CN216100324U

CN216100324U - Compression flat die

Info

Publication number: CN216100324U
Application number: CN202122418783.3U
Authority: CN
Inventors: 赵景鑫
Original assignee: Changzhou Fusheng New Material Technology Co ltd
Current assignee: Changzhou Fusheng New Material Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-03-22
Anticipated expiration: 2031-10-08

Abstract

The utility model relates to a flat bush of compression relates to the technical field of calendering mould, include for the compression die body that links to each other with the bulldozer, be equipped with the compression chamber in the compression die body, the cross section in compression chamber is followed and is kept away from the bulldozer direction and is narrowed gradually, be equipped with the discharge gate on the compression die body, bulldozer one end intercommunication is kept away from to discharge gate and compression chamber, sliding connection has first clamp plate and second clamp plate in the compression chamber, be equipped with the hot plate on the compression die body, be equipped with on the compression die body and be used for driving first clamp plate and second clamp plate gliding actuating mechanism in opposite directions. The hot plate heats the compression die body, improves the mobility of polytetrafluoroethylene material, and actuating mechanism drive first clamp plate and second clamp plate slide in opposite directions, and then shortens the distance between first clamp plate and the second clamp plate for the blank thickness through between first clamp plate and the second clamp plate changes, is convenient for adapt to the processing of different thickness blanks, need not redesign mould, reduces manufacturing cost.

Description

Compression flat die

Technical Field

The application relates to the technical field of calendering dies, in particular to a compression flat die.

Background

Polytetrafluoroethylene, abbreviated as PTFE, commonly known as "plastic king", is a high molecular polymer polymerized from tetrafluoroethylene monomer, has the characteristics of acid resistance, alkali resistance, high temperature resistance and the like, and occupies a favorable position in industrial production and environmental protection industries, and polytetrafluoroethylene is generally used as a waterproof breathable film.

In the traditional process of manufacturing the polytetrafluoroethylene film, a round-mouth die is used for pre-extruding and forming a round bar stock, the round bar stock is extruded by a compression die to form a platy blank with a certain thickness, and the platy blank is rolled by a calender roll to form the film.

However, in the actual production process, the thickness of the extruded sheet blank of each set of compression dies is fixed, and when blanks with other thicknesses need to be obtained, the compression dies need to be redesigned, thereby increasing the production cost.

SUMMERY OF THE UTILITY MODEL

In order to improve because of blank thickness change, lead to redesign compression mould to cause the higher problem of manufacturing cost, this application provides a compression flat die.

The application provides a compression flat die adopts following technical scheme:

the utility model provides a flat die of compression, includes the compression die body that is used for linking to each other with the machine that pushes away, be equipped with the compression chamber in the compression die body, the cross section in compression chamber is along keeping away from the machine direction that pushes away and narrowing gradually, be equipped with the discharge gate on the compression die body, the bulldozer one end intercommunication is kept away from to discharge gate and compression chamber, sliding connection has first clamp plate and second clamp plate in the compression chamber, be equipped with the hot plate on the compression die body, be equipped with on the compression die body and be used for driving first clamp plate and second clamp plate gliding actuating mechanism in opposite directions.

Through adopting above-mentioned technical scheme, the hot plate heats the compression die body, improves the mobility of polytetrafluoroethylene material, and actuating mechanism drives first clamp plate and second clamp plate and slides in opposite directions, and then shortens the distance between first clamp plate and the second clamp plate for the blank thickness through between first clamp plate and the second clamp plate changes, and then is convenient for adapt to the processing work of different thickness blanks, need not redesign mould, reduces manufacturing cost.

Preferably, a feeding cavity is arranged in the compression mold, one end of the feeding cavity is communicated with the pushing machine, the other end of the feeding cavity is communicated with the compression cavity, the opening cross section of the feeding cavity gradually narrows along the direction away from the pushing machine, and the opening angle of the feeding cavity is 50-70 degrees.

