RU2515650C1 - Pressing unit of automatic press machine (apm) - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: APM pressing unit comprises interconnected punch and stem with a longitudinal channel where a pipeline with a sealing element at rear end is installed with a gap, the front end of the pipeline is fitted with a hollow tail piece of a hollow disk placed in the punch cavity with a gap with the tail piece being connected to the stem as well. A longitudinal channel and cross ports looking at the stem bottom are provided in the walls of the rear and front connection parts of the stem, and the second sealing element is located at the connection part of the stem. The cross ports in its front part are made as an annular gap formed by the surfaces of the punch, front end face of the stem, tail piece and rear end face of the disk and the stem open to the longitudinal channel through the longitudinal grooves of the joint "stem - disk tail piece".

EFFECT: higher reliability and better manufacturability of the pressing unit.

1 dwg

Description

The invention relates to the glass industry and can be used in the manufacture of tools for the manufacture of hollow glass products.

Known pressing unit horizontal cold chamber injection molding machines (MLPD) (see RF patent No. 2043850 from 09/20/95), containing a piston in the cavity of which is placed and connected to it by a rod with a longitudinal channel, where a pipeline with a sealing is located with a gap an element at the rear end, and at the front end, a hollow shank with a disk, placed without a gap between the bottom of the punch and the end of the disk, on which lateral channels are made that extend into the cavity of the shank, fixed by a thread and a pin with a rod having no longitudinal channel walls and windows under the coolant cross connected with the longitudinal recesses of its connecting parts, sealed with a sealing member.

Its disadvantage: due to the lack of a gap between the bottom of the piston and the front end of the disk, this bottom is not washed by the refrigerant and, therefore, its front end is not cooled. Therefore, due to overheating of the front part, a node of this design is not applicable for the manufacture of glass.

A known APM pressing unit (see application 2000129496/03 of 11.24.2000) containing a punch and a rod connected to each other with a longitudinal channel, a pipe with a sealing element at the rear end, connected with a one-piece front end with a hollow shaft, is installed with a gap a hollow disk, and the disk is placed with a gap in the cavity of the punch: while in the drains of the rear of the stem there are transverse windows extending into its longitudinal channel and bottom, and in its front into the longitudinal channel and the annular groove with another sealing element; this groove is connected to the longitudinal grooves of the connecting part of the rod, which are open in the lateral gap between the disk and the punch.

Its disadvantage: the low-tech stem due to the transverse windows in its front part, open in the longitudinal grooves of its connecting surface under the punch. When this surface is threaded due to grooves on it, the contact area of the threaded surfaces of the rod and punch decreases, which forces them to increase their length and, consequently, the metal consumption for their manufacture. The circulation of the refrigerant - water along these channels leads to corrosion of the threaded surfaces of the stem and punch, which makes it difficult to disassemble them when changing the punch.

The task of the invention is to remedy these disadvantages and, thus, increase manufacturability, reliability while reducing material costs for this site.

This goal is achieved by the fact that the APM pressing unit, containing a punch and a rod connected with each other with a longitudinal channel, in which a pipeline with a sealing element is installed with a gap at the rear end, and at the front end the hollow shaft of the hollow disk placed with it with a gap in the cavity of the punch, while in the walls of the rear part and the front connecting part of the rod there are transverse windows extending into its bottom and longitudinal channel, and another sealing element is placed on flax stem portion; the transverse windows in the front of the rod are made in the form of an annular gap formed by the surfaces of the punch, the front end of the rod, the shank and the rear end of the disk and open into the longitudinal channel of the rod through the longitudinal grooves of the connection "rod - disk shank".

By making transverse windows in the front of the rod in the form of an annular gap, which is formed by the surfaces of the punch, rod, shank and rear end of the disk, the manufacturability of this assembly is increased due to the absence of transverse windows open into the longitudinal channel of the rod.

With this gap, there is no need for longitudinal grooves of the connecting (threaded) surface of the rod, with which the corresponding surface of the punch is in contact, which also increases the manufacturability of the first.

Due to the absence of these grooves on the rod, its connecting threaded surface will be of minimum length, which will also positively affect its manufacturability and reduce the length of the punch and its material consumption.

This annular gap is opened into the longitudinal channel of the rod through the longitudinal grooves of the stem – disk shank connection, which complicates the manufacture of the disk shank due to the execution of these grooves on its lateral surface, because of its shorter length compared to the length of the connecting surface of the rod ensures the achievement of the above effect in the latter.

The above increases the reliability and manufacturability of this node, and also reduces the consumption of metal for its manufacture.

