JP2018199145A - Non-frame type molding flask - Google Patents

Abstract

To provide a non-frame type molding flask comprising an inside paste plate whose production cost is extremely low as a replacement component without requiring a production labor.SOLUTION: Provided is a non-frame type molding flask in which an upper flask includes four upper flask rectangular inside wall face parts and four upper flask trapezoidal inside wall face parts continuously provided at the upper flask rectangular inside wall face parts, a lower flask includes four lower flask trapezoidal inside wall face parts and four lower flask rectangular inside wall face parts. Each upper flask trapezoidal inside wall part is pasted with a trapezoidal inside paste plate for an upper flask with a uniform thickness, respectively attachably/detachably, each lower flask trapezoidal inside wall face part is pasted with a trapezoidal inside pase plate for a lower flask with a uniform thickness, respectively attachably/detachably, and, in each corner part in the circumferential direction formed by each paste plate, the adjacent inside paste plates are mutually abutted without gaps.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a frameless casting frame in which a model is molded by molding a model with an upper casting frame and a lower casting frame incorporated as part of the molding device in the molding device.

2. Description of the Related Art Conventionally, a molding frame used when a mold is manufactured by a frameless molding apparatus is incorporated in the molding apparatus as a part of the molding apparatus. Therefore, a mold is manufactured by repeatedly using a small number of casting frames. Molding when molding sand is compressed (when squeezing) in molding work where a model is placed in a casting frame and filled with casting sand, and when the mold is extracted from the casting mold with the upper and lower molding frames aligned. Large friction is generated on the mold forming surface of the casting frame.
In the frameless molding apparatus, since the number of incorporated molding frames is small, the same molding frame is used more frequently, and the amount of wear at locations where friction occurs is increased. This wear is uneven wear, which is not uniform but partly biased, and when the amount of wear increases, when the mold is extracted from the casting frame, mold displacement occurs between the upper and lower molds. The mold cast from a worn casting frame has a drum-like outer peripheral surface, and the pressure of the molten metal that has been poured due to a gap between the inner surface of the rectangular jacket (cover frame) used during pouring and the outer wall of the mold As a result, the mold is deformed, resulting in poor product accuracy.

  For this reason, as shown in Patent Document 1, an inner adhesive plate that is separable from the main body of the molded casting frame is provided on the mold forming surface (inner surface) side of the molded casting frame, and wears when the wear amount of the inner adhesive plate increases by use. The internal adhesive plate is replaced to reduce parts replacement costs.

Utility Model Registration No. 3175734

  However, the frameless casting frame of Patent Document 1 employs a taper inner paste plate. For this reason, the upper and lower inner plates have been replacement parts with a high manufacturing cost, which require labor to manufacture the entire surface of one surface.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a frameless casting frame having an inner plate that does not require production labor and is extremely inexpensive to manufacture as a replacement part. It is to be.

  The structural features of the invention according to claim 1 are: an upper casting frame for forming an upper mold that is formed in a rectangular cylinder and superimposed on an upper mold surface plate; and a lower mold that is formed in a rectangular cylinder A frameless casting frame overlaid on a model surface plate for molding a lower mold, wherein the upper casting frame has a rectangular parallelepiped opening space at the upper end of the upper casting frame In order to form four upper casting frame rectangular inner wall surfaces for forming with a predetermined width, and a square trapezoidal shaped molding space that is provided continuously with the upper casting frame rectangular inner wall surface portion and expands downward. A square base that expands downward from the upper end of the lower casting frame when the lower casting frame is overlaid on the lower side of the upper casting frame. Four lower cast frame base inner wall surfaces to form a shape molding space and continuous to the lower cast frame base inner wall surfaces Four lower casting frame rectangular inner wall surface portions for forming a rectangular parallelepiped opening space to the lower end of the lower casting frame, and each upper casting frame trapezoidal inner wall surface portion is formed in a trapezoidal plate shape and uniform A base-shaped inner sticking plate for an upper casting frame with an appropriate thickness is detachably attached to each inner wall surface of the lower casting frame base shape, and is formed into a trapezoidal plate shape on the inner wall surface of the lower casting frame. Each of the corners in the circumferential direction of the molding space formed by the trapezoidal inner sticking plate for the upper and lower casting frames is attached to the inner sticking plate adjacent to each other. They are in contact with each other without a gap.

  According to the invention which concerns on Claim 1, the trapezoidal inner-pasted board for upper and lower casting frames is a board | plate material of the uniform thickness corresponding to the shape of an upper / lower casting frame base-shaped wall surface part. Thereby, the internal sticking board which needed to be replaced by the abrasion by use can be replaced | exchanged at an inexpensive manufacturing cost, without having to process into a taper shape conventionally.

It is a schematic diagram showing an embodiment of a mold making apparatus using the frameless casting frame of the present invention. It is sectional drawing which shows a frameless type casting frame. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is an enlarged view of IV in FIG. 3. FIG. 3 is an enlarged view of V in FIG. 2. FIG. 3 is an enlarged view of VI in FIG. 2. It is an enlarged view of the junction part of the upper end surface of the trapezoidal shaped inner sticking board for lower cast frames, and the lower surface of a match plate. It is sectional drawing which shows the state with which the upper and lower casting_mold | templates were overlaid. It is a figure which shows the process which throws casting sand into an upper casting frame in a frame setting and die cutting station, and the state which the upper casting_mold | template and lower casting_mold | template separated from the match plate waited in the frame matching and frame cutting station. . It is a figure which shows the process of setting the superposition | polymerization casting frame by which casting sand was thrown into the upper casting frame to the inversion apparatus. It is a figure which shows the process of turning upside down the lower casting frame and the upper casting frame. It is a figure which shows the process of throwing casting sand into a lower casting frame. It is a figure which shows the process of moving a squeeze head to a molding station. It is a figure which shows the process of lowering a squeeze head. It is a figure which shows the process of simultaneously squeezing the foundry sand in an upper casting frame and a lower casting frame with a squeeze head. It is a figure which shows the process of raising a squeeze head in a molding station, and the process just before removing from a top and bottom casting frame in a frame alignment and frame extraction station, combining an upper mold and a lower mold. In the molding station, the upper casting frame and the lower casting frame are turned upside down. At the frame alignment / frame removal station, the upper mold and the lower mold removed from the upper and lower casting frames are combined to complete the mold. It is a figure which shows a state. It is a figure which shows the process of isolate | separating an upper casting frame, a match plate, and a lower casting frame in a frame setting and die cutting station. The process of moving the upper and lower casting frames to the frame alignment / frame cutting station, and the process of moving the upper and lower casting frames from which the molds have been extracted to the frame setting / die cutting station to form a polymerization casting frame. FIG. It is a figure which shows another example of a frameless type casting frame. It is a front view of another example of the mold making apparatus using a frameless casting mold. It is a side view of another example of the mold making apparatus using a frameless casting mold.

(Embodiment)
An embodiment of a mold making apparatus using a frameless casting frame according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the mold making apparatus 2 includes a base frame 4, a rectangular frame-shaped top frame 6, and a machine frame 10 that is provided at an end of the base 4 and supports a top frame 6. A molding station mst, a frame setting / die cutting station fst, and a frame aligning / frame cutting station tst, which are supported by the machine frame 10 and arranged in order, are provided. The horizontal direction in which the stations mst, fst, and tst are arranged is defined as the X direction.
The mold making apparatus 2 further includes a shuttle cylinder 86 that moves the foundry sand charging device 26 and the squeeze device 24 along the X direction, and an upper casting frame 19 (first and second upper casting frames 191 and 192). The upper turntable 114 moved between the die cutting station fst and the frame cutting station tst and the lower casting frame 23 (first and second lower casting frames 231 and 232) are set as a frame. The die cutting station fst And a lower turntable 106 that is moved between the frame alignment / frame removal station tst.

(Molding station)
As shown in FIG. 1, the molding station mst includes a reversing device 22 that vertically flips the upper casting frame 19 and the lower casting frame 23 that are put on the match plate 21 and into which the foundry sand MS is put, and the upper casting frame 19 and the lower casting frame mst. A foundry sand loading device 26 for charging the foundry sand MS into the casting frame 23, a squeeze device 24 for squeezing the foundry sand MS charged into the upper casting frame 19 and the lower casting frame 23 into which the foundry sand MS has been charged, and A casting frame lateral movement device 28 for laterally moving a superposed casting frame 20 (see FIG. 2) configured by superposing the upper casting frame 19, the lower casting frame 23, and the match plate 21. When the squeeze device 24 is positioned at the molding station mst, the position between the squeeze device 24 and the reversing device 22 is the molding position msp. The upper surface 21u of the match plate 21 corresponds to the upper mold surface plate with the upper mold model Ma disposed thereon, and the lower surface 21d of the match plate 21 has the lower mold model surface Mb disposed with the lower mold model surface plate. It corresponds to.