Through adopting above-mentioned technical scheme, the feeding chamber mainly used extrudees in advance to round bar, and the opening angle in feeding chamber is 50 ~ 70, and the feeding chamber is the loudspeaker form, is convenient for adapt to the round bar processing of different diameters, improves the suitability of round bar.

Preferably, the heating temperature of the heating plate is 50-80 ℃.

By adopting the technical scheme, the heating temperature of the heating plate is 50-80 ℃, on one hand, the compression die body can be heated, and the compression die body heats the round bar stock in a heat conduction mode, so that the fluidity of the round bar stock is improved, and the round bar stock is convenient to extrude and deform; on the other hand, the heating temperature is lower than the melting point of the polytetrafluoroethylene, so that the possibility of melting the polytetrafluoroethylene is reduced.

Preferably, a transition cavity is communicated between the feeding cavity and the compression cavity, and the cross section of the transition cavity is square.

By adopting the technical scheme, the cross section of the transition cavity is square, so that on one hand, the extrusion degree of a round bar can be improved, and the combination of the molecules of the blank passing through the transition cavity is tighter; on the other hand, the transition cavity can realize the transition between the feeding cavity and the compression cavity, and the problem of poor air tightness of the compression cavity caused by the mismatching of interfaces between the feeding cavity and the compression cavity is reduced.

Preferably, actuating mechanism includes first regulation post and second regulation post, first regulation post and first clamp plate fixed connection, second regulation post and second clamp plate fixed connection, all be equipped with the guide way on first regulation post, the second regulation post, correspond on the compression die body be equipped with be used for with guide way sliding connection's guide block, be equipped with the first drive assembly who adjusts the post and slides in opposite directions with the second regulation post of drive on the compression die body.

By adopting the technical scheme, the driving assembly drives the first adjusting column and the second adjusting column to slide oppositely, so as to drive the first pressing plate and the second pressing plate to slide oppositely, the operation is convenient, and the sliding consistency of the first pressing plate and the second pressing plate is improved; the guide block is connected with the guide groove in a sliding mode, and the possibility of deflection of the first pressing plate and the second pressing plate is reduced.

Preferably, be equipped with first screw thread section on the first regulation post, drive assembly includes first swivel nut and second swivel nut, first swivel nut rotates with the compression die body to be connected, first swivel nut and first screw thread section threaded connection, be equipped with the second screw thread section on the second regulation post, the second swivel nut rotates with the compression die body to be connected, second swivel nut and second screw thread section threaded connection, be equipped with on the compression die body and be used for driving first swivel nut and second swivel nut pivoted driving piece.

By adopting the technical scheme, the driving piece drives the first screw sleeve and the second screw sleeve to rotate so as to drive the first screw sleeve to be connected with the first threaded section and the second screw sleeve to be connected with the second threaded section, so that the first adjusting column and the second adjusting column slide oppositely and the transmission is stable; on the other hand, the self-locking capacity of the first threaded sleeve and the second threaded sleeve can be improved, and the possibility of back sliding of the first adjusting column and the second adjusting column is reduced.

Preferably, the driving member includes a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected to the first threaded sleeve, the second bevel gear is fixedly connected to the second threaded sleeve, a third bevel gear for meshing with the first bevel gear and the second bevel gear simultaneously is rotatably connected to the compression mold body, and a limiting member for preventing the third bevel gear from rotating is arranged on the compression mold body.

By adopting the technical scheme, the third bevel gear rotates to drive the first bevel gear and the second main gear to rotate simultaneously, the rotating directions of the first bevel gear and the second bevel gear are opposite, so that the first adjusting column and the second adjusting column slide in opposite directions, and the cost is saved in the aspect of operation.

Preferably, the limiting part comprises a ratchet wheel which is coaxially and fixedly connected with the third bevel gear, the compression mold body is rotatably connected with a pawl, and a torsion spring which is used for driving the pawl to be clamped with the ratchet wheel is arranged on the compression mold body.

