4 mm first, the limit screw 4 is limited in the first notch 21 at the bottom of the first slider 2, shortening the length of the bottom surface of the groove 54. Then, the first slider 2 and the second slider 5 move backward together, and the moving distance is b, where b is 18.9 mm. The limit block 7 is limited in the second notch 51 at the bottom of the second slider 5. The settings of the first notch 21 and the second notch 51 can reduce the occupied space.

[0027] Specifically, a vertical delay surface 55 is provided in the middle of the second slider 5. The delay surface 55 is provided to block the backward movement of the second slider 5 when the first slider 2 slides and the mold abuts against the delay surface 55 on the second slider 5.

[0028] The installation and movement process of the present invention is as follows: First, the convex strips on both sides of the first slider 2 are fixed in the groove 54 of the second slider 5 with screws through the first pressing strip 3. Then, the first slider 2 and the second slider 5 are integrally placed in the moving mold, and the second pressing strip 6 is used to fix the screws on both sides of the second slider 5 to the moving mold. Then, the limit screw 4 and the limit block 7 are respectively fixed to the bottom surface of the groove 54 of the second slider 5 and the moving mold. Then, the first inclined guide post 8 is sequentially inserted into the first inclined hole 22 and the second inclined hole 52, and the second inclined guide post 9 is inserted into the third inclined hole 53. The first inclined guide post 8 and the second inclined guide post 9 are both fixed to the fixed mold with screws. At this time, the first inclined guide post 8 is located on the front side of the second inclined hole 52, and the second inclined guide post 9 is located on the front side of the third inclined hole 53. Movement analysis: When the mold is opened (moving vertically upward), since the first inclined guide post 8 and the second inclined guide post 9 are fixed to the front mold, they move upward together. At this time, the first slider 2 moves obliquely upward by 10.4 mm under the drive of the first inclined guide post 8 and is blocked by the limit screw 4. The first slider 2 completes the demolding in one direction. At this time, since the clearance parts are provided in the second inclined hole 52 and the third inclined hole 53 on the second slider 5, the first inclined guide post 8 and the second inclined guide post 9 cannot drive the second slider 5 to move backward. Moreover, the delay surface 55 is also provided on the second slider 5. The front mold moves upward and contacts the delay surface 55 in this process, which can block the backward movement of the second slider 5 to prevent the second slider 5 from being driven to slide. Then, the first inclined guide post 8 and the second inclined guide post 9 continue to move upward. At this time, the front mold no longer contacts the delay surface 55. Therefore, under the drive of the first inclined guide post 8 and the second inclined guide post 9, the first slider 2 is blocked by the limit screw 4 again. After the first slider 2 and the second slider 5 move backward by 18.9 mm together, the second slider 5 is blocked by the limit block 7. At this time, the demolding action in two directions is completed, and thus the two undercuts 11 in two different directions in the product 1 are withdrawn.

[0029] When there are two undercuts 11 in two different directions inside the product 1, the present invention can solve the problems of complex mold and high requirements for product installation holes, avoid wasting the production and manufacturing costs of the mold, and avoid expensive costs such as the later rectification of the mold.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-layer slider structure, characterized in that: The invention comprises a slider 1 (2), a pressure strip 1 (3), a limiting screw (4), a slider 2 (5), a pressure strip 2 (6), a limiting block (7), an inclined guide column 1 (8) and an inclined guide column 2 (9), wherein both sides of the slider 1 (2) are limited on the front side of the slider 2 (5) by the pressure strip 1 (3) and the slider 1 (2) slides along the inclined surface on the slider 2 (5), the limiting screw (4) is fixed on the inclined surface on the slider 2 (5) and the limiting screw (4) is located behind the slider 1 (2) to prevent the slider 1 (2) from sliding, both sides of the slider 2 (5) are also in contact with the pressure strip 2 (6) and the slider 2 (5) slides backward, and a limiting block (7) is arranged behind the slider 2 (5) To prevent the sliding block 2 (5) from sliding, the lower end of the inclined guide column 1 (8) tilts backwards and passes through the sliding block 1 (2) and the sliding block 2 (5) in sequence, and the lower end of the inclined guide column 2 (9) tilts backwards and passes through the rear part of the sliding block 2 (5). After the mold is opened, the inclined guide column 1 (8) and the inclined guide column 2 (9) move upward at the same time. At this time, the inclined guide column 1 (8) drives the sliding block 1 (2) to slide along the inclined surface on the sliding block 2 (5) until the sliding block 1 (2) is limited by the limit screw (4), and the sliding block 2 (5) is stationary; then, the inclined guide column 1 (8) and the inclined guide column 2 (9) respectively drive the sliding block 1 (2) and the sliding block 2 (5) to slide backwards at the same time until the sliding block 2 (5) is limited by the limit block (7).

2. A double-layer slider structure according to claim 1, characterized in that: The front side of the slider 2 (5) is provided with a groove (54) matched with the slider 1 (2), the bottom surface of the groove (54) is an inclined surface, the two sides of the slider 1 (2) are in contact with the side edges of the bottom surface of the pressure strip 1 (3), and the pressure strip 1 (3) is obliquely fixed on the two sides of the groove (54), the slider 1 (2) is provided with an inclined hole 1 (22) with the same diameter as the inclined guide column 1 (8), the groove (54) of the slider 2 (5) is provided with an inclined hole 2 (52), the inclined guide column 1 (8) passes through the inclined hole 1 (22) and the inclined hole 2 (52), and the diameter of the inclined hole 2 (52) is larger than that of the inclined hole 1 (22).

3. A double-layer slider structure according to claim 2, characterized in that: The rear part of the sliding block 2 (5) is provided with an inclined hole 3 (53), and the inclined guide column 2 (9) passes through the inclined hole 3 (53), and the diameter of the inclined hole 3 (53) is larger than that of the inclined guide column 2 (9).

4. A double-layer slider structure according to claim 3, characterized in that: The bottom rear side of the slider one (2) is provided with a notch one (21) adapted to the limit screw (4), and the bottom rear side of the slider two (5) is provided with a notch two (51) adapted to the limit block (7).

5. A double-layer slider structure according to claim 4, characterized in that: A vertical delay surface (55) is arranged in the middle of the second sliding block (5).

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