(Reversing device)
The reversing device 22 is rotatably supported by a bearing member (not shown) fixed as a set to the lower end of a hanging member (not shown) suspended from both ends of the top frame 6 at a predetermined interval. A pair of rotating shafts 32, a pair of vertical wall portions 34 that are integrally supported by the rotating shafts 32 and have arc edges at the lower portion along the rotation locus, and horizontally below the vertical wall portions 34. A plurality of roller members 36 arranged side by side, and a support plate 38 installed between the vertical wall portions 34 at the upper part of the paired vertical wall portions 34.
An unillustrated external gear is provided around the rotation shaft 32, and a rack (not illustrated) is engaged with the external gear to constitute a pinion rack mechanism. The rack is driven by an air cylinder device (not shown). These rotating shafts 32, external gears, racks, and air cylinder devices constitute a rotating device.
An air cylinder 40 as an advance / retreat device is provided at the center of the support plate 38, and a presser plate 42 is provided at the tip of the air cylinder 40. The presser plate 42 moves in the direction of the opposing roller member 36 as the air cylinder 40 advances. Four guide rods 44 projecting toward the support plate 38 are provided on the upper surface of the presser plate 42. Each guide rod 44 is guided by a guide hole (not shown) drilled in the support plate 38 to move the presser plate 42 closer to and away from the support plate 38 in parallel. The air cylinder 40 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and the air cylinder 40. Upper cast frame support members 50 are attached to the four corners of the presser plate 42. The upper casting frame support member 50 includes a bottomed tubular member 46 having an opening on one side, and a rod member 48 that is fitted into the tubular member 46 and advances and retracts from the opening of the tubular member 46. Yes.
The holding plate 42 is provided with a guide hole (not shown), and a cylindrical member 46 is fixed to the periphery of the guide hole (not shown) at the opening. A flange portion (not shown) is provided around the proximal end portion of the rod member 48, and the forward end of the rod member 48 is restricted by the flange portion coming into contact with the peripheral edge of the guide hole. The cylindrical member 46 accommodates a metal spring (not shown) whose one end is in contact with the bottom surface of the cylindrical member 46, and the other end of the metal spring is in contact with a flange portion provided on the rod member 48. As a result, the rod member 48 is urged in the forward direction. The rod member 48 is slidably guided by the guide hole, and the tip tapered portion (not shown) provided on the rod member 48 is engaged with a tapered hole (not shown) formed at the edge of the upper casting frame 19. Then, when the rod member 48 comes into contact with the edge of the upper casting frame 19, the horizontal positioning of the upper casting frame 19 is performed. A sand presser plate 54 is provided at the center of the lower surface of the presser plate 42, and the sand presser plate 54 is formed in a quadrangular cross section (a square cross section) that can be fitted into the inner periphery of the upper casting frame 19.

  As shown in FIG. 1, a restriction column 53 protrudes from the base 4 below the reversing device 22, and the guide rod of the presser plate 42 when the squeeze device 24 squeezes the upper end of the restriction column 53. Four restricting members 55 are provided so as to be opposed to 44 through a gap. This gap prevents the reversing device 22 from hitting the restricting member 55 when reversing.

(Squeeze device)
The squeeze device 24 includes wheels (not shown) that move on a transport rail (not shown) extending in the X direction on the top surface of the top frame 6 at the lower four corners, and a support frame 60 formed in a three-dimensional rectangular shape. Have. A squeeze cylinder 62 as an elevating device is fixed to the upper center of the support frame 60 with a bolt or the like (not shown) via a mounting bracket 64. The squeeze cylinder 62 includes a piston portion 66 that protrudes downward. A squeeze plate (squeeze member) 68 that fits into the inner periphery of the lower casting frame 23 is provided at the lower end of the piston portion 66 via a holding plate (not shown). Is provided. On both sides of the squeeze cylinder 62, a pair of guides (not shown) are provided that are fixed to the support frame 60 by mounting brackets 64 and extend in the vertical direction. The squeeze cylinder 62 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and the squeeze cylinder 62.

(Casting sand input device)
As shown in FIG. 1, the foundry sand charging device 26 stores the foundry sand MS necessary for mold making at one time as one unit, and comes into contact with the upper surface of either of the upper and lower casting frames 19, 23 to form a molding space. A hopper 74 is provided to put the foundry sand MS into the BS (UBS, DBS) and the open space OS (UOS, DOS). The hopper 74 has a shooter portion 76 that comes into contact with the upper surfaces of the upper and lower casting frames 19, 23, and a plurality of gate plates 80 that vertically partition the inside of the outer peripheral wall 78 are supported on the outer peripheral wall 78 above the shooter portion 76. Has been. Above the gate plate 80 is a sand measuring unit 82 for storing the foundry sand MS. The foundry sand MS is conveyed and stored in the sand weighing unit 82 by a conveyor device (not shown).
The gate plate 80 is rotated around a horizontal axis line by a rotation device (not shown), and when the gate plate 80 is positioned at the horizontal position, the inner center of the outer peripheral wall 78 is partitioned vertically so that the foundry sand MS can be stored. When the gate plate 80 is rotated and positioned in the vertical position, the stored foundry sand MS falls and is put into the molding space BS (UBS, DBS) formed by the upper casting frame 19 or the lower casting frame 23. The The hopper 74 is fixed to a horizontal frame 84 extending from the support frame 60, and the horizontal frame 84 is provided with wheels (not shown) that roll on the transport rail. The hopper 74 and the squeeze device 24 are moved between a molding station mst and a frame setting / die cutting station fst by driving a shuttle cylinder 86 provided at an end of the top frame 6 (right end in FIG. 1). Positioned in position. Shuttle cylinder 86 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and shuttle cylinder 86.

(Casting frame lateral movement device)
As shown in FIG. 1, the form frame lateral movement device 28 includes a pair of guide frames 88 extending in the X direction, and the guide frames 88 are aligned when the roller member 36 of the reversing device 22 is positioned downward. An alignment roller portion 90 is provided that enables it. A clamp carriage 92 that clamps and unclamps the superposed casting frame 20 is provided on the alignment roller portion 90 so as to be horizontally movable. The clamp carriage 92 is driven by a horizontal cylinder 94 provided at one end of the guide frame 88. . The horizontal cylinder 94 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and the horizontal cylinder 94. The clamp carriage 92 is provided with a clamp claw 96 whose base end is supported, and the front end of the clamp claw 96 can be engaged with and disengaged from a locked portion (not shown) of the superposed cast frame 20 (lower cast frame 23). It has become. The clamp carriage 92 is provided so as to be movable on the alignment roller portion 90 and the roller member 36. The clamp carriage 92 is provided between the molding station mst and the frame setting / die cutting station fst. Move.

(Polymerized casting frame (frameless casting frame))
As shown in FIG. 2, the polymer casting frame 20 in which the casting sand MS is filled to form a mold MD (upper mold MDa, lower mold MDb) (see FIGS. 8 and 17) has an upper surface of the match plate 21 at the lower end. A rectangular cylindrical upper casting frame 19 overlaid on 21u (upper model surface plate), and a rectangular tubular lower casting frame 23 overlaid on the lower surface 21d (lower model surface plate) of the match plate 21 at the upper end; It has. In the present specification and claims, “square” refers to a quadrangle including a square and a rectangle. The frameless casting frame 1 is mainly composed of an upper casting frame 19, a match plate 21 and a lower casting frame 23, and a superposition of these is a polymerization casting frame 20.

(Upper casting frame)
As shown in FIG. 2, the upper casting frame 19 is formed, for example, in a substantially rectangular tube shape from an iron member, and is provided with a predetermined width from the upper end to form four upper castings for forming an upper rectangular parallelepiped opening space UOS. A frame rectangular inner wall surface portion 19a is provided. The upper cast-frame rectangular inner wall surface portion 19a includes an upper inner wall surface 19mv of the upper cast-frame main body 19m and a rectangular inner-pasted plate 19c described later. In the present specification and claims, a “cuboid” includes a cube, and a “rectangle” includes a “square”.
Further, the upper casting frame 19 is provided with four upper casting frame trapezoidal inner wall surface portions that are continuously provided on the rectangular inner wall surface portion 19a of the upper casting frame to form a square trapezoidal molding space UBS that expands downward. 19b. The upper frame shape inner wall surface portion 19b includes an inclined inner wall surface 19ms at the lower portion of the upper frame body 19m and a trapezoidal inner plate 19d for the upper frame, which will be described later. In the present specification and claims, “for forming the molding space UBS” is not limited to the direct partitioning of the molding space BS, but a basic surface for forming the molding space BS (UBS, DBS). Includes what to build. The same applies to the opening space OS (UOS, DOS).

