CN217346466U

CN217346466U - Injection mold for molding multiple materials

Info

Publication number: CN217346466U
Application number: CN202220807021.4U
Authority: CN
Inventors: 张少飞; 侯巧; 曾举
Original assignee: Senjun Precision Manufacturing Shenzhen Co ltd
Current assignee: Senjun Precision Manufacturing Shenzhen Co ltd
Priority date: 2022-04-09
Filing date: 2022-04-09
Publication date: 2022-09-02
Anticipated expiration: 2032-04-09

Abstract

The application discloses an injection mold for multi-material molding, which comprises a mold blank and a movable mold core, wherein the movable mold core is in limit connection with the mold blank, at least two product cavities are arranged on the upper surface of the movable mold core, a core driving mechanism is arranged on the mold blank and connected with the movable mold core, and the core driving mechanism is used for driving the movable mold core to rotate; the demolding mechanism comprises a movable mold core, a demolding ejection mechanism and a demolding driving mechanism, wherein the demolding ejection mechanism is arranged below the movable mold core and is respectively connected with the corresponding product cavity, the demolding driving mechanism is arranged on the mold blank and can be connected with the demolding ejection mechanism, and the demolding driving mechanism is used for driving the demolding ejection mechanism to eject a product out of the product cavity. The whole movable mould plate of this application during operation need not to drive and has rotated, has reduced motion's weight to can improve the precision of control, thereby reduce the impaired risk of mould part.

Description

Injection mold for molding multiple materials

Technical Field

The application belongs to the technical field of injection molds, and more particularly relates to an injection mold for molding multiple materials.

Background

The multi-material injection molding is similar to the double-color injection molding, namely two or more than two materials are molded in one injection mold, and the multiple materials molded by the multi-material injection molding can be the same color or different colors.

Fig. 1-3 illustrate a part requiring two-material injection molding, where it is common in the prior art to produce such a part using a single mold to produce the injection molding of this type for efficiency.

The prior art mainly adopts the following modes:

1. the method comprises the steps of injection molding on a double-color injection molding machine with a movable mold turntable, namely after a first-color rubber material molding part is subjected to injection molding, opening a mold, rotating the mold or the movable mold molding part and a template by 180 degrees through the double-color injection molding machine turntable, rotating the first-color rubber material molding part product to a second-color molding position, and then closing the mold to perform second-color rubber material injection molding to produce a double-color rubber material molding part product. In such a way, the production can be carried out only on a double-color injection molding machine, so that the method cannot be applied to a common injection molding machine and is limited in application; and the double-color injection molding machine is required to be provided with a movable mold turntable, so that the production investment cost is undoubtedly increased.

2. The method is characterized in that an auxiliary injection nozzle is added on a common injection molding machine, after a main injection nozzle of the injection molding machine forms a first-color sizing material molding part, a mold is opened, then a movable mold forming part of the mold and a movable mold plate are driven to rotate 180 degrees, the first-color molding part product is rotated to a second-color forming position, then the mold is closed to perform second-color sizing material injection molding, and a double-color molding part product is produced. When the mould works in the mode, the whole movable mould plate and the formed parts need to be rotated, the moving mechanisms are more, the weight is larger, the rotating angle is difficult to control, the part collision is easy to occur, and the parts of the mould are damaged to cause loss.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the application provides an injection mold for multi-material molding, which comprises a mold blank and a movable mold core, wherein the movable mold core is in limit connection with the mold blank, at least two product cavities are arranged on the upper surface of the movable mold core, a core driving mechanism is arranged on the mold blank and connected with the movable mold core, and the core driving mechanism is used for driving the movable mold core to rotate; and a demolding ejection mechanism is arranged below the movable mold core, the demolding ejection mechanisms are respectively connected with the corresponding product cavities, a demolding driving mechanism is arranged on the mold blank, the demolding driving mechanism can be connected with the demolding ejection mechanism, and the demolding driving mechanism is used for driving the demolding ejection mechanism to eject the product out of the product cavity.

