KR101395314B1 - Fixing apparatus of mold box for casting - Google Patents

Abstract

The present invention relates to a fixing apparatus which fixes an upper mold box and a lower mold box constituting a casting mold box using molding sand, and which fixes a fixing bar which is protruded from one side of an upper mold box and a fixing bar which is protruded from one side of a lower mold box to prevent upper and lower molds in the mold box from being damaged. More particularly, the present invention relates to a fixing apparatus which may stably fix the upper mold box and the lower mold box till molten metal material is set even though exterior surfaces of the upper mold box and the lower mold box are seated and fixed in a misaligned state. A fixing process of the upper mold box and the lower mold box can be rapidly performed. The fixing bars formed in the upper and the lower mold boxes which are misaligned in a horizontal direction may be fixed without a movement in all direction. A slider is moved to a point in which the fixing bar formed in the upper mold box and the fixing bar formed in the lower mold box are located to couple the fixing bars to an upper supporting frame or a lower supporting frame.

Description

[0001] The present invention relates to a fixing apparatus for a mold box,

The present invention relates to a fixing device for fixing an upper mold box and a lower mold box to each other, which constitutes a casting mold box using casting sand, and includes a fixing bar and a lower mold box protruding from the side of the upper mold box, The present invention relates to a fixing device for fixing upper and lower molds provided in a mold box to each other by fixing a fixing bar projected to a side of the mold box, The present invention relates to a casting box fixing apparatus for casting which can stably fix an upper mold box and a lower mold box which are misaligned until the molten metal poured into the mold is hardened even when the mold box is seated in a misaligned state.

3 (a) or 3 (b), the upper mold 80a 'and the lower mold 80b' are fixed to each other by a mold embedded in the upper mold 80a ' Since the mold cavity can be formed by the female and male projections 83 'respectively formed in the molds inside the mold 80b' so that the complete mold of the cast product can be formed, The separation line 82 'is not aligned in the vertical direction between the upper and lower mold halves 80a' and 80b 'as shown in FIG. 3 (a) The upper and lower mold halves 80a 'and 80b' are horizontally misaligned and fixed as shown in FIG. 3 (b).

The fixing bar 81 'provided on the upper mold box 80a' which is seated on the upper portion of the lower mold box 80b 'in the horizontal direction as described above is fixed to the lower mold box 80b' It can not maintain a straight line in the vertical direction with respect to the bar 81 'and is maintained in a misaligned state.

In addition, the conventional casting box fixing apparatus for casting has a support bar 10 ', 20' fastened to a certain part of both ends of the screw bar 41 ', and a screw bar 41' 2, the upper support bar 10 'has a plurality of projections (not shown) projecting to the side of the upper mold box 80a' by tightening the nut 90 'fitted to one end of the screw bar 41' The lower end stopper 20 'is inserted into the other end of the nut bar 41' and is moved downward by a moving force of the fixed nut 90 ' And presses (presses up) the plurality of fixing bars 81 'protruding from the side of the mold box 80b' in an upward direction.

Further, since the pair of support bars 10 'and 20' are not fixed to each other, the nut 90 'fitted to one end of the screw 41' is tightened The upper support bar 10 'and the lower support bar 20' are not linearly aligned in the vertical direction as shown in FIG. 4 (a), but are tightened in the vertical direction in a staggered state as shown in FIG. 4 (b) The fixing bars 81 'by the pair of supporting bars 10', 20 ' There was a problem that the fixing force was weak.

The following is a typical prior art for casting mold box fastening devices.

Korean Patent Laid-Open Publication No. 10-1998-053208 relates to a clamp structure of a mold for a vacuum mold for fixing a mold of an upper and a lower mold used in a vacuum mold, wherein the upper and lower molds A vacuum mold comprising: a plurality of fixing bars each having a predetermined length passing through the upper and the lower base plate such that the upper and the lower base plate are perpendicular to each other, The upper and lower mold vacuum molds (the upper mold box and the lower mold box of the present invention and the upper mold box and the upper mold box of the present invention, respectively) (Corresponding to the lower mold box) are staggered in the vertical direction, there arises a problem that the clamping force of the molds of the upper and lower mold vacuum molds is weakened by the clamp, It is necessary to continuously research and solve the problem.

