JPS6111383A - Method of executing lining - 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 Field of the Invention The present invention relates to a method for lining the inner surface of a container, for example the inner surface of a motor case of a rocket.

(Prior Art) Conventionally, for example, when applying a rubber lining as an insulator to the inner surface of a motor case of a spherical rocket, the lining material such as an unvulcanized or semi-vulcanized rubber plate was formed into a ladder shape as shown in Fig. 6 CB). Cut into appropriate shapes such as
As shown in the figure, these cut pieces 1 are crimped one by one to the motor case 3 using a roller 2 while ramping their edges together, and pressing the lap portions together to seal the inner surface of the case. By heating and vulcanizing the second innings material thus deposited together with the motor case,
The case is baked and the lamp part is joined to form the lining.

Incidentally, M indicates a worker who is doing the above-mentioned crimping work.

(Problem) By the way, the above-mentioned crimping and pressing work is done while squeezing the cutting piece 1 by utilizing the layering properties and mutual adhesive properties of unvulcanized rubber, etc., so it is a considerable amount of physical work and requires constant work. This work involves confirmation. Therefore, worker M must necessarily work inside the container, and if the surface to be applied is a three-dimensional curved surface, he must place the next piece next to the previously crimped piece. The order of operations is serial, such as crimping. Therefore, especially for spherical containers or similar short cylindrical containers, the number of workers is limited to one person or 11 teams in terms of work space and order, and this makes the lining work extremely time consuming. The efficiency was low.

Therefore, an object of the present invention is to improve the above-mentioned work efficiency.

(Means of the Invention) The means of the present invention for solving the above problems includes the following steps when lining is performed using the cut piece.

1. Step of dividing and molding the second innings material to be applied to the inner surface of the container.

2. A process of sequentially inserting and temporarily attaching the two-inning materials that have been molded into a container into a container.

3. The process of covering the inner surface of the temporarily attached lining material with a breathable sheet.

4. Step of inserting an elastic bag to form a sealed space between it and the inner surface of the container.

5. The process of venting the closed space.

(Example) Figures 1 to 4 are diagrams illustrating the method of the present invention together with the tools used therein, and Figure 5 is a diagram schematically illustrating the motor case of the spherical rocket that was the subject of this embodiment. be.

First, in FIG. 5, 3 is the motor case, 3a is an opening for installing the rocket nozzle 4, and 5 is the nozzle 4.
It is screwed into a screw hole 6 provided around the opening 5 with a mounting bolt. A propellant 7 is deposited directly inside the lining 10 baked on the inner surface of the motor case 3 as described above.

In this embodiment, the lining 10 is connected to the motor case 3.
A front lining material 11 to be applied to the front of the half-mounted surface X-X, and a rear lining material 1 to be applied to the same rear side.
The lining material is divided into two parts and molded, and p is the thickness between these lining materials.

In FIG. 1, a mold 13 has a bowl shape as a whole and has a hemispherical molding surface 15 with a radius equal to the inner radius r of the motor case 3. This mold 13 is used to mold the front lining material 11, 11& is a circular piece of the lining material, 11b and 11c are the above-mentioned FIG. 6 ω)
With the ladder-shaped cutting pieces, first press the circular cutting pieces 11a to the bottom of the molding cup 15 using the row 22, and then attaching the ladder-shaped cutting pieces 11b and then the circular cutting pieces 11c to these cutting pieces 11a.
, 11b, and 11c are successively crimped while being lapped with each other, and the ramp portion is pressed into contact with each other. If the inner surface of the mold 13 is covered with the cut pieces 11a, 11b, lie, etc. in this way, r + 43/ from the bottom point of the molding surface 15.
2 (where r is the radius and 2 is the ramp) is cut (Y-Y)L with a knife or the like, and then released from the mold 13 to form the front lining material 11 as shown in the same figure). Ru.

In FIG. 2, reference numeral 14 denotes a mold for making the rear lining material 12, and a molding surface 16 similar to that of the mold 13 is shown.
In addition, a protrusion 18 corresponding to the nozzle attachment opening 3a is formed at the bottom of the molded surface. 1
Reference numeral 2a denotes an annular cutting piece, and after fitting this cutting piece into the protrusion 18 and crimping it to the molding surface 16, the ladder-shaped cutting pieces 12b and 12c are crimped and pressed together in the same manner as in FIG. Cut (Y-Y) and release from the mold to make the rear 2nd innings material 12
to form.

