CN219006859U - Thread core-pulling demolding structure, thread core-pulling mold and injection molding equipment - Google Patents

Abstract

The application relates to the technical field of injection molding, and in particular relates to a threaded core-pulling demolding structure, a threaded core-pulling mold and injection molding equipment. The second fixed plate is fixedly arranged on the frame and positioned at the lower side of the first fixed plate. The bottom end of the reciprocating rod is fixedly arranged on the second fixing plate, and the top end of the reciprocating rod passes through a through hole arranged on the first fixing plate. The large gear is rotatably arranged in a large rotating groove on the top surface of the first fixed plate, and the reciprocating lever is installed in the installation hole of the large gear in a matched mode. The first end of the gear shaft is rotatably arranged in the small rotating groove of the first fixing plate, and the second end of the gear shaft is fixedly connected with the threaded loose core coaxially. The demolding force of the front template leaving the rear template during demolding is converted into a rotating force for driving the threaded core to rotate, so that the threaded core is screwed out of the internal threads formed by the workpiece, the limitation of a thread sleeve is not needed, and the workpiece is prevented from being damaged due to poor coaxial positioning precision of the thread sleeve and the workpiece.

Description

Thread core-pulling demolding structure, thread core-pulling mold and injection molding equipment

Technical Field

The application relates to the technical field of injection molding, and more particularly relates to a threaded core-pulling demolding structure, a threaded core-pulling mold and injection molding equipment.

Background

Injection molding is a common way of workpiece manufacture, particularly in medical instruments and medical consumables, and for some internally threaded workpieces, thread core pulling injection molding is a common way. And placing the threaded core pulling device between the front template and the rear template, and filling the workpiece molten liquid to enable the workpiece molten liquid to cover the core pulling device. And after the workpiece is solidified and formed, opening the front template, and extracting the thread core to finish machining.

The mode of drawing out the screw thread and loosing core at present often is with the coaxial fixed connection pivot of the one end that the screw thread is loosed core and is kept away from the work piece, presets the external screw thread in the pivot and is connected with fixed silk shell cooperation, provides the rotation force for the pivot this moment for the pivot rotates in the silk shell, thereby drives the screw thread and looses core and rotate and draw out. When the coaxial precision of the screw sleeve and the workpiece is poor, the matching degree of the external thread of the screw core pulling during rotation and the internal thread formed by the workpiece is poor, so that the internal thread formed by the workpiece is easy to damage under the limitation of the screw sleeve.

Disclosure of Invention

In order to overcome the problems existing in the related art to at least a certain extent, the purpose of the application is to provide a thread core-pulling demolding structure, which can solve the problem that the workpiece is damaged easily due to poor coaxial precision of a thread sleeve and the workpiece during the existing thread core-pulling demolding. The preferred technical solutions of the technical solutions provided in the present application can produce a number of technical effects described in detail below.

The application provides a screw thread drawing of core drawing of patterns structure, include:

the first fixing plate is arranged on the lower side of the rear template and can synchronously move with the front template;

the second fixing plate is arranged on the lower side of the first fixing plate and fixedly arranged on the frame;

the bottom end of the reciprocating rod is fixedly arranged on the second fixing plate, a through hole is formed in the first fixing plate, and the top end of the reciprocating rod penetrates through the through hole;

the gear wheel, set up big groove on the top surface of first fixed plate, the gear wheel rotates and sets up in the big groove that changes, the complex lever cooperation is installed in the mounting hole that sets up on the gear wheel.

The gear shaft, set up the small rotary groove on the top surface of first fixed plate, the first end rotation of gear shaft sets up in the small rotary groove, the coaxial fixed connection of second end and screw thread loose core of gear shaft.

Optionally, a rotating hole is arranged on the bottom surface of the small rotating groove in a penetrating mode, and the second end of the gear shaft can penetrate out of the rotating hole.

Optionally, a gasket is embedded on the top surface of the second fixing plate, and the gasket can prop against the second end of the gear shaft.

