Positioning structure of plastic-iron integrated injection mold

Abstract

The utility model discloses a positioning structure of a plastic-iron integrated injection mold, which comprises a front mold, a rear mold arranged below the front mold, a mold core arranged on a parting surface of the rear mold, and a mold cavity formed between the mold core and the parting surface of the front mold and used for molding a plastic-iron product. According to the utility model, the flanges are arranged on the front side edge and the left side edge of the mold core, when the mold core is matched with a top plate for use, the four edges of a plastic iron product are all limited above the mold core and cannot move left and right and front and back, so that the plastic iron product is positioned; when the rubber-iron product is taken out, the three sliding blocks and the top plate are all away from the center of the mold core, the wrapping force on the periphery of the rubber-iron product is greatly reduced, even no wrapping force exists, the rubber-iron product can be directly taken out through a suction cup or a mechanical arm, the phenomena that the edge is damaged and the corner is jacked to protrude when the rubber-iron product is taken out are avoided, and the forming quality of the rubber-iron product is guaranteed.

Description

Technical Field

[0001] This utility model specifically relates to a positioning structure for an integrated plastic and iron injection mold. Background Technology

[0002] Plastic-coated iron is a composite material of glue and iron. In the process of plastic-coated iron injection molding, the molten glue used for injection needs to enter the mold cavity through the preset gate runner. After the plastic-coated iron product cools and solidifies, ejector pins or suction cups are used to remove the injection molded plastic-coated iron product from the mold core to complete the production.

[0003] In the current production of plastic-coated iron products, positioning pins are usually used to fix the four corners of the product. This can cause damage to the edges of the product during molding and ejection due to the large clamping force, and even cause the corners to bulge, affecting the molding quality. There is an urgent need to improve this method.

[0004] Therefore, it is necessary to invent a positioning structure for an integrated plastic-iron injection mold to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a positioning structure for an integrated plastic-iron injection mold. By setting baffles on the front and left sides of the mold core, when used in conjunction with the top plate, all four sides of the plastic-iron product are restricted above the mold core, preventing it from moving left, right, forward, or backward, thus achieving positioning of the plastic-iron product. Furthermore, when the plastic-iron product is being molded, as the parting surface opens, the three sliders and the top plate will move away from the center of the mold core. At this time, the clamping force around the plastic-iron product is greatly reduced, or even non-existent, allowing it to be directly removed by a suction cup or robotic arm. This avoids damage to the edges and bulging of corners during removal, ensuring the molding quality of the plastic-iron product.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a positioning structure for an integrated plastic and iron injection mold, comprising a front mold and a rear mold disposed below the front mold;

[0009] The mold core is disposed on the parting surface of the rear mold and forms a mold cavity for molding plastic iron products between it and the parting surface of the front mold. The front side and left side of the mold core have upward protruding retaining edges.

[0010] The top plate is installed on the rear mold and is aligned with the center line of the included angle between the two side flanges;

[0011] The ejector pin assembly is used to drive the top plate to move along the center line of the included angle toward the included angle, so as to position the plastic iron product between the flange and the top plate;

[0012] There are three sliders, which are respectively installed on the rear side and the left and right sides of the mold core to support the plastic iron product;

[0013] Several base pillars are provided, all installed at the bottom of the front mold, to drive three sliders to slide towards the outside of the mold core, so as to control the clamping force of the plastic iron product.

[0014] Preferably, a B plate is also installed on the outer side of the mold core, a base plate is provided at the bottom of the B plate, and the ejector pin assembly is disposed between the B plate and the base plate.

[0015] Preferably, the ejector pin assembly includes a lower needle plate mounted on the top of the base plate, an upper needle plate mounted on the top of the lower needle plate, a base connected to the upper needle plate, a ejector rod connected to the top of the base, and an I-shaped block mounted on the top of the ejector rod.

[0016] Preferably, the top end of the top plate away from the mold core has a downward-reaching groove, the groove is T-shaped, and the top end is inclined towards the center of the mold core;

[0017] The top plate has a milled surface milled downwards at the end near the mold core, and the milled surface is triangular in shape.

