CN114620537B

CN114620537B - Adhesive tape with electromagnetic shielding function and preparation device thereof

Info

Publication number: CN114620537B
Application number: CN202210492156.0A
Authority: CN
Inventors: 汤友文; 汤友成; 陈陈伟
Original assignee: Zhejiang Maisiweier Insulation Technology Co ltd
Current assignee: Zhejiang Maisiweier Insulation Technology Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2023-02-17
Anticipated expiration: 2042-05-07
Also published as: CN114620537A

Abstract

The invention discloses an adhesive tape with an electromagnetic shielding function, which comprises release paper and conductive cloth, wherein the release paper and the conductive cloth are mutually attached to form a composite tape, and the surfaces of the release paper and the conductive cloth which are mutually attached are coated with back adhesive. The utility model provides a preparation facilities of sticky tape with electromagnetic shield function, includes high-order frame and low level frame, the high-order frame is put on the shelf and is equipped with the first driving roller of constituteing by two roll bodys, the low level frame is put on the shelf and is equipped with the second driving roller of constituteing by two roll bodys. The invention adopts the mode of coating the back adhesive on the conductive cloth and then pasting the release paper to form the composite tape product, thereby avoiding the situation of back adhesive adhesion and ensuring the quality of the finished product. In order to ensure the uniformity of gum coating, an extrusion mechanism is arranged, the extrusion of the gum is realized by relative movement with the composite belt while the composite belt is extruded, the gap between the conductive cloth and the release paper, which is not filled with the gum, is avoided, and dust is prevented from entering.

Description

Adhesive tape with electromagnetic shielding function and preparation device thereof

Technical Field

The invention relates to the technical field of adhesive tape preparation, in particular to an adhesive tape with an electromagnetic shielding function and a preparation device thereof.

Background

The shielding adhesive tape is a metal foil or conductive cloth with a high-conductivity back adhesive, and the conductive back adhesive and a conductive base material of the shielding adhesive tape form a complete conductor which can be bonded with any metal surface in a bonding mode to complete electric lap joint and electric sealing of gaps.

The existing shielding adhesive tape is mostly the combination of conductive cloth and gum, one side of the conductive cloth is coated with the gum and then is packaged in a roll, but is affected by the surface property of the conductive cloth, and the adhesion of the adjacent conductive cloth can be generated when the conductive cloth is rolled by some gum, so that the use performance is affected.

In the production of the shielding adhesive tape, due to the influence of equipment and technical precision of glue coating, the problem that the fixing effect of the conductive cloth is not good in use due to uneven back glue coating or the problem that the surface of the adhesive tape is fluctuated and uneven when the adhesive tape is pasted due to uneven back glue coating often occurs, and the attractiveness, the strength, the shielding effect and the like of the adhesive tape are influenced to a certain degree.

Disclosure of Invention

In order to solve at least one technical problem mentioned in the background art, an object of the present invention is to provide an adhesive tape having an electromagnetic shielding function and a manufacturing apparatus thereof, for leveling a back adhesive in the adhesive tape to be uniform.

In order to achieve the purpose, the invention provides the following technical scheme:

the adhesive tape with the electromagnetic shielding function comprises release paper and conductive cloth, wherein the release paper and the conductive cloth are mutually attached to form a composite tape, and the surfaces, which are mutually attached, of the release paper and the conductive cloth are coated with back adhesive.

A preparation device of an adhesive tape with an electromagnetic shielding function comprises an upper frame and a lower frame, wherein a first driving roller consisting of two roller bodies is erected on the upper frame, a second driving roller consisting of two roller bodies is erected on the lower frame, the first driving roller and the second driving roller are respectively used for accommodating two ends of a composite tape and straightening the composite tape along the length direction, and a driving mechanism for driving the first driving roller/the second driving roller to rotate is further arranged on the device; and an extrusion mechanism for extruding the composite belt along the direction vertical to the belt surface is arranged between the high-position frame and the low-position frame.

Compared with the prior art, the invention has the beneficial effects that: the composite tape product is formed by coating the back adhesive on the conductive cloth and then pasting the release paper, so that the situation of back adhesive adhesion is avoided, and the quality of a finished product is ensured.

