KR20220102814A - device for exchanging a sleeve contact ring of plunger in die casting machine - Google Patents

Abstract

The invention provides a device for exchanging a sleeve contact ring of a plunger for a die-casting machine. The device includes: a main body unit which has a first vertical post and a second vertical post extending vertically at a certain height from both ends of a horizontal post and is fixedly installed on the floor; a moving unit which has a rail fixedly installed on the upper surface of the horizontal beam and a guider assembled to be slidable, and a moving block coupled to the guider, and which reciprocates between the first and second vertical posts; an operation unit which includes an operating shaft of a certain length, which is screw-coupled to a first female screw hole penetratingly formed in a second vertical post and screw-coupled to a second female screw hole formed in the moving block, and reciprocates the moving block by the rotation of the operating shaft; and a retaining unit which has a first block disposed on the first vertical post and having a first retaining piece formed at an edge portion corresponding to the moving block, and a second block disposed on the moving block and having a second retaining piece formed at an edge portion corresponding to the first retaining piece, and is fit and retained to a cut portion formed on the sleeve contact ring. By rotating the operating shaft, a distance between the first and second retaining pieces fit and arranged to the cut portion is widened to attach or detach the sleeve contact ring from the header. Therefore, the present invention allows workers to perform tasks easily.

Description

A sleeve contact ring replacement device for a plunger for a die casting casting machine {device for exchanging a sleeve contact ring of plunger in die casting machine}

The present invention relates to a device for replacing the sleeve contact ring of a plunger provided in a die casting casting machine, and more particularly, to remove a worn or damaged sleeve contact ring from a header of a plunger tip while separating it or to reinstall a new sleeve contact ring to the header It relates to a sleeve contact ring replacement device for a plunger for a die-casting casting machine that can be easily performed by an operator.

Casting technology is an economical method to obtain a shape by making a mold with a space of the opposite shape of the desired shape, and injecting a high-temperature liquid metal into the cavity of the mold to obtain a shape. It is a core parts industry that determines the competitiveness of not only traditional industries such as automobiles, shipbuilding, and machine tools, but also various IT industries that are emerging recently.

Among these casting technologies, die casting refers to casting by press-fitting molten molten metal into a mold of a predetermined shape at a pressure higher than atmospheric pressure and pressurizing until the end of solidification. It has the advantage that it is possible and is widely used in the manufacture of molds for automobile parts, etc.

And, there are two types of die casting machines, a hot chamber and a cold chamber machine. The former is mainly used for alloys with a low melting point such as tin, zinc, or lead, and the latter is copper, magnesium, or aluminum. It is used for casting alloys with relatively high melting points among non-ferrous metals such as alloys.

Figure 1 is a schematic diagram showing a general die-casting casting apparatus, Figure 2 is a configuration diagram showing a plunger tip applied to a general die-casting casting apparatus.

As shown in FIGS. 1 and 2, a general die-casting casting apparatus includes a hollow sleeve 30 having an injection hole 31 formed on one end thereof, and a molten metal as a molding material located at the upper end of the injection hole 31 in the injection hole 31 ) When the molten metal is injected into the hollow sleeve 30 and filled through the nozzle part 40 and the nozzle part 40 to the side, it is combined with the piston rod 20, and the plunger tip 10 is attached to the front end. Casting the casting by forcibly moving the molten metal in the hollow sleeve toward the cavity 50 by a certain amount while reciprocating the plunger tip inside the hollow sleeve by the piston rod, including the replaceable rod-shaped plunger 10a it will produce

As shown in FIG. 2, the plunger tip 10 includes a holder 11 having a female screw portion screwed with a male screw portion formed at the tip of the piston rod, and a male screw portion formed on the outer surface of the holder so as to be screwed together. It includes a header 12 having a female threaded portion and contacting the molten metal filled in the hollow sleeve, and a sleeve contact ring 13 in contact with the inner circumferential surface of the hollow sleeve during casting.

The sleeve contact ring 13 is separated from the outer surface of the header when worn or damaged, and is cut so as to be elastically widened in the process of mounting as a new part, and each has cutouts 13a whose ends face each other. do.

On the other hand, in the process of producing a die-casting product by injecting molten metal into the cavity by repeated reciprocating motion of the plunger tip inside the hollow sleeve, the sleeve contact ring provided in the plunger tip is in direct contact with the inner surface of the hollow sleeve As they wear out or become damaged, they have to be replaced periodically with new parts.

However, the operation of replacing the sleeve contact ring from the outer surface of the header is performed by an operator using a hand tool such as tongs to forcibly spread the cutout of the sleeve contact ring to enlarge the inner diameter of the sleeve contact ring. It increases the workload of the operator because it has to be removed by removing it from the header or a new sleeve contact ring must be replaced on the outer surface of the header. It acted as a cause of lowering work productivity.

