CN212312633U

CN212312633U - Core-pulling structure of floating mold core

Info

Publication number: CN212312633U
Application number: CN202022005823.7U
Authority: CN
Inventors: 虞伟炳; 姚震; 李金国
Original assignee: Zhejiang Saihao Industrial Co ltd; Taizhou Vocational and Technical College
Current assignee: Zhejiang Saihao Industrial Co ltd; Taizhou Vocational and Technical College
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-01-08
Anticipated expiration: 2030-09-14

Abstract

The utility model provides a unsteady mould benevolence structure of loosing core belongs to injection mold technical field. The core-pulling mechanism solves the technical problems that the core-pulling structure of the existing injection mold is complex, the demolding speed is not good, and the like. This floating mould benevolence structure of loosing core includes the fixed die plate, links firmly fixed in fixed die plate's fixed die benevolence, movable mould board, locate in the movable mould board and pass movable mould benevolence and the one end of the laminating of fixed die benevolence and form the die cavity and inlay the needle that movable mould benevolence and extend to the die cavity, it wears to be equipped with to inlay the needle to slide in the movable mould benevolence, its characterized in that, be equipped with the locking piece that makes fixed die benevolence and movable mould benevolence lock each other on the fixed die benevolence, movable mould benevolence sliding connection is equipped with on the movable mould board and can carry out spacing locating part to the slip stroke of movable mould benevolence, the fixed die plate drives fixed die benevolence and movable mould benevolence and keeps away from behind movable. The utility model discloses the structure of loosing core improves drawing of patterns speed simultaneously simplifying.

Description

Core-pulling structure of floating mold core

Technical Field

The utility model belongs to the technical field of injection mold, concretely relates to unsteady mould benevolence structure of loosing core.

Background

The injection mold generally includes a movable mold core, a fixed mold core closed with the movable mold core to form a cavity, an ejector pin slidably inserted into the movable mold core, and an ejector plate capable of driving the ejector pin to slide to eject a molded product. Due to the shape or assembly requirement of a molded product, an insert pin with the inner end matched with the cavity surface is usually arranged in the movable mold core or the fixed mold core, and the phenomenon of adhesion with the insert pin is easy to occur when the molded product is demoulded, so that the product is deformed or the demoulding is difficult.

In order to solve this problem, the prior art generally separates the insert pin from the cavity, and then separates the movable mold core from the stationary mold core. For example, a deep-cavity core-pulling mechanism is disclosed in the patent literature (No. CN 210651711U) of our country, which includes a front mold plate, a front mold core (i.e., a fixed mold core) disposed in the front mold plate, a rear mold plate, and a rear mold core (i.e., a movable mold core) disposed in the rear mold plate, wherein a front mold panel is disposed at one end of the front mold plate away from the rear mold plate, an insert (i.e., an insert needle) fixedly connected to the front mold panel is slidably inserted into the front mold core, an ejector pin is slidably inserted into the rear mold core, the front mold panel and the front mold plate are connected by a limit screw, and a. When the product is demoulded, the front mould panel drives the insert to be separated from the cavity, the limiting screw and the spring can ensure the relative stability of outward movement of the front mould panel, and then the movable mould core and the fixed mould core are separated, so that the ejector plate can push the ejector pins to eject the formed product. However, the structure of the technical scheme is similar to that of the existing three templates (including the movable template, the fixed template and the elastic plate), and the elastic plate (such as the front template panel) is required to be arranged to drive the insert pin to separate from the cavity, so that the core-pulling structure of the mold is complex, the demolding procedure is complicated, and the demolding speed of the molded product is not improved.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a unsteady mould benevolence structure of loosing core, the utility model aims to solve the technical problem that: how to simplify the structure of loosing core and improve the speed of drawing of patterns simultaneously.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a unsteady mould benevolence structure of loosing core, includes the fixed die plate, links firmly fixed in fixed die plate's fixed die benevolence, movable mould board, locate in the movable mould board and pass movable mould benevolence and the one end of the laminating of fixed die benevolence and form the die cavity and inlay the needle that the movable mould benevolence extended to the die cavity, a serial communication port, be equipped with the locking piece that makes fixed die benevolence and movable mould benevolence lock each other on the fixed die benevolence, movable mould benevolence sliding connection is in the movable mould board and be equipped with on the movable mould board and carry out spacing locating part to the slip stroke of movable mould benevolence, the fixed die plate drives the fixed die benevolence and the movable mould benevolence is kept away.

