JP4130916B2 - Partition plate for barrel tank - Google Patents

Description

The present invention relates to an improvement in a partition plate that divides a space in a barrel tank for barrel polishing into a plurality of polishing chambers.

As shown in FIG. 1, the conventional partition plate for barrel tank 1 (Japanese Patent No. 3396588) is fixed to the barrel tank inner wall 14a by pressing and fitting one press-fit plate 3 into one position of the main body plate 2. It was. In order to fix the partition plate 1, first, the main body plate 2 is inserted into the barrel tank 12, and then the press-fitting plate 3 is fitted into a corresponding portion, and then the tightening bolt 9 is inserted from above to enter the main body plate. Tighten to the nut 15 fixed at the bottom. Then, the press-fitting plate 3 is gradually pushed in and the upper portion of the main body plate 2 is expanded and deformed to be crimped and fixed to the barrel tank inner wall 14a. Since such a partition plate 1 can be fixed at any position in the barrel tank according to the size of the workpiece to be polished, it is very convenient and low cost, and has been used in many barrel polishing workplaces. It was.

By the way, the barrel tank 12 in which the partition plate 1 is inserted generally comprises a steel casing 13 and a lining 14 made of urethane resin or the like inside. In order to implement this lining 14, a middle mold (not shown) is inserted with a space having a certain thickness between the casing 13 and molten urethane resin is poured into the space formed by the casing 13 and the middle mold. And then cooled and solidified. The urethane resin shrinks when cooled and solidified, but the amount of shrinkage differs between the central part A and the side parts B and C of the barrel tank shown in FIG. 3, and as a result, the thickness of the lining 14 is thin at the central part A and the end part B, C was thicker than that. When the partition plate 1 is fixed to the barrel tank 12, the upper portion of the main body plate 2 is expanded and deformed, and only the upper two crimping forces are used. Therefore, the partition plate 1 fixed at the central portion A and the end portions B and C The fixing strength was different from that of the partition plate 1 fixed in (1), and a polishing chamber having sufficient strength could not be obtained.

Recently, for the purpose of reducing the weight of the barrel tank and prolonging the lining life, the barrel tank 10 which is not made of the steel casing 13 and is formed of urethane resin as shown in FIG. 2 may be used. . In order to obtain the urethane barrel tank 10, a middle mold (not shown) is charged with a constant thickness space between the barrel tank-shaped outer mold, and molten urethane is introduced into a space constituted by the outer mold and the middle mold. Pour resin and solidify by cooling. Since everything is molded with urethane resin, the urethane resin is poured into the thicker space than when urethane lining is applied to the steel casing. The barrel tank 10 thus obtained also has different thicknesses at the central part A and the end parts B and C in FIG. Therefore, when the partition plate 1 is fixed to the urethane barrel tank 10, the fixing strength is insufficient as in the former case. Moreover, when the press-fit plate 3 is pushed into the main body plate 2, the barrel tank 10 swells, and there is a problem that the fixing strength is further insufficient.
Japanese Patent No. 3396588

Accordingly, the problem to be solved by the present invention is to provide a barrel tank partition plate that can firmly fix the partition plate even if the lining thickness in the barrel tank is not uniform.

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a main body plate that is pressure-bonded to the inner wall of the barrel tank, and a press that causes the main body plate to be expanded and deformed and press-fitted to the inner wall of the barrel tank In the partition plate that divides the inner space of the barrel tank composed of a fitting plate into a plurality of polishing chambers, the press-fitting plates are respectively fitted from the mutually opposing locations on the main body plate. Next, the invention according to claim 2 is the one according to claim 1, wherein at least one surface of the barrel tank wall to which the main body plate is crimped is resin-molded from the barrel tank inner wall to the barrel tank outer wall. And Next, the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, a packing member is attached to a surface of the main body plate to be pressure-bonded to the inner wall of the barrel tank.