(Patent Document 1) KR10-1855983 B1

(Patent Document 2) KR10-1855983 Y1

Accordingly, the present invention is to solve the above problems, and the purpose is to make it easier for the operator to remove the worn or damaged sleeve contact ring from the header of the plunger tip under separation or to reinstall the new sleeve contact ring to the header. An object of the present invention is to provide an apparatus for replacing a sleeve contact ring of a plunger for a die-casting casting machine that can be performed.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

As a specific means for achieving the above object, a preferred embodiment of the present invention is provided in a plunger tip that reciprocates along the inside of the hollow sleeve filled with molten metal to replace the sleeve contact ring that is external to the hollow sleeve. An apparatus comprising: a main body having first and second vertical bars extending vertically to a predetermined height at both ends of a horizontal bar and being fixedly installed on a floor surface; a moving unit having a rail that is fixedly installed on the upper surface of the horizontal stand and a guider that is slidably assembled, and a moving block coupled to the guider to reciprocate between the first and second vertical stands; An operation unit having an operation shaft of a certain length screwed to the first female screw hole formed through the second vertical stand and screwed to the second female screw hole formed in the movable block to reciprocate the movable block by rotation of the operation shaft. ; and a first locking piece provided in a corner portion corresponding to the movable block, a first block provided on the first vertical stand, and a second locking piece provided in a corner portion corresponding to the first locking piece, the movable block The first and second locking pieces fitted in the cutout by the rotation operation of the operating shaft, including; It provides a sleeve contact ring replacement device for a plunger for a die-casting casting machine, characterized in that the sleeve contact ring is detached from the header by widening the gap between the engaging pieces.

In this case, the operation unit may include a stopper tube of a certain length, the other end is fixed to one side of the second vertical bar so that the front end faces and corresponds to the moving block at a predetermined interval, and the operation shaft is disposed in the inner hole. .

At this time, the stopper tube has a fastening part screwed to an annular female threaded part formed on one side of the second upright bar so as to adjust the distance formed between the moving block and the second upright bar at the end facing the second upright bar. can be provided

At this time, the front end of the stopper tube facing the moving block may include at least one sensor member for generating a detection signal when in contact with the moving block.

In this case, the first block and the second block are detachably assembled by a plurality of fastening members on the upper surfaces of the first and second vertical bars, or are integrally formed at each upper end of the first and second vertical bars. can be made with

According to the preferred embodiment of the present invention as described above, there are the following effects.

The inner diameter of the sleeve contact ring can be enlarged by widening the cutout of the sleeve contact ring by opening the first and second locking pieces of the first and second blocks fitted in the gap formed in the cutout of the sleeve contact ring by rotating the operating shaft. Therefore, the work of separating the sleeve contact ring with the enlarged inner diameter from the outer surface of the header and mounting it on the outer surface of the header can be performed simply and safely without any work load, thereby increasing work productivity.

1 is a schematic diagram showing a general die-casting casting apparatus
2 is a configuration diagram showing a plunger tip applied to a general die-casting casting apparatus.
3A and 3B are overall perspective views illustrating a sleeve contact ring replacement device of a plunger for a die-casting casting machine according to an embodiment of the present invention.
4A and 4B are exploded perspective views illustrating a sleeve contact ring replacement device of a plunger for a die-casting casting machine according to an embodiment of the present invention.
Figure 5 is a cross-sectional view showing a sleeve contact ring replacement device of the plunger for a die-casting casting machine according to an embodiment of the present invention.
5 is a cross-sectional view showing another stopper tube is applied in the sleeve contact ring replacement device of the plunger for a die-casting casting machine according to an embodiment of the present invention.
Figure 6 is a use state diagram showing a sleeve contact ring replacement device of the plunger for a die-casting casting machine according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment in which a person of ordinary skill in the art to which the present invention pertains can easily practice the present invention will be described in detail. However, in the detailed description of the structural principle of the preferred embodiment of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when it is said that a part is 'connected' with another part, it is not only 'directly connected' but also 'indirectly connected' with another element interposed therebetween. include In addition, 'including' a certain component does not exclude other components unless otherwise stated, but means that other components may be further included.

The sleeve contact ring replacement device 100 of the plunger for a die-casting casting machine according to a preferred embodiment of the present invention is a hollow sleeve 30 filled with molten metal during casting, as shown in FIGS. 3a, 3b and 4a, 4b. It is provided on the plunger tip 10 of the plunger 10a that reciprocates along the inside of the It may include a body part 110 , a moving part 120 , an operation part 130 , and a locking part 140 .

As shown in FIGS. 3A, 3B, 4A, 4B, and 5, the body part 110 is a metal structure fixed to the floor surface, and the body part 110 is a horizontal stand 111. It is a metal block structure having a substantially C cross-section including a first vertical stand 112 and a second vertical stand 113 extending approximately vertically from the upper surface of both ends to a predetermined height.

