Micro-space inclined roof demolding structure

Abstract

The present application is a kind of micro space inclined top demolding structure, comprising: lower die plate, lower die core; upper die plate, upper die core; side extraction mechanism is arranged on both sides of lower die plate, the end of its side extraction rod has second profiling; at least one pair of inclined top, its bottom is connected with slide set on top plate, its top is inclined through lower die plate, its top plane forms support surface for side extraction rod movement; third imitation is arranged at the top plane of inclined top, its outer side wall is inwardly provided with groove; the molded part is vertically arranged in lower die core, its top has fourth profiling constituting product hollow structure; when injection molding is completed, upper die core moves up, product is placed on the support surface on the top of inclined top, then the two relatively arranged inclined top moves obliquely upward, so that the bottom of inclined top approaches each other along slide, the top of inclined top also approaches each other, so that the groove at third profiling is separated from the protrusion, at the same time, the product is lifted upward by inclined top, which is convenient for subsequent mechanical hand to grab, and realizes product demolding.

Description

A micro-space inclined ejector structure Technical Field

[0001] This invention relates to the field of molds, and in particular to a micro-space inclined ejector demolding structure. Background Technology

[0002] Referring to Figures 1 and 2, the product to be injection molded for the application is used to assemble hearing aids. The lower part of the inner wall of the product in the figure has a protruding part, which is used to increase the firmness during assembly.

[0003] However, for this product, demolding the protruding part formed on the inner wall of the product is quite difficult;

[0004] In summary, how to achieve demolding of the inner wall protrusions after molding has become an urgent problem for researchers in this field. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to achieve demolding of the inner wall protrusion after molding.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] This invention is a micro-space inclined ejector demolding structure, comprising: a lower mold plate with at least one lower mold core on its top; an upper mold plate with an upper mold core matching the lower mold core on its bottom; a side-pulling mechanism disposed on both sides of the lower mold plate, the ends of the side-pulling rods forming a first contour of the lower part and middle part of the outer wall of the product; the bottom of the upper mold core forming a second contour of the upper part of the outer wall and the upper part of the inner wall of the product; at least one pair of inclined ejectors, the bottom of which are connected to a slide on a top plate, the top of which obliquely passes through the lower mold plate, and the top plane of which forms a support surface for the movement of the side-pulling rods; a third contour, disposed at the top plane of the inclined ejector, the outer side wall of which has an inwardly provided groove, the groove being used to injection mold a protrusion forming the inner wall of the product; and a molding part, which is vertically disposed in the lower mold core and located between the two inclined ejectors, the top of which has a fourth contour forming the middle structure of the product.

[0008] Furthermore, the side-pull mechanism also includes: a first wedge for connecting the end of the side-pull rod, wherein the first wedge and the lower template achieve linear movement through the cooperation of a sliding groove and a sliding rail; a second wedge disposed in the upper template and forming an inclined surface cooperation with the first wedge; when the upper template and the lower template are closed, the two second wedges move downward, driving the two first wedges to move laterally relative to each other.

[0009] Furthermore, the first contouring includes: a first arc-shaped surface and a second arc-shaped surface that are opened inward at the end of the side pull rod and are arranged vertically, the first arc-shaped surface protruding from the second arc-shaped surface, and a stepped surface formed between the first arc-shaped surface and the second arc-shaped surface.

[0010] Furthermore, one of the side pull rods has inwardly opening positioning grooves on both sides of its end face, and the other side pull rod, which is arranged opposite to the side pull rod, has protrusions on both sides of its end face that match the positioning grooves to form an interlocking positioning.

[0011] Furthermore, the second profilograph includes:

[0012] The upper mold core has a cavity in its bottom wall; multiple external teeth are provided on both sides of the cavity at equal intervals, and internal teeth are provided on the inner side of the multiple external teeth.

[0013] Furthermore, the inner surface of the third contour is coplanar with the inner surface of the sloping top; the third contour includes: a third arc-shaped surface and a fourth arc-shaped surface arranged vertically, the fourth arc-shaped surface protruding from the third arc-shaped surface, and a stepped surface formed between the third arc-shaped surface and the fourth arc-shaped surface; the fourth arc-shaped surface is recessed inwardly with the groove.

[0014] Furthermore, the two sides of the molded part are inclined surfaces, and the inclined surfaces and the corresponding inclined top side surfaces form a surface guide.

[0015] Furthermore, the fourth conforming includes: a rectangular body and a trapezoidal body arranged vertically, the trapezoidal body being connected to the forming part; the trapezoidal inclined surfaces on both sides of the trapezoidal body matching the lower part of the inner side surface of the internal tooth part; and the top of the rectangular body having a forming gap with the top of the cavity.

