CN210453534U - Injection mold - Google Patents

Abstract

The utility model discloses an injection mold, include: the injection molding device comprises a rear mold core, an ejection assembly, a first limiting assembly and a second limiting assembly, wherein the rear mold core is provided with an inverted-cone-shaped injection molding groove, the ejection assembly is movably arranged in the injection molding groove and is used for ejecting a product, the ejection assembly comprises an ejection rod, an ejection pipe and a movable insert, the ejection pipe is sleeved on the ejection rod, the ejection pipe comprises a first pipe and a second pipe, the movable insert is abutted against the second pipe, the outer wall of the movable insert and the outer wall of the second pipe and the inner wall of the injection molding groove define an injection molding cavity, and the injection molding cavity is used for forming the product through injection molding; the first limiting assembly and the second limiting assembly are used for limiting the first ejection and the second ejection respectively. This injection mold divides the cubic in the in-process of drawing of patterns to carry out ejecting operation, can avoid under the circumstances of guaranteeing ejecting efficiency to push through the product, excellent in use effect is favorable to improving the machining efficiency of whole circle back-off product.

Description

Injection mold

Technical Field

The utility model relates to an injection mold field especially relates to an injection mold.

Background

The injection molding processing generally needs to carry out operations such as cooling and ejection on products, the injection molding products of the whole-circle reverse buckle are complex in structure, the products are easily pushed through due to the fact that the ejection speed is too high during the ejection operation, and therefore the products are scrapped, the production efficiency is reduced due to the fact that the ejection speed is too low, and the mold stripping difficulty of the injection molding products of the whole-circle reverse buckle is large.

At present, the following modes are mostly adopted for the ejection operation of the whole circle of inverted products: firstly, two-time ejection is adopted, so that although the ejection efficiency can be improved, the product cannot be prevented from being ejected through; secondly, the ejection speed is reduced to avoid ejecting through the product, but this way can greatly reduce the processing efficiency of the product, thereby improving the production cost and being not beneficial to industrial processing.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an injection mold for solve the lower problem of whole circle back-off injection moulding product ejecting efficiency.

In order to reach one or part or whole purpose or other purposes above-mentioned, the utility model provides an injection mold is applied to the injection molding machine, include:

the rear die core is provided with an inverted conical injection molding groove;

the ejection assembly is movably arranged in the injection groove and comprises an ejection rod, an ejection pipe and a movable insert, the ejection rod and the ejection pipe are coaxially arranged with the movable insert, the ejection pipe is sleeved on the ejection rod and comprises a first pipe and a second pipe communicated with the first pipe, the movable insert is sleeved on the first pipe and abutted against the second pipe, the outer wall of the movable insert and the outer wall of the second pipe and the inner wall of the injection groove enclose an injection molding cavity, and the injection molding cavity is used for forming a product through injection molding;

the first limiting assembly can limit the movable insert when the ejection assembly moves to a first position; and

and the second limiting assembly can limit the ejection pipe when the ejection rod and the ejection pipe move to a second position.

Preferably, the ejection mechanism further comprises a moving assembly, the moving assembly comprises a first ejector plate and a second ejector plate, the first ejector plate is respectively connected to the ejection rod and a driving mechanism, and the driving mechanism is used for driving the first ejector plate to move so as to drive the ejection rod to move; the second thimble board connect in the ejector tube, just the second thimble board with pass through between the first thimble board the spacing subassembly of second is connected, before the ejector tube removes to the second position, the spacing subassembly of second respectively with first thimble board with the second thimble board is connected, in order to drive the ejector tube removes, when the ejector tube removes to the second position, the spacing subassembly of second can be right the second thimble board is spacing, thereby right the ejector tube is spacing.

