JP4876745B2 - Casting method and casting apparatus - Google Patents

Description

  The present invention relates to a casting method and a casting apparatus for casting using a single casting mold in a state where a plurality of long workpieces are erected and arranged in parallel.

Conventionally, when casting, for example, a cast iron engine camshaft as a long workpiece, a casting method in which the camshaft is raised is employed (see, for example, Patent Document 1 below).
Japanese Patent Laid-Open No. 10-29054

  By the way, in the casting method as described above, when one casting mold is used and a plurality of, for example, about 10 camshafts are arranged side by side and cast at the same time, end portions in the arrangement direction of the cavities for molding the plurality of camshafts When the molten metal is injected from the molten metal injection port provided in, the gas is entrained in the casting mold and the exhaust pressure acts, and the injected molten metal is pressured and seizing occurs below the cavity. To do. In addition, the injected molten metal does not flow in order along the arrangement direction of the plurality of cavities due to the entrainment of gas, and the preceding molten metal roughens the cavity inner surface and causes seizure.

  Therefore, the present invention has an object to prevent casting defects such as seizure when casting is performed using one casting mold in a state where a plurality of long workpieces are erected and arranged in parallel.

The present invention, when cast using a single casting mold in a state where the word click and arranged so and more parallel upright, melt in the vertical direction the upper part of the parallel arrangement direction one end side of the cavity for molding the work of the casting mold In the state where the casting mold is tilted so that an inlet is provided, a gas vent hole is provided in the upper vertical direction on the other end side, and the other end side provided with the gas vent hole is vertically above the one end side. A casting method in which the molten metal is poured from the molten metal inlet and cast , and the casting mold is tilted and held from both sides, and the molten metal is injected from the molten metal inlet in the clamp holding state. Main features.

  According to the present invention, when pouring the molten metal from the molten metal inlet, gas is released from the gas vent hole provided at the end opposite to the molten metal inlet by tilting the casting mold. It is possible to suppress the generation of exhaust pressure in the interior and avoid application of pressure to the molten metal, and to prevent seizure below the cavity. Moreover, since the injected molten metal sequentially flows along the parallel arrangement direction with respect to the cavities as the gas is released, the molten metal is efficiently filled into the cavities, and casting is performed without causing seizure. be able to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an internal structural view of a casting mold 1 formed by a shell mold method according to an embodiment of the present invention. With this one casting mold 1, an engine camshaft 3 which is a long workpiece is erected. And casting in a state where a plurality (10 in this case) are arranged in parallel.

  The upper ends in the vertical direction of the cavities 5 for forming the camshafts 3 described above are communicated with a runner 7 extending in the left-right direction in FIG. The runner 7 extends in the left-right direction in FIG. 1 at the upper position in the vertical direction of the casting mold 1, and protrudes upward in the vertical direction of the casting mold 1 at a position corresponding to the left end thereof. A portion 9 is provided, and a spool 11 as a molten metal injection port is provided on the protruding portion 9.

  In addition, in the following description, when there is a description about the upper and lower sides such as the upper part and the lower part, the vertical direction is assumed unless otherwise specified.

  The inner shape of the spool 11 is tapered toward the lower side, and one end of the communication path 13 extending horizontally is connected to the side part on the lower side, and the other end of the communication path 13 is connected to the swirl 15. As shown in FIG. 2, which is a plan view of the casting mold 1 showing the peripheral portion of the spool 11 described above, the spool 11 has an elliptical opening portion and tapers from the elliptical opening portion toward the lower portion. An opening 11 a that communicates with the communication path 13 is provided on the side close to the communication path 13.

  The swirl 15 has a substantially cylindrical shape as a whole. The swirl 15 is connected to the upper end side of the swirl 15, and the molten metal introduced from the spool 11 through the communicating path 13 is swirled in a spiral shape, so that foreign matter (oxide) And alloy preparations for adjusting the ingredients.

The upper end of the scan word Lumpur 15 described above, is provided with a molten metal injection side vent holes 17. Further, the bottom of the scan word Lumpur 15 accommodates a filter (not shown) for foreign body capturing.

