JPH0560653U - Core loader / product takeout device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a device having a simple structure and having both a core insertion function and a product removal function. [Structure] A support board 41 is provided which is driven to move back and forth between the open upper and lower molds 7 and 8 and the outside of the machine.
A first elevating cylinder 50 with a piston rod 54 facing downward is provided on the support board 41 so that the cylinder portion is raised after the working end of the piston rod 54 lands.
The second lifting cylinder 47 was supported on the cylinder portion of the first lifting cylinder 50, and the substrate 42 was fixed to the upward working end of the piston rod 48. On the substrate 42, there is provided a holding cylinder 64 on which the core set 70 which can be inserted into the upper mold 7 by moving up and down in the upper mold 7 by its ascent and descent can be mounted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a core loader / product take-out device having both a function of inserting a core set into a die of a casting machine such as a die casting machine and a function of taking out a product from the die.

[0002]

[Prior Art]

 Generally, when casting an engine block, for example, with a casting machine such as a die casting machine, the collapsible sand core and the sand core are held in the mold of the mold opening / closing unit located at the product take-out station. Insert a core set consisting of a mandrel, etc. with a core loader, perform temporary mold clamping, then move the mold opening / closing unit to the mold clamping and injection station for main mold clamping. After the mold is clamped, the molten metal is injected into the mold cavity, and after the molten metal has solidified, the main mold is released and the mold opening / closing unit is moved to the product unloading station, the mold is opened and the product is taken out of the machine. After taking out, one casting cycle is completed by cleaning the inside of the die or applying a release agent inside the die.

In the die-casting machine that operates as described above, the conventional core loader that inserts the core set into the mold has a long-stroke insertion cylinder that is horizontally supported by the frame of the product take-out station. At the working end of the piston rod, a holder for holding the core set is provided.The core set is placed on the holder to move the piston rod of the insertion cylinder forward and backward, and It is configured to insert the core set by inserting the holding table into the center of the mold.

Further, a conventional product take-out device for taking out a cast product from a mold includes a take-out cylinder having a long stroke, which is horizontally supported by a frame of the product take-out station, and has a piston rod A chuck for product holding is provided at the working end.The piston rod of the unloading cylinder is advanced to enter the chuck into the center of the open mold, and the product is held by opening and closing the chuck. The piston rod is retracted to take out the product.

[0005]

[Problems to be solved by the device]

 However, since the conventional core loader does not have a product unloading function and a product unloading device with a complicated structure is provided separately from the core loader, the overall structure of the casting machine is complicated and the number of parts increases, so Not only can it not be provided at a low price, but there is also the problem that automation of the casting equipment is hindered.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a core loader / product unloading device having a simple structure having both a function as a core loader and a product unloading function. ..

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, in the present invention, a support board that is driven to move back and forth between the upper and lower open molds and the outside of the machine, and the working end of the piston rod are mounted on this support board. A plurality of first elevating cylinders which are supported downward and land a piston rod while descending to raise a cylinder portion; and a second elevating cylinder which is supported on the cylinder portion side with the working end of the piston rod facing upward. , A horizontal substrate fixed to the working end of the piston rod of the second elevating cylinder, and a substrate fixed on this substrate that moves up and down into the cavity of the upper mold to insert it into the mold on the upper surface. A core and product receiver are provided on which the core set can be placed.

[0008]

[Action]

 The core set is placed on the core / product receiver on the board, and the entire system is moved between the open upper and lower molds, and then the piston rod of the first lifting cylinder is lowered. After the landing of the moth, the piston rod stands still and the cylinder portion rises, and the base plate and the second elevating cylinder integral therewith rise. When raised to a predetermined position, the cylinder portion of the first elevating cylinder stops and only the piston rod of the second cylinder moves up to a predetermined position with the substrate, and the core set is inserted into the mold. After insertion, the board descends in the reverse operation of the previous step, then the entire device moves out of the machine, and the mold is clamped and ejected.

