JPH0948953A - Method and apparatus for thermal adhesion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the uniform and efficient heating of a laminate comprising two members bonded to each other with an adhesive by holding the laminate with a laminate holder installed on a heating roll and heating the laminate under pressure. SOLUTION: A laminate 1 comprising at least two members bonded to each other with an adhesive is held by one of semicylindrical laminate holders 3 which extend in the longitudinal direction of a heating roll 2 and are installed along the circumference of the roll 2. While the roll 2 is kept at 220-300 deg.C and rotated in the direction of the arrow, a pressing mean 4 installed corresponding to the holder 3 is rotated at the same cycle as the roll 2 to press the laminate 1 for 3-5min to cure the adhesive. Then the laminate 1 is separated from the pressing means 4 to be freed from pressing and taken out of the holder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat bonding method and a heat bonding apparatus used for the method. More specifically, when two members are superposed with an adhesive and heated and pressed to bond them, uniform and efficient heating is possible, and at the same time, plural sets of members can be bonded continuously. The present invention relates to a heat bonding method excellent in bonding accuracy and bonding cost, and a heat bonding apparatus used for the method.

[0002]

2. Description of the Related Art Generally, as a method of adhering two members to be adhered with an adhesive, both members are superposed on each other via an adhesive and pressure-integrated by a jig, and then pressure-integrated. A heat-bonding method is used in which a tunnel-type heating furnace is passed through as it is, and the adhesive is heated and melted or heat-cured inside the heating furnace to bond both members.

For example, in the method of manufacturing a brake shoe assembly used for a drum brake, the work of adhering the brake shoe body and the lining with an adhesive is performed by applying a thermosetting adhesive and drying the brake shoe body and the lining. Are set in a pressure jig and heated with hot air in a heating and curing oven to cure the thermosetting adhesive.

However, when the thermosetting adhesive is hardened by heating with hot air, the heat transfer efficiency is poor, so that rapid hardening is difficult to perform, and unnecessary parts such as jigs, conveyors, and furnace walls are also heated. There is a problem that the agent application part cannot be efficiently heated. As a means for solving such problems, downsizing the equipment, and speeding up the heat treatment, JP-A-61-153026 proposes a method using a high frequency induction heating method. According to this method, the heat treatment can be speeded up, but this method has a problem that the heating efficiency is low because of indirect heating by an eddy current. Further, in order to uniformly heat the brake shoe body having a complicated shape, there is a problem that the shape of the coil and the equipment become complicated.

[0005]

SUMMARY OF THE INVENTION The present invention is capable of quickly adhering a shoe rim of a brake shoe main body to a lining by heating and pressurizing with an adhesive and has a high heating efficiency. An object of the present invention is to provide a heat-bonding method and a heat-bonding apparatus used for the heat-bonding method capable of continuously manufacturing a plurality of bonded products with simple equipment.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have used a heating roll having a laminated body holder arranged on the surface as a heat source for heating.
It has been found that uniform and efficient heating is possible by holding the laminate to be bonded in surface contact with the laminate holder and heating by heat conduction from a heating roll. It is also possible to bond a plurality of laminated bodies continuously by disposing a plurality of laminated body holders on the heating roll, holding the plurality of laminated bodies by each laminated body holder, and rotating the heating roll. I found a thing. Based on these findings, the present inventors have completed the present invention.

That is, the present invention is a heating and bonding method in which a laminated body in which at least two members are laminated with an adhesive is pressed and heated to bond at least two members with the adhesive, and a heated heating roll is used. The state where the laminated body is held by the laminated body holder arranged on the outer circumference of the roll, and at least one member of the laminated body is brought into contact with the laminated body holder and the laminated body is heated by the heat conducted from the heating roll to the one member The heat-bonding method is characterized in that the laminated body is pressed with.