On the other hand, the lower portion of the scan word Lumpur 15 communicates the upper end of Hangaran'na 19. The hanger runner 19 has a function for hooking and transporting a cast product after molding by a transport hanger described later. Further, Hangaran'na 19 extends linearly to the vicinity of the lower end of the casting mold 1 is provided with a confining function initial dirty melt flowing from the scan word Lumpur 15.

And the neighboring scan word Lumpur 15 Hangaran'na 19 described above, and one end of the runner 7 described above, are communicated with each other by Yudoren passage 21. At this time, the runner 7, bottom and vertical position of the scan word Lumpur 15 is substantially equal, and therefore, Yudoren passage 21 is inclined so as to rise toward the runner 7 from Hangaran'na 19.

And the vent hole 23 is provided in the upper part of the other end side of the runway 7 provided with the above-mentioned swirl 15 at one end side.

  When the camshaft 3 is cast and molded using the casting mold 1 as described above, the casting mold 1 is conveyed along the conveyance line 25 shown in FIG. At this time, in addition to the casting mold 1 described above, various casting molds having shapes different from the casting mold 1 such as the casting mold 1A shown in FIG.

Casting mold 1A in FIG. 4 is for casting in a state of lying five camshaft 3 less than the casting mold 1 of FIG. 1 horizontally, molten metal is injected from the scan pool 11A is scan word Lumpur After flowing through the runner 7A extending vertically through 15A, it flows into each cavity 5A for molding the five camshafts 3A.

  In addition, the casting mold which flows through the conveyance line 25 is 4-6 types on an average including the casting mold 1A mentioned above, such as the casting mold 1A, and switches by the unit of 12-20 of one type.

  A transport rail 27 shown in FIG. 5 is provided over the entire length of the transport line 25, and a plurality of traveling carriages 29 serving as transport means travel on the transport rail 27 by a drive mechanism (not shown) while being connected to each other. On each traveling carriage 29, a mold carriage 31 as a transport carriage is installed, and various casting dies having a shape different from that of the casting mold 1 such as the casting mold 1 and the casting mold 1A are provided in the mold carriage 31 as 1 Two are mounted per mold carriage 31. However, it is assumed that two cast dies having the same shape are placed on one mold carriage 31.

  Next, the manufacturing process in the transfer line 25 shown in FIG. 3 will be described in order. In the following description, the casting mold 1 shown in FIG. 1 is used as the casting mold.

  Step A is a step of throwing the casting mold 1 into the mold carriage 31 from the outside of the transfer line 25, Step B is a step of tilting the casting mold 1 and Step C is a step of casting the casting mold 1 in the tilted state. The process of clamping and fixing above, the process D is fixing to inject the molten metal into the clamp mold 1 in the clamped state, the process E is the process of unclamping the casting mold 1 after the molten metal is injected, and the process F is unclamped. A step of extruding the casting mold 1 to the outside of the conveying line 25.

  FIG. 6 is a plan view showing the entire region extending from the mold charging process A to the clamping process E. The mold charging process A includes a mold charging device 33 on the side of the conveying line 25 and a casting mold 1 on the mold charging device 33. A mold conveying device 35 is provided for conveying each.

  FIG. 7 is a perspective view of the above-described mold feeding device 33 and the mold transport device 35 as seen from the mold transport device 35 side, and FIG. 8 is a side view thereof. The mold conveying device 35 is installed between the first roller conveyor 37 into which the casting mold 1 formed by the shell molding method in a mold molding process (not shown) is loaded, and between the first roller conveyor 37 and the mold feeding device 33. And a second roller conveyor 39 for receiving the casting mold 1 conveyed from the one-roller conveyor 37.

  In the first roller conveyor 37, a pair of roller support frames 37a installed on both sides rotatably support a plurality of power rollers 37b, and in the second roller conveyor 39, a pair of roller support frames 39a installed on both sides is provided. A plurality of power rollers 39b are rotatably supported. The first and first power rollers 37b and 39b are rotationally driven by a driving mechanism such as a motor (not shown).

  Although the second roller conveyor 39 is omitted in FIG. 7, it can be moved up and down by a lifting cylinder 41 provided at the lower portion as shown in FIG. 8 and is cast from the first roller conveyor 37. 1 is fed into the mold charging device 33.