Optionally, further comprising; a connection structure, the connection structure comprising:

the connecting block is fixedly arranged on the side wall of the first fixing plate, and a first sliding hole is vertically formed in the connecting block;

the sliding block is provided with a perforation, the inner side walls of the two sides of the first sliding hole are respectively provided with a sliding groove and a through groove, the first end of the sliding block stretches into the sliding groove, the second end of the sliding block stretches out of the through groove, and the sliding block can slide from a first state to a second state;

the first connecting rod, set up first arch on the lateral wall of first connecting rod bottom, the top of first connecting rod passes after the perforation fixed connection front bezel 26, when the slider is in the first state, protruding top of first can with the slider offsets, when the slider is in the second state, first arch can pass the perforation.

Optionally, the first end of the sliding block is connected with the bottom of the sliding groove through an elastic piece, an inclined plane is arranged on the bottom surface of the first bulge, and an inclined plane is arranged on the top side of the inner wall of the perforation close to the second end of the sliding block.

Optionally, the connection structure further includes:

the second connecting rod, the vertical second slide opening that sets up on the connecting block, logical groove intercommunication the second slide opening, set up the second arch on the lateral wall on second connecting rod top, the bottom of second connecting rod can pass fixed connection behind the second slide opening the second fixed plate, when the slider is in first state, the bellied top of second can with the slider offsets, when the slider is in the second state, the second arch can pass the second slide opening.

Optionally, the bottom surface and the top surface of the second protrusion are both provided with inclined planes, and the upper side and the lower side of the second end of the sliding block are both provided with inclined planes.

Optionally, a guide post is fixedly arranged on the top surface of the second fixing plate, a guide perforation is arranged on the first fixing plate, and the guide post penetrates through the guide perforation and then sequentially penetrates through preset guide holes on the rear template and the front template.

The application provides a threaded core-pulling mold, which comprises the threaded core-pulling demolding structure.

The application provides injection molding equipment, including the screw thread drawing of core drawing of patterns structure or screw thread drawing of core mould as described above arbitrary.

The technical scheme that this application provided can include following beneficial effect:

the demolding force of the front template leaving the rear template during demolding is converted into a rotating force for driving the threaded core to rotate, so that the threaded core is screwed out of the internal threads formed by the workpiece, the limitation of a thread sleeve is not needed, and the workpiece is prevented from being damaged due to poor coaxial positioning precision of the thread sleeve and the workpiece.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a threaded core-pulling mold shown according to some example embodiments;

FIG. 2 is a schematic diagram of a threaded loose core mold hidden front mold plate shown according to some example embodiments;

FIG. 3 is a schematic view of a threaded core-pulling mold hiding front and rear templates according to some example embodiments;

FIG. 4 is a schematic view of a first securing plate of a threaded core-pulling stripper structure shown according to some exemplary embodiments;

FIG. 5 is a schematic view of a second securing plate of a threaded core-pulling stripper structure shown according to some exemplary embodiments;

FIG. 6 is a schematic diagram of a large gear of a threaded core-pulling demolding structure shown according to some example embodiments;

FIG. 7 is a schematic view of a gear shaft illustrating a threaded core-pulling and demolding structure according to some example embodiments;

FIG. 8 is a schematic diagram of a connection structure of a threaded core-pulling demolding structure shown according to some example embodiments;

FIG. 9 is a schematic view of a first connection rod of the connection structure shown in accordance with some example embodiments;

FIG. 10 is a second connecting rod schematic diagram of a connecting structure shown according to some example embodiments;

FIG. 11 is a schematic view of a connection block mounting slider of the connection structure shown according to some example embodiments;

FIG. 12 is a schematic view of a connection block concealing slider of the connection structure shown according to some example embodiments;

FIG. 13 is a schematic illustration of a slider of the connection structure shown according to some example embodiments.

In the figure: 1. a first fixing plate; 2. a second fixing plate; 3. a reciprocating lever; 4. a through hole; 5. a large gear; 6. a gear shaft; 7. a large rotating groove; 8. a small rotating groove; 9. a through hole; 10. a gasket; 11. a first connecting rod; 12. a first protrusion; 13. a connecting block; 14. a first slide hole; 15. a slide block; 16. a chute; 17. perforating; 18. a second slide hole; 19. a through groove; 20. a second connecting rod; 21. a second protrusion; 22. guiding perforation; 23. a guide post; 24. screw thread core pulling; 25. a workpiece; 26. a front template; 27. and a rear template.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

Hereinafter, embodiments will be described with reference to the drawings. Furthermore, the embodiments shown below do not limit the summary of the utility model described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the utility model described in the claims.