According to the first aspect of the present invention, since the press-fitting plates are press-fitted to the opposite portions of the main body plate, the upper and lower portions of the main body plate are expanded and deformed, respectively, and are crimped to the inner wall of the barrel tank at four locations. Since it is fixed, the fixing strength is increased, and a polishing chamber having sufficient strength can be obtained. Moreover, according to the invention which concerns on Claim 2, the grinding | polishing chamber provided with the further intensity | strength can be obtained. Further, according to the invention of claim 3, since the packing member is attached to the main body plate, even if the main body plate tries to inflate the barrel tank, the packing member absorbs the expansion, so that the polishing chamber has sufficient strength. Can be obtained.

The present invention will be described with reference to FIG. The barrel tank partition plate 1 of the present invention comprises a main body plate 2 and a press-fit plate 3 (3a, 3b). The main body plate 2 is obtained by molding polyurethane resin, and two portions are cut out so that the press-fitting plate 3 is fitted, and the upper and lower penetrations are made so that a clamping bolt 9 described later can be inserted into the center portion. A hole 2a is formed. Block-like sponge rubber 4 is attached to the upper and lower portions of the hole 2a for the purpose of absorbing the movement when the press-fitting plate 3 is pushed in and for preventing the polishing stone from moving to the adjacent chamber. A hole 4 a is also formed in the rubber 4 so that the fastening bolt 9 can be inserted. A slit 5 is formed along the outer peripheral edge of the surface of the main body plate 2 to be crimped to the barrel tank, and a rubber packing 6 having a half-moon cross section is attached to the main plate 2 for the purpose of strengthening the crimping of the main body plate 2. Here, the material of the packing member is rubber, but the material may be softer than polyurethane. The main body plate 2 has a hexagonal cross-sectional shape because the barrel tank has a hexagonal cross-section. However, if the barrel tank is another polygonal shape, it may be matched to it, and the barrel tank may be circular. In this case, the main body plate 2 is also circular.

The two press-fit plates 3 to be pushed into the main body plate 2 are also obtained by molding polyurethane resin, and the shape thereof is substantially triangular, and upper and lower through-holes 3c are formed so that the tightening bolts 9 can be inserted into the center portion. Has been. A block plate 8 with a threaded hole into which a tightening bolt 9 is screwed into the lower end of the lower press-fit plate 3b is attached to the upper end of the upper press-fit plate 3a. Is fixed. A long fastening bolt 9 having a nut on the head is connected to a holed base plate 7, an upper press-fit plate 3a, a sponge rubber 4, a main body plate 2, a sponge rubber 4 and a lower press-fit plate 3b. And is screwed into the block body 8 with screw holes.

The barrel tank 10 to which the partition plate 1 is pressure-fixed is configured by inserting an intermediate mold (not shown) between the barrel tank-shaped outer mold while maintaining a space of a certain thickness, and the outer mold and the middle mold. The molten polyurethane resin is poured into the space and cooled and solidified. This urethane barrel tank 10 is manufactured for the purpose of reducing the weight of the barrel tank and extending the life of the lining. To reinforce part of the tank wall, a steel plate is embedded or fixed with bolts. Also good. In short, it is sufficient that at least one surface of the barrel tank wall 10a to which the partition plate 1 is fixed by pressure bonding is resin-molded from the barrel tank inner wall 10b to the barrel tank outer wall 10c. The upper end of the barrel tank 10 has an opening 11 so that a lid (not shown) can be attached.

