Demolding mechanism for different-direction reverse buckling structure

Abstract

The invention relates to the technical field of injection molds, and provides a demolding mechanism for an incongruous back-off structure, which comprises a movable mold, and the movable mold is provided with a separable inclined ejector block; a movable block capable of linearly sliding is arranged on the movable mold; a linkage rail is arranged on the movable block, and a linkage groove in sliding fit with the linkage rail is formed in the inclined ejector block; a movable mold plate is arranged on one side of the movable mold, and a push plate capable of moving in a reciprocating mode is further arranged between the movable mold plate and the movable mold. Therefore, the movable block linked with the inclined ejector block is arranged on the movable mold; the inclined ejector block forms a first inverted buckle structure of a product, and the movable block forms a second inverted buckle structure of the product. When the mold is opened, the movable block is restrained in two different directions, so that the movement track of the movable block relative to the product is consistent with the demolding direction of the second inverted buckle, and smooth demolding is realized. A core pulling structure is replaced, forming and smooth demolding of inverted buckle structures which face different directions and are related in structure are achieved, meanwhile, the mold design is simplified, and the mold cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a demoulding mechanism for a heterogeneous undercut structure. Background Art

[0002] For the undercut structure on the product, demoulding is usually done by tilting the top or pulling the core.

[0003] like Figure 1 The structure of the product 100 shown has a first undercut 101, and a second undercut 102 at the bottom of the first undercut 101. The two undercuts are oriented in different directions, and their positions are related.

[0004] If the inclined ejection method is adopted, both demoulding cannot be performed at the same time. If the inclined ejection and core pulling method are combined, due to the structural limitations of the product, the space in the mold is insufficient, and it is difficult to install the components of the core pulling mechanism. In addition, there are multiple second undercuts 102 on the product 100, making the core pulling structure difficult to implement.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0006] In view of the above-mentioned defects, the present invention mainly provides a demoulding mechanism for undercut structures with different directions, so as to solve the demoulding technical problem of undercut structures with different directions and related structures.

[0007] In order to solve the above problems, the present invention provides a demoulding mechanism for a heterogeneous undercut structure, comprising a movable mold, on which a separable inclined ejector block is provided; on which a movable block capable of linear sliding is provided; on which a linkage rail is provided, and on which a linkage groove slidably matched with the linkage rail is provided;

[0008] A movable platen is provided on one side of the movable mold, and a push plate that can move back and forth is also provided between the movable platen and the movable mold; the inclined ejector block is fixedly connected to an inclined ejector rod; the inclined ejector rod is movably connected to the movable mold and the push plate in sequence.

[0009] According to the demoulding mechanism for the heterogeneous undercut structure of the present invention, a slide rail is fixedly arranged on the movable mold, and a rail groove which is sleeved and matched with the slide rail is opened on the movable block.

[0010] According to the demoulding mechanism for the heterogeneous undercut structure of the present invention, the cross-sectional shape of the slide rail is T-shaped.

[0011] According to the demoulding mechanism for the asymmetrical undercut structure of the present invention, a makeshift space for accommodating the movable block is provided at the bottom of the inclined top block; the rail groove is arranged at the center position of the bottom of the movable block; a linkage rail is arranged on each side of the movable block, and the two linkage rails are symmetrically distributed on both sides of the rail groove.

[0012] According to the demoulding mechanism for the heterogeneous undercut structure of the present invention, a guide surface opened outward is provided at the notch position of the linkage groove.

[0013] According to the demoulding mechanism for the anisotropic undercut structure of the present invention, a limiting column located below the movable block is fixedly arranged on the movable mold; a retractable limiting block is arranged on the top of the limiting column; and a limiting groove having a shape matching that of the limiting block is correspondingly arranged on the bottom of the movable block.

[0014] According to the demoulding mechanism for the heterogeneous undercut structure of the present invention, the cross-sectional shape of the limiting block is an isosceles triangle.

