JPS58155946A - Method and device for manufacturing vibration inhibiting steel plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a method for producing a vibration-damping steel plate, specifically a plywood material having a vibration-absorbing property made by sandwiching a viscoelastic material between two steel plates and forming a sandwich structure. l1lI
It is related to t.

The distributed steel plate is made by laminating two O thin steel plates with a thickness of 1 or less with a thin layer of viscoelastic material such as plastic (Q, 1 to Q, 6 thick root f) in between, to absorb the vibration energy applied to it. Due to the shearing deformation of the elastic material layer, the energy is rapidly reduced and converted into thermal energy, thereby effectively damping vibrations. For this reason, vibration-damping steel plates are mainly used for vibration prevention and noise prevention.For example, vibration-damping steel plates are used to improve livability by making vibration control steel plates in the floors and ceilings of ship cabins, and in automobile passenger compartments. 1 each
General building materials such as (iI1 products were made from IIIJIII plates to reduce noise from automobiles) and general building materials such as partitions for livestock (partitions for livestock) were made from vibration damping steel plates, and were used for a variety of purposes. It's coming. Various configurations of vibration damping steel plates have been proposed, such as steel plates, which have been put into practical use and are commercially available. Although it is expected that the price will be lower due to the ease of making bags, it has remained difficult to commercialize to date because of problems such as not very high vibration performance and easy peeling. ing. According to the studies conducted by the present inventors, the cause of this problem is the air bubbles remaining at the boundary between the film and the steel plate. ) increases, the vibration damping performance also decreases and peeling becomes more likely. In the conventional manufacturing method of damping steel plates by sandwiching films, a film is layered on a lower steel plate, and then an upper steel plate is layered on top of that to form a laminate, which is then heated using a hot press. Both sides are heat-pressed and cooled. Therefore, the air that entered between the film and the steel plate during the formation of the laminate becomes a droplet melt when heated by the hot press and is trapped in the surface layer of the film.
The air bubbles remain at the boundary between the film and the steel plate and are cooled, resulting in the air bubbles remaining in the resulting prosthetic product as described above. The presence of these air bubbles makes the W* performance of the distributed steel sheet lower than the vibration damping performance of the film itself (the efficiency of converting vibration energy into thermal energy), and also reduces the adhesion between the film and the steel sheet, causing peeling. Moreover, during the bending process, a rice-grain-like recess is formed on the surface of the small self-contained part due to the depression of the part corresponding to the internal air bubbles, which causes the appearance of the molded product to be marked.

This invention was made based on the knowledge of Mr. Shoji, and is a continuous manufacturing method and manufacturing apparatus that hardly causes the above-mentioned residual air bubbles in the manufacturing of vibration damping steel plates having a structure in which a film is sandwiched between a film and a film. is intended to provide.

That is, in the method for manufacturing a vibration damping steel plate of the present invention, a self-adhesive thermoplastic resin film and a newly assembled hot melt type plastic film are generally placed between the WJl and the second two steel plates at room temperature. The film has a Young's modulus of 10' to 10 dyn/a.
The laminated body within this temperature range is preheated to a temperature range of i, and the laminated body within this temperature range is transferred from the outer surface of both steel plates while being pressed by a roll, and is brought into contact with the inner film and the inner surface of the steel plate using a rolling method. The air bubbles are pushed out, the film is rapidly heated, and the film is immediately thermocompressed using a hot roll at a temperature above its melting point, and then cooled in a cooling zone while being restrained.

In the apparatus for manufacturing a distributed steel sheet of the present invention used in this manufacturing method, the laminate is manufactured such that the Young's modulus of the film is 107 to 10.
A preheating device that preheats the temperature within the temperature range of dyn/j, and a laminate installed on the outlet side of this preheating device that heats the laminate to the above temperature range @ J circle from the outer surfaces of both steel plates and transfers them to form air bubbles. a press roll, preferably made of elastic material, for punching;
Immediately after this pressure contact roll, a combination of a hot roll and a rapid heating device is provided for thermocompression bonding the laminate described in 1 under conditions where the film is at a temperature equal to or higher than its melting point.

In this way, the laminate in which the film is sandwiched between two steel plates is preheated to a temperature at which the film is easily deformed, and air bubbles are removed by transferring the film to a roll while pressing it. According to the present invention, the film and the steel plate become in close contact with each other when the bubbles are removed, and the hot roll immediately presses the film and the steel plate in the area where both steel plates are fully adhered to the film. Therefore, no air bubbles are introduced, and the obtained product vibration damping steel plate is of high quality and free of air bubbles. In addition, since the manufacturing process of this invention forms a continuous flow, it can be applied to both cut plates and coiled materials. This increases the trust factor.

