JPH0617011A - Automated bonding using double-coated tape - Google Patents

Abstract

PURPOSE:To perform automated bonding inexpensively in a good working environment without using any heating furnace by releasing a first mount only from the pressure-sensitive adhesive and the tab tape and successively pressing the pressure-sensitive adhesive between slits against the adherends. CONSTITUTION:The bonding process comprises providing a first strip mount 14, a pressure-sensitive adhesive material 15 bonded to the mount 14 and having a width smaller than that of the mount 14, a second strip mount 16 bonded to the adhesive material 15 and a tab tape 17 bonded to the first mount 14 and the second mount 16 with an adhesive force greater than that of the adhesive material 15 and formed so that it may entirely cover the mount 16 and the adhesive material 15, forming slits so that they may fully and longitudinally cut the adhesive material 15 and the mount 16, releasing the first mount paper 14 only from the adhesive material 15 and the tab tape 17 and successively pressing those parts of the adhesive material 15 which lie between the slits against the adherends. The automated bonding can be effected inexpensively in a good working environment without using any heating furnace.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved automatic bonding method using a double-sided tape.

[0002]

2. Description of the Related Art A conventional bonding method of this type will be described with reference to FIGS. FIG. 11 is a sectional view showing a stator of a conventional flat motor. In the figure, 1 is a stator and 2 is a stator.
Is a bowl-shaped bracket that constitutes this stator, and has a through hole 2a formed in the center, into which a rotation shaft (not shown) can be inserted. Reference numeral 3 is a ring-shaped permanent magnet fixed to the inner peripheral surface of the bracket, and has a through hole 3a formed in the center.
Reference numeral 4 denotes a double-sided adhesive material for fixing the permanent magnet 3 to the inner peripheral surface of the bracket 2, which has a thermosetting epoxy adhesive material described later. 12 and 13 are a plan view and a sectional view, respectively, showing a conventional double-sided adhesive tape having this epoxy adhesive material. In each drawing, 40 is a paper mount, and 4 is a space between these mounts. The double-sided adhesive material is a thermosetting epoxy-based adhesive material that is mounted. The double-sided adhesive material 4 and the mount 40 form a double-sided adhesive tape 7.
As shown in FIG. 12, the double-sided adhesive material 4 has a circular shape at the center and a substantially square outer shape.
Glued to one side.

Next, in the flat motor stator thus constructed, a method of adhering the permanent magnet 3 to the bracket 2 by the double-sided adhesive 4 will be described. First, the double-sided adhesive tape 7 is formed into a shape as shown in FIG.
40 is peeled off and bonded to the permanent magnet 3 with the adhesive material 4. After that, the other mount 40 is peeled off, and the bracket 2 is lightly pressed by the adhesive 4 to be temporarily adhered to the inner peripheral surface. In this way, the permanent magnets 3 temporarily bonded to the inner peripheral surface of the bracket 2 are placed in a heating furnace in a state of 8 to 10 pieces of the permanent magnets being stacked and pressed together by a jig.

This state is shown in FIG. In FIG. 14, 8 is a spacer mounted between the bracket 2 and the permanent magnet 3, and has a through hole 8a in the center. Reference numeral 9 is a fixing bolt, 10 is a nut screwed to the bolt, 11 is a compression coil spring, and the permanent magnets 3 are pressed against the bracket 2 via the double-sided adhesive material 4. Reference numerals 12 and 13 denote spring receivers for receiving the spring 11. Put the pressure-bonded product in this way into the heating furnace.
Heat to around 0 ° C. The double-sided adhesive material 4 is melted by this heating, and the permanent magnet 3 is fixed to the inner peripheral surface of the bracket 2 by the pressure contact force. Then, cool, bolt 9, nut
10, spring 11, spring receiver 12, 13, spacer 8
Remove the stator from the jig.