The present invention relates to a conventional casting mold clamping apparatus for casting a conventional casting mold comprising a screw bar provided with an external thread and a support bar fastened to a certain part of both ends of the screw, The box fastening device is constructed by simply pushing down the fixing bar provided in the upper mold box with the fastening force by tightening the nut fitted to the screw bar and lifting the fastening bar provided in the lower mold box upward, The clamping force of the screw is not transmitted to the fixing bar located at each of the support bars, so that the upper and lower mold halves are firmly fixed to each other. And the main purpose is to provide a solution point All.

The present invention has been made to solve the above-

An upper support positioned to press down the upper portions of the plurality of fixing bars protruding from the side of the upper mold box; A lower support which is positioned by pushing the lower part of the plurality of fixing bars protruding to the side of the lower mold box upward; And a lower part of the lower part is fixed to both ends of the upper part of the upper part so that the lower parts of the lower part are connected to each other so that the lower part can be moved up and down; And a pair of screws at one end of the pair of screws having opposite male threads are fixedly connected to the respective centers of the upper and lower supports, A turnbuckle which is received in both of the nut portions of the tightening lever; A plurality of sliders fastened to the upper and lower supports of the upper and lower supports to be able to move horizontally so as to form a clamp between the fixing bar and the upper support of the upper mold box and the clamping bar between the lower mold and the lower support, The present invention also provides a casting box fastening device for casting.

The casting box fixing apparatus for casting according to the present invention as described above pulls the upper support and the lower support simultaneously by using a pair of screw bars and a buckle composed of a tightening lever located at the center of the sheave, It is possible to obtain an effect that the fastening operation of the upper mold box and the lower mold box can be carried out quickly, because the fastening bars respectively provided in the mold box can be tightened;

Since the upper support is fixed by the side support and the lower support is fixed to the side support in the horizontal direction and movable in the vertical direction, The fixed bar can be fixed in all directions without shaking;

Since the slider is horizontally movable on the lower portion of the upper support and the upper portion of the lower support, respectively, the slider is moved to a position where the fixed bar of the upper mold box or the lower bar of the lower mold box is located, It is possible to obtain an effect that the upper support or lower support can be firmly fastened.

Brief Description of the Drawings Fig. 1 is a perspective view showing a casting box fixing apparatus for casting according to the prior art. Fig.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a casting box,
3 is a side view showing a casting mold box fixing apparatus according to the prior art.
4 is a plan view showing a casting mold box fixing apparatus according to the prior art.
5 is a perspective view showing a casting box fixing apparatus for casting according to a preferred embodiment of the present invention.
FIG. 6 is a perspective view showing a fastening state between a casting box fixing device for casting and a mold box according to a preferred embodiment of the present invention. FIG.
FIG. 7 is an exploded perspective view showing a mold box fixing apparatus for casting according to a preferred embodiment of the present invention; FIG.
8 is a partial cross-sectional perspective view of a casting mold box fixing apparatus for casting according to a preferred embodiment of the present invention.
9 is a partial cross-sectional perspective view illustrating vertical movement of a lower support of a casting mold box fixing apparatus according to a preferred embodiment of the present invention.
10 is a partial cross-sectional perspective view showing the horizontal movement of the slider of the casting mold box fixing apparatus according to the preferred embodiment of the present invention.
11 is a side view showing a tightening sequence of a casting box fixing apparatus for casting and a casting box according to a preferred embodiment of the present invention.

