Composite angle pin demolding structure

Abstract

The utility model discloses a composite angle pin demoulding structure which comprises a lower mould core and a lower mould plate which are connected with each other, an upper mould plate and an upper mould core which are closed with the lower mould core and form a product cavity, a top plate which is elastically arranged at the bottom of the lower mould plate, and a forming component which is arranged in the cavity in a sliding manner, the forming assembly comprises a first connecting block and a second connecting block which are fixed on the top plate as well as a first pitched roof and a second pitched roof which are obliquely arranged in the lower mold core in a penetrating manner, and the first pitched roof and the second pitched roof are mutually jointed in a closed state and jointly define a forming surface which is enclosed with each other; the first pitched roof is inclined relative to the second pitched roof in the horizontal direction, and the inclination of the first pitched roof is greater than that of the second pitched roof.

Description

Technical Field

[0001] The utility model relates to the technical field of die equipment, in particular to a composite angled pin demoulding structure. Background Art

[0002] At present, in the manufacture of existing designs of dies, for the undercut features of products, angled lifters are usually set. A forming part is set at one end of the angled lifter located in the cavity, and the angled lifter is driven to move horizontally by the opening action of the upper template, so as to solve the demoulding problem of the undercut part of the product. For products with both enclosed concave seat features and undercut features at the same time, for example, a cavity on a shell-like product, there are ribs around it, and there is a long undercut feature in the cavity. If only one angled lifter is set, especially for the thin-walled rib part, the wrapping force of the rib on the angled lifter is large. Due to the shrinkage of the product during mold opening, the wall surface of the product is easily wrapped on the angled lifter, resulting in the product being unable to be smoothly demoulded. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a composite angled pin demoulding structure.

[0004] The above technical purpose of the utility model is achieved by the following technical solutions: A composite angled pin demoulding structure includes a lower die core and a lower template connected to each other, an upper template and an upper die core that are closed with the lower die core to form a product cavity, a top plate elastically arranged at the bottom of the lower template, and a forming component slidably arranged in the cavity. The forming component includes a first connecting block and a second connecting block fixed on the top plate, and a first angled lifter and a second angled lifter obliquely penetrating through the lower die core. The first angled lifter and the second angled lifter are mutually joined and together define an enclosed forming surface in the closed state. The first angled lifter is inclined in the horizontal direction with respect to the second angled lifter, and the slope of the first angled lifter is greater than that of the second angled lifter.

[0005] Further, the first angled lifter and the second angled lifter are cooperatively arranged by overlapping inclined surfaces.

[0006] Further, the first angled lifter and the second angled lifter together define an undercut surface. One side of the first angled lifter defines a first surface, and the other side of the second angled lifter defines a second surface. The undercut surface, the first surface, and the second surface are mutually enclosed and form a forming surface.

[0007] Further, in the open mold state, the distance between the first angled lifter and the undercut surface is greater than the distance between the second angled lifter and the undercut surface.

[0008] Further, the first angled lifter obliquely slides relative to the second angled lifter during the mold opening action, and the first angled lifter moves away from the undercut surface and the first surface, and a shrinkage gap is spaced between the first angled lifter and the first surface.

[0009] Furthermore, the forming assembly includes a post-forming block disposed on the lower die insert. The post-forming block defines a third molding surface at the rear sides of the first lifter and the second lifter, and together with the first lifter defines a first molding surface, and together with the second lifter defines a second molding surface.

[0010] A first inclined groove matching the first lifter and the second lifter is provided at the front side of the post-forming block.

[0011] Furthermore, the forming assembly further includes a pre-forming block disposed on the lower die insert. A second inclined groove matching the first lifter and the second lifter is provided on the pre-forming block, and the first inclined groove and the second inclined groove are oppositely arranged.

[0012] Furthermore, a first sliding groove is provided on the first connecting block, and a first pin shaft placed in the first sliding groove is provided at the upper end of the first lifter; a second sliding groove is provided on the second connecting block, and a second pin shaft placed in the second sliding groove is provided at the upper end of the second lifter, and the first sliding groove is arranged in the same direction as the first lifter.