The utility model discloses a theory of operation does: the locking piece enables the fixed die core and the movable die core to be locked with each other when the die is closed, so that the sealing of a cavity in the injection molding process is ensured, and the injection molding effect is ensured; after the injection molding is finished, the fixed mold plate starts to move towards the direction far away from the movable mold plate under the action of external force (such as hydraulic pressure and pulling force), and the movable mold core is driven by the fixed mold plate to be far away from the movable mold plate along with the fixed mold core, so that the mold cavity is separated from the insert pin (namely the insert pin is separated from the surface of a molded product), and the locking piece keeps a locking state; after the movable mould core is abutted to the limiting part, the movable mould core is limited by the limiting part and does not move along with the fixed mould plate, the fixed mould plate continues to drive the fixed mould core to move, the locking part is enabled to unlock, meanwhile, the fixed mould core and the movable mould core are separated, and the formed product is convenient to remove. The limiting piece is arranged, so that the movable die core can move relative to the movable die plate, the sliding stroke of the movable die core can be limited, the separation distance between the movable die core and the movable die plate is convenient to control, and the stable movement of the movable die core is guaranteed while the separation of the cavity and the inner end of the insert pin is ensured. Compared with a three-template structure in the prior art, the fixed template in the patent can drive the movable mold core to move, so that the insert needle is separated from the surface of a formed product, an elastic plate is not required to be arranged, namely ejection of the formed product is realized in the two templates (comprising the movable template and the fixed template), the core pulling structure of the mold is effectively simplified, meanwhile, the fixed template in the patent can sequentially drive the movable mold core to be separated from the movable template, and the fixed mold core is separated from the movable mold core, so that the demolding procedure is simplified, and the demolding speed can be improved.

In the floating die core pulling structure, the limiting part comprises a nut and a screw rod, the lower end of the screw rod is screwed in the movable die plate, a groove for the limiting part to be inserted is formed in the movable die core, the inner wall of the groove is provided with a supporting surface which is opposite to the lower end face of the nut, and a space is formed between the supporting surface and the lower end face of the nut. The limiting part can be a limiting bolt or a limiting screw and the like, when the die is closed, the lower end of the limiting part is in threaded connection with the movable die plate, the nut of the limiting part is located in the groove of the movable die core and has a distance with the abutting surface of the groove, when the fixed die plate drives the fixed die core and the movable die core to move upwards together, the movable die core is limited and cannot move outwards when the movable die core moves upwards to the abutting surface and abuts against the lower end face of the nut. The mounting structure of locating part is succinct reasonable, and the mould processing preparation of being convenient for is favorable to simplifying the structure of loosing core of mould, and the locating part can play the guide effect at movable mould benevolence removal in-process simultaneously, is favorable to guaranteeing the stable removal of movable mould benevolence, avoids movable mould benevolence to appear squinting and influences drawing of patterns speed.

In the floating die core pulling structure, the screw comprises a thread section with external threads and a connecting section for connecting the thread section and the nut, and the diameter of the connecting section is larger than that of the thread section. When the die is closed, the threaded section is in threaded connection with the movable die plate, the diameter of the connecting section is larger than that of the threaded section, the connecting section can be prevented from moving downwards, the distance between the abutting surface and the lower end surface of the nut is ensured to be unchanged, the moving distance of the movable die core is ensured to be unchanged when the die is opened, the separation of the die cavity and the insert pin is ensured, and the demolding speed is ensured.