In this invention, heating in the preheating device is performed within a temperature range such that the Young's modulus of the film is 109 to 10@5iyn, -.
(lh 50 IK/- or less), if the Young's modulus of the film exceeds # 10 d)' nz-, the film becomes rigid, and it becomes less compatible with the surface shape of the steel plate, causing a gap between the film and the steel plate. Gaps are likely to form, and air is trapped during pressure transfer using pressure rolls! This is because it causes clogging and bubble magnetization, and if the Young's modulus of the film is less than 10', the film becomes sticky and air bubbles are trapped and difficult to release. In this case, since the thickness of the film is usually about 0.1 to α6■ for this type of damping steel plate, it hardly affects the preheating temperature range.

In the present invention, the self-adhesive thermal/circular resin film is made of, for example, polypropylene-based, polyether/co-based, ethylene acrylic acid cobolima, or those obtained by adding various components to these, and the desired temperature range is used. The component W4!1 is set so as to exhibit the allocation performance of . However, in the present invention, since the bubble ratio can be reduced to almost zero, it is possible to manufacture a side edge steel plate that effectively utilizes the vibration damping performance of the film itself without impairing it.

In addition, in this invention, the time interval from the time of removing air bubbles with the pressure rolls to the time of thermocompression bonding with the hot rolls should be as short as possible. ) Due to deformation, a barrier may be formed between the film and the steel plate in the peripheral area. Therefore, the steel plate is brought into close contact with the film due to the pressure welding by the pressure roll, and the O-interval adhesion force exceeds the stress at the mating surfaces in a vacuum state. During this process, it is best to heat and press the bottle by placing it on a hot roll before the bottle undergoes deformation. In this case, heating with a hot roll only makes linear contact with the steel plate, which may not be sufficient depending on product specifications such as plate thickness. combined. This rapid heating device heats the laminate that has been preheated by the preheating device described above within a short time as described above, and therefore, depending on the line speed, in a short gap size between the pressure roll and the hot roll.
By heating the film to a temperature above its melting point1
For example, an induction heating device or a near-infrared heating device is used.

Thermocompression bonding using hot rolls is carried out in a state in which the film is heated above its melting point, and is then cooled while being transferred under restraint using pinch rolls or the like.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing the line arrangement of a distributed steel sheet manufacturing apparatus according to an embodiment of the present invention, in which the steel sheet that has been pretreated by degreasing is placed in the first steel sheet (lower steel sheet in the figure). 1)
This is shown as a second steel plate (2) which is the upper steel plate.

The first steel plate (1) is placed on the idle roller table (3).
The sheets are placed one by one and fed into the film runner (4), and the first fI! 4
A self-adhesive thermoplastic resin film (5) is spread uniformly over the entire width of the top surface of the board, and once the entire width of the copper board has been covered, the film is cut. In this case, for example, the film (5) is first charged by charging the film.
It is best to make it lightly adhere to the steel plate (1). j
The I2 steel plate (2) is placed on top of the steel plate (1) covered with this film (5), and in this way the film (S) is placed between the two steel plates (1) and (2). A sandwiched laminate (6) is prepared. This stack (6) is conveyed downstream of the line by pinch rollers (7) and is first fed into a preheating device (8) such as an infrared heater. In this preheating device (8), the 119 laminate (6) is fed into the preheating device (8) until the Young's modulus of the film (5) is 10q to 1.
Heat to a temperature range of 0.dyn/d. The thus preheated laminate (6) is transferred while being pressed from both upper and lower sides while within the temperature range by a pressure roller (9) made of a rubber roll provided at the beginning of the preheating device 01). Air bubbles will be removed by air/1
The extracted laminate (6) is in close contact with the whole blood, and immediately after leaving the pressure roll (9), it is bitten into Hontrol α mackerel via the rapid heating device (2). This pressure roll (
9) The time from leaving the hot roll (iLIK) to being bitten by the hot roll (iLIK) depends on the thickness of the steel plate, but is for example a few seconds to several seconds.The rapid heating device (transfer) is, for example, an induction heating device using an induction coil. Then, the laminate is heated by this rapid heating device and a hot roll so that the film reaches a temperature higher than its melting point, and then the laminate is pressed by the hot roll and bonded by thermocompression.The hot roll (b) is a heater. The built-in pinch rolls can be used, and the thermocompressed laminate that exits the hot a-le CIJ immediately enters the cooling zone (6), where it is cooled while being restrained from above and below by the pinch rolls uK there. , after necessary post-processing, it becomes a damping steel plate a4.

