Inward shrinkage type core-pulling injection mold

Abstract

The invention relates to the technical field of injection molds, in particular to an internal shrinkage type core-pulling injection mold which comprises a fixed mold plate, a lower mold core and an upper mold core are arranged above the fixed mold plate, a product forming cavity is reserved between the lower mold core and the upper mold core, a demolding assembly is arranged on one side of the forming cavity, and an internal core-pulling assembly is arranged on the other side of the forming cavity. The inner core pulling assembly comprises a first fixing seat fixedly connected with the fixed mold plate, a sliding assembly is connected to the first fixing seat in a sliding mode, an inner core assembly is arranged on the side, close to the forming cavity, of the sliding assembly, and pull rods for driving the inner core assembly to be away from the forming cavity are arranged on the first fixing seat and the sliding assembly; the demolding assembly and the inner core pulling assembly are arranged on the two sides of the forming cavity, the inner core assembly of the inner core pulling assembly is driven to be separated from the forming cavity through the sliding assembly, the core pulling effect is achieved, meanwhile, the structure is simple, the production cost is reduced, meanwhile, operation is easy and convenient, and the demolding efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of injection mold support seats, and in particular relates to an inward-shrinking core-pulling injection mold. Background Art

[0002] When producing the outer shell of new energy fast charging guns, there are several undercuts in the shape of the outer shell of the fast charging gun. During the mold opening process, certain features on the product will interfere with the demolding direction. The mold must be pulled away from the product before the product is taken out. This method is called core pulling. The existing inward-retracting core-pulling injection mold requires an ejection cylinder to be set under the mold to eject the product. It has high usage requirements, the structure is not compact enough, and the production cost is too high. Therefore, it is necessary to design an inward-retracting core-pulling injection mold to solve the above problems. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an inward-retractable core-pulling injection mold to solve the problem mentioned in the above background technology that the core-pulling injection molds on the market currently use cylinder ejection with high requirements and high cost.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] An inward-retracting core-pulling injection mold comprises a fixed mold plate, a lower mold core and an upper mold core are arranged above the fixed mold plate, a molding cavity for a product is left between the lower mold core and the upper mold core, a demolding assembly is arranged on one side of the molding cavity, an inner core-pulling assembly is arranged on the other side of the molding cavity, the inner core-pulling assembly comprises a first fixed seat fixedly connected to the fixed mold plate, a sliding assembly is slidably connected to the first fixed seat, an inner core assembly is arranged on the side of the sliding assembly close to the molding cavity, and a pull rod for driving the inner core assembly away from the molding cavity is arranged on the first fixed seat and the sliding assembly.

[0006] As a further improvement of the present invention, the sliding assembly includes an active slider arranged on a side away from the forming cavity, two groups of pull rods are inserted on the active slider, and a passive slider is provided on the side of the active slider close to the forming cavity. The passive slider is connected to the active slider by a number of reset springs.

[0007] As a further improvement of the present invention, the inner core assembly includes a plurality of pull-out rods inserted into the passive slider, one end of the pull-out rod is fixedly connected to the active slider, the other end of the pull-out rod is sleeved with a clamping block, and a clamping sleeve is provided on the outside of the clamping block.

[0008] As a further improvement of the present invention, two side edges of the draw rod close to one end of the forming cavity are provided with inwardly inclined slopes, and blocks are slidably connected to the outer sides of the two slopes.

[0009] As a further improvement of the present invention, through holes are provided on both sides of the ferrule, the draw rod and the clamping block are inserted into the ferrule, and the clamping block protrudes from the through holes on a side close to the molding cavity.

[0010] As a further improvement to the present invention, the two sides of the clamping sleeve away from the end of the forming cavity are provided with clamping grooves, and the clamping block is provided with protrusions that engage with the clamping grooves.