In the floating die core pulling structure, an elastic resetting piece which enables the moving die core to have a trend of being far away from the moving die plate is arranged in the moving die plate. In the process that the fixed die plate drives the fixed die core and the movable die core to move together, the elastic reset piece can assist in pushing the movable die core to move, the locking state of the locking piece is ensured, the movable die can be accelerated to move plastic, and the demolding speed is improved.

In the core pulling structure of the floating die core, a mounting groove for accommodating an elastic reset piece is arranged in the movable die plate, the elastic reset piece is a pressure spring, the lower end of the elastic reset piece is abutted against the bottom of the mounting groove, and the upper end of the elastic reset piece is abutted against the movable die core. The elastic reset piece is simple and reasonable in mounting structure, facilitates mold processing and preparation, and is favorable for simplifying the core pulling structure of the mold. Preferably, the quantity that the elasticity resets is two at least, and the elasticity resets and is the even interval setting of circumference, ensures that movable mould benevolence atress is even, move steadily when the die sinking, avoids movable mould benevolence to appear the skew and influences drawing of patterns speed.

In the above floating mold core pulling structure, the locking piece has a clamping protrusion, and the moving mold core is provided with a clamping groove for clamping the clamping protrusion. The mode that the locking piece passes through the joint makes movable mould benevolence and cover half benevolence lock each other, and in the protruding draw-in groove of inserting of card of locking piece, can ensure movable mould benevolence and cover half benevolence and lock each other, still can make the fixed die plate drive and move on the cover half benevolence and make the locking piece unblock. Preferably, the locking piece and the corresponding clamping groove structure on the movable die core are nylon draw hooks or resin shutters, the structure is simple, and low-cost preparation of the die is facilitated.

In foretell floating mould benevolence structure of loosing core, it establishes the groove to be equipped with on the movable mould board to inlay, inlay and establish the inslot and can dismantle to inlay and be equipped with and inlay the faller, the lower extreme of inlaying the needle links firmly on inlaying the faller, the upper end of inlaying the needle passes movable mould board and movable mould benevolence in proper order and reaches the die cavity. Not only can ensure the installation stability of the insert pin in the movable mould core, but also is convenient for the installation and the disassembly of the insert pin.

In foretell floating mould benevolence structure of loosing core, the movable mould board below is equipped with the thimble board, the lower extreme of thimble links firmly on the thimble board, the thimble has been linked firmly on the thimble board, the upper end of thimble passes movable mould board and movable mould benevolence in proper order and reaches the die cavity. The ejector pin plate drives the ejector pin to push out the molded product under the action of external force (such as hydraulic pressure and pulling force).

Compared with the prior art, the utility model has the advantages of it is following:

1. through the setting of locking piece and locating part, make the fixed die plate can drive movable mould benevolence and remove, make die cavity and inlay the needle separation, need not to set up the diving board, realized ejecting of shaping product promptly in two templates, effectively simplified the structure of loosing core of mould.

2. Through the setting of locking piece and locating part, make the fixed die plate can drive movable mould benevolence in proper order and break away from movable mould board, the fixed mould benevolence breaks away from movable mould benevolence, has simplified the drawing of patterns process, can improve drawing of patterns speed.

Drawings

Fig. 1 is a schematic sectional view of the present embodiment in a clamped state.

Fig. 2 is an enlarged schematic view of a region a in fig. 1.

Fig. 3 is a schematic cross-sectional view illustrating the movable mold core and the position limiting member in the mold opening of the present embodiment.

Fig. 4 is a schematic sectional view of the ejector pin ejecting the molded product in this embodiment.