After the molten metal in the cavity is solidified, the mold is opened, and the device is advanced to lower the piston rod of the first elevating cylinder. After the working end of the piston rod is landed, the piston rod remains stationary. Then, the cylinder portion rises, and the substrate and the second elevating cylinder integrated therewith rise. When they rise to a predetermined position, they stop and the product is held on the pedestal. Therefore, after the substrate descends in the reverse operation, the entire device moves out of the machine and the product is taken out.

[0010]

【Example】

 This embodiment shows an example in which the present invention is applied to an automatic casting device for engine blocks. Fig. 1 is a front view of a product take-out device, Fig. 2 is a side view of the same, Fig. 3 is a plan view of the product, and Fig. 4 is a core. 5 is a front view of the insertion portion, FIG. 5 is a side view of the core insertion portion, FIG. 6 is a plan view of the core insertion tip portion, FIG. 7 is an enlarged plan view of the same, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 9 is a perspective view of the mandrel and its holding portion, FIG. 10 is a perspective view of the mandrel and its holding portion as seen from a direction orthogonal to FIG. 9, and FIG. 11 is a longitudinal sectional view of the product before the mandrel is removed. 12 is a schematic plan view of an automatic casting apparatus embodying the present invention.

In FIG. 12, reference numeral 1 denotes a vertical die clamping die casting machine, which is a die 2 which is clamped and opened by a die clamping cylinder (not shown) and a die 2 which faces the cavity. The die cast machine 1 is provided with a plurality of core cylinders 3 for advancing and retracting the core, and a core set for supplying a core set including sand cores 4 and the like described later into the mold cavity. A core loader equipped with a set insertion function and a product take-out function for taking out a product 6 from the opened mold 2 and an engine block in this embodiment to the outside of the machine. A product take-out device 5 (detailed later) is attached. Has been done.

Here, a mold and a product will be described with reference to FIG. In the product 6, the molten metal injected into the cavity 10 surrounded by the upper mold 7, the lower mold 8 and the slide core 9 which compose the mold 2 of the die casting machine 1 in FIG. 12 is solidified. A cylindrical sleeve 11 is provided at the center of the cavity 10 by being fitted to a cylindrical mandrel 12 with a collar, and is formed into a cylindrical shape. The sand core 4 having the above is positioned outside the sleeve 11 and is held by the collar portion of the mandrel 12. By doing so, the molten metal is injected into the cavity 10 to solidify, then the mold is opened, and the sand core 4 is disintegrated and taken out from the lower mold 8. Since the space part which becomes the cooling jacket is formed by taking out 4, the product 6 is obtained by subsequently removing the mandrel 12.

Further, in general, when casting an engine block or the like with the die casting machine 1 or the like, flashing occurs from the joining surface between the upper die 7 and the lower die 8 or a runner that is a passage for molten metal is used. Since the solidified material in the gate is attached to the cast product and taken out, a trimming press 13 for removing this surplus material is provided in the vicinity of the die casting machine 1 in this device. 13 also has a function of pulling out the mandrel 12 from the product 6. That is, the trimming press 13 provided in the vicinity of the die casting machine 1 is provided with an upper fixed plate 14 whose four corners are connected by tie rods and a lower fixed plate (not shown), and the upper fixed plate 14 and the lower fixed plate. A movable plate that is driven by the mold clamping cylinder 15 and moves up and down along the tie rods is provided between them.

A trimming upper die is fixed to the lower surface of the movable platen, and a mandrel removing upper die equipped with a mandrel removing jig is capable of moving back and forth horizontally between the lower side of the movable platen and the outside of the machine. The trimming lower mold 17 and the mandrel lowering mold 18 which are connected to each other by connecting metal fittings allow the wheels to roll on the two rails 16 which are provided on the floor via the base. It is provided to be engaged. The piston rod of the hydraulic cylinder 19 is connected to the trimming lower die 17, and by moving the piston rod of the hydraulic cylinder 19 forward and backward, either the trimming lower die 17 or the mandrel removal lower die 18 is moved. Is configured to selectively enter directly under the trimming upper mold. By doing so, the trimming lower die 17 is advanced to the position right below the trimming upper die, the product 6 is placed thereon, and the trimming upper die is lowered, whereby trimming is performed. In addition, the mandrel lower die is moved under the mandrel upper die that has entered, the product 6 is placed on the lower mandrel upper die, and the mandrel removing jig is lowered together with the mandrel upper die, so that the mandrel is removed. ing.

