Inverted buckle inclined top sequential ejection demolding mechanism and mold

Abstract

The utility model discloses a reverse buckle pitched roof sequential ejection demolding mechanism and a mold, the reverse buckle pitched roof sequential ejection demolding mechanism comprises a movable mold core, a first pitched roof and a second pitched roof, the movable mold core comprises a mold core and a cavity, and the first pitched roof comprises a first guide block, a first slide block and a first inclined push rod; each second inclined ejector comprises a second guide block, a second slide block and a second inclined push rod; the cavity comprises a first inclined surface and a second inclined surface; the first guide block is fixedly arranged on the first inclined surface, and the second guide block is fixedly arranged on the second inclined surface; the included angle between the first inclined surface and the vertical surface is larger than that between the second inclined surface and the vertical surface; the contact surface of the first guide block and the second guide block is an inclined surface, and the area of the first guide block on the horizontal plane is gradually increased in the movement direction during mold opening. And the sequential movement between the sliding blocks can be realized on the whole, so that a complicated mold structure in the traditional inverted buckle forming process is avoided, and the manufacturing cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an undercut inclined ejector sequential ejection and demolding mechanism and a mold. Background Art

[0002] Existing injection-molded products such as box shells, lids, panels, etc. all have many undercuts on the inner wall. In the traditional mold structure, when there are undercuts on the inner peripheral circle, there are the following two problems in the mold structure design:

[0003] 1. The mold structure needs to combine an inclined ejector and an inner slider. An elastic plate needs to be added to the inner slider to fix and lock the slider, which makes the mold structure complex, increases the overall thickness of the mold and the ejection stroke required during demolding, thus increasing the manufacturing cost.

[0004] 2. An inner contraction structure is designed, and the inner contraction insert is driven by a dovetail groove to move inwards synchronously to disengage from the undercut and then eject. However, this design also has some problems, such as too many dovetail groove clamping lines, high precision requirements, expensive mold cost, and the clamping lines may affect the product quality.

[0005] Based on this, this case proposes an undercut inclined ejector sequential ejection and demolding mechanism and a mold. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model provides an undercut inclined ejector sequential ejection and demolding mechanism and a mold, including a moving mold core, at least one first inclined ejector and at least one second inclined ejector. The moving mold core includes a mold core and a cavity protruding from the mold core. Each first inclined ejector includes a first guide block, a first slider and a first inclined push rod; each second inclined ejector includes a second guide block, a second slider and a second inclined push rod; the cavity includes at least one first inclined surface and at least one second inclined surface; the first guide block is fixedly arranged on the first inclined surface to guide the first slider to slide along the outer wall of the first inclined surface during mold opening and closing, and the second guide block is fixedly arranged on the second inclined surface to guide the second slider to slide along the outer wall of the second inclined surface during mold opening and closing; before mold opening, the outer surfaces of the cavity, the first guide block and the second guide block jointly form a molding surface for molding the inner wall of the product; the included angle between the first inclined surface and the vertical surface is greater than the included angle between the second inclined surface and the vertical surface; the contact surface between the first guide block and the second guide block is an inclined surface, and the area of the first guide block on the horizontal plane gradually increases in the movement direction during mold opening.

[0007] As a further improvement, the product to be molded is box-shaped. The cavity includes a main block and two extension blocks. The number of the first lifters is three. The two extension blocks separate the two first guiding blocks respectively. The upper surface of the cavity and the upper surfaces of the three first guiding blocks form an isosceles trapezoid when the mold is not opened. The second inclined surface is arranged on the extension block.

[0008] As a further improvement, the number of the second lifters is two. Each second guiding block is in inclined surface contact with the two first guiding blocks. The upper surface of the cavity, the upper surfaces of the two second guiding blocks and the upper surfaces of the three first guiding blocks form a square when the mold is not opened.

[0009] As a further improvement, define the angle between the first inclined surface and the vertical plane as α, where the range of α is 15° to 20°. Define the angle between the second inclined surface and the vertical plane as β, where the range of β is 10° to 14°.

[0010] As a further improvement, cooling water channels are arranged in the first inclined push rod and the second inclined push rod.