In the figure, 1, a fixed template; 2. fixing a mold core; 3. moving the template; 3a, mounting grooves; 4. a movable mould core; 4a, a groove; 4a1, abutment face; 5. a thimble; 6. inserting a needle; 7. a locking member; 8. an elastic reset member; 9. a limiting member; 91. a nut; 92. a screw; 921. a threaded segment; 922. a connecting section; 10. an ejector plate; 11. embedding a needle plate; 12. a guide block; 13 forming the product.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, the present embodiment includes a fixed mold plate 1, a fixed mold core 2 fixedly connected in the fixed mold plate 1, a movable mold plate 3 located below the fixed mold plate 1, a movable mold core 4 disposed in the movable mold plate 3 and attached to the fixed mold core 2 to form a mold cavity, and an insert pin 6 having one end penetrating through the movable mold core 4 and extending to the mold cavity. An ejector pin plate 10 is arranged below the movable mould plate 3, the lower end of an ejector pin 5 is fixedly connected to the ejector pin plate 10, and the upper end of the ejector pin 5 sequentially penetrates through the movable mould plate 3 and the movable mould core 4 and is matched with the mould cavity; the movable mould plate 3 is provided with an embedding groove, an embedding needle plate 11 is detachably embedded in the embedding groove, the lower end of an embedding needle 6 is fixedly connected to the embedding needle plate 11, the upper end of the embedding needle 6 sequentially penetrates through the movable mould plate 3 and the movable mould core 4 plate and reaches the cavity, the installation stability of the embedding needle 6 in the movable mould core 4 can be ensured, and the installation and the disassembly of the embedding needle 6 are facilitated. The fixed die core 2 is hinged with a locking piece 7 which enables the fixed die core 2 and the movable die core 4 to be locked with each other, the locking piece 7 enables the fixed die core 2 and the movable die core 4 to be locked with each other when the die is closed, the sealing of a cavity in the injection molding process is guaranteed, and the injection molding effect is guaranteed. The movable mould plate 3 is internally provided with an elastic resetting piece 8 which enables the movable mould core 4 to have a trend of being far away from the movable mould plate 3, and the elastic resetting piece 8 can assist the movable mould core 4 to be separated from the movable mould plate 3. The movable mould core 4 is connected in the movable mould plate 3 in a sliding mode, the movable mould core 3 is provided with a limiting part 9 capable of limiting the sliding stroke of the movable mould core 4, the limiting part 9 is arranged, the movable mould core 4 can move relative to the movable mould plate 3, the stroke of the relative movement can be limited, the separation distance between the movable mould core 4 and the movable mould plate 3 can be controlled conveniently, and the stable movement of the movable mould core 4 can be guaranteed while the separation of the cavity and the inner end of the insert pin 6 is ensured. The fixed die plate 1 drives the fixed die core 2 and the movable die core 4 to be away from the movable die plate 3 together until the movable die core 4 abuts against the limiting part 9, and the fixed die plate 1 can continuously move to unlock the locking part 7 and drive the fixed die core 2 to be separated from the movable die core 4.

As shown in fig. 2, the limiting member 9 includes a nut 91 and a screw 92, the lower end of the screw 92 is screwed into the movable mold plate 3, a groove 4a for inserting the limiting member 9 is provided in the movable mold core 4, an inner wall of the groove 4a has an abutting surface 4a1 opposite to the lower end surface of the nut 91, and a space is provided between the abutting surface 4a1 and the lower end surface of the nut 91. The limiting part 9 can be a limiting bolt or a limiting screw and the like, the mounting structure is simple and reasonable, the mold is convenient to process and manufacture, the core pulling structure of the mold is facilitated to be simplified, meanwhile, the limiting part 9 can play a role in guiding the moving process of the moving mold core 4, the stable moving of the moving mold core 4 is facilitated to be ensured, and the moving mold core 4 is prevented from deviating to influence the demolding speed.

