JP3199706B2 - Manufacturing apparatus for continuously manufacturing ceramic cylinder and manufacturing method for continuously manufacturing ceramic cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus and a manufacturing method for manufacturing ceramic cylinders such as fiber cement cylinders and outer pipes of refractory double-layer pipes.

[0002]

2. Description of the Related Art Conventionally, there are two types of fiber cement cylinders, ordinary cylinders and crater cylinders, which are widely used in detached exhaust stacks and crater chimneys. In addition, fire-resistant double-layer pipes are combined with a non-combustible outer pipe and an inner pipe made of synthetic resin to provide a fire-resistant double-layer pipe that has the effect of preventing the spread of fire in apartment buildings. (See FIG. 8). This fire-resistant double-layer pipe is inferior in fire resistance, taking advantage of the properties that synthetic resin pipes such as PVC of the inner pipe are superior in chemical resistance, corrosion resistance, inner surface smoothness, workability, etc. as compared with metal pipes. The shortcomings are covered by an outer tube made of noncombustible material. By the way, the fiber cement cylinder and the outer pipe of the refractory double-layer pipe (both are collectively referred to as “ceramic cylinder”) have slightly different raw material blends depending on their use, but the production equipment and production method are exactly the same. is there.

FIG. 5 shows a papermaking machine which is an example of an apparatus for producing a ceramic cylindrical body. In this papermaking machine, the raw material liquid in the raw material liquid layer (referred to as vat 1) is filtered and made up, and the thin green sheet on the made papermaking felt 3 is directly wound around the core tube 13 and passed through the upper felt 7. The ceramic cylindrical body is manufactured while holding with a plurality of holding rolls 6. FIG. 6 shows another example of the papermaking machine, in which a plurality of bats 1 shown in FIG. 5 are provided to improve the papermaking efficiency.
3, a green sheet laminate having a predetermined thickness (hereinafter, referred to as a raw sheet) is obtained by winding around a making roll 18 having a large diameter. Although not shown, the raw plate is cut to a predetermined length, one surface of the cut end is killed by a taper, and then wound around a core tube 13, which is also pressed (not shown) by a compression roll via a felt. Manufactures ceramic cylinders.

FIG. 7 shows a paper making machine called a flow-on method. In this papermaking machine, papermaking felt 20
A bat (raw material liquid tank) 22 having roll feeders 21 and 21 is disposed on the upper surface, and the raw material liquid is made into a felt 20 by rotating the roll feeders 21 and 21 and adjusting the gap between the two.
To form a thin green sheet.
The core tube 13 is supplied by a supply arm 29 of a core tube supply device 28, and the core tube 13 is supplied through a papermaking felt 20 to a roll 2.
The thin green sheet on the papermaking felt 20 is wound around the core tube 13 so as to be sandwiched between the roll 4 and the roll 25 to produce a ceramic cylindrical body.

[0005]

However, the conventional manufacturing method described above has the following problems. First, in the apparatus and the manufacturing method shown in FIG. 5, it takes time to replace the core tube 13 and the efficiency of the operation is reduced. That is, when the papermaking green sheet is wound around the first core tube 13 and the production of the ceramic cylindrical body is completed, the papermaking felt 3 and the upper felt 7 are once stopped completely, the pressing of the holding rolls 6, 6 is released, and the core tube is raised. The ceramic cylindrical body wound up in step 13 is removed and used for curing in the next step. After the removal, a new core tube 13 is supplied, and the papermaking winding is started. It is impossible to stop the papermaking felt 3 and the upper felt 7, remove the wound ceramic cylindrical body, supply the core tube 13, and start the papermaking winding operation.

Next, with the apparatus and the manufacturing method shown in FIG. 6, it is easy to obtain a green sheet having a predetermined thickness. However, manufacturing a ceramic cylindrical body from this green sheet is performed in a separate step, for example, manually. Requires winding work, and the production efficiency is low. Further, the manufacturing apparatus and the manufacturing method shown in FIG. 7 improve the efficiency by improving the manufacturing methods of FIGS. 5 and 6 described above. However, the wound ceramic-made cylindrical body is removed, and the core tube 13 is supplied. It is necessary to stop the papermaking felt 20 until the papermaking winding is started. At the same time, it is necessary to stop the rotation of the roll feeders 21 and 21 to stop the supply of the raw material liquid, and as a result, the thickness of the thin green sheet on the papermaking felt 20 is not stable, and the ceramic system having a uniform thickness is required. It is difficult to obtain a cylindrical body. Furthermore, since the papermaking felt 20 was temporarily stopped, the efficiency was also reduced. Therefore, an object of the present invention is to provide a manufacturing apparatus and a manufacturing method that can replace a core tube without stopping a papermaking felt (a water-permeable belt) and continuously obtain a ceramic-type cylindrical body of stable quality. .