  The mold feeding device 33 includes a mold housing frame 43 that houses two casting molds 1. The mold housing frame 43 can be rotationally displaced between a mold receiving posture shown in FIG. 8 and a mold loading posture shown by a solid line in FIG. The mold housing frame 43 includes mold guides 47, 49, 51 on both sides in the vertical direction and in the center of the bottom plate 45 in FIG.

  Each mold guide 47, 49, 51 has a pair of roller support frames 47a, 49a, 51a installed on both sides (both sides in the direction orthogonal to the paper surface in FIG. 8), and a plurality of free rollers 47b, 49b, Each 51b is rotatably supported.

  Then, in the mold receiving posture shown in FIG. 8, the mold feeding device 33 is cast from the second roller conveyor 39 between the mold guide 47 and the mold guide 51 and between the mold guide 49 and the mold guide 51. Accept 1 When the casting mold 1 is received, the casting roller 1 is moved from the second roller conveyor 39 to a height position corresponding to the mold feeding device 33 by driving the power roller 39b in the second roller conveyor 39. The free rollers 47b, 49b, 51b on the charging device 33 side are not driven to rotate, but are rotated by the movement of the casting mold 1 being fed.

  Although the above-described mold receiving frame 43 is omitted in FIG. 7, as shown in FIG. 8, the rotation cylinder 53 causes the mold receiving posture shown in FIG. 8 and the mold loading posture shown by the solid line in FIG. Rotating displacement. In the mold housing frame 43, the vicinity of the connection portion between the bottom plate 45 and the roller support frame 47a of the mold guide 47 and one end of the connecting link 55 are connected and fixed to each other by the connecting portion 56, while the other end of the connecting link 55, The tip of the piston rod 53a of the rotating cylinder 53 is connected to each other by a connecting shaft 58 so as to be rotatable.

The connection link 55 is rotatably supported by a rotation support portion (not shown) around a rotation center shaft portion 57 provided at the center in the longitudinal direction, and the base end portion of the rotation cylinder 53 is connected to the rotation support shaft. By 60, it supports to the rotation support part which is not shown in figure so that rotation is possible. From the state of FIG. 8, the piston rod 53a advances by driving the rotation cylinder 53, and the connecting link 55 rotates 90 degrees about the rotation center shaft portion 57, so that the mold housing frame 43 is viewed from the mold receiving posture. 7, and the casting mold 1 is displaced from the laid state to the standing state .

As shown in FIG. 7, the casting mold 1, when being conveyed by the first roller conveyor 37, the scan pool 11 and vent holes 23 in the traveling direction rear side, and scan pool 11 are set to be a side away from the transport line 25 than vent holes 23, casting mold 1 of the upstanding state, that these scan pools 11 and vent holes 23 are positioned vertically upper Become.

  In addition, as shown in FIG. 7, the mold loading device 33 has a pair of mold loading cylinders 59 installed on the side of the mold housing frame 43 opposite to the transfer line 25. The casting mold cylinder 59 includes a pressing plate 61 at the tip of the piston rod 59a. The casting mold 1 standing in the casting container frame 43 is pressed by the pressing plate 61 as shown in FIG. Is put on the mold carriage 31 shown in FIG.

  In addition, at the time of above-mentioned casting | molding, the traveling trolley | bogie 29 on the conveyance line 25 may be moving continuously, and may be once stopped. In the case of continuous movement, a driving device for moving the mold charging device 33 and the mold conveying device 35 in synchronization with the traveling carriage 29 is separately required. Regarding the movement of the traveling carriage 29 described above, it may be continuously moved in the subsequent steps, or may be temporarily stopped.

  Further, regarding the operation of the mold loading cylinder 59, it is not shown that the traveling carriage 29 (mold carriage 31) is located on the side of the mold feeding apparatus 33 in a state where the mold loading apparatus 33 is in the mold loading posture. What is necessary is just to carry out by detecting with a sensor. Alternatively, when the contact piece provided on the traveling carriage 29 comes into contact with a limit switch provided corresponding to the mold charging device 33 in the mold charging posture, the mold charging cylinder 59 may be operated.