[0013] Furthermore, the inclination angle of the first lifter is 13°, and the inclination angle of the second lifter is 11°.

[0014] Furthermore, the first lifter inclines 2° towards the second lifter.

[0015] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0016] In the present utility model, adjacent first lifter and second lifter are arranged on the cavity wall part surrounded by three sides of the product. Meanwhile, the undercut part of the product is formed on the splicing surface of the first lifter and the second lifter. By inclining the first lifter with respect to the second lifter and setting the inclination angle of the first lifter to be greater than that of the second lifter, during the mold opening process, the injection press can lift the top plate, so as to drive the first lifter and the second lifter to eject obliquely through the first connecting block and the second connecting block. Moreover, the first lifter can slide relative to the second lifter and further separate from the undercut part and the cavity wall part relative to the second lifter, thereby avoiding adhesion between the forming assembly and the cavity wall part of the product during demolding, realizing the demolding smoothness of the undercut part and the cavity wall part at the same position, as well as the forming quality of the product, and there is no mutual interference between the first lifter and the second lifter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model in a closed state;

[0018] Figure 2 is a schematic diagram of the structure of the upper template, the forming assembly and the upper die insert of the present utility model;

[0019] Figure 3Structural schematic diagram of the product, the first lifter and the second lifter of the present utility model in the closed state;

[0020] Figure 4 Structural schematic diagram of the product, the first lifter and the second lifter of the present utility model in the mold opening state;

[0021] Figure 5 Cross-sectional view of the first lifter of the present utility model;

[0022] Figure 6 Structural schematic diagram of the first lifter and the second lifter of the present utility model on the product;

[0023] Figure 7 Position schematic diagram of the first lifter and the second lifter of the present utility model in the closed state;

[0024] Figure 8 Position schematic diagram of the first lifter and the second lifter of the present utility model in the mold opening state;

[0025] Figure 9 is Figure 4 Enlarged view of part A in

[0026] Figure 10 Explosion schematic diagram of the molding assembly of the present utility model;

[0027] Figure 11 Structural schematic diagram of the top plate and the spring of the present utility model;

[0028] In the figure:

[0029] 1. Upper template; 1.1 Upper mold core;

[0030] 2. Lower template; 2.1 Lower mold core; 2.2 Guide channel;

[0031] 3. Top plate; 3.1 Spring; 3.2 Guide post; 4. First connecting block; 4.1 First chute; 5. Second connecting block; 5.1 Second chute;

[0032] 6. First lifter; 6.1 First pin shaft; 7. Second lifter; 7.1 Second pin shaft;

[0033] 8. Forming surface; 8.1 Undercut surface; 8.2 First surface; 8.3 Second surface; 8.4 Third surface;

[0034] 9. Rear forming block; 9.1 First inclined groove;

[0035] 10. Front forming block; 10.1 Second inclined groove;

[0036] 11. Product; 11.1 Cavity wall part; 11.2 Undercut part;

[0037] 12. Shrink gap; DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0040] like Figures 1-11 As shown, a composite oblique pin demolding structure includes a lower mold core 2.1 and a lower mold plate 2 connected to each other, an upper mold plate 1 and an upper mold core 1.1 which are closed with the lower mold core 2.1 and constitute a product 11 cavity, a top plate 3 elastically arranged at the bottom of the lower mold plate 2, and a molding component slidably arranged in the cavity, the molding component includes a first connecting block 4 and a second connecting block 5 fixed on the top plate 3, and a first inclined top 6 and a second inclined top 7 obliquely penetrated in the lower mold core 2.1, the first inclined top 6 and the second inclined top 7 are engaged with each other in a closed state and together define an enclosed molding surface 8, the first inclined top 6 is inclined to the second inclined top 7 in the horizontal direction, and the inclination of the first inclined top 6 is greater than that of the second inclined top 7.