As a further improvement of the present application, the core driving mechanism includes a first driving member and a transmission member, the first driving member is connected to the mold blank, the transmission member passes through the mold blank and then is connected to the movable mold core, and the first driving member is connected to the transmission member through a linkage mechanism; the first driving piece drives the linkage mechanism to move, so that the transmission piece and the movable mold core are driven to rotate.

As a further improvement of this application, the link gear includes gear and rack, the rack with first driving piece is connected, the gear with the mould embryo is connected, the gear with driving medium sliding connection, just the driving medium can be followed the gear revolve, the rack with gear engagement connects.

As the further improvement of this application, the gear sleeve is established the driving medium outside, driving medium lateral wall axial is equipped with the draw-in groove, gear inner wall axial is equipped with the sand grip, the sand grip card is gone into in the draw-in groove, just the sand grip with draw-in groove sliding connection.

As a further improvement of this application, first driving piece is first hydro-cylinder, the piston rod fixed connection of rack and first hydro-cylinder, the draw-in groove is followed the central axis symmetric distribution of driving medium has 4, the sand grip with draw-in groove quantity is the same, just the sand grip with the draw-in groove one-to-one sets up.

As a further improvement of the application, the demolding ejection mechanism comprises an ejector plate and an ejector pin, one end of the ejector pin is connected with the ejector plate, and the other end of the ejector pin penetrates through the movable mold core and then extends into the product mold cavity; the demolding driving mechanism comprises a second driving piece, the second driving piece is connected with the mold blank, and the second driving piece can drive the ejector plate to move towards the direction of the movable mold core.

As the further improvement of this application, be equipped with drawing of patterns guiding mechanism and thimble canceling release mechanical system on the movable mould core, drawing of patterns guiding mechanism with thimble canceling release mechanical system respectively with the thimble board is connected, drawing of patterns guiding mechanism is used for right the motion of thimble board carries out spacing direction, thimble canceling release mechanical system is used for the drive thimble and thimble board motion that resets.

As a further improvement of this application, drawing of patterns guiding mechanism includes a plurality of drawing of patterns guide post, the one end of drawing of patterns guide post with the movable mould core is connected, the other end of drawing of patterns guide post passes the thimble board, and with the thimble board is connected.

As a further improvement of the application, the thimble resetting mechanism comprises a resetting rod, one end of the resetting rod is connected with the movable mold core, and the other end of the resetting rod penetrates through the thimble plate and is connected with the thimble plate; the outside cover of release link is equipped with the elastic component, the both ends of elastic component respectively with movable mould core with the thimble board is connected.

As the further improvement of this application, the upper surface of mould embryo be equipped with the holding tank of movable mould core adaptation, be equipped with a plurality of core guide posts in the holding tank, on the movable mould core with the relevant position department of core guide post is equipped with spacing hole, the core guide post can insert spacing downthehole.

Compared with the prior art, the beneficial effect of this application is:

the injection molding machine can complete injection molding of multiple materials on a common injection molding machine, and a movable mold turntable does not need to be additionally arranged on the injection molding machine, so that the production input cost is effectively reduced; and this application adopts core actuating mechanism drive movable mould core to rotate to realize the switching between the shaping of multiple material, need not to drive whole movable mould board and rotate, reduced motion's weight, thereby can improve the precision of control, thereby reduce the impaired risk of mould part.

Specifically, after the first-color injection molding is finished, the movable mold core is firstly ejected out of the mold blank by the ejection mechanism of the injection molding machine; the core driving mechanism starts to work to drive the movable mold core to rotate, so that the positions of the product cavities are converted; then the ejection mechanism of the injection molding machine resets to drive the movable mold core to reset, and then the second-color injection molding is completed, so that the multi-color injection molding can be completed.

By adopting the technical scheme provided by the application, injection molding of multiple materials in one injection mold can be realized, and the cavities of all products are simultaneously injection molded, so that the processing efficiency of injection molding is improved.

