Rear mold driving structure of plastic-iron integrated injection mold

Abstract

The utility model discloses a rear mold driving structure of a plastic-iron integrated injection mold, which comprises a rear mold, the rear mold comprises a plate B, a mold core, three sliding blocks and a shovel base, the plate B is positioned above the rear mold, the top of the middle of the plate B is provided with the mold core, the three sliding blocks are respectively arranged on the front side, the left side and the right side of the mold core and are used for supporting plastic-iron products, and the shovel base is used for supporting the plastic-iron products. And the sliding blocks are arranged on the inner sides of the sliding blocks. The ejector rod is driven by the ejector pin assembly to push the shovel base to move upwards, under the limitation of the clamping groove, the shovel base moves upwards to force the sliding block to move horizontally towards the center of the mold core and be away from the periphery of a rubber-iron product, and the wrapping force borne by the rubber-iron product is greatly reduced; when the rubber-iron product is ejected, the T-shaped plate can be pushed to move upwards to enable the inclined ejector to eject the rubber-iron product upwards, so that the rubber-iron product is effectively prevented from being damaged due to large wrapping force when being ejected, and the production quality of the rubber-iron product is ensured.

Description

Technical Field

[0001] This utility model specifically relates to a rear mold drive 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 channel. After the plastic-coated iron product cools and solidifies, the injection molded plastic-coated iron product is ejected from the mold core using ejector pins.

[0003] During the production of plastic-coated iron products, the three sides other than the front have undercuts and glued areas, resulting in a large clamping force on the products. This makes them easily stick to the mold core. Existing plastic-coated iron injection molds cannot reduce the clamping force on the products when ejecting them, often causing deformation around the edges during ejection and greatly reducing the molding quality.

[0004] Therefore, it is necessary to invent a rear mold drive 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 rear mold drive structure for an integrated plastic and iron injection mold. The ejector pin assembly drives the ejector rod to push the shovel base upwards. Under the limitation of the slot, the upward movement of the shovel base forces the slider to move towards the center of the mold core, away from the periphery of the plastic and iron product, greatly reducing the clamping force on the product. Simultaneously, as the middle ejector plate moves upwards by a buffer gap, the T-shaped plate can be pushed upwards, causing the inclined ejector to eject the plastic and iron product upwards. This effectively avoids the plastic and iron product being damaged during ejection due to excessive clamping force, ensuring production quality.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a rear mold drive structure for an integrated plastic and iron injection mold, comprising a rear mold, wherein the rear mold includes a B plate located above the rear mold, and a mold core is installed at the top center of the B plate;

[0009] There are three sliders, which are respectively installed on the front side and the left and right sides of the mold core to support the plastic iron product;

[0010] A shovel base is installed on the inner side of each of the sliders, and a push rod is installed at the bottom of each shovel base to drive the slider to slide toward the center of the mold core in order to control the clamping force of the plastic product;

[0011] An inclined ejector, installed at the four corners of the mold core, can move upwards to eject the cured and molded plastic iron product from the mold core;

[0012] The ejector pin assembly is located below the B plate and is used to drive the ejector rod and the angled ejector to move.

[0013] Preferably, the ejector plate driving structure of the integrated plastic-iron injection mold further includes a front mold located above the rear mold, and a mold cavity for plastic-iron molding is formed between the front mold and the mold core parting surface.

[0014] Preferably, the rear mold further includes a base plate located below, and the ejector pin assembly is disposed on the top of the base plate. The ejector pin assembly includes a plurality of ejector pins installed on the top of the base plate, a lower ejector plate disposed on the top of the base plate, a middle ejector plate disposed on the top of the lower ejector plate, and an upper ejector plate disposed on the top of the middle ejector plate. The ejector pin output end is in contact with the bottom of the middle ejector plate.

[0015] Preferably, each of the inclined tops is connected to a movable column at its bottom, and a T-shaped plate is connected to the bottom of the movable column.

[0016] Preferably, the bottom end of the movable column penetrates downward through the upper top plate, and the bottom end of the T-shaped plate penetrates downward through the middle top plate and the lower top plate in sequence. The top of the middle top plate is provided with a sliding groove that matches the top of the T-shaped plate. A buffer gap is provided between the bottom of the two sides of the top of the T-shaped plate and the bottom wall of the sliding groove. The height of the buffer gap is set to 7mm.

