Mould structure for back-off demoulding

Abstract

The utility model relates to a mold structure for back-off mold stripping. The mold structure comprises a back-off mold stripping mechanism, an upper mold base and a lower mold base, the upper die base comprises an upper fixing plate. The back-off mold stripping mechanism comprises a first inclined guide column, a sliding block seat, a second inclined guide column, a delay block, a sliding block inclined ejector motion track, a sliding block inclined ejector and a sliding block; the first inclined guide column and the second inclined guide column are both connected with the upper fixing plate; the first inclined guide column and the second inclined guide column both penetrate through the sliding block seat; the first inclined guide column penetrates through the sliding block inclined ejection movement track; the sliding block pitched roof is connected with the sliding block pitched roof movement track in a sliding manner; the sliding block is connected with the sliding block pitched roof; the delay block is connected with the sliding block seat; the delay block abuts against the second inclined guide column. Compared with the prior art, the reverse-buckling mold stripping mechanism is arranged, the first inclined guide block and the second inclined guide block are adopted, and movement of the sliding block is decomposed, so that the product function can be guaranteed, the mold structure can be simplified, the mold manufacturing difficulty can be reduced, and a breakthrough from 0 to 1 is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould opening technology field especially a mould structure for back off ejection. BACKGROUND

[0002] Most products only exist fixed mould back off and movable mould back off, do not adopt the slider back off, but the demand of market is higher and higher, the difficulty of product production also rises, product structure is more complex, and the corresponding mould difficulty also can improve simultaneously. In the CN117001944A, a part injection molding method is disclosed, the part includes a body, a plurality of first recesses and a plurality of second recesses formed on the body, the first recesses and the second recesses are arranged at 90 degrees, a pin for forming the first recesses is installed on the slider which can move horizontally and between the slider and the male die core, a first guide hole extending in the horizontal direction is formed on the slider, a second guide hole extending in the vertical direction and communicating with the first guide hole is formed on the upper surface of the pin, a movable block consistent with the moving direction of the slider is movably installed in the first guide hole, the lower part of the movable pin which can move vertically is embedded in the second guide hole, the upper part of the movable pin is exposed from the pin and used for forming the second recesses, the movable pin and the movable block are slidably connected through two inclined surfaces with consistent inclination, the inclined surfaces extend upward in the direction close to the inclined guide column and the lengths of the two inclined surfaces are different, a through hole is formed on the upper surface of the movable block for the inclined guide column to pass through, the inner diameter of the through hole consistent with the inclination of the inclined guide column is smaller than the inner diameter of the through hole on the slider, the conversion of the back off ejection direction of different angles is realized in the limited space, so that the back off ejection of two different directions is realized through a group of mechanisms.

[0003] How to avoid product damage and simplify the mould structure in the case of slider back off is a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a mould structure for back off ejection, which overcomes the defects of the prior art, sets up a back off ejection mechanism, uses a first inclined guide block and a second inclined guide block to decompose the movement of the slider, ensures product function, simplifies the mould structure and reduces the difficulty of mould manufacturing.

[0005] The utility model discloses a mould structure for back off ejection, which overcomes the defects of the prior art, sets up a back off ejection mechanism, uses a first inclined guide block and a second inclined guide block to decompose the movement of the slider, ensures product function, simplifies the mould structure and reduces the difficulty of mould manufacturing.

[0006] The utility model discloses a mould structure for under -inverted ejection, the mould structure includes under -inverted ejection mechanism, upper die holder, lower die holder, the upper die holder includes upper fixed plate, the under -inverted ejection mechanism includes first inclined guide pillar, slider holder, second inclined guide pillar, delay block, slider inclined top movement track, slider inclined top, slider, first inclined guide pillar, second inclined guide pillar all are connected with upper fixed plate, first inclined guide pillar, second inclined guide pillar all are through slider holder, first inclined guide pillar is through slider inclined top movement track, slider inclined top and slider inclined top movement track sliding connection, slider is connected with slider inclined top, delay block is connected with slider holder, delay block and second inclined guide pillar abut.

[0007] Further, the lower die holder includes a B plate; the B plate is arranged below the upper fixed plate.

[0008] Further, a horizontal slide is arranged on the B plate; the slider holder is slidingly connected with the B plate.

[0009] Further, the upper die holder further includes an A plate; the lower die holder further includes a support plate, a ejector pin plate, an ejector pin reset plate and a lower fixed plate; the upper fixed plate, the A plate, the B plate, the support plate, the ejector pin plate, the ejector pin reset plate and the lower fixed plate are sequentially arranged from top to bottom.

[0010] Further, the first inclined guide pillar includes a first vertical portion and a first inclined guide portion, and the first vertical portion and the first inclined guide portion are connected; the second inclined guide pillar includes a second vertical portion and a second inclined guide portion, and the second vertical portion and the second inclined guide portion are connected.