[0011] As a further improvement of the present invention, the sliding assembly includes a second fixed seat fixedly connected to the fixed template, a pulling block is slidably connected to the second fixed seat, a connecting block is provided on the side of the pulling block close to the forming cavity, a plurality of pulling columns are provided on the connecting block, and a pull rod for driving the pulling columns away from the forming cavity is provided on the second fixed seat and the connecting block.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention arranges a demoulding assembly and an inner core pulling assembly on both sides of the molding cavity, so that the inner core assembly of the inner core pulling assembly is driven to separate from the molding cavity through the sliding assembly, thereby achieving a core pulling effect. Meanwhile, the structure is relatively simple, the production cost is reduced, and the operation is simple and convenient, which improves the demoulding efficiency.

[0014] The present invention installs the inner core component on the sliding component, drives the active sliding block to slide through the pull rod, first pulls out the draw rod, at this time the clamping block is out of the clamping state, and then connects the passive sliding block through the reset spring to further disengage from the molding cavity to finally complete the demoulding. The structure is simple and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the upper part of the fixed template of the present invention;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the inner core pulling assembly of the present invention;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the inner core component of the present invention.

[0020] The names represented by the part numbers in the above four schematic diagrams are as follows:

[0021] 1. Fixed mold plate; 2. Upper mold core; 3. Lower mold core; 4. Forming cavity;

[0022] 5. demoulding assembly; 51. second fixing seat; 52. extraction block; 53. connecting block; 54. extraction column;

[0023] 6. Inner core pulling assembly; 61. First fixed seat; 62. Sliding assembly; 621. Active slider; 622. Passive slider; 623. Return spring; 63. Pull rod;

[0024] 7. Inner core assembly; 71. Drawing rod; 72. Block; 721. Protrusion; 73. Card sleeve; 731. Through hole; 732. Card slot. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides the following embodiments:

[0027] The inward-retractable core-pulling injection mold comprises a fixed template 1, a lower mold core 3 and an upper mold core 2 are arranged above the fixed template 1, a molding cavity 4 of a product is left between the lower mold core 3 and the upper mold core 2, a demoulding component 5 is arranged on one side of the molding cavity 4, and an inner core-pulling component 6 is arranged on the other side of the molding cavity 4, the inner core-pulling component 6 comprises a first fixed seat 61 fixedly connected to the fixed template 1, a sliding component 62 is slidably connected to the first fixed seat 61, an inner core component 7 is arranged on the side of the sliding component 62 close to the molding cavity 4, and a pull rod 63 for driving the inner core component 7 away from the molding cavity 4 is arranged on the first fixed seat 61 and the sliding component 62; by arranging the demoulding component 5 and the inner core-pulling component 6 on both sides of the molding cavity 4, the inner core component 7 of the inner core-pulling component 6 is driven to separate from the molding cavity 4 by the sliding component 62, so as to achieve the effect of core-pulling, and at the same time, the structure is relatively simple, which reduces the production cost, and at the same time, the operation is simple and convenient to improve the demoulding efficiency;

[0028] The sliding assembly 62 includes an active slider 621 disposed on a side away from the molding cavity 4, two groups of pull rods 63 are inserted on the active slider 621, a passive slider 622 is disposed on the side of the active slider 621 close to the molding cavity 4, the passive slider 622 is connected to the active slider 621 via a plurality of return springs 623, the pull rod 63 drives the active slider 621 to slide in a direction away from the molding cavity 4, and after sliding for a certain distance, the return spring 623 pulls the passive slider 622 to slide in a direction away from the molding cavity 4;

[0029] The inner core assembly 7 includes a plurality of draw rods 71 ​​inserted into the passive slider 622, one end of the draw rod 71 is fixedly connected to the active slider 621, the other end of the draw rod 71 is sleeved with a block 72, a sleeve 73 is provided on the outside of the block 72, two side edges of the draw rod 71 close to one end of the molding cavity 4 are provided with inwardly inclined slopes, and the outsides of the two slopes are slidably connected with the block 72; through holes 731 are provided on both sides of the sleeve 73, the draw rod 71 and the block 72 are inserted into the sleeve 73, and the block 73 is provided on the outside of the sleeve 73. 2 protrudes from the through hole 731 on one side close to the molding cavity 4; the two sides of the clamping sleeve 73 away from the molding cavity 4 are provided with a clamping groove 732, and the clamping block 72 is provided with a protrusion 721 engaged with the clamping groove 732; by installing the inner core component 7 on the sliding component 62, the active slider 621 is driven to slide by the pull rod 63 to first pull out the draw rod 71, at this time the clamping block 72 is out of the engaged state, and then the passive slider 622 is connected by the reset spring 623 to further separate from the molding cavity 4 and finally complete the demoulding, the structure is simple and the work efficiency is improved;