[0018] The side of the I-shaped block closest to the mold core is adapted to the slide groove, and the top plate is sleeved on the outside of the I-shaped block through the slide groove.

[0019] Preferably, the top plate is provided with a clearance hole on one side of the chute, and a limit block is provided inside the clearance hole. The bottom of the limit block is connected to plate B.

[0020] Preferably, each slider is connected to a heightening block at its top, and the heightening block has an oblique hole at its top that penetrates the slider downwards, with the top of the oblique hole tilted towards the center of the mold core.

[0021] Preferably, the tops of the plurality of base pillars are all inclined toward the center of the front mold, and each base pillar is respectively disposed inside each inclined hole.

[0022] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0023] 1. This utility model provides baffles on the front and left sides of the mold core. When used in conjunction with the top plate, all four sides of the plastic iron product are restricted above the mold core and cannot move left, right, forward, or backward, thus achieving the positioning of the plastic iron product.

[0024] 2. When the tinplate product is being molded, as the parting surface opens, the three sliders, in conjunction with the base pillar and the inclined hole, will simultaneously move away from the center of the mold core, reducing the clamping force around the tinplate product. Subsequently, the ejector pin moves upward, and with the cooperation of the I-shaped block and the slide, the ejector plate will gradually move outward away from the center of the mold core, removing the pushing force on the tinplate product. At this time, the clamping force around the tinplate product is reduced again, or even eliminated, and it can be directly removed by a suction cup or a robotic arm. This avoids damage to the edges and bulging of the corners when the tinplate product is removed, ensuring the molding quality of the tinplate product. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 Exploded view of the plastic-iron product and mold core of this utility model;

[0028] Figure 3 This is a diagram showing the distribution of the sliders in this utility model.

[0029] Figure 4 This is a structural distribution diagram of the top plate and mold core of this utility model;

[0030] Figure 5 This utility model Figure 4 Enlarged view of the A-section structure;

[0031] Figure 6 This is an exploded view of the I-shaped block and the top plate of this utility model;

[0032] Figure 7 This is an exploded view of the base column and slider of this utility model;

[0033] Figure 8 This is a cross-sectional view of the slider of this utility model;

[0034] Figure 9 This is a distribution diagram of the top plate and the glued iron product of this utility model;

[0035] Figure 10 This utility model Figure 9 Enlarged view of the structure of section B;

[0036] Figure 11 This is a perspective view of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Front mold, 2. Rear mold, 3. Mold core, 4. Side guard, 5. Top plate, 6. Ejector pin assembly, 61. Lower pin plate, 62. Upper pin plate, 63. Base, 64. Ejector rod, 65. I-shaped block;

[0039] 7. Slider, 8. Base column, 9. B plate, 10. Base plate, 11. Slide groove, 12. Milled surface, 13. Limiting block, 14. Heightening block, 15. Inclined hole, 16. Glue iron product, 17. Embedded part. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0041] This utility model provides, for example Figure 1-11 The positioning structure of a plastic-iron integrated injection mold shown includes a front mold 1 and a rear mold 2 disposed below the front mold 1.

[0042] The mold core 3 is disposed on the parting surface of the rear mold 2, and forms a mold cavity for molding plastic iron products between it and the parting surface of the front mold 1. The front side and the left side of the mold core 3 have a retaining edge 4 protruding upward.

[0043] The top plate 5 is installed on the rear mold 2 and is aligned with the center line of the included angle between the two side plates 4;

[0044] The ejector pin assembly 6 is used to drive the top plate 5 to move along the center line of the included angle toward the included angle, so that the glued iron product is positioned between the flange 4 and the top plate 5;

[0045] Three sliders 7 are provided, which are respectively installed on the rear side and the left and right sides of the mold core 3 to support the plastic iron product;

[0046] Several base pillars 8 are provided, all installed at the bottom of the front mold 1, and are used to drive three sliders 7 to slide outward toward the mold core 3 to control the clamping force of the plastic product.