[0016] The beneficial effects of this invention are as follows: This invention is a micro-space inclined ejector demolding structure. After injection molding is completed, the upper mold core moves upward and the slider slides to both sides. The molded product is placed on the support surface at the top of the inclined ejector. Then the top plate is pushed up, and the two inclined ejectors set opposite each other move obliquely upward. In this way, the bottom of the inclined ejector moves closer to each other along the slide block, and the top of the inclined ejector also moves closer to each other. The groove and protrusion at the third contouring point disengage. At the same time, the product is lifted upward by the inclined ejector, which facilitates the subsequent gripping by the robot arm and realizes the demolding of the product. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 is a 3D view of the product;

[0019] Figure 2 is a 3D view of the product from another perspective;

[0020] Figure 3 is a longitudinal sectional view of the product;

[0021] Figure 4 is a cross-sectional view of the product;

[0022] Figure 5 is a schematic diagram of the mold structure;

[0023] Figure 6 is a schematic diagram of the internal structure of the mold;

[0024] Figure 7 is a cross-sectional view of the mold;

[0025] Figure 8 is a cross-sectional view of the side push mechanism, upper mold core, lower mold core, inclined ejector, molding parts, and product assembly.

[0026] Figure 9 is a schematic diagram of the structure of the top of the sloping roof;

[0027] Figure 10 is a schematic diagram of the side pull rod structure;

[0028] Figure 11 is a diagram showing the connection of the two pull rods;

[0029] Figure 12 is a schematic diagram of the bottom structure of the upper mold core;

[0030] Figure 13 is an enlarged view of point A in Figure 12;

[0031] Figure 14 is a schematic diagram of the structure of the molded part;

[0032] Figure 15 is a schematic diagram of the structure in which the product is lifted;

[0033] Figure 16 is an enlarged view of section B in Figure 15. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0035] As shown in Figures 1, 2, 3, and 4, these are the product drawings required for injection molding in this embodiment. Product 01 is a part of a hearing aid, and product 01 has the following characteristics:

[0036] 1. The lower part of the outer wall 011 protrudes from the middle part of the outer wall 012, forming a stepped surface 014 between the two;

[0037] 2. The upper part 013 of the outer wall has multiple first toothed pieces 015 arranged at equal intervals on both sides. A second toothed piece 016 is provided on the inner side of each first toothed piece 015. The second toothed piece 016 is located at the top of the inner wall 017. The gap between two adjacent second toothed pieces 016 allows the product to be set through from top to bottom.

[0038] 3. The middle part 019 of the inner wall protrudes from the lower part 018 of the inner wall, forming a stepped surface 020 between the two; protruding parts 021 are provided on opposite sides of the lower part 018 of the inner wall.

[0039] 4. Ribs 022 are provided between multiple second toothed pieces 016 located at the top of the inner wall 017 and arranged opposite each other;

[0040] 5. The bottom of each second toothed piece 016 is a flat surface, and the second toothed piece 016 has a structure that is narrow at the bottom and wide at the top.

[0041] In order to form a finished product with the above five characteristics, as shown in Figures 5, 6, and 7, this embodiment discloses a micro-space inclined top demolding structure. The mold 1 includes conventional components such as an upper fixing plate 11, a lower fixing plate 12, a support plate 13, an upper template 14, a lower template 15, and a top plate 16. The mold is a 1-cavity 4-mold structure, that is, it includes 4 pairs of upper mold cores 17 and lower mold cores 18.

[0042] Due to feature 1 of the product, this embodiment uses a side-pull mechanism 19 for molding;

[0043] Because of product feature 3, this embodiment uses a sloping top structure for molding, as shown in Figure 8. Specifically, this embodiment has four pairs of sloping tops 20, each pair consisting of two symmetrical and inclined sloping tops. The sloping tops 20 obliquely pass through the support plate 13, the lower template 15, and the lower mold core 18, with their tops located in the cavity. The bottom of the sloping tops 20 is connected to the slide block 21 on the top plate 16. A groove 23 is provided at the third contour 22. Thus, during the injection molding process, the groove 23 is used to mold the protrusion 021 of product feature 3.

[0044] As shown in Figures 15 and 16, after injection molding is completed, the upper mold core 17 moves upward, and the molded product is placed on the support surface 24 at the top of the inclined ejector 20. Then, the top plate 16 is pushed up, and the two inclined ejectors 20, which are set opposite each other, move upward at an angle. In this way, the bottom of the inclined ejector 20 moves closer to each other along the slide 21, and the top of the inclined ejector 20 also moves closer to each other. In this way, the groove 23 at the third contour 22 is separated from the protrusion 021. At the same time, the product is pushed upward by the inclined ejector 20, which makes it easier for the robot to grasp and demold the product.