  As shown in FIG. 5, each upper casting frame rectangular inner wall surface portion 19 a is made of, for example, a standard steel plate having a uniform thickness of 5 mm and formed into a rectangular plate shape. Are detachably attached by bolts 195 and nuts 196, respectively. As shown in FIG. 2, as shown in FIG. 2, through holes 19 c 2, which are countersunk with four countersunk holes, are provided on the mold forming surface 19 c 3 of the rectangular inner sticker plate 19 c for the upper casting frame. A through-hole 19a2 corresponding to the through-hole 19c2 is provided in the inner wall surface 19a of the upper cast-frame rectangle so as to penetrate to the outer peripheral surface of the upper-cast-frame main body 19m. The rectangular inner sticking plate 19c for the upper casting frame is in one-to-one correspondence with the upper casting frame rectangular inner wall surface portion 19a by the through hole 19a2 and the bolt 195 inserted into the through hole 19c2 and the nut 196 screwed to the bolt 195. It is stuck. The rectangular inner sticking plate 19c for the upper casting frame is configured such that the head 195a of the countersunk head bolt 195 does not protrude toward the mold forming surface by countersink processing.

Each corner 19c1 of the opening space UOS formed by the rectangular inner bonding plate 19c adjacent to the circumferential direction in the rectangular inner bonding plate 19c for the entire upper casting frame is shown in FIG. 4 instead. As described above, the adjacent inner cast plates 19c for the upper casting frame are in contact with each other without any gap. Each corner 19c1 has an end of a mold forming surface 19c3 of an adjacent upper casting frame rectangular inner sticking plate 19c only on one end face 19c4 of both end faces of the upper casting frame rectangular inner sticking plate 19c. By abutting on the part, it abuts without a gap.
For example, when one rectangular inner sticking plate 19c for the upper casting frame is shorter than the normal dimension, the mold forming surface 19c3 of the rectangular inner sticking plate 19c formed for the upper casting frame is adjacent to the upper side. As long as it can be brought into contact with the end surface 19c4 of the rectangular inner frame plate 19c, an error of a short length is absorbed, and the upper inner frame 19c is formed into the upper inner frame wall surface portion 19a. Can be attached to. And the clearance gap has not arisen in the corner part 19c1 formed with the rectangular internal sticking board 19c for adjacent upper casting frames.

  As shown in FIG. 2 and FIG. 3, each upper cast frame trapezoidal inner wall surface portion 19b has a trapezoidal inner shape made of a standard steel plate having a uniform thickness of 5 mm and formed in a trapezoidal plate shape, for example. The sticking plates 19d are detachably attached by bolts 195 and nuts 196, respectively.

As shown in FIG. 2, the mold forming surface 19 d 3 of the trapezoidal inner sticking plate 19 d for the upper casting frame has through holes in which countersink processing is performed at a total of eight places in two upper and lower stages arranged in the circumferential direction. A hole 19d2 is provided. A through-hole 19b2 corresponding to the through-hole 19d2 of the upper-cast-frame trapezoidal inner sticking plate 19d is also provided in the upper-cast-frame trapezoidal inner wall surface portion 19b so as to penetrate to the outer peripheral surface of the upper cast-frame main body 19m. Yes. One upper casting frame trapezoidal inner sticking plate 19d includes a through hole 19b2, a bolt 195 inserted into the through hole 19d2, and a nut 196 screwed into the bolt 195 at one location. The surface portion 19b is attached to the surface portion 19b.
As shown in FIGS. 3 and 5, the trapezoidal inner sticking plate 19 d for the upper casting frame is configured such that the head 195 a of the countersunk head bolt 195 does not protrude toward the mold forming surface 19 d 3 by countersink processing.

  Each corner portion 19d1 of the molding space UBS formed by the trapezoidal inner sticking plate 19d adjacent in the circumferential direction of the trapezoidal inner sticking plate 19d for the entire upper casting frame is shown in FIG. 3 and FIG. As described above, the trapezoidal inner sticking plates 19d for upper casting frames are in contact with each other without a gap. Each corner 19d1 has an end of the mold forming surface 19d3 of the adjacent upper cast-frame trapezoidal inner sticking plate 19d, only one of the end faces 19d4 on both sides of the upper cast-frame trapezoidal inner sticking plate 19d. By abutting on the part, it abuts without a gap.

In the upper casting frame 19, as shown in FIGS. 3 and 4, the upper casting frame corner portion 19e formed between the adjacent upper casting frame rectangular inner wall surface portions 19a has a rectangular inner bonding plate for the upper casting frame. A rectangular inner sticking plate relief groove 19fc for an upper casting frame for allowing a dimensional error and a sticking error of 19c is provided so as to extend in the vertical direction. For the upper casting frame to allow the dimensional error and the pasting error of the upper casting frame trapezoidal inner sticking plate 19d at the upper casting frame corner portion 19e formed between the adjacent upper casting mold frame inner wall portions 19b. A trapezoidal inner sticking plate relief groove 19fd is provided so as to extend in the vertical direction.
For example, if a single upper cast-frame trapezoidal inner sticking plate 19d is formed to be longer than the normal dimension, the upper cast-frame trapezoidal inner sticker plate 19d has a mold-forming surface 19d3. It protrudes to the outside of the end surface 19d4 of the trapezoidal inner sticking plate 19d for the adjacent upper casting frame in contact by an error amount. The length of the protruding error is absorbed by the trapezoidal inner sticking plate relief groove 19fd for the upper casting frame, and the upper casting frame trapezoidal inner sticking plate 19d is correctly pasted on the upper casting mold base inner wall surface portion 19b. Can be worn.

  As shown in FIG. 5, the upper casting frame 19 is formed by combining four strip thin plate-like upper casting frame end face plates 19 g on the mating surface side of the upper casting frame 19 overlapped with the upper surface 21 u of the match plate 21. The lower cast frame end face plates 23g are arranged in a frame shape, and are provided so as to be detachable by four countersunk screws 197, respectively. The upper casting frame 19 is worn by contact with the upper surface 21u (upper model surface plate) of the match plate 21 at the mating surface. However, by simply replacing the upper casting frame end face plate 19g, the upper casting frame 19 can be easily put into a state before wearing. Can be restored.

(Lower casting frame)
The lower casting frame 23 is formed in, for example, a substantially rectangular cylindrical shape from an iron member, and is placed below the upper end of the lower casting frame 23 in a state of being overlapped below the upper casting frame 19 as shown in FIGS. Four bottom cast frame trapezoidal inner wall surface portions 23b for forming a square trapezoidal molding space DBS that expands toward the surface are provided. The lower cast frame trapezoidal inner wall surface portion 23b includes an inclined inner wall surface 23ms at the upper part of the lower cast frame main body 23m and a lower cast frame trapezoidal inner plate 23d described later.
The lower casting frame 23 is provided with four lower casting frame rectangular inner wall surface portions 23a that are continuous with the lower casting frame trapezoidal inner wall surface portion 23b and for forming a rectangular parallelepiped opening space DOS up to the lower end of the lower casting frame 23. . The lower casting frame rectangular inner wall surface portion 23a includes a lower inner wall surface 23mv of the lower casting frame main body 23m and a rectangular inner sticking plate 23c for a lower casting frame described later.

  Each lower cast frame trapezoidal inner wall surface portion 23b has, for example, a trapezoidal inner sticker plate 23d made of a standard steel plate having a uniform thickness of 5 mm and formed into a trapezoidal plate, respectively, with a bolt 195 and a nut. 196 is detachably attached.

As shown in FIG. 2, the mold forming surface 23 d 3 of the trapezoidal inner sticking plate 23 d 3 for the lower casting frame has through holes in which countersunk processing is performed at a total of eight places in the upper and lower stages arranged in four places in the circumferential direction. A hole 23d2 is provided. A through hole 23b2 corresponding to the through hole 23d2 of the lower cast frame trapezoidal inner sticking plate 23d is also provided in the lower cast frame trapezoidal inner wall surface portion 23b so as to penetrate to the outer peripheral surface of the lower cast frame main body 23m. . One piece of trapezoidal inner sticking plate 23d for the lower cast frame is formed of a through-hole 23b2, a bolt 195 inserted into the through-hole 23d2, and a nut 196 screwed to the bolt 195 at one location of the lower cast-frame trapezoidal inner wall. It is affixed to the surface part 23b on a one-to-one basis.
In the trapezoidal inner plate 23d for the lower casting frame, the head 195a of the countersunk bolt 195 does not protrude toward the mold forming surface 23d3 by countersink processing.

  Each corner portion 23d1 formed by the lower-casting-frame trapezoidal inner sticking plate 23d in the circumferential direction of the all-bottom-casting trapezoidal inner-pasting plate 23d is adjacent as shown in FIG. The trapezoidal inner sticking plates 23d for the lower casting frame are in contact with each other without a gap. Each corner 23d1 has only one end face 23d4 out of the end faces on both sides of the lower casting frame trapezoidal inner sticking plate 23d, and the end of the mold forming surface 23d3 of the adjacent lower casting frame trapezoidal inner sticking board 23d. It is in contact with the part.

  Each lower casting frame rectangular inner wall surface 23a is detachably attached, for example, a rectangular inner sticking plate for a lower casting frame made of a standard steel plate having a uniform thickness of 5 mm and formed into a rectangular plate shape. 23c is detachably attached by bolts 195 and nuts 196, respectively.

