CN212653785U - Double-color injection mold with automatic core replacing structure - Google Patents

Abstract

The utility model relates to a double-colored injection mold with automatic core changing structure, which belongs to the technical field of injection molds and comprises a front mold and a rear mold, wherein a core changing device is arranged on the rear mold and comprises a core groove, a sliding plate, a driving oil cylinder and a connecting piece, the sliding plate is respectively arranged at two sides of the driving oil cylinder and fixedly connected with the rear mold, and the core groove is arranged at one side of the sliding plate, which is deviated from the driving oil cylinder, and is jointed with the sliding plate; a sliding groove is vertically formed in one side, close to the sliding plate, of the core groove, a sliding rail is formed in one side, close to the core groove, of the sliding plate, a base is arranged inside the core groove, one end, close to the sliding groove, of the base is fixedly connected with a sliding rod, and the sliding rod penetrates through the sliding groove and is inserted into the sliding rail; the connecting piece sets up core slot, drive cylinder connection, the utility model discloses the effect that improves production efficiency has.

Description

Double-color injection mold with automatic core replacing structure

Technical Field

The utility model belongs to the technical field of injection mold's technique and specifically relates to a double-shot injection mold with automatically, trade core structure is related to.

Background

The double-color injection mold is characterized in that two kinds of plastics with different colors and different types are mainly matched by a soft plastic and a hard plastic, and injection molding is performed through a double-color injection molding machine according to a certain sequence, so that the two kinds of plastics are organically combined together to form a complete product, and the double-color injection mold is necessary equipment for the injection molding process.

The existing chinese patent with reference publication number CN101096121B discloses a two-color injection mold, which comprises a front mold, a rear mold, a plurality of sliding blocks located in the front mold, a plurality of sliding blocks located in the rear mold, a plurality of first cavities, a plurality of second cavities, a first hot runner, a second hot runner, at least one first auxiliary runner and at least one second auxiliary runner; the first auxiliary runner connects the first hot runner with a plurality of first cavities and is used for feeding each first cavity; the second auxiliary flow channel connects the second hot runner with a plurality of second cavities together and is used for feeding each second cavity, and the implementation of the invention has the following beneficial effects: the number of the moulds to be manufactured is reduced, and the cost is greatly reduced; the auxiliary flow channel is used, so that the processing is convenient, the next full-automatic production is more favorably carried out, and the production time is saved.

The above prior art solutions have the following drawbacks: when the double-color injection mold is used for injecting soft plastics and hard plastics with different shapes, the front mold and the rear mold need to be opened and changed to the back, and then another kind of plastics is injected, so that the injection molding process is lengthened, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double-colored injection mold with automatically, trade core structure, it has the effect that improves production efficiency.

The utility model aims at realizing through the following technical scheme:

a double-color injection mold with an automatic core changing structure comprises a front mold and a rear mold, wherein a core changing device is arranged on the rear mold and comprises a core groove, a sliding plate, a driving oil cylinder and a connecting piece, the sliding plate is respectively arranged at two sides of the driving oil cylinder and fixedly connected with the rear mold, and the core groove is arranged at one side of the sliding plate, which is far away from the driving oil cylinder, and is attached to the sliding plate; a sliding groove is vertically formed in one side, close to the sliding plate, of the core groove, a sliding rail is formed in one side, close to the core groove, of the sliding plate, a base is arranged inside the core groove, one end, close to the sliding groove, of the base is fixedly connected with a sliding rod, and the sliding rod penetrates through the sliding groove and is inserted into the sliding rail; the connecting piece connects the core groove and the driving oil cylinder.

Through adopting the above technical scheme, when using this double-colored injection mold with automatic core structure of trading, install mould benevolence on the base of core groove bottom, actuating cylinder promotes the connecting piece, the connecting piece drives the core groove and removes, the slide bar in the core groove is inserted and is located in the slide rail of slide, the slide rail of slide plays direction and spacing effect to the slide bar, make the core groove at the in-process that removes, the slide bar drives mould benevolence on the base and removes according to established track, realize the automatic core process of trading, need not to realize trading the core operation with front mould and back mould die sinking, reach the effect that improves production efficiency.

The present invention may be further configured in a preferred embodiment as: the connecting piece includes connecting seat and connecting block, and the both ends of connecting seat are fixed continuous with the core groove of driving oil cylinder both sides respectively, and the intermediate position department of connecting seat is arranged in to the connecting block, and driving oil cylinder's piston rod is inserted and is located inside the connecting block and fixed continuous with the connecting block.

