JPS6359864B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves rolling up a laminated material such as impregnated paper or impregnated cloth, which has been pre-impregnated with a thermosetting resin such as a phenolic resin, onto a core metal while heating and pressurizing it, and after cooling, the core metal is removed. The present invention relates to an apparatus and method for producing rolled laminated pipes which are drawn to obtain hollow pipes.

2. Description of the Related Art Conventionally, there is an apparatus for manufacturing rolled laminated tubes having a configuration shown in FIG.

This is two heating rolls 10 arranged in parallel.
A core metal 101 is arranged between 2 and 103, and the core metal 10
Wrap the end of the laminated material F around 1 and press the pressure roll 1.
04, and then the heating rolls 102, 10
3, the laminated material F is rolled up to a predetermined thickness while being heated.

The rolled laminated tube manufactured by this method has a preheating device 106 and heaters 105, 106.
Heating roll 102,1 heated by ......
The thermosetting resin such as phenolic resin impregnated into the laminated material is melted by the heating action of 03, and further infiltrated into each other by the pressing force of the pressure roll 104, so that the laminated material is integral with no separation. is obtained.

Therefore, rolled laminated tubes manufactured in this way are extremely strong, have excellent electrical insulation properties, and are excellent in workability, so they can be used for mechanical parts such as bushings, rings, cylinders, construction materials, and electrical materials. There is a huge demand for this field.

However, as mentioned above, rolled laminated tubes use impregnated paper or impregnated cloth made by impregnating the laminated material with a thermosetting resin, making it difficult to handle, and for this reason, existing equipment is completely ineffective as shown in Figure 1. It has a basic structure, and can be operated by multiple workers using a switch handle.
Everything is done based on intuition.

Therefore, productivity is poor and costs are increased, and the end portion of the core metal that is wound around the core becomes wavy due to heat shrinkage, resulting in inferior products with wrinkles forming on the surface of the finished product, and the yield is reduced. There are many problems that need to be resolved, such as poor performance.

The present invention was proposed in order to solve such conventional drawbacks, and it automatically supplies a predetermined amount of laminated material, wraps it uniformly around the core metal, and makes it easy to remove the laminated material after molding. The present invention provides an apparatus and method for manufacturing rolled laminated tubes that automatically performs major operations and also enables production of rolled laminated tubes of small diameter.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 is a perspective view showing the entire rolled laminated pipe manufacturing apparatus of the present invention, and in the same figure, 1
The main body is made of a structure mainly made of steel plates, etc., and has side plates 2, 3 reinforced with a plurality of reinforcing members 5, 5, and a top plate 4 arranged thereon.

B is a molding device which is used for forming side plates 2 and 3 of the main body 1;
A bearing member 8,
Roll 1 rotatably supported by 9, 10, 11
2 and 13 are arranged.

Since the roll 12 is used as a cooling roll in the present invention, a pipe 14 is connected to the end of the roll 12.
Cooling water is supplied and drained through a and 14b.

On the other hand, the roll 13 is a heating roll configured to electrically generate heat by induction inside, and a brush roller 15 for power feeding is provided at the end of the roll.
a, 15b and a brush roller 15 for temperature detection
c and 15d are provided, and an electric device supplies electricity to the internal heating element of the heating roll 13 from the power supply brush rollers 15a and 15b, and the heating roll 13 is activated by signals obtained from the detection brush rollers 15c and 15d. The temperature can be controlled to a predetermined value.

Next, 16 is a pressure roll, and the pressure roll 16 is a support member 19, 2 fixed to a movable plate 17.
0, and cooling water is supplied and drained through pipes 21a and 21b to cool the entire roll.

The movable plate 17 is connected to air cylinders 23 and 2 installed on a support plate 22 attached to the top plate 4.
The movable plate 17 is moved up and down by rods 24 and 26 of No.
0 allows it to move up and down at a precise position.