In the trimming work and the mandrel removing work, due to the nature of the work, the mounting direction of the product 6 on the lower molds 17 and 18 is upside down, and the product 6 is placed between these steps. Since it has to be turned upside down by 180 °, a conveyance reversing device 20 for conveying and reversing the product 6 is provided between the die casting machine 1 and the trimming press 13. That is, on both sides of the product 6 taken out from the die-casting machine 1, two pairs of horizontal guide rails 21 are arranged between the side of the die-casting machine 1 and the trimming press 13 on each side. A guide 22 vertically connected by a connecting plate is slidably fitted to the guide rail 21.

A case 23 is rotatably supported by the upper and lower guides 22 via a rotary actuator for reversal (not shown) and a bearing 24. By operating the rotary actuator, the case 23 is It is configured to rotate 180 ° in the forward and reverse directions. Inside the case 23, a chuck that is opened and closed by a cylinder (not shown) is provided. As a result, the product 6 taken out from the die casting machine 1 and gripped by the chuck is conveyed by being driven by a telescope type traveling cylinder (not shown), and is vertically mounted on the trimming lower die 17 or the mandrel lower die 18. It is configured to be supplied in a state or an inverted state, respectively.

On the other hand, a mandrel recovery device 30 is provided near the trimming press 13. That is, between the lower part of the lower mandrel removing mold and the position outside the machine, two guide rails 31 are laid in a direction perpendicular to the feeding and supplying direction of the product 6 to the trimming press 13. Each of these guide rails 31 is fitted with a mandrel holder 33 which has four mandrel holders 32 and which is driven by a traverse cylinder (not shown) to move forward and backward in the horizontal direction. In this way, the mandrel 12 is received by the mandrel receiver 32 which is moved up and down by a lifting cylinder (not shown) under the mandrel lowering die, and the mandrel 12 is moved out of the machine by the movement of the mandrel holder 33. ..

Reference numeral 34 is a deburring and cleaning device provided with a brush that is rotated by a motor, and a robot 35 is arranged in the vicinity thereof, and the robot 35 deburrs from the mandrel holder 33. The mandrel 12 transported to the cleaning device is configured to be cleaned by a brush and then transported to the mandrel storage space 36 by the robot 35.

Therefore, the core loader / product take-out device 5 according to the present invention (hereinafter referred to as the core loader 5) will be described in detail with reference to FIGS. 1 to 10. The core loader 5 includes a frame (not shown) fixed on the floor and a frame, and a loader 40 that is supported on the frame so as to move back and forth and is driven by a chain drive device to move forward and backward in the horizontal direction. By advancing and retracting, the entire core loader main body fixed to the tip of the core is configured to enter between the upper and lower molds 7 and 8 which are open vertically and to retreat to the position outside the machine. There is.

The core loader main body includes a support board 41 fixed to the loader 40 and having a substantially square shape in a plan view, and sleeve holes 41 a are provided at four corners of the support board 41. Reference numeral 42 denotes a substrate formed in a substantially square shape by a plate material. The tubular guide shafts 43 having the bases fixed respectively at the four corners and hanging down are fitted into the sleeve holes 41a to form upper ends. A guide tube 45 whose parts are integrally connected by a connecting plate 44 is fitted so as to be movable up and down.

A metal fitting 46 is fixed to the central portion of the lower surface of the base plate 42. The metal fitting 46 has a cylinder portion slidably fitted in a central hole of the support board 41 so that the connecting plate 44 is connected. It is fixed to the working end of the piston rod 48 of the second lifting cylinder 47 which is fixed to. A bracket 49 is fixed to the upper end of each of the four guide tubes 45 connected by the connecting plate 44, and a first elevating cylinder 50 is fixed to each of the brackets 49 with its base fixed. Has been done.