The present invention relates to a fixing device for mutually fixing an upper mold box 80a and a lower mold box 80b constituting a casting mold box using casting sand, An upper support (10) which is positioned by pushing down the upper part of the plurality of protruding fixing bars (81); A lower support 20 which is positioned by pushing the lower part of the plurality of fixing bars 81 protruding to the side of the lower mold 80b upward; The upper and lower ends of the upper and lower supports 20 and 20 are fixed to the opposite ends of the upper and lower supports 10 and 20, A side support (30) supporting the support A pair of screw portions 41 having a male screw 41 having opposite male screw portions are fixedly fastened to respective predetermined portions of the upper and lower supports 10 and 20, A turnbuckle 40 in which a predetermined end portion of the other end of the pair of threaded fasteners 41 is received and fastened to both the nut portions 43 of the tightening lever 42; The upper and lower support frames 10 and 20 are horizontally movably connected to the upper and lower support frames 10 and 20 so that the upper and lower support boxes 10 and 80 are press- And a plurality of sliders (50) for forming a clamping connection between the fixing bar (81) of the upper mold (80b) and the lower support (20).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

First, the mold box of the present invention is constituted of an upper mold box 80a and a lower mold box 80b as shown in FIG. 6 as a general configuration used for producing a cast product. At this time, the upper mold box 80a forms a parting line 82 which is a junction part of the mold box and is seated on the upper part of the lower mold box 80b.

In addition, the upper and lower mold halves 80a and 80b are formed only with side walls and have a plurality of fixed bars (hereinafter, referred to as " sides " 81, and the fixing bar 81 may be provided on all sides of the four sides depending on the size of the mold box or only on a pair of symmetrical sides.

The mold box according to the present invention can be used in general, and a detailed description thereof will be given below with reference to FIG. 6 in which a pair of fixing bars 81 are provided on one side and the other side, respectively, A pair of fixing bars 81 provided at one side will be mainly described.

Specifically, the upper support 10 presses down the upper portions of the plurality of fixing bars 81 protruding to the side of the upper mold box 80a, and the lower support 20 presses the lower mold box 80b The upper and lower mold halves 80a and 80b are pressed downward by the tightening force of the turnbuckle 40, To the fixing bar 81 in the direction of the separation line 82 of the mold box.

That is, as shown in FIG. 6, the upper support 10 has a length sufficient to cover a plurality of fixing bars 81 provided on either side of the upper mold 80a, So as not to be deformed by the pressing force applied when the pressing member 81 is pressed downward.

6, the lower support 20 includes a plurality of fixing bars 81 provided on either side of the lower mold box 80b corresponding to one side of the upper mold box 80a, And has a strength not to be deformed by a pressing force applied when the plurality of fixing bars 81 are lifted upward, and preferably has the same shape as that of the upper support table 10 And are configured to be symmetrical with respect to each other with respect to the dividing line 82 as a center.

In addition, the side support rods 30 are composed of a pair of upper and lower fixed rods fixed to both ends of the upper support rods 10 and the lower ends of the lower rods 20 are fastened to each other, The upper support platform 10 and the lower support platform 20 are prevented from staggering in the vertical direction when the tightening force of the turnbuckle 40 is applied to the upper support platform 10 and the lower support platform 20 So that it can be vertically moved without shaking when moving in the vertical direction.

6, the side support 30 is formed to have a length exceeding the interval between the fixing bar 81 provided in the upper mold box 80a and the fixing bar 81 provided in the lower mold box 80b The upper support 10 fixed to the upper portion of the side support 30 can support the lower portion of the fixed bar 81 provided in the upper portion of the upper mold box 80a, The lower support 20 supported so as to be able to lift up the fixing bar 81 provided in the lower mold box 80b upward.

At this time, the lower end of the side support 30 extends to a position lower than the fixing bar 81 provided in the lower mold 80b, and is vertically movable to a predetermined lower portion of the side support 30 It is preferable that the supported lower support 20 is configured so as not to be detached from the lower end of the side support 30 before pushing and pushing the fixing bar 81 provided in the lower mold box 80b.

A predetermined portion of the pair of side supports 30 is fastened to both ends of the upper support 10. The lower portion of the upper portion of the upper support 10 is perpendicular to the upper support 10, So that it can be formed downward. The fixing of the upper support 10 and the side support 30 may be performed by any one of various methods such as fixing using a coupling (not shown) such as a bolt and a nut, fixing using a welding method, Can be adopted.