[0007]

According to the first aspect of the present invention, a green sheet is formed by uniformly supplying a raw material slurry onto a running endless permeable belt, and the green sheet is wound around a hollow core tube. In a paper machine for forming a ceramic cylindrical body, a sheet end cutter for cutting a green sheet into a predetermined length on a running endless permeable belt, and both ends of a core tube are clamped and supported, and the running endless permeable Core drum that sequentially supplies a core tube to a green sheet winding position in synchronization with the speed of a running endless water-permeable belt on a green sheet on a conductive belt, and a core tube that supplies a core tube to the core tube drum A supply device, and a core tube take-out device for taking out the core tube from which the green sheet has been wound up, from the core tube drum. When winding the green over sheet to the core tube supplied onto preparative, by performing the winding operation, a green sheet successively core pipe without stopping the endless permeable belt which runs, to achieve the above object.

According to the second aspect of the present invention, a substantially conical jig is disposed at the tip of the cylinder rod so as to be rotatable around the cylinder rod in order to clamp and support both ends of the core pipe. Further, a holding portion capable of supporting the clamp is provided irrespective of the inner diameter of the core tube, and the core tube clamped and held by the holding portion is rotatable only in the forward direction.

According to the third aspect of the present invention, the raw material slurry is uniformly supplied onto the running endless water-permeable belt by the manufacturing apparatus for continuously manufacturing the ceramic cylinder according to the first or second aspect. Cut a green sheet to a predetermined length with a sheet end cutter on the running endless permeable belt, and when the cut reaches a predetermined position, a core pipe feeding device The core tube drum, which clamps and supports both ends of the core tube supplied in step (1), rotates in synchronization with the speed of the running belt, and supplies the core tube to the winding position while pressing the core tube onto the green sheet. The above-mentioned object is achieved by continuously forming, taking out and curing a ceramic-based cylindrical body without stopping the running endless water-permeable belt. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. FIG.
It is a figure explaining the core pipe continuous supply by the flow-on papermaking machine concerning this embodiment. The apparatus includes a bat 50 as a raw material liquid layer, an endless water-permeable belt (felt) 52 for transporting the formed green sheet 80, a sheet end cutter 54 for cutting the green sheet 80, and a core pipe supply for sequentially supplying a core pipe. The apparatus is provided with a device 56, a product take-out device 58 for taking out a completed product, and a core tube drum 60 which is placed on a cut green sheet 80 while holding and cutting the core tube, and is wound up.

In the first embodiment, the green sheet 80 is formed by uniformly supplying the raw material slurry from the pad 50 onto the endless permeable belt 52 running in the direction of the arrow in the figure. The green sheet 80 is wound around a core tube (hollow) 70 to form a ceramic cylindrical body. Green sheet 80 disposed on running endless permeable belt 52
Is cut to a predetermined length by the sheet end cutter 54. The endless water-permeable belt 5 running on the green sheet 80 on the endless water-permeable belt 52 by clamping both ends of the core tube 70 on the side of the sheet end cutter 54 in the running direction of the endless water-permeable belt 52.
A core tube drum 60 for sequentially feeding the core tube 70 to the winding position of the green sheet 80 in synchronization with the speed 2 is provided. The sheet end cutter 54 of the core tube drum 60
A core tube supply device 56 for supplying a core tube to the core tube drum 60 is provided on the upper side, and a product removal device 58 is provided on the side of the core tube drum 60 opposite to the core tube supply device 56. Then, without stopping the running endless water-permeable belt 52, the green sheets 80 are sequentially wound around the core tube 70, and a ceramic cylindrical body is continuously formed and taken out.

Next, the operation of automatically winding the green sheet 80 around the core tube 70 will be described with reference to FIGS. The core tube drum 60 used here includes a clamp portion 62 for holding the core tube 70 by sandwiching it from both sides.
The core tube 70 is supplied to the clamp portion 62 from the core tube supply device 56. When the clamp portion 62 holds the core tube 70, the clamp portion 62 moves in the forward direction of the core tube 70 (the endless water-permeable belt 52).
Rotation direction), but not in the opposite direction.

The core tube 70, both ends of which are held by the clamp portion 62, is slightly separated from the endless water-permeable belt 52 at the position B and stands by at a position where it does not come into contact with the endless permeable belt 52. Then, the green sheet 80 is brought into contact with the endless water-permeable belt 52 (position B) and before (position A) the sheet end cutter 5.
4, a cut is made, and at the same timing when the cut comes to the position B, the core tube drum 60 is moved to the endless permeable belt 52.
And rotate to the winding position (position C) while synchronizing with. At this time, the core tube 70 is pressed against the endless permeable belt 52. When it comes to the winding position (position C), the press roll 90 is applied from below, and the green sheet 80 is wound up to a constant thickness.

By this winding, the green sheet 80
Becomes constant, the press roll 90 retreats downward, and the next core tube moves from position B to position C in the same manner as described above.
The core tube 70 that has been wound up moves to the position D together with the film for one pitch (between the position C and the position B). At this point, the green sheet 80 for one pitch is wound, and the felt roll 92 at the position D is lowered to a position separated from the core tube 70. Thereafter, the core tube 70 wound with a film is used.
Is automatically removed from the core tube drum 60 by the product take-out device 58 and transported to the curing room. After curing for a predetermined time, the core tube 7
Pull out 0. In the apparatus according to this embodiment, since the winding operation of the green sheet 80 is performed without stopping the endless water-permeable belt, it is possible to obtain a high-quality product having a uniform thickness and inconspicuous film seams. Can be.