  In the process B, the casting mold 1 that has been charged is tilted on the mold carriage 31. FIG. 9 shows the tilt cylinder 63 that constitutes the tilt drive means for tilting the casting mold 1 and each mechanism on the transport line 25 at the top thereof, and shows a traveling carriage 29 in the transport line 25. Suppose that it moves to the left direction shown by arrow G in the figure.

  A movable plate 65 is connected to the tip of the piston rod 63a protruding above the tilting cylinder 63, and the movable plate 65 moves up and down while being guided by a pair of guide rods 67 on both sides of the piston rod 63a. The guide rod 67 has an upper end fixed to the movable plate 65 and a lower end side inserted into the housing of the tilting cylinder 63 so as to be movable.

  A pair of pressing pins 69 as pressing members are provided on the upper surface of the movable plate 65 in the vicinity of both ends in the traveling direction of the traveling carriage 29 corresponding to the left and right direction in FIG. The pair of pressing pins 69 protrude upward through the gap between the pair of left and right transport rails 27, and further protrude upward from the state of FIG. 9 through the through holes 29a and 31a of the traveling carriage 29 and the mold carriage 31. .

  And these through-holes 29a and 31a are the positions corresponding to the casting mold 1 thrown on the mold carriage 31, and the end of the casting mold 1 on the side corresponding to the vent hole 23 shown in FIG. It is set to. Here, the casting mold 1 shown in FIG. 1 that simultaneously molds 10 camshafts 3 is the largest among various casting molds, and particularly has the longest length in the left-right direction in FIG. A small casting mold that is not required is in a state of being detached from the through holes 29 a and 31 a in a state of being put on the mold carriage 31.

  That is, when casting various molds onto the mold carriage 31, the end on the spool 11 side is positioned substantially at the same position as the mold entry side end of the mold carriage 31. Further, the casting mold 1A is configured such that the right end portion in FIG. 4 opposite to the spool 11A is not positioned on the through holes 29a and 31a. Accordingly, the tilting cylinder 63 can be operated every time the mold carriage 31 is conveyed regardless of the size of the casting mold.

  By raising the pressing pin 69 by driving the tilt cylinder 63 described above, the casting mold 1 is pushed upward toward the side corresponding to the gas vent hole 23, and the upper portion of the gas vent hole 23 as shown in FIG. 14 described later. The opening is inclined so as to be vertically above the upper opening of the spool 11.

  When the operation of tilting the casting mold 1 is performed in a state in which the traveling carriage 29 is continuously moved without being stopped, the tilting cylinder 63 is placed on the synchronous carriage 71 as shown in FIG. The synchronization carriage 71 is moved forward and backward by the synchronization cylinder 73.

  Next, the mold clamping step C will be described. FIG. 10A is a partially omitted perspective view showing the mold carriage 31 and a clamp actuating device 74 that operates when the two casting molds 1 tilted by the mold carriage 31 are clamped. 10 (b) is a front view of the mold carriage 31 and the clamp actuating device 74 as seen from before and after the mold conveying direction.

  As shown in FIG. 13 to be described later, the mold carriage 31 is provided with a pair of movable clamp plates 77 as clamp members on both sides of the upper surface of the bottom plate 75 in the mold conveying direction, and between the pair of movable clamp plates 77. A fixed clamp plate 79 is provided.

  The pair of movable clamp plate 77 and fixed clamp plate 79 include shaft mounting portions 77a and 79a that protrude upward, and the clamp plate guide shaft 81 is fixed to the central shaft mounting portion 79a, and the shaft mounting portions on both sides are fixed. 77a is supported so as to be movable in the axial direction with respect to both ends of the clamp plate guide shaft 81.

  A screw rod 83 is rotatably engaged with a boss portion 77b provided on the opposite side to the fixed clamp plate 79 of the pair of movable clamp plates 77, and an end portion on the opposite side of the boss portion 77b of the screw rod 83 is A cart-side gear 85 that rotates integrally with the screw rod 83 is fixed. The carriage side gear 85 is provided with a movement restricting portion (not shown) between the base plate 75 and the bottom plate 75 so as to restrict the approach and separation movement with respect to the movable clamp plate 77. The above-described screw rod 83 and a screw hole (not shown) provided in the boss portion 77a of the movable clamp plate 77 constitute a ball screw.

