CN216914739U

CN216914739U - Bullet piece structure and flip-chip double-color injection mold

Info

Publication number: CN216914739U
Application number: CN202123041102.2U
Authority: CN
Inventors: 何叶春; 石波; 沈亮涵
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-07-08
Anticipated expiration: 2031-12-03

Abstract

The utility model provides an elastic block structure and an inverted double-color injection mold. The spring block structure is used for inversely installing a double-color injection mold, the inversely installing double-color injection mold comprises a movable mold, a cavity group is arranged on the movable mold, and the spring block structure comprises a spring block body, a core-pulling assembly and a guide block; the elastic block body is elastically connected to the movable die, and a back-off pressing block extends from one side, close to the cavity group, of the elastic block body; the core pulling assembly is connected to the movable die so as to lock the elastic block body when the movable die moves; the guide block is connected to the movable die and is in sliding connection with the elastic block body so as to guide the elastic block body to move towards the position of the cavity group. This bullet piece structure utilizes the subassembly of loosing core to carry on spacingly to the bullet piece body, has realized that the back-off briquetting is pressed the product and is not demolded in the die cavity group after the first time moulds plastics, and the action order requirement of demold again after the second time is moulded plastics and is accomplished.

Description

Bullet piece structure and flip-chip double-color injection mold

Technical Field

The utility model relates to the technical field of double-color injection molding, in particular to an elastic block structure and an inverted double-color injection mold.

Background

The flip-chip double-color injection mold of the prior art has the first die cavity and the second die cavity that form the double-color product by injection molding respectively on the mold usually when moulding plastics, and the product is located the first die cavity of mold, relies on at product border an organic whole to form mounting structure, and these mounting structure fix the product in first die cavity, can prevent that the product from leading to the product to leave type in first die cavity because of the shrink after the product is moulded plastics in first die cavity.

If the skin of product is white transparent, the inlayer is bright for black, fretwork finished product tablet LOGO shape in the middle of the inlayer, need open when daily use, or because of the matching space restriction, lead to the border of product can not arrange mounting structure, the double-colored injection mold of flip-chip of prior art then has following defect: the black part of the double-color product in the first cavity is released due to the self shrinkage of the product during injection molding, so that the double-color product in the second cavity is cracked; the white part of product is in the regional gluey face of sealing as the black part of LOGO, and position accuracy requires highly to the product in the first die cavity of mould can not be beaten too plump, and injection pressure needs to reduce, leads to first station to increase from the probability that the type problem produced, and the manufacturing cost that moulds plastics increases.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an elastic block structure, which utilizes a core-pulling assembly to limit an elastic block body, so that the action sequence requirements that after the first injection molding, a product is pressed in a cavity group by a back-off pressing block without demoulding, and after the second injection molding is finished, the product is demoulded are met.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

according to one aspect of the utility model, the spring block structure is used for inversely installing a double-color injection mold, the inversely installing double-color injection mold comprises a movable mold, a cavity group is arranged on the movable mold, and the spring block structure comprises a spring block body, a core pulling assembly and a guide block; the elastic block body is elastically connected to the movable die, and a back-off pressing block extends from one side, close to the cavity group, of the elastic block body; the core pulling assembly is connected to the movable die so as to lock the elastic block body when the movable die moves; the guide block is connected to the movable die and is in sliding connection with the elastic block body so as to guide the elastic block body to move towards the position of the cavity group.

According to an embodiment of the present invention, the spring block structure further includes an elastic member connected between the movable die and the spring block body.

According to an embodiment of the present invention, the elastic member includes a fixing screw and a spring sleeved on the fixing screw, a tail end of the fixing screw is connected to the movable mold, and a large end of the fixing screw is engaged with the elastic block body to prevent the elastic block body from falling.

According to an embodiment of the present invention, the spring block body is provided with a stepped hole, and the large head end of the fixing screw is disposed in the stepped hole.

According to an embodiment of the present invention, the core pulling assembly includes a core pulling main body and an oil cylinder, a cylinder body of the oil cylinder is connected to the movable mold, and the core pulling main body is connected to a cylinder rod of the oil cylinder.

According to an embodiment of the present invention, the core pulling assembly further includes a limiting block, the limiting block is disposed at an end of the core pulling main body away from the cylinder rod, the spring block body is provided with a groove, and the limiting block is inserted into the groove.