In order to ensure the uniformity of back adhesive coating, an extrusion mechanism is arranged, so that the back adhesive is extruded and flattened by relative movement with the composite tape while the composite tape is extruded, gaps which are not filled with the back adhesive are prevented from being formed between the conductive cloth and the release paper, dust is prevented from entering, and the problem of poor subsequent adhering firmness and effect caused by uneven back adhesive is also prevented; the back glue is pushed to be flat, so that the thickness of the back glue can be consistent, the surface of the composite tape is smooth, and the attractiveness and the shielding effect are improved.

Furthermore, the extrusion mechanism comprises an upper pressing plate and a lower supporting piece which are respectively positioned at the upper side and the lower side of the composite belt, the lower supporting piece and the upper pressing plate are respectively provided with opposite extrusion parts, the extrusion parts on the lower supporting piece are abutted against the lower side of the composite belt, the lower supporting piece is provided with a telescopic piece for driving the upper pressing plate to be close to or far away from the composite belt, and the upper pressing plate and the lower supporting piece can move relatively, so that the composite belt can be conveniently and freely controlled to be extruded and loosened.

Further, the extrusion portion is including the orientation the cambered surface of overhead structure one side evagination, hold in the palm down on the piece orientation one side of overhead structure extends and forms the flange, the flange is located hold in the palm down on the piece the downside of extrusion portion, the cambered surface do benefit to push the gum to both sides by the centre, extrude evenly that the effect is better, also can extrude unnecessary gum.

Furthermore, a waste material groove is formed in the lower supporting piece, and is provided with an upward opening, the opening is located at the end of the extrusion part on the lower supporting piece, and extruded gum can be conveniently collected.

Furthermore, the waste material groove is provided with an inclined plane for the gum to flow downwards, a rotating frictioning wheel is arranged in the waste material groove, a connecting shaft is axially arranged on the frictioning wheel, one end of the connecting shaft is rotatably connected with the inner wall of the waste material groove, the other end of the connecting shaft is provided with a driving wheel, and the driving wheel is abutted against the lower surface of the composite belt to prevent the gum from being blocked.

Furthermore, a cutter is arranged on one side, facing the overhead frame, of the upper pressing plate, a shifting structure used for driving the cutter to move close to or away from the composite belt is arranged on the upper pressing plate, the cutter comprises a trimming blade extending along the length direction of the composite belt and a cutting blade used for cutting off the composite belt along the telescopic direction of the telescopic piece, the sticky gum and the uneven edge can be conveniently cut off and trimmed, and the width of the composite belt can be controlled through cutting.

Furthermore, the shift structure comprises a sliding groove arranged on the upper pressing plate, a sliding block is arranged in the sliding groove in a sliding mode, the cutter is connected to the sliding block, a rotatable stud is arranged in the sliding groove, the sliding block is in threaded connection with the stud, the depth of the cutter can be conveniently adjusted, and the cutting width of the cutter can be adjusted.

Furthermore, the cutter extends into the sliding groove to form a protruding part, the protruding part is connected with the sliding block in a sliding mode, and the sliding block is connected with a spring used for providing tension for the cutter, so that the cutter can be kept attached to the upper pressing plate in the front and back movement, and the stability of the cutter is guaranteed.

Drawings

FIG. 1 is a schematic view of the structure of the composite strip of the present invention;

FIG. 2 is a schematic view showing the overall structure of a production apparatus according to the present invention;

FIG. 3 is an enlarged view of A in FIG. 1;

FIG. 4 is a schematic structural view of the pressing mechanism of FIG. 1;

FIG. 5 is a schematic vertical cross-section of the chute portion of FIG. 1;

fig. 6 is a partial cross-sectional view in the direction B-B in fig. 4.