Through adopting above-mentioned technical scheme, the torsion drive pawl of torsional spring rotates towards the ratchet direction, and pawl and ratchet joint prevent the ratchet and rotate, and then prevent that third bevel gear from taking place to revolve, improve the accuracy nature of first clamp plate and second clamp plate smooth distance.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the heating plate heats the compression die body, the flowability of the polytetrafluoroethylene material is improved, the driving mechanism drives the first pressing plate and the second pressing plate to slide in opposite directions, and further the distance between the first pressing plate and the second pressing plate is shortened, so that the thickness of the blank passing through the space between the first pressing plate and the second pressing plate is changed, the processing work of blanks with different thicknesses is facilitated, the die does not need to be redesigned, and the production cost is reduced;

2. the heating temperature of the heating plate is 50-80 ℃, on one hand, the compression die body can be heated, and the compression die body heats the round bar material in a heat conduction mode, so that the fluidity of the round bar material is improved, and the round bar material is conveniently extruded and deformed; on the other hand, the heating temperature is 3. the heating temperature is lower than the melting point of the polytetrafluoroethylene, so that the possibility of melting the polytetrafluoroethylene is reduced;

the torsion of the torsion spring drives the pawl to rotate towards the ratchet wheel, the pawl is connected with the ratchet wheel in a clamping mode, the ratchet wheel is prevented from rotating, the third bevel gear is prevented from rotating, and the accuracy of the sliding distance between the first pressing plate and the second pressing plate is improved.

Drawings

Fig. 1 is a schematic structural diagram of an entire flat die for embodying the flat die in the embodiment of the present application.

Fig. 2 is a sectional view for embodying a compression chamber in the embodiment of the present application.

Fig. 3 is a sectional view for embodying a drive mechanism in the embodiment of the present application.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Description of reference numerals: 1. pushing a press machine; 11. a feeding cylinder; 12. round bar stock; 2. compressing the die body; 21. a compression chamber; 22. a discharge port; 23. a first platen; 24. a second platen; 25. heating plates; 26. a feed cavity; 27. a transition chamber; 3. a drive mechanism; 31. a first conditioning column; 311. a guide groove; 312. a guide block; 313. a first thread segment; 32. a second conditioning column; 321. a second thread segment; 33. a drive assembly; 331. a first threaded sleeve; 332. a second thread insert; 333. a drive member; 3331. a first bevel gear; 3332. a second bevel gear; 3333. a third bevel gear; 3334. a support; 3335. a rotating shaft; 3336. a hand wheel; 334. a limiting member; 3341. a ratchet wheel; 3342. a pawl; 3343. a pin shaft; 3344. a torsion spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a compression flat die. Referring to fig. 1 and 2, a flat compression die comprises a compression die body 2 connected with a pushing press 1, a compression cavity 21 is formed in the compression die body 2, the cross section of the compression cavity 21 gradually narrows along the direction away from the pushing press 1, a discharge port 22 is formed in one end of the compression die body 2 away from the pushing press 1, and the discharge port 22 is communicated with the compression cavity 21. The heating plate 25 is installed on the compression die body 2, and the heating plate 25 is used for heating the compression die body 2, so that the extrusion flowability of the blank is improved conveniently. A first pressing plate 23 and a second pressing plate 24 are connected in the compression cavity 21 in a sliding manner, a driving mechanism 3 is installed on the compression die body 2, and the driving mechanism 3 is used for driving the first pressing plate 23 and the second pressing plate 24 to slide oppositely so as to shorten the distance between the first pressing plate 23 and the second pressing plate 24.

During operation, hot plate 25 heats, push away press 1 and push away to compression chamber 21 with round bar 12, compression chamber 21 carries out extrusion deformation to round bar 12 under the heating state, actuating mechanism 3 drives first clamp plate 23 and second clamp plate 24 and slides in opposite directions, and then shortens the distance between first clamp plate 23 and the second clamp plate 24, reduces the ejection of compact thickness of stock promptly, is convenient for adapt to the processing work of different thickness blanks, need not redesign new mould, saves the cost.