A rail 121 coupled to the moving unit 120 is fixedly installed on the horizontal upper surface of the horizontal stand 111 , and the first of the engaging unit 140 is installed at the upper end of the first vertical stand 112 . The block 141 is coupled and fixedly installed, and the second vertical stand 113 is provided with a second female screw hole 126 formed so that the operating shaft of the operation unit is screwed.

As shown in FIGS. 3A, 3B, 4A, 4B and 5, the moving part 120 includes the first vertical stand 112 and the second vertical stand 112 when the sleeve contact ring 13 is disassembled and mounted. It is a moving structure reciprocating between the vertical stand (113).

This moving part 120 is provided with a guider 122 that forms a rail groove 123 so as to be slidably assembled with a rail 121 fixedly installed on the upper surface of the horizontal stand, and is coupled to the guider 122. It includes a moving block (125).

The moving block 125 has a second female screw hole 126 formed to be screwed with the tip of the operating shaft of the operating unit, and the upper surface of the moving block 125 includes a second block 143 of the engaging unit. It can be combined and fixedly installed.

As shown in Figs. 3a, 3b, 4a, 4b and 5, the operation unit 130 is a moving block disposed between the first vertical stand 112 and the second vertical stand 113. (125) is to reciprocate.

This operation unit 130 is formed through the second vertical stand 113 and is screwed with the first female screw hole 136 forming a female screw portion on the inner circumferential surface, and is formed through the body of the moving block 125 and is formed through the inner circumferential surface. It includes a second female screw hole 126 having a female screw portion formed therein and an operation shaft 131 of a predetermined length to which the tip is screwed.

The operation unit 130 has the other end fixed to one side of the second vertical stand 113 so that the front end faces and corresponds to the moving block 125 at a predetermined interval, and the operation shaft 131 is drilled into the inner hole. It may include a stopper tube 135 of a certain length disposed in the.

The distal end of the stopper tube 135 in which the moving block 125, which is horizontally moved to the second vertical stand by the forward rotation operation of the operating shaft 131, is fixed to one side of the second vertical stand 113, and It is possible to prevent the movement block 125 from being excessively horizontally moved more than necessary by stopping the rotation of the operating shaft while in contact.

Here, the front end of the stopper tube 135 facing the moving block 125 may include at least one sensor member 35a for generating a detection signal upon contact with the moving block.

Accordingly, according to the rotation direction and the amount of rotation of the operating shaft gripped and operated by the operator, the moving block is moved horizontally by a certain length so as to move away from the first vertical band and close to the second vertical band or close to the first vertical band. And it can be moved horizontally by a certain length so as to move away from the second vertical band.

It is preferable that the operation unit 130 has a handle at the rear end of the operation shaft 131 to facilitate the rotation operation of the operator.

On the other hand, the rear end of the stopper tube 135, the front end of which faces the moving block 125, is in contact with one side of the second vertical stand 113 and is integrally fixed and installed by a welding method or an adhesive method. However, although illustrated and described as being limited thereto, the rear end of the stopper tube 135 is installed on one side of the second vertical stand 113 in an assembly and coupling manner so that the distance with the moving block can be adjusted. can be

That is, as shown in FIG. 6 , the stopper tube 135 is horizontally moved during the rotation operation of the operating shaft by adjusting the interval formed between the moving block 125 and a moving block in contact with the tip of the stopper tube. It may include a fastening portion 135b screwed to correspond to the annular annular female screw portion 113a formed on one side of the second vertical stand 113 to adjust the maximum horizontal movement distance of the .

Accordingly, the stopper tube 135 can adjust the distance from the moving block by the coupling part screwed with the annular female screw part of the second vertical band according to the size or condition of the outer cover of the sleeve contact ring. It is possible to control the enlargement of the outer diameter by widening a gap formed in the cutout formed in the sleeve contact ring, and to prevent deformation of the sleeve contact ring.

As shown in FIGS. 3A, 3B, 4A, 4B and 5, the locking part 140 is inserted into the cutout 13a formed in the sleeve contact ring 13 to be hooked.

The locking part 140 includes a first block 141 provided on the first vertical stand 112 by having a first locking piece 142 in a corner portion corresponding to the moving block 125, and the A second locking piece 144 may be provided at a corner portion corresponding to the first locking piece 142 to include a second block 143 provided in the moving block 125 .

The first locking piece 142 and the second locking piece 144 are locking members formed in the form of thin plates, respectively, on both side corners of the first block 141 and the second block 143 facing each other. , 2 locking pieces 142 and 144 may be provided by a step portion which is machined and recessed on the upper surface of the first and second blocks 141 and 143.

Here, the first and second blocks 141 and 143 are preferably made of a metal material having a hardness of HRC 40 using carbon steel for structure such as SCM4 as a material.

