Composite mold core-pulling structure

Abstract

The invention relates to the technical field of automobile lamp molds, in particular to a composite mold core-pulling structure which is used for products and comprises a mold core assembly, a pitched roof, a sliding block, a plate A, a plate B, an upper fixing plate and an ejector plate, the forming end of the pitched roof is inserted into the mold core assembly from the side face to form a cavity with modeling characteristics, and the sliding block is assembled on the pitched roof in a sliding mode in the horizontal direction. The forming end of the sliding block penetrates through the inclined ejector and then is inserted into the mold core assembly, the sliding block and the movable mold core form a cavity with functional characteristics, the plate A pushes the sliding block to be separated from the mold core assembly in the horizontal direction through the inclined guide column so as to complete core pulling with the functional characteristics, and the ejector plate pushes a product to vertically move upwards through the flat ejector rod to be separated from the movable mold core. The ejector pin plate pushes the inclined ejector to move in the extending direction of the inclined ejector rod and the extending direction of a sliding groove of the sliding seat fixing block through the sliding seat fixing block and the inclined ejector rod so as to be separated from the modeling characteristics conveniently, and product forming is completed. The technical problem that in the prior art, a mold structure cannot well achieve modeling characteristics and functional characteristics on a product is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive lamp mold technology, specifically a composite mold core-pulling structure. Background Technology

[0002] With the continuous development of the plastic products industry, product structures are also moving towards greater complexity and diversification. In order to meet the requirements of aesthetics, grip feel, and performance, injection molded products need to be configured with different curved shapes. However, the internal installation structure of plastic products needs to be simple, convenient, and sturdy. Therefore, there are often some conflicts between the external curved shape and the internal installation structure, which makes it impossible to realize some of the internal installation structures of plastic products through conventional mold structures.

[0003] like Figure 1 As shown, the product a includes a shape feature a1 formed on the main body and multiple spaced functional features a2. The shape feature a1 extends downward at an angle relative to the main body, and the functional features a2 extend horizontally relative to the main body. The functional features a2 are close to the shape feature a1 and formed below the shape feature a1. Conventional molding techniques are divided into three types:

[0004] The first method is to use shape feature a1 as the main element and functional feature a2 as the auxiliary element. Shape feature a1 remains unchanged, while functional feature a2 is adjusted. Specifically, to achieve shape feature a1, the mold core needs to be pulled out in a downward direction along the extension trend of shape feature a1. Functional feature a2 is adjusted accordingly to shorten the extension length of functional feature a2. However, this will reduce the contact and mating surface between functional feature a2 and the mating part, resulting in functional feature a2 (clamping) not being firm and posing a risk of clamping failure.

[0005] The second approach is to use functional feature a2 as the main feature and styling feature a1 as the secondary feature. Functional feature a2 remains unchanged, while styling feature a1 is adjusted. Specifically, styling feature a1 is adjusted horizontally according to functional feature a2 (snap-fit), but this will sacrifice the appearance of styling feature a1.

[0006] The third option is to keep both the shape feature a1 and the functional feature a2 unchanged, and then add glue to the back of the shape feature a1 in the direction of horizontal core pulling. However, this will result in a thicker wall on the shape surface of the shape feature a1, and there is a risk of appearance defects caused by shrinkage. Summary of the Invention

[0007] In order to solve the technical problem that the existing mold structure cannot well realize the shape and function features on the product, this application proposes a composite mold core-pulling structure, which solves the above-mentioned technical problem.