According to an embodiment of the present invention, a side wall of the guide block close to the elastic block body is a first inclined surface, and the elastic block body is provided with a second inclined surface in sliding fit with the first inclined surface.

According to an embodiment of the present invention, the spring block structure further includes a convex guide plate and a concave guide groove slidably fitted with the convex guide plate, the convex guide plate is connected to the first inclined surface, and the concave guide groove is opened at the second inclined surface.

According to another aspect of the present invention, a flip-chip two-shot injection mold is provided. The flip double-color injection mold comprises the elastic block structure, a movable mold and a fixed mold; the bottom of the movable die is provided with a cavity group; the fixed die is abutted to the movable die, and a die core group is arranged on one side, close to the movable die, of the fixed die.

According to an embodiment of the present invention, the cavity group includes a first cavity and a second cavity symmetrically disposed about a rotation axis of the movable mold, the core group includes a first core and a second core for twice mold closing, and the four elastic block structures are disposed on two sides of the first cavity and the second cavity, respectively.

One embodiment of the present invention has the following advantages or benefits:

the elastic block structure comprises an elastic block body, a core pulling assembly and a guide block, wherein the core pulling assembly is used for limiting the elastic block body, so that the requirements of pressing a product in a cavity group by a back-off pressing block after first injection molding without demoulding are met, and the action sequence of demoulding after second injection molding is finished are met, so that the release problem of the product caused by self shrinkage after first mould opening and the cracking problem of the product after second mould opening are solved, the injection pressure maintaining pressure of the first injection molding is reduced, the problem that the appearance surface is crushed after the second injection molding is solved, and the product perception quality and the customer satisfaction are improved.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a perspective view of a bullet block structure shown in accordance with an exemplary embodiment.

Fig. 2 is an exploded view of a bullet block structure shown according to an exemplary embodiment.

Fig. 3 is an illustration of an overlapping configuration of a bullet block and a product, according to an exemplary embodiment.

FIG. 4 is a perspective view of a flip-chip two-shot injection mold according to an exemplary embodiment.

Fig. 5 is a schematic diagram illustrating a first opening of a flip-chip two-color injection mold according to an exemplary embodiment.

FIG. 6 is a schematic diagram illustrating a second opening of a flip-chip two-color injection mold according to an exemplary embodiment.

Wherein the reference numerals are as follows:

1. a bullet block body; 11. reversely buckling and pressing a block; 12. a stepped hole; 13. a groove; 14. a second inclined surface; 2. A core pulling assembly; 21. a core-pulling main body; 22. an oil cylinder; 23. a limiting block; 3. a guide block; 31. a first inclined plane; 4. an elastic member; 41. fixing screws; 42. a spring; 5. a convex guide plate; 6. a concave guide groove; 7. moving the mold; 71. a cavity group; 711. a first cavity; 712. a second cavity; 8. fixing a mold; 81. Forming a core group; 811. a first core; 812. a second core; 9. and (5) producing the product.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

As shown in fig. 1 to 3, fig. 1 is a perspective view illustrating a bullet block structure provided by the present invention. Fig. 2 shows an exploded view of a bullet block structure provided by the present invention. Figure 3 shows a lap joint view of a bullet block structure and a product 9 provided by the present invention. Fig. 4 shows a perspective view of an inverted two-color injection mold provided by the utility model. Fig. 5 shows a schematic diagram of the first opening of an inverted two-color injection mold provided by the utility model. Fig. 6 shows a schematic diagram of the second opening of the inverted two-color injection mold provided by the utility model.

The spring block structure is used for an inverted double-color injection mold, the inverted double-color injection mold comprises a movable mold 7, a cavity group 71 is arranged on the movable mold 7, and the spring block structure comprises a spring block body 1, a core-pulling assembly 2 and a guide block 3; the elastic block body 1 is elastically connected to the movable die 7, and a back-off pressing block 11 extends from one side of the elastic block body 1 close to the cavity group 71; the core-pulling assembly 2 is connected to the movable mold 7 so as to lock the elastic block body 1 when the movable mold 7 moves at a first station; the guide block 3 is connected to the movable die 7 and slidably connected to the spring block body 1 to guide the spring block body 1 to move to the position of the cavity group 71.