A dog 31 is fixed to the movable plate 17, and the dog 31 activates a position detector 32, such as a limit switch or a photoelectric switch, provided on the side plate 2 of the main body 7, so that the movable plate 17 is wound up onto the core metal A. It is possible to detect when the laminated material F reaches a predetermined thickness.

Further, by varying the vertical position of the dog 31, the amount of rolling, that is, the thickness of the stack can be freely adjusted. Numerals 33 and 34 are lifting members for the core metal, which are fixed to the rods 37 and 38 of the air cylinders 35 and 36, and after a predetermined amount of the laminated material F is rolled up on the core metal A, the air cylinders 35, 36 to push up both ends of the core metal A by the lifting members 33 and 34, thereby making it easier for the operator to take out the rolled tube.

C is a cutting device for the laminated material F, and a rodless air cylinder 39 has a movable member 40 exposed thereon that reciprocates on the cylinder case, and a double-edged cutter 41 is fixed to this.

Then, the rodless air cylinder 39 is operated in one direction based on a signal obtained from the position detector 32, etc., and the laminated material F is cut by a predetermined amount of feed.

In the present invention, a structure in which a cutter is attached to a rodless air cylinder has been exemplified, but the effect remains the same even if a chain equipped with a cutter is moved back and forth using a motor or the like.

D is a transfer device for the laminated material F, and the feeding roller 42 is driven by a motor 44 by a gear mechanism 43.
The driving force is transmitted through the chain 45, and the motor is rotationally driven.

A plurality of pressing rollers 47, 47, . . . are rotatably disposed on a support shaft 46 fixed to the side plates 2, 3 of the main body 1.

Incidentally, above the support plate 48 disposed between the rodless air cylinder 39 and the heating roll 13, the rods 51 of the air cylinders 49, 50,
A plurality of pressure rollers 53, 53, which move up and down at 52...
. . . is disposed by the support shaft 54, and the end portion of the laminated material F cut by the action of the rodless air cylinder 39 suffers accidental thermal contraction or bending when wound around the core metal A. In order to prevent this, the support shaft 54 is lowered at a required point, and the
3, 53, . . . are disposed on the support plate 48, and a holding device E is arranged so as to abut the end portion of the laminated material F.

Next, as shown in the figure, the laminated material F is produced by rotating the wound original fabric between the innermost side plates 2 and 3 of the main body 1, and applying the winding force of the core metal A or the feeding roller 4.
It is rewound and supplied by the action of 2.

However, when it is rolled up onto the core metal A, if the original fabric is allowed to unwind freely, there is a risk that the laminated material F will loosen, so it is necessary to keep it under appropriate tension.

Therefore, a drum 56 is fixed to the support shaft 55 of the raw fabric, and a belt 57 suspended on the drum 56 is tightened by the action of an air cylinder 58, thereby pulling the laminated material F and applying the laminated material to the core bar A. A braking device G is provided to make the winding of F more precise.

Note that this braking action is applied only when winding into the core metal, and the laminated material F by the feeding roller 42 is
In the case of feeding, the air cylinder 58 is operated under electrical control so that the raw cloth can rotate freely.

Next, the core drive device in the apparatus of the present invention will be explained.

In FIG. 5, 78 represents a motor, and the driving force of the motor is transmitted through a chain 79 to a transmission 80.
is transmitted to the input shaft 81 of.

A spline universal joint 83 is attached to the output shaft 82 of the transmission 80,
The end of the core metal A can be inserted into the spline socket of the joint, and the core metal A can be rotationally driven.

The above is the main configuration of the present invention, and other important components for improving the functions of the present invention will be explained.

First, FIG. 7 shows the pressure roll 16 of the apparatus of the present invention.
is a pressing device H for bending the bracket 59 downward, by means of pins 60, 60 at both ends of the bracket 59,
Pressing rollers 61, 61 are rotatably supported, and a bolt 62 is fixed to the center of the bracket 59.