Preferably, the second limiting component comprises a push rod, a buckling block and a push block, the push rod is connected to the first ejector plate, a sliding groove in sliding fit with the push rod is formed in the buckling block, a positioning groove is formed in the second ejector plate, the push block is slidably arranged in the positioning groove, a first abutting portion is arranged on the buckling block, a second abutting portion is arranged on the push block, the push block protrudes from the positioning groove and abuts against the push rod before the ejector pipe moves to the second position, and when the ejector pipe moves to the second position, the first abutting portion contacts with the second abutting portion and pushes the push block into the positioning groove completely, so that the push block is separated from the push rod.

Preferably, the first abutting portion is a first inclined surface, the first inclined surface is inclined toward the direction close to the positioning groove along the pushing direction of the push rod, and the second abutting portion is a second inclined surface parallel to the first inclined surface.

Preferably, the button machine block comprises a stop block and two side plates, the two side plates are symmetrically arranged on two opposite sides of the stop block, the stop block and the two side plates form the sliding groove in a surrounding mode, and the first inclined plane is arranged on one side, facing the push block, of the side plate.

Preferably, the second limiting assembly further comprises a spring, the spring is arranged in the positioning groove, and two ends of the spring are respectively connected with the push block and the second ejector plate.

Preferably, the fixing assembly is provided with a moving cavity, the second ejector plate is movably arranged in the moving cavity, and the fastening machine block is fixedly arranged on the fixing assembly.

Preferably, the first ejector pin plate and the second ejector pin plate are arranged in parallel, a first guide hole is formed in the second ejector pin plate, a second guide hole is formed in the fixing assembly, and the ejector rods are respectively inserted into the first guide hole and the second guide hole.

Preferably, the movable insert comprises an insert pipe and a limiting plate, the limiting plate is arranged on one side of the insert pipe, and when the ejection assembly moves to the first position, the first limiting assembly can abut against the limiting plate.

Preferably, the product is a hollow structure with an opening at one end, an inverted buckle is arranged on the inner side wall of the opening of the product, and a buckle groove capable of being matched with the inverted buckle in a clamping manner is formed in the side wall of the movable insert.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

when an injection-molded product needs to be demolded, the ejection assembly can be integrally driven to move upwards for a certain distance in the inverted-cone-shaped injection groove together with the product, so that the outer part of the product can be separated from the inverted-cone-shaped side wall of the injection groove firstly, when the product moves to a first position, the movable insert is limited by the first limiting part, the ejection rod and the ejection pipe continue to move upwards, part of the inner side of the product can be separated from the movable insert, when the ejection rod and the ejection pipe move to a second position, the ejection pipe is limited by the second limiting part, the ejection rod can continue to move upwards, so that the inner side of the product is separated from the second pipe of the ejection pipe, and at the moment, the complete separation of the product and a mold is; this device divides the cubic at the in-process of drawing of patterns to carry out ejecting operation, can avoid the top to wear the product under the condition of guaranteeing ejecting efficiency, excellent in use effect is favorable to improving the machining efficiency of whole circle back-off product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

FIG. 1 is an isometric view of the present invention;

fig. 2 is a front view of the present invention;

FIG. 3 is an enlarged view of detail A of FIG. 2;

FIG. 4 is an enlarged view of detail B of FIG. 2;

fig. 5 is a top view of the present invention;

FIG. 6 is a cross-sectional view C-C of the second ejection of FIG. 5;

FIG. 7 is an enlarged view of detail D of FIG. 6;

FIG. 8 is an enlarged view of detail E of FIG. 6;

FIG. 9 is a cross-sectional view C-C of the third ejection in FIG. 5;

FIG. 10 is a perspective view of the button block of the present invention;

in the figure:

1. a rear mold core; 101. injection molding a groove;

2. ejecting the assembly; 201. ejecting the rod; 202. ejecting a pipe; 2021. a first tube; 2022. a second tube; 203. a movable insert; 2031. an insert tube; 2032. a limiting plate; 2033. buckling grooves;

3. a first limit component;

4. a second limiting component; 401. a push rod; 402. a button machine block; 4021. a first pushing part; 4022. a sliding groove; 4023. a fixed end; 4024. a side plate; 4025. a stopper; 403. a push block; 4031. a second pushing part; 4032. a limiting notch; 404. a spacing pin; 405. a spring;