In the figure: 1. a composite tape; 11. release paper; 12. conductive cloth; 21. an elevated frame; 22. a low-position frame; 23. a first drive roller; 24. a second driving roller; 31. a lower support piece; 32. an upper pressure plate; 33. a pressing section; 34. a telescoping member; 4. a waste chute; 41. blocking edges; 42. a rubber scraping wheel; 421. a connecting shaft; 422. a drive wheel; 5. a cutter; 51. a chute; 52. a stud; 53. a slider; 54. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the embodiment provides an adhesive tape with an electromagnetic shielding function, where a portion of the adhesive tape for performing the electromagnetic shielding function includes a composite tape 1, the composite tape 1 is a double-layer structure and includes release paper 11 and conductive cloth 12, where the conductive cloth 12 provides the electromagnetic shielding function, the release paper 11 provides a protection function for a back adhesive, the conductive cloth 12 is attached to the release paper 11, and a back adhesive is coated on a surface where the release paper 11 and the conductive cloth 12 are attached to each other.

In the traditional production flow of coating the back adhesive on the conductive cloth 12 and then pasting the release paper 11 on the back adhesive, the limitation of equipment and process is caused, so that the uniformity of the back adhesive coating is limited, the situation that the conductive cloth 12 is not fully coated with the back adhesive and a gap is left between the conductive cloth 12 and the release paper 11 is caused, dust easily enters, or the sticking fastness is weak, and edge warping is caused; or the back adhesive is unevenly coated, so that the back adhesive thickness at each position on the conductive cloth 12 on the produced shielding adhesive tape is uneven, the surface of the adhesive tape is uneven, and the attractiveness and the shielding effect are influenced to a certain extent.

Therefore, in order to solve the problem, the embodiment provides a device for preparing an adhesive tape with an electromagnetic shielding function, as shown in fig. 2, including an upper frame 21 and a lower frame 22, a first driving roller 23 and a second driving roller 24 are erected on the upper frame 21 and the lower frame 22 respectively, the first driving roller 23 and the second driving roller 24 are both formed by combining two rollers, wherein the first driving roller 23 is higher than the second driving roller 24, one end of the composite tape 1 is accommodated between the two rollers of the first driving roller 23, and the other end is accommodated between the two rollers of the second driving roller 24, so that the composite tape 1 is in an inclined and straightened state.

The device is also provided with a motor for driving the first driving roller 23 and the second driving roller 24 to rotate, the motor is connected with the first driving roller 23 and the second driving roller 24 through gear transmission or belt transmission and the like, and the first driving roller 23 and the second driving roller 24 synchronously rotate to drive the composite belt 1 to move along the length direction and move from the high frame 21 to the low frame 22.

Referring to fig. 3 and 4, an extruding mechanism is disposed between the high rack 21 and the low rack 22, the extruding mechanism includes an upper pressing plate 32 and a lower supporting member 31 respectively located on the upper side and the lower side of the composite belt 1, the lower supporting member 31 and the upper pressing plate 32 are both provided with opposite extruding portions 33, wherein the extruding portion 33 on the lower supporting member 31 abuts against the lower surface of the composite belt 1, the lower supporting member 31 is provided with a telescopic member 34, in this embodiment, the telescopic member 34 includes, but is not limited to, an electric push rod, a cylinder, an oil cylinder, and the like, the telescopic end of the telescopic member 34 is connected with the upper pressing plate 32, the telescopic member 34 is telescopic to drive the upper pressing plate 32 to approach/depart from the composite belt 1, and in the approaching process, the extruding portion 33 on the upper pressing plate 32 gradually approaches to abut against the upper surface of the composite belt 1, and further clamps and extrudes the composite belt 1 together with the extruding portion 33 on the lower supporting member 31.

When the motor drives the first driving roller 23 and the second driving roller 24 to rotate so as to drive the composite tape 1 to move, and further in a state that the two squeezing portions 33 clamp and squeeze the composite tape 1, the movement of the lower support 31 and the upper press plate 32 relative to the composite tape 1 enables the two squeezing portions 33 to apply a squeezing force to the back adhesive of the middle layer, so that the back adhesive is enabled to diffuse and flow to be uniformly filled between the conductive cloth 12 and the release paper 11, and a uniform thickness is controlled.