[0008] The technical solution adopted by this invention to solve its technical problem is:

[0009] This invention provides a composite mold core-pulling structure for an article, the article including a shape feature formed on a main body and multiple spaced functional features, the shape feature extending downwards at an angle relative to the main body, the functional features extending horizontally relative to the main body, the functional features being close to and below the shape feature, the composite mold core-pulling structure including: a mold core assembly including a moving mold core and a fixed mold core located above the moving mold core; a slanted ejector, the forming end of the slanted ejector being inserted from the side into the mold core assembly to form a cavity of the shape feature with the mold core assembly; and a slider, the slider being slidably mounted in the horizontal direction on the mold core assembly. On the inclined top, the forming end of the slider passes through the inclined top and inserts into the mold core assembly, forming a functional cavity with the moving mold core. An inclined guide post is fixed on the slider, with its top end horizontally close to the mold core assembly and its bottom end horizontally away from the mold core assembly. Plates A and B, when vertically closed, enclose and fix the mold core assembly, inclined top, and slider to complete mold closing. In the closed state, the top end of the inclined guide post is inserted into Plate B. An upper fixed plate is fixedly connected to Plate A and the fixed mold core, and the upper fixed plate drives Plate A and the fixed mold core... The mold core moves vertically upwards to open the mold. Plate A pushes the slider horizontally out of the mold core assembly via the inclined guide post to complete the core pulling of the functional feature. An ejector plate is positioned below Plate B. A sliding seat fixing block is fixed on the ejector plate. A sliding groove with the same extension direction as the inclined trend of the shape feature is formed on the sliding groove. An inclined ejector rod is disposed on the sliding groove, sliding along the extension direction of the sliding groove. The bottom end of the inclined ejector rod is limited on the sliding groove, and the top end of the inclined ejector rod is inserted into Plate B and extends into the inclined ejector, where it is fixedly connected. The top end of the ejector plate is horizontally away from the mold core assembly, and the bottom end is horizontally close to the mold core assembly. Multiple flat ejector rods are also fixed to the ejector plate. The top ends of the flat ejector rods are inserted into the main body of the product to limit its movement horizontally. After the core-pulling of the functional feature is completed, the ejector plate moves vertically upward. The ejector plate pushes the product vertically upward through the flat ejector rods to detach from the moving mold core. The ejector plate, through the sliding seat fixing block and the inclined ejector rod, pushes the inclined ejector rod to move simultaneously along the extension direction of the inclined ejector rod and the extension direction of the sliding groove of the sliding seat fixing block, thus smoothly detaching from the shaping feature and completing the product molding.

[0010] Furthermore, the inclined push rod is slidably engaged with the sliding seat fixing block via the inclined push rod sliding seat. The inclined push rod fixing block is fixedly connected to the bottom end of the inclined push rod, and the inclined push rod fixing block is fixedly connected to the inclined push rod sliding seat. A sliding seat pressure strip is fixedly connected to the sliding seat fixing block. The sliding seat pressure strip presses against the upward-facing end faces of the two convex edges of the inclined push rod sliding seat, so that the inclined push rod sliding seat can only move along the extension direction of the sliding groove after being subjected to force.

[0011] Furthermore, it also includes a protective rod, the top end of which is hinged to the bottom end of the B plate. The bottom end of the protective rod passes through the ejector plate and extends into the lower fixing plate located below the ejector plate, where it is hinged. The rod body is movably fitted inside a protective sleeve, which is connected to the inclined ejector sliding seat. Simultaneously, an obstacle clearance space is formed on the inclined ejector sliding seat for the protective rod to move.

[0012] Furthermore, a slanted push rod guide block is fixed to the bottom end of the B plate, and the slanted push rod guide block is penetrated by the slanted push rod. At the same time, the top end of the protective rod is connected to the slanted push rod guide block.

[0013] Furthermore, the inclined top has a plurality of slider assembly spaces for assembling the slider, and the portion of the slider assembly space near the mold core assembly has a channel for the forming end of the slider to pass through, and the slider assembly space has a clearance cavity for the slider to move away from the mold core assembly.

[0014] Furthermore, the bottom surface of the clearance cavity that mates with the slider is a horizontal surface. At the same time, a slider pressure bar fixed on the inclined top is provided at the slider assembly space. The slider pressure bar presses against the upper end surfaces on both sides of the slider to limit the slider, so that the slider can only move in the horizontal direction after being pushed.

