JPS63120786A - Method of executing bonding, crosslinkable resin composite used for said method and bonding device - Google Patents

Abstract

PURPOSE:To enable rapid crosslinking and vulcanization even when bonding is conducted in a portion, place and large size where it has been impossible to conduct bonding by conventional technique, by placing a conductive heat-generating material along a crosslinkable resin compsn. and passing a current through the heating material to expedite the crosslinking of the resin by making use of the generated heat. CONSTITUTION:A crosslinkable resin composite 10 is interposed between a wooden brick substrate 4 and a wooden barrel flange 5 and between the flange 5 and an interior material 6. The composite 10 comprises an iron foil and a conductive heat- generating material 2 composed of a thermosetting resin applied on both surfaces of the iron foil. A bonding device is allowed to act on the interior material 6 from the side of a room. This bonding device comprises a coil portion 11 for giving a magnetic field energy to the conductive material 2 to generate an eddy current and an electric supply portion 12. A high frequency current is allowed to flow through the coik of the coil portion 11 to generate heat from the conductive material 2. the crosslinkable resin is heated by the generated heat to conduct bonding. The bonding portion is altered to conduct subsequent bonding operation.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is applicable to rubber adhesives that exhibit adhesive properties as a result of vulcanization, phenolic resins, urea resins, melamine resins, xylene resins, epoxy resins, and isocyanate resins. , thermosetting resin adhesives such as unsaturated polyester resins (these are collectively used in the present invention for vibration-proof support, waterproof coating, and crack repair for machines that generate crosslinking).

The present invention relates to a crosslinking method for adhesively assembling building components, adhering rubber materials to each other, and a crosslinkable resin composite used therein.

"Prior Art" Conventionally, when crosslinking resin adhesives are used for the above purposes, they are used at construction sites, maintenance sites, equipment assembly sites, and building repair sites.

Although these are used at rubber product manufacturing sites, there is no suitable heating means to quickly complete the vulcanization and crosslinking of the rubber at the site. Block-shaped or sheet-shaped items were glued together using solvent-based adhesives, or metal fittings were provided and fixed using physical or mechanical means such as screwing or caulking. The installation referred to here means, of course, that the metal fittings and the unvulcanized rubber are heated and pressed in a vulcanizing can or mold to be bonded together during heating and vulcanization (for example, Japanese Patent Publication No. 59-51905). )
Although such fixing means can be used for members that are not large in scale, they cannot be used for rubber materials used in building support structures, ducts, vibration generating equipment, etc.

There were construction sites where cross-linking and vulcanization were impossible using conventional methods due to factors other than size. This is because early vulcanization-simultaneous adhesion and cross-linking thermosetting are desired when assembling rubber materials inside equipment for the purpose of buffering and damping vibrations, or when assembling elastic bodies or construction members into parts of bridges and buildings. There was no such thing.

``Problems to be Solved by the Invention'' Therefore, the present invention has developed a conventional method that enables 9-stage crosslinking and vulcanization by heating even in areas, locations, or large sizes that were previously impossible. This is an attempt to provide an adhesive method that is not available in other countries. Of course, the present invention does not limit the size of the object to be adhered or the object to be vulcanized.

"Means for Solving Problems" Therefore, in order to solve the above-mentioned conventional problems, in the present invention, a conductive heat generating material (2) is added to the crosslinkable resin composition (1).
) is integrated or attached to the member that needs to be integrated using a cross-linkable (three-dimensional, including vulcanized) resin adhesive, and an eddy current is generated by applying electricity or a magnetic field to the conductive heating material (2). Then, they developed an adhesive construction method that uses the heat generated by this to promote crosslinking of the crosslinkable resin and bond it.

The components that need to be integrated with crosslinkable resin adhesives include: ``As mentioned above, adhesives for base materials, decorative boards, floor finishing materials, wall finishing materials, etc. during building construction, and support for structures such as bridges. components, walls and ceilings with cracks.