[0005]

According to the conventional bonding method, after the double-sided adhesive material 4 of the permanent magnet 3 is temporarily bonded, pressure is applied by a jig, and heating work in a heating furnace is often performed manually, which is automated. It is difficult, requires a heating furnace, requires a large electricity bill, is high in cost, and has a problem in that it requires heat work and the working environment is poor. Also, the permanent magnet used in the stator of this type of motor is weak against thermal shock,
If the cooling speed is high, there is a problem that cracks are likely to occur in the thickness direction.

The present invention has been made to solve the above-mentioned problems, and since a double-sided tape can be attached to a permanent magnet by an automatic machine and the permanent magnet can be fixed to a bracket at room temperature, no heating furnace is required. Therefore, it is an object of the present invention to provide an automatic bonding method that is low in cost, has a good working environment, and can prevent the permanent magnet from cracking due to thermal shock.

[0007]

According to the present invention, there is provided a strip-shaped first mount, a pressure-sensitive adhesive which is adhered onto the mount and has a width smaller than that of the first mount, and the pressure-sensitive adhesive. With a band-shaped second mount that is adhered to the first mount, and the first mount and the second mount that completely cover the mount and the pressure-sensitive adhesive, and that have adhesive strengths that are greater than the adhesive strength of the adhesive. The pressure-sensitive adhesive and the second mount are provided with slits so as to completely cut the pressure-sensitive adhesive and the second mount, and then the first tape is attached.
Peel off the pressure sensitive adhesive and the tab tape from
After that, the pressure-sensitive adhesive between the slits is sequentially pressed and adhered to the adherend.

Further, in another method of the present invention, the adherend is a permanent magnet, and the pressure-sensitive adhesive is sequentially adhered to the permanent magnet, and then the remaining second mount and the tab tape are attached. It was made to wind up.

[0009]

In the bonding method according to the present invention, the pressure-sensitive adhesive material can be sequentially pressure-bonded to the object to be bonded at room temperature, so that it can be automated and does not require a heating furnace. Further, according to another bonding method of the present invention, the pressure-sensitive adhesive material can be reliably bonded to the fixed surface of the permanent magnet at room temperature.

[0010]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 2, 14 is a band-shaped first mount, the surface of which is coated with silicon. Reference numeral 15 is an acrylic pressure-sensitive adhesive material that is adhered onto this mount and has a width smaller than that of the first mount, and has elasticity, viscosity, and non-hardening properties. Reference numeral 16 is a band-shaped second mount that is adhered onto this adhesive material, and 17 is a first mount that is mounted on both sides of the pressure-sensitive adhesive material 15 and the second mount 16 on the first mount paper 14, respectively. A tab tape composed of a vinyl tape 17a and an adhesive material 17b.

Numeral 18 indicates that the second mount 16 is completely covered,
A second tab tape adhered to the second mount 16 on the first tab tape 17, which is composed of a vinyl tape 18a and an adhesive material 18b. These first and second tab tapes 17,
The adhesive strength of the adhesive material 18b of 18 is greater than the adhesive strength of the pressure-sensitive adhesive material 15 described above.

Reference numeral 19 denotes the first mount 14, the pressure-sensitive adhesive 15, the second mount 16, and the first mount 14 so as to completely cut the pressure-sensitive adhesive 15 and the second mount 16 in the longitudinal direction. The slits are formed by penetrating the tab tape 17 and the second tab tape 18.

The method of manufacturing the double-sided adhesive tape having the above-described structure is as follows. First, the first strip-shaped mount 14, the first tab tape 17,
The second tab tape 18 is cut into a predetermined width and pressed in advance to form a tab tape subassembly. The second mount 16 and the pressure-sensitive adhesive material 15 are prepared by slitting the original acrylic adhesive tape. Then the first mount
Acrylic adhesive tape consisting of pressure-sensitive adhesive material 15 and second mount 16 on 14; first tab tape 17 on second tab tape
Attach the tab tape that is a subassembly of 18. Thereafter, the three tapes are pressed by rollers to form a tape having a three-layer structure as shown in FIG. Next, the tape having the three-layer structure is fed at a predetermined pitch, and an oval slit 19 penetrating all of the three-layer tape is punched by a press. The corners of the slit 19 are rounded to prevent the mounts 14 and 16 from breaking.

