CN218139579U - Rear die twisted tooth depoling injection mold - Google Patents

Abstract

The utility model discloses a rear mould hank tooth depoling injection mold, including front mould subassembly, mold core assembly and the mold core assembly that is located between front mould subassembly and the rear mould subassembly, the mold core assembly includes front mold core and back mold core, and front mold core and back mold core jointly constitute the injection molding cavity that is used for injection molding product shaping, and back mold core includes first back mold core piece and second back mold core piece, and first back mold core piece and second back mold core piece locate the rear side of front mold core side by side; the rear die assembly comprises a thread twisting mechanism, the thread twisting mechanism comprises a thread twisting shaft, a gear assembly and a rack assembly, the gear assembly is connected with the thread twisting shaft, the rack assembly is meshed with the gear assembly, and the gear assembly is driven to rotate and drives the thread twisting shaft to rotate. The utility model provides a current injection mold structure is complicated, the inconvenient problem of drawing of patterns.

Description

Rear die twisted tooth depoling injection mold

Technical Field

The utility model relates to an injection mold's technical field, concretely relates to back mould hank tooth depoling injection mold.

Background

Injection molding is a processing method used in mass production of some parts, and comprises the specific steps of injecting a heated and melted material into an injection molding cavity formed by covering a front mold core and a rear mold core under high pressure, and obtaining a molded product after cooling and solidification. The injection mold is a main injection molding device for producing plastic products. When some products with internal threads are produced in an injection molding mode, the thread twisting mechanism can be adopted, the end, with the threads, of the thread twisting shaft is arranged in the injection molding cavity to be subjected to injection molding, and the thread twisting shaft needs to be separated from the injection molding cavity after the injection molding is finished. The core-stripping process of the injection mold with the thread-twisting mechanism is complex, the product is difficult to be ensured not to stick to the sliding block and automatically fall off, the product is easy to damage, and the product percent of pass is reduced.

SUMMERY OF THE UTILITY MODEL

To this end, the utility model provides a back mould hank tooth depoling injection mold to solve the technical problem that current injection mold structure is complicated, the drawing of patterns is inconvenient.

The utility model discloses a following technical scheme realizes:

the utility model provides a back mould hank tooth depoling injection mold, including front mould subassembly, mold core assembly and the mold core assembly that is located between front mould subassembly and the back mould subassembly, the mold core assembly includes front mold core and back mold core, and front mold core and back mold core constitute the injection molding cavity that is used for injection molding product shaping jointly, and back mold core includes first back mould pellet and second back mould pellet, and first back mould pellet and second back mould pellet locate the rear side of front mold core side by side; the rear die assembly comprises a thread twisting mechanism, the thread twisting mechanism comprises a thread twisting shaft, a gear assembly and a rack assembly, the gear assembly is connected with the thread twisting shaft, the rack assembly is meshed with the gear assembly, and the gear assembly is driven to rotate and drive the thread twisting shaft to rotate.

Furthermore, the first rear die core block and the second rear die core block are respectively provided with a groove and a convex block which are matched with each other on the abutting surfaces of the first rear die core block and the second rear die core block which are abutted against each other.

Furthermore, the rear mould component comprises a base, a rear mould seat plate, a gear seat plate and a rear mould plate which are sequentially arranged from back to front, and the front mould component comprises a panel, a hot runner plate and a front mould plate which are sequentially arranged from front to back; the gear assembly comprises a driving wheel, a first gear coaxially connected with the driving wheel and a driven gear meshed with the first gear, and the tooth twisting shaft is arranged on the driven gear; the rack assembly is including rack and actuating cylinder, and actuating cylinder and rack connection, actuating cylinder fix locate back die block board one side, offer the mounting groove that supplies the rack to pack into and supply the action wheel to pack into on the back die block board, first gear with from gear installation on the gear base board.