Wherein, the movable mould 7 moves downwards to abut against the fixed mould 8, the guide block 3 is connected on the movable mould 7, the elastic block body 1 moves upwards along the guide block 3 to be close to the fixed mould 8 and move towards the cavity group 71, the first cavity 711 of the cavity group 71 and the first core 811 of the core group 81 are matched to form a core injection molding cavity, after the first mould closing, the core part of the product 9 is injection molded in the core injection molding cavity, the product 9 is clamped in the first cavity 711 due to the matching of the back-off press block 11 and the movable mould 7, after the first mould opening, the movable mould 7 rotates to drive the product 9 to rotate together, after the first cavity 711 and the second core 812 are aligned, the movable mould 7 presses downwards to carry out the second mould closing, the first cavity 711 and the second core 812 are matched to form a shell injection molding cavity, after the shell part of the product 9 is injection molded in the shell injection molding cavity, before the mould opening, the core-pulling component 2 leaves the elastic block body 1 to release the locking, due to the elastic action, the elastic block body 1 retreats away from the cavity group 71 while withdrawing along the guide block 3, then the back-off pressing block 11 does not press the product 9 any more, the product 9 is left in the second core 812 after the die is opened, and the product 9 is ejected by the ejection piece in the fixed die 8 to complete the whole double-color injection molding process.

In a preferred embodiment of the present invention, the spring block structure further includes an elastic member 4, and the elastic member 4 is connected between the movable mold 7 and the spring block body 1.

As shown in fig. 1 to 3, the elastic block body 1 is connected to the movable die 7 through the elastic component 4, when the movable die 7 and the fixed die 8 are assembled, the fixed die 8 presses the elastic block body 1 to the movable die 7, and then the elastic component 4 is compressed to enable the elastic component 4 to have elastic potential energy, the core pulling component 2 locks the elastic block body 1, after the second injection molding is finished, the abutting joint of the core pulling component 2 and the elastic block body 1 is removed, after the movable die 7 is lifted away from the fixed die 8, the elastic potential energy of the elastic component 4 is released to enable the elastic block body 1 to be separated from the abutting joint with the movable die 7, and then the product 9 is loosened, and the product 9 is left in the second core 812.

In a preferred embodiment of the present invention, the elastic member 4 includes a fixing screw 41 and a spring 42 sleeved on the fixing screw 41, a tail end of the fixing screw 41 is connected to the movable mold 7, and a large end is clamped to the elastic block body 1 to prevent the elastic block body 1 from falling. The bullet block body 1 is provided with a stepped hole 12, and the big head end of the guide post 41 is arranged in the stepped hole 12.

As shown in fig. 1 to 3, the middle part of the stepped hole 12 is provided with a step-shaped structure, the top end of the spring 42 abuts against the movable mold 7, the bottom end of the spring is clamped above the step-shaped structure, when the fixing screw 41 passes through the stepped hole 12 from bottom to top, the big end of the fixing screw 41 can be clamped in the stepped hole 12, the tail end of the fixing screw 41 passes through the spring 42 and then is connected to the movable mold 7 in a threaded manner, so that a certain mobility can be reserved for the elastic block body 1, and the elastic block body 1 can be ensured not to fall off from the movable mold 7.

Preferably, two stepped holes 12 are formed in the block body at intervals, and a pair of elastic members 4 are respectively formed in the two stepped holes 12 to increase stability in ascending or descending of the block body.

In a preferred embodiment of the present invention, the core back assembly 2 includes a core back main body 21 and an oil cylinder 22, a cylinder body of the oil cylinder 22 is connected to the movable mold 7, and the core back main body 21 is connected to a cylinder rod of the oil cylinder 22.

As shown in fig. 1 to 6, the cylinder body of the oil cylinder 22 is fixedly connected to the movable mold 7 to provide a supporting point for the movement of the core pulling main body 21, the cylinder rod slides in the cylinder body to extend out, and then the core pulling main body 21 is driven to move towards the elastic block body 1, so that the elastic block body 1 is locked, and after the second injection molding is completed, the cylinder rod retracts to drive the core pulling main body 21 to be away from the elastic block body 1, so that the product 9 can be left in the second mold core 812.

In a preferred embodiment of the present invention, the core pulling assembly 2 further includes a limiting block 23, the limiting block 23 is disposed at one end of the core pulling main body 21 away from the cylinder rod, the elastic block body 1 is provided with a groove 13, and the limiting block 23 is inserted into the groove 13.

