KR20150012381A - Rotary molding apparatus - Google Patents

Abstract

The present invention relates to a rotary casting apparatus with eject pin holding function, which is provided to minimize defects of casted items by controlling the movement of an eject pin during the rotation of a table injecting a molten material of a bucket into a cavity of a mold. The rotary casting apparatus with eject pin holding function comprises: a table; a support supporting the table; a molten material storage bucket which is spaced apart from the upper part of the mold, and has an entrance facing an cavity opening of the mold; a bucket support body including a column unit arranged on an edge area of the upper part of the table, and a bracket having one end connected to the upper end and the other end connected to the bucket; a rotary unit capable of horizontally rotating the table; a lifting unit moving the bucket support body up and down to make the mold and the bucket combined and separated from each other; a rotational unit driving the bucket support body to make the bucket escape from a vertical line on which the mold is arranged; an eject unit including the eject pin forcibly ejecting a molded item from the cavity of the mold; and a holding unit limiting or releasing the movement of the eject pin.

Description

[0001] ROTARY MOLDING APPARATUS [0002]

The present invention relates to a rotary casting apparatus for casting, and more particularly to a rotary casting apparatus capable of restricting or releasing the movement of an eject pin to assist in casting a casting finished product, The present invention relates to a rotary type casting apparatus having an eject pin holding function.

BACKGROUND ART As a technique related to a rotary type casting apparatus in which a bucket containing a molten metal and a mold rotate together to inject the molten metal of the bucket into the mold,

Korean Patent Registration No.10-0456764 (Registered, hereinafter referred to as "prior art") "Rotary casting method and apparatus" is proposed,

The prior art comprises a mold provided with an injection port mounted on the base plate and directed away from the upper surface of the base plate, bearing means for the base plate supported so that the base plate can be rotated 180 degrees around the horizontal rotation axis, A casting vessel having an orifice that can be positioned such that an orifice of the vessel is oriented toward the upper surface of the base plate and a casting vessel having an aperture that can be sealed to a downwardly directed injection port of the mold and rotated 180 degrees or more about a horizontal axis of rotation with the mold And a moving means for the casting container which allows the casting container to be removed from the upwardly directed injection port of the mold at the rotated position.

The applicant of the present invention has developed a rotary casting apparatus which can prevent the eject pin for withdrawing casting from entering the cavity of the mold and interfering with the rotary casting apparatus when the table is rotated.

It is an object of the present invention to provide a rotary casting apparatus capable of preventing an eject pin from being interfered into a cavity of a mold during table rotation.

According to an aspect of the present invention, there is provided a rotary casting apparatus having an eject pin holding function,

table;

A support for supporting the table;

A mold provided in the upper central region of the table and having an upwardly open internal cavity;

A molten metal storage bucket spaced apart from the upper side of the mold and having an inlet face facing the cavity opening of the mold;

A bucket support including a column disposed in the upper edge region of the table and a bracket having one end connected to the upper end of the column and the other end connected to the bucket;

A rotary unit for horizontally rotating the table;

A lifting unit for vertically lifting and lowering the bucket support to couple and separate the mold and the bucket; And

A rotating unit which drives the bucket support so as to move the bucket away from a vertical line with the mold;

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An ejection unit having an ejection pin for forcibly withdrawing the formed molding in a cavity of the mold; and a holding unit for restricting or releasing movement of the ejection pin,

At this time,

A plurality of eject-pins disposed under the table,

A pin coupling plate to which each of the eject pins is coupled,

A first support plate disposed under the pin coupling plate,

A second support plate spaced apart from the lower side of the support plate,

At least two relay rods interconnecting the first and second support plates and connected to the lower portion of the table,

An ejection cylinder mounted on a lower portion of the second support plate, and

An ejection piston connected to the pin-engaging plate through the first and second support plates and adapted to move up and down by the ejection cylinder;

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The holding unit

A support rod which is erected at the edge of the first support plate,

A link whose lower end is hinged to the support rod,

A holder on which an interruption is hinged to the top of the link,

A holding cylinder mounted on a lower portion of the first supporting plate,

A holding piston which is built in the holding cylinder and is hinged to the right end of the holder at an end portion that is exposed through the first supporting plate upwardly,

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And the left end of the holder, which is pivoted with respect to the hinge coupling portion with the link when the holding piston rises by the holding cylinder, supports the upper surface of the pin coupling plate.