The screw 92 includes a threaded section 921 having an external thread and a connection section 922 connecting the threaded section 921 and the nut 91, the connection section 922 having a diameter larger than that of the threaded section 921. When the die is closed, the limiting piece 9 can be prevented from moving downwards, the distance between the abutting surface 4a1 and the lower end surface of the nut 91 is ensured to be unchanged, the moving distance of the movable die core 4 is ensured to be unchanged when the die is opened, the separation of the die cavity and the insert pin 6 is ensured, and the demolding speed is ensured.

The movable mould plate 3 is internally provided with a mounting groove 3a for accommodating an elastic resetting piece 8, the elastic resetting piece 8 is a pressure spring, the lower end of the elastic resetting piece 8 is abutted against the bottom of the mounting groove 3a, and the upper end of the elastic resetting piece 8 is abutted against the movable mould core 4. The mounting structure of the elastic reset piece 8 is simple and reasonable, the mold can be conveniently processed and prepared, and the core pulling structure of the mold can be simplified. The quantity that elasticity resets 8 is two at least, and elasticity resets 8 and is the even interval setting of circumference, and the guarantee movable mould benevolence 4 atress is even, moves steadily when the die sinking, avoids movable mould benevolence 4 skew to appear and influences drawing of patterns speed.

The locking piece 7 is provided with a clamping protrusion, and the movable die core 4 is provided with a clamping groove clamped with the clamping protrusion. Locking piece 7 makes movable mould benevolence and cover half benevolence lock each other through the mode of joint, and in the protruding draw-in groove that inserts of card of locking piece 7, can ensure movable mould benevolence 4 and cover half benevolence 2 and lock each other, still can make fixed die plate 1 drive 2 upward movements of cover half benevolence and make 7 unblocks of locking piece. The locking piece 7 and the corresponding clamping groove structure on the movable mould core 4 can be a nylon draw hook or a resin shutter and the like, and the structure is simple, so that the low-cost preparation of the mould is facilitated. Or the locking piece 7 is provided with a clamping groove, and the movable mould core 4 is provided with a clamping protrusion clamped with the clamping groove.

Still be equipped with guide block 12 in the movable mould board 3, guide block 12 and the 4 lateral walls butt of movable mould benevolence, can move on movable mould benevolence 4 and break away from the in-process of movable mould board 3 and play the guide effect to the removal of movable mould benevolence 4, ensure that movable mould benevolence 4 atress is even, move steadily when the die sinking, avoid movable mould benevolence 4 to appear the skew to influence drawing of patterns speed.

In the mold closing state, the locking member 7 locks the movable mold core 4 and the fixed mold core 2 to each other, the lower end of the limiting member 9 is screwed with the movable mold plate 3, and the nut 91 of the limiting member 9 is located in the groove 4a of the movable mold core 4 and has a distance from the abutting surface 4a1 of the groove 4 a.