As shown in FIG. 2, through-holes 23 c 2, which are countersunk in four locations arranged in the circumferential direction, are provided on the mold forming surface 23 c 3 of the rectangular inner sticking plate 23 c for the lower casting frame. A through-hole 23a2 corresponding to the through-hole 23c2 of the rectangular inner-pasting plate 23c for the lower casting frame is also provided in the lower casting frame rectangular inner wall surface portion 23a. One piece of the rectangular inner sticking plate 23c for the lower casting frame has a rectangular inner wall of the lower casting frame at one location by a through hole 23a2 and a bolt 195 inserted into the through hole 23c2 and a nut 196 screwed to the bolt 195. It is affixed to the surface part 23a on a one-to-one basis.
The rectangular inner sticking plate 23c for the lower casting frame is configured such that the head 195a of the countersunk head bolt 195 does not protrude toward the mold forming surface 23c3 by countersink processing.

  Each corner 23c1 formed by the rectangular inner bonding plate 23c adjacent in the circumferential direction among the rectangular inner bonding plates 23c for all lower casting frames is adjacent as shown in FIG. The rectangular inner-plates 23c for the lower casting frame are in contact with each other without a gap. Each corner 23c1 has only one end face 23c4 among the end faces on both sides of the rectangular inner sticking plate 23c for the lower casting frame, and the end of the mold forming surface 23c3 of the adjacent rectangular inner sticking board 23c for the lower casting frame. It is in contact with the part.

  In the lower casting frame 23, as shown in FIG. 4 as a substitute, the lower casting frame corner 23e formed between the adjacent lower casting frame rectangular inner wall surface portions 23a and between the adjacent lower casting frame base shape inner wall surface portions 23b is used. Of the rectangular inner sticking plate 23c for the lower casting frame, the rectangular inner sticking plate relief groove 23fc for the lower casting frame, and the trapezoidal inner sticking plate 23d for the lower casting frame. A trapezoidal inner sticking plate relief groove 23fd for lower casting frame for allowing dimensional errors and sticking errors is provided so as to extend in the vertical direction. The action of the rectangular inner sticking plate relief groove 23fc for the lower casting frame and the trapezoidal inner sticking plate relief groove 23fd for the lower casting frame is as follows. This is the same as the shape of the inner sticking plate relief groove 19fd.

  As shown in FIG. 6, the bottom casting frame 23 is combined with four strip thin plate-like bottom casting frame end face plates 23 g on the mating surface side to be overlaid on the lower surface 21 d (model surface plate for lower mold) of the match plate 21. The lower cast frame end face plates 23g are detachably provided by four countersunk screws 197, respectively. The lower casting frame 23 is worn by contact with the lower surface 21d of the match plate 21 at the mating surface. However, the lower casting frame 23 can be easily restored to the pre-wearing state by simply replacing the lower casting frame end face plate 23g.

(Match plate)
As shown in FIG. 2, the match plate 21 includes an upper mold surface plate (an upper surface 21 u of the match plate 21) on which the upper mold model Ma is arranged and the upper casting frame 19 is superimposed on the upper surface, and a lower mold model. The lower mold surface plate (lower surface 21d of the match plate 21) on which Mb is arranged and the lower casting frame 23 is superimposed on the lower surface is joined back to back and formed integrally. It has a rectangular support frame (not shown) with a hole formed in the center, and a model holding plate (not shown) locked to a locking edge formed along the hole of the support frame. Yes.

(Frame set / die cutting station)
As shown in FIG. 1, the frame setting / die cutting station fst includes an elevating roller base 98 guided by the base 4 so as to be movable up and down, and an elevating support cylinder 100 that slidably supports the elevating roller base on the base. It is equipped with. Above the elevating roller table 98, one end of the lower turntable 106, the transport roller 110 into which the match plate 21 is carried, and one end of the upper turntable 114 are positioned as a frame setting / die cutting position fsp.

  The elevating roller table 98 has an elevating support cylinder 100 that is slidably supported in the guide hole of the base 4, and the elevating support cylinder 100 is communicated with an air pump (not shown), and between the air pump and the elevating support cylinder 100. The operation is controlled by opening and closing an unillustrated electromagnetic valve provided in the. A pair of horizontal frames 102 extending in the X direction are provided at the upper end of the lifting support cylinder 100. A plurality of pairs of roller pieces 104 are rotatably supported on the horizontal frame 102 inside. Further, the elevating roller base 98 is provided at the rising end so as to be aligned with the alignment roller portion 90.

The lower turntable 106 and the upper turntable 114 positioned above the lower turntable 106 are a lower end portion and an upper end portion of a rotating peripheral wall 113 that are externally fitted to a rotating support shaft 116 provided in parallel with the lifting roller base 98. Each is fixed integrally to the part. The rotation peripheral wall 113 and the rotation support shaft 116 are provided so as to be relatively rotatable relative to each other. Support arms 115 extending in the horizontal direction are provided on both sides of the rotation support shaft 116 on the upper turntable 114 and the lower turntable 106, respectively. The support arms 115 on both sides are provided with support walls 117 facing each other at a predetermined interval, and engagement protrusions (not shown) are provided on the inner sides of the support walls 117 to face each other. The opposing support walls 117 are provided so that the upper casting frame 19 or the lower casting frame 23 can be disposed therebetween, and the engagement protrusions (not shown) provided on the opposing engaging projections on the upper casting frame 19 and the lower casting frame 23, respectively. By engaging the joint portion, the upper casting frame 19 or the lower casting frame 23 is detachably held between the support walls 117.
In addition, the opposing support wall 117 is configured such that a lifting roller table 98 and a mold table 120 described later can pass therethrough. The rotating peripheral wall 113 is supported by a rotating support shaft 116 via a bearing (not shown), and is rotated with respect to the rotating support shaft 116 by a reduction device and a motor (not shown), so that the rotating peripheral wall 113 is rotated. As a result, the lower turntable 106 and the upper turntable 114 rotate in synchronization. Then, the lower casting frame 23 or the upper casting frame 19 engaged with the respective support arms 115 is rotationally moved between the frame setting / die cutting station fst and the frame alignment / frame cutting station tst.

  A pair of orthogonal support frames 108 extending in the Y direction (horizontal direction orthogonal to the X direction) is provided between the lower turntable 106 and the upper turntable 114, and a plurality of conveyances are provided inside the orthogonal support frame 108. A roller 110 is rotatably supported. The conveyance roller 110 carries the match plate 21 in and out. One end of the above-described upper turntable 114 is positioned above the orthogonal support frame 108 as a frame setting / die cutting position fsp. In addition, by raising the elevating roller table 98 on which the lower casting frame 23 is placed, the match plate 21 placed on the transport roller 110 and the upper turntable 114 are positioned at the frame setting / die cutting position fsp. A superposed casting frame 20 is formed by overlapping the casting frame 19. These raising / lowering roller table 98, conveying roller 110, lower turntable 106, upper turntable 114, and the like constitute a casting frame polymerization apparatus.

(Frame alignment / frame removal station)
The frame alignment / frame removal station tst includes a mold alignment apparatus 118 including a mold table 120 on which the mold MD is placed and a lifting shaft cylinder 119 that supports the mold table so as to be movable up and down. Above the mold table 120, the other end of the lower turntable 106 and the other end of the upper turntable 114 are positioned as a frame alignment / frame removal position tsp.

  As shown in FIG. 1, the mold aligning device 118 includes an elevating shaft cylinder 119, and the piston portion of the elevating shaft cylinder 119 is guided to be movable up and down with respect to the base 4. The lift shaft cylinder 119 is communicated with an air pump (not shown), and its operation is controlled by opening and closing an electromagnetic valve (not shown) provided between the air pump and the lift shaft cylinder 119. A mold table 120 on which the mold MD is placed is provided at the upper end of the lift shaft cylinder 119. A mold removal head 122 driven by an air cylinder (not shown) is guided above the upper turntable 114 so as to be movable up and down with respect to the top frame 6. A punching plate 124 is provided at the lower end portion of the mold punching head 122, and the punching plate 124 is formed so as to be fitted into the inner periphery of the upper casting frame 19.

Above the frame alignment / frame cutting station tst, the casting sand charging device 26 and the squeeze device 24 are connected to move the casting sand charging device 26 between the molding station mst and the frame setting / die cutting station fst. A shuttle cylinder 86 for positioning and positioning the squeeze device 24 at the molding station mst is provided.
The surface of the upper casting frame trapezoidal inner sticking plate 19d attached to the upper casting frame trapezoidal inner wall surface portion 19b of the upper casting frame 19, the upper surface 21u of the match plate 21, and the upper model attached to the upper surface 21u A molding space UBS for molding the upper mold MDa (see FIGS. 8 and 16) is formed by the surface of Ma (see FIG. 2), and the lower casting that is adhered to the lower casting frame trapezoidal inner wall portion 23b of the lower casting frame 23 A molding space DBS for molding the lower mold MDb is formed by the surface of the frame-shaped trapezoidal inner plate 23d, the lower surface 21d of the match plate 21 and the surface of the lower mold model Mb attached to the lower surface 21d (FIG. 2). reference).
An opening space UOS of the upper casting frame 19 is formed by a rectangular parallelepiped space enclosed by the rectangular inner sticking plate 19c for the upper casting frame attached to the upper casting frame rectangular inner wall surface portion 19a, and the lower casting frame rectangular inner wall surface portion 23a. An open space DOS of the lower casting frame 23 is formed by a rectangular parallelepiped space surrounded by the rectangular inner sticking plate 23c attached to the lower casting frame.