On the other hand,

Four metal powders arranged on the table above in the front, rear, left and right, respectively

And four forward / backward drive means disposed behind the four metal powder powders to forward the four metal powder powders to form the cavity,

.

In the rotary casting apparatus having the eject pin holding function according to the present invention,

It is possible to prevent the ejection pin provided for withdrawing the molded article in the rotation of the table, which is an operation for injecting the molten metal of the bucket into the mold cavity, from entering the cavity of the mold, There is a great effect to be made.

1 is a front view showing a rotary casting apparatus according to the present invention,
Fig. 2 is a plan view of Fig. 1,
3 is a plan view showing a mold,
Figs. 4 to 10 are front structural views showing an operating state of the casting apparatus of Fig. 1,
11 to 12 are schematic views showing the process of moving the molten metal according to the operation of FIG. 10,
13 is a plan view showing an operating state of the bucket support,
Fig. 14 is a front view showing the push unit provided in the bucket and its operating state,
Fig. 15 is a front structural view showing the bucket fixed position guiding unit provided in the bucket and the mold and its operating state,
16 is a front structural view showing an eject unit provided at a lower portion of a table and a holding unit for fixing and releasing the eject pin,
FIG. 17 is a front view showing a state in which the ejection pin movement is released by the holding unit in FIG. 16. FIG.

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

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

1, the direction of the bucket side is designated as the upper side or the upper side, and the side of the mold side is referred to as the lower side or the lower side, and the first support body side on the left side is referred to as the left side or the left side on the basis of FIG. The direction is specified because it is right or wrong.

1 to 17, in a rotary casting apparatus having an eject pin holding function according to the present invention,

A rotary unit 60, an elevation unit 70, and a rotation unit 80. The table 10, the support 20, the mold 30, the bucket 40, the bucket support 50,

Looking at each configuration,

The table (10)

As shown in Figs. 1 and 2,

And has a substantially rectangular horizontal plate shape.

The support (20)

As shown in Figs. 1 and 2,

To support the table 20,

First and second support bodies 21 and 22 disposed on the right and left sides of the table 20,

A first support shaft 23 interconnecting the first support body 21 and the table 20,

A second support shaft 24 interconnecting the second support body 21 and the table 20,

.

At this time, the first and second support shafts 23 and 24 are arranged on the same line.

The mold 30

As shown in Figs. 1 to 3,

And is provided in a central region above the table 10 to make a casting,

Four metal mold powders 31 arranged on the table 10 in front, back, right and left, respectively, and

Four forward and backward driving means 32 disposed behind the four metal powder powders 31 for forwarding the four metal powder powders,

.

11, an upper opening (opening) is formed in the inner space surrounded by four metal mold powders 31 advanced by the four forward and backward driving means 32, that is, four metal mold powders 31, Shaped cavity C is formed.

2 and 3, the four forward and backward driving means 32 includes a four-

A pneumatic or hydraulic cylinder 321 disposed at the rear of the mold powder 31 and fixed to the table 10 and an end portion embedded in the advance and retreat cylinder 321 are connected to the mold powder 31 And a retractable piston 322 connected thereto.

Therefore, the mold powder 31 is interlocked with the advance / retreat piston 322 which is moved forward or backward by the advance / retreat cylinder 321.

The bucket (40)

As shown in Figs. 1 and 13 to 15,

The molten metal to be injected into the cavity (C) of the mold (30) is accommodated in a space above the mold (30)

And a rectangular container structure in which the mouth faces the opening of the cavity (C) of the mold (30).

The bucket support (50)

As shown in Figs. 1 and 13 to 15,

For supporting the bucket 40,

A column portion 51 disposed in the upper edge region of the table 10, and

A bracket 52 having one end connected to the upper end of the column 51 and the other end connected to the bucket 40,

.

The rotary unit (60)

As shown in Figs. 1 and 2,

To rotate the table 10 horizontally,

The first and second support shafts 23 and 24 are rotatably coupled to the first and second support bodies 21 and 22 of the support 20, , 62),

A driven gear 63 axially coupled to the second support shaft 24 exposed to the outside through the second shaft engaging portion 62,

A rotary drive motor 65 having a drive gear 64 meshed with the driven gear 63,

.