The above indicates that the proposed solution meets the criterion of "novelty", and comparing it with known solutions has shown that it has significant differences and therefore meets the criterion of "invention".

Figure 1 presents a longitudinal section of the proposed site.

It contains a punch 1 with a cavity 2, in which the rod 3 is placed with its front connecting part 4 (thread), the rod has a longitudinal channel 5, where the pipe 6 is installed with a gap, having a sealing element 7 at the rear end, and one-piece on the front end the hollow shank 8 of the hollow disk 9 connected to it and detachably with the rod, located with side gaps 10 and end 11 in the cavity 2 of the punch; the rear end of the disk 9 is separated with an axial clearance from the front end of the rod 3 having transverse windows 12 and 13 included in the longitudinal cocoa 5 and its bottom; the surfaces of the rear end of the disk 9, the shank 8, the front end of the rod 3 and the punch 1 formed an annular gap 14, open in the longitudinal channel 5 of the rod 3 through the longitudinal grooves 15 of the connecting threaded surface of the shank 8; an additional sealing element 16 is placed on the front of the stem 3 to seal the refrigerant circulation zone of this assembly; the punch 1 with the stem 3 can be additionally fixed, for example, with a screw 17 screwed into the wall of the punch and placed in front of the socket or ring groove of this rod or other fixing element.

The cooling of the punch 1 was carried out as follows: the refrigerant was introduced through the transverse window 13 to the rear end of the pipeline 6, then along its axial channel 18, and then the axial channel 19 of the hollow shank 8 and the disk 9 enters the bottom of the punch 1, spaced from the end of the disk 9 with a gap of 11 , and then, along the side gaps 10, it enters the annular gap 14, and from it through the longitudinal grooves 15 of the rod-shank connection rushes into the longitudinal channel 5, from which through the transverse window 12 the refrigerant heated by the heat of the punch 1 is discharged outside the rod 3.

The amount of refrigerant flow provides the optimum level of heating of the punch, which allows to obtain high-quality glass products.

The transverse windows for the circulation of refrigerant in the front of the rod 3 are made in the form of an annular gap 14 formed by the surfaces of the punch 1, the rear end of the disk 9, the shank 8 and the front end of the rod 3. This gap is obtained when assembling the proposed pressing unit APM due to the dimensions of the above elements . Therefore, there is no need to drill these transverse windows in front of the rod 3, which improves the manufacturability of the proposed site.

The formation of longitudinal grooves 15 for the circulation of the refrigerant in the connection, for example, threaded, "rod 3 - shank 8" of the disk 9 reduces the time for their execution, since the length of this connection is less than the length of the connection "punch-rod" due to the lack of load on it compared with the latter, perceiving the force of formation of the product from liquid glass.

The absence of longitudinal grooves in the “punch-rod” connection under the refrigerant circulating through them decreases its length to at least 10 threads of the required pitch, thereby reducing the length of the punch 1 and rod 3 and the cost of materials for their manufacture, which increases their manufacturability.

By circulating the heated refrigerant in the annular gap 14, and not along the “punch-rod” connection, and the presence of an additional sealing element 16 in the front or rear of the connection, corrosion of the threads of the punch 1 and stem 3 from the heated refrigerant is excluded, which facilitates corrosion of the threads 16 at the front or rear of the joint, corrosion of the thread of the punch 1 and stem 3 from heated refrigerant is excluded, which facilitates the disassembly of this assembly to replace a worn punch 1, increases the disassembly of this assembly to replace a worn out This punch 1, increases the service life of the thread of the rod 3 and, thus, increases the reliability of the proposed site.

Thus, the proposed piston assembly APM increase it: reliability due to the exclusion of contact of the refrigerant with the connecting threaded surfaces of the rod and punch, and, consequently, their corrosion; manufacturability due to the annular gap formed by the surfaces of the rear end of the disk, its shank, the front end of the stem, the inner side surface of the shank, and reduces the metal consumption for the manufacture of the punch due to the reduction of its length due to the shortened thread under the threaded surface of the stem.

Claims (1)

The APM pressing unit, containing a punch and a rod connected to each other with a longitudinal channel, in which a pipeline is installed with a gap with a sealing element at the rear end, and at the front end there is also a hollow shank of a hollow disk placed with a gap in the punch cavity, while in the walls of the rear and front connecting parts of the rod there are transverse windows extending into its bottom and a longitudinal channel, the second sealing element being placed on the connecting part of the rod, characterized in that pepper windows in front of it are in the form of the annular gap formed by the surfaces of the punch, the front end of the rod, the shank and the rear end face of the disk and open into the longitudinal channel through the rod longitudinal grooves compound "rod - drive shank."

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