Through adopting above-mentioned technical scheme, the connecting seat is connected with the core groove of driving oil cylinder both sides, when using driving oil cylinder to promote the connecting piece, can satisfy the inside mould benevolence in driving oil cylinder both sides core groove and trade the core operation, has improved production efficiency, uses more high-efficient, convenient.

The present invention may be further configured in a preferred embodiment as: the slide rail on the slide is the setting of M type.

Through adopting above-mentioned technical scheme, set up slide rail on the slide to the M type, the one end that the base was kept away from to the slide bar slides in the slide rail, combines the spout on the core groove, and the mould benevolence that drives on the base is done and is kept away from or is close to the intermittent type nature motion of front mould, realizes trading the core operation to mould benevolence, improves the stability and the convenience of trading the core in-process, improves production efficiency.

The present invention may be further configured in a preferred embodiment as: the position department that the connecting seat just faced the slide is provided with the guide bar, and the one end and the slide fixed linking to each other of guide bar, the other end of guide bar pass the connecting seat and with the connecting seat connection of sliding.

Through adopting above-mentioned technical scheme, set up the guide bar between connecting piece and slide, the guide bar has strengthened being connected between connecting piece and the slide on the one hand, has strengthened the stability when the connecting piece drives the core groove and removes, and on the other hand the guide bar plays the effect of direction to the connecting piece, and the reinforcing connecting piece drives the stability and the accuracy of core groove at the core in-process of trading.

The present invention may be further configured in a preferred embodiment as: and a yielding groove for moving the mold core arranged on the base is formed in the position of the front mold, which is opposite to the core groove.

By adopting the technical scheme, the receding groove is formed in the position right facing the core groove, when the driving oil cylinder drives the core groove to move, the receding groove provides a moving space for the mold core in the core groove, core changing operation can be achieved without opening the front mold and the rear mold, production efficiency is improved, and workpiece quality is enhanced.

The present invention may be further configured in a preferred embodiment as: and the rear die is in threaded connection with positioning plates which are arranged at the positions of two sides of the driving oil cylinder.

Through adopting above-mentioned technical scheme, set up the locating plate in the both sides of drive cylinder, two locating plates cooperate and consolidate the drive cylinder, improve the stability of drive cylinder in the use, reinforcing drive cylinder's result of use.

To sum up, the utility model discloses a beneficial technological effect does:

1. by arranging the core replacing device, the core replacing operation can be realized without opening the front die and the rear die, so that the effect of improving the production efficiency is achieved;

2. the core replacing operation of the mold cores in the core grooves on the two sides of the driving oil cylinder can be met by driving the oil cylinder to drive the connecting piece to move the core grooves, so that the production efficiency is improved, and the use is more efficient and convenient;

3. the core groove is formed in the position, opposite to the core groove, of the front mold, the receding groove provides a moving space for a mold core in the core groove, core changing operation can be achieved without opening the front mold and the rear mold, and production efficiency is improved.

Drawings

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

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is a schematic view of the core changer according to the present invention;

fig. 4 is an exploded view of the core changer of the present invention;

FIG. 5 is a schematic view of the slide mechanism according to the present invention;

FIG. 6 is an enlarged partial schematic view of portion B of FIG. 5;

fig. 7 is a partially enlarged schematic view of a portion C in fig. 5.

In the figure, 1, front mould; 11. a yielding groove; 2. a rear mold; 21. an abutting module; 22. a connection module; 23. a support module; 24. a transition module; 241. a guide roller; 242. a card slot; 25. an oil cylinder; 26. a base; 3. adjusting a rod; 31. a first link; 311. a guide groove; 312. a boss; 32. a second link; 321. an auxiliary lever; 33. a third link; 4. a limiting groove; 5. a core changing device; 51. a core groove; 511. a chute; 512. a base; 513. a slide bar; 52. a slide plate; 521. a slide rail; 53. a driving oil cylinder; 54. a connecting member; 541. a connecting seat; 542. connecting blocks; 6. a guide bar; 7. positioning a plate; 8. a slide mechanism; 81. a first row bit assembly; 811. a first limit rod; 82. a second row bit assembly; 821. a locking block; 8211. a slide groove; 822. an elastic member; 8221. a spring; 8222. a spring block; 823. a second limiting rod; 9. and (4) clamping the board.