[0015] Furthermore, a fixed mold bolt is fixed to the upper end face of the slider, and the fixed mold bolt cooperates with the groove step on the inclined guide post to limit the inclined guide post on the slider.

[0016] Based on the above technical solution, the technical effects that the present invention can achieve are as follows:

[0017] The composite mold core-pulling structure of this invention forms a cavity with functional features by a slider and a moving mold core, and a cavity with shaped features by an inclined ejector and the mold core assembly. During demolding, the slider first exits horizontally to complete the core-pulling of the functional features, thereby protecting the effectiveness of the functional surfaces. Then, under the action of the inclined ejector rod and the sliding seat fixing block, the inclined ejector moves simultaneously along the extension direction of the inclined ejector rod and the extension direction of the sliding groove of the sliding seat fixing block. First, because both are driven by the ejector plate, the inclined ejector will rise synchronously with the product. While rising, because the top of the inclined ejector rod is away from the product in the horizontal direction, the inclined ejector will gradually move away from the product in the horizontal direction under the action of the inclined ejector rod. Also, because the inclined ejector rod moves along the extension direction of the sliding groove (the extension direction of the sliding groove is the same as the inclination trend direction of the shaped features), the inclined ejector also has a trajectory along the inclination trend direction of the shaped features, so that the inclined ejector will smoothly detach from the shaped features, complete the product molding, protect the shaped features of the product from changing, and ensure that the product surface has no appearance defects. This solves the technical problem that the mold structure in the prior art cannot well realize the shaped features and functional features on the product. Attached Figure Description

[0018] Figure 1 An illustration of the product of the invention;

[0019] Figure 2 A cross-sectional view of the composite mold core-pulling structure of the invention in the mold-closed state;

[0020] Figure 3 A cross-sectional view of the composite mold core-pulling structure of the invention at the slider;

[0021] Figure 4 A cross-sectional view of the composite mold core-pulling structure of the invention after the functional features have been pulled out.

[0022] Figure 5 This is a partial structural diagram of the composite mold core-pulling structure of the invention;

[0023] Figure 6 This is an anatomical diagram of the sliding seat fixing block of the composite mold core-pulling structure of the invention.

[0024] Figure 7 A schematic diagram of the inclined top of the composite mold core-pulling structure of the invention;

[0025] Figure 8 This is a schematic diagram of the flat top rod of the composite mold core-pulling structure of the invention.

[0026] Where: a-product, a1-shape features, a2-functional features;

[0027] 1-Mold core assembly, 11-Moving mold core, 12-Fixed mold core;

[0028] 2-Angled top, 21-Angled top rod, 22-Angled top rod fixing block, 23-Slider assembly space, 231-Leaning cavity, 24-Slider pressure strip;

[0029] 3-Slider, 31-Angled guide post, 311-Fixed mold bolt, 312-Groove step;

[0030] 4-A board;

[0031] 5-B plate, 51-slanted top rod guide block, 52-guide sleeve;

[0032] 6-Upper fixing plate;

[0033] 7-Ejector plate, 71-Flat ejector rod;

[0034] 8-Sliding seat fixing block, 81-Sliding groove, 82-Angled push rod sliding seat, 821-Protruding edge, 83-Sliding seat pressure strip, 84-Protective rod, 85-Protective sleeve, 86-Allowing space;