Further, according to the present invention, as an apparatus preferably used in the above heat-bonding method, at least a heating roll and a laminate in which at least two members are laminated via an adhesive are disposed on the outer circumference of the heating roll. It comprises a laminated body holder that is held in contact with one member, and a pressurizing means that pressurizes the laminated body in close proximity to the laminated body held by the laminated body holder and releases the pressure applied to the laminated body. The present invention provides a heat-bonding device having the characteristics.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the heat-bonding method and heat-bonding apparatus of the present invention, the material of the heating roll is preferably metal such as iron, steel, aluminum or aluminum alloy, which has excellent thermal conductivity. As a heating method of the heating roll, a method of heating the heating medium filled in the heating roll, a method of energizing the heating roll by using a slip ring to heat the heating roll itself, and the like are usually used, and the roll is uniformly used. Any heating method can be used without particular limitation.

From the viewpoint of energy saving and excellent temperature uniformity, an induction coil is incorporated in the core of the roll,
A method of applying induction voltage to the coil to apply a voltage to the coil to induce heat generation is suitably adopted. For example, a roll shell forming a roll outer shell, an induction coil including a core and a coil having a roll shaft as an axis incorporated in the roll, a roll provided in a roll shell and containing a gas-liquid two-phase heat medium A heating roll having a plurality of cavities parallel to the axial direction of which the outer shell of the roll self-heats when a voltage is applied to the coil is preferably adopted. In this heating roll, the gas-liquid two-phase heating medium serves to make the temperature distribution on the roll surface uniform while constantly repeating the cycle of evaporation and condensation in the cavity in the roll shell. A specific example of such a heating roll is an induction heating jacket roll (trade name) manufactured by Tokuden Co., Ltd.

The shape of the laminated body holder is not particularly limited as long as at least one member of the laminated body can be held in contact with the laminated body holder, and can be designed according to the shape of the laminated body. The material of the laminated body holder is not particularly limited as long as it is a material that conducts heat from the heating roll to the member in contact with the laminated body holder, and usually, iron, steel,
Metals such as aluminum and aluminum alloys are suitable.

Further, the laminated body holder may hold only one laminated body or may hold a plurality of laminated bodies, and the shape, size, and heating roll of the laminated body may be held. It can be appropriately selected according to the size and the like. For example,
By arranging a plurality of laminated body holders that hold a plurality of laminated bodies side by side in the lengthwise direction of the heating roll in parallel in the roll circumferential direction of the heating roll, a large number of laminated bodies can be heat-bonded at the same time.

Further, the heating roll is rotated about the roll axis, and when the laminated body holder is located at one point of the rotational movement, for example, at the upper part of the rotational movement, the laminated body is held in the laminated body holder and heated and heated. By starting the pressure and releasing the pressure at other points of the rotary motion, for example, at the time of being located at the lower end of the rotary motion and taking out the stack from the stack holder, a large number of stacks can be continuously stacked. Can be glued.

The laminated body holder may be formed integrally with the outer shell of the heating roll, or
What was formed separately from the heating roll may be arranged so that the bottom surface is in contact with the outer peripheral surface of the roll of the heating roll, or it may be arranged by being fitted into the outer shell of the roll.

From the viewpoint of heat transfer efficiency, it is preferable that the member to be heat-bonded has a metal member that comes into contact with the laminated body holder when held in the laminated body holder. The adhesive is not particularly limited, and may be selected from various adhesives such as a solvent volatilizing adhesive, a thermosetting adhesive, and a hot melt adhesive depending on the material of the member, the application of the adhesive after adhesion, and the like. It can be appropriately selected.

[0016]

EXAMPLES The heat-bonding method and heat-bonding apparatus of the present invention will be described below based on Examples, but the present invention is not limited thereto.

In this embodiment, a brake shoe assembly used for a vehicle drum brake is manufactured by the heat bonding method and the heat bonding apparatus of the present invention.