Referring to fig. 2, the output end of the pushing machine 1 is fixedly connected with a feeding cylinder 11 through a bolt, and one end of the feeding cylinder 11, which is far away from the pushing machine 1, is fixedly connected with the compression die body 2 through a bolt. A round bar 12 can slide in the feed cylinder 11, one end of the round bar 12 is connected with the pushing machine 1, and the other end extends into the compression die body 2. A feeding cavity 26 is formed in the compression die body 2, one end of the feeding cavity 26 is communicated with the feeding cylinder 11, and the other end of the feeding cavity 26 is communicated with the compression cavity 21. The opening section of the feeding cavity 26 gradually narrows along the direction away from the pushing machine 1 to form a trumpet shape, and one end of the round bar stock 12 away from the pushing machine 1 is abutted with the inner side wall of the feeding cavity 26. The opening angle of the feeding cavity 26 is 50-70 degrees, 65 degrees are adopted in the embodiment of the application, the feeding cavity is convenient to adapt to round bar stocks 12 with different diameters, and the adaptability is strong.

Referring to fig. 2, a transition cavity 27 is communicated between the feeding cavity 26 and the compression cavity 21, and the cross section of the transition cavity 27 is square. The length of the cross section of the compression die body 2 is gradually increased along the direction far away from the pushing machine 1, and the cross section of the compression cavity 21 is gradually reduced along the direction far away from the pushing machine 1. The number of the heating plates 25 is two, and the heating plates 25 are respectively in one-to-one corresponding glue joint with the upper surface and the lower surface of the compression die body 2. The compression cavity 21 is located inside the compression die body 2, one end of the compression cavity 21 is communicated with the transition cavity 27, and the other end is communicated with the discharge hole 22, in the embodiment of the present application, the compression cavity 21 is flat.

During operation, the round bar stock 12 is firstly pre-extruded and cured through the horn-shaped feeding cavity 26, then is subjected to transitional extrusion and curing through the square transitional cavity 27, and finally is discharged from the discharge port 22 after being subjected to final extrusion and curing through the flat compression cavity 21 to form a blank with uniform thickness, and the round bar stock 12 can improve the binding force of blank molecules after being extruded for multiple times.

Referring to fig. 2 and 3, the first pressing plate 23 is attached to the upper top wall of the compression chamber 21, the second pressing plate 24 is attached to the lower bottom wall of the compression chamber 21, the first pressing plate 23 and the second pressing plate 24 are oppositely arranged, the first pressing plate 23 and the second pressing plate 24 are both obliquely arranged towards the direction of the transition chamber 27, and the first pressing plate 23 and the second pressing plate 24 form an unclosed ">" sign. The driving mechanism 3 comprises a first adjusting column 31 and a second adjusting column 32, one end of the first adjusting column 31 is welded and fixed with the first pressing plate 23, the other end of the first adjusting column 31 penetrates out of the upper top wall of the compression cavity 21, one end of the second adjusting column 32 is welded and fixed with the second pressing plate 24, and the other end of the second adjusting column 32 penetrates out of the lower bottom wall of the compression cavity 21. In order to reduce the possibility of rotation of the first adjusting column 31 and the second adjusting column 32, guide grooves 311 are formed in both sides of the first adjusting column 31 along the length direction thereof, and a guide block 312 for slidably connecting with the guide grooves 311 is welded to the compression mold body 2. The second adjusting column 32 has the same structure as the first adjusting column 31, and is not described herein. The guide block 312 serves as a guide to reduce the possibility of rotation of the first presser plate 23 or the second presser plate 24.