Therefore, the table 10 rotates the first and second support shafts 23 and 24 by the rotation of the drive gear 64 and the driven gear 63 engaged with the drive gear 64 by the rotary drive motor 64, The clockwise or counterclockwise rotation operation is performed.

The elevating unit 70

As shown in Figure 1,

To vertically move the bucket support (50) up and down to couple and separate the mold (30) and the bucket (40)

A pneumatic or hydraulic elevating cylinder 71 fixed to the table 10 and having a middle portion of the column 51 of the bucket support 50 built therein,

.

At this time, since the column portion 51 functions as a piston, the column portion 51 can be vertically raised or lowered vertically by a pneumatic or hydraulic pressure selectively supplied into the elevating cylinder 71.

A circular flange is provided at the lower end of the column portion 51. Two limit switches for checking the vertical moving distance of the circular flange are provided. It may be implemented to control the operation of the cylinder 71.

Therefore, when the column 51 is lowered by the elevation unit 70, the bucket 40 and the mold 30 come into contact with each other, and when the column 51 rises, will be.

The rotation unit 80

As shown in Fig. 13,

The bucket support (50) is driven to deviate from the vertical line of the bucket (40) with the mold (30)

A pivotal bracket 81 axially coupled to the lower end of the pillar 51 of the bucket support body 50,

A pivoting piston 82 hinged to the pivoting bracket 81 at a position eccentric from the pivoting portion 51, and

A pneumatic or hydraulic pivoting cylinder (83) having the pivoting piston (82) built therein and hinged to the table (10)

.

Accordingly, the pivoting piston 83 is advanced or retreated by the pivoting cylinder 83. At this time, the pivoting bracket 81 is rotated in the counterclockwise direction during the backward movement, and the pivoting cylinder 82 83, the bucket 40 is rotated in the clockwise direction with respect to the hinge joint portion with the table 10, so that the bucket 40 is disengaged from the mold 30.

On the other hand, the rotary casting apparatus according to the present invention further includes a push unit 90,

The push unit (90)

As shown in Fig. 14,

To improve the airtightness between the mold (30) and the bucket (40) by pressing the bucket (40) to the mold (30) side from the mold (30) and the bucket (40)

A bottom plate 91 disposed on the upper side of the bucket 40,

Four vertical rods 92 having a flange 921 passing through four corner areas of the bottom plate 91 and connected to the upper surface of the bucket 40 and supported on the upper surface of the bottom plate 91,

A top plate 93 through which the four vertical rods 92 penetrate and is disposed at the top of the four vertical rods 92,

Four elastic springs 94 coupled to each of the four vertical rods 92 so as to be interposed between the top and bottom plates 93 and 91,

A coupling means 95 for interconnecting the top and bottom 93 and the other end of the bracket 52 with the other end of the bracket 52 disposed between the top and bottom plates 93 and 91,

.

Wherein said coupling means (95)

Two or more guide pins 951 penetrating the top plate 93 and the bracket 52 vertically and a head penetrating upward from the bottom of the bottom plate 91 to support the head under the bottom plate 91, And two or more bolts 952 fastened to the respective guide pins 951.

A bushing may be interposed between the bottom plate 91 and the four vertical rods 92, the top plate 93 and the four vertical rods 92 to minimize friction.

Therefore, when the bucket 40 is lowered by a certain distance in a state where the bucket 40 is in contact with the mold 30 when the bucket support 50 is lowered by the elevation unit 70, the bracket 52 of the bucket support 50 And the top plate 93 connected thereto are lowered together along the guide pins 951 of the coupling means 95 so that the four elastic springs 94 are compressed so that the buckets 40 are pressed toward the mold 30, so that the airtightness between the two is further improved.

On the other hand, the rotary casting apparatus according to the present invention further includes a bucket fixed position guiding unit 100,

The bucket fixed position guiding unit (100)

As shown in Fig. 15,

When the bucket 40 is moved toward the mold 30 by the lifting unit 70, the bucket 40 is guided to be disposed at a predetermined position in the mold 30,

A vertical pin 101 provided on one side or both side outer walls of the bucket 40,

A pin insertion hole 102 formed in the mold 30 to insert the vertical pin 101,

.