FIG. 1 is an oblique explanatory view showing an embodiment of the heating and bonding apparatus of the present invention, and FIG. 2 is an enlarged view of a portion surrounded by an alternate long and short dash line ellipse in FIG. The laminated body 1 which is the object of this embodiment is a shoe rim 111 of the brake shoe body 11.
Lining 1 on the outer peripheral surface of thermosetting adhesive 114
13 is laminated.

The brake shoe main body 11 comprises a curved plate-shaped shoe rim 111 and shoe ribs 112 attached to the shoe rim 111 in a T-shape by welding or the like. The material of the brake shoe body 11 is metal, and for example, SPC steel plate is preferably used, but other materials such as aluminum and aluminum alloy can also be used. The lining 113 constitutes the friction surface of the brake shoe assembly and is made of a non-metallic material. As the lining 113, for example, one obtained by mixing short fibers such as asbestos and glass fibers with a binder of a thermosetting resin and pressurizing and heating to form a curved plate shape is used.

Brake shoe body 11 shoe rim 11
Adhesive 11 is previously attached to the outer peripheral surface of No. 1 and the inner surface of lining 113
4 is applied and the adhesive 114 is dried by hot air drying or the like, and then the shoe rim 111 and the lining 113 are laminated via the adhesive 114 to obtain a laminated body 1. Adhesive 114
Usually, a thermosetting adhesive is used, and for example, a phenol resin-based or epoxy resin-based thermosetting adhesive having high resistance to impact, bending, and peeling is preferably used.

The heating and bonding apparatus shown in FIGS. 1 and 2 comprises a heating roll 2, a laminated body holder 3 and a pressing means 4 as main parts.

The laminated body holders 3 are of a semi-cylindrical shape extending in the lengthwise direction of the heating roll 2, and eight of them are arranged in parallel in the circumferential direction of the heating roll 2. Each laminated body holder 3 can hold a plurality of laminated bodies 1 (only one set of laminated bodies is shown in FIGS. 1 and 2) arranged side by side in the length direction of the heating roll.

FIG. 3 is an enlarged cross-sectional view showing a state where the laminated body 1 is held by the laminated body holder 3 and pressed by the pressing means 4 in the portion surrounded by the one-pointed left-pointing ellipse of FIG. A mounting portion 3 for mounting the laminated body 3 on the laminated body holder 3
1 is provided. The mounting portion 31 is the laminated body holder 3
A plurality of them are provided adjacent to each other in the length direction of the laminated body 1, and the curved rib contact surface 311 on which almost the entire back surface of the shoe rim 111 of the brake shoe body 11 of the laminated body 1 abuts, and the shoe rib 112 can be inserted. The thin groove 312 is formed.

The pressurizing means 4 includes a pressurizing band 41 formed of a spring material or the like in a curved shape corresponding to the contact surface 311 of the mounting portion 31 of the laminated body holder 3, and a pressurizing member for supporting the pressurizing band 41. It has a band holder 42. Both ends of the pressure band 41 are supported by the pressure band holders 42, and the pressure region in the central portion has spring elasticity. The pressurizing means 3
May have a single structure corresponding to all of the plurality of mounting portions 31 of the laminated body holder 3, or a plurality of structures individually corresponding to the plurality of mounting portions 31 of the laminated body holder 3. You can also do it. In FIG. 1, the pressing means 4 is shown only on the upper part of one laminated body holder 3, but it is arranged corresponding to all the laminated body holders 3.

The heating roll 2 and the laminated body holder 3 include:
It is preferable to connect a sensor for detecting each temperature and manage the heating and bonding operation so that the temperature of the laminated body holder 3 is maintained at a temperature suitable for bonding during pressurization.

The temperature of the heating roll 2 is the shoe rim 111.
The shoe rim 111 is usually heated to 220 to 300 ° C. by heat conduction, but it is preferably selected depending on the material.

By using the heat-bonding device shown in FIG. 1, it is possible to heat-bond a large number of laminates 1 at the same time, and continuous operation is also possible.

