JPH03460A - Apparatus for casting cylinder block - Google Patents

Abstract

PURPOSE:To enable positioning with high accuracy by positioning and supporting a cylinder liner and water jacket core positioned on a core set jig with an upper mold and front and back molds and setting these molds to the prescribed position against a fixed lower mold at molten metal pouring position. CONSTITUTION:At the time of setting the cylinder liner 40 on a liner preset jig 35 at liner presetting position P4, a liner holding means 41 in a liner conveying carrier 34 holds the cylinder liner and at the same time waits while heating the cylinder liner with heating means built in this. In parallel, at the time of setting the water jacket core 57 on a core set jig 23 at core setting position P3, the liner conveying carrier is worked to set the heated cylinder liner to the core set jig. The core set jig is shifted to waiting position P2 and the cylinder liner is supported with the upper mold 12 and the water jacket core is supported with the front and back molds 15, 16 by a waiting running carrier 7. At the molten metal pouring position P1, the upper mold and the front and back molds are positioned against the fixed lower mold 2 and casting is executed and perfect automation can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cylinder block casting apparatus, and more specifically, when manufacturing an aluminum alloy cylinder block in which a cylinder liner is cast by a low-pressure casting method, the present invention relates to a cylinder block casting apparatus. The present invention relates to a casting device that allows highly accurate and automatic positioning of a water jacket core.

Conventional technology and its problems An example of a low-pressure casting device with a function of automatically setting a core in a mold is disclosed in Japanese Patent Application Laid-Open No. 179860/1986.
There are some that are disclosed in the publication.

This casting equipment consists of a lower guide base to which the lower mold is attached, a core surface plate where the core is temporarily placed on standby, and a product receiving mechanism that receives the product released from the upper mold in a horizontal direction. A first trolley is provided above the lower die base and the core platen at an appropriate interval, and is reciprocated between the lower die base and the core surface plate. Furthermore, a second carriage is provided above the lower die base and the product receiving mechanism to reciprocate between them, and the upper die base to which the upper die is attached is mounted on the second carriage so as to be movable up and down.

According to this structure, by alternately operating the first cart and the second cart, everything from positioning the core to the lower mold, mold clamping and pouring, to opening the mold and taking out the product is automatically performed. be able to.

However, in the above-mentioned low-pressure casting apparatus, after the core gripped by the core gripping mechanism is positioned on the lower mold, the core gripping mechanism releases the core and retreats.
Until the lower and upper molds are matched, the core is simply placed on the lower mold and there is nothing to restrain the core. Therefore, conventional equipment can only be used for casting products in which the core itself has excellent posture stability; If the core must be positioned in a state where it is substantially suspended from the lower mold, the core cannot be positioned with high precision.

In addition, in the manufacturing method of so-called liner-casting type cylinder blocks, in which a cast iron cylinder liner is cast into the mold at the same time as casting, not only the water jacket core but also the cylinder liner are placed in the mold before casting. Must be set. In that case, it is necessary to heat the cylinder liner in advance in order to improve the flow of the molten metal around the cylinder liner, and to quickly move on to heating and filling the molten metal.

Therefore, in the past, due to the above-mentioned time constraints, an operator had to take out the cylinder liner that had been heated in a burner-type heating furnace each time and set it in the mold.
This is a major hindrance in achieving complete automation of cylinder block casting operations, and at the same time, it is not possible to relieve workers from the harsh work of handling heated materials.

The present invention was made in view of the above problems.
The cylinder liner and watershake core can be positioned with high precision with respect to the lower mold, and the positioning can be done extremely easily and quickly, and even the heating of the cylinder liner can be done visually. The present invention provides a cylinder block casting apparatus as described above.

Means for Solving the Problems The present invention provides a casting apparatus for a cylinder block formed by casting a cylinder liner as described above. A pair of horizontal molds are provided on the plate and are movable in the horizontal direction between a pair of horizontal molds that can move forward and backward relative to the fixed lower mold, and a standby position adjacent to the pouring position and a core setting position adjacent to the standby position. and a core setting jig for positioning the cylinder liner and water jacket core at the regular casting position at the core setting position, and a mold mounting frame that can be raised and lowered, and between the pouring position and the standby position. is movable in the horizontal direction, and the mold mounting frame includes an upper mold, and a front and rear mold that advances and retreats from the upper mold in the horizontal direction to form a product space together with the fixed lower mold, the horizontal mold, and the upper mold. and a liner presetting jig provided at a liner presetting position adjacent to the core setting position to preset the cylinder liner;
The cylinder liner is provided with a liner gripping means having a built-in liner heating means and is movable in the horizontal direction between the liner preset position and the core setting position, and is capable of gripping and heating the cylinder liner on the liner brissing/sorting jig. and a liner conveying cart for transferring the liner to the core setting jig at the core center and throat positions at the top.