Drawings

In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.

FIG. 1 is a schematic illustration of a product produced by an embodiment of the present application;

FIG. 2 is a front cross-sectional view of a product produced by an embodiment of the present application;

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

FIG. 4 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 5 is a schematic view of an assembled structure of a movable core and a core driving mechanism in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a demolding and ejecting mechanism in an embodiment of the present application;

FIG. 7 is a schematic view of the ejection state structure of the knock-out core in the embodiment of the present application;

fig. 8 is a schematic structural view of a product in a demolding state in the embodiment of the application.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

The advantageous effects of the present application will be described below by taking as an example an injection mold capable of injection molding the product shown in fig. 1 to 3.

As shown in fig. 4 to 8, an injection mold comprises a mold blank 1 and a movable mold core 2, wherein an accommodating groove 101 matched with the movable mold core 2 is formed in the upper surface of the mold blank 1, and the movable mold core 2 is installed in the accommodating groove 101 in a limiting manner. The upper surface of the movable mould core 2 is provided with two product cavities 21, the two product cavities 21 are symmetrically distributed along the central line of the movable mould core 2, the mould blank 1 is provided with a core driving mechanism, and the core driving mechanism is used for driving the movable mould core 2 to rotate.

Before injection molding, the injection mold is installed and fixed on an injection molding machine, and first color injection molding is carried out; after the first-color injection molding is finished, the movable mold core 2 is ejected out of the accommodating groove 101 by an ejection mechanism of the injection molding machine, and then the core driving mechanism starts to work to drive the movable mold core 2 to rotate 180 degrees, so that the positions of the two product cavities 21 are exchanged; then, an ejection mechanism of the injection molding machine resets to drive the movable mold core 2 to return to the accommodating groove 101 again, second-color injection molding is completed, and product demolding operation is performed after the second-color injection molding is completed.

This injection mold, two product die cavities 21 can mould plastics simultaneously, improvement machining efficiency that can be double, and when carrying out double-colored conversion, only need drive movable mould core 2 and rotate, have reduced motion's weight, can improve the precision of control effectively.

In other embodiments, the number of product cavities 21 may be any other number, i.e., the injection mold may also be used for injection molding of more than two materials.

The inside of the accommodating groove 101 is provided with 4 core guide posts 102, the 4 core guide posts 102 are respectively arranged at 4 corners of the accommodating groove 101, the positions, corresponding to the core guide posts 102, on the movable mold core 2 are respectively provided with limiting holes 22, and the core guide posts 102 can be inserted into the corresponding limiting holes 22; when the ejection mechanism of the injection molding machine ejects the movable mold core 2 out of the accommodating groove 101, the mold core guide posts 102 can slide in the limiting holes 22, and the movement of the movable mold core 2 is guided in a limiting manner by arranging the mold core guide posts 102 and the limiting holes 22, so that the transmission stability of the injection molding mold is improved.

In one embodiment, the core driving mechanism comprises a first oil cylinder 3 and a transmission member 4, the first oil cylinder 3 is fixedly installed on the mold blank 1, two ends of the transmission member 4 respectively penetrate through the upper surface and the lower surface of the mold blank 1, one end of the transmission member 4 is fixedly connected with the movable mold core 2, the other end of the transmission member 4 is a free end, and one end of the transmission member 4, which is far away from the movable mold core 2, is fixedly connected with the ejection mechanism of the injection molding machine during operation. The first oil cylinder 3 is connected with the transmission piece 4 through a linkage mechanism, and the first oil cylinder 3 can drive the linkage mechanism to move so as to drive the transmission piece 4 and the movable mold core 2 to rotate. In other embodiments, the first cylinder 3 may be replaced by a cylinder, a motor or other driving means.