[0017] Preferably, the bottom end of each of the top rods extends downward into the interior of the upper top plate and is connected to the upper top plate.

[0018] Preferably, each of the shovel bases includes a connecting block connected to the top of the top rod and a locking block connected to the connecting block.

[0019] Preferably, each slider has a slot on its inner side. The slot is T-shaped and tilted as a whole, with its top tip tilted away from the center of the mold core. The locking block is adapted to the slot.

[0020] Preferably, each slider has several limiting blocks inside, the limiting blocks are disposed through the slider and connected to the mold core at the bottom, and the slider has a clearance hole at each limiting block to accommodate the limiting block.

[0021] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0022] This invention uses an ejector pin assembly to drive an ejector rod to push the shovel base upwards. Since the slot and locking block are both tilted as a whole, as the shovel base moves upwards, the slider will move towards the center of the mold core, away from the periphery of the plastic product. This removes the wrapping around the plastic product, greatly reducing the clamping force on the plastic product. At the same time, as the central ejector plate moves upwards, after moving an upward buffer gap distance, it will push the T-shaped plate upwards, causing the inclined ejector to move upwards and push the plastic product, which has separated from the slider, upwards to complete the production. This avoids the phenomenon of the plastic product being damaged by the large clamping force during ejection, ensuring its production quality. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is an exploded view of the plastic-coated iron product and the mold core of this utility model;

[0026] Figure 3 This is a perspective view of the present utility model;

[0027] Figure 4 This is a diagram showing the distribution of the three sliders in this utility model;

[0028] Figure 5 This is a schematic diagram of the connection structure between the slider and the shovel base of this utility model;

[0029] Figure 6 This utility model Figure 5 Enlarged view of the A-section structure;

[0030] Figure 7 This is a schematic diagram of the connection structure between the inclined top and the connecting column of this utility model;

[0031] Figure 8 This is a schematic diagram of the connection structure between the slider and the shovel base of this utility model;

[0032] Figure 9 This is an exploded view of the slider and shovel base of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Rear mold, 2. B plate, 3. Mold core, 4. Slider, 41. Slot, 42. Limiting block, 43. Relief hole, 5. Shovel base, 51. Connecting block, 52. Engaging block, 6. Ejector pin, 7. Angled ejector, 8. Ejector pin assembly, 81. Ejector pin, 82. Lower ejector plate, 83. Middle ejector plate, 84. Upper ejector plate, 9. Front mold, 10. Base plate, 11. Moving pillar, 12. T-shaped plate, 13. Slide groove, 14. Buffer gap. Detailed Implementation

[0035] 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.

[0036] This utility model provides, for example Figure 1-9 The rear mold drive structure of a plastic-iron integrated injection mold shown includes a rear mold 1, the rear mold 1 includes a B plate 2 located above the rear mold 1, and a mold core 3 is installed at the top center of the B plate 2;

[0037] Three sliders 4 are provided, which are respectively installed on the front side and the left and right sides of the mold core 3 to support the plastic iron product;

[0038] A shovel base 5 is installed on the inner side of each of the sliders 4. A push rod 6 is installed at the bottom of each shovel base 5 to drive the slider 4 to slide toward the center of the mold core 3 in order to control the clamping force of the plastic product.

[0039] The inclined ejector 7 is installed at the four corners of the mold core 3 and can move upward to eject the plastic iron product that has been cured and formed at the mold core 3.

[0040] The ejector pin assembly 8 is located below the B plate 2 and is used to drive the ejector rod 6 and the inclined ejector 7 to move.

[0041] The ejector pin 81 plate driving structure of this integrated plastic-iron injection mold also includes a front mold 9 located above the rear mold 1. A mold cavity for plastic-iron molding is formed between the front mold 9 and the parting surface of the mold core 3, specifically as follows: Figure 2 As shown, reference numeral 15 in the attached figure indicates a plastic-coated iron product;

[0042] The rear mold 1 also includes a base plate 10 located below. The ejector pin assembly 8 is disposed on the top of the base plate 10. The ejector pin assembly 8 includes a plurality of ejector pins 81 installed on the top of the base plate 10, a lower ejector plate 82 disposed on the top of the base plate 10, a middle ejector plate 83 disposed on the top of the lower ejector plate 82, and an upper ejector plate 84 disposed on the top of the middle ejector plate 83. The output end of the ejector pins 81 is in contact with the bottom of the middle ejector plate 83.