The two squeezing portions 33 are located on the upper platen 32 and the lower support 31 near one side of the elevated frame 21 and include curved surfaces protruding outward toward one side of the elevated frame 21, and when the composite tape 1 moves from the elevated frame 21 to the lower frame 22, the two squeezing portions 33 clamp and squeeze the composite tape 1, so that the upper platen 32 and the lower support 31 exert an obliquely upward pushing action on the composite tape 1, and through the arrangement of the curved surfaces of the squeezing portions 33, when the applied gum has high fluidity and a large amount of application, the pushing process can extrude the excess gum from two sides of the composite tape 1 along the curved surfaces of the squeezing portions 33.

In order to prevent the excessive gum from dripping freely, in this embodiment, a rib 41 is formed on the lower support 31 extending toward one side of the elevated frame 21, and the rib 41 is located at the lower side of the extrusion portion 33 on the lower support 31, so that the extruded gum is blocked by the rib 41 to avoid dripping downwards.

And further enhancing the collection effect of the back glue, as shown in fig. 5, a waste chute 4 is provided in the lower support 31, the waste chute 4 has an upward opening, the end of the squeezing portion 33 of the lower support 31 is connected to the opening, and the excess glue flows into the waste chute 4 under the guidance of the squeezing portion 33 and the rib 41 for collection.

The gum has certain viscosity, so as to avoid blocking caused by excessive gum adhering to the side wall of the waste tank 4, an inclined surface for the glue to flow downwards is arranged in the waste tank 4, a rotating gum scraping wheel 42 for scraping the glue downwards is also arranged, a connecting shaft 421 is arranged on the gum scraping wheel 42 along the axial direction, one end of the connecting shaft 421 is rotatably connected with the inner wall of the waste tank 4, a driving wheel 422 is arranged at the other end of the connecting shaft 422, the driving wheel 422 is abutted against the lower surface of the composite belt 1, when the composite belt 1 moves relative to the lower support member 31, the composite belt 1 generates certain friction force on the driving wheel 422 to drive the driving wheel 422 to rotate, and then the gum scraping wheel 42 is driven to rotate through the connecting shaft 421 to scrape the gum and promote the flow.

When the used back adhesive has high viscosity and low flowability, or when the conductive cloth 12 and the release paper 11 are misaligned or deviated, or when the width of the composite tape 1 needs to be adjusted, the edge of the composite tape 1 needs to be processed, as shown in fig. 4 and 6, in this embodiment, a cutter 5 is disposed on one side of the upper platen 32 facing the elevated frame 21, a portion of the cutter 5 is attached to a side wall of the upper platen 32, and a portion of the cutter extends toward the elevated frame 21 along the length direction of the composite tape 1, wherein an edge cutting edge is disposed on the edge of the cutter 5 facing the elevated frame 21, a downward cutting edge is disposed on the lower edge of the cutter 5, the position of the cutter 5 is adjustable, and the adjustment direction is close to or away from the composite tape 1, where the side wall of the upper platen 32 is attached.

According to the cutting width of the composite tape 1, the position of the cutter 5 is adjusted, when the upper press plate 32 is close to the composite tape 1 and clamped tightly, the cutting edge of the cutter 5 is firstly pressed downwards against the flange 41, so that a notch is cut out from the composite tape 1, and then in the process that the composite tape 1 moves relative to the upper press plate 32 and the lower support piece 31, the cutting edge is cut along the length direction of the composite tape 1, so that the effects of cutting off the redundant gum and the redundant composite tape 1 and adjusting the width of the composite tape 1 are achieved.

In order to adjust the position of the cutting knife 5, in this embodiment, a sliding groove 51 is formed in the upper pressure plate 32, a sliding block 53 is slidably disposed in the sliding groove 51, a protruding portion is disposed in the cutting knife 5 and extends into the sliding groove 51, the protruding portion is slidably connected to the sliding block 53, a spring 54 is disposed between the sliding block 53 and the protruding portion, one end of the spring 54 is connected to the sliding block 53 and provides a pulling force to the cutting knife 5 to enable the cutting knife 5 to be attached to the upper pressure plate 32, a rotatable stud 52 is disposed in the sliding groove 51, the sliding block 53 is in threaded connection with the stud 52, a part of the stud 52 extends out of the sliding groove 51, and a handle is disposed to facilitate a human hand to grasp and twist, and the stud 52 is rotated to drive the sliding block 53 to move back and forth, so as to drive the cutting knife 5 to approach to/leave away from the composite tape 1.