Further, brackets 51 are fixed to the four corners of the lower end of the support board, and a guide tube 53 whose lower end is connected by a connecting plate 52 is attached to each of the brackets 51. It is fixed concentrically with. As shown in FIG. 4, the piston rod 54 of the first elevating cylinder 50 is fixed with a guide pin 56 slidably fitted to the inner hole of the guide cylinder 53 via an oiles bush 55. An adjusting bolt 57 is adjustably screwed into the screw hole of the guide pin 56 and is fixed by a double nut 58.

By doing so, when the piston rod 54 of the first elevating cylinder 50 advances, the adjusting bolt 57 descends via the guide pin 56, and until the adjusting bolt 57 abuts the lower mold 8, Although the lifting cylinder 50 is stationary and the adjusting bolt 57 is lowered, after the adjusting bolt 57 contacts the lower mold 8, the adjusting bolt 57 is stopped and the cylinder portion of the first lifting cylinder 50 is raised. Is configured. Further, the second elevating cylinder 47 moves up integrally with the cylinder part of the first elevating cylinder 50, and then operates when the first elevating cylinder 50 rises to a predetermined position and stops, and then the piston rod 48. It is configured to raise the substrate 42 via the metal fitting 46.

As shown in detail in FIGS. 6 to 10, on the substrate 42, a support base 60 for supporting the product 6 and a core set 70 including a sand core 4, a mandrel 10 and a sleeve 11. Is fixed. The support base 60 is provided with a fixing plate 61 which is formed in a horizontally long rectangular shape in a plan view and has a U-shaped cross section, and is screwed to the substrate 42. The fixing plate 61 includes the fixing plate 61 shown in FIGS. A kamaboko-shaped positioning table 62 that is fitted to the inverted U-shaped positioning portion 6a of the product 6 shown in FIG. Then, by loosening and moving the adjusting bolts 63 screwed into the screw holes at the four corners of the positioning base 62, the positioning base 62 can be moved and adjusted in each horizontal direction.

On the positioning table 62, four holding members formed in a bottomed cylindrical shape by a cylindrical member 64a and a holding member 64b so as to engage with the cylindrical cylinder portion 6b of the product 6 shown in FIG. The cylinder 64 is fixed by an adjusting bolt 65 screwed into the screw hole of the positioning base 62, and the holding member 64b can be moved and adjusted in each horizontal direction by loosening the adjusting bolt 65. .. The holding cylinder 64 is configured to move upward when the product 6 is taken out, hold the product 6 while the positioning base 62 and the positioning portion 6a are fitted and positioned, and take the product 6 out of the machine.

A rod-shaped striker 66 is supported at the center of the holding cylinder 64 so as to be able to move up and down, and the striker 66 projects upward from the upper plate of the holding cylinder 64 between the flange 66 a and the positioning base 62. A compression coil spring 67 that biases the compression coil spring 67 is interposed.

The inclined surface formed on the protruding portion of the striker 66 protruding downward from the hole of the positioning base 62 and the fixed plate 61 corresponds to the contact point of the limit switch 68 mounted on the back surface of the substrate 42. There is. By doing so, the striker 66 projects upward due to the elastic force of the compression coil spring 67 in normal times, but the striker 66 is pushed against the elastic force of the compression coil spring 67 at the upper limit of the holding cylinder 64. And the striker 66 is configured to close the contact of the limit switch 68.

The core loader 5 having such a product take-out function also has a function of inserting the core set 70 including the sand core 4, the sleeve 11 and the mandrel 12 shown in FIG. 11 into the molds 7 and 8. ing. That is, in FIG. 10, a robot 71 and a core storage area 72 are arranged near the core loader 5, and the core set 70 accumulated in the core storage area 72 is moved to the outside position by the robot 71. It is configured to be supplied onto the holding cylinder 64 fixed on the support base 60 of the stopped core loader 5. FIG. 5 shows a state in which the core set 70 is supplied onto the holding cylinder 64. The supplied core set 70 is moved to the raised position by the holding cylinder 64 which is lifted by the operation of the lifting cylinders 47 and 53. It is configured to be inserted into a predetermined position in the upper mold 7 stopped at. Further, the lift cylinders 47, 53 are provided with limit switches (not shown) for stopping them at predetermined positions.