At this time, it is preferable that the end of the vertical pin 101 has a sharp shape, so that it can be easily inserted into the pin insertion hole 102 for the first time.

The rotary casting apparatus according to the present invention further includes a demoulding unit 110 for demolding a cast formed in the cavity C of the mold 30,

The eject unit 110

As shown in Figs. 16 and 17,

For casting a casting completed in a cavity (C) of the mold (30)

A plurality of eject-pins 111 disposed below the table 10 to allow the mold 30 to protrude into and out of the cavity C,

A pin coupling plate 112 to which the eject pins 111 are coupled,

A first support plate 113 disposed below the pin coupling plate 112,

A second support plate 114 spaced apart from the lower side of the first support plate 113,

Two or more relay rods 115 interconnecting the first and second support plates 113 and 114 and connected to the lower portion of the table 10,

A pneumatic or hydraulic ejection cylinder 116 mounted under the second support plate 114,

An ejection piston 117 connected to the pin engagement plate 112 through the first and second support plates 113 and 114 and adapted to move up and down by the ejection cylinder 116,

.

When the ejection cylinder 116 is moved forward (that is, upward) by the ejection piston 117, the pin-engaging plate 112 is lifted and each ejection pin 111 coupled to the ejection cylinder moves to the mold 30, The casting formed in the cavity C of the cavity C is drawn upward.

When the table 10 is rotated by the rotary unit 60 so that the bucket 40 is positioned on the lower side of the table 10, the eject unit 110 is positioned on the upper side of the table 10 The respective eject pins 111 can be lowered by their own weight together with the pin coupling plate 112 connected thereto and the lowered eject pins 111 enter the cavity C of the mold 30 So that it is possible to cause defects in the casting during casting,

The present invention further includes a holding unit 120 for limiting or releasing the movement of each eject pin 111,

The holding unit (120)

As shown in Figs. 16 and 17,

A support rod 121 installed at the edge of the first support plate 113,

A link 122 hinged to a lower end of the support rod 121,

A holder 123 hingedly coupled to the upper end of the link 122,

A pneumatic or hydraulic holding cylinder 124 mounted below the first support plate 113, and

A holding piston 125 which is embedded in the holding cylinder 124 and is hinged to the right end of the holder 123 at an end exposed through the first supporting plate 113,

.

The holder 123 may have a predetermined length so that the left end of the holder 123 is hooked on the upper surface of the pin coupling plate 112 in a horizontal state.

The holding unit 120 may include two or four holding units 120. When two holding units 120 are provided, the holding unit 120 may be disposed on both outer sides of the pin coupling plate 112, And can be respectively disposed on four sides.

And a protrusion 123a protruding downward from the left end of the holder 123 and having a U-shaped cross section. The holder 123 is stably mounted on the upper surface of the pin coupling plate 112, It is possible to further improve the supporting force with respect to the pin coupling plate 112 through the ridge portion 123a.

Therefore, when the holding piston 125 is lifted by the holding cylinder 124, the holder 123 is moved from the holder 123 rotated with respect to the hinge joint portion with the link 122 to the pin coupling plate 112 Is supported by the upper surface of the pin coupling plate 112.

[0030] In operation of the rotary casting apparatus according to the present invention,

4, each of the mold powders 31 of the mold 30 is advanced by the advancing / retreating drive means 32 to form a cavity C therein,

5, the table 10 is rotated 180 degrees by the rotary unit 60 so that the bucket 40 is positioned on the lower side of the table 10,

6, the molten metal is injected into the bucket 40 from a separate outer container. At this time, the bucket 40 is spaced apart from the mold 30 downward, It is off.

7, when the injection of molten metal is completed, the bucket support body 50 is rotated by the rotation unit 80 so that the bucket 40 is positioned on the vertical line with the mold 30,

8, the bucket support 50 is lifted by the lifting unit 70 so that the bucket 40 and the mold 30 abut against each other, that is, the inlet of the bucket 40, (30) are in contact with each other in correspondence with each other.

The table 10 rotates 180 degrees by the rotary unit 60 so that the bucket 40 is positioned on the upper side of the table 10,

At this time, if the movement of the molten metal during the rotation operation of the table 10 is examined in more detail,

11, when the table 10 rotates while the bucket 40 is positioned below the mold 30 and is in contact with each other,

The positions of the bucket 40 and the mold 30 are changed in the order of [B] and [C] of FIG. 11 and in the order of [ 30, into the cavity (C)

11, the injection of all the molten metal into the cavity C of the mold 30 is completed.