(Operation)
Next, the operation | movement using the frameless type casting frame 1 of the said structure is demonstrated below based on figures.
The upper casting frame 19 and the lower casting frame 23 constituting the frameless casting frame 1 of the present embodiment are the first upper casting frame 191 and the first lower casting frame arranged at the frame setting / die cutting station fst in FIG. Two sets of a casting frame 231 and a second upper casting frame 192 and a second lower casting frame 232 arranged at the frame alignment / frame removal station tst are prepared. The first and second upper casting frames 191 and 192 are the same type of upper casting frame 19, and the first and second lower casting frames 231 and 232 are the same type of lower casting frame 23. The first and second upper casting frames 191 and 192 and the first and second lower casting frames 231 and 232 are alternately used repeatedly for molding. The match plate 21 includes a plurality of match plates 21 arranged on the conveying roller 110, and the match plate 21 positioned at a position corresponding to the frame setting / die cutting position fsp is aligned with the upper casting frame 19 and the lower casting frame 23. And used for molding. In principle, the same match plate 21 is used until the planned number of mold productions is completed.
The second upper casting frame 192 and the second lower casting frame 232 arranged at the frame alignment / frame removal station tst stand by in a state where the upper mold MDa and the lower mold MDb formed in advance are respectively held. Yes.

  First, in the frame setting / die cutting station fst, as shown in FIG. 1, the first lower casting frame 231 is engaged with the lower turntable 106 in order from the bottom, and is arranged at the frame setting / die cutting position fsp for conveyance. A match plate 21 is disposed on the roller 110, and a first upper casting frame 191 is engaged with the upper turntable 114 and disposed at a frame setting / die cutting position fsp. The first lower casting frame 231, the match plate 21 and the first upper casting frame 191 face each other so as to be fitted together. An elevating roller base 98 is disposed immediately below the first lower casting frame 231, and a foundry sand charging device 26 (hopper 74) is disposed above the first upper casting frame 191. The sand measuring unit 82 of the foundry sand throwing device 26 stores the foundry sand MS to be thrown into the first upper casting frame 191. On the other hand, the piston portion of the horizontal cylinder 94 is advanced, and the clamp carriage 92 is positioned on the roller member 36 of the reversing device 22.

Next, the lifting support cylinder 100 is driven to lift the lifting roller base 98 as shown in FIG. When the lower end of the first lower casting frame 231 comes into contact with the roller piece 104, the engagement of the first lower casting frame 231 with the lower turntable 106 is released, and the first lower casting frame 231 is placed on the lifting roller base 98. To rise. When the first lower casting frame 231 passes between the orthogonal support frames 108, the match plate 21 is received from the conveying roller 110 and the match plate 21 is superimposed on the first lower casting frame 231.
Further, the lifting roller table 98 is raised, and the upper surface of the match plate 21 is brought into contact with the lower end of the first upper casting frame 191 at the rising end of the lifting roller table 98, so that the first upper casting frame 191, the upper turntable 114, The first upper casting frame 191 is overlaid on the match plate 21.
Thus, the 1st upper casting frame 191, the match plate 21, and the 1st lower casting frame 231 are piled up, and the superposition | polymerization casting frame 20 (refer FIG. 2) is formed. Then, the gate plate 80 of the foundry sand throwing device 26 is rotated and positioned in the vertical position, and the foundry sand MS stored in the sand measuring unit 82 is naturally dropped to match the inner surface of the first upper casting frame 191 and the match plate. The molding space UBS and the opening space UOS formed by the upper surface 21u of 21 and the surface of the upper model Ma are filled. At this time, the roller piece 104 is aligned with the aligned roller member 36 and the alignment roller unit 90. Then, by rotating the clamp claw 96 of the clamp carriage 92, the tip thereof is locked to the locked portion of the first lower casting frame 231 (polymerized casting frame 20).

Next, as shown in FIG. 10, the first lower casting frame 231 (polymerized casting frame 20) is molded from the lifting roller table 98 in the frame setting / die cutting station fst by driving the piston of the horizontal cylinder 94 backward. It moves on the roller member 36 of the reversing device 22 in the station mst. And the latching to the to-be-latched part of the 1st lower casting frame 231 (polymerization casting frame 20) is cancelled | released by rotating the clamp nail | claw 96 in a cancellation | release direction.
Then, by driving the air cylinder 40 in the forward direction, the upper surface of the foundry sand MS filled with the sand retainer plate 54 fitted into the inner peripheral portion of the first upper casting frame 191 (polymerized casting frame 20). Abut. At this time, the tip end portion of the rod member 48 of the upper cast frame support member 50 is brought into contact with the upper end portion of the first upper cast frame 191. At this time, the tip tapered portion of the rod member 48 is fitted into the tapered hole of the first upper casting frame 191. The air cylinder 40 is loaded and maintained with such a light pressure that the sand presser plate 54 does not come off from the inner periphery of the first upper casting frame 191. Since the upper end portion of the first upper casting frame 191 is in contact with the upper casting frame support member 50 and the first lower casting frame 231 is placed on the roller member 36, the superposed casting frame 20 (first upper casting frame 191). The match plate 21 and the first lower casting frame 231 are sandwiched from above and below by the pressure of the air cylinder 40 at the molding position msp.
At the same time, the gate plate 80 of the hopper 74 is rotated and positioned in a horizontal position, and the sand metering portion 82 is charged into the molding space DBS and the open space DOS that are formed by the first lower casting frame 231. The foundry sand MS is transported and stored by a conveyor device (not shown).

  Next, as shown in FIG. 11, the upside down of the superposed casting frame 20 is reversed by turning the reversing device 22 upside down around the rotation shaft 32 (see FIG. 1). The molding space DBS formed by the first lower casting frame 231 is positioned at the upper portion, and the lower end portion (upper end portion in FIG. 11) of the first lower casting frame 231 is opened. Further, the lower end portions of the four guide rods 44 are in a state of facing the regulating member 55 through the gaps.

Next, as shown in FIG. 12, the piston portion of the shuttle cylinder 86 is driven in the forward direction, and the hopper 74 is moved from the frame setting / die cutting station fst to the molding station mst. The lower end opening of the hopper 74 is opposed to the opening of the first lower casting frame 231.
Then, by rotating the gate plate 80 and positioning the gate plate 80 in the vertical position, the foundry sand MS is naturally dropped from the sand measuring portion 82 and is put into the molding space DBS and the open space DOS formed by the first lower casting frame 231. .

  Next, as shown in FIG. 13, the shuttle cylinder 86 is driven to move backward, the squeeze device 24 is moved to the molding station mst, and the squeeze plate 68 is applied to the foundry sand MS filled in the first lower casting frame 231. Make them face each other. In the meantime, the gate plate 80 of the hopper 74 is rotated and positioned at the horizontal position.

  Next, as shown in FIG. 14, the squeeze cylinder 62 is driven in the forward direction, and the squeeze plate 68 is fitted into the inner periphery of the first lower casting frame 231.

Next, as shown in FIG. 15, the squeeze plate 68 is further lowered in a state where the squeeze plate 68 is in contact with the foundry sand MS in the first lower casting frame 231, so that the foundry sand MS in the first lower casting frame 231 is reduced. Squeeze.
At this time, due to the pressure of the squeeze, the casting sand MS in the first lower casting frame 231 is compressed, and the force that moves the polymerization casting mold 20 downward by friction between the casting sand MS and the inner surface of the first lower casting mold 231. Work. Due to the downward force, the superposed casting frame 20 moves downward against the repelling force of the metal spring, and the presser plate 42 of the reversing device 22 is acted on by the downward moving force via the upper casting frame support member 50. The guide rod 44 projecting from the presser plate 42 contacts the restricting member 55 by moving downward.
Then, the guide rod 44 receives a reaction force by the restriction member 55 that moves downward and contacts, and the reaction force is transmitted to the presser plate 42 via the guide rod 44. Since the sand presser plate 54 is fixed to the presser plate 42, the sand presser plate 54 that is in contact with the foundry sand MS of the first upper cast frame 191 is moved downward by the superposed cast steel frame 20. Further, it is inserted (entered) into 191 to squeeze the foundry sand MS in the upper casting frame 19.
Thus, by squeezing the foundry sand MS inside the first lower casting frame 231 with the squeeze plate 68, the foundry sand MS inside the first upper casting frame 191 can be squeezed simultaneously. Thus, by simultaneously squeezing, the pressure applied to only one surface of the match plate 21 is not biased, and deformation / breakage of the match plate 21 can be prevented.

