CN110881226A

CN110881226A - Flexible heater with heating wire mesh and production method thereof

Info

Publication number: CN110881226A
Application number: CN201911126540.3A
Authority: CN
Inventors: 朱茂凯卦; 肖永波
Original assignee: FOSHAN JPCI CONTROL MANUFACTURING Co Ltd
Current assignee: FOSHAN JPCI CONTROL MANUFACTURING Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-03-13

Abstract

The invention relates to a flexible heater with a heating wire mesh and a production method thereof, which comprises the following steps: 1) a first adhesive layer is pasted below the first insulating flexible foil, and a second adhesive layer is pasted above the second insulating flexible foil; 2) placing the sine-shaped or sawtooth-shaped heating wire mesh on the second bonding layer; 3) pressing the sine-shaped or saw-tooth-shaped heating wire net and the second bonding layer, wherein the sine-shaped or saw-tooth-shaped heating wire net is infiltrated into the second bonding layer by the pressure and is firmly bonded; 4) place first adhesive linkage in second adhesive linkage top, suppress, sinusoidal form or cockscomb structure heating wire net and the perfect bonding of second adhesive linkage, its effect is: 1) avoiding an intermediate insulating core and thereby reducing production costs, 2) facilitating assembly and bonding of the heat-generating wire mesh to the elastomeric or polymeric film prior to vulcanization or lamination, and 3) allowing for a longer length and high heat exchange surface for the heat-generating wire per flexible heater surface.

Description

Flexible heater with heating wire mesh and production method thereof

Technical Field

The invention belongs to the technical field of flexible heaters, and particularly relates to a flexible heater with a heating wire mesh and a production method thereof.

Background

One of the most important parameters of a flexible heater is the shape of the heating conductor, which makes it resistant to bending without breaking.

As shown in fig. 1 and 2, the oldest and most common technique is to wind one or more wires 1 around an insulating core 2, having temperature resistance and high flexibility, the oldest materials used for the insulating core 2 being asbestos and cotton, and the wires 1 being red copper, constantan, steel or nickel, and then forming a heat generating wire net.

The core material of the insulating core 2 has now been replaced by glass fibres and aramid fibres, the diameter of the wound wire 1 being small, typically between 0.08mm and 0.25 mm. These small diameters are flexible enough for most applications in heating elements, which must be bent because the heating element is to be embedded between two layers of glass fibre reinforced green rubber, and it is not possible to use straight lines because it does not support the elongation stress due to bending, and then embedded in separate layers of flexible insulating foil.

A second important parameter in the production of flexible heating elements is to maximize the length of the heating wire per surface of the heater in order to better distribute the heat and avoid hot spots. The length of the heating wires is too short and has a poor heat exchange area with the insulating foil embedded therein, because their surface temperature is too high and the insulating foil is burned out, thereby limiting the power density.

Disclosure of Invention

The invention overcomes the defects in the prior art, provides the flexible heater with the heating wire mesh and the production method thereof, reduces the cost and has simple production method.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the utility model provides a flexible heater with heating wire net, includes the first insulation flexfoil of upper surface, be first adhesive linkage below the first insulation flexfoil, be the second adhesive linkage below the first adhesive linkage, be sinusoidal form or cockscomb structure heating wire net between first adhesive linkage and the second adhesive linkage, be the second insulation flexfoil below the second adhesive linkage.

Further, the first bonding layer and the second bonding layer are unvulcanized glue layers.

Further, the first adhesive layer and the second adhesive layer are pressure-sensitive adhesive layers.

Further, the pressure-sensitive adhesive layer is an acrylic or silicone pressure-sensitive adhesive layer.

Further, sinusoidal form or cockscomb structure heating wire net include first connection piece and second connection piece, first sinusoidal form or cockscomb structure heater are connected to first connection piece, first sinusoidal form or cockscomb structure heater are kept away from connect third sinusoidal form or cockscomb structure heater after the one end of first connection piece is buckled, second sinusoidal form or cockscomb structure heater is connected to the second connection piece, second sinusoidal form or cockscomb structure heater are kept away from connect fourth sinusoidal form or cockscomb structure heater after the one end of second connection piece is buckled, third sinusoidal form or cockscomb structure heater are kept away from the one end of first sinusoidal form or cockscomb structure heater with fourth sinusoidal form or cockscomb structure heater are kept away from the one end of second sinusoidal form or cockscomb structure heater is connected.

A production method of a flexible heater with a heating wire mesh comprises the following steps:

1) a first adhesive layer is pasted below the first insulating flexible foil, and a second adhesive layer is pasted above the second insulating flexible foil;

2) placing the sine-shaped or sawtooth-shaped heating wire mesh on the second bonding layer;

3) pressing the sine-shaped or saw-tooth-shaped heating wire net and the second bonding layer, wherein the sine-shaped or saw-tooth-shaped heating wire net is infiltrated into the second bonding layer by the pressure and is firmly bonded;

4) and placing the first adhesive layer above the second adhesive layer, and pressing.

Compared with the prior art, the invention has the beneficial effects that:

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, with the understanding that the present disclosure is to be considered as an exemplification of the invention and is not intended to limit the invention to the embodiments illustrated in the drawings, in which:

FIG. 1 is a schematic structural view of a prior art heat-generating wire mesh;

FIG. 2 is an enlarged view of the position A of FIG. 1;

FIG. 3 is an exploded view of the flexible heater of the present invention;

FIG. 4 is a cross-sectional view of a flexible heater according to the present invention;

FIG. 5 is an enlarged view of the position B of FIG. 4;

fig. 6 is a schematic diagram of the heating wire network structure of the invention.