The buckling machine assembly comprises a first pull rod, a second pull rod and a buckling machine base, the buckling machine base is fixedly arranged on one side of the rear template, a sliding block and an elastic piece are arranged in the buckling machine base, the elastic piece is arranged between the inner side of the buckling machine base and the sliding block, and a through hole is formed in the middle of the sliding block; the front end of the first pull rod is connected with the front template, the first pull rod penetrates through a through hole in the middle of the sliding block, and the rear end of the first pull rod is provided with a clamping block for clamping with the sliding block; the rear end of the second pull rod is connected with the gear seat plate, the front end of the second pull rod is provided with a guide block, the guide block of the second pull rod is driven to abut against the sliding block through the backward movement of the second pull rod, the elastic part is compressed, and the sliding block is driven to move laterally.

Furthermore, the rear mold core further comprises a first guide slide block and a second guide slide block which are obliquely arranged, a first guide hole for the first guide slide block to be inserted correspondingly is formed in the first rear mold core block, a second guide hole for the second guide slide block to be inserted correspondingly is formed in the second rear mold core block, the front ends of the first guide slide block and the second guide slide block are fixed on a front mold plate of the front mold assembly, the front mold plate is driven to move forwards, and the first guide slide block and the second guide slide block are driven to move forwards, so that the first rear mold core block and the second rear mold core block respectively move towards the directions away from each other along the oblique directions of the first guide slide block and the second guide slide block.

Furthermore, the number of the first guide slide block and the second guide slide block is two, and the first guide slide block and the second guide slide block are respectively and symmetrically arranged on two sides of the first rear die core block and the second rear die core block.

Furthermore, the injection molding cavity can be used for injection molding of four products, the number of the thread forming shafts and the number of the slave gears are four, two slave gears adjacent to the first gear are directly meshed with the first gear, and the other two slave gears far away from the first gear are meshed with the adjacent slave gears through the second gear, so that the two slave gears are indirectly meshed with the first gear.

After the technical scheme is adopted, the utility model discloses following beneficial effect has: the utility model realizes the forming of the internal thread of the product by arranging the thread twisting mechanism on the rear mould component, and the thread twisting mechanism is arranged on the rear mould component, thereby facilitating the core-stripping action of the thread twisting shaft and the injection molding product; and the rear die core adopts the form of the first rear die core block and the second rear die core block, so that the demolding of the injection molding product is convenient to realize.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a first schematic structural view of the mold core assembly and the rear mold assembly of the present invention;

fig. 3 is a second schematic structural view of the mold core assembly and the rear mold assembly at another angle;

FIG. 4 shows a cross-sectional view of FIG. 3;

fig. 5 is a schematic structural view of the thread twisting mechanism of the present invention;

fig. 6 is an exploded view of the mold core assembly of the present invention.

Description of the reference symbols:

the front mold comprises a front mold component 1, a panel 11, a heat circulation plate 12, a front mold plate 13 and a pouring gate 10;

the mold core assembly 2, the front mold core 21, the rear mold core 22, the first rear mold core block 221, the first guide hole 2210, the second rear mold core block 222, the second guide hole 2220, the first guide block 223 and the second guide block 224;

the rear die assembly 3, the base 31, the rear die base plate 32, the gear base plate 33 and the rear die plate 34;

the thread twisting mechanism 4, the thread twisting shaft 41, the gear assembly 42, the first gear 421, the slave gear 422, the second gear 423, the rack assembly 43, the rack 431 and the driving oil cylinder 432;

the button machine component 5, a first pull rod 51, a clamping block 511, a second pull rod 52, a guide block 521, a button machine seat 53, a sliding block 54, a through hole 541 and an elastic piece 55;

a groove 6 and a bump 7.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "center", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 6, the present embodiment provides a rear mold threading and core-stripping injection mold, as a preferred embodiment of the present invention, the rear mold threading and core-stripping injection mold comprises a front mold assembly 1, a rear mold assembly 3 and a mold core assembly 2 located between the front mold assembly 1 and the rear mold assembly 3, which are sequentially arranged from front to rear and can move relatively; the mold core assembly 2 comprises a front mold core 21 and a rear mold core 22, and the front mold core 21 and the rear mold core 22 jointly form an injection molding cavity for injection molding of an injection molding product.