[0011] Further, the length of the first vertical portion is less than the length of the second vertical portion; and the length of the first inclined guide portion is greater than the length of the second inclined guide portion.

[0012] Further, the inclination directions of the first inclined guide portion and the second inclined guide portion are both directions away from the product.

[0013] Further, a first movement groove is arranged on the slider holder; the slider inclined top movement track includes an inclined guide pillar connecting portion and a slider inclined top connecting portion; the inclined guide pillar connecting portion is connected with the slider inclined top connecting portion; the inclined guide pillar connecting portion is inserted into the first movement groove; the first inclined guide pillar penetrates through the inclined guide pillar connecting portion of the slider inclined top movement track; and the slider inclined top is slidingly connected with the slider inclined top connecting portion.

[0014] Further, the end portion of the slider abuts against the product.

[0015] Further, the first inclined guide pillar and the second inclined guide pillar are fixed with the upper fixed plate by bolts; two second inclined guide pillars are arranged, and the two second inclined guide pillars are respectively arranged on the two sides of the first inclined guide pillar.

[0016] Further, the slider is provided with a connecting hole; the slider inclined top is provided with a protrusion; the protrusion is connected with the connecting hole.

[0017] Further, the product is a plastic product.

[0018] The working (opening) method of the mold structure for the undercut demolding comprises the following steps:

[0019] In the opening process, the upper mold base and the lower mold base are relatively separated, the upper fixed plate of the upper mold base drives the first inclined guide pillar to move upward, when the first inclined guide part of the first inclined guide pillar passes through the inclined guide pillar connecting part of the slider inclined top movement track, since the first inclined guide part is inclined to the direction away from the product relative to the first vertical part, the slider inclined top movement track is driven to retreat (away from the product), the slider inclined top moves downward along the slider inclined top connecting part of the slider inclined top movement track, the undercut demolding is realized, in the opening process in this stage, the second vertical part of the second inclined guide pillar is always in contact with the delay block, and since the second vertical part is longer than the first vertical part, the slider seat does not move in the horizontal direction in the horizontal direction limiting of the second inclined guide pillar, so the slider cannot move backward, thereby ensuring that the product is not damaged;

[0020] Next, when the second inclined guide part of the second inclined guide pillar is in contact with the delay block, since the second inclined guide part is inclined to the direction away from the product relative to the second vertical part, the slider seat and the delay block are driven to retreat, further driving the slider inclined top movement track and the slider inclined top to retreat, the opening is realized.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] 1) The mold structure for the undercut demolding provided by the technical scheme can guarantee the product function, simplify the mold structure, and reduce the mold manufacturing difficulty by setting the undercut demolding mechanism, adopting the first inclined guide block and the second inclined guide block, and decomposing the slider movement.

[0023] 2) The mold structure for the undercut demolding provided by the technical scheme is simple in structure, and in the two-stage opening process, the slider does not retreat in the first stage to guarantee that the product is not damaged, and the slider retreats in the second stage to completely realize the opening. DRAWINGS

[0024] Figure 1 It is a sectional structure schematic view (cut along the first inclined guide pillar) of the mold structure for the undercut demolding in the embodiment of the utility model.

[0025] Figure 2 It is Figure 1 a local enlarged view.

[0026] Figure 3 The sectional structure schematic view (cut along the second inclined guide column) of the mold structure for the inverted buckle demolding in the embodiment of the present application.

[0027] Figure 4 The three-dimensional structure schematic view of the inverted buckle demolding mechanism in the embodiment of the present application Figure 1 (not showing the sliding block).

[0028] Figure 5 The three-dimensional structure schematic view of the inverted buckle demolding mechanism in the embodiment of the present application Figure 2 (not showing the sliding block).

[0029] Figure 6 The three-dimensional schematic view of the sliding block inclined top movement track and the sliding block inclined top of the mold structure for the inverted buckle demolding in the embodiment of the present application.

[0030] Figure 7 The three-dimensional schematic view of the sliding block and the sliding block inclined top of the mold structure for the inverted buckle demolding in the embodiment of the present application.

[0031] Figure 8 The separation schematic view of the sliding block inclined top movement track and the sliding block inclined top of the mold structure for the inverted buckle demolding in the embodiment of the present application.

[0032] Among them:

[0033] 1, upper fixed plate, 2, A plate, 3, B plate, 4, support plate, 6, thimble plate, 7, thimble reset plate, 8, lower fixed plate, 9, first inclined guide column, 10, sliding block seat, 11, second inclined guide column, 12, delay block, 13, product, 14, sliding block inclined top movement track, 15, sliding block inclined top, 16, sliding block. DETAILED DESCRIPTION

[0034] The present application will be described in detail below in combination with the drawings and specific embodiments. In the technical solution, if the component model, material name, connection structure and other features are not explicitly described, they are considered as common technical features disclosed in the prior art.