" 형태로 구성되고 내측에 하부지지대(20)의 말단이 인입된 상태로 수직이동 가능하도록 구성되는 것이 바람직하다.In addition, the lower portion of the pair of side supports 30 may have any shape as long as both ends of the lower support 20 are coupled to each other to support the lower support 20 so as to be movable up and down. 7,

Quot; shape and is configured to be vertically movable in a state in which the distal end of the lower support 20 is drawn inward.

" 형태로 구성된 측부지지대(30) 어느 한쪽 이상의 측부에는 수직방향(측부지지대(30)의 길이방향)으로 형성된 수직절개홈(31)이 구비되고, 상기 수직절개홈(31)에 대응되는 하부지지대(20)의 말단 일정부분에는 일정부분이 수직절개홈(31)에 끼워진 상태로 이동할 수 있는 돌출부(21)가 구비될 수 있다.
At this time, "

(Vertical direction of the side support 30) is provided on at least one of the side portions of the side support 30 having the vertical cutout groove 31. The vertical cutout groove 31 is formed in a vertical direction A protruding portion 21 can be provided at a certain end portion of the main body 20 so as to be able to move in a state where a certain portion is fitted in the vertical cutout groove 31.

The turnbuckle 40 is provided with a pair of nibs 41 having a male thread 41 in the opposite direction to each other at a certain position corresponding to the center of the upper and lower supports 10 and 20, And the other end portions of the other ends of the pair of fasteners 41 are received and fastened to both the nut portions 43 of the fastening lever 42. The upper end of the upper support 10 and the lower end of the lower support 20 The upper support 10 can press down the fixing bar 81 of the upper mold box 80a and the lower support 20 can move the fixing bar 81 of the lower mold box 80b upward So that it can be pushed (lifted).

7 or 8, a certain portion of the other end of the screw bar 41 formed with the left screw is fastened to the nut portion 43 at one side about the tightening lever 42 at the center, And a certain portion of the other end of the screw bar 41 formed with a right screw is fastened to the other nut part 43.

A certain end of one end of one of the screws 41 is fixedly fastened to a certain portion corresponding to the center of the upper support 10 and a certain end of the other end of the screw 41 is fastened to a lower end of the lower support 20, And is fastened to a predetermined portion corresponding to the center of the frame.

At this time, when the turnbuckle 40 is in the unlocked state, the length of the turnbuckle 40 as a whole by the pair of screws 41 and the tightening lever 42 is set to be shorter than the length of the fixed bar 81 of the upper mold box 80a, The upper support frame 10 and the lower support frame 20 may have a length longer than the interval between the fixing bars 81 of the upper mold 80a when the turnbuckle 40 is in the tightening state. And is configured to have a length enough to tighten each of the fixing bars 81 and 81b of the lower mold box 80b.

The plurality of sliders 50 are coupled horizontally to the lower portion of the upper support 10 and the upper portion of the lower support 20 so that the upper portion of the upper support box 10 and the upper portion of the upper support box 10, And the upper support frame 10 is fixed to the upper portion of the fixing bar 81 of the upper mold box 80a by pressing the upper mold box 80a and the lower mold box 80b, A pressing force is applied to the fixing bar 81 of the upper mold 80a when the lower support 20 is pressed downward and a pressing force is applied to the fixing bar 81 of the upper mold 80a when the lower support 20 lifts the lower portion of the fixing bar 81 of the lower upper, And a pressing force is applied to the fixing bar 81 of the box 80b.

11, when the upper support 10 is positioned on the upper portion of the fixing bar 81 of the upper mold box 80a, the slider 50, which is horizontally movably coupled to the lower portion of the upper support box 10, The lower part is seated on the upper part of the fixing bar 81 so that the upper supporting part 10 can be pressed tightly on the fixing bar 81. [