Next, a process of adhering the pressure-sensitive adhesive material 15 to the permanent magnet 3 of the stator of the flat motor by the automatic machine from the tape having the three-layer structure will be described with reference to FIGS. 3 to 5. . First, in FIGS. 3 to 5, 20 is a reel formed by winding the above three-layer structure tape, 21 is an idler for sending the three-layer structure tape taken out from this reel, and 22 is a three-layer structure tape. , An idler for removing only the first mount 14, a take-up reel 23 for winding the peeled first mount 14 by passing through the idler,
24 is a drive shaft that pulls the mount, 25 is a rubber roller,
They are mounted between the idler 21 and the take-up reel 23, respectively. 26 is a sticking roller, which is made of urethane rubber. The pressure-sensitive adhesive material 15 is attached to the permanent magnet 3 at four positions, and can be rotated and moved up and down. 27 is a second mount 16, via idlers 28, 29,
It is a take-up reel for taking up the first and second tab tapes 17 and 18.

In the thus constructed device, first,
The reel 20 on which the three-layered tape is wound is rotationally driven to take out the tape, and at the mounting position of the idler 22, only the first mount 14 is peeled off. The peeled off first mount 14 is taken up by the take-up reel 23 via the drive shaft 24 and the rubber roller 25. The tape from which the first mount 14 has been peeled off has the pressure-sensitive adhesive material 15 exposed at the bottom,
The pressure-sensitive adhesive material 15 is pressed downward by the sticking roller 26 and adhered to the permanent magnet 3 located at the lower part of the sticking roller 26, the entire device moves to the right, and the sticking roller 26 is moved to the arrow in FIG. By moving in the direction, the pressure-sensitive adhesive material 15 is sequentially bonded to the permanent magnet 3 and cut into a predetermined length by the slit 19. After that, as shown in FIG. 5, the apparatus rises and the permanent magnet 3 rotates until the next pressure-sensitive adhesive material 15 reaches the lower part of the sticking roller 26, and the pressure-sensitive adhesive material 15 is pressed and adhered at the next position. To be done. By repeating this process, the pressure-sensitive adhesive material 15 is adhered to the permanent magnet 3 at four positions at equal intervals over the entire circumference as shown in FIG. After this, the sticking device moves to the right side of FIG. 5, the permanent magnet 3 having completed the adhesion is removed, and when the permanent magnet 3 is newly set, the sticking device moves to the left side and then descends, Repeat the sticking process of. The tape from which the pressure-sensitive adhesive material 15 has been peeled off is taken up by the take-up reel 27 via the idlers 28 and 29.

Next, the permanent magnet 3 to which the pressure-sensitive adhesive material 15 is attached is pressed while being mounted on the bracket 2.
This state is shown in FIG. In FIG. 7, 30 is an upper movable jig and 31 is a lower fixed jig.
The bracket 2, the pressure-sensitive adhesive material 15, and the permanent magnet 3 are mounted between them, and they are pressed at room temperature with a predetermined load. Since the acrylic pressure-sensitive adhesive material 15 is viscous even at room temperature and does not harden, the permanent magnet 3 can be completely bonded to the inner peripheral surface of the bracket 2 by the above pressure. Moreover, there is a useful adhesive force immediately after the pressurization, and the work of the next step can be performed very quickly.

Example 2. Although the first and second tab tapes 17 and 18 are used in the above description, the first tab tape 17 may be omitted as shown in FIG.
The same effect can be achieved with 18 alone.

Example 3. Further, as shown in FIGS. 9 to 10, the first tab tape 17 is omitted and the second tab tape 17 is omitted.
The width of 32 may be smaller than the width of the second mount 16. Figure 9
10 to 32, 32 is a second tab tape, 32a is a vinyl tape constituting the tab tape, and 32b is an adhesive material. According to this structure, the width of the first mount can be reduced, so that the cost is low, and it is not necessary to provide the slit 19 in the second tab tape 32.

Example 4. Further, the pressure-sensitive adhesive material 15 may be formed integrally with the non-woven paper.