It also includes the production of vibration-proof element products and the like by adhering rubber to rubber or rubber to other materials, and reducing the time it takes to produce products that were conventionally bonded together.

Furthermore, in the present invention, a crosslinkable resin composite consisting of a crosslinkable resin composition (1) and a conductive heat generating material (2) that enables such a construction method has also been simultaneously developed.

Conductive heating material (2) as used in the present invention refers to 1. Fibers that generate heat when energized, such as carbon fibers and metal fibers that generate heat when energized, and filaments and fabrics processed from these materials (including nonwoven fabrics).
In addition, there are conductive metal foils such as iron and stainless steel, and metals and metal flakes that generate heat due to eddy currents in a magnetic field.

In this case, the crosslinkable resin referred to in the present invention is not particularly limited, but may include the above-mentioned thermosetting resin and IR.

I Includes rubber adhesives such as IR, BR, CR, SBR, NBR, and EPR. It also includes those that exhibit adhesive properties by crosslinking when heated, such as urethane and silicone resins.

In addition to these, vulcanizing agents (crosslinking agents), vulcanization accelerators (crosslinking accelerators), fillers such as calcium carbonate, magnesium carbonate, and carbon, and if necessary, calcium oxide as a dehydrating agent to suppress foaming. It is also possible to optionally use compounding agents such as oil and plasticizers.

A conductive heat generating material (2) is added to such a crosslinkable resin composition (1).
) means to integrate or add these electrically conductive heat generating materials (2) in a liquid crosslinkable resin composition in the case of electrically conductive heat generating fibers such as carbon fibers and metal fibers, their filaments and cloth. Soaking (
dipping) or roll coating to make it impregnated. Furthermore, when the crosslinkable resin composition has a viscosity higher than that of a paste or is in the form of a film, it may be coated, tightly integrated, laminated, or the like.

When the conductive heat generating material (2) is a conductive metal foil such as iron or stainless steel, integration with the unvulcanized rubber material composition (1) means close integration, lamination, etc. of these materials. One way of integrating these materials is to bond these materials together by energizing the conductive heating material (2) or applying magnetic field energy to generate heat to an extent that vulcanization does not occur.

Even when the conductive heating material is a metal such as iron or stainless steel that generates heat by generating eddy currents in a magnetic field, it is possible to integrate it using the same method as before or attach it using a film.

Electrifying the conductive heat generating material (2) and thereby generating heat means that the temperature of the conductive heat generating material (2) rises above room temperature depending on the current density. It also uses the heat generated by electric current.

In this way, the conductive heat generating material (2) is added to the crosslinkable resin composition (1).
) is integrated with or added to a vulcanized rubber material or added to other members that need to be integrated with a crosslinkable resin.

Components that are integrated with vulcanized rubber materials 1. For example, weather strips in automobiles are integrated into window frame members, and other applications include vulcanized rubber and synthetic resins with rubber elasticity that are integrated with metal, wood components, and plastics. , bonding and integrating with ceramics, etc.

The members to be integrated with the crosslinkable resin are the same members that are bonded together using a vulcanization-adhesive adhesive. This also includes butting and gluing the ends of the rubber belt together when manufacturing the endless rubber belt.

Applying the crosslinkable resin composition to these components means applying the crosslinkable resin composition (1 ) and the conductive heating material (2) are brought into close contact or filled.

After the crosslinkable resin composition (1) is heated, when the heating is stopped by stopping the electricity supply or magnetic field energy, depending on the crosslinkable resin composition of 1M material, it may be immediately adhered irremovably or may adhere over time. A suitable adhesive state is achieved after several minutes have passed. In the latter case, in addition to the crosslinkable resin composition, it is also possible to use an early curing adhesive such as a hot melt adhesive.

Namely.