[0047] In one embodiment, a B plate 9 is also installed on the outer side of the mold core 3, and a base plate 10 is provided at the bottom of the B plate 9. The ejector assembly 6 is disposed between the B plate 9 and the base plate 10. The ejector assembly 6 includes a lower needle plate 61 installed on the top of the base plate 10, an upper needle plate 62 installed on the top of the lower needle plate 61, a base 63 connected to the upper needle plate 62, an ejector rod 64 connected to the top of the base 63, and an I-shaped block 65 installed on the top of the ejector rod 64. The top of the top plate 5, away from the mold core 3, extends downwards. The slide 11 is T-shaped and tilted towards the center of the mold core 3. The side of the I-shaped block 65 near the mold core 3 is adapted to the slide 11. The top plate 5 is sleeved on the outside of the I-shaped block 65 through the slide 11. The I-shaped block 65 can move upward when the upper needle plate 62 moves upward, thereby applying a pulling force away from the center of the mold core 3 to the top plate 5 by means of the slide 11, so that the top plate 5 removes the pushing force on the plastic iron product, releases the positioning of the molded plastic iron product, and can be taken out by a suction cup or robot arm.

[0048] The top plate 5 has a milled surface 12 milled downwards on the side end near the mold core 3. The milled surface 12 is triangular in shape, so that the top plate 5 can stably press against the corner of the plastic iron product and position the two sides of the plastic iron product that do not contact the side guard 4.

[0049] In one embodiment, the top plate 5 is provided with a clearance hole on the top side of the slide groove 11. A limit block 13 is provided inside the clearance hole. The bottom of the limit block 13 is connected to the B plate 9. The limit block 13 can limit the displacement of the top plate 5 and ensure the stability of the top plate 5 when it moves horizontally.

[0050] In one embodiment, each slider 7 is connected to a heightening block 14 at its top. The heightening block 14 has an oblique hole 15 that penetrates the slider 7 downwards at its top. The top of the oblique hole 15 is inclined toward the center of the mold core 3. The tops of several base pillars 8 are inclined toward the center of the front mold 1, and each base pillar 8 is respectively disposed inside each oblique hole 15. The heightening block 14 can increase the contact distance between the base pillar 8 and the slider 7, thereby increasing the horizontal displacement of the slider 7 when it moves away from the mold core 3. This ensures that there is a sufficiently wide gap between the slider 7 and the plastic product when the slider 7 is removed, thereby reducing the impact of the clamping force on the plastic product.

[0051] The specific implementation method is as follows: When using this utility model, such as Figure 2As shown in the figure, reference numeral 16 represents the plastic iron product, and reference numeral 17 represents the embedded part, which is used to guide and limit the molten plastic injected later. When using this injection mold, the U-shaped embedded part is first embedded downward on the mold core 3 with the opening facing the side without the slider 7. The steel plate used for molding is placed directly in the embedded part. Then, the molten plastic is injected into the mold cavity through the gate of the front mold 1 until the molten plastic cools and solidifies to form the plastic iron product. During this process, the left side and front side of the plastic iron product are restricted by the side guard 4, while the corner of the right side and rear side of the plastic iron product is restricted by the milled surface 12 of the top plate 5. The top plate 5 will apply a thrust along the direction of the angle bisector of the corner. This thrust will be decomposed into two forces perpendicular to the two side guards 4 respectively, thereby tightly adhering the right side and rear side of the plastic iron product to the side guard 4, realizing the positioning of the plastic iron product, so that the plastic iron product cannot move forward, backward, left or right during the molding process.

[0052] After the plastic iron product is formed, the parting surfaces of the front mold 1 and the rear mold 2 open, and the base pillar 8 moves upward as the front mold 1 moves upward. Then, it moves out of the inclined hole 15 in a vertical upward manner. Due to the inclined setting of the inclined hole 15, when the base pillar 8 moves upward, the slider 7 will be subjected to a horizontal outward pushing force, so that the three sliders 7 move outward from the center of the mold core 3 in a synchronous manner, breaking the flow channel and moving away from the plastic iron product, which greatly reduces the clamping force around the plastic iron product.