Referring to fig. 1-13, the present embodiment provides a threaded core-pulling demolding structure, including: the device comprises a first fixing plate 1, a second fixing plate 2, a reciprocating rod 3, a large gear 5 and a gear shaft 6. Wherein the second fixing plate 2 is fixedly provided on the frame below the rear mold plate 27. The first fixing plate 1 is disposed between the rear mold plate 27 and the second fixing plate 2.

Wherein the bottom end of the reciprocating rod 3 is fixedly arranged on the second fixed plate 2, and the first fixed plate 1 is provided with a through hole 4 for the reciprocating rod 3 to pass through. The first fixing plate 1 is further provided with a large rotary groove 7, so that the large rotary groove 7 is coaxial with the through hole 4, namely, the through hole 4 is positioned at the bottom of the large rotary groove 7. The first fixing plate 1 is further provided with a small rotating groove 8, so that the small rotating groove 8 is positioned on the outer side edge of the large rotating groove 7 and is communicated with the large rotating groove 7.

The large gear 5 is provided with a mounting hole matched with the reciprocating rod 3, and after the large gear 5 is placed in the large rotary groove 7, the reciprocating rod 3 passes through the through hole 4 and then is matched with the mounting hole and passes through the mounting hole. The rear template 27 is provided with a rotating hole for the top end of the restoring rod 3 to pass through the rear template 27 after passing through the mounting hole. Thus, when the first fixed plate 1 moves away from the second fixed plate 2, the large gear 5 rotates.

After the second end of the gear shaft 6 is fixedly connected with the threaded core pulling 24 in a coaxial manner, the second end of the gear shaft 6 is rotatably arranged in the small rotary groove 8, and the large gear 5 is meshed with the gear shaft 6.

The first fixing plate 1 is connected with the front template 26 so that the front template 26 can drive the first fixing plate 1 to move together. So set up, after the second fixed plate 2 is fixed in the frame, laminate the bottom surface of first fixed plate 1 with the top surface of second fixed plate 2, laminate the bottom surface of back template 27 with the top surface of first fixed plate 1, with preceding template 26 lock to back template 27, the screw thread core 24 inserts between preceding mould benevolence and the back mould benevolence of preceding template 26 this moment. After injection molding, the workpiece 25 is coated with the threaded core-pulling 24, and at this time, the front template 26 is pulled upwards by using a demolding device, and the first fixing plate 1 is driven to move upwards. When the first fixing plate 1 moves upwards, the reciprocating rod 3 moves downwards relative to the large gear 5, so that the large gear 5 rotates, the large gear 5 drives the gear shaft 6 to rotate, the threaded core-pulling 24 rotates and is screwed out of the workpiece 25, and the threaded core-pulling 24 is separated from the workpiece 25. By means of the arrangement, the thread formed by the workpiece 25 is screwed out of the thread core pulling 24, the restriction of the tooth socket is avoided, and the workpiece 25 is prevented from being damaged due to the fact that the coaxial positioning precision of the tooth socket and the workpiece 25 is poor.

Wherein, the guide post 23 is vertically fixed on the top surface of the second fixing plate 2, the guide perforation 22 is arranged on the first fixing plate 1, and the guide post 23 passes through the guide perforation 22 and then sequentially passes through the preset guide holes on the rear template 27 and the front template 26. The front template 26, the rear template 27 and the first fixing plate 1 can all be moved in the vertical direction only with respect to the second fixing plate 2 under the action of the guide posts 23.