" 형태로 구성되어 내부공간에 복수 개의 슬라이더(50)를 구비시킬 수 있고, 중앙부에는 상부지지대(10) 길이방향으로 형성된 장방형의 관통홀(11)이 슬라이더(50)의 개수만큼 구비되며, 관통홀(11)을 관통한 체결구(60)가 슬라이더(50)의 상부 일정부분에 체결되어 슬라이더(50)가 상부지지대(10) 하부의 내부공간에서 수평이동 가능하도록 구성되는 것이 바람직하다.The upper support 10 and the slider 50 are fastened to each other such that the slider 50 is horizontally movable at a predetermined position corresponding to the lower portion of the upper support 10, The upper support 10 may have any shape as long as the upper portion of the slider 50 can be tightly fixed to the upper support 10 at the time of tightening down

A plurality of sliders 50 can be provided in the inner space and a rectangular through hole 11 formed in the longitudinal direction of the upper support 10 is provided at the center of the slider 50 as much as the number of the sliders 50, It is preferable that a fastener 60 penetrating the hole 11 is fastened to a predetermined upper portion of the slider 50 so that the slider 50 can be horizontally moved in the inner space under the upper support 10.

" 형태의 상부지지대(10)의 내부공간에 내입되는 슬라이더(50)는 상부지지대(10)와 동일한 "

" 형태로 구성되되, 중앙부가 상부지지대(10)의 중앙부보다는 작은 크기를 갖아 상부지지대(10)의 내부공간에 내입될 수 있고, 중앙부의 양쪽에서 하방으로 길이 연장된 한 쌍의 측면부는 상부지지대(10)의 측면부보다는 긴 높이를 형성하여 도 11과 같이 상부지지대(10)의 내부공간 외측으로 돌출되어 고정바(81)의 상부에 안착될 수 있도록 구성되는 것이 바람직하다.Specifically, the "

The slider 50 which is inserted into the inner space of the upper support 10 of the "

The center portion of which is smaller than the central portion of the upper support 10 and can be inserted into the inner space of the upper support 10 and a pair of side portions extending downward from both sides of the central portion, It may be formed to have a longer height than the side surface of the fixing bar 10 and be protruded outside the inner space of the upper support 10 as shown in FIG.

The through holes 11 provided at the center of the upper support 10 are formed in the shape of a rectangle in the longitudinal direction of the upper support 10 so that a predetermined height So that the fastener 60 protruded from the upper support 10 can be horizontally moved while being engaged with the upper surface of the upper support 10.

8, the fastening tool 60 is formed in the form of a bolt having a head 61 having a diameter larger than that of the through hole 11 and a body 62 having a diameter smaller than that of the through hole 11, The head 62 penetrates through the through hole 11 in the upper direction of the upper support 10 and then is fastened to a central portion of the upper portion of the slider 50. The head 61 is engaged with the through hole 11 It is preferable that the upper surface of the upper support 10 is horizontally movable.

7, the number of the sliders 50 fastened to the lower portion of the upper support 10 so as to be movable horizontally is the same as the number of the fixing bars 81 provided on either side of the upper mold 80a It is preferable that one of the sliders 50 is configured to correspond to one of the fixed bars 81. More preferably, the fixed bars 81 are positioned on both sides of the screw bar 41 of the turnbuckle 40, And one slider 50 can be positioned at a position where the fixing bar 81 is positioned.

" 형태의 상부지지대(10) 형태와 동일하게 구성되되, 상기 상부지지대(10)와 수평 대칭되는 "

" 형태로 구성되어 내부공간에 복수 개의 슬라이더(50)를 구비시킬 수 있고, 중앙부에는 하부지지대(20) 길이방향으로 형성된 장방형의 관통홀(11)이 슬라이더(50)의 개수만큼 구비되며, 관통홀(11)을 관통한 체결구(60)가 슬라이더(50)의 하부 일정부분에 체결되어 슬라이더(50)가 하부지지대(20) 상부의 내부공간에서 수평이동 가능하도록 구성되는 것이 바람직하다.The engagement between the lower support 20 and the slider 50 is also engaged by the turnbuckle 40 so that the slider 50 can move horizontally at a predetermined position corresponding to the upper portion of the lower support 20, The lower support 20 may have any shape as long as the lower portion of the slider 50 can be closely fixed to the lower support 20 when the lower support 20 is tightened upward,

Quot; shaped < / RTI > of the upper support 10,

A plurality of sliders 50 can be provided in the inner space and a rectangular through hole 11 formed in the longitudinal direction of the lower support 20 is provided at the center as much as the number of the sliders 50, It is preferable that a fastener 60 penetrating through the hole 11 is fastened to a predetermined lower portion of the slider 50 so that the slider 50 is horizontally movable in the inner space above the lower support 20.