Detailed Description

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

Referring to fig. 1, for the utility model discloses a double-shot injection mold with automatic core structure that trades, including just to front mould 1 and back mould 2 to the setting, need not to realize trading the core operation with front mould 1 and 2 die sinking of back mould, reach the effect that improves production efficiency.

With reference to fig. 5 and 6, a slide mechanism 8 is disposed at the abutting position of the front mold 1 and the rear mold 2, the slide mechanism 8 is disposed at two opposite sides of the dual-color injection mold, the slide mechanism 8 includes a first slide assembly 81 and a second slide assembly 82 disposed at intervals, as shown in fig. 7, the first slide assembly 81 and the second slide assembly 82 both include a locking block 821 and an elastic member 822, the first slide assembly 81 is further provided with a first limiting rod 811, and the second slide assembly 82 is provided with a second limiting rod 823; the locking block 821 is arranged on the rear die 2 in a sliding mode, a row groove 8211 is formed in the middle of the locking block 821, and the elastic piece 822 is inserted into two opposite sides of the inner wall of the row groove 8211 and connected with the locking block 821 in a sliding mode; the part of the first limiting rod 811 inserted into the row position slot 8211 is in a plate shape, and two sides of the first limiting rod 811 are abutted with one end of the elastic piece 822 far away from the locking block 821; the section that second gag lever post 823 inserts row slot 8211 internal portion is the setting of type of falling T, and second gag lever post 823 forms the joint with the lower surface of elastic component 822.

With reference to fig. 6 and 7, when the slide mechanism 8 is used, the first limiting rod 811 of the first slide assembly 81 and the second limiting rod 823 of the second slide assembly 82 are inserted into the slide slot 8211 of the locking block 821, the first limiting rod 811 and the second limiting rod 823 have a limiting and fixing effect on the locking block 821, when the first limiting rod 811 and the second limiting rod 823 are inserted into the slide slot 8211, the first limiting rod 811 and the second limiting rod 823 compress the elastic members 822 on two sides of the slide slot 8211, the elastic members 822 slide toward the inside of the locking block 821, so that the first limiting rod 811 and the second limiting rod 823 enter the slide slot 8211 and fix the locking block 821, then the elastic members 822 slide out of the inside of the locking block 821 to fix the first limiting rod 811 and the second limiting rod 823, the cross section of the second limiting rod 823 is in an inverted T shape, two sides of the second limiting rod 823 are in a snap-fit with the lower surface of the elastic members 822, the connection between the front die 1 and the rear die 2 is strengthened, the effect of improving the connection stability between the front die 1 and the rear die 2 is achieved, and the processing quality of the workpiece is improved.

Referring to fig. 7, the elastic member 822 includes a spring 8221 (not shown) and a spring block 8222, the spring 8221 is inserted into the locking block 821, one end of the spring 8221 is fixedly connected to the locking block 821, the other end of the spring 8221 is fixedly connected to the spring block 8222, the spring block 8222 is inserted into one side of the locking block 821 close to the row slot 8211 and connected to the locking block 821 in a sliding manner, when the elastic member 822 is used, the spring block 8222 of the elastic member 822 is pressed, the spring 8221 at the bottom of the spring block 8222 deforms, the spring block 8222 compresses the spring 8221 and slides towards the inside of the locking block 821, so that the first limiting rod 811 and the second limiting rod 823 pass through the elastic member 822 to reach the inside of the row slot 8211; when the first limiting rod 811 and the second limiting rod 823 are abutted against the inner wall of the row slot 8211, the pressure on the elastic block 8222 disappears, the restoring force of the spring 8221 pushes the elastic block 8222 to slide outwards, the elastic block 8222 forms clamping connection with the first limiting rod 811 and the second limiting rod 823, the use stability of the first limiting rod 811 and the second limiting rod 823 is enhanced, and the use effect of the elastic piece 822 is enhanced; the lower surface of the second limiting rod 823 is in a curved surface shape, when the second limiting rod 823 extrudes the elastic block 8222, the contact area between the second limiting rod 823 and the elastic block 8222 is reduced by the second limiting rod 823 in the curved surface shape, friction between the second limiting rod 823 and the elastic block 8222 is reduced, the second limiting rod 823 conveniently penetrates through the elastic block 8222 to reach the bottom of the row slot 8211, convenience in matching the second limiting rod 823 with the locking block 821 is improved, and use is more efficient; the upper surface of the elastic block 8222 is curved, so that the resistance of the second limiting rod 823 when contacting with the elastic block 8222 is further reduced, the second limiting rod 823 is conveniently inserted into the row groove 8211, and the use effect of the second row component 82 is enhanced; one side of bullet piece 8222 and second gag lever post 823 butt is the inclined plane form setting with second gag lever post 823 looks adaptation, inserts when second gag lever post 823 and locates inside the interior back of line slot 8211, and bullet piece 8222 lower surface and second gag lever post 823 butt increase the area of contact between bullet piece 8222 and the second gag lever post 823, improve the fixed effect of bullet piece 8222 to second gag lever post 823.