[0011] As a further improvement, the first lifter further includes a first guiding rod, a first guiding seat and a first double-joint top seat. The first guiding rod is arranged parallel to the first inclined push rod. The bottoms of the first guiding rod and the first inclined push rod are respectively movably connected to the double-joint top seat. The first guiding seat is used to guide the tops of the first guiding rod and the first inclined push rod.

[0012] A mold adopts the demolding mechanism described above.

[0013] In the reverse lifter sequential ejection demolding mechanism provided by the present utility model, as a whole, the first lifter cooperates with the first inclined surface, and the second lifter cooperates with the second inclined surface. At the same time, in combination with the structural design that the angle between the first inclined surface and the vertical plane is greater than the angle between the second inclined surface and the vertical plane, it can effectively achieve sequential ejection during mold opening. That is, due to the larger angle of the first lifter, when ejecting the first lifter and the second lifter simultaneously during mold opening, both the first lifter and the second lifter will have displacements in the vertical and horizontal directions to form a lifter action. When the moving distance in the vertical direction is the same, the moving distance of the first lifter towards the inside of the mold core will be greater. Therefore, it will reserve enough space in advance for the inward horizontal movement of the second lifter to achieve demolding. The overall demolding structure design is ingenious and reasonable. Only through the design of the angle, the sequential movement between the sliders can be achieved, avoiding the complex processes of designing retraction structures and spring plates in the traditional mold structure for forming reverse buckles, and effectively reducing the manufacturing cost. Description of the Drawings

[0014] Figure 1 It is a product drawing of the shoe box to be molded by the present utility model;

[0015] Figure 2 This is a schematic structural diagram of an inverted inclined ejector sequential ejection and demolding mechanism of the present utility model;

[0016] Figure 3 This is a schematic structural diagram showing the bottom of an inverted inclined ejector sequential ejection and demolding mechanism of the present utility model;

[0017] Figure 4 This is a schematic structural diagram of an inverted inclined ejector sequential ejection and demolding mechanism of the present utility model after hiding a first guiding block and a second guiding block;

[0018] Figure 5 This is an exploded schematic diagram of an inverted inclined ejector sequential ejection and demolding mechanism of the present utility model when showing the first inclined ejector and the second inclined ejector;

[0019] Figure 6 This is a schematic structural diagram of a mold of the present utility model.

[0020] Wherein: 10, moving mold core; 11, mold core; 12, cavity; 121, first inclined surface; 122, second inclined surface; 123, main body block; 124, extension block; 20, first inclined ejector; 21, first guiding block; 211, first sliding member; 212, first sliding block; 22, first slider; 221, first sliding groove; 23, first inclined push rod; 24, first guiding rod; 25, first guiding seat; 26, first double-joint ejector seat; 30, second inclined ejector; 31, second guiding block; 32, second slider; 33, second inclined push rod; 40, water supply water pipe. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the following combines specific embodiments to further elaborate the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present utility model. The experimental methods in the following embodiments, unless otherwise specified, are all conventional methods. The materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 5 , an inverted inclined lifter sequential ejection and demolding mechanism, comprising a moving die core 10, at least one first inclined lifter 20 and at least one second inclined lifter 30. The first inclined lifter 20 and the second inclined lifter 30 work together to form, such as Figure 1The reverse buckling of the shoe box in it, and the reverse buckling is distributed on three surfaces of the inner side of the shoe box; the moving die core 10 includes a die core 11 and a cavity 12 protruding from the die core 11. Each of the first inclined ejector pins 20 includes a first guide block 21, a first slider 22 and a first inclined ejector rod 23. The first guide block 21 includes a first sliding member 211 and a first sliding block 212 which are detachably and fixedly connected; each second inclined ejector pin 30 includes a second guide block 31, a second slider 32 and a second inclined ejector rod 33; the cavity 12 includes at least one first inclined surface 121 and at least one second inclined surface 122; the first guide block 21 is fixedly arranged on the first inclined surface 121 for guiding the first slider 22 to slide along the outer wall of the first inclined surface 121 during mold opening and closing. Each of the first sliders 22 is provided with two first sliding grooves 221, and the first sliding member 211 can achieve limited sliding in the first sliding groove 1211. The second guide block 31 is fixedly arranged on the second inclined surface 122 for guiding the second slider 32 to slide along the outer wall of the second inclined surface 122 during mold opening and closing; when the mold is not opened, the outer surfaces of the cavity 12, the first guide block 21 and the second guide block 31 jointly form a molding surface for molding the inner wall of the product, and the outer side surfaces of the first guide block 21 and the second guide block 31 form a reverse buckling molding groove for molding the reverse buckling of the product; the angle between the first inclined surface 121 and the vertical surface is greater than the angle between the second inclined surface 122 and the vertical surface; the contact surface between the first guide block 21 and the second guide block 31 is an inclined surface, and the area of the first guide block 21 on the horizontal plane gradually becomes larger in the moving direction during mold opening.