Then, insert the bolt 62 into the through hole 63 of the movable plate 17.
is inserted between the pressure roller 16 and the movable plate 17, and by screwing the nut 64, the bracket 59 is pushed down, thereby causing the pressure roller 16 to be slightly curved from the center.

Therefore, the pressing force of the pressure roller applied to the laminated material F rolled up onto the core bar A is applied from the center outward on the axis, and the slight wrinkles and flexures remaining in the laminated material F are removed. etc. are also removed, which has the effect of smoothing the surface of the rolled laminated pipe.

Next, FIG. 8 shows a core metal holding device I used when forming a small-diameter rolled laminated tube using the apparatus of the present invention. Since the minimum diameter of the laminated pipe is limited to the range in which each of the three rolls come into contact, we made it possible to use pressure rolls with other smaller diameters and to form rolled laminated pipes with even smaller diameters. This is what I did.

FIG. 9 is a longitudinal cross-sectional view showing the core metal holding device I of the present invention.
8 and 68, and a support plate 69 is supported by a pin 70 on the lower inclined portion 66.

When the support plate 69 is in the same position as the slope of the slope part 66, the through hole 71 of the support plate 69
The through holes 72, 72 of the bracket 65 match with each other, so that the holding pin 73 can be inserted therethrough, and the support plate 69 can be fixed integrally with the bracket 65.

Furthermore, one or more small rollers 74, 74 are mounted on the tip of the support plate 69 via pins 75.

In the above configuration, when the core metal holding device I is installed and used in the apparatus of the present invention, the bolts 76, 76... . . , and place the support plates 69, 69 on the same plane as the inclined portion 66, inserting the holding pin 73 and fixing the support plate 69 in a fixed position.

Then, as shown in FIG. 9, a small-diameter pressure roller 77 is placed on a small-diameter core metal A, and the pressure roller 77 is attached to the small rollers 74, 7 of the support plates 69, 69.
4 to apply a pressing force while holding it, to obtain the same effect as in normal use.

In addition, when the pressure roll 16 is used in a normal state, the support plate 69 can be stored in the recessed part 67, and the operation of the apparatus will not be hindered.

The device of the present invention is constructed as described above, and a series of operations when it is operated will be described below. Since it consists of , only the main parts will be explained.

First, when the laminated material F is drawn out to the feeding roller 42 and is ready for operation, when an electric signal is applied using a start button or the like, the motor 44 is driven, and its driving force is applied to the chain 45 and the gear mechanism 43. The feed roller 42 is rotationally driven by the transmission, and the laminated material F is transferred forward, and the amount of this transfer is electrically detected by the rotation speed of the feed roller 42, and is placed at a predetermined position on the cooling roll. to stop it.

Next, the preheated core metal A is placed between the heating roll 13 and the cooling roll 12, and the front end of the laminated material F is manually wrapped around the core metal A.

When the drive switch starts operating the device, the motor 78 is first driven, and the driving force of the motor 78 is transmitted to the transmission 8 through the chain 79.
The rotational force transmitted to the input shaft 81 of 0 and further reduced in speed causes the output shaft 82 to rotate the spline universal joint 83, and the core metal A starts rotating.

Prior to this, the air cylinders 23 and 25 operate, lowering the movable plate 17 and lowering the pressure roll 16.
is pressed against the core metal A, and the air cylinder 58 is further activated to tighten the belt 57, apply braking to the drum 56, and tension the laminated material F.

When the core metal A is rotated as described above in such a state, the laminated material F is rotated by each roll 12, 1
While being heated and pressurized by steps 3 and 16, the metal core A is wound and laminated. Note that in the operating state, the gear mechanism 43 is in a free state, and the feeding roller 42 and the pressing rollers 47, 47...
follows the transport of the laminated material F.

As the laminated material F is rolled up on the core metal A and its thickness increases as described above, the pressure roll 16 is pushed upward, and the movable plate 1
The dog 31 installed at 7 operates the position detector 32, and based on this, the rodless air cylinder 39 is driven, the cutter 41 is moved, and the laminated material F is quickly cut.