When the component that requires adhesion is a wood decorative board and this is to be adhered to a wood base material, the unvulcanized rubber material composition used is a slow curing composition such as NR or IR. The adhesive is left for about a day or night to wait for the adhesion to be completed, but as an early temporary measure, the hot melt adhesive and conductive heat generating material are integrated near the integrated crosslinkable resin composition of the present invention and the conductive heat generating material. It is used for adhesion.

When the unvulcanized rubber material composition of the present invention and the conductive heat generating material are integrated, the amount of current applied depends on the material, thickness, and size of the conductive heat generating material, and the amount of electricity applied to the unvulcanized rubber material composition. It is adjusted depending on the amount, vulcanization temperature, etc.

In the case of heating using a magnetic field, the type, thickness, and
It is adjusted depending on the distance up to that point, the type and amount of the shield (intermediate inclusion), its Jfj thickness, etc.

"Action" The crosslinkable resin composition (1) of the present invention is added to the conductive heat generating material (2).
When an electric current or magnetic field energy is applied to the crosslinkable resin composite (10), the conductive heat generating material (2) generates heat, and the heat causes the crosslinkable resin composition (1) to be heated. As the sulfur progresses, this crosslinkable resin composite (1
0) A member integrated with or attached to it is adhered, or vulcanized rubber is molded. At that time, the conductive heat generating material (2) not only provides the crosslinkable resin (1) with the thermal energy necessary for crosslinking and vulcanization, but also applies heat to the nearby members that need to be bonded to bond them. It has the effect of enabling the necessary wetting.

This crosslinking (vulcanization) adhesion and molding can be performed even within invisible members. In other words, it is possible to bond wood boards and wallpaper by applying thermal energy from the outside while adjusting the temperature appropriately, so it can be used for adhesion and temporary fixing of interior materials and ceiling materials in residential construction, decorative boards, free access floors, etc. It is also possible to form a vibration isolator on the underside of a carpet, on the underside of a building support, or between structural members.

The present invention will be explained in detail below with reference to Examples.

``Example 1'' Figures 1 (a) and (b) show a wooden frame (5) attached to a wooden brick base material (4) attached to a concrete base (3) and a wooden plywood interior material (6 ) are a perspective view and a cross-sectional view showing how they are simultaneously bonded according to the present invention.

A crosslinkable resin composite (10) is interposed between the wood brick base material (4) and the wooden rim (5) and between the wooden rim (5) and the interior material (6). . The crosslinkable resin composite (10) used here uses a thermosetting resin (epoxy resin adhesive, trade name: Konishifikset) as the crosslinkable resin, and this is used as a conductive heat generating material (2). Iron foil (27μ
It is coated on both sides of Toyo Steel Sheet W14).

This iron foil is provided with a 4 mφ through hole (7) to allow the thermosetting resin to coalesce on both the front and back surfaces, thereby increasing adhesive strength. Figure 2 shows the crosslinkable resin composite (10
) is shown in a perspective view.

Next, the adhesive device of the present invention was applied to the interior material (6) from the indoor side. This device applies magnetic field energy to the conductive heating material (2) to generate an eddy current.
) and a power feeding section (
12) A high frequency current of 3000 Hz is passed through the coil of the coil part (11) of this adhesive device to generate heat in the conductive heating material (2), and the crosslinkable resin is heated by the heat, @ Gluing was done while changing the location.

The circuit diagram is shown in Fig. 13, and the power supply part (12
) is a coil part (11) that generates an eddy current in the conductive heating material.
); a detection unit (14) for detecting the output current etc. sent to the coil;
4), and the result obtained by the calculation control section (15) is sent to the output adjustment section (13) to control the amount of power supplied. Detection part (engineering part 4)
) is a rectifier circuit (16) for the detection current obtained by the detection circuit.
and an A-D converter (17).
) consists of a microcomputer. Output adjustment section (13
) consists of an ignition circuit that receives commands from an arithmetic control section (15) and a thyristor that is controlled by the ignition circuit.