FIG. 4 is a view showing a clamp portion 62 for clamping and supporting both ends of a core tube 70 provided at the end of an arm of a core tube drum 60 used in this embodiment. A substantially conical jig is provided at the end of the cylinder rod 64 so as to be rotatable only in the forward direction about the cylinder rod 64, and clamp support is possible regardless of the inner diameter of the core tube 70. In this figure, three types of core tubes 70 are shown being clamped. Since the clamp portion 62 has a substantially conical shape, it can be engaged with and held inside the core tubes 70 of various sizes as shown by the dotted lines. In addition, the force of the cylinder rod 64 causes the clamp 6
The position 2 moves back and forth.

In the present embodiment, the papermaking method is not particularly limited. For example, a green sheet formed by a conventional papermaking method such as a single-layer papermaking machine or a backflow papermaking machine is wound around a core tube to form a ceramic cylinder. The present invention relates to a device for continuously forming and removing a body and a manufacturing method. For curing, various conventional curing methods can be applied.

[0017]

According to the first aspect of the present invention, since the green sheet is sequentially wound around the core tube without stopping the running endless permeable belt, the efficiency of manufacturing a ceramic cylindrical body is increased. Further, since the endless water-permeable belt is not stopped, a product having a uniform thickness and excellent quality can be supplied. According to the second aspect of the present invention, since a substantially conical jig is provided at the tip of the cylinder rod, it is possible to cope with core tubes having different sizes. Claim 3
According to the described invention, it is possible to efficiently produce a high-quality ceramic cylinder having a uniform thickness and inconspicuous film seams.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating continuous supply of core pipes by a flow-on papermaking machine according to the present embodiment.

FIG. 2 is a diagram illustrating an operation of automatically winding a green sheet around a core tube.

FIG. 3 is a diagram illustrating an operation of automatically winding a green sheet around a core tube.

FIG. 4 is a diagram illustrating a configuration of a clamp unit.

FIG. 5 is a view showing a papermaking machine which is an example of an apparatus for producing a ceramic cylindrical body.

FIG. 6 is a view showing another papermaking machine.

FIG. 7 is a view showing a papermaking machine called a flow-on method.

FIG. 8 is a diagram showing an example of a fire-resistant two-layer pipe.

[Explanation of symbols]

 Reference Signs List 50 Bad 52 Endless permeable belt 54 Sheet end cutter 56 Core tube supply device 58 Product take-out device 60 Core tube drum 70 Core tube 80 Green sheet 90 Press roll 92 Felt roll

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-86115 (JP, A) JP-A-57-1708 (JP, A) JP-A-49-114624 (JP, A) 148305 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 21/00-23/22 B28B 1/00-1/54

Claims (3)

(57) [Claims] A green sheet is formed by uniformly supplying a raw material slurry onto a running endless permeable belt,
In a paper machine for winding the green sheet around a hollow core tube to form a ceramic cylindrical body, a sheet end cutter for cutting the green sheet into a predetermined length on a running endless water-permeable belt, and both ends of the core tube A core tube drum that supports the green tube on the running endless water-permeable belt in a synchronized manner with the speed of the running endless water-permeable belt and sequentially feeds the core tube to the green sheet winding position; A core tube supply device that supplies a core tube to the core tube drum, and a core tube removal device that takes out the core tube from which the green sheet has been wound up from the core tube drum, are supplied onto the green sheet by the core tube drum. When winding the green sheet around the core tube, the green sheet is sequentially wound around the core tube without stopping the running endless permeable belt. Ri work production apparatus for continuously producing ceramic-based cylindrical body and performs. 2. A substantially conical jig is provided at the tip of a cylinder rod so as to be rotatable around the cylinder rod, in order to clamp and support both ends of the core tube on the core tube drum.
2. A ceramic cylindrical body according to claim 1, wherein a holding portion capable of supporting the clamp is provided irrespective of the inner diameter of the core tube, and the core tube held by the holding portion is rotatable only in a forward direction. Manufacturing equipment that manufactures continuously. 3. A green sheet is produced by uniformly supplying a raw material slurry onto a running endless permeable belt by the production apparatus for continuously producing a ceramic cylindrical body according to claim 1 or 2. A cut is made to cut the green sheet to a predetermined length with a sheet end cutter on the running endless permeable belt, and when the cut reaches a predetermined position, the core pipe supplied by the core pipe supply device. The core tube drum with both ends clamped is
It rotates in synchronization with the speed of the running belt, supplies the core tube to the winding position while pressing it on the green sheet, winds the green sheet around the core tube, without stopping the running endless permeable belt,
A manufacturing method for continuously manufacturing a ceramic cylinder, which comprises continuously forming, removing, and curing a ceramic cylinder.