[0041] The product 11 is a shell structure having a cavity wall portion 11.1 opening downward, the cavity wall portion 11.1 being a convex rib structure surrounded on all sides, an undercut portion 11.2 being provided on one side of the cavity wall portion 11.1, and the forming surface 8 being at least three adjacent convex ribs constituting the cavity wall portion 11.1.

[0042] like Figure 11 As shown, specifically, the ejector rod of the injection molding machine lifts up the top plate 3 when the mold is opened, thereby realizing the ejection action of the first inclined ejector 6 and the second inclined ejector 7. The top plate 3 is provided with a guide column 3.2 which is penetrated through the lower mold plate 2. The guide column 3.2 is sleeved with a spring 3.1. One end of the spring 3.1 abuts against the top plate 3, and the other end abuts against the bottom of the lower mold plate 2. The spring 3.1 is used to provide a reset force after the ejector rod lifts up the top plate 3.

[0043] from Figure 3As can be seen, specifically, the first inclined top 6 and the second inclined top 7 are lap-jointed and matched through inclined surfaces, that is, opposite inclined surfaces are provided between the first inclined top 6 and the second inclined top 7, so as to ensure the close fit between the two in the closed state. At the same time, the inclined surface matching method allows the first inclined top 6 to slide horizontally relative to the second inclined top 7 during mold opening, thereby avoiding interference between the two, and forming a shrinkage gap 12 between the first inclined top 6 and the product 11, so as to facilitate the demolding of the product 11.

[0044] Combined with Figure 5 , as a further explanation of the molding surface 8, the first inclined top 6 and the second inclined top 7 together define an undercut surface 8.1. The undercut surface 8.1 is pushed up by the ejector rod of the injection molding press to lift the first connecting block 4 and the second connecting block 5 on the top plate 3 during mold opening, so that the first inclined top 6 and the second inclined top 7 slide obliquely in the lower mold base 2.1, and then realize the separation of the undercut surface 8.1 from the undercut part 11.2 of the product 11;

[0045] One side of the first inclined top 6 defines a first surface 8.2, and the other side of the second inclined top 7 defines a second surface 8.3. The first surface 8.2 and the second surface 8.3 are arranged oppositely, specifically located on both sides of the undercut surface 8.1, so that the undercut surface 8.1, the first surface 8.2 and the second surface 8.3 enclose each other and constitute the molding surface 8.

[0046] Combined with Figure 9 As shown, specifically, the first inclined top 6 slides obliquely relative to the second inclined top 7 with the mold opening action, and the first inclined top 6 is far away from the undercut surface 8.1 and the first surface 8.2, and a shrinkage gap 12 is spaced between the first inclined top 6 and the first surface 8.2. The shrinkage gap 12 allows the shrinkage of the product 11 during demolding, avoids the adhesion between the product 11 and the first inclined top 6, and the shrinkage gap 12 is larger than the shrinkage amount of the product 11 corresponding to the first surface 8.2.

[0047] As Figure 1 and Figure 10As shown, in some other embodiments, the molding component includes a post-molding block 9 disposed within the lower mold core 2.1. The post-molding block 9 defines a third molding surface 8.4 at the rear side of the first lifter 6 and the second lifter 7, and together with the first lifter 6 defines a first molding surface 8.2, and together with the second lifter 7 defines a second molding surface 8.3. The first to third molding surfaces 8.4 together constitute the cavity wall portion 11.1 that surrounds the product 11 on four sides. The third molding surface 8.4 is located at the rear, the undercut molding surface 8.1 is located at the front, and the first molding surface 8.2 and the second molding surface 8.3 are located on both sides. Moreover, the first molding surface 8.2 and the second molding surface 8.3 are separated by the post-molding block 9. The post-molding block 9 is provided with a rear lapping portion that abuts against the lower mold core 2.1. And the first lifter 6 and the second lifter 7 have a horizontal stroke during the mold opening process, such that the cavity wall portion 11.1 of the product 11 is separated in two directions, effectively preventing the corresponding part from being damaged during the mold opening process.