According to this structure, when the cylinder liner is placed on the liner presetting jig at the liner presetting/thrott position, the liner gripping means of the liner conveying cart grips the cylinder liner, and at the same time, the cylinder liner is heated by the built-in heating means. Wait while heating.

At the same time, when the quarter shaker throat core is sewn onto the core center and two-tooth jig at the core center and throat position, the liner conveyor is operated and the heated cylinder liner is moved. , into the core center throat jig that has already been firmly set with the water shaker.

The core center/throat jig with the water shaker core and cylinder liner set moves to the standby position, where the cylinder liner is moved to the upper mold by the waiting traveling trolley, and the water shaker/throat core is moved to the standby position. ζ is supported in the front and rear positions, respectively. By positioning the upper mold and the front and rear molds with respect to the fixed lower mold at the pouring position, the cylinder liner and the water shake throat core are positioned with respect to the fixed lower mold.

After this, the horizontal mold is added to the above-mentioned fixed lower mold and upper mold 1 front and back molds, and the cylinder liner, water shaker, and throat core are cast while being positioned and supported by each mold by positioning them mutually and pouring the metal. He will be cast and cast.

Note that the term "casting" here refers to something that is once cast in a predetermined position within the cylinder block, regardless of whether or not the part remains as a part of the product after being cast. shall be.

Embodiment FIG. 1 is a configuration explanatory diagram showing one embodiment of the casting apparatus of the present invention, FIG. 2 is a cross-sectional explanatory diagram taken along the line ■-■ in FIG.
The figure is a right side view of FIG. 1.

In Figures 1 to 3, PI is the pouring station, P
, is a standby station, and P3 is a core station. Further, P4 indicates a liner presetting station, P in FIG. 3 indicates a liner loading station, and P6 indicates a product unloading station.

A lower fixing plate l is arranged horizontally in the pouring station P, and a fixed lower mold 2 is fixed on this lower fixing plate l, and more precisely, with respect to the fixed lower mold 2,
A horizontal mold 4 is provided at the center of the fixed lower mold 2 and is driven forward and backward from the left and right by the operation of a horizontal cylinder 3, and a molten metal holding furnace 5 is arranged below the lower fixed plate 1.

In addition, a pair of track rails 6 is passed between the above-mentioned pouring station PI and standby station P, and these track rails 6 are connected to the stations P.
A traveling trolley 7 is provided which travels between I and PO.

The traveling trolley 7 is provided with a motor 8 as its traveling drive source, and supports a mold mounting frame 10 that is driven up and down by an elevating cylinder 9. I am going to guide you in the Gaitoro Nodo book. The upper mold 1 integrated with the bore mold 13 is located at the center of the lower surface of the mold mounting frame lO.
2, and the lower front and rear portions 4 of the mold mounting frame 10 are provided with opening/closing cylinders 17 for moving the front mold 15 and the rear mold 16 horizontally forward and backward with respect to the bore mold 13, as shown in FIG.
and 18 are respectively attached.

A standby station console P adjacent to the pouring station P;
A lifter 19 and a tiger 1 is equipped with two carts, a core transport cart 21 and a workpiece loading cart 22. On the core transporting cart 21, a core set and a sorting jig 23 are mounted, and on the workpiece loading cart 22, a workpiece is mounted. The holders are used to position and place the jigs 24, respectively.

Each of these carts 21, 22 has a rotor IJ-7
By coupling the actuators 25, 26 to the carriages 21, 22 via crank mechanisms 27, 28, respectively,
Based on the operation of each rotary actuator 25, 26, it is possible to travel from each end of the traverse rail 20 to the standby station P7 position, in other words, to a position directly above the lifter 19. In other words, the core transport vehicle 21 travels between the core setting station P and the standby station P, and the workpiece loading vehicle 22 travels between the product take-out station P and the standby station P.