Referring to fig. 3, a driving assembly 33 is installed on the compression mold body 2, and the driving assembly 33 is used for driving the first adjusting column 31 and the second adjusting column 32 to slide towards each other. The driving assembly 33 includes a driving member 333, a first nut 331, and a second nut 332, and the driving member 333 includes a third bevel gear 3333 and two supports 3334, and the two supports 3334 are symmetrically disposed with respect to a parting plane of the compression mold body 2. One end of the support 3334 is welded and fixed with the compression die body 2, and the other end of the support 3334 is spliced with one end of the other support 3334 far away from the compression die body 2. The support 3334 is rotatably connected with a rotating shaft 3335, and the third bevel gear 3333 is coaxially welded and fixed with the rotating shaft 3335. The hand wheel 3336 is coaxially welded at one end of the rotating shaft 3335 far away from the compression die body 2, so that an operator can conveniently grasp the hand wheel. A first bevel gear 3331 is rotatably connected to the support 3334 above the compression die body 2, the first bevel gear 3331 is coaxially and fixedly connected with the first threaded sleeve 331, and the first bevel gear 3331 is meshed with the third bevel gear 3333. A second bevel gear 3332 is rotatably connected to the support 3334 below the compression die body 2, the second bevel gear 3332 is coaxially welded and fixed with the second threaded sleeve 332, and the second bevel gear 3332 is also meshed with the third bevel gear 3333. The first adjusting column 31 has a first threaded section 313 for being threadedly connected to the first threaded sleeve 331, and the second adjusting column 32 has a second threaded section 321 for being threadedly connected to the second threaded sleeve 332.

During operation, an operator rotates the hand wheel 3336 by hand, the hand wheel 3336 drives the rotation shaft 3335 to rotate, the rotation shaft 3335 rotates to drive the third bevel gear 3333 to rotate, the third bevel gear 3333 is respectively engaged with the first bevel gear 3331 and the second bevel gear 3332, and then drives the first threaded sleeve 331 and the second threaded sleeve 332 to rotate, and at the moment, the rotation directions of the first threaded sleeve 331 and the second threaded sleeve 332 are opposite. The first threaded sleeve 331 is in threaded connection with the first threaded section 313, so that the first adjusting column 31 is driven to slide towards the second adjusting column 32, and the first adjusting column 31 drives the first pressing plate 23 to slide towards the second pressing plate 24; the second thread sleeve 332 is in threaded connection with the second thread section 321, so as to drive the second adjusting column 32 to slide towards the first adjusting column 31, and the second adjusting column 32 drives the second pressing plate 24 to slide towards the first pressing plate 23, so as to shorten the distance between the first pressing plate 23 and the second pressing plate 24, thereby reducing the thickness of the blank of the discharge hole 22.

Referring to fig. 4, in order to reduce the possibility of rotation of the rotating shaft 3335, the limiting member 334 is mounted on the rotating shaft 3335, the limiting member 334 includes a ratchet 3341 and a pawl 3342, the ratchet 3341 is coaxially welded on the rotating shaft 3335, a pin 3343 is rotatably connected to the bracket 3334, one end of the pin 3343 extending out of the bracket 3334 is welded and fixed to the pawl 3342, and the pawl 3342 is engaged with the ratchet 3341. The pin shaft 3343 is coaxially sleeved with a torsion spring 3344, one end of the torsion spring 3344 is welded and fixed with the support 3334, and the other end of the torsion spring 3344 is welded and fixed with the pawl 3342. The elastic force of the torsion spring 3344 drives the pawl 3342 to engage with the ratchet 3341, so that the rotating shaft 3335 can only rotate in one direction in a natural state, thereby improving the stability of fixing the relative positions of the first pressing plate 23 and the second pressing plate 24.