At the same time, the air cylinders 49 and 50 are operated to lower the pressure rollers 53 and 53, and move the end portion of the cut laminated material F onto the support plate 4.
Hold on 8.

When all the laminated material F has been rolled up onto the core metal A, the rotational drive of the core metal A is stopped after a certain period of time has elapsed due to the action of a timer, etc., and the air cylinders 23 and 25 are activated to rotate the pressure roll 16. The air cylinders 35 and 36 are activated,
The rolled laminated tube pushed up by the lifting members 33 and 34 can be taken out together with the core metal.

When the rolled laminated tube completed in this process is taken out, the lifting members 33 and 34 descend, and at the same time, the motor 44 is activated and the feeding roller 42
is rotated to transport the laminated material F to a predetermined position on the cooling roll 12 and stop it.

Thereafter, by repeating the steps described above, it is possible to continuously produce rolled laminated tubes.

The rolled laminated tube obtained in this way is usually made into a finished product by performing after-baking (curing) for a certain period of time in a furnace heated to a predetermined temperature before removing the core metal. be.

As explained in detail above, according to the apparatus of the present invention, a series of important operations such as supplying, cutting, and roll forming of laminated materials can be automatically performed, so that the number of workers can be significantly reduced. Furthermore, since it can be mass-produced continuously, the cost of the product can be kept low.Also, since the pressure roll is given a compensation function by the pressure device installed on the movable plate, it does not produce inferior products and improves the yield. Furthermore, by using the core holding device, rolled pipes with small diameters can also be manufactured, improving the versatility of the device.

As described above, the present invention makes it possible to manufacture rolled laminated pipes with uniform quality, which was conventionally manufactured by relying on the intuition of workers. It's absolutely huge.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional rolled laminated pipe manufacturing device, FIG. 2 is a perspective view showing the rolled laminated pipe manufacturing device of the present invention, and FIG. 3 is a perspective view showing the internal mechanism of the device of the present invention. 4 is a longitudinal sectional view of the device of the present invention, FIG. 5 is a front view of the device of the present invention, FIG. 6 is a plan view of the device of the present invention, and FIG.
FIG. 8 is a perspective view of the pressing device used in the pressure roll of the device of the present invention, FIG. 8 is a perspective view of the core metal holding device used in the device of the present invention, and FIG. 9 is a state in which the core metal holding device is attached to the device of the present invention. FIG.

Claims (1)

[Scope of Claims] 1. In an apparatus for forming a rolled laminated pipe by rolling a laminated material onto a core metal while heating and pressurizing the material, an air cylinder arranged on a movable plate is placed between rolls arranged in parallel. A molding device comprising pressure rolls arranged to move up and down, and driven based on signals obtained from a position detector operated by a dog provided on a movable plate of the molding device during the transfer process of the laminated material. a cutting device for supplying the rolled laminated material to the forming device, a transfer device consisting of a feed roller and a pressing roller for supplying the wrapped laminated material to the forming device; 1. An apparatus for producing a rolled laminated pipe, comprising: a braking device for applying braking to a drum; and a holding device for holding down a rear end of the laminated material cut by the cutting device. 2. A core metal is placed in a forming device comprising pressure rolls arranged on a movable plate and moved up and down by an air cylinder between rolls arranged in parallel, and the laminated material is applied to the core metal as described above. The laminated material is rolled up while being heated and pressurized by each roll, and at this time, the laminated material is tensioned by a braking device, and when the amount of laminated material rolled up on the core metal reaches a predetermined value, a the dog activates the position detector,
Based on the signal sent from the position detector, the cutting device is operated to cut the laminated material, and at the same time, the holding device is activated to hold down the rear end of the laminated material, so that all the laminated materials are automatically cut. A method for producing a rolled laminated pipe, characterized in that the rolled laminated pipe is rolled up onto a core metal.