In one embodiment, the linkage mechanism comprises a gear 5 and a rack 6, the gear 5 is installed in the mold blank 1 in a limiting manner, the rack 6 is fixedly connected with a piston rod of the first oil cylinder 3, and the rack 5 is limited in the mold blank 1 and can slide in the mold blank 1; the gear 5 is sleeved on the outer side of the transmission part 4, the transmission part 4 can axially slide relative to the gear 5, the gear 5 can drive the transmission part 4 to rotate, and the rack 6 is meshed with the gear 5. When the double-color injection molding switching is required, the ejection mechanism of the injection molding machine drives the transmission piece 4 to slide relative to the gear 5, and the transmission piece 4 ejects the movable mold core 2 out of the accommodating groove 101; then, the first oil cylinder 3 works to drive the rack 6 to slide in the die blank 1, the rack 6 drives the gear 5 to rotate in the die blank 1, and the gear 5 drives the transmission piece 4 and the movable die core 2 to rotate 180 degrees, so that the positions of the two product cavities are exchanged.

In other embodiments, the linkage mechanism may be other transmission methods in the prior art, such as gear set transmission, pulley transmission, etc.

In order to ensure the stability of the axial movement between the transmission piece 4 and the

gear

5, 4 clamping grooves 41 are symmetrically arranged on the outer side wall of the transmission piece 4 along the central axis of the transmission piece 4, raised lines 51 are respectively arranged at corresponding positions of the inner side wall of the gear 5 and the clamping grooves 41, and the raised lines 51 and the clamping grooves 41 are arranged in a one-to-one correspondence manner; when assembling the gear 5 and the transmission member 4, the convex strips 51 are respectively clamped into the corresponding slots 41. When the ejection mechanism of the injection molding machine pushes out the transmission member 4 to move, under the limiting action of the convex strip 51 and the clamping groove 41, the convex strip 51 slides in the clamping groove 41, so that the axial movement of the transmission member 4 is limited and guided. In other embodiments, the convex strip 51 may be disposed on the outer side wall of the transmission member 4, and the engaging groove 41 may be disposed on the inner side wall of the gear 5, and the specific connection motion relationship is the same as that of the present embodiment.

Two demolding ejection mechanisms are arranged below the movable mold core 2 and connected with the corresponding product cavity 21, and the demolding ejection mechanisms are used for ejecting the injection-molded product out of the product cavity 21; the mold blank 1 is provided with a demolding driving mechanism, the demolding driving mechanism can be connected with a demolding ejection mechanism, and the demolding driving mechanism is used for driving the demolding ejection mechanism to eject a product out of a product cavity.

In one embodiment, the demolding ejection mechanism comprises an ejector plate 7 and an ejector 8, the ejector 8 is fixedly mounted on the ejector plate 7, and the other end of the ejector 8 penetrates through the movable mold core 2 and then extends into the product cavity 21. The demoulding driving mechanism comprises a second oil cylinder 9, and the second oil cylinder 9 is fixedly arranged in the mould blank 1; when the second oil cylinder 9 works, a piston rod of the second oil cylinder 9 can be abutted against the ejector plate 7, so that the ejector plate 7 is pushed to move towards the movable mold core 2. During operation, after the second color injection molding is completed, the second oil cylinder 9 works, the second oil cylinder 9 pushes the ejector plate 7 to move towards the movable mold core 2, the ejector plate 7 pushes the ejector 8 to extend out of the product cavity 21, the ejector 8 ejects a molded product out of the product cavity 21, and the product demolding is completed.

In other embodiments, the second cylinder 9 can be replaced by a cylinder, a motor or other driving means.

And a demoulding guide mechanism and an ejector pin resetting mechanism are arranged on the movable mould core 2, one sides of the demoulding guide mechanism and the ejector pin resetting mechanism, which are far away from the movable mould core 2, are respectively connected with the ejector pin plate 7 in a limiting and sliding manner, the demoulding guide mechanism is used for limiting and guiding the movement of the ejector pin plate 7, and the ejector pin resetting mechanism is used for driving the ejector pin 8 and the ejector pin plate 7 to reset. In this embodiment, there are two demolding guide mechanisms and two thimble return mechanisms, and the two demolding guide mechanisms and the two thimble return mechanisms are arranged in one-to-one correspondence with the positions of the product cavities 21.