[0048] Among them, the first lifter 6 and the second lifter 7 have a stepped portion that is spliced with each other. The stepped portion is spaced from the molding surface 8. The post-molding block 9 is provided with a mating portion that matches the stepped portion, and the post-molding block 9 is supported on the stepped portion. In this way, the position stability of the first lifter 6 and the second lifter 7 is further improved in the closing direction.

[0049] Specifically, a first inclined groove 9.1 that matches the first lifter 6 and the second lifter 7 is provided on the front side of the post-molding block 9. The first inclined groove 9.1 is specifically fitted above the corresponding stepped portion, so as to provide a holding and supporting effect on the inclined surfaces of the first lifter 6 and the second lifter 7.

[0050] Furthermore, the molding component further includes a pre-molding block 10 disposed within the lower mold core 2.1. The pre-molding block 10 is provided with a front lapping portion that abuts against the upper mold core 1.1. The pre-molding block 10 is located at the front side of the first lifter 6 and the second lifter 7 and constitutes another molding portion of the product 11. The pre-molding block 10 is provided with a second inclined groove 10.1 that matches the first lifter 6 and the second lifter 7. The first inclined groove 9.1 and the second inclined groove 10.1 are arranged oppositely, such that the first lifter 6 and the second lifter 7 are closed under the holding action between the pre-molding block 10 and the post-molding block 9.

[0051] Preferably, the second inclined groove 10.1 is located below the first inclined groove 9.1 to further optimize the holding effect on the first lifter 6 and the second lifter 7 at different positions, effectively improving the molding quality of the product 11.

[0052] Specifically, a first sliding groove 4.1 is provided on the first connecting block 4, and a first pin shaft 6.1 placed in the first sliding groove 4.1 is provided at the upper end of the first lifter 6; a second sliding groove 5.1 is provided on the second connecting block 5, and a second pin shaft 7.1 placed in the second sliding groove 5.1 is provided at the upper end of the second lifter 7. The first sliding groove 4.1 is arranged in the same direction as the first lifter 6. By providing the first sliding groove 4.1 and the second sliding groove 5.1 with directions matching those of the first lifter 6 and the second lifter 7, the horizontal sliding of the first lifter 6 and the second lifter 7 is limited during the mold opening and closing actions, effectively avoiding the vertical displacement of the first lifter 6 and the second lifter 7.

[0053] Wherein, a guiding channel 2.2 matching the first connecting block 4 and the second connecting block 5 is further provided on the lower template 2.

[0054] As an example, the inclination angle of the first lifter 6 is 13°, the inclination angle of the second lifter 7 is 11°, and the first lifter 6 inclines towards the second lifter 7 by 2°.

[0055] Through the above settings of the first lifter 6 and the second lifter 7, in the closed state, the inclined surfaces between the first lifter 6 and the second lifter 7 are spliced, and the post-forming block 9 supports behind the first lifter 6 and the second lifter 7. The first lifter 6 and the second lifter 7 are supported between the pre-forming block 10 and the post-forming block 9.

[0056] In the mold opening state, the ejector rod of the injection press lifts the top plate 3, thereby driving the first connecting block 4 and the second connecting block 5 to lift vertically. The first lifter 6 and the second lifter 7 obliquely penetrate into the lower template 2 and the lower mold core 2.1. At this time, the first lifter 6 and the second lifter 7 simultaneously slide obliquely away from the molding surface 8, and as can be seen from Figure 7 and Figure 8 it can be seen that the distance between the first lifter 6 and the undercut surface 8.1 is greater than the distance between the second lifter 7 and the undercut surface 8.1, and as can be seen from Figure 9 it can be seen that the first lifter 6 moves along the inclined direction of its horizontal plane and forms a shrinkage gap 12 with the first surface 8.2. At this time, the post-forming block 9 and the pre-forming block 10 move upward with the upper mold core 1.1, completing the demolding of the molding assembly on the cavity wall part 11.1 and the undercut part 11.2 of the product 11.