[0015] According to the demoulding mechanism for the heterogeneous undercut structure of the present invention, the inclined ejector rod is a hollow rod, and the lower end of the inclined ejector rod is connected to the water nozzle.

[0016] According to the demoulding mechanism for the heterogeneous undercut structure of the present invention, an auxiliary rod is provided in parallel adjacent to the inclined ejector rod; a reinforcing plate is fixed on the movable mold; and the inclined ejector rod and the auxiliary rod are both slidably connected to the reinforcing plate.

[0017] According to the demoulding mechanism for the asymmetrical undercut structure of the present invention, two oppositely arranged slide plates are fixed in the push plate, and guide grooves are provided on the inner walls of the slide plates; a guide block slidably matched with the guide grooves is sandwiched between the two slide plates; the guide block slidably penetrates the inclined ejector rod and the auxiliary rod.

[0018] In summary, the present invention provides a movable block linked to the lift block on the movable mold; the lift block forms the first undercut structure of the product, and the movable block forms the second undercut structure of the product. When the mold is opened, the movable block is constrained in two different directions, so that its movement trajectory relative to the product is consistent with the demolding direction of the second undercut, thereby achieving smooth demolding. The core-pulling structure is replaced to achieve the molding and smooth demolding of undercut structures with different directions and related structures, while simplifying the mold design and reducing the mold cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the product of the present invention;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the demoulding mechanism of the present invention;

[0021] Figure 3 yes Figure 2 The structural diagram of the middle part of the area;

[0022] Figure 4 It is a schematic diagram of the structure of the movable block of the present invention;

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle limit column;

[0024] Figure 6 It is a structural schematic diagram of the matching mode between the movable block and the inclined ejector block of the present invention;

[0025] Figure 7 yes Figure 3 Schematic diagram of the cross-section structure of the middle area;

[0026] In the figure: 1-movable mold, 11-movable mold plate, 12-push plate; 2-inclined ejector block, 21-inclined ejector rod, 22-auxiliary rod, 23-slide plate, 231-guide groove, 232-guide block; 24-reinforcement plate, 25-linkage groove, 251-introduction surface; 26-water nozzle; 3-live block, 31-linkage rail, 32-rail groove; 4-slide rail, 5-limiting column, 51-limiting block, 511-guide surface, 52-reset spring; 100-product, 101-first undercut, 102-second undercut. DETAILED DESCRIPTION

[0027] See also Figure 2 The present invention provides a demoulding mechanism for a heterogeneous undercut structure, comprising a movable mold 1, on which a detachable inclined ejector block 2 is provided; see Figure 3 The movable mold 1 is provided with a movable block 3 capable of linear sliding; Figure 6 The movable block 3 is provided with a linkage rail 31, and the inclined top block 2 is provided with a linkage groove 25 that slides with the linkage rail 31;

[0028] A movable platen 11 is provided on one side of the movable mold 1, and a reciprocating push plate 12 is provided between the movable platen 11 and the movable mold 1; the inclined ejector block 2 is fixedly connected to an inclined ejector rod 21; the inclined ejector rod 21 is movably connected to the movable mold 1 and the push plate 12 in sequence;

[0029] See also Figure 4 As an embodiment, a slide rail 4 is fixed on the movable mold 1, and a rail groove 32 for sleeve-fitting with the slide rail 4 is opened on the movable block 3; further, the cross-sectional shape of the slide rail 4 is T-shaped, forming a stable and precise sliding fit with the movable block 3.

[0030] The inclined ejector block 2 of the present invention is used to form a first undercut 101 structure of the product 100 , and the movable block 3 is used to form a second undercut 102 structure of the product 100 .

[0031] When the mold is opened, the inclined ejector block 2 moves, and the linkage groove 25 generates a driving force on the linkage rail 31 to push the movable block 3 to move and slide along the linkage rail 31.

[0032] The linkage rail 31 and the slide rail 4 jointly limit the movement trajectory of the movable block 3 relative to the product 100. The present invention sets the angle between the linkage rail 31 and the slide rail 4 according to the demoulding direction of the second undercut 102, so that the movement trajectory of the movable block 3 relative to the product 100 is consistent with the demoulding direction of the second undercut 102, thereby achieving smooth demoulding.