In one embodiment, the demoulding guide mechanism comprises three demoulding guide columns 10, one ends of the demoulding guide columns 10 are fixedly connected with the movable mould core 2, and the other ends of the demoulding guide columns 10 penetrate through the ejector plate 7 and are in sliding limit connection with the ejector plate 7; when the second oil cylinder 9 drives the ejector plate 7 to move, the ejector plate 7 can slide on the demoulding guide post 10, so that the movement direction of the ejector plate 7 is limited and guided. In other embodiments, the knockout guide post 10 may also be fixedly mounted on the ejector plate 7, and the other end passes through the movable mold core 2 and is in sliding limit connection with the movable mold core 2.

In one embodiment, the thimble resetting mechanism comprises a resetting rod 11, one end of the resetting rod 11 is fixedly connected with the movable mould core 2, and the other end of the resetting rod 11 penetrates through the thimble plate 7 and is in sliding limit connection with the thimble plate 7; the outer side of the reset rod 11 is sleeved with an elastic part 12, and two ends of the elastic part 12 are respectively fixedly connected with the movable mould core 2 and the ejector plate 7. When the second oil cylinder 9 drives the ejector plate 7 to move towards the movable mould core 2, the ejector plate 7 compresses the elastic part 12; after the second oil cylinder 9 is reset, that is, after the pushing force on the ejector plate 7 disappears, the ejector plate 7 is pushed to reset under the elastic force of the elastic member 12, and the ejector plate 7 drives the ejector 8 to move, so that the ejector 8 is reset into the product cavity 21.

In this embodiment, each needle return mechanism has two return rods 11 and two elastic members 12, and the elastic members 12 are coil springs, and in other embodiments, the elastic members 12 may be other elastic devices.

The specific working process of the injection mold is as follows:

before injection molding, the injection mold is arranged on an injection molding machine, so that one end of the transmission piece 4, which is far away from the movable mold core 2, is fixedly connected with an ejection mechanism of the injection molding machine;

firstly, performing first-color injection molding, wherein after the first-color injection molding is finished, an ejection mechanism of the injection molding machine works to push a transmission piece 4 to slide on a gear 5, and the transmission piece 4 pushes a movable mold core 2 to slide on a mold core guide column 102 until the transmission piece 4 pushes the movable mold core 2 out of an accommodating groove 101, and the transmission piece 4 cannot rotate in the process of pushing the movable mold core 2 due to the limit of a convex strip 51 and a clamping groove 41; then, the first oil cylinder 3 starts to work to drive the rack 6 to slide in the die blank 1, the rack 6 drives the gear 5 to rotate, and the gear 5 drives the transmission piece 4 and the movable die core 2 to rotate 180 degrees, so that the positions of the two product cavities 21 are exchanged; then, the ejection mechanism of the injection molding machine moves in a resetting manner to drive the movable mold core 2 to return until the movable mold core 2 is embedded into the accommodating groove 101; and (5) newly closing the mold to complete the second-color injection molding.

After the second color injection molding, the second oil cylinder 9 starts to work, a piston rod of the second oil cylinder 9 pushes the ejector plate 7 to move, the ejector plate 7 slides on the demolding guide post 10, the ejector plate 7 drives the ejector 8 to move, and the injection molded product is ejected to the product cavity 21 to complete demolding of the product; during the process that the second oil cylinder 9 pushes the ejector plate 7 to move, the ejector plate 7 compresses the elastic piece 12.