The mold opening process is as follows: as shown in fig. 3, after the injection molding is completed, the fixed mold plate 1 starts to move in a direction away from the movable mold plate 3 under the action of an external force (e.g., hydraulic pressure or tensile force), and the movable mold core 4 is driven by the fixed mold plate 1 to move away from the movable mold plate 3 along with the fixed mold core 2 under the action of the locking member 7 and the elastic restoring member 8, so that the mold cavity is separated from the insert pin 6 (i.e., the insert pin 6 is separated from the surface of the molded product 13), and the locking member 7 maintains a locked state. Then, when the movable mold core 4 moves upward until the abutting surface 4a1 abuts against the lower end surface of the nut 91, the movable mold core 4 is limited by the limiting piece 9 and cannot move any further. Next, as shown in fig. 4, the fixed die plate 1 continues to drive the fixed die core 2 to move, so that the locking member 7 is unlocked and the fixed die core 2 and the movable die core 4 are separated, thereby facilitating the ejector pin 5 to eject the molded product 13. The fixed die plate 1 in this embodiment can drive the movable die core 4 to move, so that the insert pins 6 are separated from the surface of the molded product 13, and no elastic plate is needed, that is, the molded product 13 is ejected out of the two die plates, thereby effectively simplifying the core-pulling structure of the die, meanwhile, the fixed die plate 1 in this embodiment can drive the movable die core 4 to be separated from the movable die plate 3 and the fixed die core 2 to be separated from the movable die core 4 in sequence, thereby simplifying the demolding procedure and improving the demolding speed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, fixed template is used more herein; 2. fixing a mold core; 3. moving the template; 3a, mounting grooves; 4. a movable mould core; 4a, a groove; 4a1, abutment face; 5. a thimble; 6. inserting a needle; 7. a locking member; 8. an elastic reset member; 9. a limiting member; 91. a nut; 92. a screw; 921. a threaded segment; 922. a connecting section; 10. an ejector plate; 11. embedding a needle plate; 12. A guide block; 13 shaped product, etc., without excluding the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a unsteady mould benevolence structure of loosing core, includes fixed die plate (1), links firmly fixed in fixed die plate (1) in fixed die plate (2), movable mould board (3), locate in movable mould board (3) and with fixed die benevolence (2) laminating movable mould benevolence (4) and one end of forming the die cavity pass movable mould benevolence (4) and extend to inlay needle (6) of die cavity, a serial communication port, be equipped with locking piece (7) that make fixed die benevolence (2) and movable mould benevolence (4) lock each other on fixed die plate (2), movable mould benevolence (4) sliding connection is equipped with in movable mould board (3) and on movable mould board (3) and can carry out spacing locating part (9) to the slip stroke of movable mould benevolence (4), fixed die plate (1) drive fixed die benevolence (2) and movable mould benevolence (4) keep away from movable mould benevolence (3) to movable mould benevolence (4) and locating part (9) butt together, fixed die plate (1) can continue to move ).

2. The floating die core pulling structure according to claim 1, wherein the limiting member (9) comprises a nut (91) and a screw (92), the lower end of the screw (92) is screwed into the movable die plate (3), a groove (4a) for the limiting member (9) to be inserted is formed in the movable die core (4), the inner wall of the groove (4a) is provided with an abutting surface (4a1) opposite to the lower end surface of the nut (91), and a distance is formed between the abutting surface (4a1) and the lower end surface of the nut (91).

3. The floating core back structure according to claim 2, wherein the screw (92) comprises a threaded section (921) having an external thread and a connecting section (922) connecting the threaded section (921) and the nut (91), and the diameter of the connecting section (922) is larger than that of the threaded section (921).

4. The floating die core pulling structure according to claim 1, wherein an elastic resetting piece (8) enabling the movable die core (4) to have a tendency to be away from the movable die plate (3) is arranged in the movable die plate (3).

5. The floating die core pulling structure according to claim 4, wherein a mounting groove (3a) for accommodating an elastic resetting piece (8) is formed in the movable die plate (3), the elastic resetting piece (8) is a compression spring, the lower end of the elastic resetting piece (8) abuts against the bottom of the mounting groove (3a), and the upper end of the elastic resetting piece (8) abuts against the movable die core (4).

6. The floating die core pulling structure according to claim 1, wherein the locking piece (7) has a clamping protrusion, and a clamping groove for clamping the clamping protrusion is formed on the moving die core (4).

7. The floating die core pulling structure according to any one of claims 1 to 6, wherein the movable die plate (3) is provided with an embedding groove, an embedding needle plate (11) is detachably embedded in the embedding groove, the lower end of the embedding needle (6) is fixedly connected to the embedding needle plate (11), and the upper end of the embedding needle (6) sequentially penetrates through the movable die plate (3) and the movable die core (4) to reach the inside of the die cavity.

8. The floating die core pulling structure according to claim 7, wherein an ejector plate (10) is arranged below the movable die plate (3), an ejector pin (5) is fixedly connected to the ejector plate (10), and the upper end of the ejector pin (5) sequentially penetrates through the movable die plate (3) and the movable die core (4) to reach the inside of the die cavity.