Specifically, referring to fig. 1, the front mold assembly 1 includes a face plate 11, a thermal flow plate 12 and a front mold plate 13, which are sequentially arranged from front to back, the face plate 11 is provided with a gate 10, the thermal flow plate 12 is provided with a plurality of injection molding runners, the injection molding runners are connected with the front mold plate 13 and the gate 10, and molten plastic extruded by the plastic extruder flows into the injection molding runners through the gate 10 and enters an injection molding cavity to be solidified and molded after cooling. In this embodiment, the injection molding cavity can realize the injection molding of 4 products at a time. Of course, in other embodiments, the specific structure of the front mold assembly 1 is not limited thereto. In this embodiment, the direction of the injection mold in the use state of being fixedly placed on the ground is taken as the description direction, that is, the side facing the front mold assembly 1 is the front side, and the side facing the rear mold assembly is the rear side.

In this embodiment, referring to fig. 2 to 3 and fig. 6, the rear mold core 22 includes a first rear mold core block 221 and a second rear mold core block 222, and the first rear mold core block 221 and the second rear mold core block 222 are arranged side by side at the rear side of the front mold core. Referring to fig. 6, the first rear core block 221 and the second rear core block 222 are respectively provided with a groove 6 and a protrusion 7 which are matched with each other on the abutting surfaces of the two abutting against each other, so as to realize the tight connection of the first rear core block 221 and the second rear core block 222. The rear die core 22 further includes a first guide block 223 and a second guide block 224, which are obliquely arranged, the first rear die core block 221 is provided with a first guide hole 2210 for the first guide block 223 to be correspondingly inserted, the second rear die core block 222 is provided with a second guide hole 2220 for the second guide block 224 to be correspondingly inserted, the front ends of the first guide block 223 and the second guide block 224 are fixed on the front die plate 13 of the front die assembly 1, and the first guide block 223 and the second guide block 224 are driven to move forward by driving the front die plate 13 to move forward, so that the first rear die core block 221 and the second rear die core block 222 respectively move in directions away from each other along the oblique directions of the first guide block 223 and the second guide block 224. Further, the number of the first guide blocks 223 and the second guide blocks 224 is two, and the two guide blocks are symmetrically arranged on two sides of the first rear core block 221 and the second rear core block 222, respectively. In this way, during demolding, the front template 13 is driven to move forward to drive the first rear mold core block 221 and the second rear mold core block 222 to be separated from the injection product, so that the separation of the injection product from the first rear mold core block 221 and the second rear mold core block 222 is ensured.

With continued reference to fig. 1 to 3, the rear mold assembly 3 includes a base 31, a rear mold base plate 32, a gear base plate 33, and a rear mold plate 34, which are arranged in this order from the rear to the front. The thread-twisting mechanism 4 is arranged on the rear module component 3. Specifically, referring to fig. 5, the thread winding mechanism 4 includes a thread winding shaft 41, a gear assembly 42 and a rack assembly 43, the gear assembly 42 is connected to the thread winding shaft 41, and the rack assembly 43 is engaged with the gear assembly 42 to drive the gear assembly 42 to rotate and drive the thread winding shaft 41 to rotate. Further, the gear assembly 42 includes a driving wheel, a first gear 421 coaxially connected with the driving wheel, and a driven gear 422 engaged with the first gear 421, and the thread shaft 41 is mounted on the driven gear 422; the rack assembly 43 comprises a rack 431 and a driving cylinder 432, the driving cylinder 432 is connected with the rack 431 and drives the rack 431 to move, the driving cylinder 432 is fixedly arranged at one side of the rear mold base plate 32, a mounting groove for mounting the rack 431 and a driving wheel is formed in the rear mold base plate 32, and the first gear 421 and the driven gear 422 are mounted on the gear base plate 33. In this embodiment, the injection molding cavity realizes injection molding of 4 products at a time, and accordingly, the number of the hinge shaft 41 and the slave gear 422 is 4, two slave gears 422 adjacent to the first gear 421 are directly meshed with the first gear 421, and the other two slave gears 422 far away from the first gear 421 are meshed with the adjacent slave gears 422 through the second gear 423, so as to be indirectly meshed with the first gear 421. During demolding, in the process of moving the rear mold assembly 3 backwards, the driving oil cylinder 432 drives the rack 431 to move, so that the gear assembly 42 is driven to rotate and is transmitted to the hinge shaft 41, the hinge shaft 41 is driven to rotate, and the injection molding product is separated from the hinge shaft 41. In this embodiment, locate back mould subassembly 1 through hank tooth mechanism 4 on to realize injection moulding product's internal thread's formation, and hank tooth mechanism 4 sets up on back mould subassembly 1, with the cooperation of knot quick-witted subassembly 5 that sets up on the back mould subassembly 1, the hank tooth axle 41 of being convenient for and injection moulding product's depoling action.