As an alternative embodiment, a through hole 9 is provided through the bottom surface of the small rotary groove 8 such that the through hole 9 penetrates the bottom surface of the first fixing plate 1, and when the gear shaft 6 is rotatably provided in the small rotary groove 8, the second end of the gear shaft 6 penetrates the through hole 9. After the bottom surface of the first fixing plate 1 is attached to the top surface of the second fixing plate 2, the gear shaft 6 is jacked up, and the threaded core pulling 24 just rises to the injection molding position. At the time of demolding, the front mold plate 26 is pulled upward using the demolding device while the first fixing plate 1 is driven to move upward. When the first fixing plate 1 moves upwards, the reciprocating rod 3 moves downwards relative to the large gear 5, so that the large gear 5 rotates, the large gear 5 drives the gear shaft 6 to rotate, the threaded core-pulling 24 rotates and is screwed out of the workpiece 25, and the threaded core-pulling 24 is separated from the workpiece 25. At this time, the gear shaft 6 gradually moves downward, and the second end of the gear shaft 6 passes through the through hole 9 and again passes through the through hole 9. When carrying out the injection molding next time, can jack up gear shaft 6 with the laminating of the bottom surface of first fixed plate 1 and the top surface of second fixed plate 2 and make screw thread core 24 reset, it is more convenient to reset, has increased efficiency.

In some embodiments, the gasket 10 is embedded on the top surface of the second fixing plate 2, so that after the bottom surface of the first fixing plate 1 is attached to the top surface of the second fixing plate 2, the second end of the gear shaft 6 abuts against the gasket 10, and the gear shaft 6 is reset through the gasket 10, so that the connection is more reliable.

As to the front form 26, the first fixing plate 1 can be moved together, and as an alternative embodiment, a connection structure including a connection block 13, a slider 15 and a first connection rod 11 is further included. Wherein the connection block 13 is fixedly provided on a side wall of the first fixing plate 1. The connecting block 13 is vertically provided with a first sliding hole 14, so that the first sliding hole 14 penetrates through the upper side and the lower side of the connecting block 13. Wherein the width of the first sliding hole 14 should be larger than the width of the first connecting rod 11 to ensure that the first connecting rod 11 can pass through the first sliding hole 14.

A sliding groove 16 is formed in one side inner wall of the first sliding hole 14, a through groove 19 is formed in the opposite side inner wall, and a through hole 17 is formed in the sliding block 15, so that the through hole 17 penetrates through the upper side and the lower side of the sliding block 15 vertically. The first end of the slide 15 is extended into the slide slot 16 and the second end of the slide 15 is extended out of the through slot 19, at which time the slide 15 is slidable between the first and second states.

The first protrusion 12 is disposed on the side wall of the bottom end of the first connecting rod 11, and the top end of the first connecting rod 11 is fixedly connected to the front template 26 after passing through the through hole 17. The first protrusion 12 is located on the side wall of the first connecting rod 11 near the chute 16. Wherein the width of the through hole 17 is larger than the width of the first connecting rod 11 plus the first protrusion 12 to ensure that the first connecting rod 11 can pass through the through hole 17.

When the sliding block 15 slides between the first state and the second state, when the sliding block 15 is in the first state, a certain distance exists between the side wall of the through hole 17, which is close to the sliding groove 16, and the sliding groove 16, so that the top end of the first protrusion 12 can abut against the bottom side of the sliding block 15, and the front template 26 can be moved upwards to drive the first fixing plate 1 to move together. When the slider 15 is in the second state, the side wall of the through hole 17 close to the chute 16 is flush with the notch of the chute 16, and at this time, the first protrusion 12 can pass through the through hole 17, so that the front template 26 moves upwards and cannot drive the first fixing plate 1 to move together.

So set up, during the drawing of patterns, will be in first state with slider 15 earlier, use drawing of patterns device to pull front template 26 upwards, drive first fixed plate 1 to upwards remove simultaneously. Until the threaded core-pulling 24 is disengaged from the workpiece 25. At this point, slide 15 is in the second state and stripper means is used to continue to pull front form 26 upward to pull front form 26 away from rear form 27. At this time, the first fixing plate 1 and the rear mold plate 27 move under the action of gravity, and the threaded core-pulling 24 ejects the workpiece 25 out of the rear mold plate 27.

As an alternative embodiment, the first end of the slide 15 is connected to the bottom of the slot 16 by an elastic element, wherein the elastic element is a spring. When the slide 15 is pressed against the slide 16 to the second state, the spring is compressed, and after releasing the slide 15, the spring pushes the slide 15 back to the first state. A slope is provided on the bottom surface of the first protrusion 12 and a slope is provided on the top side of the inner wall of the through hole 17 near the second end of the slider 15. When the front die plate 26 is moved downward, the first connecting rod 11 is inserted into the first slide hole 14 until the inclined surface of the bottom surface of the first protrusion 12 contacts the inclined surface of the top end of the inner wall of the through hole 17. At this time, the front template 26 is continuously moved downwards, the first protrusion 12 presses the sliding block 15 towards the sliding groove 16, the spring is compressed, when the first protrusion 12 completely passes through the through hole 17, the first protrusion 12 does not press the sliding block 15 any more, the spring pushes the sliding block 15 back to the first state, and at this time, the front template 26 is just buckled on the rear template 27.