For example, the apparatus shown in FIG. 1 is installed so that the roll axis of the heating roll 2 is vertical, all the laminated bodies 1 are held by all the laminated body holders 3, and all the laminated bodies 1 are pressurized at the same time. By heating and bonding, a plurality of laminated bodies 1 can be bonded by a batch method. Further, the apparatus shown in FIG. 1 is installed such that the roll axis of the heating roll 2 is horizontal, the heating roll 2 is rotated about the roll axis, and when the laminated body holder 3 reaches the upper part of the rotational movement, the lamination is performed. It is also possible to carry out heat bonding continuously by mounting the body holder 3 and starting pressurization, and releasing the pressurization when the lower part of the rotary motion is reached and taking out the laminate 1.

FIG. 4 shows a state in which the heating roll 2 rotatable about the roll axis is installed so as to be horizontal to the roll axis, and a plurality of laminates are continuously heat-bonded by using a heat-bonding device. FIG. 2 is an explanatory diagram showing the above, and corresponds to a front view of the device shown in FIG. 1. In the method shown in FIG. 4, first, a thermosetting adhesive is applied to the outer peripheral surface of the shoe rim 111 of the brake shoe main body 11 and the curved inner surface of the lining 113 in advance, and the thermosetting adhesive is dried in a hot air drying oven. deep. The shoe rim 111 and the lining 113 are laminated via a dry thermosetting adhesive to prepare the laminated body 1.

The heating roll 2 is rotated in the direction of the arrow, and the pressing means 4 arranged corresponding to each laminated body holder 3 is also
It is rotated at the same cycle as the heating roll 2. As the heating roll 2 rotates, the shoe ribs 112 of the brake shoe body 11 of the laminated body 1 are sequentially inserted into the narrow grooves 312 of the laminated body holder 3 in the laminated body holder 3 that has reached the position indicated by A in FIG. The laminated body 1 is held by the laminated body holder 3 by bringing almost the entire back surface of the 111 into contact with the contact surface 311 of the laminated body holder 3. After holding the laminate 1,
The heating roll 2 and the pressing means 4 are rotated in the same cycle, and the pressing means 4 is brought close to the laminated body 1 held by the laminated body holder 3 to press the laminated body 1. At this time, by the pressure band 41 of the pressure means 4, the shoe rim 111 and the lining 113 are adhesive (not shown) over the entire joint surface.
Is uniformly pressure-engaged via. The pressure at this time is usually 7 kg / cm ² or more, preferably 7 to 10 kg / cm ^2.
It is preferable that The pressurization by the pressurizing means 4 is continued until the laminated body holder 3 reaches the lower end of the rotational position shown by B in the figure with the rotation of the heating roll 2. When the laminated body holder 3 reaches the position B, the pressing means 4 is separated from the laminated body 1 to release the pressure, and the laminated body 1 that has been bonded is taken out from the laminated body holder 3. Meanwhile, shoe rim 11
1 is heated to 220 to 300 ° C. by heat conduction from the laminated body holder 3 on the heating roll 2, and the thermosetting adhesive is cured in a heating time of 3 to 5 minutes, so that sufficient adhesive strength is exhibited. . Therefore, the rotation cycle of the heating roll 2 is set such that the laminated body 1 is held by the laminated body holder 3 at the A position and heated at 220 to 300 ° C. for 3 to 5 minutes until it is taken out at the B position.

According to such a manufacturing method, the shoe rim is heated by the heat conduction due to the contact from the heating roll, so that the energy efficiency is high and a large number of brake shoe assemblies can be manufactured simultaneously and continuously. Therefore, the productivity is high, and the shoe rim and the lining can be bonded uniformly and extremely quickly, which is excellent in workability.

[0032]

According to the heat-bonding method and heat-bonding apparatus of the present invention, it is possible to quickly bond the shoe rim of the brake shoe main body with the lining by heating and pressing with an adhesive. The heating efficiency is good, and it is possible to continuously manufacture a plurality of adhesives with simple equipment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a heating and bonding apparatus of the present invention.