Here, the lifter 19 is attached to one of the carts 21 or 2.
2 is located directly above it, it operates and the trolley 21
It functions to lift the jig 23 or 24 on the or 22 to a predetermined height by fitting the locating pin 30 of the lifter 19 into the recess 29 provided there.

As shown in FIG. 3, a pair of guide rails 31 are provided between the core setting station P3 and the liner presetting station P4 in parallel with the traverse rail 20, and the liner presetting station P4 and the liner charging station P are provided. A pair of running rails 32 extending perpendicularly to the guide rail 3I are provided between them.

The guide rail 31 supports a liner transport vehicle 34 that travels between the core setting station P and the liner preset station P4 by the operation of a cylinder 33, and the travel rail 32 supports a liner preset jig 35. A liner preset truck 37 is supported, which is mounted with a liner preset truck 37 and travels between the liner preset station P4 and the liner input station P by the action of a motor 36.

The liner carrier 34 is provided with a chuck mounting plate 39 that is moved up and down by the operation of the cylinder 38, and the chuck mounting plate 39 is provided with four liner chucks 41 as liner gripping means for gripping the cylinder liner 4°. It is being

As shown in FIGS. 5 and 6, the liner chuck 41 includes a plurality of chuck jaws 43 that open and close according to the operation of the chuck cylinder 42, and each chuck jaw 43 has a built-in block heater 44 as liner heating means. In addition, one of the chuck jaws 43 is provided with a thermocouple 45 for temperature control.

Next, the details of the main parts of the mold are shown in Figure 2, as well as Figures 7 and 8.
This will be explained based on the diagram.

In FIG. 7, a pouring port 46 provided on the fixed lower mold 2 on the lower fixed plate l is connected to the molten metal holding furnace 5 shown in FIG. 2 via a feeder 47 and a stalk 48, while a bracket 49 An upper mold 12 integrated with a bore mold 13 is attached to the lower surface of the mold mounting frame 10 connected through the
A product extrusion cylinder 52 has an ejector turbine 50 attached thereto, and an ejector turbine 50 disposed vertically penetrating the upper die 12, attached to the upper surface of the die attachment frame IO via a connecting plate 51.
It is connected to. A suction opening 54 connected to a vacuum pump 53 as suction means is formed on the peripheral surface of the tip of the bore mold 13.

Furthermore, the front and rear molds 15 and 16 are mounted on mold mounting plates 5 provided at each rod end of the opening/closing cylinder 17 and 18, as shown in FIG.
5, and the pair of horizontal molds 4.4 are respectively connected to a mold mounting plate 56 provided at the rod end of the horizontal cylinder 3. And, on the mold surface of the front and rear molds 15 and 16, there is a 9th
Skirting board 58.59 of water jacket core 57 shown in the figure
Baseboard insertion portions 60 and 61 are formed for fitting the ends of the baseboard.

Therefore, the front and rear molds 15 and 16 are placed in a forward posture relative to the bore mold 13, the bore mold 13 integrated with the upper mold 12 is lowered relative to the fixed lower mold 2, and the horizontal molds 4 and 4 are moved relative to the fixed lower mold 2. By moving the molds forward, a product space (cavity) R of the cylinder block W is defined between these molds.

Next, the operation of the casting apparatus configured as described above will be explained.

For example, when manufacturing a cylinder block for an in-line four-cylinder engine, first, the core carrier 21 and the core setting jig 23 are moved to the core setting station P3 at one end of the traverse rail 20 (see FIGS. 1 and 2). ) to,
The liner preset truck 37 is located at the core loading station P in FIG. 3, and the liner transport truck 34 is located at the liner preset station P4 in FIG. 1.3.

Then, at the liner official station P, the four cast iron cylinder liners 40 as shown in FIG.
Position and place it on the liner preset jig 35 on 7.

When the cylinder liner 40 is preset on the liner preset jig 35, the liner preset truck 37 travels to the liner preset station controller P4, and then the liner chuck 41 of the liner transport truck 34 is lowered by the operation of the cylinder 38, and the liner After the chuck 41 is inserted into the cylinder liner 40, each chuck claw 43 shown in FIG. 5 opens outward to grip each cylinder liner 40 in an inner diameter gripping manner. At the same time, the block heater 44 of each chuck jaw 40
The cylinder liner 40 is placed on standby while being energized and the cylinder liner 40 is heated by the heat conduction.