Referring back to fig. 6, the position department rigid coupling that the front mould 1 just is the latch segment 821 has cardboard 9, the inner wall of cardboard 9 is the inclined plane setting, the latch segment 821 just sets up with cardboard 9 inner wall butt to one side of cardboard 9, cardboard 9 and latch segment 821 butt and play fixed effect to latch segment 821, cardboard 9 cooperates first gag lever post 811, second gag lever post 823 is fixed front mould 1 and back mould 2, further strengthen the connection stability between front mould 1 and the back mould 2, the production quality and the efficiency of work piece are improved.

With reference to fig. 1 and 2, the rear mold 2 includes an abutting module 21, a connecting module 22, a supporting module 23, a transition module 24, an oil cylinder 25 and a base 26, and the abutting module 21, the connecting module 22, the supporting module 23, the transition module 24, the oil cylinder 25 and the base 26 are sequentially arranged in a direction away from the front mold 1; the outer surface of the rear die 2 is obliquely provided with an adjusting rod 3, the bottom end of the adjusting rod 3 is hinged with an oil cylinder 25, the top of the adjusting rod 3 is hinged with a connecting module 22, when the front die 1 and the rear die 2 need to be opened, the oil cylinder 25 on the rear die 2 is started, the oil cylinder 25 drives the rear die 2 to move towards the direction far away from the front die 1 through the adjusting rod 3, two ends of the adjusting rod 3 are respectively connected with the oil cylinder 25 and the connecting module 22, and the stability of the rear die 2 in the moving process is enhanced; when the front mold 1 and the rear mold 2 need to be closed, the oil cylinder 25 pushes the adjusting rod 3 to drive the rear mold 2 to abut against the front mold 1, the adjusting rod 3 accelerates the pushing speed of the oil cylinder 25 to the connecting module 22, the mold closing process of the rear mold 2 and the front mold 1 is accelerated, and the separating and closing speed of the front mold 1 and the rear mold 2 is improved; the position department that back mould 2 corresponds regulation pole 3 inwards caves in and forms spacing groove 4, and spacing groove 4 is the form setting that enlarges gradually to the top by the bottom, adjusts pole 3 and arranges spacing groove 4 in and rotate in spacing groove 4, and the inner wall of spacing groove 4 has good limiting displacement to regulation pole 3, prevents to adjust the condition that pole 3 misplaced in the use, improves the stability in use of adjusting pole 3.

With reference to fig. 1 and 2, the adjusting rod 3 includes a first connecting rod 31, a second connecting rod 32 and a third connecting rod 33, the bottom of the first connecting rod 31 is hinged to the oil cylinder 25, and the top of the first connecting rod 31 is inserted into the bottom of the second connecting rod 32 and is hinged to the second connecting rod 32; the top end of the second connecting rod 32 is inserted into the bottom end of the third connecting rod 33 and hinged with the third connecting rod 33, the top end of the third connecting rod 33 is rotatably connected with the connecting module 22, and the first connecting rod 31, the second connecting rod 32 and the third connecting rod 33 are matched with each other to adjust the position relation among the front mold 1, the rear mold 2 and the rear mold 2, so that the separating and closing speed of the front mold 1 and the rear mold 2 is obviously improved, and the production speed is accelerated; an auxiliary rod 321 is arranged at the abutting position of the first link 31 and the second link 32, the auxiliary rod 321 is arranged by penetrating through the first link 31 and the second link 32, the auxiliary rod 321 is arranged at one side of the hinge shafts of the first link 31 and the second link 32, which is close to the first link 31, the auxiliary rod 321 further strengthens the connection between the first link 31 and the second link 32, and improves the connection stability between the first link 31 and the second link 32; and the articulated shaft of auxiliary rod 321 and first connecting rod 31, second connecting rod 32 is sharp setting, and auxiliary rod 321 plays spacing effect to first connecting rod 31 and second connecting rod 32, prevents to take place the pivoted condition between first connecting rod 31 and the second connecting rod 32, improves the supporting role of first connecting rod 31 cooperation second connecting rod 32 to third connecting rod 33, further strengthens the result of use of connecting rod.