[0053] Subsequently, the ejector assembly 6 operates, and the upper ejector plate 62 moves upward, which in turn causes the base 63 to drive the ejector rod 64 to move upward, further causing the I-shaped block 65 to move vertically upward. At this time, due to the inclined setting of the slide groove 11, when the I-shaped block 65 moves upward, the top plate 5 will be subjected to a horizontal outward pushing force, so that the top plate 5 moves away from the center of the mold core 3 along the bisector of the angle between the two side edges 4. At this time, the plastic iron product is no longer restricted by the pushing force of the top plate 5, that is, there is no external force on the four sides of the plastic iron product, and the clamping force around the plastic iron product is reduced again, or even non-existent, thereby avoiding the phenomenon of edge damage and corner bulging when the plastic iron product is taken out, ensuring the molding quality of the plastic iron product. At this time, the staff can directly take out the plastic iron product using an external suction cup or a robotic arm, thus completing the production of the plastic iron product.

[0054] This embodiment specifically addresses the problem that in the current technology, when producing plastic-coated iron products, the four corners of the product are usually fixed with plastic-coated iron positioning pins. This causes damage to the edges of the product during molding and ejection due to the large clamping force, and even causes the corners to bulge, affecting the molding quality. This is a problem that urgently needs to be improved.

[0055] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A positioning structure for an integrated plastic-iron injection mold, characterized in that: The utility model relates to a kind of ironing machine for rubber and iron, including: Front mould (1), and rear mould (2) arranged below the front mould (1); Moulding core (3) is arranged on the parting surface of the rear mould (2), and the moulding cavity for the forming of rubber and iron product is formed between the parting surface of the front mould (1), the front side and left side of the moulding core (3) are upwardly protruding with baffle (4); Top plate (5) is installed on the rear mould (2), and the center line of included angle between two baffle (4) is aligned; Top pin assembly (6) is used to drive top plate (5) to move along the center line of included angle towards included angle, so that rubber and iron product is positioned between baffle (4) and top plate (5); Slide block (7) is arranged with three, respectively installed on the rear side of the moulding core (3) and left and right sides, for supporting rubber and iron product; Base column (8) is arranged with several, and is installed on the bottom of the front mould (1), for driving three slide blocks (7) to slide towards the outside of moulding core (3), to control the tightness of rubber and iron product.

2. The positioning structure of a glue-iron integrated injection mold according to claim 1, characterized in that: The outside of the moulding core (3) is also provided with B plate (9), and the bottom of the B plate (9) is provided with bottom plate (10), and the top pin assembly (6) is arranged between B plate (9) and bottom plate (10).

3. The positioning structure of the glue-iron integrated injection mold according to claim 2, characterized in that: The top pin assembly (6) includes lower needle plate (61) installed on the top of the bottom plate (10), upper needle plate (62) installed on the top of the lower needle plate (61), base (63) connected with the upper needle plate (62), top rod (64) connected with the top of the base (63), and work-shaped block (65) installed on the top of the top rod (64).

4. The positioning structure of the glue-iron integrated injection mold according to claim 3, characterized in that: The end of the top plate (5) away from the moulding core (3) is downwardly penetrated with slide groove (11), the slide groove (11) is arranged as T shape, and the top end is inclinedly arranged towards the center direction of moulding core (3); The end of the top plate (5) close to the moulding core (3) is downwardly milled with milling surface (12), and the milling surface (12) is triangular as a whole; The side of the work-shaped block (65) close to the moulding core (3) is matched with the slide groove (11), and the top plate (5) is sleeved on the outside of the work-shaped block (65) through the slide groove (11).

5. The positioning structure of the glue-iron integrated injection mold according to claim 3, characterized in that: The top of the side of the top plate (5) in the slide groove (11) is also provided with a clearance hole, and the clearance hole is provided with a limiting block (13) inside, and the bottom of the limiting block (13) is connected with B plate (9).

6. The positioning structure of a glue-iron integrated injection mold according to claim 1, characterized in that: The top of each slide block (7) is connected with heightening block (14), the top of the heightening block (14) is provided with inclined hole (15) downwardly penetrating slide block (7), and the top end of the inclined hole (15) is inclinedly arranged towards the center direction of moulding core (3).

7. The positioning structure of the glue-iron integrated injection mold according to claim 6, characterized in that: The top end of several base columns (8) is inclinedly arranged towards the center direction of the front mould (1), and each base column (8) is arranged inside each inclined hole (15).

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