A detailed description of the constitution of the lower support 20 and the slider 50 and the connection between the lower support 20 and the slider 50 will be omitted from the description of the structure of the upper support 10 and the slider 50, And the slider 50, as shown in FIG.

The slider 50 is horizontally movable on the upper support 10 and the lower support 20 so that the upper and lower molds 80a and 80b are horizontally movable The fixing bar 81 provided in the upper mold box 80a and the fixing bar 81 provided in the lower mold box 80b can not maintain a straight line in the vertical direction and are displaced The slider 50 is moved to the position where the fixing bar 81 provided on the upper mold box 80a or the lower mold box 80b is positioned, The upper support 10 or the lower support 20 can be firmly fastened to each other.

" 형태의 상부지지대(10) 또는 "

" 형태의 하부지지대(20)의 내부공간에 내입될 수 있는 형태로 구성되는 경우에는 슬라이더(50)의 고정바(81)와 대응되는 일정부분인 한 쌍의 측면부 말단이 고정바(81)의 외주 형태 일정부분과 대응되는 형태와 동일한 형태의 요철이 수평방향으로 복수 개 반복된 요철부(51)로 구성되는 것이 바람직하다.A certain portion of the slider 50 corresponding to the stationary bar 81 may be formed in any form as long as it is formed in a shape that can be secured with a certain fastening force in correspondence with the stationary bar 81, (50) is "

Shaped top support 10 or "

A pair of side ends corresponding to the fixed bar 81 of the slider 50 may be inserted into the inner space of the lower bar 20 of the fixing bar 81. In this case, It is preferable that the concavities and convexities of the same shape as the predetermined shape of the outer circumferential shape and the concave and convex portions 51 of the same shape repeated a plurality of times in the horizontal direction are preferable.

That is, the plurality of concavities and convexities of the above-described configuration are associated with the outer shape of the fixed bar 81 to induce the tight coupling between the slider 50 and the fixed bar 81, The shifted slider 50 is fitted to the outer periphery of the fixing bar 81 and is seated to stop the horizontal movement.

11, the fixing bar 81 is configured to have a circular outer shape, and the slider 50 has a concave / convex portion 51 corresponding to the fixing bar 81 A plurality of arc-shaped concavities and convexities corresponding to the circular outer circumferential shape of the fixing bar 81 are repeated in the horizontal direction so that the slider 50 horizontally moved to the position of the fixing bar 81 is positioned on the outer periphery of the fixing bar 81 It is possible to obtain an effect that the horizontal movement can be stopped more easily.

11 (a) to 11 (b), after the worker places the slider 50 provided on the upper support 10 first in the fixing bar 81 of the upper mold 80a, The slider 50 provided on the lower support 20 is vertically moved upward and the slider 50 provided on the lower support 20 is moved upward The slider 50, which is moved upward by the rotation of the continuous turnbuckle 40, is formed so that the upper end of the arc-shaped concavity and convexity is in contact with the fixed bar 81 And moves horizontally until the outer circumferential surface of the fixing bar 81 completely coincides with the concavo-convex shape of the arc shape along the outer circumferential surface, and is tightly pressed and fastened to the fixing bar 81.

The work procedure for fixing the upper fixing box seated on the upper portion of the lower mold box 80b using the casting mold box fixing apparatus according to the present invention will be described with reference to FIG.

First, the upper mold box 80a, which is formed on the upper part of the lower mold box 80b by forming the dividing line 82, is in a state of being displaced in the horizontal direction from the lower mold box 80b.

The worker is provided with a pair of sliders 50 provided at the lower portion of the upper support 10 on the upper portion of a pair of fixing bars 81 provided at the upper mold 80a, The slider 50 of the slider 50 is horizontally moved and then the upper support 10 is hooked to the fixing bar 81 of the upper mold box 80a One of the shape irregularities is fitted correspondingly).