In the figure, 1-wire; 2-insulating core;

3-heating wire net; 4-a first insulating flexible foil;

5-first adhesive layer; 6-second adhesive layer;

7-a second insulating flexible foil; 8-first connecting tab;

9-second connecting piece; 10-first sinusoidal heating wire;

11-third sinusoidal heating wire; 12-second sinusoidal heating wire;

13-fourth sine-shaped heating wire.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1:

as shown in fig. 3 to 6, a flexible heater with a heating wire net according to the present invention includes a first insulating flexible foil 4 having an upper surface, a first adhesive layer 5 under the first insulating flexible foil 4, a second adhesive layer 6 under the first adhesive layer 5, a sine-shaped heating wire net 3 between the first adhesive layer 5 and the second adhesive layer 6, and a second insulating flexible foil 7 under the second adhesive layer 6, wherein the heating wire net 3 is formed of a single resistive alloy, is adapted to a heating power to be obtained, is subjected to a heat treatment to have a necessary flexibility, and is automatically folded in a forming machine to obtain a desired shape. The sinusoidal size is calculated from the width of the flat flexible heater.

If necessary, after forming in the rolling mill, the thickness of the zigzag or sinusoidal heat generating wire can still be reduced by the rolling mill, and then the wire is flattened while maintaining its zigzag or sinusoidal shape.

The sinusoidal or zigzag shape of the heating wire mesh 3 allows its extension during bending, although this extension can only be in one direction, but is sufficient for most flexible elements, which are usually wound on the surface of a cylinder as in the prior art, such as a tube or drum.

Sinusoidal form heating wire net 3 includes first connection piece 8 and second connection piece 9, first sinusoidal form heater 10 is connected to first connection piece 8, first sinusoidal form heater 10 is kept away from the one end of first connection piece 8 and is connected third sinusoidal form heater 11 after buckling, second sinusoidal form heater 12 is connected to second connection piece 9, second sinusoidal form heater 12 is kept away from the one end of second connection piece 9 and is connected fourth sinusoidal form heater 13 after buckling, the one end that first sinusoidal form heater 10 was kept away from to third sinusoidal form heater 11 and the one end that second sinusoidal form heater 12 was kept away from to fourth sinusoidal form heater 13 are connected.

1) a first adhesive layer 5 is adhered to the lower surface of the first insulating flexible foil 4, and a second adhesive layer 6 is adhered to the upper surface of the second insulating flexible foil 7;

2) placing the sine-shaped heating wire net 3 on the second adhesive layer 6;

3) pressing the sine-shaped heating wire net 3 and the second adhesive layer 6, wherein the sine-shaped heating wire net 3 is infiltrated into the second adhesive layer 6 by the pressure and is firmly adhered;

4) the first adhesive layer 5 is placed over the second adhesive layer 6 and pressed.

Example 2:

the present embodiment is substantially the same as the technical solution of embodiment 1, and the same parts are not described again, except that:

the heating wire net 3 is a zigzag heating wire net 3, the heating conductor can be easily and manually paved on the insulating flexible foil by a sine-shaped or zigzag heating wire, and in the application process, the heating conductor can be perfectly bonded because the heating conductor is in a sine-shaped or zigzag shape.

Example 3:

the first adhesive layer 5 and the second adhesive layer 6 are uncured rubber layers, and in step 4) of the production method, a heat curing process is performed after pressing.

Example 4:

the first adhesive layer 5 and the second adhesive layer 6 are pressure-sensitive adhesive layers which are acrylic or silicone pressure-sensitive adhesive layers, and then between the two layers, the heating wire net 3 is entirely laminated for producing a flexible heating element composed of a flexible polymer sheet (e.g., PET, polyimide, PVC).

Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a flexible heater with heating wire net which characterized in that, includes the first insulating flexible foil of upper surface, be first adhesive linkage below the first insulating flexible foil, be the second adhesive linkage below the first adhesive linkage, be sinusoidal or cockscomb structure heating wire net between first adhesive linkage and the second adhesive linkage, be the second insulating flexible foil below the second adhesive linkage.

2. The flexible heater with the heat-generating wire mesh of claim 1, wherein the first adhesive layer and the second adhesive layer are layers of uncured glue.

3. The flexible heater with the heat-generating wire mesh of claim 2, wherein the first adhesive layer and the second adhesive layer are pressure-sensitive adhesive layers.

4. The flexible heater with the heating wire net of claim 3, wherein the pressure sensitive adhesive layer is an acrylic or silicone pressure sensitive adhesive layer.

5. The flexible heater with the heating wire net according to claim 1, the sine-shaped or saw-toothed heating wire net comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with the first sine-shaped or saw-toothed heating wire, one end of the first sine-shaped or sawtooth-shaped heating wire, which is far away from the first connecting sheet, is bent and then connected with a third sine-shaped or sawtooth-shaped heating wire, the second connecting sheet is connected with a second sine-shaped or sawtooth-shaped heating wire, one end of the second sine-shaped or sawtooth-shaped heating wire, which is far away from the second connecting sheet, is bent and then connected with a fourth sine-shaped or sawtooth-shaped heating wire, one end of the third sine-shaped or sawtooth-shaped heating wire, which is far away from the first sine-shaped or sawtooth-shaped heating wire, is connected with one end of the fourth sine-shaped or sawtooth-shaped heating wire, which is far away from the second sine-shaped or sawtooth-shaped heating wire.

6. The method for producing a flexible heater with a heating wire net according to any one of claims 1 to 5, comprising the steps of:

7. The method for manufacturing a flexible heater with a heating wire net according to claim 6, wherein when the first adhesive layer and the second adhesive layer are uncured adhesive layers, a heat curing process is performed after the pressing in step 4).