On the other hand, the core setting jig 2 of the core setting station P
3. A water jugget core 57 as shown in FIG.
When the cylinder liner 40 is set by the operator or the no-undling device, the liner transport vehicle 34 lifts the cylinder liner 40 gripped by the liner chuck 41 as shown in FIG. 4, and then travels to the core setting station P. During this transportation process, the block heater 44 and thermocouple 45
The cylinder liner 40 reaches a predetermined temperature (
For example, it is heated to a temperature of 400 to 500'C. Then, at the core setting station P, the cylinder liner 40 supported by the liner chuck 41
By lowering the cylinder liner 40 again, each cylinder liner 40 is set to the core setting jig 23 in which the water jacket core 57 has already been set. After releasing it upward, return to the previous liner preset station P4. As described above, the cylinder liner 40 and the water jacket core 57 are mutually positioned at the regular casting positions on the core setting jig 23.

Next, the core carrier 21 is moved to the standby station Pt by the operation of the rotary actuator 25, and at this standby station P3 position, the cylinder liner 40 and the water jacket core 57 on which the core setting jig 23 is positioned and mounted are moved. Along with lifter 19
It is raised to the upper limit position shown by the imaginary line in FIG.

At this point, the front and rear molds 15 and 16 attached to the mold mounting frame 10 are in a backward position with respect to the bore mold 13 due to the operation of the lifting cylinder 9, and are waiting at the lowering limit position.

As a result, the bore mold 13 enters into the cylinder liner 40, and the vacuum pump 53 also enters the cylinder liner 40 through the suction opening 54 (FIG. 7).
By suctioning each cylinder liner 40
is vacuum-adsorbed onto the circumferential surface of the bore mold 13.

Here, as shown in FIG. 5, the inner circumferential surface of the cylinder liner 40 has a slope corresponding to the draft angle of the entry portion of the bore mold 13. On the other hand, when the cylinder liner 40 reaches its rising limit, the cylinder liner 4o is accurately moved against the bore mold 13 based on the close contact of the cylinder liner 40 to the circumferential surface of the bore mold 13. Positioning is achieved, and insertion of molten metal between the two is completely prevented.

Furthermore, after waiting for the bore mold 13 and the cylinder liner 40 to be positioned, the front and rear molds 15 are placed against the bore mold 13.
．． By moving the opening/closing cylinders 17 and 16 forward, as shown in FIG. The water jacket core 57 is sufficiently advanced into the recess 60, 61 to accurately position and hold the water jacket core 57. Here, by supporting the water jacket core 57 at two locations of the baseboard 58 and 59,
The rotational moment around the baseboard 59 is suppressed to enable more accurate positioning.

In this way, the cylinder liner 40 and the water jacket core 57 are attached to the bore mold 13 and the front and rear molds 15, respectively.
．． 16, the core setting jig 23 is lowered by the lifter 19, and the lifting cylinder 9 is operated to move the mold mounting frame IO together with the upper mold 12 and the front and rear molds 15 and 16. , and further, the cylinder liner 40 and the water jacket core 57 are lifted together with the cylinder liner 40 and the water jacket core 57, and based on the subsequent traveling movement of the traveling truck 7 by a predetermined amount, the cylinder liner 40 and the water jacket core 57 are moved to the pouring station P1 as shown by the solid line in FIG. Position accurately.

Next, based on the elongation operation of the lifting cylinder 9 again, the upper mold 12 and the front and rear molds 15 and 16 are gradually lowered, and as shown in FIGS. 2 and 7, they are placed in a predetermined position relative to the fixed lower mold 2. By setting it accurately, the upper mold 1
The cylinder liner 40 and water jacket core 57 held by the front and rear molds 15 and 16 are also very smoothly and precisely set in the predetermined positions relative to the fixed lower mold 2, and then horizontally By advancing the horizontal mold 4 with respect to the fixed lower mold 2 by the cylinder 3, a product space R of the cylinder block having a required three-dimensional shape is formed between the respective molds, as shown in FIG.

For this product space R, the molten metal in the molten metal holding furnace 5 is transferred to the stoke 48. Molten metal is poured through the feeder 47 and the pouring port 46. As a result, the cylinder liner 40 and the water jacket core 57 are cast.