Referring to fig. 2, a guide groove 311 is formed in the first connecting rod 31, the guide groove 311 is arranged at the position of the transition module 24, a guide roller 241 is fixedly connected to the position of the transition module 24 corresponding to the guide groove 311, the guide roller 241 penetrates through the guide groove 311 and is connected with the guide groove 311 in a sliding manner, the oil cylinder 25 operates the adjusting rod 3 to drive the rear mold 2 to move, the guide roller 241 on the transition module 24 is clamped with the guide groove 311 on the first connecting rod 31, the guide roller 241 plays a guiding role in guiding the guide groove 311, and then the first connecting rod 31 is adjusted to be matched with the second connecting rod 32 to jack up the third connecting rod 33, so that the matching effect of the first connecting rod 31, the second connecting rod 32 and the third connecting rod 33 is realized, the use effect of the adjusting rod 3 is further enhanced, the separating and closing speeds of the front mold 1 and the rear mold 2 are improved; the middle position of the guide roller 241 is inwards recessed to form a clamping groove 242, a boss 312 is fixedly connected to the position, corresponding to the clamping groove 242, of the guide groove 311, the boss 312 is inserted into the clamping groove 242 and clamped with the clamping groove 242, when the guide roller 241 is matched with the guide groove 311 for use, the clamping groove 242 on the guide roller 241 is clamped with the boss 312 inside the guide groove 311, the guide roller 241 slides along the boss 312 in the guide groove 311, dislocation or clamping of the guide roller 241 in the moving process is prevented, the use stability of the guide groove 311 matched with the guide roller 241 is improved, and the use effect of the adjusting rod 3 is further enhanced.

With reference to fig. 3 and 4, a core changing device 5 is arranged at the middle position of the support module 23, the core changing device 5 includes a core groove 51, a sliding plate 52, a driving oil cylinder 53 and a connecting piece 54, two ends of the driving oil cylinder 53 are in threaded connection with positioning plates 7 for improving the use stability of the driving oil cylinder 53, the sliding plates 52 are respectively arranged at two sides of the driving oil cylinder 53 and fixedly connected with the rear mold 2, and the core groove 51 is arranged at one side of the sliding plate 52 departing from the driving oil cylinder 53 and is attached to the sliding plate 52; a sliding groove 511 is vertically formed in one side, close to the sliding plate 52, of the core groove 51, a sliding rail 521 is formed in one side, close to the core groove 51, of the sliding plate 52, the sliding rail 521 on the sliding plate 52 is arranged in an M shape, a base 512 is arranged inside the core groove 51, a sliding rod 513 is fixedly connected to one end, close to the sliding groove 511, of the base 512, and the sliding rod 513 penetrates through the sliding groove 511 and is inserted into the sliding rail 521; the core groove 51 and the driving oil cylinder 53 are connected by the connecting piece 54, when the core changing machine is used, the mold core is arranged on the base 512 at the bottom of the core groove 51, the driving oil cylinder 53 pushes the connecting piece 54, the connecting piece 54 drives the core groove 51 to move, the sliding rod 513 in the core groove 51 is inserted in the sliding rail 521 of the sliding plate 52, and the sliding rail 521 of the sliding plate 52 plays a role in guiding and limiting the sliding rod 513, so that in the moving process of the core groove 51, the sliding rod 513 drives the mold core on the base 512 to move according to a preset track, and the mold core on the base 512 makes intermittent movement far away from or close to the front mold 1, thereby realizing the automatic core changing process, improving the stability and convenience in the core changing process and improving the production efficiency; the front mold 1 is provided with a yielding groove 11 for the mold core arranged on the base 512 to move at the position opposite to the core groove 51, when the driving oil cylinder 53 drives the core groove 51 to move, the yielding groove 11 provides a moving space for the mold core in the core groove 51, the core changing operation can be realized under the condition that the front mold 1 and the rear mold 2 are not required to be opened, the production efficiency is improved, and the workpiece quality is enhanced.