Next, as shown in FIG. 16, the squeeze plate 68 is lifted by driving the squeeze cylinder 62 in the backward direction, and the squeeze plate 68 is separated from the inner periphery of the lower casting frame 23. At this time, the superposed cast frame 20 is sandwiched from above and below by the roller member 36 and the upper cast frame support member 50.
On the other hand, at the frame alignment / frame removal station tst, the following steps are performed in parallel. By driving the elevating shaft cylinder 119 in the forward direction, the mold table 120 is raised and the second lower casting frame 232 is received from the lower turntable 106. The mold table 120 is fitted into the inner periphery of the second lower casting frame 232 and contacts the lower surface of the mold MDb. Further, by raising the mold table 120 on which the second lower casting frame 232 is placed, the second lower casting frame 232 is overlapped with the second upper casting frame 192 placed on the upper turntable 114. Then, the punching plate 124 of the mold punching head 122 is fitted into the inner periphery of the second upper casting frame 192, and mold matching is performed to match the upper mold MDa and the lower mold MDb.

Next, as shown in FIG. 17, the reversing device 22 is rotated 180 degrees so that the superposed casting frame 20 is turned upside down, and the first upper casting frame 191 is positioned upward and the first lower casting frame 231 is positioned downward. To do. And the front-end | tip is latched by the to-be-latched part of the 1st lower casting frame 231 by rotating the clamp nail | claw 96 of the clamp trolley 92. FIG. At the same time, the aligning roller unit 90, the roller member 36 of the reversing device 22 and the roller piece 104 of the lifting roller table 98 are aligned.
On the other hand, at the frame alignment / frame removal station tst, the following steps are performed in parallel. The mold table 120 is lowered, the upper mold MDa is extracted from the second upper casting frame 192 engaged with the upper turntable 114, and the frame is extracted. By further lowering the mold table 120 on which the upper mold MDa, the second lower mold frame 232, and the lower mold MDb are placed, the lower mold MDb is extracted from the second lower mold frame 232 at the position of the lower turntable 106. The frame is removed to complete a mold MD in which upper and lower molds MDa and MDb are stacked. Then, the completed mold MD is carried out to a storage warehouse by an unillustrated conveyor.

In the molding station mst, the following steps are performed for the polymer casting frame 20 formed by the first upper casting frame 191 and the first lower casting frame 231.
By driving the horizontal cylinder 94 in the forward direction and moving the clamp carriage 92 to the roller member 36, the superposed casting frame 20 is moved to the frame setting / die cutting position fsp of the frame setting / die cutting station fst. At that time, the first upper casting frame 191 enters between the opposing support walls 117. Then, by lowering the lifting roller base 98 from the rising end, the engaged portion of the first upper casting frame 191 is engaged with the engaging protrusion of the support wall 117 of the upper turntable 114, and the upper turntable 114 is The upper casting frame 191 is fixed.

Then, as shown in FIG. 18, the match plate 21 is received by the transport roller 110 of the orthogonal support frame 108 by further lowering the lifting roller base 98 on which the match plate 21 and the first lower casting frame 231 are placed. Let me accept. Then, the lifting roller table 98 on which only the first lower casting frame 231 is placed is further lowered, and the engaged portion of the first lower casting frame 231 is engaged with the engaging portion of the lower turntable 106.
The match plate 21 placed on the transport roller 110 is continuously placed at the frame setting position and repeatedly used until the planned number of productions of the mold MD is completed. Then, when the production of the expected number of molds MD is completed, it is carried out to a storage box (not shown), and the match plate 21 on which a new model M is set is carried into the frame setting position of the conveyance roller 110. .

  Next, as shown in FIG. 19, the lower turntable 106 and the upper turntable 114 are rotated 180 degrees in the horizontal direction, and the first upper casting frame 191 and the first lower casting frame 231 are moved to the frame alignment / frame removal station tst. It is moved and positioned at the frame alignment / frame removal position tsp. The first upper casting frame 191 and the first lower casting frame 231 are processed through the same process as the second upper casting frame 192 and the second lower casting frame 232 in FIGS. It is carried out in a combined state.

  Note that the second upper casting frame 192 and the second lower casting frame 232 from which the mold MD is extracted in FIG. 17 are set as shown in FIG. 19 by rotating the upper and lower turntables 106 and 114 by 180 degrees. It moves to the die-cutting station fst and is superimposed on the match plate 21 placed on the conveying roller 110 to form the superposed casting frame 20. Thereafter, the same molding process is repeated.

(Replacement of inner plate)
The inner sticking plates 19c, 19d, 23c, and 23d are the inner sticking plates 19c, 19d, and 19d when the squeeze device 24 is squeezed after the casting sand MS is put into the upper casting frame 19 and the lower casting mold 23 (see FIG. 15). 23c, 23d and the foundry sand MS wear due to high pressure contact.
Further, the inner plates 19c, 19d, 23c, and 23d are extracted from the upper casting frame 19 and the lower casting frame 23 at the same time after the upper mold MDa and the lower mold MDb are aligned at the frame alignment / frame removal station tst ( 16 and 17), the foundry sand MS on the surfaces of the upper mold MDa and the lower mold MDb and the inner plates 19c, 19d, 23c, and 23d are rubbed and worn.
The operator who performs the replacement work removes only the worn inner sticking plates 19c, 19d, 23c, and 23d from the upper casting frame 19 or the lower casting frame 23 by releasing the fastening with the bolts 195 and the nut 196. It replaces with the new inner sticking plates 19c, 19d, 23c, and 23d to be tightened with bolts 195 and nuts 196. Since the inner plates 19c, 19d, 23c, and 23d are standard steel plates having a uniform thickness, the lower-priced inner plates 19c, 19d, 23c, and 23d can be easily replaced.

As is clear from the above description, the frameless casting frame 1 of the present embodiment is formed in a rectangular tube shape and is superimposed on the upper surface 21u (upper model surface plate) of the match plate 21 so that the upper mold MDa is used. An upper casting frame 19 for molding, and a lower casting frame 23 for forming the lower mold MDb by being superimposed on the lower surface 21d (lower mold surface plate) of the match plate 21 formed in a rectangular cylinder shape. This is a frameless casting frame 1.
The upper casting frame 19 (191, 192) includes four rectangular upper rectangular wall surfaces 19a for forming a rectangular parallelepiped opening space OS (UOS) with a predetermined width from the upper end of the upper casting frame 19, and the upper casting frame. Four upper cast-frame base-shaped inner wall surface portions 19b are provided, which are formed continuously from the rectangular inner wall surface portion 19a and form a square trapezoidal molding space BS (UBS) that expands downward.
The lower casting frame 23 (231, 232) has a square trapezoidal shaped molding space BS (DBS) that expands downward from the upper end of the lower casting frame 23 in a state of being overlapped below the upper casting frame 19. Four lower cast frame base inner wall surface portions 23b for forming, and four for forming a rectangular parallelepiped open space OS (DOS) up to the lower end of the lower cast frame 23, continuous to the lower cast frame base inner wall surface portion 23b. A lower casting frame rectangular inner wall surface portion 23a.
Each upper cast frame trapezoidal inner wall surface portion 19b is detachably attached to a trapezoidal trapezoidal inner sticker plate 19d formed in a trapezoidal plate shape with a uniform thickness. A trapezoidal inner frame plate 23d having a uniform thickness and formed in a trapezoidal plate shape is attached to the surface portion 23b so as to be detachable, and an upper and lower cast frame inner frame plate 19d, In the corners 19d1, 23d1 in the circumferential direction of the molding space BS (UBS, DBS) formed by 23d, the adjacent inner plates 19d, 23d are in contact with each other without a gap.

  According to this, the trapezoidal inner sticking plates 19d and 23d for the upper and lower cast frames are plate materials having a uniform thickness corresponding to the shapes of the upper and lower cast frame trapezoidal wall surfaces 19b and 23b. Thereby, it is possible to replace the inner plates 19d and 23d, which have been required to be replaced due to wear due to use, at a low manufacturing cost without the need to process them into a tapered shape as in the prior art. The corners 19d1, 23d1 in the circumferential direction of the molding space BS (UBS, DBS) do not enter the gap between the inner plates 19d, 23d adjacent to the casting sand MS in the circumferential direction, and are formed on the surfaces of the molds MDa, MDb. It does not cause burrs and does not cause surface collapse.

  In addition, the inclination angle of the upper cast-frame-shaped inner wall surface portion 19b and the lower cast-frame frame-shaped inner wall surface portion 23b is 3 to 5 degrees with respect to the vertical plane, and each of the inner pasting plates 19c, 19d, 23c, and 23d has a thickness. 4-9 mm, and the lower casting frame trapezoidal inner plate 23d has an upper end surface 23d5 in contact with the match plate 21 and a mold forming surface 23d3 in contact with the foundry sand MS formed at right angles. .