The implementation principle of the compression flat die in the embodiment of the application is as follows: when the thickness of the required blank is changed, an operator firstly rotates the hand wheel 3336 by hand, the hand wheel 3336 rotates to drive the rotating shaft 3335 to rotate, the rotating shaft 3335 drives the third bevel gear 3333 to rotate, the third bevel gear 3333 is respectively meshed with the first bevel gear 3331 and the second bevel gear 3332, and then the first threaded sleeve 331 and the second threaded sleeve 332 are driven to rotate, so that the first pressing plate 23 and the second pressing plate 24 are driven to slide oppositely, the distance between the first pressing plate 23 and the second pressing plate 24 is shortened, the thickness of the blank at the discharge hole 22 is adjusted, a mold does not need to be set again, and the production cost is saved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a flat die of compression, includes for the compression die body (2) that link to each other with pushing away press (1), be equipped with compression chamber (21) in compression die body (2), the cross section of compression chamber (21) is along keeping away from pushing away press (1) direction and narrowing gradually, be equipped with discharge gate (22) on compression die body (2), discharge gate (22) and compression chamber (21) keep away from pushing away press (1) one end intercommunication, its characterized in that: the compression mold is characterized in that a first pressing plate (23) and a second pressing plate (24) are connected in the compression cavity (21) in a sliding mode, a heating plate (25) is arranged on the compression mold body (2), and a driving mechanism (3) used for driving the first pressing plate (23) and the second pressing plate (24) to slide in opposite directions is arranged on the compression mold body (2).

2. A compression flat die as claimed in claim 1, characterised in that: a feeding cavity (26) is arranged in the compression die body (2), one end of the feeding cavity (26) is communicated with the pushing machine (1), the other end of the feeding cavity (26) is communicated with the compression cavity (21), the opening cross section of the feeding cavity (26) gradually narrows along the direction far away from the pushing machine (1), and the opening angle of the feeding cavity (26) is 50-70 degrees.

3. A compression flat die as claimed in claim 1, characterised in that: the heating temperature of the heating plate (25) is 50-80 ℃.

4. A compression flat die as claimed in claim 2, characterised in that: a transition cavity (27) is communicated between the feeding cavity (26) and the compression cavity (21), and the cross section of the transition cavity (27) is square.

5. A compression flat die as claimed in claim 1, characterised in that: actuating mechanism (3) are including first regulation post (31) and second regulation post (32), first regulation post (31) and first clamp plate (23) fixed connection, second regulation post (32) and second clamp plate (24) fixed connection, all be equipped with guide way (311) on first regulation post (31), second regulation post (32), it is used for guide block (312) with guide way (311) sliding connection to correspond to be equipped with on compression die body (2), be equipped with on compression die body (2) and drive first regulation post (31) and second regulation post (32) gliding drive assembly (33) in opposite directions.

6. A compression flat die as claimed in claim 5, characterised in that: be equipped with first thread section (313) on first regulation post (31), drive assembly (33) include first swivel nut (331) and second swivel nut (332), first swivel nut (331) rotates with compression die body (2) to be connected, first swivel nut (331) and first thread section (313) threaded connection, be equipped with second thread section (321) on second regulation post (32), second swivel nut (332) rotates with compression die body (2) to be connected, second swivel nut (332) and second thread section (321) threaded connection, be equipped with on compression die body (2) and be used for driving first swivel nut (331) and second swivel nut (332) pivoted driving piece (333).

7. The compression flat die of claim 6, wherein: the driving piece (333) comprises a first bevel gear (3331) and a second bevel gear (3332), the first bevel gear (3331) is fixedly connected with a first threaded sleeve (331), the second bevel gear (3332) is fixedly connected with a second threaded sleeve (332), a third bevel gear (3333) which is meshed with the first bevel gear (3331) and the second bevel gear (3332) simultaneously is rotatably connected to the compression die body (2), and a limiting piece (334) which is used for preventing the third bevel gear (3333) from rotating is arranged on the compression die body (2).

8. The compression flat die of claim 7, wherein: the limiting piece (334) comprises a ratchet wheel (3341) coaxially and fixedly connected with the third bevel gear (3333), a pawl (3342) is rotatably connected to the compression die body (2), and a torsion spring (3344) used for driving the pawl (3342) to be connected with the ratchet wheel (3341) in a clamping mode is arranged on the compression die body (2).