5. a moving assembly; 501. a first ejector plate; 502. a second ejector plate; 5021. a first guide hole; 5022. positioning a groove;

6. a fixing assembly; 601. a mold core base; 602. connecting blocks; 603. a fixing plate; 6031. a second guide hole;

7. producing a product; 701. and (6) reversing the process.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in figures 1-3, the utility model provides an injection mold is applied to the injection molding machine, and the injection molding machine includes cover half mechanism and movable mould mechanism, and cover half mechanism is fixed to be set up, and movable mould mechanism can remove. The injection mold comprises a mold core (not shown in the figure), an ejection assembly 2, a first limit assembly 3 and a second limit assembly 4, wherein the mold core comprises a front mold core (not shown in the figure) and a rear mold core 1, the front mold core (not shown in the figure) is connected with a fixed mold mechanism of the injection molding machine, the rear mold core 1 is connected with a movable mold mechanism of the injection molding machine, the rear mold core 1 is provided with an injection molding groove 101, the ejection component 2 is movably arranged in the injection molding groove 101, a cavity is enclosed by the front mold core (not shown) and the rear mold core 1, and the ejection end of the ejection component 2 is positioned in the cavity, the outer wall of the ejection end and the inner wall of the cavity enclose a molding cavity, liquid nylon fiber material is injected into the molding cavity from the front mold core to form a product 7, after the product 7 is cooled and molded, the movable mould mechanism drives the product 7 to be separated from the front mould core firstly, and then the product 7 can be separated from the rear mould core 1 under the ejection action of the ejection assembly 2.

Specifically, the ejection assembly 2 includes an ejection rod 201, an ejection tube 202 and a movable insert 203, the ejection rod 201 and the ejection tube 202 are both disposed coaxially with the movable insert 203, the ejection tube 202 is sleeved on the ejection rod 201, the ejection tube 202 includes a first tube 2021 and a second tube 2022 communicated with the first tube 2021, the first tube 2021 and the second tube 2022 are sequentially disposed along an ejection direction of the ejection rod 201, an outer diameter of the first tube 2021 is smaller than an outer diameter of the second tube 2022, the movable insert 203 is sleeved on the first tube 2021, an end surface of the movable insert 203 abuts against an end surface of the second tube 2022, the movable insert 203 includes an insert tube 2031 and a limit plate 2032, the limit plate 2032 is disposed on a side of the insert tube 2031 away from the second tube 2022, an outer dimension of the limit plate 2032 is larger than the outer dimension of the insert tube 2031, and an outer wall of the insert tube 2031, an outer wall of the second tube 2022 and an inner wall of the cavity form an injection molding cavity.

Further, as shown in fig. 3, the product 7 is a hollow structure with an opening at one end, an inverted buckle 701 is arranged on the inner side wall of the opening of the product 7, a buckle groove 2033 capable of being in clamping fit with the inverted buckle 701 is formed in the outer side wall of the movable mold insert 203, and after the injection molding of the product 7 is completed, the product 7 is clamped on the movable mold insert 203 through the inverted buckle 701.

As shown in fig. 6-9, the injection mold further includes a moving assembly 5, the moving assembly 5 includes a first ejector plate 501 and a second ejector plate 502, the first ejector plate 501 is connected to the ejector rod 201 and the driving mechanism respectively, the ejector rod 201 is perpendicular to the first ejector plate 501, the driving assembly drives the first ejector plate 501 to move so as to drive the ejector rod 201 to move, and the second ejector plate 502 is connected to the ejector tube 202.

It can be understood that before the ejector tube 202 moves to the second position, the second limiting assembly 4 is respectively connected with the first ejector plate 501 and the second ejector plate 502, so that the first ejector plate 501 drives the second ejector plate 502 and the first ejector plate 501 to move simultaneously in the moving process, and further drives the ejector tube 202 to move; when the ejector tube 202 is moved to the second position, the second stopper assembly 4 stops the second ejector plate 502, thereby stopping the ejector tube 202, so that the first ejector plate 501 is moved alone.