According to this, as shown in FIG. 7, the gap T formed by the lower surface 21d of the match plate 21 and the upper end surface 23d5 of the trapezoidal inner plate 23d for the lower casting frame is the thickness t of the inner plate 23d, When it is set as the inclination angle θ with respect to the vertical plane of the lower casting frame trapezoidal inner wall surface portion 23b, it can be expressed by the following approximate expression.
2πtθ / 360 = T (Expression 1)
It is known from experience that the casting sand MS does not enter when the gap T is 0.5 mm or less. Therefore, in the case where T ≦ 0.5 mm is a condition for the gap T, the thickness t of the trapezoidal inner plate 23d for the lower casting frame and the inclination angle θ of the trapezoidal inner plate 23d for the lower casting frame It is desirable to apply under the following conditions.
For example, if a 9 mm thick thickness is used for the trapezoidal inner plate 23d for the lower casting frame, the tilt angle θ with respect to the vertical plane of the inner wall surface portion 23b of the lower casting frame shape is 3.18 ° from Equation 1. The following is desirable.
For example, when the inclination angle θ with respect to the vertical plane of the lower cast frame trapezoidal inner wall surface portion 23b is 5 °, the thickness t of the lower cast frame trapezoidal inner sticking plate 23d is preferably 5.73 mm or less from Equation 1.

  Each of the trapezoidal inner plates 19d and 23d is obtained by cutting a standard steel plate into a trapezoidal shape corresponding to the shape of the upper casting frame trapezoidal inner wall surface portion 19b and the lower casting frame trapezoidal inner wall surface portion 23b. is there.

  According to this, since the inner plates 19d and 23d only cut the standard steel plate into a trapezoidal shape in accordance with the shapes of the upper cast frame trapezoidal inner wall surface portion 19b and the lower cast frame trapezoidal inner wall surface portion 23b, the manufacturing cost Can be reduced.

  Further, the corners 19d1 and 23d1 in the circumferential direction of the molding space BS (UBS, DBS) are such that only one end face 19d4 or 23d4 of both end faces of the inner sticking plates 19d and 23d is adjacent to the inner sticking plate 19d, 23d is in contact with the mold forming surfaces 19d3 and 23d3.

According to this, even when a dimensional error (long or short of the inner adhesive plate) occurs in the inner adhesive plates 19d and 23d, the terminal portions (mold forming surfaces 19d3 and 23d3) on the opposite side of the contacted end surfaces 19d4 and 23d4. Then, as long as the end surfaces 19d4 and 23d4 of the inner adhesive plates 19d and 23d adjacent to the mold forming surfaces 19d3 and 23d3 of the inner adhesive plates 19d and 23d come into contact with each other from a right angle, a gap between the adjacent inner adhesive plates 19d and 23d is obtained. Disappears.
Accordingly, it is possible to absorb the dimensional error of the inner adhesive plates 19d and 23d and easily form the corner portions 19d1 and 23d1 having no gap between the adjacent inner adhesive plates 19d and 23d.

  Further, in each upper casting frame corner portion 19e between the adjacent upper casting frame trapezoidal inner wall surface portions 19b of the upper casting frame 19, a trapezoidal inner sticking plate relief groove 19fd for the upper casting frame is provided along the vertical direction. In each lower cast frame corner portion 23e between the adjacent lower cast frame trapezoidal inner wall surfaces 23b of the lower cast frame 23, a trapezoidal inner sticking plate relief groove 23fd for the lower cast frame is provided along the vertical direction. Yes.

  According to this, even when a dimensional error or assembly error larger than the set size of the inner sticking plates 19d, 23d occurs, the inner sticking plate relief groove 19fd of the upper casting mold trapezoidal shape and the inner shape of the lower casting mold trapezoid An error can be absorbed by the sticking plate relief groove 23fd, and the adjacent inner sticking plates 19d and 23d can be contacted with no gap.

In addition, each upper casting frame rectangular inner wall surface portion 19a has a rectangular inner plate 19c formed in a rectangular plate shape and having a uniform thickness so as to be detachable. On the inner wall surface 23a, a rectangular inner sticking plate 23c for a lower casting frame having a uniform thickness is detachably stuck, and is formed by rectangular inner sticking plates 19c and 23c. In the respective corners 19c1 and 23c1 in the circumferential direction of the open spaces UOS and DOS, the adjacent rectangular inner stickers 19c and 23c are in contact with each other without a gap.
According to this, the rectangular inner stickers 19c and 23c for the upper and lower casting frames are plate materials having a uniform thickness corresponding to the shapes of the upper and lower casting frame rectangular wall surfaces 19a and 23a. Thereby, it is possible to replace the inner plates 19c and 23c, which have been required to be replaced due to wear due to use, at a low manufacturing cost without the need to process them into a tapered shape as in the prior art. The corners 19c1 and 23c1 in the circumferential direction of the opening spaces UOS and DOS can be squeezed to lubrication without the molding sand MS entering the gaps between the adjacent inner plates 19c and 23c.

Each of the rectangular inner plates 19c, 23c is obtained by cutting a standard steel plate into a rectangular shape corresponding to the shape of the upper casting frame rectangular inner wall surface portion 19a and the shape of the lower casting frame rectangular inner wall surface portion 23a.
According to this, since the rectangular inner plates 19c, 23c only cut the standard steel plate into a rectangle in accordance with the shapes of the upper casting frame rectangular inner wall surface portion 19a and the lower casting frame rectangular inner wall surface portion 23a, Manufacturing costs can be reduced.

At each corner in the circumferential direction of the opening space OS (UOS, DOS), only one end face 19c4, 23c4 of both end faces of each rectangular inner sticker board 19c, 23c is adjacent rectangular inner sticker board. It abuts against the mold forming surfaces 19c3 and 23c3 of 19c and 23c.
According to this, even when a dimensional error (long or short of the inner adhesive plate) occurs in the inner adhesive plates 19c and 23c, the terminal portions (mold forming surfaces 19c3 and 23c3) on the opposite side of the contacted end surfaces 19c4 and 23c4. Then, as long as the end surfaces 19c4 and 23c4 of the inner adhesive plates 19c and 23c adjacent to the mold forming surfaces 19c3 and 23c3 of the inner adhesive plates 19c and 23c come into contact with each other from a right angle direction, a gap between the adjacent inner adhesive plates 19c and 23c. Disappears.
Accordingly, it is possible to absorb the dimensional error of the inner sticking plates 19c and 23c and easily form the corners 19c1 and 23c1 having no gap between the adjacent inner sticking plates 19c and 23c.

In the upper casting frame corner portion 19e between the upper casting frame rectangular inner wall surface portions 19a adjacent to each other in the upper casting frame 19, a rectangular inner sticking plate relief groove 19fc for the upper casting frame is provided along the vertical direction. In each lower casting frame corner portion 23e between adjacent lower casting frame rectangular inner wall surfaces 23a in the frame 23, a rectangular inner sticking plate relief groove 23fc for the lower casting frame is provided along the vertical direction.
According to this, even when a dimensional error or assembly error larger than the set dimensions of the rectangular inner stickers 19c and 23c occurs, the upper inner frame rectangular inner sticker plate relief groove 19fc and the lower caster rectangle The inner sticking plate relief groove 23fc can absorb the error, and can contact the adjacent rectangular inner sticking plates 19c, 23c without any gap.

In addition, the upper casting frame 19 is provided with a thin plate-like upper casting frame end face plate 19g on the mating surface side to be overlaid on the upper surface 21u (upper model surface plate) of the match plate 21, so that the lower casting frame can be engaged and disengaged. 23, a thin plate-like lower cast frame end face plate 23g is detachably provided on the mating surface side to be overlapped with the lower surface 21d (lower model surface plate) of the match plate 21.
According to this, the wear generated on the mating surface side of the upper casting frame 19 and the lower casting frame 23 can be prevented by the upper casting frame end face plate 19g and the lower casting frame end face plate 23g with simple shapes, and the wear has occurred. In this case, the worn upper frame end face plate 19g or the lower cast frame end face plate 23g can be replaced to easily return to the state before the wear.

In the above embodiment, the inner plates 19c, 19d, 23c, and 23d are attached with the countersunk bolts 195. However, the present invention is not limited to this. For example, a flat head bolt or a flat head screw member may be used. Moreover, you may stick an internal sticking board with the attachment member which is easy to replace | exchange by destroying rivet itself like a rivet.
In addition, a rectangular inner sticker plate 19c for the upper cast frame is attached to the inner inner wall surface portion 19a of the upper cast frame, and a trapezoidal inner sticker plate 19d for the upper cast frame shape is attached to the inner wall surface portion 19b of the upper cast frame base. Then, the lower casting frame trapezoidal inner wall plate 23d is bonded to the lower casting frame trapezoidal inner wall surface portion 23b, and the lower casting frame rectangular inner bonding plate 23c is bonded to the lower casting frame rectangular inner wall surface portion 23a. However, the present invention is not limited to this. For example, the trapezoidal inner sticking plates 19d and 23d may be attached only to the upper caster frame shaped inner wall surface portion 19b and the lower caster frame trapezoidal inner wall surface portion 23b, respectively.