[0035] 9-Lower fixing plate, 91-Connector. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1-8As shown, this invention provides a composite mold core-pulling structure for product a. Product a includes a shape feature a1 and multiple functional features a2 formed on a main body. The shape feature a1 extends downward at an angle relative to the main body, and the functional features a2 extend horizontally relative to the main body. The functional features a2 are close to the shape feature a1 and formed below the shape feature a1. The composite mold core-pulling structure includes a mold core assembly 1, an inclined ejector 2, a slider 3, an A plate 4, a B plate 5, an upper fixed plate 6, and an ejector plate 7. The mold core assembly 1 includes a moving mold core 11 and a fixed mold core 12 located above the moving mold core 11. The forming end of the inclined ejector 2 is inserted into the mold core assembly 1 from the side and then... A cavity forming shape feature a1 is formed. Slider 3 is slidably mounted on the inclined ejector 2 in the horizontal direction. The forming end of slider 3 passes through the inclined ejector 2 and inserts into the mold core assembly 1, forming a cavity with the moving mold core 11 to form functional feature a2. An inclined guide post 31 is fixed on slider 3. The top end of the inclined guide post 31 is close to the mold core assembly 1 in the horizontal direction, and the bottom end is far away from the mold core assembly 1 in the horizontal direction. Plate A 4 and Plate B 5, after being closed in the vertical direction, enclose and fix the mold core assembly 1, the inclined ejector 2, and slider 3 to complete mold closing. In the closed state, the top end of the inclined guide post 31 is inserted into Plate B 5. Plate A 4 and the fixed mold core 12 are fixedly connected to the upper fixed plate 6. The fixed plate 6 drives the A plate 4 and the fixed mold core 12 to move vertically upward together to open the mold. The A plate 4 pushes the slider 3 to eject the mold core assembly 1 horizontally through the inclined guide post 31 to complete the core pulling of the functional feature a2. The ejector plate 7 is arranged below the B plate 5. A sliding seat fixing block 8 is fixed on the ejector plate 7. A sliding groove 81 is formed on the sliding seat fixing block 8, with the extension direction being the same as the inclination direction of the shape feature a1. An inclined ejector rod 21 is arranged on the sliding groove 81, which slides along the extension direction of the sliding groove 81. The bottom end of the inclined ejector rod 21 is limited on the sliding groove 81. The top end of the inclined ejector rod 21 is inserted into the B plate 5 and extends into the inclined ejector 2 and is fixedly connected to the inclined ejector 2. The top of 21 is horizontally away from the mold core assembly 1, and the bottom is horizontally close to the mold core assembly 1. Multiple flat ejector rods 71 ​​are also fixed on the ejector plate 7. The top of the flat ejector rods 71 ​​is inserted into the body of the product a to limit the product a in the horizontal direction. After the core pulling of the functional feature a2 is completed, the ejector plate 7 moves vertically upward. The ejector plate 7 pushes the product a vertically upward to separate from the moving mold core 11 through the flat ejector rods 71. The ejector plate 7 pushes the inclined ejector 2 to move along the extension direction of the inclined ejector rod 21 and the extension direction of the sliding groove 81 of the sliding seat fixing block 8, so as to separate from the shaping feature a1 and complete the molding of the product a.

[0038] In one specific embodiment of the present invention, the inclined push rod 21 is slidably engaged with the sliding seat fixing block 8 via the inclined push rod sliding seat 82. An inclined push rod 21 fixing block 22 is fixedly connected to the bottom end of the inclined push rod 21, and the inclined push rod 21 fixing block 22 is fixedly connected to the inclined push rod sliding seat 82. A sliding seat pressure strip 83 is fixedly connected to the sliding seat fixing block 8, and the sliding seat pressure strip 83 presses against the upward-facing end faces of the two protruding edges 821 on both sides of the inclined push rod sliding seat 82, so that the inclined push rod sliding seat 82 can only move along the extension direction of the sliding groove 81 after being subjected to force. It should be noted that there are two sliding seat pressure strips 83, distributed on both sides of the inclined push rod sliding seat 82. Figure 6 Only one sliding seat pressure bar 83 is shown in the image.

[0039] Furthermore, it also includes a protective rod 84, the top end of which is hinged to the bottom end of plate B 5. The bottom end of the protective rod 84 passes through the ejector plate 7 and extends into the lower fixing plate 9 located below the ejector plate 7 and is hinged to the lower fixing plate 9. A connector 91 can be installed in the lower fixing plate 9 to connect with the bottom end of the protective rod 84. The rod body of the protective rod 84 is movably fitted inside the protective sleeve 85. The protective sleeve 85 is connected to the inclined ejector sliding seat 82. At the same time, an obstacle space 86 is formed on the inclined ejector sliding seat 82 for the protective rod 84 to move.