  That is, by rotating the screw rod 83 as the carriage side gear 85 rotates, the pair of movable clamp plates 77 move closer to the fixed clamp plate 79, and the casting mold 1 is moved to the movable clamp plate 77 and the fixed clamp plate 79. And clamp between.

  As shown in FIG. 10B, the clamp operating device 74 includes an operating device support post 87 erected on the left side of the transport line 25 in FIG. 10. A pair of actuating device support posts 87 is provided in a direction perpendicular to the plane of the drawing in FIG. 10, and a swing plate 91 is swingably supported on the upper end of the actuating device support post 87 via a swing support shaft 89. ing.

  The swing plate 91 projects the left end portion in FIG. 10B from the upper end of the actuator support post 87 to the side opposite to the transport line 25, and the swing cylinder 93 is formed at the end portion of the projecting portion 91a. The front end of the piston rod 93a is rotatably connected via a front end connecting pin 95. The base end portion of the swing cylinder 93 is rotatably supported by the actuator support post 87 via a base connecting pin 97.

  The front end side of the swing plate 91 protrudes to the opposite side of the actuator support post 87 with the transport line 25 interposed therebetween at a position above the transport line 25, and the above-described cart-side gear 85 is located in the middle thereof. The meshing drive side gear 99 is rotatably attached to a bracket 101 that protrudes downward from the vicinity of both side portions of the swing plate 91. In addition, a drive motor 103 is installed on the upper part of the swing plate 91, and the drive motor 103 and the drive side gear 99 are interlocked and connected to each other by a toothed belt 105.

  Then, an oscillating plate support post 107 is erected on the opposite side of the actuator support post 87 with the conveyance line 25 interposed therebetween, and the oscillating plate 91 is set in a horizontal state as shown by a solid line in FIG. When this occurs, the tip of the abutment comes into contact with the upper end of the swinging plate support post 107, and at this time, the drive side gear 99 meshes with the carriage side gear 85. In this meshing state, the casting mold 1 is clamped and fixed between the movable clamp plate 77 and the fixed clamp plate 79 as described above by rotating the cart side gear 85 with the rotation of the drive side gear 99. become.

  When the oscillating cylinder 93 is driven backward from the state shown by the solid line in FIG. 10, the drive side gear 99 is separated from the carriage side gear 85 as shown by the two-dot chain line, and the meshing state between the two is released. The

  Note that the clamping operation by the clamp operation device 74 described above is also performed when the traveling carriage 29 is continuously moved, and the entire clamp operation device 74 including the operation device support post 87 and the swing plate support post 107 is used. A mechanism similar to that of the synchronous cylinder 73 shown in FIG. 9 is used to move in synchronization with the conveyance of the casting mold 1.

  Further, since this clamping work is performed in a state where the casting mold 1 in FIG. 9 is tilted, the clamping actuator 74 and the tilting driving mechanism including the tilting cylinder 63 are arranged on the transport line 25. It shall be operated at the same position in the transport direction.

As shown in FIG. 11, the process D for injecting the molten metal is performed manually by the operator 109 using the pouring vessel 111 holding the molten metal. The pouring container 111 is supported by a support frame 115 suspended from a ceiling (not shown) via a support wire 113 so that the side portion can rotate, and an operator rotates an operation handle 117 provided on the support frame 115. , tilt pouring vessel 111 gradually, to inject the molten metal into the scan pool 11 of casting mold 1 from the pouring port 111a.

  Also in the case of performing this pouring operation in a state where the traveling carriage 29 continuously moves, the pouring container 111 suspended through the support wire 113 is traveled along a guide rail (not shown) provided on the ceiling. What is necessary is just to make it move synchronizing with the trolley | bogie 29. FIG.