FIG. 2 is an enlarged view of a portion surrounded by an alternate long and short dash line ellipse in FIG.

FIG. 3 is an enlarged front sectional view of a portion surrounded by the alternate long and short dash line ellipse in FIG.

FIG. 4 is a diagram showing one embodiment of a heat bonding method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laminated body 11 Brake shoe main body 111 Shoe rim 112 Shoe rib 113 Lining 114 Adhesive 2 Heating roll 3 Laminated body holder 31 Mounting part 311 Abutment surface 312 Fine groove 4 Pressing means 41 Pressing band 42 Pressing band holder

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B29L 31:16

Claims (11)

[Claims] 1. A laminated body in which at least two members are laminated via an adhesive is pressurized and heated, and at least 2 is formed by the adhesive.
In the heating and bonding method of bonding two members, the laminated body is held by the laminated body holder arranged on the outer circumference of the heated heating roll, and at least one member of the laminated body is brought into contact with the laminated body holder to remove the heat from the heating roll. A heat-bonding method, characterized in that the laminate is pressed while being heated by the heat conducted to the one member. 2. The heat-bonding method according to claim 1, wherein a plurality of laminated bodies are arranged in the length direction of the heating roll and held by a laminated body holder. 3. The heat-bonding method according to claim 2, wherein a plurality of laminate holders for holding a plurality of laminates arranged side by side in the lengthwise direction of the heating roll are arranged in parallel in the roll circumferential direction of the heating roll. 4. A laminate roll is held by the laminate holder when the heating roll is rotated about the roll axis and the laminate holder is located at the upper part of the rotary motion, and then pressurization is started. The heating and bonding method according to claim 3, wherein the pressing of the laminated body held by the laminated body holder is stopped at the time when is located at the lower end of the rotational movement, and the plurality of laminated bodies are taken out from the laminated body holder. 5. The heat bonding method according to claim 1, wherein the laminated body has a lining laminated on the outer peripheral surface of the shoe rim of the brake shoe body via a thermosetting adhesive. 6. A heating roll, a laminated body holder arranged on the outer periphery of the heating roll, and a laminated body in which at least two members are laminated with an adhesive interposed between them and held in contact with at least one of the members. A heat-bonding device comprising: a pressurizing unit that pressurizes the laminated body in proximity to the laminated body held by a holder and releases the pressure from the laminated body by separating the laminated body. 7. The heating and bonding apparatus according to claim 6, wherein the laminated body holder holds a plurality of laminated bodies side by side in the lengthwise direction of the heating roll. 8. A plurality of laminate holders for holding a plurality of laminates arranged side by side in the length direction of the heating roll are arranged in parallel in the roll circumferential direction of the heating roll, and have a plurality of pressing means. 7. The heating and bonding apparatus according to 7. 9. The heating and bonding apparatus according to claim 6, wherein the heating roll is rotatable about the roll axis, and the pressurizing unit is rotatable at the same cycle as the heating roll. 10. A laminated body is obtained by laminating a lining on an outer peripheral surface of a shoe rim of a brake shoe body via a thermosetting adhesive, and a laminated body holder is provided on at least a part of a back surface of the shoe rim of the brake shoe body. The pressurizing means has a curved contact surface that can be in close contact and at least one narrow groove into which the shoe rib can be inserted, and the pressing means has a curved surface that corresponds to the contact surface of the mounting portion of the laminated body holder. The heating and bonding apparatus according to claim 6, further comprising a pressure band and a pressure band holder that supports the pressure band. 11. A heating roll is provided in a roll shell that forms a roll shell, an induction coil that is built into the roll and that includes a core having a roll axis as a shaft and a coil, and a roll shell. The roll outer shell has a plurality of cavities parallel to the axial direction of the roll in which the heat medium is enclosed, and the roll outer shell self-heats when a voltage is applied to the coil.
0. The heating and bonding apparatus as described in any one of