[0025] The overall structure adopts the first inclined ejector pin 20 cooperating with the first inclined surface 121 and the second inclined ejector pin 30 cooperating with the second inclined surface 122. At the same time, combined with the structural design that the angle between the first inclined surface 121 and the vertical surface is greater than the angle between the second inclined surface 122 and the vertical surface, it can effectively realize the sequential ejection during mold opening. That is, due to the larger angle of the first inclined ejector pin 20, when the first inclined ejector pin 20 and the second inclined ejector pin 30 are ejected simultaneously during mold opening, both the first inclined ejector pin 20 and the second inclined ejector pin 30 will have displacements in the vertical direction and the horizontal direction to form an inclined ejector pin action. When the moving distances in the vertical direction are the same, the moving distance of the first inclined ejector pin 20 towards the inside of the die core will be greater. Therefore, it will reserve enough space in advance for the inward horizontal movement of the second inclined ejector pin 30. The overall demoulding structure design is ingenious and reasonable. This demoulding structure can realize the sequential movement between the sliders only through the design of the angle of the inclined ejector pins. Only a horizontal slider needs to be arranged outside the moving die core for molding the outer surface of the product, and there is no need to set a horizontal moving slider on the inner surface, avoiding the complex processes of designing a retracting structure or designing a horizontal moving slider and a spring plate in the moving die core in the traditional mold structure for forming reverse buckling, improving the product quality, reducing the problem of excessive wire clamping and flash, and at the same time effectively reducing the manufacturing cost.

[0026] Please refer to Figure 1 、 Figure 2 and Figure 4 For the product to be molded which is box-shaped, the cavity 12 includes a main block 123 and two extension blocks 124. The second inclined surface 122 is disposed on the extension block 124, that is, the outer side surface of the extension block 124 is used to form the second inclined surface 122 for arranging the second guiding block 31. The number of the first lifters 20 is three, and the two extension blocks 124 separate the two first guiding blocks 21 respectively. The upper surface of the cavity 12 and the upper surfaces of the three first guiding blocks 21 form an isosceles trapezoid when the mold is not opened. By forming the overall structure of the isosceles trapezoid, sufficient space at two corners is reserved to arrange the second lifter 30. Its structural idea can be used for molding other boxed products, and the number of the first lifter 20 and the second lifter 30 can be flexibly set according to the specific undercut quantity and position of the boxed product.

[0027] Furthermore, the number of the second lifters 30 is two. Each second guiding block 31 is in inclined surface contact with the two first guiding blocks 21. The upper surface of the cavity 12, the upper surfaces of the two second guiding blocks 31 and the upper surfaces of the three first guiding blocks 21 form a square when the mold is not opened. Its overall square demolding structure can effectively cooperate with the boxed product, will not increase the overall height of the mold core, and does not require adding other components and materials due to the retraction structure, and its overall manufacturing cost is lower.

[0028] Even further, define the angle between the first inclined surface 121 and the vertical plane as α, where the range of α is 15° to 20°, preferably, the value of α is 18°. Define the angle between the second inclined surface 122 and the vertical plane as β, where the range of β is 10° to 14°, preferably, the value of β is 12°. By setting appropriate angles for the two inclined surfaces, the overall ejection speed in sequence can be effectively controlled, avoiding the situation that the ejection process of the first lifter 20 is unstable and jammed due to too large a difference in angles, and the second lifter 30 does not have enough space to eject due to too small a difference in angles, thereby resulting in too long overall ejection time.

[0029] Please refer to Figure 2 and Figure 3 Cooling water channels are arranged in the first inclined push rod 23 and the second inclined push rod 33, and a water supply water pipe 40 is arranged outside at the same time. By cooling the first guiding block 21 and the second guiding block 31, the overall molding time is reduced.