[0045] In some embodiments, as shown in FIG8, to illustrate the specific structure of the side-pull mechanism 19, this embodiment uses the side-pull mechanism further comprising: a first wedge 191 for connecting the end of the side-pull rod 193, wherein the first wedge 191 and the lower template 15 achieve linear motion through the cooperation of a groove and a rail; a second wedge 192, which is disposed in the upper template 14 and forms an inclined surface cooperation with the first wedge 191; when the upper template 14 and the lower template 15 are closed, the two second wedges 192 move downward, driving the two first wedges 191 to move laterally relative to each other.

[0046] In this embodiment, the side-pull mechanism 19 is arranged in pairs on both sides of the lower mold plate 15. One end of the side-pull rod 193 is located at the cavity, and the first contour 194 formed at this end is used to form the lower part 011 and the middle part 012 of the outer wall in product feature 1. The other end of the side-pull rod 193 is connected to the first wedge 191. The second wedge 192 is connected to the first wedge 191 through a inclined guide. The top of the second wedge 192 is adapted to contact the upper mold plate 14. When the upper mold plate 14 and the lower mold plate 15 are closed, the two second wedges 192 move downward, driving the two first wedges 191 to move laterally relative to each other. In this way, during the injection molding process, it is ensured that the side-pull rod 193 will not move outward.

[0047] In addition, the end of the side pull rod 193 that constitutes the first contour 194 is always supported on the support surface 24 of the inclined top 20 during the lateral movement, which can ensure the stable and accurate stroke of the side pull rod 193.

[0048] In some embodiments, as shown in FIG10, in order to illustrate the specific structure of the first contour, the present invention adopts a first contour 194 including: a first arc-shaped surface 195 and a second arc-shaped surface 196 with the end of the side pull rod 193 opening inward and arranged vertically, the first arc-shaped surface 195 protruding from the second arc-shaped surface 196, and a stepped surface 197 formed between the first arc-shaped surface 195 and the second arc-shaped surface 196.

[0049] In this embodiment, the two first arc-shaped surfaces 196 of the two oppositely arranged side pull rods 193 together form the middle part 012 of the outer wall of product feature 1, the two second arc-shaped surfaces 196 together form the lower part 011 of the outer wall of product feature 1, and the stepped surface 197 constitutes the product stepped surface 014 of product feature 1.

[0050] In some embodiments, as shown in FIG11, in order to ensure that the oppositely arranged side pull rods can be accurately inserted and positioned, the present invention employs a positioning groove 198 formed on both sides of the end face of one of the side pull rods 193, and a protrusion 199 matching the positioning groove 198 is provided on both sides of the end face of the other side pull rod 193 opposite to the side pull rod 193.

[0051] In this embodiment, when the two opposing pull rods move relative to each other, the end faces of the two pull rods 193 come into contact. At this time, the protrusion 199 is inserted into the positioning groove 198 to ensure the quasi-positioning between the two pull rods 193 and to prevent the two pull rods 193 from shifting.

[0052] In some embodiments, as shown in Figures 12 and 13, in order to form the structure in product feature 2, the present invention employs a second contour 3 including: a cavity 31 opened in the bottom wall of the upper mold core 17; a plurality of external teeth 32 with equal spacing are provided on both sides of the cavity 31, and an internal tooth 33 is correspondingly provided on the inner side of the plurality of external teeth 32.

[0053] In this embodiment, the gaps between the multiple external teeth 32 at the bottom of the upper mold core are used to form the first toothed piece 015 in the product feature 2. Similarly, the gaps between the multiple internal teeth 33 at the bottom of the upper mold core 17 are used to form the second toothed piece 016 in the product feature 2. The internal teeth 33 are inserted vertically so that the formed product 001 is arranged vertically.

[0054] In some embodiments, as shown in FIG9, in order to form a stepped surface 020 between the inner wall middle part 019 and the lower inner wall part 018 in the product feature 2, the present invention adopts the inner side surface of the third contour 22 and the inner side surface of the inclined top 20 being coplanar; the third contour 22 includes: a third arc-shaped surface 25 and a fourth arc-shaped surface 26 arranged vertically, the fourth arc-shaped surface 26 protruding from the third arc-shaped surface 25, and the third arc-shaped surface 25 and the fourth arc-shaped surface 26 forming a stepped surface 27; the fourth arc-shaped surface 26 is recessed inwardly with the groove 23;

[0055] In this embodiment, the inner surface of the third contour 22 is coplanar with the inner surface of the inclined top, so that the third contour 22 and the inclined top 20 can make surface contact with the molding part 4. After injection molding, the product has a hollow structure at this point. The third arc surface 25 is used to mold the middle part 019 of the inner wall of the product feature 2, the fourth arc surface 26 is used to mold the lower part 018 of the inner wall of the product feature 2, and the step surface 27 is used to mold the step surface 020 of the product feature 2.