Referring to fig. 3 to 4, the locking assembly 5 includes a first pull rod 51, a second pull rod 52 and a locking base 53, the locking base 53 is fixed on one side of the rear mold plate 34, a sliding block 54 and an elastic element 55 are disposed in the locking base 53, the elastic element 55 is disposed between the inner side of the locking base 53 and the sliding block 54, and a through hole 541 is disposed in the middle of the sliding block 54; the front end of the first pull rod 51 is connected with the front template 13, the first pull rod 51 passes through a through hole 541 in the middle of the sliding block 54, and the rear end is provided with a clamping block 511 for clamping with the sliding block 54; the rear end of the second pull rod 52 is connected with the rear template 34, the front end is provided with a guide block 521, and the guide block 521 of the second pull rod 52 is driven to abut against the sliding block 54 by the backward movement of the second pull rod 52, so as to compress the elastic element 55 and drive the sliding block 54 to move laterally. When demoulding, the front mould component 1 moves forwards, the movement of the front mould plate 13 drives the first pull rod 51 to move forwards, so that the front mould component 1 is separated from the mould core component 2 until the clamping block 511 at the rear end of the first pull rod 51 is abutted against the sliding block 54, and at the moment, the front mould plate 13 does not move any more; secondly, the rear mold assembly 3 moves backward, and the backward movement drives the second pull rod 52 connected with the gear seat plate 33 to move backward until the guide block 521 of the second pull rod 52 abuts against the sliding block 54, and compresses the elastic member 55, and drives the sliding member 54 to move laterally, so that the clamping block 511 of the first pull rod 51 no longer abuts against the sliding block 54, and the front mold plate 13 can continue to move forward, thereby realizing the separation of the front mold assembly 1 and the rear mold assembly 3.

The demoulding process of the rear mould twisted tooth depoling injection mould is as follows:

the front die assembly 1 is moved forwards, and the front die plate 13 of the front die assembly 1 moves forwards to drive the first pull rod 51 connected with the front die plate to move forwards until the clamping block 511 at the rear end of the first pull rod 51 is abutted to the sliding block 54, at the moment, the front die plate 13 does not move any more, and the front die core 21 is separated from the injection molding product;

meanwhile, the forward movement of the front mold plate 13 drives the first guide block 223 and the second guide block 224 to move forward, so that the first rear mold core block 221 and the second rear mold core block 222 respectively move in the direction away from each other along the inclined directions of the first guide block 223 and the second guide block 224, and are separated from the injection molded product;

the rear die assembly 3 is moved backwards, and in the process of moving the rear die assembly 3 backwards, the thread twisting mechanism 4 acts, namely the driving oil cylinder 432 drives the rack 431 to move, so that the gear assembly 42 is driven to rotate and is transmitted to the thread twisting shaft 41, so that the thread twisting shaft 41 rotates, and the injection molding product is separated from the thread twisting shaft 41;