As shown in fig. 1 to 3, the lateral wall that the cavity group 71 was kept away from to the bullet piece body 1 is provided with recess 13, recess 13 meets with stopper 23 is unsmooth, when movable mould 7 and cover half 8 compound die, bullet piece body 1 and cover half 8 butt, make elastomeric element 4 compressed, bullet piece body 1 passive back that targets in place this moment, the main part of loosing core 21 moves to bullet piece body 1, make stopper 23 insert in the recess 13, accomplish the locking and spacing to bullet piece body 1, guarantee that bullet piece body 1 all is here centre gripping product 9 at every turn, and then improve the uniformity of product 9.

In a preferred embodiment of the present invention, the side wall of the guide block 3 close to the bullet block body 1 is a first inclined surface 31, and the bullet block body 1 is provided with a second inclined surface 14 which is matched with the first inclined surface 31 in a sliding manner.

As shown in fig. 1 to 3, the top end of the first inclined surface 31 is closer to the cavity group 71 than the bottom end, and the top end of the second inclined surface 14 is closer to the cavity group 71 than the bottom end, so that the first inclined surface 31 and the second inclined surface 14 are tightly attached to each other, when the core pulling assembly 2 is pulled out, due to the action of the elastic component 4, the elastic block body 1 retreats simultaneously in the downward moving process, and the product 9 can be released, so that the product 9 is left on the fixed mold 8 and ejected by the ejecting member on the fixed mold 8, and injection molding is completed.

In a preferred embodiment of the present invention, the bullet structure further comprises a convex guide plate 5 and a concave guide slot 6 slidably fitted with the convex guide plate 5, the convex guide plate 5 is connected to the first inclined surface 31, and the concave guide slot 6 is opened on the second inclined surface 14.

As shown in fig. 1 to 3, the concave guide groove 6 is in concave-convex contact with the convex guide plate 5, and limits the relative position between the first inclined surface 31 and the second inclined surface 14, so that the first inclined surface 31 slides up and down along the second inclined surface 14 all the time, the relative displacement of the first inclined surface 31 and the second inclined surface 14 in the front-back direction is maintained, and the moving precision of the projectile block body 1 is further ensured.

Preferably, the convex guide plate 5 is integrally formed on the guide block 3 to increase the coupling strength of the two.

The elastic block structure comprises an elastic block body 1, a core-pulling assembly 2 and a guide block 3, wherein the core-pulling assembly 2 is used for limiting the elastic block body 1, so that the requirement of action sequence that a product 9 is pressed in a cavity group 71 by an inverted buckle pressing block 11 after first injection molding and is not demoulded, and demoulding is carried out after second injection molding is finished is met, the release problem of the product 9 caused by self contraction after first mould opening and the cracking problem after second mould opening are solved, the injection molding pressure maintaining pressure of the first injection molding is reduced, the problem that the appearance surface is crushed after the second injection molding is solved, and the perception quality of the product 9 and the customer satisfaction are improved. The elastic block has good structural stability, and the injection molding qualification rate can be stabilized at 95%.

The flip double-color injection mold comprises the elastic block structure, a movable mold 7 and a fixed mold 8; the bottom of the movable mold 7 is provided with a cavity group 71; the fixed die 8 is abutted to the movable die 7, and a die core group 81 is arranged on one side of the fixed die 8 close to the movable die 7. The cavity group 71 includes a first cavity 711 and a second cavity 712 symmetrically disposed about the rotational axis of the movable mold 7, the core group 81 includes a first core 811 and a second core 812 for double mold closing, respectively, and four spring block structures are disposed on both sides of the first cavity 711 and the second cavity 712, respectively.

As shown in fig. 4 to 6, the movable mold 7 moves downwards to abut against the fixed mold 8, the guide block 3 is connected to the movable mold 7, the elastic block body 1 moves upwards along the guide block 3 to approach the fixed mold 8 and move towards the cavity group 71, the first cavity 711 and the first core 811 cooperate to form a core injection molding cavity, after first mold closing, after the core part of the product 9 is injection molded in the core injection molding cavity, the product 9 is clamped in the first cavity 711 due to the cooperation of the back-off press block 11 and the movable mold 7, after first mold opening, the movable mold 7 rotates with the product 9, after the first cavity 711 and the second core 812 are aligned, the movable mold 7 is pressed downwards to perform second mold closing, the first cavity 711 and the second core 812 cooperate to form a shell injection molding cavity, after the shell part of the product 9 is injection molded in the shell injection molding cavity, before mold opening, the core pulling assembly 2 leaves the elastic block body 1 to release the locking, due to the elastic action, the elastic block body 1 retreats away from the cavity group 71 while withdrawing along the guide block 3, then the back-off pressing block 11 does not press the product 9 any more, the product 9 is left in the second core 812 after the die is opened, and the product 9 is ejected by the ejection piece in the fixed die 8 to complete the whole double-color injection molding process. And the first cavity 711 and the second cavity 712 are arranged in central symmetry with the rotating shaft of the movable mold 7 as a central axis, and are both used for being matched with the first core 811 to form an inner core injection molding cavity, so that when the second injection molding of the first product 9 is performed, the first injection molding of the next product 9 can be completed at the same time, and the production cycle can be improved.