[0035] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements;"up", "down", "left", "right" and so on are only used to show the relative position relation, when the absolute position of the object described changes, the relative position relation can change. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] It should be noted that, in the utility model, relational terms such as first and second and the like are used merely to distinguish one entity or action from another entity or action without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprises a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0037] The content of the utility model will be further described in detail below in combination with specific embodiments.

[0038] Embodiment

[0039] As Figures 1 to 8 shown, a mold structure for inverted buckle demolding is provided in the embodiment, which comprises an inverted buckle demolding mechanism, an upper mold base and a lower mold base.

[0040] Figure 2 The partial structure of product 13 in A part is product inverted buckle, which is T-shaped inverted buckle in the embodiment, and the inverted buckle is between slide block inclined top 15 and slide block 16.

[0041] The upper mold base comprises upper fixed plate 1 and A plate 2.

[0042] The lower mold base comprises B plate 3, support plate 4, ejector plate 6, ejector reset plate 7 and lower fixed plate 8.

[0043] The upper fixed plate 1, A plate 2, B plate 3, support plate 4, ejector plate 6, ejector reset plate 7 and lower fixed plate 8 are sequentially arranged from top to bottom.

[0044] The reverse-drawing mechanism comprises a first inclined guide pillar 9, a slider seat 10, a second inclined guide pillar 11, a delay block 12, a slider inclined top movement track 14, a slider inclined top 15, and a slider 16; the first inclined guide pillar 9 and the second inclined guide pillar 11 are connected with the upper fixed plate 1; the first inclined guide pillar 9 and the second inclined guide pillar 11 penetrate through the slider seat 10; the first inclined guide pillar 9 penetrates through the slider inclined top movement track 14; the slider inclined top 15 is in sliding connection with the slider inclined top movement track 14; the slider 16 is connected with the slider inclined top 15; the delay block 12 is connected with the slider seat 10; and the delay block 12 is in abutment with the second inclined guide pillar 11.

[0045] The B plate 3 is provided with a horizontal slide; and the slider seat 10 is in horizontal sliding connection with the B plate 3.

[0046] The first inclined guide pillar 9 comprises a first vertical part and a first inclined guide part, and the first vertical part and the first inclined guide part are connected; and the second inclined guide pillar 11 comprises a second vertical part and a second inclined guide part, and the second vertical part and the second inclined guide part are connected.

[0047] The length of the first vertical part is less than the length of the second vertical part; and the length of the first inclined guide part is greater than the length of the second inclined guide part.

[0048] The inclined directions of the first inclined guide part and the second inclined guide part are both directions away from the product 13.

[0049] The slider seat 10 is provided with a first movement groove; the slider inclined top movement track 14 comprises an inclined guide pillar connecting part 14-1 and a slider inclined top connecting part 14-2; the inclined guide pillar connecting part 14-1 is connected with the slider inclined top connecting part 14-2; the inclined guide pillar connecting part 14-1 is inserted into the first movement groove; the first inclined guide pillar 9 penetrates through the inclined guide pillar connecting part 14-1 of the slider inclined top movement track 14; and the slider inclined top 15 is in sliding connection with the slider inclined top connecting part 14-2.

[0050] The end of the slider 16 is in abutment with the product 13.

[0051] The first inclined guide pillar 9 and the second inclined guide pillar 11 are fixed with the upper fixed plate 1 by bolts; two second inclined guide pillars 11 are arranged, and the two second inclined guide pillars 11 are respectively arranged on the two sides of the first inclined guide pillar 9.

[0052] The slider 16 is provided with a connecting hole; the slider inclined top 15 is provided with a protrusion; and the protrusion is connected with the connecting hole.

[0053] The product 13 is a plastic product.

[0054] The rear end of the slider 16 is in abutment with the slider seat 10.

[0055] The working (opening) method of the mold structure for the undercut demolding comprises the following steps:

[0056] The first stage: in the opening process, the upper mold base and the lower mold base are relatively separated, the upper fixed plate 1 of the upper mold base drives the first inclined guide column 9 to move upward, when the first inclined guide part of the first inclined guide column 9 passes through the inclined guide column connecting part 14-1 of the slider inclined top movement track 14, since the first inclined guide part is inclined to the direction away from the product relative to the first vertical part, the slider inclined top movement track 14 is driven to retreat (away from the product 13), the slider inclined top 15 moves downward along the slider inclined top connecting part 14-2 of the slider inclined top movement track 14, the undercut demolding is realized, in the opening process of this stage, the second vertical part of the second inclined guide column 11 is always in contact with the delay block 12, and since the second vertical part is longer than the first vertical part, the slider 16 cannot move backward in the horizontal direction in the horizontal direction limiting of the second inclined guide column 11, so that the product is not damaged;

[0057] The second stage: next, when the second inclined guide part of the second inclined guide column 11 is in contact with the delay block 12, since the second inclined guide part is inclined to the direction away from the product relative to the second vertical part, the slider seat 10 and the delay block 12 are driven to retreat, further driving the slider inclined top movement track 14 and the slider inclined top 15 to retreat, and the mold is opened.