[0057] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A composite oblique pin demoulding structure, characterized in that: The invention comprises a lower mold core (2.1) and a lower mold plate (2) which are connected to each other, an upper mold plate (1) and an upper mold core (1.1) which are closed with the lower mold core (2.1) and form a mold cavity of a product (11), a top plate (3) elastically arranged at the bottom of the lower mold plate (2), and a molding component slidably arranged in the mold cavity, wherein the molding component comprises a first connecting block (4) and a second connecting block (5) fixed on the top plate (3), and a first inclined top (6) and a second inclined top (7) obliquely penetrated in the lower mold core (2.1), wherein the first inclined top (6) and the second inclined top (7) are engaged with each other in a closed state and define together an enclosed molding surface (8), the first inclined top (6) is inclined in the horizontal direction relative to the second inclined top (7), and the inclination of the first inclined top (6) is greater than that of the second inclined top (7).

2. A composite oblique pin demoulding structure according to claim 1, characterized in that: The first inclined top (6) and the second inclined top (7) are overlapped by inclined surfaces.

3. A composite oblique pin demoulding structure according to claim 1, characterized in that: The first inclined top (6) and the second inclined top (7) together define an undercut profile (8.1); one side of the first inclined top (6) defines a first profile (8.2); the other side of the second inclined top (7) defines a second profile (8.3); the undercut profile (8.1), the first profile (8.2) and the second profile (8.3) mutually surround and form a molding surface (8).

4. A composite oblique pin demoulding structure according to claim 2, characterized in that: In the mold opening state, the distance between the first inclined top (6) and the undercut profile (8.1) is greater than the distance between the second inclined top (7) and the undercut profile (8.1).

5. The composite oblique pin demoulding structure according to claim 2, characterized in that: The first inclined top (6) slides obliquely relative to the second inclined top (7) as the mold is opened, and the first inclined top (6) is away from the undercut profile (8.1) and the first profile (8.2), and a shrinkage gap (12) is spaced between the first inclined top (6) and the first profile (8.2).

6. The composite oblique pin demoulding structure according to claim 1, characterized in that: The molding assembly comprises a post-molding block (9) arranged on the lower mold core (2.1), wherein the post-molding block (9) defines a third molding surface (8.4) on the rear side of the first inclined top (6) and the second inclined top (7), and defines a first molding surface (8.2) together with the first inclined top (6), and defines a second molding surface (8.3) together with the second inclined top (7); The front side of the post-forming block (9) is provided with a first inclined groove (9.1) matching the first inclined top (6) and the second inclined top (7).

7. A composite oblique pin demoulding structure according to claim 6, characterized in that: The molding assembly further comprises a front molding block (10) arranged on the lower mold core (2.1), the front molding block (10) being provided with a second inclined groove (10.1) matching the first inclined top (6) and the second inclined top (7), the first inclined groove (9.1) being arranged opposite to the second inclined groove (10.1).

8. The composite oblique pin demoulding structure according to claim 1, characterized in that: The first connecting block (4) is provided with a first sliding groove (4.1), and the upper end of the first inclined top (6) is provided with a first pin shaft (6.1) inserted into the first sliding groove (4.1); the second connecting block (5) is provided with a second sliding groove (5.1), and the upper end of the second inclined top (7) is provided with a second pin shaft (7.1) inserted into the second sliding groove (5.1), and the first sliding groove (4.1) and the first inclined top (6) are arranged in the same direction.

9. The composite oblique pin demoulding structure according to claim 1, characterized in that: The slope of the first inclined roof (6) is 13°, and the slope of the second inclined roof (7) is 11°.

10. The composite oblique pin demoulding structure according to claim 1, characterized in that: The first inclined top (6) is inclined at 2° toward the second inclined top (7).

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