Figure 3 shows the front lining material 11 connected to the motor 5 - case 3.
This explains the process of inserting and temporarily attaching the lining material 11 into the opening 3, as shown in the figure.
Insert the lining material from a, and as shown in ) in the same figure, use the roller 2 with the long handle 2a to spread the lining material and press it to the motor case 3 at various points to temporarily attach it. Next, the rear lining material 12 is inserted and temporarily attached in the same manner, and the ship portion 1 is pressed at the appropriate position to maintain the shape of the entire second innings material. Next, the adapter 20 is attached to the opening 3a as shown in FIG. In this adapter 20, 21 is a cylindrical body, 22
7 langes are formed in this cylinder, 23 is an air vent hole, an O ring 24 is attached to the cylinder 21 and fitted into the opening 3a, a bolt 25 is inserted into the 7 flange 22, and the bolt 25 is inserted into the screw hole 6. The adapter 20 is attached by screwing and tightening.

Reference numeral 30 denotes a three-dimensionally breathable sheet such as a greaser cloth, and after the front and rear lining materials 11 and 12 are temporarily attached, the sheet 30 covers the inner surfaces of the members and the inner surface of the cylinder 21.

31 is a bag made of an elastic material such as rubber, and has a spherical part 31a.
and a cylindrical portion 31b. Insert the bag 31 through the adapter 20 and insert the spherical portion 31a into the sheet 30.
After placing the cylindrical portion 3Ib inside the adapter, the cylindrical portion 3Ib is folded back and placed over the cylindrical portion 21 of the adapter, which is then tightened with the band 26. As a result, a sealed space 32 extending from the inner surface of the motor case 3 to the inner surface of the adapter 20 is formed, and the vent hole 23 opens into this sealed space through the sheet 30.

Here, the air vent hole 23 is connected to a vacuum pump (not shown) to evacuate the air in the sealed space 32.

Therefore, in this venting step, the air remaining between the temporarily attached and shape-retained lining material 11.12 and the motor case 3 is sucked out through the sheet 30 from the gap in the lap of the cutting piece, and The bag 31 expands and presses the lining material through the sheet 30. By gradually maintaining this state by placing the closed space under a high vacuum, the lining materials 11 and 12 are closely pressed against the inner surface of the motor case 3, and the lap portions of each cutting piece are pressed. be touched.

After these steps are completed, the adapter 20 and the sheet 30
The process of removing the bag body 31 and thereafter applying lining by heating and vulcanizing is the same as in the conventional case.

(Effects) As explained above, according to the present invention, the lining material to be applied to the inner surface of the container is divided into a plurality of parts and these parts are molded outside the container, which facilitates the molding work and limits the work space. Since the work is not affected, the work can be done in parallel. In addition, since the work of adhering to the inner surface of the container is limited to temporary attachment, no manual labor is involved, so the worker can easily carry out the work from outside the container.

Therefore, the present invention improves work efficiency by taking all these aspects into account.

[Brief explanation of the drawing]

1 to 4 are explanatory views of one embodiment of the present invention, in which FIGS. 1 and 2 are explanatory views of the first process, FIG. 3 is an explanatory view of the second process, and FIG. 4 is an explanatory view of the second process. 3 and 4 are explanatory diagrams, FIG. 5 is an explanatory diagram of the container targeted by the above embodiment, and
The figure is an explanatory diagram of a conventional enforcement method. 3... Container (rocket motor case) 10...
Lining material 11... Front lining material 12... Rear lining material 13.14... Molding mold 15.16... Molding surface 20... Attachment 23... Air vent hole 30.
...Breathable sheet 31...Bag body 32...Closed space Figure 2 Figure 3 Figure 4 Figure 5 × Figure 6

Claims (1)

[Claims] The first step is to divide and mold the lining material to be applied to the inner surface of the container, the second step is to sequentially insert and temporarily attach the divided lining materials into the container, and the inner surface of the temporarily attached lining material is covered with a breathable sheet. A method for lining a container, comprising: a third step of covering the container with water; a fourth step of inserting an elastic bag to form a sealed space between the inner surface of the container; and a fifth step of venting air from the sealed space.