So set up, first put the slide block 15 in the first state, use the demoulding device to pull the front mould plate 26 upwards, drive the first fixed plate 1 to move upwards at the same time. Until the threaded core-pulling 24 is disengaged from the workpiece 25. At this point, the slide 15 is in the second state, the front die plate 26 is pulled upward by the stripper, the front die plate 26 is pulled away from the rear die plate 27, and the spring pushes the slide 15 back to the first state. When the injection molding process is continued, the front template 26 is moved downwards until the front template is buckled on the rear template 27, so that the operation is more convenient.

As an alternative embodiment, the connection structure further includes: and a second connection rod 20, and a second protrusion 21 is provided on a sidewall of a top end of the second connection rod 20. The second slide hole 18 is vertically arranged on the connecting block 13, so that the through groove 19 is communicated with the second slide hole 18, that is, the second end of the sliding block 15 passes through the through groove 19 and then enters the second slide hole 18.

The bottom end of the second connecting rod 20 passes through the second sliding hole 18 and is fixedly connected with the second fixing plate 2. The second protrusion 21 is located on the side wall of the second connecting rod 20 near the through groove 19. When the slider 15 is in the first state, the second end of the slider 15 penetrates into the second slide hole 18, and the top end of the second protrusion 21 abuts against the slider 15. When the sliding block 15 is in the second state, the second end of the sliding block 15 enters the through groove 19 and leaves the second sliding hole 18, and at this time, the second protrusion 21 can pass through the second sliding hole 18.

Wherein, the bottom surface and the top surface of the second bulge 21 are respectively provided with an inclined surface, and the upper side and the lower side of the second end of the sliding block 15 are respectively provided with an inclined surface. So set up, after the injection molding finishes, promote slider 15 and be in the first state, use shedder to pull front template 26 upwards, drive first fixed plate 1 to upwards remove simultaneously. At this time, the second connecting rod 20 moves downward relative to the connecting block 13 until the inclined surface of the bottom surface of the second protrusion 21 abuts against the inclined surface of the upper side of the second end of the sliding block 15, and at this time, the front template 26 is pulled upward, and the second protrusion 21 pushes the sliding block 15 to slide to the sliding slot 16 to the second state, so that the connection between the first fixing plate 1 and the front template 26 can be disconnected. The operation of pushing the slide block 15 manually is more convenient.

When the first fixing plate 1 is installed, the first fixing plate 1 is moved downwards to be close to the second fixing plate 2, the top end of the second connecting rod 20 stretches into the second sliding hole 18 until the inclined surface of the top surface of the second bulge 21 abuts against the inclined surface of the lower side of the second end of the sliding block 15, the first fixing plate 1 is continuously moved downwards, the second bulge 21 pushes the sliding block 15 to move towards the sliding groove 16, the spring is compressed, at the moment, the second bulge 21 can penetrate through the second sliding hole 18, and after the second bulge 21 leaves the sliding block 15, the spring pushes the sliding block 15 to return to the first state.

The application also provides a thread core-pulling die, which comprises the thread core-pulling demolding structure in the embodiment. The deducing process of the beneficial effects is the same as that brought by the thread core-pulling demoulding structure, so that the description is omitted.

The application also provides injection molding equipment, which comprises the thread core-pulling demolding structure or the thread core-pulling mold in the embodiment. The deducing process of the beneficial effects is the same as that brought by the thread core-pulling demoulding structure, so that the description is omitted.