[0040] Because the tilt angle of the shape feature a1 is large, the falling angle of the inclined top 2 is also large, exceeding 20°, which can easily cause structural instability. Therefore, a protective rod 84 is added to disperse the oblique force on the inclined top rod 21 and increase the structural stability.

[0041] Furthermore, a slanted push rod guide block 51 is fixed to the bottom end of plate B 5, and the slanted push rod 21 passes through the slanted push rod guide block 51. At the same time, the top end of the protective rod 84 is connected to the slanted push rod guide block 51. A guide sleeve 52 can also be configured at the transition between the slanted push rod 21 and the slanted push rod 2 to protect the slanted push rod 21 and the slanted push rod 2.

[0042] In a specific embodiment of the present invention, a slider assembly space 23 for assembling multiple sliders 3 is formed on the inclined top 2. The portion of the slider assembly space 23 near the mold core assembly 1 is formed with a channel through which the forming end of the slider 3 passes. The slider assembly space 23 is formed with a clearance cavity 231 that allows the slider 3 to move away from the mold core assembly 1.

[0043] Preferably, the part of the slider 3 that inserts into the inclined top 2 has a narrow end and a wide tail shape to facilitate the insertion of the slider 3.

[0044] Furthermore, the bottom surface of the cavity 231 that mates with the slider 3 is a horizontal surface. At the same time, a slider pressure bar 24 fixed on the inclined top 2 is provided at the slider assembly space 23. The slider pressure bar 24 presses against the upper end surface on both sides of the slider 3 to limit the slider 3, so that the slider 3 can only move in the horizontal direction after being pushed.

[0045] In a specific embodiment of the present invention, a fixed mold bolt 311 is fixed on the upper end face of the slider 3. The fixed mold bolt 311 cooperates with the groove step 312 on the inclined guide post 31 to limit the inclined guide post 31 on the slider 3.

[0046] It should be understood that the specific embodiments described above are for illustrative purposes only and are not intended to limit the scope of the invention. Obvious variations or modifications derived from the spirit of the invention are still within the protection scope of the invention.

Claims

1. A composite mold core-pulling structure for an article (a), the article (a) comprising a shape feature (a1) formed on a body and a plurality of spaced functional features (a2), the shape feature (a1) extending downward at an angle relative to the body, the functional features (a2) extending horizontally relative to the body, the functional features (a2) being close to and below the shape feature (a1), characterized in that, The composite mold core-pulling structure includes: Mold core assembly (1), the mold core assembly (1) includes a movable mold core (11) and a fixed mold core (12) located above the movable mold core (11); The inclined top (2) is inserted from the side into the mold core assembly (1) and forms a cavity of the shaping feature (a1) with the mold core assembly (1); A slider (3) is slidably mounted on the inclined top (2) in the horizontal direction. The forming end of the slider (3) passes through the inclined top (2) and is inserted into the mold core assembly (1) to form a cavity with the moving mold core (11) for the functional feature (a2). An inclined guide post (31) is fixed on the slider (3). The top end of the inclined guide post (31) is close to the mold core assembly (1) in the horizontal direction, and the bottom end is far away from the mold core assembly (1) in the horizontal direction. Plate A (4) and Plate B (5), after the plates A (4) and B (5) are closed in the vertical direction, they enclose and fix the mold core assembly (1), the inclined top (2) and the slider (3) to complete the mold closing. In the mold closing state, the top of the inclined guide post (31) is inserted into the plate B (5). The upper fixed plate (6) is fixedly connected to the A plate (4) and the fixed mold core (12). The upper fixed plate (6) drives the A plate (4) and the fixed mold core (12) to move vertically upward together to open the mold. The A plate (4) pushes the slider (3) through the inclined guide post (31) to release the mold core assembly (1) in the horizontal direction to complete the core pulling of the functional feature (a2). Ejector plate (7), which is disposed below plate B (5), has a sliding seat fixing block (8) fixed on it. The sliding seat fixing block (8) has a sliding groove (81) with the same extension direction as the inclined trend direction of the shape feature (a1). An inclined ejector rod (21) that slides along the extension direction of the sliding groove (81) is disposed on the sliding groove (81). The bottom end of the inclined ejector rod (21) is limited on the sliding groove (81). The top end of the inclined ejector rod (21) is inserted into plate B (5) and extends into the inclined ejector (2) and is fixedly connected to the inclined ejector (2). The top end of the inclined ejector rod (21) is away from the mold core assembly (1) in the horizontal direction, and the bottom end is close to the mold core assembly (1) in the horizontal direction. The mold core assembly (1) has multiple flat ejector rods (71) fixed on the ejector plate (7). The top of the flat ejector rod (71) is inserted into the body of the product (a) to limit the product (a) in the horizontal direction. After the core of the functional feature (a2) is pulled out, the ejector plate (7) moves vertically upward. The ejector plate (7) pushes the product (a) to move vertically upward and get away from the moving mold core (11) through the flat ejector rod (71). The ejector plate (7) pushes the inclined ejector (2) along the extension direction of the inclined ejector rod (21) and the extension direction of the sliding groove (81) of the sliding seat fixing block (8) to get away from the shaping feature (a1) and complete the molding of the product (a).