As shown in fig. 1, 6 and 9, the product 7 is subjected to three-step ejection operation by the ejection assembly 2 in sequence during demolding, in the first ejection stage of the ejection assembly 2, the first ejector plate 501 is driven by the driving mechanism to move, so as to drive the ejection rod 201 to move, when the first ejector plate 501 moves, the second ejector plate 502 is driven by the second limiting assembly 4 to move simultaneously with the first ejector plate 501, so as to drive the ejection rod 201 and the ejection tube 202 to move towards the first position, and the product 7 is driven by the ejection rod 201 and the ejection tube 202 to move simultaneously, through the cooperation of the catching groove 2033 and the back-off 701, the product 7 drives the movable insert 203 to move towards the first position, when the ejection assembly 2 moves to the first position, the first limiting assembly 3 abuts against the limiting plate 2032, so as to limit the movable insert 203, because the injection groove 101 in the shape has a mold-drawing slope, during the first ejection, the product 7 is convenient to separate from the inner side wall of the injection molding groove 101;

the second ejection phase of the ejection assembly 2 is divided into two parts, in the first part, the ejection rod 201 and the ejection tube 202 move simultaneously towards the second position, at which time the undercut 701 of the product 7 is disengaged from the undercut 2033 under the ejection action of the ejection rod 201 and the ejection tube 202; in the second portion, the ejector rod 201 and the ejector tube 202 continue to move simultaneously towards the second position until the second stop assembly 4 stops the ejector tube 202, during which part of the inner side of the product 7 is separated from the movable insert 203;

in the third ejection stage of the ejection assembly 2, the ejection pipe 202 stops moving under the limiting action of the second limiting assembly 4, the ejection rod 201 continues ejecting the product 7, in the process, the product 7 is separated from the second pipe 2022, at this time, the product 7 is completely separated from the rear mold core 1, by ejecting the product 7 three times, the phenomenon that the product 7 is pushed through by applying too large force to the product 7 in a single ejection step is avoided, and meanwhile, by ejecting three times continuously, the demolding efficiency of the product 7 can be improved on the premise of ensuring that the product 7 is not pushed through.

The second limiting assembly 4 comprises a push rod 401, a button machine block 402 and a push block 403, the push rod 401 and the ejector rod 201 are arranged in parallel, the push rod 401 is connected to the first ejector plate 501, and a sliding groove 4022 in sliding fit with the push rod 401 is formed in the button machine block 402; the second ejector pin plate 502 is provided with a positioning groove 5022, the push block 403 is slidably disposed in the positioning groove 5022, the buckle block 402 is provided with a first abutting portion 4021, the push block 403 is provided with a second abutting portion 4031, the push block 403 protrudes from the positioning groove 5022 and abuts against the push rod 401 before the ejector tube 202 moves to the second position, and the push rod 401 can push the stopper 4025 to drive the second ejector pin plate 502 and the ejector tube 202 to move when moving.

When the ejector tube 202 moves to the second position, the first abutting portion 4021 contacts with the second abutting portion 4031, the stopper 4025 moves into the positioning groove 5022 under the interaction of the first abutting portion 4021 and the second abutting portion 4031, the push block 403 can be separated from the push rod 401, the push rod 401 can continue to move in the sliding groove 4022 under the driving of the first ejector plate 501, but the push rod 401 cannot push the second ejector plate 502 through the push block 403, so that the second ejector plate 502 and the ejector tube 202 are limited. After the second ejector plate 502 and the ejector tube 202 are positioned, the ejector rod 201 may be driven by the first ejector plate 501 to move further, thereby separating the product 7 from the ejector tube 202.