It should be noted that, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are used herein for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description herein, it should also be noted that the terms "mounted," "connected," "coupled," and "connected," are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to. The multiple schemes provided by the application comprise own basic schemes, are independent of each other and are not mutually restricted, but can be combined with each other under the condition of no conflict, so that multiple effects are achieved together.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. The utility model provides a screw thread drawing of core drawing of patterns structure which characterized in that includes:

the first fixing plate (1) is arranged on the lower side of the rear template, and the first fixing plate (1) can synchronously move with the front template;

the second fixing plate (2) is arranged on the lower side of the first fixing plate (1), and the second fixing plate (2) is fixedly arranged on the frame;

the bottom end of the reciprocating rod (3) is fixedly arranged on the second fixed plate (2), a through hole (4) is formed in the first fixed plate (1), and the top end of the reciprocating rod (3) penetrates through the through hole (4);

the large rotary groove (7) is formed in the top surface of the first fixed plate (1), the large gear (5) is rotatably arranged in the large rotary groove (7), and the reciprocating rod (3) is mounted in a mounting hole formed in the large gear (5) in a matched mode;

the gear shaft (6), set up little change groove (8) on the top surface of first fixed plate (1), the first end rotation of gear shaft (6) sets up in little change groove (8), the second end and the coaxial fixed connection of screw thread loose core of gear shaft (6).

2. The thread core pulling and demolding structure according to claim 1, characterized in that a rotating hole (9) is formed in the bottom surface of the small rotating groove (8) in a penetrating mode, and the second end of the gear shaft (6) can penetrate out of the rotating hole (9).

3. The threaded core-pulling demolding structure according to claim 2, characterized in that a gasket (10) is embedded on the top surface of the second fixing plate (2), and the gasket (10) can be abutted against the second end of the gear shaft (6).

4. The thread core-pulling demolding structure according to claim 1, further comprising; a connection structure, the connection structure comprising:

the connecting block (13) is fixedly arranged on the side wall of the first fixed plate (1), and a first sliding hole (14) is vertically formed in the connecting block (13);

the sliding block (15), a perforation (17) is arranged on the sliding block (15), a sliding groove (16) and a through groove (19) are respectively arranged on the inner side walls of the two sides of the first sliding hole (14), the first end of the sliding block (15) stretches into the sliding groove (16), the second end of the sliding block (15) stretches out of the through groove (19), and the sliding block (15) can slide from a first state to a second state;

the connecting rod comprises a first connecting rod (11), wherein a first bulge (12) is arranged on the side wall of the bottom end of the first connecting rod (11), the top end of the first connecting rod (11) penetrates through a front template (26) fixedly connected with a through hole (17), when the sliding block (15) is in a first state, the top end of the first bulge (12) can prop against the sliding block (15), and when the sliding block (15) is in a second state, the first bulge (12) can penetrate through the through hole (17).

5. The thread drawing of core demoulding structure according to claim 4, characterized in that the first end of the slider (15) is connected with the bottom of the chute (16) through an elastic element, the bottom surface of the first protrusion (12) is provided with an inclined surface, and the top side of the inner wall of the perforation (17) close to the second end of the slider (15) is provided with an inclined surface.

6. The thread take-off and take-off structure of claim 5, wherein the connection structure further comprises:

the second connecting rod (20), vertical second slide opening (18) that sets up on connecting block (13), logical groove (19) intercommunication second slide opening (18), set up second arch (21) on the lateral wall on second connecting rod (20) top, the bottom of second connecting rod (20) can pass behind second slide opening (18) fixed connection second fixed plate (2), slider (15) are in when the first state, the top of second arch (21) can with slider (15) offset, slider (15) are in when the second state, second arch (21) can pass second slide opening (18).

7. The thread drawing of core demoulding structure according to claim 6, wherein the bottom surface and the top surface of the second protrusion (21) are respectively provided with an inclined surface, and the upper side and the lower side of the second end of the sliding block (15) are respectively provided with an inclined surface.

8. The threaded core-pulling demolding structure according to claim 1, wherein a guide pillar (23) is fixedly arranged on the top surface of the second fixing plate (2), a guide perforation (22) is arranged on the first fixing plate (1), and the guide pillar (23) sequentially passes through preset guide holes on the rear mold plate and the front mold plate after passing through the guide perforation (22).

9. A threaded core-pulling mold, characterized by comprising the threaded core-pulling demolding structure as defined in any one of claims 1 to 8.

10. An injection molding apparatus comprising the core-pulling screw mold according to any one of claims 1 to 8 or the core-pulling screw mold according to claim 9.

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