CN210940311U

CN210940311U - Thread back-off core-pulling die

Info

Publication number: CN210940311U
Application number: CN201921880670.1U
Authority: CN
Inventors: 尹立光
Original assignee: Kunshan Simian Precision Mould Co ltd
Current assignee: Kunshan Simian Precision Mould Co ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-07-07
Anticipated expiration: 2029-11-04

Abstract

The utility model relates to the technical field of back-off core-pulling die, and discloses a thread back-off core-pulling die, which solves the problems that the structure of the prior die is complex, the back-off core-pulling can not be completed quickly, and the thread is damaged when the die is easy to be tripped due to vibration during operation, and the quality is poor, and comprises a base, wherein both sides of the upper end of the base are connected with a lower die holder through a support column; through connecting rod and the upper plate that sets up on the bottom plate to and the guide post that sets up on the upper plate, make the motion steady, the effectual motion skew of avoiding causes the problem that the thread damaged, the quality of work piece when having improved the dropout.

Description

Thread back-off core-pulling die

Technical Field

The utility model belongs to the technical field of back-off loose core mould, specifically be a thread back-off loose core mould.

Background

In the injection molding process of the screw teeth, the back-off is required to be released after the screw teeth are molded, so that the mold core is separated.

The existing back-off core pulling mold is complex in structure, the back-off core pulling operation of the screw threads cannot be realized quickly, and when the back-off core pulling is performed, vibration generated by mold movement easily causes tripping, the screw threads are damaged, so that the quality of workpieces is poor.

Disclosure of Invention

To the above situation, for overcoming prior art's defect, the utility model provides a thread back-off core pulling mold, the effectual present mould structure of having solved is complicated, and the back-off is loosed core and can not be accomplished fast to and the mould vibration when operation easily leads to the thread damage when threading off, the relatively poor problem of quality.

In order to achieve the above object, the utility model provides a following technical scheme: a thread back-off core-pulling die comprises a base, wherein both sides of the upper end of the base are connected with a lower die holder through pillars, an insert is embedded in the middle of the upper end of the lower die holder, the lower end of the insert is connected with a fixing plate, the fixing plate is fixedly connected with the lower die holder through screws, a top plate is sleeved on the upper portion of the insert, both sides of the lower end of the top plate are connected with first air cylinders, the first air cylinders are installed at the upper end of the lower die holder, ejector rods are connected inside the insert, the lower ends of the ejector rods extend to the lower end of the fixing plate and are connected with a bottom, and the two sides of the lower end of the upper plate are respectively embedded with a guide sleeve, the guide sleeves are internally connected with guide columns, the guide columns are connected onto the lower die base, the lower end of the bottom plate is connected with a second air cylinder, the second air cylinder is installed at the upper end of the base, an upper die base is connected above the top plate, and the middle part of the lower end of the upper die base is connected with a cavity block.

Preferably, the lower end of the fixing plate is provided with a sunk groove for conveniently accommodating the screw relative to the joint of the screw, and the middle part of the upper end of the fixing plate is provided with a first through hole for conveniently penetrating through the ejector rod.

Preferably, the upper part of the insert is inclined, a second through hole is formed in the upper end of the top plate corresponding to the upper part of the insert, and an inclined plane matched with the insert is formed in the lower part of the inner wall of the second through hole.

Preferably, the middle part of the upper end of the upper plate is provided with a third through hole which is convenient for the insert to accommodate.

Preferably, both sides of the upper end of the lower die base are provided with through holes corresponding to the penetrating positions of the connecting rods.

Preferably, the guide post is uniformly provided with lubricating grooves on the outer part.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses, through the setting of second cylinder, bottom plate, mold insert, roof and first cylinder, when the back-off is loosed core, the second cylinder shrink drives the bottom plate and moves downwards, makes the ejector pin down, and then mold insert upper portion shrink inwards and separate with the work piece, then under the drive of first cylinder, the roof rises upwards and drops the work piece, through the motion of above-mentioned structure, makes the thread back-off loose core convenient and fast, and the dropout is simple;

(2) the connecting rod and the upper plate are arranged on the bottom plate, and the guide post is arranged on the upper plate, so that the upper plate moves up and down along the guide post under the action of the connecting rod when the bottom plate moves up and down, the movement is stable, the problem that threads are damaged due to the fact that the movement deviation is effectively avoided, and the quality of a workpiece is improved when the threads are tripped.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

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

fig. 2 is an enlarged schematic view of a in fig. 1 according to the present invention;

fig. 3 is an enlarged schematic view of B of fig. 1 according to the present invention;

in the figure: 1. a base; 2. a pillar; 3. a lower die holder; 4. an insert; 5. a fixing plate; 6. a screw; 7. a top plate; 8. a first cylinder; 9. a top rod; 10. a base plate; 11. a connecting rod; 12. an upper plate; 13. a guide sleeve; 14. a guide post; 15. a second cylinder; 16. an upper die holder; 17. a cavity block; 18. a first through hole; 19. a second through hole; 20. a bevel; 21. a third through hole; 22. perforating; 23. a lubrication groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the first embodiment, as shown in fig. 1, 2 and 3, the present invention comprises a base 1, both sides of the upper end of the base 1 are connected with a lower die holder 3 through pillars 2, an insert 4 is embedded in the middle of the upper end of the lower die holder 3 for supporting a workpiece, the lower end of the insert 4 is connected with a fixing plate 5, the insert 4 is mounted on the lower die holder 3 through the fixing plate 5, the fixing plate 5 is fixedly connected with the lower die holder 3 through screws 6, the upper portion of the insert 4 is sleeved with a top plate 7 for ejecting the workpiece, both sides of the lower end of the top plate 7 are connected with first air cylinders 8 for driving the top plate 7 to move, the first air cylinders 8 are mounted on the upper end of the lower die holder 3, the insert 4 is internally connected with ejector rods 9 for spreading and expanding the insert 4, the lower ends of the ejector rods 9 extend to the lower ends of the fixing plate 5 and are connected with a