The calculation section consisting of a microcomputer is shown in the flow sheet of Fig. 14, but it can also be controlled in various ways for safety, and if there is no metal sheet body that generates eddy currents due to magnetic flux, the coil section (11) Stop energizing. If crosslinking of the crosslinkable resin progresses and there is a change in the endothermic state, or if more heating than necessary occurs, the power supply to the coil is suppressed. Thickness 27p @ 203.
When iron foil with a length of 40 as was used as the conductive heat generating material, when 10 V and 30 A of power was supplied to the coil (11), the purpose of adhesion could be achieved in 2 minutes under the conditions of this example.

In this eddy current heating type bonding device, the calculation unit (15) is composed of a computer, but the metal detection signal generation circuit (a multivibrator using an operational amplifier, resistor, and capacitor) is used to determine whether the conductive heating material (2) is appropriate or not. ), a heating display circuit that lights up an indicator lamp when the conductive heat generating material (2) is in a heated state, and a heating display circuit that detects the back electromotive force and outputs a signal every few seconds). According to the present invention, the structure may include a start-up delay circuit for adjusting the heat generation temperature to a proper range, and a detection circuit for detecting input power and detecting a signal for correcting the set value of the output setting circuit. Able to achieve purpose.

By attaching only the coil portion (11) or the entire device to a computer-controllable manipulator or traveling device, this mounting box can automate the bonding process at various construction sites and manufacturing plants.

According to this adhesive device, not only the above example but also a floor finishing material (20) such as a carpet can be attached to a floor surface (21) as shown in FIG.
It can be used in a wide range of applications, such as gluing wallpaper, ceiling materials, etc., and gluing outdoor objects. The composite adhesive to be used is not limited to this example, but may also be made of a conductive heat-generating material and a heat-adhesive adhesive such as a hot-melt adhesive.

This device is capable of applying magnetic field energy while stopping at the part that requires adhesion, or of applying magnetic field energy while gradually moving the part.

Returning to Figure 1, in this example, the wood bricks, rim, and interior material are bonded together at the same time. If the magnetic field energy is large, it is possible to bond the underlying concrete wall surface and wooden bricks in the same way.

When the heat capacity of the member to be bonded is large, it is necessary that the bonding surface of the member be wetted by the adhesive layer. Therefore, a correspondingly large amount of magnetic field energy is required. If the relative magnetic permeability or specific resistance of one or both of the mating members is such that heat generation due to ohmic loss occurs due to eddy current generation, the conductive heating material (2) is not necessary.

"Example 2" 100 parts of rIR (parts by weight, same hereinafter), 90 parts of calcium carbonate, and 6 parts of process oil were placed in a Banbury mixer (capacity 211) and kneaded for 7 minutes. In the resulting mixer,
5 parts of zinc white, 8 parts of CaO, 10 parts of epoxy-modified butadiene rubber to improve adhesion to metal, and 4 parts of triallyl trimellitate were added and kneaded with a roll. This was made into a sheet with a thickness of 1 cm and a length of 113 am and a length of 5
A cross-linkable resin composition (1) was obtained by cutting the aluminum into strips of stainless steel foil (30 μ thick) with a width of 3 cm and a conductive heat generating material (2) in the form of a strip with 4 mm diameter through-holes provided at 10 mm intervals.
A cross-linked resin composite (lO) was obtained by pasting it on both the front and back sides of the sheet, leaving a gap of 2 inlets.The interval of 2+m is an easy-to-cut part (22), and a perforation was made in this part. It is convenient because you can easily cut it if you leave it on.

As shown in Figure 12, this cross-linked resin composite (lO) is placed on a steel plate free access floor (23), and the back surface of the object is covered with a rubberized loop brushed acrylic. A carpet (24) was laid.

From above, vulcanization and simultaneous bonding was gradually performed while applying magnetic field energy using a device having a structure in which the coil portion (11) of the bonding device described above in the practical section was equipped with a roller (45) suitable for sweeping. Results of sweeping a 3000 Hz current to the coil section (11) with an output of 500 W.