10, the bucket 40 is detached from the mold 30 and the casting is taken out (demolded) by using the eject pin 111 of the eject unit 110. As shown in FIG.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be modified and changed without departing from the scope and spirit of the invention. Such variations and modifications are to be construed as falling within the scope of protection of the present invention.

10: Table
20: Support
21, 22: first and second support bodies
23, 24: first and second support axes
30: Mold
31: mold powder 32: forward / backward driving means
321: Retraction cylinder 322: Retraction piston
40: Bucket
50: Bucket support
51: column portion 52: bracket
60: Rotary unit
61, 62: first and second shaft coupling portions 63: driven gear
64: drive gear 65: rotary drive motor
70: Lift unit
71: lifting cylinder
80: Rotating unit
81: Rotation bracket 82: Rotating piston
83: Rotating cylinder
90: Push unit
91: bottom plate 92: vertical rod
93: Top plate 94: Elastic spring
95: engaging means 951: guide pin
952: Bolt
100: bucket stationary guide unit
101: Vertical pin 102: Pin insertion hole
110: Eject unit
111: eject pin 112: pin coupling plate
113, 114: first and second support plates
115: Relay rod 116: Ejection cylinder
117: Eject piston
120: Holding unit
121: support rod 122: link
123: holder 123a: ridge
124: holding cylinder 125: holding piston

Claims (4)

A table (10);
A support (20) supporting the table (10);
A mold 30 provided in a central region above the table 10 and having an upwardly open internal cavity C;
A molten metal storage bucket 40 which is disposed on the upper side of the mold 30 and faces the entrance of the cavity 30 of the mold 30 so as to face the opening of the cavity 30;
A column portion 51 disposed at the upper edge region of the table 10 and a bracket 52 having one end connected to the upper end of the column portion 51 and the other end connected to the bucket 40 A bucket support (50);
A rotary unit (60) for horizontally rotating the table (10);
A lifting unit (70) for vertically moving up and down the bucket support (50) to couple and separate the mold (30) and the bucket (40); And
A rotating unit (80) for driving the bucket support (50) to move the bucket (40) away from a vertical line with the mold (30);
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An ejection unit 110 having an ejection pin 111 for forcibly withdrawing a molded body formed in a cavity C of the mold 30 and a holding unit 110 for limiting or releasing movement of the ejection pin 111 120) having an eject pin holding function.
The method according to claim 1,
The eject unit 110
A pin coupling plate 112 disposed below the table 10 and coupled with the eject pins 111,
A first support plate 113 disposed below the pin coupling plate 112,
A second support plate 114 spaced apart from the lower side of the first support plate 113,
Two or more relay rods 115 interconnecting the first and second support plates 113 and 114 and connected to the lower portion of the table 10,
An ejection cylinder 116 mounted below the second support plate 114, and
An ejection piston 117 connected to the pin engagement plate 112 through the first and second support plates 113 and 114 and adapted to move up and down by the ejection cylinder 116,
And a rotary casting device having an eject pin holding function.
3. The method of claim 2,
The holding unit (120)
A support rod 121 installed at the edge of the first support plate 113,
A link 122 hinged to a lower end of the support rod 121,
A holder 123 hingedly coupled to the upper end of the link 122,
A holding cylinder 124 mounted below the first support plate 113, and
A holding piston 125 which is embedded in the holding cylinder 124 and is hinged to the right end of the holder 123 at an end exposed through the first supporting plate 113,
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The holder 123 is rotated about the hinge joint portion with the link 122 when the holding piston 125 rises by the holding cylinder 124. The end of the holder 123 adjacent to the pin coupling plate 112, And the upper surface of the pin-engaging plate (112) is supported on the upper surface of the pin-engaging plate (112)
4. The method according to any one of claims 1 to 3,
The mold (30)
Four metal mold powders 31 arranged on the table 10 in front, back, right and left, respectively, and
And four forward and backward driving means (32) arranged behind the four metal powder powders (31) for advancing the four metal powder bodies (31) forward to form the cavity (C) Shaped casting apparatus.

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