Specifically, as shown in fig. 4, in this embodiment, the first abutting portion 4021 is a first inclined surface, the first inclined surface is inclined toward the direction close to the positioning groove 5022 along the pushing direction of the push rod 401, the second abutting portion 4031 is a second inclined surface, the first inclined surface is parallel to the second inclined surface, and the second inclined surface is disposed on a side of the push block 403 close to the first inclined surface. The push rod 401 pushes the push block 403 to make the first inclined surface contact with the second inclined surface, the push block 403 moves to the inside of the positioning groove 5022 under the interaction of the first inclined surface and the second inclined surface, in the moving process of the push block 403, the abutting area of the push block 403 and the push rod 401 is continuously reduced, when the ejector tube 202 reaches the second position, the push block 403 is just completely located inside the positioning groove 5022, at this time, the push block 403 is no longer abutted to the push rod 401 in the moving direction of the push rod 401, the push rod 401 cannot move the second ejector plate 502 through pushing the push block 403 at this time, therefore, the second ejector plate 502 and the ejector tube 202 are limited by the second limiting component 4, and the push rod 401 can also continue to move in the sliding groove 4022 under the driving of the first ejector plate 501.

Specifically, as shown in fig. 10, the button block 402 includes a stopper 4025 and two side plates 4024, the two side plates 4024 are symmetrically disposed on opposite sides of the stopper 4025, the two side plates 4024 are parallel to each other, the stopper 4025 and the two side plates 4024 enclose a sliding groove 4022, and a first inclined surface is disposed on a side of the side plate 4024 facing the push block 403.

Further, as shown in fig. 7, the second position-limiting assembly 4 further includes a spring 405, the spring 405 is disposed in the positioning slot 5022, and two ends of the spring 405 are respectively connected to the pushing block 403 and the second ejector plate 502, after the stopper 4025 is pushed into the positioning slot 5022, the spring 405 is compressed, and after the push rod 401 is removed from the sliding slot 4022, the spring 405 pushes the stopper 4025 to protrude from the positioning slot 5022, so as to achieve automatic return of the stopper 4025.

As shown in fig. 7, in an embodiment, the second position-limiting assembly 4 further includes a position-limiting pin 404, the position-limiting pin 404 is fixedly disposed in the positioning groove 5022, the pushing block 403 is provided with a position-limiting notch 4032 engaged with the position-limiting pin 404, and in a moving direction of the pushing block 403, a length dimension of the position-limiting notch 4032 is greater than an outer diameter dimension of the position-limiting pin 404, so that the pushing block 403 can move in the positioning groove 5022 under the position-limiting effect of the position-limiting pin 404.

Further, as shown in fig. 1, the injection mold further includes a fixing component 6, and the injection mold is connected to the moving mold mechanism of the injection molding machine through the fixing component 6, the fixing component 6 includes a mold core base 601, a fixing plate 603 and two connecting blocks 602, the two connecting blocks 602 are both disposed between the mold core base 601 and the fixing plate 603, and the two connecting blocks 602 are symmetrically disposed on two opposite sides of the mold core base 601, and the mold core base 601, the fixing plate 603 and the two connecting blocks 602 enclose a moving cavity, the second ejector plate 502 is movably disposed in the moving cavity, the button machine block 402 has a fixing end 4023, and the fixing end 4023 is fixedly connected to the fixing plate 603.

Specifically, as shown in fig. 6, a first ejector pin plate 501 and a second ejector pin plate 502 are arranged in parallel, a first guide hole 5021 is provided on the second ejector pin plate 502, a second guide hole 6031 is provided on the fixing plate 603, the ejector rod 201 is respectively inserted into the first guide hole 5021 and the second guide hole 6031, and during the moving process of the ejector rod 201, the ejector rod 201 slides stably during the ejection operation through the support of the first guide hole 5021 and the second guide hole 6031, so that the stability of the ejection operation is improved.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (10)