Here, the holding structure of the core set 70 by the holding cylinder 64 will be described. That is, in FIGS. 9 and 10, the holding member 64b of the holding cylinder 64 is formed in an oval shape, and trapezoidal notches 64c are provided in the center of the straight portions on both sides of the holding member 64b. A trapezoidal protrusion 12a that engages with each of the notches 64c is provided at the lower end portion of the mandrel 12 that constitutes 70. By doing so, the core set 70 conveyed by the robot 71 is configured to be held by the holding cylinder 64 while the projection 12a and the notch 64c are engaged with each other.

Further, as shown in FIGS. 2 and 5, an air cylinder 73 is pivotally attached to the fixed portion of the core loader 5, and the working end of the piston rod 74 thereof is also pivotally attached to the fixed portion side. The lever 75 is pivotally attached to the free end portion of the lever 75, and is configured such that the lever 75 stands up and falls when the piston rod 74 moves back and forth. By doing so, the lever 75 stands up when the product 6 is held and the holding cylinder 64 descends, and the collapse of the sand core 4 is stopped when the lever 75 suddenly stops. In FIG. 3, 76 is a biscuit formed by solidifying the molten metal in the sleeve, and 77 is a solidified product of the molten metal solidified in the gate connecting the sleeve and the cavity.

The casting operation of the engine block by the automatic casting apparatus configured as described above will be described. First, the robot 71 operates to hold the core set 70 including the sleeve 11, the sand core 4 and the mandrel 12 accumulated on the core storage 72, and the held core set 70 is located outside the machine. It is supplied while engaging the projections 12a and the notches 64c on the four holding cylinders 64 fixed on the support base 60 of the core loader 5 stopped at. At this time, the upper and lower molds 7 and 8 are open, and when the loader 40 is moved forward by the driving device, the support board 41 and the entire device held by the support plate 41 enter between the open upper and lower molds 7 and 8. ..

At this time, when the piston rod 54 of the first elevating cylinder 50 advances, the adjusting bolt 57 descends via the guide pin 56, and until the adjusting bolt 57 lands on the lower die 8, the first elevating cylinder 50 moves. Is stationary and the adjusting bolt 57 is lowered. Then, when the adjusting bolt 57 lands on the lower die 8, the adjusting bolt 57 stops and the cylinder portion of the first elevating cylinder 50 rises, and the base plate 42 and the second elevating cylinder 47 integrated with the adjusting bolt 57 rise. Rises. When raised to a predetermined position, the cylinder portion of the first elevating cylinder 50 stops and only the piston rod 48 of the second cylinder 47 moves up to a predetermined position with the substrate 42, and the core set 70 moves the upper mold 7 Inserted inside.

Therefore, the substrate 42 and the entire device mounted on the substrate 42 are lowered by a reverse operation to the above, and the loader 40 is retracted to withdraw the entire device out of the machine. Then, after lowering the upper mold 7 and clamping the mold, the molten metal is injected into the mold cavity 10, and when this molten metal is solidified, a product 6 in which the core set 70 is inserted is obtained. Therefore, when the upper mold 7 is lifted to open the mold, the product 6 is held on the upper mold 7 side and lifted.

Next, when the piston rod 54 of the first elevating cylinder 50 advances, the adjusting bolt 57 descends via the guide pin 56, and the first elevating cylinder 50 moves until the adjusting bolt 57 lands on the lower die 8. While still, the adjustment bolt 57 descends. Then, when the adjusting bolt 57 lands on the lower die 8, the adjusting bolt 57 stands still and the cylinder portion of the first elevating cylinder 50 rises, and the base plate 42 and the second elevating cylinder 47 integral therewith rise. To do. When the product 6 is lifted to a predetermined height and stopped, the product 6 is held by the holding cylinder 64 of the core loader 5. Therefore, after the substrate 42 and the holding cylinder 64 mounted on the substrate 42 are lowered in the reverse operation to the above, The product 6 is taken out of the machine by retracting the loader 40 and moving the entire apparatus out of the machine.