bottom plate

10, and 12 lower extreme both sides of upper plate all inlay and are equipped with uide bushing 13, uide bushing 13 internal connection has guide post 14, guide post 14 is connected on die holder 3, bottom plate 10 lower extreme is connected with second cylinder 15, second cylinder 15 is installed in base 1 upper end, drive bottom plate 10 through the second cylinder 15 is flexible and move, and then drive upper plate 12 up-and-down motion under the effect of connecting rod 11, roof 7 top is connected with

upper die base

16, 16 lower extreme middle parts of upper die base are connected with die cavity piece 17, the convenience is moulded plastics in die cavity piece 17.

In the second embodiment, on the basis of the first embodiment, a sunk groove for conveniently accommodating the screw 6 is formed in the joint of the lower end of the fixing plate 5 relative to the screw 6, and a first through hole 18 for conveniently penetrating the top rod 9 is formed in the middle of the upper end of the fixing plate 5.

In the third embodiment, on the basis of the first embodiment, the upper portion of the insert 4 is inclined, the upper end of the top plate 7 corresponding to the upper portion of the insert 4 is provided with a second through hole 19, the lower portion of the inner wall of the second through hole 19 is provided with an inclined surface 20 matched with the insert 4, through the arrangement of the second through hole 19 and the inclined surface 20, when the ejector rod 9 is ejected, the insert 4 expands, and the second through hole 19 and the inclined surface 20 play a role in limiting.

In the fourth embodiment, on the basis of the first embodiment, a third through hole 21 is formed in the middle of the upper end of the upper plate 12 for accommodating the insert 4.

In the fifth embodiment, on the basis of the first embodiment, through holes 22 are formed in the two sides of the upper end of the lower die base 3, which are opposite to the penetrating positions of the connecting rods 11, so that the connecting rods 11 can move in the through holes 22 conveniently.

Sixth embodiment, on the basis of first embodiment, the guide post 14 is externally provided with the lubrication groove 23 uniformly, so as to facilitate the lubrication of the guide post 14.

The working principle is as follows: when the injection molding machine is used, a workpiece is molded in the cavity block 17, the upper die holder 16 drives the cavity block 17 to be separated, the workpiece is located at the upper end of the insert 4, at the moment, the ejector rod 9 is in an extending state to stretch out and expand the insert 4, the second cylinder 15 contracts to drive the bottom plate 10 to move downwards, the ejector rod 9 moves downwards along with the bottom plate 10, at the moment, the upper portion of the insert 4 contracts inwards and is separated from the workpiece, then the first cylinder 8 extends out to drive the top plate 7 to eject out the workpiece, so that the back-off core-pulling is completed, when the next operation is performed, the second cylinder 15 extends out to enable the bottom plate 10 to drive the ejector rod 9 to move upwards to stretch out and expand the insert 4, meanwhile, under the action of the connecting rod 11, the upper plate 12 moves upwards along the outer portion of the insert 4 and abuts against the top plate 7 to.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a thread back-off core pulling mould, includes base (1), its characterized in that: the die comprises a base (1), a lower die holder (3) is connected to two sides of the upper end of the base (1) through pillars (2), an insert (4) is embedded in the middle of the upper end of the lower die holder (3), a fixing plate (5) is connected to the lower end of the insert (4), the fixing plate (5) is fixedly connected with the lower die holder (3) through screws (6), a top plate (7) is sleeved on the upper portion of the insert (4), first air cylinders (8) are connected to two sides of the lower end of the top plate (7), the first air cylinders (8) are installed at the upper end of the lower die holder (3), ejector rods (9) are connected to the inner portion of the insert (4), the lower ends of the ejector rods (9) extend to the lower end of the fixing plate (5) and are connected with a bottom plate (10), an upper plate (12) penetrates through the lower die holder (3) through connecting rods (11) to, the guide sleeve (13) is internally connected with a guide column (14), the guide column (14) is connected to the lower die holder (3), the lower end of the bottom plate (10) is connected with a second cylinder (15), the second cylinder (15) is installed at the upper end of the base (1), an upper die holder (16) is connected above the top plate (7), and the middle part of the lower end of the upper die holder (16) is connected with a cavity block (17).

2. The thread back-off core-pulling die according to claim 1, characterized in that: the lower end of the fixing plate (5) is provided with a sunk groove for conveniently accommodating the screw (6) relative to the joint of the screw (6), and the middle part of the upper end of the fixing plate (5) is provided with a first through hole (18) for conveniently penetrating through the ejector rod (9).

3. The thread back-off core-pulling die according to claim 1, characterized in that: the upper part of the insert (4) is inclined, a second through hole (19) is formed in the upper end of the top plate (7) corresponding to the upper part of the insert (4), and an inclined plane (20) matched with the insert (4) is formed in the lower part of the inner wall of the second through hole (19).

4. The thread back-off core-pulling die according to claim 1, characterized in that: and a third through hole (21) convenient for the insert (4) to accommodate is formed in the middle of the upper end of the upper plate (12).

5. The thread back-off core-pulling die according to claim 1, characterized in that: two sides of the upper end of the lower die holder (3) are provided with through holes (22) corresponding to the penetrating positions of the connecting rods (11).

6. The thread back-off core-pulling die according to claim 1, characterized in that: and lubricating grooves (23) are uniformly formed in the outer part of the guide column (14).