The first and second locking pieces 142 and 144 are provided in left and right pairs in a symmetrical structure at the corners of both sides of the first and second blocks 141 and 143, so that the first and second locking pieces on one side are caused by repetitive detachment of the sleeve contact ring. When the convenience is damaged or deformed, detachment and replacement of the sleeve contact ring can be performed using the first and second locking pieces on the other side.

In addition, the first block 141 and the second block 143 are detachably detachable so as to be replaceable by a plurality of fastening members on each upper surface of the first vertical stand 112 and the second vertical stand 113 . Although illustrated and described as being made of a block body in the form of a rectangular parallelepiped to be assembled, the present invention is not limited thereto.

Accordingly, the operation of separating or mounting the sleeve contact ring of the plunger tip from the outer surface of the header is, as shown in FIG. Fitted by inserting correspondingly into the gap of the incision formed in the sleeve contact ring.

At this time, the gap between the first and second locking pieces is the same as or smaller than the gap size of the cutout.

And, when the operator rotates the operating shaft to be gripped in the forward direction, the movable block screwed with the operating shaft and assembled slidably on the rail of the horizontal stand through the guider is proportional to the rotation amount of the operating shaft. 2 Since it is horizontally moved toward the vertical stand, the second locking piece provided in the moving block is horizontally moved with respect to the first locking piece of the first block that is fixed in position, so that the gap between the first and second locking pieces is widened. The gap of the incision is widened.

In this case, since the inner diameter of the sleeve contact ring is enlarged as the gap of the cutout is widened, the operation of separating the sleeve contact ring with the enlarged inner diameter from the outer surface of the header and mounting the sleeve contact ring on the outer surface of the header can be performed. .

In addition, the operation of expanding the inner diameter of the sleeve contact ring by widening the gap of the cutout by the forward rotation operation of the operating shaft is the end of the stopper tube in which the moving block having the second block is fixed to one side of the second vertical stand. Since it can be performed when in contact with the , even an unskilled person put into the field can perform the task of detaching and replacing the sleeve contact ring without damage or deformation of the sleeve contact ring.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

10 : Plunger tip
10a: plunger
11: header
13: sleeve contact ring
13a: incision
110: body part
111: horizontal band 112: first vertical band
113: 2nd vertical band
120: moving part
121: rail 122: guider
125: moving block 126: second female thread hole
130: operation part
131: operating shaft 135: stopper tube
136: first female screw hole
140: locking part
141: first block 142: first jamming piece
143: second block 144: second jamming piece

Claims (5)

A device for replacing a sleeve contact ring provided in a plunger tip that reciprocates along the inside of a hollow sleeve filled with molten metal and in contact with the hollow sleeve,
A body portion provided with a first vertical rod and a second vertical rod extending vertically to a predetermined height at both ends of the horizontal rod and fixedly installed on the floor surface;
a moving unit having a rail fixedly installed on the upper surface of the horizontal stand and a guider assembled to be slidably movable, and having a moving block coupled to the guider to reciprocate between the first vertical stand and the second vertical stand;
An operation unit having an operation shaft of a certain length screwed to the first female screw hole formed through the second vertical bar and screwed to the second female screw hole formed in the movable block to reciprocate the movable block by rotation of the operation shaft. ; and
A first locking piece is provided in a corner portion corresponding to the moving block, a first block is provided on the first vertical stand, and a second locking piece is provided in a corner portion corresponding to the first locking piece, so that the moving block Including; including;
Replacing the sleeve contact ring of a plunger for a die-casting casting machine, characterized in that the sleeve contact ring is detached from the header by widening a gap between the first and second locking pieces fitted in the cutout by rotating the operating shaft Device. According to claim 1,
The actuating unit includes a stopper tube of a certain length having the other end fixed to one side of the second vertical bar so that the front end faces and corresponds to the moving block at a predetermined distance and the actuating shaft is disposed in the inner hole. Sleeve contact ring replacement device of plunger for die casting casting machine. 3. The method of claim 2,
The stopper tube is provided with a fastening part screwed to the annular annular female threaded part formed on one side of the second upright bar at an end facing the second upright bar so as to adjust the distance formed between the moving block and the moving block. A sleeve contact ring replacement device of the plunger for a die-casting casting machine, characterized in that. 4. The method of claim 2 or 3,
A sleeve contact ring replacement device for a plunger for a die-casting casting machine, characterized in that it includes at least one sensor member for generating a detection signal upon contact with the moving block at a tip of the stopper tube facing the moving block. 4. The method according to any one of claims 1 to 3,
The first block and the second block are detachably assembled by a plurality of fastening members on respective upper surfaces of the first and second vertical bars, or are integrally formed on each upper end of the first and second vertical bars. A sleeve contact ring replacement device of the plunger for a die-casting casting machine, characterized in that.

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