In this invention, the film (5) as a viscoelastic substance is one whose composition has been adjusted in various ways to obtain the desired distribution performance depending on the temperature range in which the distribution steel plate is used. Naturally, the temperature characteristics of the Young's modulus of the steel sheet change, so when setting the temperature in the preheating device 1 (8), the type of film should be taken into consideration as well as the dimensions and material of the steel plate used and the film thickness.

In other words, the temperature characteristics of Young's modulus in a polypropylene film whose composition has been adjusted to a melting point of 140°C for high-temperature applications are as shown in Figure 2'. It can be seen that it is necessary to heat with the preheating device (8). Similar characteristics of a three-component film whose main component is ethylene acrylic acid copolymer (Nmumu) whose melting point is adjusted to 100°C for use in the normal temperature range of 20°C to 60°C are shown in Figure 6. As shown in h), it can be seen that it is necessary to preheat the film so that the film temperature becomes 20° C. or higher in the case of a grain film.

In addition, the melting point is 1 for use in the medium temperature range of 60℃ to 90℃.
The temperature characteristics of the Young's modulus of the 9E5M film whose components were adjusted to 05°C are shown in Figure 4 (To), and this 4
It can be seen that it is necessary to preheat the film to a temperature of 55° C. or higher.

This is one of the episodes! In the first example, the first and second
As a steel plate, the thickness is A4, the width is 1250, and the length is 2500.
■Polypropylene resin film using O material and having the characteristics shown in No. 211 as a film [thickness α15■]
I tried manufacturing a split steel plate using this. In the case of film, the film temperature is set within the range of 95 to 100°C in the preheating device, and within this temperature range, air bubbles are removed using a rubber pressure roll, and the film is placed at the position of pressure roll O1F#11.8m. During this time, the film is heated rapidly to further raise the film temperature by 50°C using a 1m long field heating coil, and then auxiliary heating is performed using the hot roll to finally heat the film to above the melting point temperature. It was crimped. The induction heating coil used here has an output of 100 KW and has a power of 20
It was confirmed that rapid heating of about 'C/sse could be performed, and the line speed could be set at 20 m - 8 Kt. The attached reference photo 1 shows the surface of the film after forcibly peeling off the submerge cut from the damping steel plate obtained at this time, and it can be seen that there are almost no air bubbles at all. For comparison, reference photo 2 shows the peeled surface of a sample obtained in the same manner without removing air bubbles with a rubber pressure roll, clearly showing that there are many air bubbles on the film. There is.

As described above, according to the present invention, in the production of damping steel plates having a film sandwich structure, air bubbles are not generated at the boundary between the film and the steel plate, and the production can be carried out in a continuous flow. Therefore, high-quality film sandwich type l1111i steel sheets can be manufactured with high efficiency, which greatly contributes to lowering the price.

[Brief explanation of drawings]

JllWA is a schematic diagram showing the line arrangement of a w4 shaken steel plate manufacturing apparatus according to an example of the present invention, Fig. 2, Fig. 311,
Figure 4 shows the Young's modulus of films with different temperatures [
FIG. (1): No. 19 steel plate, S): JIE2 steel plate, (4): Film runner, 俤): Film, (6): Laminated body,
(7): Vinci roll, (Ji): Preheating device, (9)
: Pressure roll, 2): Rapid heating device, (B): Hot roll, (2); Cooling zone, (B): Vinci roll, c
L4: Damping steel plate. Representative Patent Attorney Masatoshi Sato

Claims (1)

[Claims] (1) A self-adhesive thermoplastic resin film is sandwiched between a first steel plate and a second steel plate, and the films are heated to a temperature such that the Young's modulus of the film becomes 10' to 10·d'll/-. After preheating, the steel plates are transferred from the outer surfaces of the steel plates at this temperature while being brought into pressure contact with a roll to remove air bubbles, and are then heated rapidly and immediately transferred to a hot roll at a temperature higher than the melting point of the film. (2) A method for manufacturing a split steel plate characterized by cooling the edges thereof. A preheating device for preheating to a temperature such that the Young's modulus of the steel plate becomes 10″ to io@dyV− is provided on the outlet side of the preheating device, and the laminate heated to the above temperature is brought into pressure contact with the outer surfaces of both steel plates while being transferred. Production of a divided steel sheet, characterized in that it is equipped with a pressure roll for removing air bubbles, and a combination of a hot roll and a rapid heating device for thermocompression-bonding the laminated film at a temperature higher than the melting point of the film immediately after the pressure roll. Device.