  In the next step E, the operation of unclamping the casting mold 1 in the clamped state is performed by rotating the carriage side gear 85 in the reverse direction by a mechanism similar to the clamp operating device 74 shown in FIG. 77 is moved away from the fixed clamp plate 79, and the casting mold 1 is unclamped. By this unclamping, the casting mold 1 returns to a horizontal state before being tilted by its own weight.

  The process F for extruding the casting mold 1 located downstream of the unclamping operation includes an extrusion device 119 shown in FIG. The extrusion device 119 includes a pair of mold extrusion cylinders 121 similar to the mold injection cylinder 59 shown in FIG. 7 and a push plate 123 at the tip of the piston rod 121a. The mold 1 is pressed from the push plate 123 and discharged to the outside of the transport line 25.

  Next, the operation will be described. First, in the mold charging step A, as shown in FIG. 8, the first roller conveyor 37 is shown by a solid line in a state where the cast mold 1 is lowered to the same height position as the first roller conveyor 37. The sheet is conveyed to the two-roller conveyor 39 and further transferred to the lower mold guide 47 in FIG. 8 of the mold feeding apparatus 33 in the mold receiving posture by driving the second roller conveyor 39.

  Subsequently, when the other casting mold 1 thrown into the first roller conveyor 37 is transported to the second roller conveyor 39, the driving of the first and second roller conveyors 37 and 39 is temporarily stopped, and in this state, for raising and lowering The cylinder 41 is driven forward, and the second roller conveyor 39 rises to a position indicated by a two-dot chain line having the same height as the intermediate mold guide 51.

  Then, the driving is resumed with the second roller conveyor 39 raised to the above position, and the casting mold 1 is transferred onto the mold guide 51. As a result, the mold casting apparatus 33 accommodates the two casting molds 1.

  When the rotating cylinder 53 is driven forward in this state, the mold charging device 33 rotates 90 degrees clockwise in FIG. 8 from the state of FIG. 8 and is displaced to the mold charging posture shown by the solid line in FIG. Thereafter, the mold casting cylinder 59 shown in FIG. 7 is driven forward, whereby the two casting molds 1 are loaded into the mold carriage 31 on the transfer line 25. FIG. 13A shows a process in which two casting molds 1 are thrown into the mold carriage 31, and FIG. 13B shows a state after the filling is completed.

As shown in FIG. 13B, the casting mold 1 introduced into the mold carriage 31 is driven forward by the tilting cylinder 63 shown in FIG. end of the vent holes 23 side, so that the vertical direction above the end of the scan pool 11 side, tilting the casting mold 1.

  FIG. 14A shows a state in which the casting mold 1 is tilted. FIG. 14B schematically shows a state where the casting mold 1 on the mold carriage 31 is inclined by being pressed by the pressing pin 69.

  With the casting mold 1 tilted as shown in FIGS. 14 (a) and 14 (b), the clamp operating device 74 shown in FIG. 10 is operated to drive the drive side gear 99, and the carriage side gear 85 as shown by the solid line in the figure. To mesh. By driving the drive motor 103 in this meshing state, the carriage-side gear 85 is rotated via the drive-side gear 99, and the screw rod 83 is rotated together with this, and the movable clamp plate 77 is moved to move the fixed clamp plate 79. The casting mold 1 is clamped between.

  After the clamp is fixed, the pressing pin 69 is retracted as shown in FIG. 14C. At this time, the casting mold 1 is tilted because it is clamped between the movable clamp plate 77 and the fixed clamp plate 79. It remains.

In step D injecting the next molten metal, as shown in FIG. 11, the worker 109, tilting the molten metal container 111, injecting molten metal into scan pool 11 of casting mold 1 from the pouring port 111a.

Scan flops over the molten metal injected from the Le 11, the swirl 15 from the communication passage 13 in the casting mold 1 shown in FIG. 1, Hangaran'na 19, reaches the runner 7 via the Yudoren passage 21. Molten metal reaches the runners 7, while flowing toward the end of the scan pool 11 opposite the gas vent hole 23 side, sequentially enters the cavity 5 in the middle.

At this time, by the casting mold 1 is inclined, since the vent holes 23 side with respect to the runner 7 also scan pool 11 side is inclined so as to be vertically above, it enters into the casting mold 1 (involving I) gas, this inclination to move toward the end of the upper i.e. scan pool 11 opposite the gas vent hole 23 side, is released to the outside from the vent holes 23.