[0056] In some embodiments, as shown in FIG14, in order to achieve the upward movement of the inclined top, this embodiment uses the two sides of the forming part 4 as inclined surfaces 41, and the inclined surfaces 41 and the corresponding side of the inclined top 20 form a surface guide.

[0057] In this embodiment, the forming part 4 is located between the two inclined tops 20. The forming part 4 has a structure that is narrow at the top and wide at the bottom. Therefore, the two sides of the forming part are inclined surfaces 41. The inclined surfaces 41 are in surface contact with the inclined tops 20, thus realizing the inclined movement of the inclined tops 20.

[0058] In some embodiments, as shown in FIG14, in order to form the structure in product features 4 and 5, the present invention employs the fourth contouring 42, which includes: a rectangular body 43 and a trapezoidal body 44 arranged vertically, the trapezoidal body 44 being connected to the forming part 4; the trapezoidal inclined surfaces on both sides of the trapezoidal body 44 matching the lower part of the inner side surface of the internal tooth portion 33;

[0059] In this embodiment, there is a molding gap between the rectangular body 43 and the cavity 31 of the upper mold core 17, which is used to mold the rib 022 in the product feature 4.

[0060] The trapezoidal body 44 has a structure that is narrow at the top and wide at the bottom. The inner slope of the bottom of the inner tooth part 33 is in surface contact with the outer slope of the trapezoidal body 44. Thus, the formed second tooth piece 016 has a sheet-like structure that is narrow at the bottom and wide at the top.

[0061] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A micro-space inclined ejector demolding structure, characterized in that, include: The lower template has at least one lower mold core at its top; The upper mold plate has an upper mold core at its bottom that matches the lower mold core; a side-pull mechanism is provided on both sides of the lower mold plate, with the ends of the side pull rods forming a first contour of the lower and middle outer walls of the product; the bottom of the upper mold core forms a second contour of the upper outer and inner walls of the product; at least one pair of inclined tops are connected at their bottoms to a slide block on the top plate, and their tops obliquely pass through the lower mold plate, with their top plane forming a support surface for the movement of the side pull rods; a third contour is provided at the top plane of the inclined tops, with a groove on its outer side wall for injection molding a protrusion forming the inner wall of the product; a molding part is vertically arranged in the lower mold core and located between the two inclined tops, with its top having a fourth contour forming the middle structure of the product; the side-pull mechanism further includes: a first wedge for connecting the ends of the side pull rods, the first wedge and the lower mold plate achieving linear movement through the cooperation of a slide groove and a slide rail; a second wedge, its The second wedge is set inside the upper template and forms an inclined surface with the first wedge; when the upper and lower templates are closed, the two second wedges move downward, driving the two first wedges to move laterally relative to each other; the first contour includes: the end of the side pull rod is opened inward and has a first arc surface and a second arc surface arranged vertically, the first arc surface protrudes from the second arc surface, and a stepped surface is formed between the first arc surface and the second arc surface; the end face of one of the side pull rods has a positioning groove on both sides, and the end face of the other side pull rod opposite to the side pull rod has protrusions on both sides that match the positioning groove to form an interlocking positioning; the inner surface of the third contour is coplanar with the inner surface of the inclined top; the third contour includes: a third arc surface and a fourth arc surface arranged vertically, the fourth arc surface protrudes from the third arc surface, and a stepped surface is formed between the third arc surface and the fourth arc surface; the fourth arc surface has the groove recessed inward.

2. The micro-space inclined ejector demolding structure according to claim 1, characterized in that, The second conformation includes: a cavity formed in the bottom wall of the upper mold core; multiple external teeth are provided on both sides of the cavity at equal intervals, and internal teeth are provided on the inner side of the multiple external teeth.

3. The micro-space inclined ejector demolding structure according to claim 1, characterized in that, The two sides of the molded part are inclined surfaces, and the inclined surfaces and the corresponding inclined top side surfaces form a surface guide.

4. The micro-space inclined ejector demolding structure according to claim 1, characterized in that, The fourth conforming includes: a rectangular body and a trapezoidal body arranged vertically, the trapezoidal body being connected to the forming part; the trapezoidal inclined surfaces on both sides of the trapezoidal body matching the lower part of the inner side surface of the internal tooth part; and the top of the rectangular body having a forming gap with the top of the cavity.

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