1. The utility model provides an injection mold, is applied to the injection molding machine which characterized in that: the method comprises the following steps:

the rear die core is provided with an inverted conical injection molding groove;

the ejection assembly is movably arranged in the injection groove and comprises an ejection rod, an ejection pipe and a movable insert, the ejection rod and the ejection pipe are coaxially arranged with the movable insert, the ejection pipe is sleeved on the ejection rod and comprises a first pipe and a second pipe communicated with the first pipe, the movable insert is sleeved on the first pipe and abutted against the second pipe, the outer wall of the movable insert and the outer wall of the second pipe and the inner wall of the injection groove enclose an injection molding cavity, and the injection molding cavity is used for forming a product through injection molding;

the first limiting assembly can limit the movable insert when the ejection assembly moves to a first position; and

and the second limiting assembly can limit the ejection pipe when the ejection rod and the ejection pipe move to a second position.

2. An injection mold according to claim 1, wherein: the ejector rod mechanism comprises an ejector rod and a driving mechanism, and is characterized by further comprising a moving assembly, wherein the moving assembly comprises a first ejector plate and a second ejector plate, the first ejector plate is respectively connected to the ejector rod and the driving mechanism, and the driving mechanism is used for driving the first ejector plate to move so as to drive the ejector rod to move; the second thimble board connect in the ejector tube, just the second thimble board with pass through between the first thimble board the spacing subassembly of second is connected, before the ejector tube removes to the second position, the spacing subassembly of second respectively with first thimble board with the second thimble board is connected, in order to drive the ejector tube removes, when the ejector tube removes to the second position, the spacing subassembly of second can be right the second thimble board is spacing, thereby right the ejector tube is spacing.

3. An injection mould according to claim 2, characterized in that: the second limiting assembly comprises a push rod, a buckling machine block and a push block, the push rod is connected to the first ejector plate, a sliding groove in sliding fit with the push rod is formed in the buckling machine block, a positioning groove is formed in the second ejector plate, the push block is slidably arranged in the positioning groove, a first abutting portion is arranged on the buckling machine block, a second abutting portion is arranged on the push block, the push block protrudes from the positioning groove and abuts against the push rod before the ejector tube moves to the second position, and when the ejector tube moves to the second position, the first abutting portion is in contact with the second abutting portion and pushes the push block into the positioning groove completely, so that the push block is separated from the push rod.

4. An injection mould according to claim 3, characterized in that: the first pushing portion is a first inclined surface, the first inclined surface inclines towards the direction close to the positioning groove along the pushing direction of the push rod, and the second pushing portion is a second inclined surface parallel to the first inclined surface.

5. An injection mould according to claim 4, characterized in that: the button machine block comprises a stop block and two side plates, the two side plates are symmetrically arranged on two opposite sides of the stop block, the stop block and the two side plates form the sliding groove in a surrounding mode, and the first inclined plane is arranged on one side, facing the push block, of the side plate.

6. An injection mold according to claim 5, wherein: the second limiting assembly further comprises a spring, the spring is arranged in the positioning groove, and two ends of the spring are respectively connected with the push block and the second ejector plate.

7. An injection mould according to claim 3, characterized in that: still including fixed subassembly, fixed subassembly is provided with and removes the chamber, the movably setting of second thimble board is in remove the intracavity, the knot machine piece is fixed to be set up fixed subassembly is last.

8. An injection mold according to claim 7, wherein: the first ejector pin plate and the second ejector pin plate are arranged in parallel, a first guide hole is formed in the second ejector pin plate, a second guide hole is formed in the fixing assembly, and the ejector rods are respectively inserted into the first guide hole and the second guide hole.

9. An injection mould according to any one of claims 1-8, characterized in that: the movable insert comprises an insert pipe and a limiting plate, the limiting plate is arranged on one side of the insert pipe, and when the ejection assembly moves to the first position, the first limiting assembly can be abutted to the limiting plate.

10. An injection mold according to claim 9, wherein: the product is a hollow structure with an opening at one end, an inverted buckle is arranged on the inner side wall of the opening of the product, and a buckle groove capable of being matched with the inverted buckle in a clamping mode is formed in the side wall of the movable insert.

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