KR950004236Y1 - Piston ring structure of pipe molding machine - Google Patents

Abstract

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Description

Piston ring structure of pipe molding machine

1 is a block diagram of a teflon pipe molding machine to which the present invention is applied.

Figure 2 is a partially cutaway perspective view showing in detail the piston ring structure of the present proposal.

3 is a partial cross-sectional view showing only the main parts of the present proposal cut.

4 is an operation diagram showing the Teflon pipe molding machine forming process to which the present invention is applied. FIG. 4 (a) is a state diagram before operation, and FIG. 4 (b) is an operation diagram.

* Explanation of symbols for main parts of the drawings

7: pressure rod 9: support rod

10: piston 11: ring groove

3: forming chamber 12,13: compression ring

14: tapered surface

The present invention relates to a piston ring structure of a pipe forming machine for forming a solid pipe by compressing a powder material such as Teflon or other synthetic resin material to cause plastic deformation, and in particular, the piston is lifted and compressed to make a Teflon pipe. While maintaining the airtightness of the molding chamber to be molded at the same time to scrape the various foreign materials adhering to the inner diameter of the molding chamber to form a clean Teflon pipe.

Generally, pipes formed using Teflon, synthetic resin, etc. are used as parts of various machines requiring airtightness and watertightness, such as sheets, rings, gaskets, and packings of various valves, that is, molded pipes. It is manufactured to the required mechanical parts by reprocessing according to the intended use.

This pipe is formed by putting a powder of teflon or a synthetic resin raw material into a molding mold and pressurizing it with a piston to form a solid pipe, followed by heat treatment at a high temperature, that is, in a cylindrical molding chamber. By inserting the raw material of the raw material and pressurizing the raw material by the piston which is operated up and down in the molding chamber to form a plastic deformation by causing the plastic deformation.

Thus, the piston press-molding the powder raw material in the molding chamber is to be lifted by a separate hydraulic cylinder in the upper and lower, so as to compress the powder raw material in the molding chamber at a high pressure, the airtightness must be maintained between the molding chamber diameter.

However, in the conventional Teflon pipe forming machine, since the piston is made of metal and other synthetic resin material that matches the inner diameter of the molding chamber, the piston is easily worn by the frictional force, and thus the airtightness cannot be maintained. In addition, due to the above problems, various foreign matters and debris remain on the inner surface of the molding chamber, and thus are stuck to the outer surface of the molded product in the next work process, thereby deteriorating the quality of the molded product. It was caused.

For example, in the case of using a powder raw material having a pure white color, even if various foreign matters and debris stick to the outer surface to be molded a little, it is clearly displayed so that the quality of the product is remarkably deteriorated.

In addition, in order to rectify the above problems to some extent, it is also possible to use a compression ring of a material different from the piston to the outer edge of the piston as usual, but it can also maintain the airtightness by reducing friction between the piston and the inner diameter of the forming chamber. Although there was a problem that can not remove the various foreign matter and debris to stick to the inner diameter of the molding room.

Therefore, the present invention has been made in consideration of the above circumstances, and the purpose thereof is to improve the structure of the piston ring to remove various foreign substances and raw materials that cling to the inner diameter so that clean molded products can be molded and molded at the same time. To provide the piston ring of the pipe molding machine to maintain the airtightness of the room completely.

This object is achieved by molding a compression ring made of Teflon on the outer edge of the piston, that is, forming a ring groove on the outer edge of the piston and simultaneously molding the compression ring made of Teflon on the ring groove of the piston, and the outer end of the compression ring. It is characterized by scraping out various foreign substances and debris sticking to the inner diameter of the molding chamber while the piston is tapered to the outside while the piston moves up and down in the molding chamber.

Subsequently, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The drawings show the configuration of the present invention in detail. FIG. 1 is a schematic view showing the configuration of the molding machine 1 to which the present invention is applied.

The molding machine 1 includes a plurality of supports 2 fixed in a vertical direction, a fixed die 4 fixed to a central portion of the support 2 and having a plurality of molding chambers 3, and also the fixed dies. It is provided on the upper and lower portions of the upper and lower portions of the upper and lower conveying plates (5) and (6) and the upper and lower conveying plates (5) and (6), respectively. It consists of a pressurizing rod 7 which is inserted into the shaping chamber 3 of the stationary die 4 and pressurizes the raw material in powder form, and at the bottom thereof, a support rod 9 provided in the stationary plate 8 is provided at the lower portion thereof. It is the structure provided in the shaping | molding chamber 3 of the fixed die 4 through the inside of the pressure rod 7. As shown in FIG.

This configuration has the same configuration as in the prior art, but in the present invention is provided at the ends of the upper, lower pressure bar (7) to improve the piston ring inserted into the molding chamber 3, which is the second and third As shown in the figure, the piston 10 is integrally provided on the upper end of the pressure rod 7 which is lifted and operated while being inserted into and guided through the support rod 9 which is fixedly supported in the vertical direction in the center of the molding chamber 3. It is.

In addition, the upper and lower outer periphery of the piston 10 is provided with a pair of ring grooves 11, the ring groove 11 of the compression ring 12, 13 of the Teflon material is molded integrally with each other to form a piston (10) It is provided in such a way as to surround the outer edge of the).

In addition, the upper and lower outer peripheries of the upper and lower compression rings 12 and 13 are provided with tapered surfaces 14 that taper from the inside to the outside.

Therefore, the compression rings 12 and 14 configured as described above are integrally molded with the upper and lower parts of the piston 10, and thus are in contact with the inner diameter of the forming chamber 3 without flow due to the lifting operation of the piston 10. The lifting and lowering operation is performed, and accordingly, the airtightness in the molding chamber 3 is maintained according to the characteristics of the compression rings 12 and 13 made of Teflon material.

And, as the piston 10 as described above moves up and down into the molding chamber (3) various foreign matters adhered to the inner wall surface of the molding chamber (3) of the tapered surface 14 of the compression ring (12) (13) fixed thereto The scrapes will be scraped off.

That is, in other words, as shown in FIG. 4, the piston 10 enters the molding chamber 3 to pressurize the powder raw material, and then the compression ring provided in the piston 10 when exiting from the molding chamber 3 again. (12) (13) is to scrape off the various foreign matter and debris sticking to the inner diameter.

Therefore, this proposal has the effect of being able to maintain the air tightness in the molding chamber because the compression ring of the piston that pressurizes and molds the powder raw material in the solid state while lifting the inside of the molding chamber is composed of Teflon material. To have.

In addition, since the upper and lower ends of the compression ring have a tapered inner surface toward the outside, various foreign substances and debris adhered to the upper mold chamber inner wall can be scraped off cleanly to obtain a clean molded product, and molding The upper and lower ends of the molded article to be molded indoors will also have the effect of round forming by the tapered surface of the compression ring.

On the other hand, the present invention as described above is used to mold the pipe of the Teflon material, but it will be obvious that it can be used to mold not only pipes but also shaped articles using various synthetic resins.

Claims (1)

When the powder raw material is put into the stationary die and the upper and lower pistons are compressed to form a solid product, the upper and lower parts are formed by molding the ring grooves formed on the upper and lower outer edges of the piston to surround the piston. Piston ring structure of the pipe forming machine, characterized in that it has a compression ring, and a tapered surface tapered from the inner side to the outer end of the upper and lower compression rings.