The flip double-color injection mold comprises an elastic block structure, a movable mold 7 and a fixed mold 8. The elastic block structure is installed on the movable die 7, the elastic block body 1 is limited by the core pulling assembly 2, the situation that the product 9 is pressed in the cavity group 71 by the back-off pressing block 11 after the first injection molding without demolding is realized, the action sequence requirement of demolding after the second injection molding is finished is met, the problems of parting of the product 9 after the first mold opening and cracking of the product after the second mold opening due to self shrinkage are solved, the injection molding pressure maintaining pressure of the first injection molding is reduced, the problem that the appearance surface is crushed after the second injection molding is solved, and further the perception quality and the customer satisfaction of the product 9 are improved.

In embodiments of the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention.

In the description herein, the appearances of the phrase "one embodiment," "a preferred embodiment," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. The utility model provides a bullet piece structure for flip-chip double-shot injection mold, flip-chip double-shot injection mold includes movable mould (7), be provided with die cavity group (71) on movable mould (7), its characterized in that includes:

the elastic block body (1) is elastically connected to the movable die (7), and a back-off pressing block (11) extends from one side, close to the cavity group (71), of the elastic block body (1);

the core-pulling assembly (2) is connected to the movable die (7) so as to lock the elastic block body (1) when the movable die (7) moves; and

the guide block (3) is connected to the movable die (7) and is in sliding connection with the elastic block body (1) so as to guide the elastic block body (1) to move to the position of the cavity group (71).

2. The bullet structure of claim 1 further comprising an elastic member (4), said elastic member (4) being connected between said movable die (7) and said bullet body (1).

3. The spring block structure according to claim 2, wherein the elastic member (4) comprises a fixing screw (41) and a spring (42) sleeved on the fixing screw (41), the tail end of the fixing screw (41) is connected to the movable die (7), and the large end is clamped to the spring block body (1) to prevent the spring block body (1) from falling.

4. A block magazine as claimed in claim 3, characterized in that the block magazine body (1) is provided with a stepped hole (12), and the big end of the fixing screw (41) is disposed in the stepped hole (12).

5. The spring block structure according to claim 1, wherein the core pulling assembly (2) comprises a core pulling main body (21) and an oil cylinder (22), a cylinder body of the oil cylinder (22) is connected to the movable die (7), and the core pulling main body (21) is connected to a cylinder rod of the oil cylinder (22).

6. The spring block structure according to claim 5, wherein the core pulling assembly (2) further comprises a limiting block (23), the limiting block (23) is arranged at one end, away from the cylinder rod, of the core pulling main body (21), the spring block body (1) is provided with a groove (13), and the limiting block (23) is inserted into the groove (13).

7. A block magazine as claimed in claim 1, characterized in that the side wall of the guide block (3) close to the block body (1) is a first ramp (31), the block body (1) being provided with a second ramp (14) which is a sliding fit with the first ramp (31).

8. The bullet structure of claim 7 further comprising a convex guide plate (5) and a concave guide slot (6) slidably fitted with said convex guide plate (5), said convex guide plate (5) being connected to said first ramp (31), said concave guide slot (6) opening at said second ramp (14).

9. The utility model provides a flip-chip double-colored injection mold which characterized in that includes:

the bullet block structure of any one of the preceding claims; and

the bottom of the movable die (7) is provided with a cavity group (71); and

the fixed die (8), the fixed die (8) with movable mould (7) butt, fixed die (8) are close to movable mould (7) one side is provided with die core group (81).

10. The flip-chip two-color injection mold according to claim 9, wherein the cavity group (71) comprises a first cavity (711) and a second cavity (712) which are symmetrically arranged with respect to the rotational axis of the movable mold (7), the core group (81) comprises a first core (811) and a second core (812) for double clamping, respectively, and four spring block structures are arranged on both sides of the first cavity (711) and the second cavity (712), respectively.