After demolding is finished, the second oil cylinder 9 is reset, the pushing force on the ejector plate 7 disappears at the moment, the ejector plate 7 is driven to reset under the elastic force action of the elastic piece 12, and the ejector plate 7 drives the ejector 8 to reset until the ejector 8 resets to the product cavity 21.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims

1. The utility model provides an injection mold for many material shaping which characterized in that: the movable mold core is in limit connection with the mold blank, at least two product cavities are formed in the upper surface of the movable mold core, a core driving mechanism is arranged on the mold blank and connected with the movable mold core, and the core driving mechanism is used for driving the movable mold core to rotate;

the demolding mechanism comprises a movable mold core, a demolding ejection mechanism and a demolding driving mechanism, wherein the demolding ejection mechanism is arranged below the movable mold core and is respectively connected with the corresponding product cavity, the demolding driving mechanism is arranged on the mold blank and can be connected with the demolding ejection mechanism, and the demolding driving mechanism is used for driving the demolding ejection mechanism to eject a product out of the product cavity.

2. The injection mold for multi-material molding according to claim 1, characterized in that: the core driving mechanism comprises a first driving piece and a transmission piece, the first driving piece is connected with the die blank, the transmission piece penetrates through the die blank and then is connected with the movable die core, and the first driving piece is connected with the transmission piece through a linkage mechanism;

the first driving piece drives the linkage mechanism to move, so that the transmission piece and the movable mold core are driven to rotate.

3. The injection mold for multi-material molding according to claim 2, characterized in that: the linkage mechanism comprises a gear and a rack, the rack is connected with the first driving piece, the gear is connected with the mold blank, the gear is connected with the transmission piece in a sliding mode, the transmission piece can rotate along with the gear, and the rack is connected with the gear in a meshed mode.

4. The injection mold for multi-material molding according to claim 3, characterized in that: the gear sleeve is established the driving medium outside, driving medium lateral wall axial is equipped with the draw-in groove, gear inner wall axial is equipped with the sand grip, the sand grip card is gone into in the draw-in groove, just the sand grip with draw-in groove sliding connection.

5. The injection mold for multi-material molding according to claim 4, characterized in that: the first driving piece is a first oil cylinder, the rack is fixedly connected with a piston rod of the first oil cylinder, 4 clamping grooves are symmetrically distributed along the central axis of the driving piece, the number of the convex strips is the same as that of the clamping grooves, and the convex strips and the clamping grooves are arranged in a one-to-one correspondence mode.

6. An injection mould for multi-material moulding according to any of the claims 1-5, characterised in that: the demolding ejection mechanism comprises an ejector plate and an ejector pin, one end of the ejector pin is connected with the ejector plate, and the other end of the ejector pin penetrates through the movable mold core and then extends into the product cavity;

the demolding driving mechanism comprises a second driving part, the second driving part is connected with the mold blank, and the second driving part can drive the ejector plate to move towards the direction of the movable mold core.

7. The injection mold for multi-material molding according to claim 6, characterized in that: the ejector pin resetting mechanism is used for driving the ejector pins and the ejector pin plate to reset.

8. The injection mold for multi-material molding according to claim 7, characterized in that: the demolding guide mechanism comprises a plurality of demolding guide columns, one ends of the demolding guide columns are connected with the movable mold core, and the other ends of the demolding guide columns penetrate through the ejector plate and are connected with the ejector plate.

9. The injection mold for multi-material molding according to claim 7, characterized in that: the ejector pin resetting mechanism comprises a resetting rod, one end of the resetting rod is connected with the movable mould core, and the other end of the resetting rod penetrates through the ejector pin plate and is connected with the ejector pin plate;

the outer side of the reset rod is sleeved with an elastic piece, and two ends of the elastic piece are connected with the movable mold core and the ejector plate respectively.

10. An injection mould for multi-material moulding according to any of the claims 1-5 or any of the claims 7-9, characterised in that: the upper surface of mould embryo be equipped with the holding tank of movable mould core adaptation, be equipped with a plurality of core guide posts in the holding tank, the movable mould core on with the relevant position department of core guide post is equipped with spacing hole, the core guide post can insert spacing downthehole.