[0033] After the movable block 3 is separated from the second undercut 102, the inclined top block 2 continues to move until it is separated from the first undercut 101, and then the product 100 is removed to complete a production cycle.

[0034] When the mold is closed, the linkage groove 25 of the inclined ejector block 2 is matched with the linkage rail 31 again, and drives the movable block 3 to slide along the linkage rail 31 until it returns to its original position, preparing for the molding of the next mold product 100.

[0035] Furthermore, the linkage groove 25 is provided with an outwardly opened introduction surface 251 at the groove opening; when the mold is closed, the introduction surface 251 first contacts the linkage rail 31 so that the linkage rail 31 can smoothly enter the linkage groove 25 .

[0036] As an embodiment, a space for accommodating the movable block 3 is provided at the bottom of the inclined top block 2; the rail groove 32 is arranged at the center of the bottom of the movable block 3; a linkage rail 31 is arranged on both sides of the movable block 3, and the two linkage rails 31 are symmetrically distributed on both sides of the rail groove 32; and a linkage groove 25 cooperating with the linkage rail 31 is correspondingly provided on the inclined top block 2;

[0037] When the mold is opened, the movable block 3 is subjected to a balanced driving force, is not prone to getting stuck, and can move smoothly.

[0038] See also Figure 5 In order to prevent the movable block 3 from being disturbed by the outside world and being offset, so as to prevent the inclined ejector block 2 from colliding with the movable block 3 when it is reset, the movable mold 1 is further provided with a limit column 5 located below the movable block 3; a retractable limit block 51 is provided on the top of the limit column 5; and a limit groove whose shape matches the limit block 51 is provided at the bottom of the movable block 3.

[0039] Optionally, a receiving groove is provided in the limiting column 5, and the limiting block 51 is located in the receiving groove; a return spring 52 is further provided between the bottom surface of the receiving groove and the limiting block 51;

[0040] When the movable block 3 moves, the extrusion limit block 51 is retracted into the limit column 5. When the movable block 3 moves to a predetermined position, such as the position when the movable block 3 is separated from the second undercut 102, the limit column 5 pops out into the limit groove to limit the sliding of the movable block 3 on the movable mold 1.

[0041] Optionally, each limiting column 5 corresponds to two groups of limiting grooves; the two groups of limiting grooves correspond to two extreme positions of the movable block 3, that is, when the mold is opened, the movable block 3 is separated from the second undercut 102; and when the mold is closed, the movable block 3 and the inclined ejector block 2 are reset and matched.

[0042] Preferably, the cross-sectional shape of the limit block 51 is an isosceles triangle with two symmetrical guide surfaces 511; after being matched with the limit groove, the movable block 3 is in a stable state. When the movable block 3 moves, the inner wall of the limit groove presses the guide surface 511, so that the limit block 51 is retracted, and the resistance to the separation of the two is small.

[0043] Combination Figure 7 As an embodiment, the inclined ejector rod 21 is a hollow rod, and the lower end of the inclined ejector rod 21 is connected to a water nozzle 26; cooling water is supplied through the water nozzle 26 to cool the inclined ejector block 2.

[0044] As an embodiment, the present invention has a large angle of inclined ejection. To enhance stability, an auxiliary rod 22 is provided in parallel adjacent to the inclined ejector rod 21; a reinforcing plate 24 is fixed on the movable mold 1; the inclined ejector rod 21 and the auxiliary rod 22 are both slidably connected to the reinforcing plate 24; the auxiliary rod 22 shares the force, so that the inclined ejector block 2 is ejected smoothly. The lower end of the auxiliary rod 22 is also slidably disposed on the movable mold plate 11.