The carpet was irremovably glued.

Examples 3 to 5 Using the crosslinkable resin composition (1) described in Example 2, a crosslinkable resin composite (10 )It was created.

In the example shown in FIG. 4, stainless steel fibers (thickness 10μ, 5US304, trade name: Susmic Fiber, manufactured by Tokyo I14) are arranged to have a width of 2.5 m as the conductive heating material (2). When electricity is applied from both ends, this becomes a heating element 6 and the energy necessary for cross-linking can be obtained from this. Therefore, in the example shown in Figure 5, a horseshoe-shaped aluminum foil (15μ) is used as a conductive heating element (2). This is what I did.

FIG. 6 shows an example of a structure in which the conductive heating material (2) is folded back on one side, and the current-carrying terminals at both ends are connected.

These are of the type that generate heat when energized, and appropriate crosslinking and vulcanization can be achieved by controlling the amount of ffi passed to the extent that scattering occurs due to thermal vibration of the lattice.

Example 6 The current-carrying type is a conductive heating material (2
) is exposed and serves as a power receiving terminal (26),
FIG. 9 shows an example in which electricity can be applied even if the power receiving terminal is not exposed. This is a clamp type power supply terminal (27
) sandwiching the crosslinkable resin composite (10) of the present invention and a plate-shaped interposed terminal (28) provided with a large number of protrusions as shown in FIG. Current can be passed through the protrusion of the intervening terminal (28) penetrating through it to the conductive heating material (2) in contact with it.

Example 7 As shown in FIG. 10, both ends of a molded rubber strip (30) that can be formed into a weather strip are brought together, and a crosslinkable resin composite (10) of electrically conductive adhesive type is applied to the abutted portion.
It was arranged so that it sandwiched the . This crosslinkable resin composite (10
) is obtained by applying a chlorinated rubber overcoat adhesive (trade name: Chemlock 205) to both sides of aluminum foil (15μ) and drying it.

This cross-linked resin composite (10) with an area of 1 d is covered with an electrifying bag @ (Power 5upiiy) from both sides as shown in the figure.
By passing 0.5V and 5A, the adhesion was completed in 2 minutes.

The power receiving terminals (26) (26) protruding from both sides of the product were broken and removed to make the product. The process has been greatly simplified compared to the conventional method of injecting unvulcanized rubber into a mold while holding both ends of the rubber strip and heating it to a high temperature.

Example 8 Figure 11 shows a rubber elastic body (
30) shows how the support member (31) is fixed. The crosslinkable resin composite (10) used here is formed by forming a conductive heat generating material (2) made of carbon fiber (string-like heat generating element, electric specific resistance 10-1 to 10-0 ΩG) into a circular shape, and forming the conductive heat generating material (2) made of carbon fiber into a circular shape, and forming the conductive heat generating material (2) made of carbon fiber into a circular shape. Power receiving terminals (26) (26) are made to protrude. This conductive heat generating material (2) is coated and impregnated with an epoxy resin adhesive (Bond E30 Konishi Wry).

In this state, apply 12V to the carbon fiber conductive heating material (2), and
．． 5A was passed through the power supply terminals on both sides for 10 minutes and then left. Note that the temperature during energization is approximately 80°C. As a result,
It was firmly bonded with the support member (31) at the bottom.

Example 9 In the case shown in Fig. 7, one of the members to be bonded is a steel member (1
8), and the other is a wooden member (19). The conductive heating material (2) is aluminum foil with a thickness of 15μ. In the case of such adhesion, in the present invention, adhesives suitable for both TF4 and wood can be used.

That is, as seen in this example.

Between the N4 member (18) and the conductive heat generating material (2), a thermosetting resin epoxy adhesive (
Made by Dow Chemical Company, product name DER66], with addition of curing agent dicyanamide), is used as a conductive heat generating material (2)
A hot melt resin adhesive (3) is placed between the and the wooden member (19).
2) Nylon-12 (Diamid 2401 Daicel Chemical Industries-II) is used.