Next, a procedure for fixing the partition plate 1 of the present invention to the barrel tank 10 will be described. First, the upper push-fit plate 3a and the lower push-fit plate 3b are combined with the main body plate 2, and the fastening bolt 9 is attached from above to the seat plate 7 with a hole, the upper push-fit plate 3a, the sponge rubber 4, the main plate 2, and the sponge rubber. 4 and the lower push-fit plate 3b are inserted in this order, and lightly screwed into the block body 8 with screw holes. In this state, the barrel tank 10 is charged, and the partition plate 1 is set so as to be orthogonal to the rotation axis D of the barrel tank, for example, at the center A of the barrel tank 10 shown in FIG. Next, fully tighten the nut on the head of the tightening bolt 9 with a tool or the like. By this operation, the upper part of the main body plate 2 is expanded and deformed and fixed to the barrel tank inner wall 10b by crimping. Similarly, the lower part of the main body plate 2 is also fixed to the barrel tank inner wall 10b by pressure bonding. At this time, the central portion A of the barrel tank is pressed by the main body plate 2 to expand, but the rubber packing 6 on the outer peripheral edge of the main body plate 2 absorbs the expansion. Moreover, although the center part A of the barrel tank 10 is thin compared with the side parts B and C by shrinkage | contraction at the time of solidification, if the partition plate 1 of this invention is used, the distortion can fully be absorbed. Thus, the polishing chamber E having sufficient strength is formed. Further, for example, if the barrel tank is partitioned into four sections, the partition plate 1 may be set on the side portions B and C shown in FIG. The partition plate 1 can be partitioned at an arbitrary position according to the size of the workpiece to be polished. Next, polishing stones, water, compound and workpiece are put into each polishing chamber E. Finally, the barrel tank opening 11 is covered and set in the barrel polishing machine, and the barrel tank 10 is rotated around the rotation axis D to rotate the workpiece. To polish.

(Second Embodiment) Next, with reference to FIG. 5, a description will be given of a barrel tank comprising a steel casing. The barrel tank 12 includes a casing 13 obtained by welding a hexagonal steel plate to both ends of a steel plate bent into a hexagonal cross section, and a polyurethane lining 14 lined on the inner wall thereof. . In order to implement this lining 14, as in the above-described embodiment, a middle mold (not shown) is inserted while maintaining a space between the casing 13 and melted into a space formed by the casing 13 and the middle mold. Pour polyurethane resin and solidify by cooling. When the lining is solidified, the medium mold is removed to complete. The lining thickness at this time is thinner than that of the above embodiment.

Even in the case of this steel barrel tank 12, the partition plate 1 can be similarly crimped and fixed. That is, the fastening bolt 9 is inserted through the combination of the main body plate 2 and the upper and lower press-fit plates 3. This is set and fixed at a desired position in the barrel tank 12. When the barrel tank 12 is a steel casing 13, only the shrinkage accompanying the cooling and solidification of the lining 14 becomes a problem, and the barrel tank does not swell due to the pressing of the main body plate 2. Therefore, the rubber packing 6 is not particularly required on the outer peripheral edge of the main body plate 2. Thus, a polishing chamber E having sufficient strength is formed.

Partial sectional front view showing a state in which a conventional partition plate is fixed to a barrel tank Partial sectional front view showing a state in which a conventional partition plate is fixed to another barrel tank A plan view of a conventional partition plate fixed to a barrel tank The partial cross section front view which fixed the partition plate of this invention to the barrel tank of 1st embodiment The partial cross section front view which fixed the partition plate of this invention to the barrel tank of 2nd embodiment The top view which fixed the partition plate of this invention to the barrel tank

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Partition plate 2 Main body plate 3 (3a, 3b) Press-fit board 10a Barrel tank wall 10b Barrel tank inner wall 10c Barrel tank outer wall 6 Packing member

Claims (3)

A barrel tank inner space is divided into a plurality of polishing chambers consisting of a main body plate that is crimped to the inner wall of the barrel tank and a press-fit plate that is press-fitted to the main body plate to expand and deform the main body plate to be crimped to the inner wall of the barrel tank. The partition plate for a barrel tank, wherein the press-fitting plate is press-fitted from mutually opposed locations on the main body plate. The barrel tank partition plate according to claim 1, wherein at least one surface of the barrel tank wall to which the main body plate is pressure-bonded is resin-molded from the barrel tank inner wall to the barrel tank outer wall. The partition plate for a barrel tank according to claim 1 or 2, wherein a packing member is attached to a surface of the main body plate that is crimped to the inner wall of the barrel tank.

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