[0045] As an embodiment, two oppositely arranged slide plates 23 are fixed in the push plate 12, and a guide groove 231 is provided on the inner wall of the slide plate 23; a guide block 232 slidably matched with the guide groove 231 is sandwiched between the two slide plates 23; the guide block 232 slidably penetrates the inclined ejector rod 21 and the auxiliary rod 22;

[0046] The guide groove 231 is inclined. When the mold is opened, as the inclined ejector block 2 is ejected, the guide block 232 slides along the guide groove 231 to compensate for the horizontal and vertical displacements of the inclined ejector rod 21 and the auxiliary rod 22. At the same time, the guide groove 231 constrains the guide block 232, providing partial thrust for the inclined ejector rod 21 and the auxiliary rod 22, thereby promoting the ejection of the inclined ejector block 2.

[0047] In summary, the present invention provides a demoulding mechanism for a heterogeneous undercut structure, by arranging a movable block linked with an inclined ejector block on the movable mold; the inclined ejector block forms the first undercut structure of the product, and the movable block forms the second undercut structure of the product. When the mold is opened, the movable block is constrained in two different directions, so that its movement trajectory relative to the product is consistent with the demoulding direction of the second undercut, thereby achieving smooth demoulding. By replacing the core-pulling structure, the molding and smooth demoulding of undercut structures with different directions and related structures are achieved, while simplifying the mold design and reducing the mold cost.

[0048] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A demoulding mechanism for a heterogeneous undercut structure, characterized in that: The movable mold comprises a movable mold, on which a detachable inclined ejector block is arranged; the movable mold is provided with a movable block capable of linear sliding; the movable block is provided with a linkage rail, and the inclined ejector block is provided with a linkage groove that slides with the linkage rail; A movable platen is provided on one side of the movable mold, and a push plate that can move back and forth is also provided between the movable platen and the movable mold; the inclined ejector block is fixedly connected to an inclined ejector rod; the inclined ejector rod is movably connected to the movable mold and the push plate in sequence.

2. The demoulding mechanism for the heterogeneous undercut structure according to claim 1, characterized in that: The movable mold is fixed with a slide rail, and the movable block is provided with a rail groove which is sleeved and matched with the slide rail.

3. The demoulding mechanism for the heterogeneous undercut structure according to claim 2, characterized in that: The cross-section of the slide rail is T-shaped.

4. The demoulding mechanism for the heterogeneous undercut structure according to claim 2, characterized in that: The bottom of the inclined top block is provided with a makeshift space for accommodating the movable block; the rail groove is arranged at the center position of the bottom of the movable block; a linkage rail is arranged on both sides of the movable block, and the two linkage rails are symmetrically distributed on both sides of the rail groove.

5. The demoulding mechanism for the heterogeneous undercut structure according to claim 1, characterized in that: The notch position of the linkage groove is provided with a guide surface opened outward.

6. The demoulding mechanism for the heterogeneous undercut structure according to claim 1, characterized in that: The movable mold is also fixed with a limiting column located below the movable block; a retractable limiting block is provided on the top of the limiting column; and a limiting groove whose shape matches the limiting block is correspondingly provided at the bottom of the movable block.

7. The demoulding mechanism for the heterogeneous undercut structure according to claim 6, characterized in that: The cross-sectional shape of the limiting block is an isosceles triangle.

8. The demoulding mechanism for a heterogeneous undercut structure according to any one of claims 1 to 7, characterized in that: The inclined top rod is a hollow rod, and the lower end of the inclined top rod is connected to the water nozzle.

9. The demoulding mechanism for the heterogeneous undercut structure according to claim 8, characterized in that: An auxiliary rod is also arranged in parallel adjacent to the inclined ejector rod; a reinforcing plate is fixed on the movable mold; and both the inclined ejector rod and the auxiliary rod are slidably connected to the reinforcing plate.

10. The demoulding mechanism for the heterogeneous undercut structure according to claim 9, characterized in that: Two oppositely arranged slide plates are fixed in the push plate, and guide grooves are arranged on the inner walls of the slide plates; a guide block slidably matched with the guide grooves is sandwiched between the two slide plates; the guide block slidably penetrates the inclined ejector rod and the auxiliary rod.

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