2. The composite mold core-pulling structure according to claim 1, characterized in that, The inclined push rod (21) is slidably engaged with the sliding seat fixing block (8) via the inclined push rod sliding seat (82). The inclined push rod (21) fixing block (22) is fixedly connected to the bottom end of the inclined push rod (21). The inclined push rod (21) fixing block (22) is fixedly connected to the inclined push rod sliding seat (82). The sliding seat fixing block (8) is fixedly connected with the sliding seat pressure strip (83). The sliding seat pressure strip (83) presses against the upward end face of the two protruding edges (821) on both sides of the inclined push rod sliding seat (82), so that the inclined push rod sliding seat (82) can only move along the extension direction of the sliding groove (81) after being subjected to force.

3. The composite mold core-pulling structure according to claim 2, characterized in that, It also includes a protective rod (84), the top end of which is hinged to the bottom end of the B plate (5). The bottom end of the protective rod (84) passes through the ejector plate (7) and extends into the lower fixing plate (9) located below the ejector plate (7) and is hinged to the lower fixing plate (9). The rod body of the protective rod (84) is movably fitted inside the protective sleeve (85). The protective sleeve (85) is connected to the inclined ejector sliding seat (82). At the same time, an obstacle space (86) is formed on the inclined ejector sliding seat (82) for the protective rod (84) to move.

4. The composite mold core-pulling structure according to claim 3, characterized in that, The bottom end of the B plate (5) is fixed with a slanted rod guide block (51), which is penetrated by the slanted rod (21). At the same time, the top end of the protective rod (84) is connected to the slanted rod guide block (51).

5. The composite mold core-pulling structure according to claim 1, characterized in that, The inclined top (2) has a plurality of slider assembly spaces (23) for assembling the slider (3). The portion of the slider assembly space (23) near the mold core assembly (1) has a channel through which the forming end of the slider (3) passes. The slider assembly space (23) has a clearance cavity (231) that allows the slider (3) to move away from the mold core assembly (1).

6. The composite mold core-pulling structure according to claim 5, characterized in that, The bottom surface of the clearance cavity (231) that mates with the slider (3) is a horizontal surface. Meanwhile, a slider pressure strip (24) fixed on the inclined top (2) is provided at the slider assembly space (23). The slider pressure strip (24) presses against the upper end surface on both sides of the slider (3) to limit the slider (3), so that the slider (3) can only move in the horizontal direction after being pushed.

7. The composite mold core-pulling structure according to claim 1, characterized in that, The upper end face of the slider (3) is fixed with a mold bolt (311), and the mold bolt (311) cooperates with the groove step (312) on the inclined guide post (31) to limit the inclined guide post (31) on the slider (3).

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