meanwhile, the backward movement of the rear mold assembly 3 drives the second pull rod 52 connected with the gear seat plate 33 to move backward until the guide block 521 of the second pull rod 52 abuts against the sliding block 54, and the elastic element 55 is compressed and drives the sliding element 54 to move laterally, so that the clamping block 511 of the first pull rod 51 does not abut against the sliding block 54 any more, and the front mold plate 13 can continue to move forward, thereby realizing the demolding of the injection molded product.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. The utility model provides a back mould hank tooth depoling injection mold which characterized in that: the mold core assembly comprises a front mold core and a rear mold core, the front mold core and the rear mold core jointly form an injection molding cavity for injection molding of a product, the rear mold core comprises a first rear mold core block and a second rear mold core block, and the first rear mold core block and the second rear mold core block are arranged on the rear side of the front mold core side by side; the rear die assembly comprises a thread twisting mechanism, the thread twisting mechanism comprises a thread twisting shaft, a gear assembly and a rack assembly, the gear assembly is connected with the thread twisting shaft, the rack assembly is meshed with the gear assembly, and the gear assembly is driven to rotate and drives the thread twisting shaft to rotate.

2. The back mold threading and depoling injection mold according to claim 1, characterized in that: and the first rear die core block and the second rear die core block are respectively provided with a groove and a convex block which are matched with each other on the abutting surfaces abutted against each other.

3. The back mold threading and depoling injection mold according to claim 1, characterized in that: the rear die assembly comprises a base, a rear die seat plate, a gear seat plate and a rear template which are sequentially arranged from back to front, and the front die assembly comprises a panel, a hot runner plate and a front template which are sequentially arranged from front to back; the gear assembly comprises a driving wheel, a first gear coaxially connected with the driving wheel and a driven gear meshed with the first gear, and the tooth twisting shaft is arranged on the driven gear; the rack component comprises a rack and a driving oil cylinder, the driving oil cylinder is connected with the rack, the driving oil cylinder is fixedly arranged on one side of the rear mold base plate, a mounting groove for the rack to be mounted and a driving wheel to be mounted is formed in the rear mold base plate, and the first gear and the driven gear are mounted on the gear base plate.

4. The back mold threading and depoling injection mold according to claim 3, characterized in that: the buckling machine assembly comprises a first pull rod, a second pull rod and a buckling machine base, the buckling machine base is fixedly arranged on one side of the rear template, a sliding block and an elastic piece are arranged in the buckling machine base, the elastic piece is arranged between the inner side of the buckling machine base and the sliding block, and a through hole is formed in the middle of the sliding block; the front end of the first pull rod is connected with the front template, the first pull rod penetrates through a through hole in the middle of the sliding block, and the rear end of the first pull rod is provided with a clamping block for clamping with the sliding block; the rear end of the second pull rod is connected with the gear seat plate, the front end of the second pull rod is provided with a guide block, the guide block of the second pull rod is driven to abut against the sliding block through the backward movement of the second pull rod, the elastic part is compressed, and the sliding block is driven to move laterally.

5. The back mold threading and depoling injection mold according to claim 3, characterized in that: the rear mold core further comprises a first guide sliding block and a second guide sliding block which are obliquely arranged, a first guide hole for the first guide sliding block to correspondingly insert is formed in the first rear mold core block, a second guide hole for the second guide sliding block to correspondingly insert is formed in the second rear mold core block, the front ends of the first guide sliding block and the second guide sliding block are fixed on a front template of the front mold assembly, the front template is driven to move forwards, and the first guide sliding block and the second guide sliding block are driven to move forwards, so that the first rear mold core block and the second rear mold core block move towards the directions far away from each other along the oblique directions of the first guide sliding block and the second guide sliding block respectively.

6. The back mold threading and depoling injection mold according to claim 5, wherein: the number of the first guide slide blocks and the number of the second guide slide blocks are two, and the first guide slide blocks and the second guide slide blocks are symmetrically arranged on two sides of the first rear die core block and two sides of the second rear die core block respectively.

7. The rear die-threading and depoling injection mold according to claim 3, characterized in that: the injection molding cavity can be used for injection molding of four products, the number of the thread forming shafts and the number of the slave gears are four, two slave gears adjacent to the first gear are directly meshed with the first gear, and the other two slave gears far away from the first gear are meshed with the adjacent slave gears through the second gear so as to be indirectly meshed with the first gear.

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