[0030] The sliding assembly 62 includes a second fixed seat 51 fixedly connected to the fixed mold plate 1, a pull-out block 52 is slidably connected to the second fixed seat 51, a connecting block 53 is provided on the side of the pull-out block 52 close to the molding cavity 4, a plurality of pull-out columns 54 are provided on the connecting block 53, and a pull rod 63 is provided on the second fixed seat 51 and the connecting block 53 for driving the pull-out columns 54 away from the molding cavity 4. The pull rod 63 drives the pull-out block 52 and the connecting block 53 to move away from the molding cavity 4 to complete the demolding of the pull-out column 54.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A retractable core-pulling injection mold, comprising a fixed mold plate (1), a lower mold core (3) and an upper mold core (2) are arranged above the fixed mold plate (1), a molding cavity (4) for a product is left between the lower mold core (3) and the upper mold core (2), characterized in that A demoulding assembly (5) is provided on one side of the molding cavity (4), and an inner core pulling assembly (6) is provided on the other side of the molding cavity (4); the inner core pulling assembly (6) comprises a first fixed seat (61) fixedly connected to the fixed mold plate (1); a sliding assembly (62) is slidably connected to the first fixed seat (61); an inner core assembly (7) is provided on the side of the sliding assembly (62) close to the molding cavity (4); and a pull rod (63) is provided on the first fixed seat (61) and the sliding assembly (62) for driving the inner core assembly (7) away from the molding cavity (4).

2. The inward-shrinking core-pulling injection mold according to claim 1 is characterized in that: The sliding assembly (62) includes an active slider (621) arranged on a side away from the molding cavity (4), two groups of pull rods (63) are inserted on the active slider (621), and a passive slider (622) is arranged on the side of the active slider (621) close to the molding cavity (4), and the passive slider (622) is connected to the active slider (621) via a plurality of return springs (623).

3. The inward-retractable core-pulling injection mold according to claim 2 is characterized in that: The inner core assembly (7) comprises a plurality of draw rods (71) inserted into the passive slider (622), one end of the draw rod (71) is fixedly connected to the active slider (621), the other end of the draw rod (71) is sleeved with a clamping block (72), and a clamping sleeve (73) is provided on the outside of the clamping block (72).

4. The inward-shrinking core-pulling injection mold according to claim 3 is characterized in that: Two side edges of the draw rod (71) close to one end of the molding cavity (4) are provided with inwardly inclined slopes, and the outer sides of the two slopes are slidably connected with a clamping block (72).

5. The inward-shrinking core-pulling injection mold according to claim 4 is characterized in that: Through holes (731) are provided on both sides of the clamping sleeve (73), the draw rod (71) and the clamping block (72) are inserted into the clamping sleeve (73), and the clamping block (72) protrudes from the through holes (731) on the side close to the molding cavity (4).

6. The inward-shrinking core-pulling injection mold according to claim 5 is characterized in that: The clamping sleeve (73) is provided with clamping grooves (732) on both sides of one end away from the molding cavity (4), and the clamping block (72) is provided with protrusions (721) that are engaged with the clamping grooves (732).

7. The inward-shrinking core-pulling injection mold according to claim 6 is characterized in that: The sliding assembly (62) includes a second fixed seat (51) fixedly connected to the fixed mold plate (1), a pull-out block (52) being slidably connected to the second fixed seat (51), a connecting block (53) being provided on the side of the pull-out block (52) close to the molding cavity (4), a plurality of pull-out columns (54) being provided on the connecting block (53), and a pull rod (63) for driving the pull-out column (54) away from the molding cavity (4) being provided on the second fixed seat (51) and the connecting block (53).

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