[0043] In one embodiment, each of the inclined jacks 7 is connected to a movable column 11 at its bottom, and a T-shaped plate 12 is connected to the bottom of the movable column 11. The bottom end of the movable column penetrates downward through the upper jack plate 84, and the bottom end of the T-shaped plate 12 penetrates downward through the middle jack plate 83 and the lower jack plate 82 in sequence. The top of the middle jack plate 83 is provided with a groove 13 that matches the top end of the T-shaped plate 12. A buffer gap 14 is provided between the bottom of the two sides of the top end of the T-shaped plate 12 and the bottom wall of the groove 13. The height of the buffer gap 14 is set to 7mm. The bottom end of each push rod 6 extends downward into the interior of the upper jack plate 84 and is connected to the upper jack plate 84. When the middle jack plate 83 moves upward, the push rod 6 will first push the shovel upward. The base 5 moves upward, causing the slider 4 to move towards the center of the mold core 3 and away from the plastic product. After the top plate 83 moves upward by the height of a buffer gap 14, the bottom wall of the slide 13 will contact the bottom wall of the top of the T-shaped plate 12. At this time, the upward movement of the top plate 83 will drive the T-shaped plate 12 to move upward, and drive the inclined ejector 7 to move upward through the moving column 11, so that the plastic product is ejected. In this process, the driving force of the slider 4 and the inclined ejector 7 both come from the ejector pin assembly 8. However, due to the existence of the buffer gap 14, the inclined ejector 7 is one step slower than the slider 4, ensuring that the slider 4 is away from the plastic product before the inclined ejector 7 ejects the plastic product. Moreover, the power source is the ejector pin assembly 8, the structure is optimized, and it is simple and convenient to use.

[0044] In one embodiment, each shovel base 5 includes a connecting block 51 connected to the top of the push rod 6 and a locking block 52 connected to the connecting block 51. Each slider 4 has a slot 41 on its inner side. The slot 41 is T-shaped and is inclined as a whole, with its top tip inclined away from the center of the mold core 3. The locking block 52 is adapted to the slot 41. The slot 41 and the locking block 52 are inclined as a whole. When the shovel base 5 is lifted upward, the slider 4 has a driving force to move towards the center of the mold core 3 under the action of the inclined surface, thereby moving the slider 4 away from the plastic product and reducing the clamping force on the plastic product.

[0045] In one embodiment, each slider 4 is provided with a plurality of limiting blocks 42 inside. The limiting blocks 42 are disposed through the slider 4 and connected to the mold core 3 at the bottom, so that the sliding distance of the slider 4 is limited and the stability of the slider 4 during sliding is ensured. Each limiting block 42 is provided with a clearance hole 43 inside the slider 4 to accommodate the limiting block 42, providing a space for the limiting block 42.

[0046] The specific implementation method is as follows: When using this utility model, the steel plate used for molding is placed directly in the mold cavity, and then the molten glue is injected into the mold cavity through the gate. After the molten glue cools and solidifies, that is, when the plastic iron product is formed, the front mold 9 begins to move away from the rear mold 1, so that the parting surface opens and the top of the plastic iron product at the mold cavity is exposed.

[0047] Subsequently, multiple ejector pins 81 begin to work, driving the upper ejector plate 84, middle ejector plate 83, and lower ejector plate 82 to move upwards simultaneously. At this time, the bottom of the ejector rod 6, driven by the upper ejector plate 84, begins to move upwards as a whole, thereby pushing the shovel base 5 at its end to move upwards. That is, the locking block 52 moves upwards inside the locking groove 41. Since both the locking groove 41 and the locking block 52 are inclined as a whole, and both are inclined away from the center of the mold core 3 at their top, the slider 4 will have a driving force to move towards the center of the mold core 3 under the action of the inclined surface. At this time, as the upper ejector plate 84 moves upwards, under the linkage of the ejector pin 6, the three sliders 4 will move towards the center of the mold core 3 simultaneously, and then move away from the periphery of the plastic product, so that the periphery of the plastic product is no longer wrapped, thereby greatly reducing the clamping force on the plastic product and avoiding the phenomenon that the plastic product is damaged by the large clamping force when ejecting, thus ensuring its production quality.