[0030] Please refer to Figure 2 and Figure 3, the first lifter 20 further includes a first guide rod 24, a first guide seat 25 and a first double-joint top seat 26. The first guide rod 24 is arranged parallel to the first inclined push rod 23. The bottoms of the first guide rod 24 and the first inclined push rod 23 are respectively movably connected to the double-joint top seat. The first guide seat 25 is used to guide the tops of the first guide rod 24 and the first inclined push rod 23. The number of the first guide seats 25 in each first lifter 20 is two, which are respectively connected to the top of the first guide rod 24 and the top of the first inclined push rod 23. The structure of the first double-joint top seat 26 is used to carry the first inclined push rod 23 and the first guide rod 24 at the same time, and the guiding effect of the first guide rod 24 provides a double insurance for the lifter process to avoid the jamming problem during the lifter process.

[0031] Please refer to Figure 6 , a mold adopting the demolding mechanism to achieve the rapid demolding of boxed products. The overall structure is ingeniously designed and the manufacturing cost is low.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ejection mechanism for reverse ejection of inclined lifters, characterized in that: It includes a moving mold core (10), at least one first lifter (20) and at least one second lifter (30). The moving mold core (10) includes a mold core (11) and a cavity (12) protruding from the mold core (11). Each first lifter (20) includes a first guiding block (21), a first slider (22) and a first inclined ejector rod (23); each second lifter (30) includes a second guiding block (31), a second slider (32) and a second inclined ejector rod (33); the cavity (12) includes at least one first inclined surface (121) and at least one second inclined surface (122); the first guiding block (21) is fixedly arranged on the first inclined surface (121) to guide the first slider (22) to slide along the outer wall of the first inclined surface (121) during mold opening and closing, and the second guiding block (31) is fixedly arranged on the second inclined surface (122) to guide the second slider (32) to slide along the outer wall of the second inclined surface (122) during mold opening and closing; when the mold is not opened, the outer surfaces of the cavity (12), the first guiding block (21) and the second guiding block (31) together form a molding surface for molding the inner wall of the product; the angle between the first inclined surface (121) and the vertical plane is greater than the angle between the second inclined surface (122) and the vertical plane; the contact surface between the first guiding block (21) and the second guiding block (31) is an inclined surface, and the area of the first guiding block (21) on the horizontal plane gradually increases in the moving direction during mold opening.

2. The ejection demolding mechanism for reverse ejector pins in sequential ejection according to claim 1, characterized in that: The product to be molded is box-shaped. The cavity (12) includes a main body block (123) and two extension blocks (124). The number of the first lifters (20) is three. The two extension blocks (124) separate the two first guiding blocks (21) respectively. The upper surface of the cavity (12) and the upper surfaces of the three first guiding blocks (21) form an isosceles trapezoid when the mold is not opened. The second inclined surface (122) is arranged on the extension block (124).

3. The reverse ejection and inclined lifter sequential ejection and demolding mechanism according to claim 2, wherein: The number of the second lifters (30) is two. Each second guiding block (31) is in inclined surface contact with the two first guiding blocks (21). The upper surface of the cavity (12), the upper surfaces of the two second guiding blocks (31) and the upper surfaces of the three first guiding blocks (21) form a square when the mold is not opened.

4. The reverse ejection and inclined lifter sequential ejection and demolding mechanism according to claim 1, characterized in that: Define the angle between the first inclined surface (121) and the vertical plane as α, where the range of α is 15° - 20°, and define the angle between the second inclined surface (122) and the vertical plane as β, where the range of β is 10° - 14°.

5. The reverse ejection and inclined lifter sequential ejection and demolding mechanism according to claim 1, wherein: Cooling water channels are arranged in the first inclined ejector rod (23) and the second inclined ejector rod (33).

6. The reverse draw lifter sequential ejection and demolding mechanism according to claim 1, wherein: The first lifter (20) further includes a first guide rod (24), a first guide seat (25), and a first double-joint top seat (26). The first guide rod (24) is arranged parallel to the first inclined push rod (23), and the bottoms of the first guide rod (24) and the first inclined push rod (23) are respectively movably connected to the double-joint top seat. The first guide seat (25) is used to guide the tops of the first guide rod (24) and the first inclined push rod (23).

7. A mold, characterized in that: Adopt the demolding mechanism according to any one of claims 1-6.

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