In FIG. 12, the product 6 taken out of the machine is grasped by a chuck in a case 23 provided in the conveyance reversing device 20, and conveyed to the trimming press 13 along the guide rail 22. The conveyed product 6 is supplied to the trimming lower die 17 or the mandrel removing lower die 18 in an upright state or an inverted state, respectively, and the conveyed product 6 is moved by the trimming press 13 between the lower die 17 and 18. By lowering the upper mold and reversing the product 6 by the conveyance reversing device 20, a trimming operation for removing the surplus material and a mandrel removing work for removing the mandrel 12 are performed.

The removed mandrel 12 is deburred and cleaned by a deburring / cleaning device 34 provided in the mandrel collecting device 30 near the trimming press 13, and is then conveyed to a mandrel storage space 36 by a robot 35 and accumulated there. It

In this embodiment, an example in which the core loader / product take-out device according to the present invention is applied to an automatic casting device is shown, but the same applies to an ordinary die casting machine or a die casting machine equipped with a mold opening / closing unit. The same effect can be obtained. Further, in the present embodiment, since the adjusting bolt 63 and the adjusting bolt 65 are separately provided, the positioning of the core set 70 and the positioning of the product receiving portion can be performed separately, which facilitates the positioning.

[0038]

[Effect of the device]

 As is apparent from the above description, according to the present invention, in the core loader / product take-out device, the support board driven forward and backward so as to move between the open upper and lower molds and the outside of the machine, A plurality of first elevating cylinders which are supported on the support board with the working end of the piston rod facing downward and land the piston rod on the way down to raise the cylinder portion, and the working end of the piston rod is raised to the cylinder portion side. A second elevating cylinder supported toward the second elevating cylinder, a horizontal substrate fixed to the working end of the piston rod of the second elevating cylinder, and a substrate fixed on the second elevating substrate to move into the cavity of the upper mold. Since the core and product receiver that can move forward and backward and mount the core set for insertion into the mold are installed on the upper surface, the function of taking out the product from the mold, which was conventionally performed by another device, can be used. To prepare It is possible to, it is possible structure to provide an inexpensive device I Do less streamlined parts, automation of the casting apparatus can be easily ing.

[Brief description of drawings]

FIG. 1 is a front view of a core loader / product take-out device.

FIG. 2 is a side view of a core loader / product take-out device.

FIG. 3 is a plan view of a product.

FIG. 4 is a front view of a core insertion portion.

FIG. 5 is a side view of a core insertion portion.

FIG. 6 is a plan view of a core insertion tip portion.

FIG. 7 is an enlarged plan view of a core insertion tip portion.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a perspective view of a mandrel and a holding portion thereof.

10 is a perspective view of the mandrel and its holding portion as viewed from a direction orthogonal to FIG.

FIG. 11 is a vertical cross-sectional view of the product before removing the mandrel.

FIG. 12 is a schematic plan view of an automatic casting apparatus embodying the present invention.

[Explanation of symbols]

 1 Die casting machine 4 Sand core 5 Core loader and product take-out device. 6 Product 7 Upper mold 8 Lower mold 11 Sleeve 12 Mandrel 40 Loader 41 Support board 42 Substrate 47 Second lifting cylinder 48 Piston rod 50 First lifting cylinder 54 Piston rod 64 Holding cylinder 70 Core set

Claims (1)

[Scope of utility model registration request] 1. A support plate that is driven to move back and forth between the upper and lower open molds and the outside of the machine, and a piston rod supported by the support plate with the working end of the piston rod facing downward. A plurality of first elevating cylinders that land on the way of descending to raise the cylinder part, a second elevating cylinder supported by the working end of the piston rod facing upward on the cylinder part side, and a piston of the second elevating cylinder The horizontal substrate fixed to the working end of the rod, and the substrate set on this substrate moves up and down by moving the substrate up and down, and the core set for insertion into the mold can be placed on the upper surface. A core loader / product take-out device characterized by having a core / product receiver.