Further, in the molding apparatus that uses the compressed air to put the foundry sand MS into the casting frame, as shown in FIG. 20, vent plugs 320 for discharging the compressed air to the molding casting frame 319 are provided on the inner plates 319c and 319d. And vent holes 319c2 and 319d2 may be provided in the molding frame body 319m. Also in this case, since the inner sticking plates 319c and 319d are plate materials having a uniform thickness, when the inner sticking plates 319c and 319d are worn, a new inner sticking plate having a low manufacturing cost is saved without taking any processing effort. 319c and 319d can be exchanged.
Further, the upper casting frame end face plate 19g and the lower casting frame end face plate 23g are arranged in a rectangular frame shape by combining four strip-like thin plates, respectively. However, the present invention is not limited thereto. The thin plate may be used.

Moreover, in the said embodiment, the upper casting frame 19 which overlaps with the upper surface 21u of the match plate 21, and shape | molds the upper mold MDa, The lower casting frame 23 that overlaps with the lower surface 21d of the match plate 21, and molds the lower mold MDb, However, the present invention is not limited to this.
For example, as shown in FIGS. 21 and 22, a lower mold surface plate 221d (turn plate) in which a lower casting frame 23 and an upper casting frame 19 arranged upside down are arranged side by side on a squeeze table 228. It can also be used for a frameless casting frame that is arranged on the upper mold surface plate 221u (turn plate) and squeezes the lower casting frame 23 and the upper casting frame 19 simultaneously. In the mold making apparatus 222, the molding sand throwing apparatus 26 and the squeeze apparatus 24 are slid and replaced by a shuttle cylinder 86. Two sets of upper and lower casting frames 19 and 23 are set on the turntable 230, and are repeatedly used alternately. The upper casting frame 19 and the lower casting frame 23 are simultaneously squeezed by the squeezing device 24 at a position arranged horizontally after the casting sand MS is charged by the casting sand charging device 26. Then, after each of the model surface plates 221d and 221u is removed, the lower casting frame 23 is transferred by the turntable 230 and turned upside down in a separate process, and the upper casting frame 19 is superimposed on the inverted lower casting frame 23. Then, the lower casting frame 23 is removed in a state where the lower casting frame 23 is overlapped below the upper casting frame 19, and a casting mold in which an upper casting mold and a lower casting mold (not shown) are overlapped is completed.

  DESCRIPTION OF SYMBOLS 1 ... Frameless type casting frame, 2 ... Mold making apparatus, 4 ... Base, 19 ... Upper casting frame, 19a ... Upper casting frame rectangular inner wall surface part, 19b ... Upper casting frame trapezoid inner wall surface part, 19c ... Upper casting 19c1 ... corner, 19c3 ... mold forming surface, 19c4 ... end face, 19d ... trapezoidal inner sticking plate for upper casting frame, 19d1 ... corner, 19d3 ... mold forming surface, 19d4 ... End face, 19e ... Upper frame corner, 19fc ... Rectangular inner plate relief groove for upper cast frame, 19fd ... Trap shaped inner plate escape groove for upper cast frame, 19g ... Upper frame end plate, 191 ... First upper casting frame, 192 ... Second upper casting frame, 20 ... Polymerized casting frame, 21d ... Lower surface of match plate (model plate for lower mold), 21u ... Upper surface of match plate (model surface plate for upper mold), 22 ... reversing device, 221d ... lower surface model surface plate, 221u ... upper surface model surface plate, 23 ... lower casting frame, 23a ... lower surface Inner wall surface of rectangular frame, 23b ... Inner wall surface of lower casting frame, 23c ... Rectangular inner plate for lower casting frame, 23c1 ... Corner, 23c3 ... Mold forming surface, 23c4 ... End surface, 23d ... For lower casting frame Trapezoidal inner sticking plate, 23d1 ... corner, 23d3 ... mold forming surface, 23d4 ... end face, 23e ... lower casting frame corner, 23fc ... rectangular inner sticking plate relief groove for lower casting frame, 23fd ... lower casting frame Trapezoidal inner sticking plate relief groove, 23g ... lower casting frame end face plate, 231 ... first lower casting frame, 232 ... second lower casting frame, 26 ... casting sand throwing device, 28 ... casting frame lateral movement device, 32 ... rotating device (rotating shaft), Ma ... upper mold model, Mb ... lower mold model, MD ... mold, MDa ... upper mold, MDb ... lower mold, MS ... foundry sand, mst ... molding station, fst ... Frame setting / die cutting station, tst ... Frame alignment / frame cutting station, BS (UBS DBS) ... molding space, OS (UOS · DOS) ... open space.

Claims (10)

To form an upper mold that is formed in a square cylinder and stacked on the upper mold surface plate to mold the upper mold, and to form a lower mold that is formed in a rectangular cylinder and stacked on the lower mold surface plate A frameless casting frame comprising a lower casting frame,
The upper casting frame is provided continuously to four rectangular upper rectangular wall surfaces for forming a rectangular parallelepiped opening space with a predetermined width from the upper end of the upper casting frame, and the rectangular rectangular inner wall surface of the upper casting frame. And four upper cast-frame base-shaped inner wall surface portions for forming a square trapezoidal shaped molding space that expands downward.
The lower casting frame has four lower casting frame bases for forming a square-shaped trapezoidal molding space that expands downward from the upper end of the lower casting frame in a state where the lower casting frame is overlapped below the upper casting frame. A shape inner wall surface portion, and four lower casting frame rectangular inner wall surface portions for forming a rectangular parallelepiped opening space to the lower end of the lower casting frame, which is continuous with the lower casting frame base shape inner wall surface portion,
Each of the upper cast frame trapezoidal inner wall surfaces is attached in a trapezoidal plate shape and has a uniform thickness of the trapezoidal trapezoidal inner sticker plate, which is detachably attached,
Each of the lower cast frame trapezoidal inner wall surfaces is formed in a trapezoidal plate shape and has a uniform thickness for the lower cast frame trapezoidal inner sticker plate, which is detachably attached,
Each corner in the circumferential direction of the molding space formed by the upper and lower cast-frame trapezoidal inner sticking plates is frameless molding in which the adjacent inner sticking plates are in contact with each other without a gap. Cast frame. The inclination angle of the upper casting frame base shape inner wall surface portion and the lower casting frame base shape inner wall surface portion is 3 to 5 degrees with respect to the vertical plane,
Each of the inner plates has a thickness of 4 to 9 mm,
2. The blank according to claim 1, wherein an end surface in contact with the lower mold model surface plate and a mold forming surface in contact with foundry sand are formed at right angles in the trapezoidal inner plate for the lower casting frame. Frame-type casting frame.   2. Each of the trapezoidal inner plates is obtained by cutting a standard steel plate into a trapezoidal shape corresponding to the shape of the upper casting frame trapezoidal inner wall surface portion and the shape of the lower casting frame trapezoidal inner wall surface portion. Or the frameless type casting frame of 2.   The corners in the circumferential direction of the molding space are such that only one of the end faces on both sides of each trapezoidal inner sticking plate is in contact with the mold forming surface of the adjacent trapezoidal inner sticking board. The frameless casting mold according to any one of claims 1 to 3. In the upper cast frame corner between adjacent upper cast frame trapezoidal inner wall surfaces in the upper cast frame, a trapezoidal inner sticking plate relief groove for the upper cast frame is provided along the vertical direction,
5. A trapezoidal inner plate relief groove for a lower cast frame is provided along the vertical direction at each lower cast frame corner between adjacent lower cast frame trapezoidal inner wall surfaces in the lower cast frame. The frameless casting mold described in 1. Each upper casting frame rectangular inner wall surface portion is formed in a rectangular plate shape and has a uniform thickness for the inner casting plate for the upper casting frame, and is detachably attached thereto, respectively.
Each lower casting frame rectangular inner wall surface portion is formed in a rectangular plate shape and has a uniform thickness for the inner casting plate for the lower casting frame, and is detachably attached thereto, respectively.
2. The corners in the circumferential direction of the opening space formed by the rectangular plate-like inner sticking plates are such that the adjacent rectangular plate-like inner sticking plates are in contact with each other without any gap. The frameless casting mold according to claim 5.   7. Each of the rectangular inner plates is obtained by cutting a standard steel plate into a rectangular shape corresponding to the shape of the inner wall surface of the upper casting frame and the shape of the inner wall surface of the lower casting frame. The frameless casting mold described in 1.   As for each corner in the circumferential direction of the opening space, only one of the end faces on both sides of each rectangular inner adhesive plate is in contact with the mold forming surface of the adjacent rectangular inner adhesive board. The frameless casting mold according to claim 6 or 7. In the upper casting frame corner between adjacent upper casting frame rectangular inner wall surfaces in the upper casting frame, a rectangular inner adhesive plate relief groove for the upper casting frame is provided along the vertical direction,
9. A rectangular inner adhesive plate relief groove for a lower casting frame is provided along a vertical direction at each lower casting frame corner between adjacent rectangular inner wall surfaces of the lower casting frame in the lower casting frame. The frameless casting mold described in 1. In the upper casting frame, a thin plate-like upper casting frame end face plate is detachably provided on the mating surface side to be overlaid on the upper model surface plate,
10. The lower casting frame according to claim 1, wherein a thin plate-like lower casting frame end face plate is detachably provided on a mating surface side to be overlapped with the lower mold model surface plate. The frameless casting mold described in 1.

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