[0020]

As described above, according to the present invention, a strip-shaped first mount, a pressure-sensitive adhesive that is adhered to the mount and has a width smaller than that of the first mount, and the adhesive is provided on the adhesive. Adhesive band-shaped second mount, and the first mount and the second mount that completely cover the mount and the pressure-sensitive adhesive material, and are bonded to the first mount and the second mount with an adhesive strength greater than the adhesive strength of the adhesive material. Provided with a tab tape, and a slit is formed so as to completely cut the pressure-sensitive adhesive and the second mount in the longitudinal direction, and then only the first mount is peeled off from the pressure-sensitive adhesive and the tab tape. After that, since the pressure-sensitive adhesive between the slits is sequentially pressure-bonded to the adherend, the pressure-sensitive adhesive can be sequentially pressure-bonded to the adherend at room temperature, which allows automation and heating. A practical environment that does not require a furnace, which improves the working environment and reduces costs. It has an effect.

According to another method of the present invention, the adherend is a permanent magnet, and the pressure-sensitive adhesive is sequentially adhered to the permanent magnet, and then the remaining second mount and tab tape are wound up. By doing so, the pressure-sensitive adhesive can be easily and surely adhered to the fixed surface of the permanent magnet, the cost of the device can be reduced, and defects due to cracking of the permanent magnet can be eliminated.

[Brief description of drawings]

FIG. 1 is a plan view of a double-sided adhesive tape according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view showing a step of adhering a pressure-sensitive adhesive material according to an embodiment of the present invention.

FIG. 4 is a partially enlarged front view showing a bonding step according to an embodiment of the present invention.

FIG. 5 is a partially enlarged front view showing the bonding step according to the embodiment of the present invention.

FIG. 6 is a plan view showing a structure in which a pressure-sensitive adhesive material according to an embodiment of the present invention is bonded to a permanent magnet.

FIG. 7 is a sectional view showing a process of adhering a permanent magnet of a stator of a flat motor by pressurizing a pressure-sensitive adhesive material according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a double-sided adhesive tape according to another embodiment of the present invention.

FIG. 9 is a plan view showing a double-sided adhesive tape according to still another embodiment of the present invention.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a sectional view showing a stator of a conventional flat motor.

FIG. 12 is a plan view showing a relationship between a conventional permanent magnet and a double-sided adhesive tape.

FIG. 13 is a cross-sectional view showing a conventional double-sided adhesive tape.

FIG. 14 is a cross-sectional view showing a step of bonding a permanent magnet to a bracket of a conventional flat motor.

[Explanation of symbols]

 1 Stator 2 Bracket 3 Permanent magnet 3a Through hole 14 First mount 15 Pressure sensitive adhesive 16 Second mount 17 First tab tape 17a Vinyl tape 17b Adhesive 18 Second tab tape 18a Vinyl tape 18b Adhesive 19 Slit 20 reel 21 idler 22 idler 23 take-up reel 24 drive shaft 25 rubber roller 26 sticking roller 27 take-up reel 28 idler 29 idler 30 movable jig 31 fixing jig 32 second tab tape 32a vinyl tape 32b adhesive material

Claims (2)

[Claims] 1. A band-shaped first mount, a pressure-sensitive adhesive material that is adhered onto the mount and has a width smaller than that of the first mount, and a band-shaped second mount adhered onto the adhesive. A tab tape that completely covers the pressure-sensitive adhesive material and is adhered to the first mount paper and the second mount paper with an adhesive force greater than the adhesive strength of the adhesive material, A slit is formed so as to completely cut the pressure-sensitive adhesive material and the second mount in the longitudinal direction, then only the first mount is peeled off from the pressure-sensitive adhesive and the tab tape, and then, An automatic bonding method using a double-sided tape, wherein the pressure-sensitive adhesive material between the slits is sequentially pressure-bonded to an adherend. 2. The object to be adhered comprises a permanent magnet, and the pressure-sensitive adhesive material is successively pressure-bonded to the permanent magnet, and then the remaining second mount and the tab tape are wound up. An automatic bonding method using the double-sided tape according to claim 1.