It should be added that the waste material of the strip cut from the composite tape 1 by the cutter 5 can enter the waste material groove 4 under the guidance of the part of the cutter 5 attached to the upper press plate 32, and is wound on the doctor wheel 42 for collection.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The preparation device of the adhesive tape with the electromagnetic shielding function is characterized in that the adhesive tape comprises release paper (11) and conductive cloth (12), the release paper (11) and the conductive cloth (12) are mutually attached to form a composite tape (1), and back glue is coated on the surfaces of the release paper (11) and the conductive cloth (12) which are mutually attached; the preparation device comprises an upper frame (21) and a lower frame (22), wherein a first driving roller (23) consisting of two roller bodies is erected on the upper frame (21), a second driving roller (24) consisting of two roller bodies is erected on the lower frame (22), the first driving roller (23) and the second driving roller (24) are respectively used for accommodating two ends of the composite belt (1) and straightening the composite belt (1) along the length direction, and a driving mechanism for driving the first driving roller (23)/the second driving roller (24) to rotate is further arranged on the device; an extrusion mechanism for extruding the composite belt (1) along the direction vertical to the belt surface is arranged between the high frame (21) and the low frame (22); the extrusion mechanism comprises an upper pressing plate (32) and a lower supporting piece (31) which are respectively positioned on the upper side and the lower side of the composite belt (1), the lower supporting piece (31) and the upper pressing plate (32) are respectively provided with opposite extrusion parts (33), the extrusion parts (33) on the lower supporting piece (31) are abutted against the lower side of the composite belt (1), and the lower supporting piece (31) is provided with a telescopic piece (34) for driving the upper pressing plate (32) to be close to or far away from the composite belt (1); a cutter (5) is arranged on one side, facing the overhead frame (21), of the upper pressing plate (32), a shifting structure for driving the cutter (5) to move close to or away from the composite tape (1) is arranged on the upper pressing plate (32), and the cutter (5) comprises a trimming blade extending along the length direction of the composite tape (1) and a cutting blade for cutting off the composite tape (1) along the telescopic direction of the telescopic piece (34); the shifting structure comprises a sliding groove (51) arranged on the upper pressing plate (32), a sliding block (53) is arranged in the sliding groove (51) in a sliding mode, the cutter (5) is connected to the sliding block (53), a rotatable stud (52) is arranged in the sliding groove (51), and the sliding block (53) is in threaded connection with the stud (52); the cutting knife (5) extends into the sliding groove (51) to form a protruding portion, the protruding portion is connected with the sliding block (53) in a sliding mode, and a spring (54) used for providing tensile force for the cutting knife (5) is connected to the sliding block (53).

2. The apparatus for preparing an adhesive tape with electromagnetic shielding function according to claim 1, wherein the pressing portion (33) comprises a convex surface protruding outward toward the side of the elevated frame (21), the lower holder (31) extends toward the side of the elevated frame (21) to form a rib (41), and the rib (41) is located on the lower side of the pressing portion (33) on the lower holder (31).

3. The apparatus for preparing an adhesive tape with electromagnetic shielding function according to claim 2, wherein a waste tank (4) is provided in the lower holder (31), and the waste tank (4) has an upward opening at an end position of the pressing portion (33) on the lower holder (31).

4. The apparatus for preparing adhesive tape with electromagnetic shielding function according to claim 3, wherein the waste material tank (4) has an inclined surface for the back adhesive to flow downward, a rotating frictioning wheel (42) is disposed in the waste material tank (4), a connecting shaft (421) is disposed on the frictioning wheel (42) along the axial direction, one end of the connecting shaft (421) is rotatably connected with the inner wall of the waste material tank (4), a driving wheel (422) is disposed at the other end, and the driving wheel (422) abuts against the lower surface of the composite tape (1).