In the case of the above structure, the size of the conductive heat generating material (2) and the adhesive is 2.7 Qm in width and 240 m in length, and there are 16 through holes of 4 mφ each in 3 holes for the aluminum foil conductive heat generating material (2). There are queues. The crosslinkable resin composite under these conditions (
When a voltage of 0.6 V and 12 A was applied to 10), each adhesive melted in about 10 seconds and became bondable.

When the electricity was turned on for about 5 minutes until the adhesive was well wetted to the lower tonal component, and then the electricity was turned off, the hot melt adhesive on the upper part solidified and bonded after about 30 seconds, and the epoxy resin on the lower part was good after 3 hours. It became a state of adhesion.

With the completion of the present invention as described above, it has become possible to easily supply the thermal energy necessary for crosslinking and vulcanization at construction locations and internal installations, which were previously difficult. Interior and exterior materials for housing and building construction, road construction, retrofitting of materials to structures, pasting of maintenance materials,
This greatly facilitates the bonding process used in manufacturing products in factories, and also enables unmanned construction and assembly using computer-controlled machines.

From an equipment perspective, conventionally vulcanization pots, hot press equipment,
Since thermal energy had to be applied to the bonding surface from the outside of the bonding object such as a heating type or other object by mainly using thermal conduction, the device had to be enlarged. Since thermal energy is provided by heating the device itself or its vicinity, the device can be made smaller and power consumption is more efficient. Furthermore, it was possible to shorten the bonding time.

[Brief explanation of the drawing]

FIG. 1(a) and FIG. 1(b) are a perspective view and a sectional view showing the construction state. 2 to 6 are partially cutaway perspective views of the conductive heat generating material. FIG. 7 is a longitudinal sectional view showing the construction state. FIG. 8 is a perspective view of the interposed terminal, and FIG. 9 is a perspective view showing its usage state. FIG. 10, FIG. 11, and FIG. 12 are perspective views showing the state of bonding work. 13th
The figure is a circuit diagram. FIG. 14 is a flow sheet. (1) Crosslinkable resin composition (2) Conductive heating material (7) Through hole (10) Crosslinkable resin composite (11) Coil part (12)
Power supply section (13) Output adjustment section (14) Detection section (15) Arithmetic control section (2G) Power receiving terminal
(27) Power supply terminal (28) Interposed terminal (32
)More than hot-melt resin adhesive

Claims (1)

[Scope of Claims] 1. A conductive heat generating material (2) is integrated or attached to a crosslinkable resin composition (1), and this is attached to a member that needs to be integrated with a crosslinkable resin adhesive, and the conductive An adhesive construction method characterized by applying electricity to the heat generating material (2) or generating an eddy current by a magnetic field, and using the heat generated thereby to promote crosslinking of the crosslinkable resin and bonding. 2. A crosslinkable resin composite comprising a crosslinkable resin composition (1) and a conductive heat generating material (2). 3. The crosslinkable resin composite according to claim 2, wherein the conductive heat generating material (2) is made of an electrically conductive heat generating fiber such as carbon fiber or metal fiber, a filament thereof, or a cloth thereof. 4. The crosslinkable resin composite according to claim 2, wherein the conductive heating material (2) is a conductive metal foil such as iron or stainless steel. 5 Coil portion (
11) and a power supply unit (
12) An adhesion device consisting of. 6 The power supply unit (12) includes a high-frequency current oscillation unit, a high-frequency current output adjustment unit (13), and an output current value detection unit (14).
) and an arithmetic control section (15) for the detection value obtained by the detection section. 7. The power supply unit includes a high-frequency current oscillation unit, a high-frequency current output adjustment unit, and a unit for detecting input power and correcting the setting value of the output setting circuit in order to keep the heating power of the conductive heating material (2) constant. 6. The bonding device according to claim 5, comprising a detection circuit for detecting a signal.