[0048] As the three sliders 4 move towards the center of the mold core 3 and away from the periphery of the plastic iron product, the bottom wall of the middle top plate 83 located at the slide groove 13 will contact the bottom surface of the top of the T-shaped plate 12. At this time, when the middle top plate 83 continues to move upward, it will drive the T-shaped plate 12 to move upward, thereby driving the inclined ejector 7 to move upward, thus lifting the four corners of the plastic iron product upward, and then ejecting the entire plastic iron product. The operator can directly take out the molded plastic iron product, thus completing the production of the plastic iron product.

[0049] This embodiment specifically solves the problem in the prior art that, during the production of plastic-coated iron products, due to the presence of undercuts and glued areas on the three remaining sides (excluding the front side), the plastic-coated iron products are subjected to a large clamping force, making them easily stick to the mold core 3. Existing plastic-coated iron injection molds cannot reduce the clamping force on the plastic-coated iron products when ejecting them, often causing deformation around the product during ejection and greatly reducing the molding quality.

[0050] 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 rear mold drive structure for an integrated plastic-iron injection mold, characterized in that: Includes a rear mold (1), said rear mold (1) comprising: B plate (2) is located above the rear mold (1), and a mold core (3) is installed at the top center of B plate (2). Three sliders (4) are provided, which are respectively installed on the front side and the left and right sides of the mold core (3) to support the plastic iron product; A shovel base (5) is installed on the inner side of each of the sliders (4), and a push rod (6) is installed at the bottom of each shovel base (5) to drive the slider (4) to slide toward the center of the mold core (3) in order to control the clamping force of the plastic iron product; An inclined ejector (7) is installed at the four corners of the mold core (3) and can move upward to eject the plastic iron product that has been cured and formed at the mold core (3). The ejector assembly (8) is located below the B plate (2) and is used to drive the ejector rod (6) and the inclined ejector (7) to move.

2. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 1, characterized in that: The ejector pin (81) plate drive structure of the integrated plastic and iron injection mold also includes a front mold (9) located above the rear mold (1), and a mold cavity for plastic molding is formed between the front mold (9) and the parting surface of the mold core (3).

3. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 1, characterized in that: The rear mold (1) also includes a base plate (10) located below. The ejector assembly (8) is disposed on the top of the base plate (10). The ejector assembly (8) includes a plurality of ejector pins (81) installed on the top of the base plate (10), a lower ejector plate (82) disposed on the top of the base plate (10), a middle ejector plate (83) disposed on the top of the lower ejector plate (82), and an upper ejector plate (84) disposed on the top of the middle ejector plate (83). The output end of the ejector pin (81) is in contact with the bottom of the middle ejector plate (83).

4. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 3, characterized in that: Each of the sloping tops (7) is connected to a movable column (11) at its bottom, and a T-shaped plate (12) is connected to the bottom of the movable column (11).

5. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 4, characterized in that: The bottom end of the movable column penetrates downward through the upper top plate (84), and the bottom end of the T-shaped plate (12) penetrates downward through the middle top plate (83) and the lower top plate (82) in sequence. The top of the middle top plate (83) is provided with a sliding groove (13) that matches the top of the T-shaped plate (12). A buffer gap (14) is provided between the bottom of the two sides of the top of the T-shaped plate (12) and the bottom wall of the sliding groove (13). The height of the buffer gap (14) is set to 7mm.

6. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 3, characterized in that: Each of the top rods (6) extends downward into the interior of the upper top plate (84) and is connected to the upper top plate (84).

7. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 1, characterized in that: Each of the shovel bases (5) includes a connecting block (51) connected to the top of the top rod (6) and a locking block (52) connected to the connecting block (51).

8. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 7, characterized in that: Each slider (4) has a slot (41) on its inner side. The slot (41) is T-shaped and is tilted as a whole. The top of the slot is tilted away from the center of the mold core (3). The locking block (52) is adapted to the slot (41).

9. The rear mold drive structure of an integrated plastic-iron injection mold according to claim 7, characterized in that: Each slider (4) has several limiting blocks (42) inside. The limiting blocks (42) pass through the slider (4) and are connected to the mold core (3) at the bottom. Each limiting block (42) inside the slider (4) has a clearance hole (43) that can accommodate the limiting block (42).

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