Therefore, when injecting the molten metal from the scan pool 11, it is possible to suppress the occurrence of exhaust pressure due to the presence of gas in the casting mold 1, it is possible to avoid pressure application to the melt, the lower cavity 5 Burn-in can be prevented. Further, since the molten metal injected into the casting mold 1 sequentially flows efficiently along the parallel arrangement direction with respect to the plurality of cavities 5 as the gas is released from the gas vent holes 23, each cavity 5. The molten metal is efficiently filled, and casting defects such as seizure can be prevented.

  Moreover, the molten metal introduced into the swirl 15 from the spool 11 via the communication path 13 swirls in a spiral shape, and foreign matter in the molten metal is lifted, and a filter is provided at the lower part of the swirl 15, so that the foreign matter in the molten metal is in the cavity. 5 does not flow to the side, and it is possible to prevent foreign matter biting defects in the cast product.

  In the next step E, the cart side gear 85 of the mold cart 31 is rotated in the opposite direction to that at the time of clamping as shown in FIG. 15A by a mechanism (not shown) similar to the clamp operating device 74 of FIG. Mold 1 is unclamped. When the casting mold 1 is unclamped and released, the casting mold 1 returns to the horizontal state as shown in FIG. 15B due to its own weight. Thereafter, the casting mold 1 is conveyed by the extrusion device 119 shown in FIG. It pushes out of the line 25 and is discharged.

  After the discharge, the casting mold 1 is lifted by an operator using an assisting device (not shown) in the state where the molten metal is cooled and solidified, the casting mold 1 is broken by hammering, and the cast product inside is taken out. A casting hanger corresponding to the vicinity of the runner communication path 21 connecting the hanger runner 19 and the runner 7 shown in FIG. 1 is hooked by a transport hanger (not shown), and the plurality of camshafts 3 are moved to the next work process (not shown). Convey the castings to be provided.

As described above, in the present embodiment, when injecting the molten metal from the scan pool 11 of casting mold 1 will release gas from the gas vent hole 23, to prevent casting defects, such as burn, high A quality casting can be obtained. At this time, the casting mold 1 may be clamped and held in a tilted state, and the tilting drive mechanism including the tilting cylinder 63 for tilting can be cast even for a small casting mold that does not need to be tilted. Even if it is operated in the same manner as the mold 1, it does not tilt, and therefore there is no need for ancillary equipment such as a complicated detection device corresponding only to the large casting mold 1, and it is only necessary to provide a drive mechanism for tilting. Therefore, casting defects can be prevented at low cost.

It is an internal structure figure of the casting die concerning one embodiment of the present invention. It is a top view which shows the molten metal injection hole periphery of the casting mold of FIG. It is a whole block diagram of the conveyance line which conveys the casting mold of FIG. 1 along a work process. It is an internal structure figure of another small casting mold. It is a side view which shows the traveling trolley and mold trolley | bogie on a conveyance rail in the conveyance line of FIG. It is a top view which shows the whole area | region ranging from the casting_mold | injection process to the clamping process in the conveyance line of FIG. FIG. 7 is a perspective view of a mold feeding device and a mold transporting device in the mold feeding process of FIG. 6. FIG. 7 is a side view of a mold feeding device and a mold transporting device in the mold feeding process of FIG. 6. It is explanatory drawing which simplifies and shows each mechanism on the inclination cylinder for inclining a casting mold, and the conveyance line of the upper part. (A) is the perspective view which abbreviate | omitted partially the clamp operation | movement apparatus which operate | moves when clamping a mold trolley | bogie and two casting molds, (b) is seen from the mold conveyance direction of the mold trolley and the clamp operation device from the front and back of the mold conveyance direction FIG. It is a perspective view which shows the state which the operator has inject | poured the molten metal into the casting mold with the pouring container. It is a perspective view which shows the operation | work which extrudes a casting mold outside from a conveyance line. (A) is operation | movement explanatory drawing which shows the process in which two casting molds are thrown into a mold trolley | bogie, (b) is operation | movement explanatory drawing which shows the state after completion | finish of injection | pouring. (A) is operation | movement explanatory drawing which shows the state which inclined the casting mold, (b) is operation | movement explanatory drawing which shows typically the state which the casting mold on the mold trolley pressed and pressed by the press pin, (c) ) Is an operation explanatory view schematically showing a state in which the pressing pin is retracted. (A) is operation | movement explanatory drawing which shows the state which unclamps a casting mold | die, (b) is operation | movement explanatory drawing which shows the state which the casting mold | die returned to the horizontal by dead weight after unclamping.