Referring to fig. 4, the connecting member 54 includes a connecting seat 541 and a connecting block 542, two ends of the connecting seat 541 are respectively fixedly connected with the core grooves 51 at two sides of the driving oil cylinder 53, the connecting block 542 is disposed at a middle position of the connecting seat 541, a piston rod of the driving oil cylinder 53 is inserted into the connecting block 542 and is fixedly connected with the connecting block 542, when the driving oil cylinder 53 is used to push the connecting member 54, core changing operation of the mold cores inside the core grooves 51 at two sides of the driving oil cylinder 53 can be satisfied, production efficiency is improved, and use is more efficient and convenient; the position department that connecting seat 541 is just to slide 52 is provided with guide bar 6, the one end and the slide 52 of guide bar 6 are fixed continuous, the other end of guide bar 6 passes connecting seat 541 and is connected with connecting seat 541 slides, guide bar 6 has strengthened being connected between connecting piece 54 and the slide 52 on the one hand, stability when connecting piece 54 drives core slot 51 and removes has been strengthened, on the other hand guide bar 6 plays the effect of direction to connecting piece 54, reinforcing connecting piece 54 drives core slot 51 and trades stability and accuracy of core in-process.

The implementation principle of the embodiment is as follows: when the double-color injection mold is used for producing a workpiece, firstly, hard plastic is injected into the abutted front mold 1 and the abutted rear mold 2, then the abutted mold plate and the connecting mold plate are pulled apart for a certain distance, so that the front mold 1 is opened in a slide way, the insert of the rear mold 2 is separated from the core of the rear mold 2, then the oil cylinder 25 pushes the transition module 24, the guide roller 241 on the transition module 24 pushes the adjusting rod 3 to be opened, and the adjusting rod 3 operates the front mold 1 and the rear mold 2 to be separated; then, the driving oil cylinder 53 is operated, the driving oil cylinder 53 pushes the connecting piece 54 to drive the core slot 51 to perform core changing operation, so that the injection molding of the hard plastic on the semi-finished workpiece is facilitated, and the manipulator can synchronously take out the injection molded finished workpiece in the process; and finally, the oil cylinder 25 is pushed to close the die, and the circular operation is carried out.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (6)

1. The utility model provides a double-shot injection mold with automatically, trade core structure, includes front mould (1) and back mould (2), its characterized in that: the core replacing device (5) is arranged on the rear die (2), the core replacing device (5) comprises core grooves (51), sliding plates (52), driving oil cylinders (53) and connecting pieces (54), the sliding plates (52) are respectively arranged on two sides of the driving oil cylinders (53) and fixedly connected with the rear die (2), and the core grooves (51) are arranged on one side, away from the driving oil cylinders (53), of the sliding plates (52) and are attached to the sliding plates (52); a sliding groove (511) is vertically formed in one side, close to the sliding plate (52), of the core groove (51), a sliding rail (521) is formed in one side, close to the core groove (51), of the sliding plate (52), a base (512) is arranged inside the core groove (51), a sliding rod (513) is fixedly connected to one end, close to the sliding groove (511), of the base (512), and the sliding rod (513) penetrates through the sliding groove (511) and is inserted into the sliding rail (521); the core groove (51) and the driving oil cylinder (53) are connected by a connecting piece (54).

2. The double-shot injection mold with the automatic core-changing structure of claim 1, wherein: the connecting piece (54) includes connecting seat (541) and connecting block (542), and the both ends of connecting seat (541) are fixed continuous with core groove (51) of drive hydro-cylinder (53) both sides respectively, and the intermediate position department of connecting seat (541) is arranged in connecting block (542), and the piston rod of drive hydro-cylinder (53) is inserted and is located inside connecting block (542) and fixed continuous with connecting block (542).

3. The double-shot injection mold with the automatic core-changing structure of claim 1, wherein: the sliding rail (521) on the sliding plate (52) is arranged in an M shape.

4. The double-shot injection mold with the automatic core-changing structure of claim 2, wherein: the position of the connecting seat (541) opposite to the sliding plate (52) is provided with a guide rod (6), one end of the guide rod (6) is fixedly connected with the sliding plate (52), and the other end of the guide rod (6) penetrates through the connecting seat (541) and is connected with the connecting seat (541) in a sliding mode.

5. The double-shot injection mold with the automatic core-changing structure of claim 1, wherein: and a yielding groove (11) for moving the mold core arranged on the base (512) is formed in the position, opposite to the core groove (51), of the front mold (1).

6. The double-shot injection mold with the automatic core-changing structure of claim 1, wherein: and the rear die (2) is in threaded connection with positioning plates (7), and the positioning plates (7) are arranged at the positions of two sides of the driving oil cylinder (53).

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