Thereafter, the worker rotates the tightening lever 42 of the turnbuckle 40 in a state where the upper support 10 is pressed downward, and the nut 41 is inserted into the nut portions 43 at both ends of the tightening lever 42, . As a result, the lower support 20 moves upward along the forming direction of the vertical cutout 31 of the side support 30 by the upward movement of the screw 41 as shown in FIG. 11 (a). At this time, since the upper support 10 receives the tightening force by the screw 41 connected to the central portion of the upper support 10, the upper support 10 is seated on the upper portion of the fixing bar 81 of the upper mold 80a, It is not.

The worker is provided with a pair of sliders 50 provided on the upper part of the lower support 20 and being attached to each of the lower parts of the pair of fixing bars 81 provided in the lower part box 80b, The tightening lever 42 is continuously rotated until the lower mold box 80b is firmly fastened to complete fixing of the upper mold box 80a and the lower mold box 80b.

At this time, the upper end portion of one of the concave-convex portions of the concave-convex portion 51 formed at the end of the side portion of the slider 50 is attached to the lower portion of the circular fixing bar 81 as shown in Fig. 11 (b) The slider 50 is horizontally moved so that the arc-shaped concavity and convexity completely correspond to the outer periphery of the circular shape of the slider 81.

The pair of sliders 50 corresponding to the pair of fixing bars 81 provided on the lower mold 80b are arranged in a circular outer periphery of the fixing bar 81 in a direction in which arc- Respectively.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10: upper support 11: through hole
20: Lower support 21:
30: side support 31: vertical incision
40: Turnbuckle 41: Nasabah
42: tightening lever 43: nut part
50: slider 51: concave /
60: fastener 61: head
62: body 80a: upper mold box
80b: Lower mold box 81: Fixing bar
82: Separation line 83:

Claims (4)

An upper support 10 which is positioned by pushing down the upper portions of a plurality of fixing bars 81 protruding from the side of the upper mold 80a;
A lower support 20 which is positioned by pushing the lower part of the plurality of fixing bars 81 protruding to the side of the lower mold 80b upward;
The upper and lower ends of the upper and lower supports 20 and 20 are fixed to the opposite ends of the upper and lower supports 10 and 20, A side support (30) supporting the support
A pair of screw portions 41 having a male screw 41 having opposite male screw portions are fixedly fastened to respective predetermined portions of the upper and lower supports 10 and 20, A turnbuckle 40 in which a predetermined end portion of the other end of the pair of threaded fasteners 41 is received and fastened to both the nut portions 43 of the tightening lever 42;
The upper and lower support frames 10 and 20 are horizontally movably connected to the upper and lower support frames 10 and 20 so that the upper and lower support boxes 10 and 80 are press- And a plurality of sliders (50) forming a press-fit between the fixing bar (81) of the upper mold (80b) and the lower support (20).
The method according to claim 1,
The upper support (10)
"

A plurality of sliders 50 can be provided in the inner space and a rectangular through hole 11 formed in the longitudinal direction of the upper support 10 is provided at the center of the slider 50 as much as the number of the sliders 50, A fastener 60 passing through the hole 11 is fastened to a predetermined upper portion of the slider 50 so that the slider 50 is horizontally movable in the inner space under the upper support 10;
The lower support (20)
The upper support 10 is horizontally symmetrical with the "

So that the slider (50) is horizontally movable in the inner space above the lower support (20).
3. The method of claim 2,
The slider (50)
Characterized in that a predetermined portion corresponding to the fixed bar (81) corresponds to a certain portion of the outer circumferential shape of the fixed bar (81), and a concavity and convexity of the same shape is constituted by a plurality of concave- Casting box retainer for casting.
The method of claim 3,
The fixing bar 81 is configured to have a circular outer shape,
Characterized in that the slider (50) is configured such that a plurality of arc-shaped concavities and convexities corresponding to the circular outer circumferential shape of the fixing bar (81) are repeated in the horizontal direction Quiet mold box fasteners.

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