Explanation of symbols

1 Casting mold 3 Camshaft (work)
5 Cavity 7 Runway 11 Swirl (melt inlet)
23 Degassing hole 29 Traveling carriage (conveyance means)
31 Mold cart (conveyance cart)
63 Inclination cylinder (Inclination drive means)
69 Pressing pin (Pressing member)
77 Movable clamp plate (clamp member)

Claims (9)

When casting using one of the casting mold in a state where the word click was the allowed and in parallel a plurality placed upright, the molten metal inlet disposed in a vertically upper part of the parallel arrangement direction one end side of the cavity for molding the work of the casting mold In the state where the casting mold is tilted so that a gas vent hole is provided in the upper part in the vertical direction on the other end side, and the other end side provided with the gas vent hole is vertically upward with respect to the one end side. A casting method for casting by injecting molten metal from an inlet , wherein the casting mold is tilted and held from both sides, and the molten metal is injected from the molten metal inlet in the clamp holding state. .   The upper ends in the vertical direction of the plurality of cavities forming the workpiece are communicated with a runner, and the vent hole is provided on the other end of the runner corresponding to the other end in the parallel arrangement direction of the cavities. 2. The casting method according to claim 1, wherein casting is performed by injecting molten metal from the molten metal inlet provided on one end side of the road.   In the casting mold, the molten metal is injected in a state of being inclined on a conveying line that is sequentially conveyed together with other casting molds having different shapes by the conveying means, and only the casting mold provided with the gas vent hole is inclined in the conveying process. The casting method according to claim 1 or 2, characterized in that: In casting apparatus for casting using a single casting mold the word click in the state where the allowed and in parallel a plurality placed upright, the molten metal inlet in the vertical direction the upper part of the parallel arrangement direction one end side of the cavity for molding the work of the casting mold Provided with a tilting drive means for tilting the casting mold so that a gas vent hole is provided in the upper vertical direction on the other end side, and the other end side provided with the gas vent hole is vertically above the one end side , A casting apparatus comprising a clamp member that clamps and holds the casting mold tilted by the tilt driving means from both sides . The upper ends in the vertical direction of a plurality of cavities forming the workpiece of the casting mold are connected to each other by a runner, and the melt inlet is provided at one end of the runner, while the gas is provided at the other end of the runner. The casting apparatus according to claim 4 , wherein a punching hole is provided. The said inclination drive means is provided with the press member which moves forward from the perpendicular direction lower direction of the said casting mold toward the upper direction, and pushes up the edge part of the said casting mold, The Claim 4 or 5 characterized by the above-mentioned. Casting equipment. A conveying line for injecting the molten metal in a tilted state is provided while the casting mold is sequentially conveyed together with other casting molds having different shapes by the conveying means, and the tilt driving means is provided with the gas vent hole in the conveying process by the conveying means. The casting apparatus according to any one of claims 4 to 6 , wherein the casting apparatus is provided at a position where only a casting mold provided with a tilt is inclined. The transport carriage for transporting put the casting mold is provided, said clamp member, to 4 claims, characterized in that said a provided on the conveyance carriage accessible away moved from both sides with respect to the casting mold 8. The casting apparatus according to any one of items 7 . A screw rod is rotatably inserted into a screw hole provided in the clamp member to constitute a ball screw, and a carriage-side gear that rotates integrally with the screw rod is provided in the conveyance carriage, and a drive side with respect to the carriage-side gear is provided. gear, the state of meshing, so that any state of a state of disengagement, according to claim 8, characterized in that the drive-side gear was accessible away movement relative to the carriage gear Casting equipment.

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