[0058] Embodiment 2

[0059] In this embodiment, a mold structure for undercut demolding is provided, and the embodiment further comprises the following settings based on the embodiment 1:

[0060] The mold structure for undercut demolding further comprises a limiting block 17; the limiting block 17 is connected with the A plate 2, and when the mold is not opened, the limiting block 17 is in abutment with the tail of the slider seat 10, so as to realize further limiting of the slider seat 10 in the horizontal direction in the opening process of the first stage.

[0061] The utility model focuses on the structure improvement of the undercut demolding part, and the specific setting of the injection molding structure does not affect the realization of the undercut demolding.

[0062] The above description of the embodiments is for the convenience of the ordinary skilled person in the technical field to understand and use the utility model. Those skilled in the art can obviously easily make various modifications to these embodiments, and apply the general principles described herein to other embodiments without having to have creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A mold structure for undercut demolding, characterized by, The mold structure comprises a reverse buckle mold mechanism, an upper mold base, and a lower mold base; The upper mold base comprises an upper fixed plate (1); The reverse buckle mold mechanism comprises a first inclined guide column (9), a slider seat (10), a second inclined guide column (11), a delay block (12), a slider inclined top movement track (14), a slider inclined top (15), and a slider (16); The first inclined guide column (9) and the second inclined guide column (11) are connected with the upper fixed plate (1); The first inclined guide column (9) and the second inclined guide column (11) penetrate the slider seat (10); The first inclined guide column (9) penetrates the slider inclined top movement track (14); The slider inclined top (15) is slidingly connected with the slider inclined top movement track (14); The slider (16) is connected with the slider inclined top (15); The delay block (12) is connected with the slider seat (10); The delay block (12) is in abutment with the second inclined guide column (11).

2. A mold structure for undercut mold release according to claim 1, wherein The lower mold base comprises a B plate (3); The B plate is arranged below the upper fixed plate (1).

3. A mold structure for undercut mold release according to claim 2, wherein The B plate (3) is provided with a horizontal slide; The slider seat (10) is slidingly connected with the B plate (3).

4. A mold structure for undercut mold release according to claim 2, wherein The upper mold base further comprises an A plate (2); The lower mold base further comprises a support plate (4), a ejector pin plate (6), an ejector pin reset plate (7), and a lower fixed plate (8); The upper fixed plate (1), the A plate (2), the B plate (3), the support plate (4), the ejector pin plate (6), the ejector pin reset plate (7), and the lower fixed plate (8) are sequentially arranged from top to bottom.

5. A mold structure for undercut mold release according to claim 1 wherein, The first inclined guide column (9) comprises a first vertical portion and a first inclined guide portion, and the first vertical portion and the first inclined guide portion are connected; The second inclined guide column (11) comprises a second vertical portion and a second inclined guide portion, and the second vertical portion and the second inclined guide portion are connected; The length of the first vertical portion is less than the length of the second vertical portion; The length of the first inclined guide portion is greater than the length of the second inclined guide portion.

6. A mold structure for undercut mold release according to claim 5 wherein, The inclined directions of the first inclined guide portion and the second inclined guide portion are both directions away from the product (13).

7. A mold structure for undercut mold release according to claim 1 wherein, The slider seat (10) is provided with a first movement groove; The slider inclined top movement track (14) comprises an inclined guide column connecting portion (14-1) and a slider inclined top connecting portion (14-2); The inclined guide column connecting portion (14-1) is connected with the slider inclined top connecting portion (14-2); The inclined guide column connecting portion (14-1) is inserted into the first movement groove; The first inclined guide column (9) penetrates the inclined guide column connecting portion (14-1) of the slider inclined top movement track (14); The slider inclined top (15) is slidingly connected with the slider inclined top connecting portion (14-2).

8. A mold structure for undercut mold release according to claim 1 wherein, The end portion of the slider (16) is in abutment with the product (13).

9. The mold structure for undercut mold release of claim 1, wherein, The first inclined guide column (9) and the second inclined guide column (11) are fixed with the upper fixed plate (1) by bolts; Two second inclined guide columns (11) are arranged on both sides of the first inclined guide column (9).

10. The mold structure for undercut mold release of claim 1, wherein, The slider (16) is provided with a connecting hole; The slider inclined top (15) is provided with a protrusion; The protrusion is connected with the connecting hole.

Images