After the molten metal is completely solidified to form the required cylinder block W, first the horizontal mold 4 is moved back relative to the fixed lower mold 2, and then the upper mold 12 is moved by the lifting cylinder 9. The bore mold 13 and the front and rear molds 15, 16 are lifted together with the cylinder block W as shown in FIG. ■3.15.16 and cylinder block W
are transported to a standby station P by a traveling carriage 7, and at that position, the lifting cylinders 9 are extended to bring them to their lowering limit positions.

Next, the waiting station P on the traverse rail 20
At the first position, as shown in FIG. 13, by raising the lifter 19 on which the workpiece loading cart 22 is placed and waiting, the workpiece receiver positioned and arranged on the cart 22 moves the jig 24 in the same figure. The cylinder block W is temporarily received by the jig 24. Furthermore, while the upper mold 12 is moved upward, the front and rear molds 15 and 16 (not shown) are also moved backward, and in this state,
The cylinder block W is released from the upper mold 12 by causing the eject turbine 50 to protrude from the upper mold 12 by operating the product extrusion cylinder 52 .

In addition, during such mold release, damage to the cylinder block W can be extremely effectively prevented by, for example, synchronizing the ejection speed of the ejector turbine 50 and the descending speed of the work receiver jig 24.

The workpiece receiving jig 24 that has received the cylinder block W in this way is positioned and arranged again on the workpiece loading cart 22 by the lifter 19, and then the product shown in FIG. The cylinder block W is then transferred to the take-out station P, where it is handed over to the next process.

Effects of the Invention As described above, according to the present invention, by positioning and supporting the cylinder liner and water jacket core positioned on the core setting jig with the upper mold and the front and rear molds,
By simply setting these molds at predetermined positions relative to the fixed lower mold at the pouring position, the cylinder liner and water jacket core can also be positioned with high precision relative to the fixed lower mold. Moreover, since the cylinder liner and water jacket core are cast while being supported by the upper mold and the front and rear molds, the final positioning accuracy of the core etc. can be greatly improved compared to conventional methods, and the core Although the shape of is extremely complex and unstable,
Complete automation from setting cores, etc. to casting can be achieved.

In addition, heating of the cylinder liner is performed by the heating means built into the liner gripping means before the cylinder liner is conveyed from the liner loading position to the core setting position. There is no need for an operator to be involved in setting the cylinder liner into the mold, and this can greatly contribute to the complete automation of the cylinder head casting work, including the heating of the cylinder liner.

[Brief explanation of the drawing]

Fig. 1 is a configuration explanatory diagram showing one embodiment of the casting device of the present invention, Fig. 2 is an explanatory cross-sectional diagram taken along line 1] in Fig. 1, Fig. 3 is a right side view of Fig. 1, The figure is an operational explanatory diagram of the main parts of Figure 1, Figure 5 is an enlarged sectional view of the liner chuck, and Figure 6 is the 5th liner chuck.
7 is an enlarged view of the main part of Fig. 2, Fig. 8 is an enlarged explanatory view of the first main part, and Fig. 9 is a perspective view of the cylinder liner and water jacket core. Figure, 10th
figure. FIGS. 11, 12, and 13 are explanatory views of the main parts of FIG. 2. 1...Lower fixing plate, 2...Fixing lower mold, 4...
・Horizontal type, 7... Traveling trolley, 10... Mold mounting frame, I2... Upper die, 13... Bore type, 15... Front die, 16... Rear die, 21...・Central transport trolley, 23・
... core center, jig, 34 ... liner transport trolley, 3
5... Liner brisse/soto jig, 37... Liner presetting trolley, 40... Cylinder liner, 4 work...
Liner chuck as liner gripping means, 44... Pro-Tsuku heater as heating means, 54... Suction opening, 57... Water jacket core, 58.59.
... Baseboard, 60.61 ... Baseboard insertion part, R ... Product section space, W ... Cylinder pro-tsuku, Pl ... Pouring station (pouring position), P, ... ... Standby station (standby position), p3 ... Core set station (core set position), P, ... Liner preset station (liner preset position). Figure 11 Figure 12

Claims (1)

[Claims] (1) In a casting machine for a cylinder block formed by casting a cylinder liner, there is a fixed lower mold fixed to a horizontal lower fixed plate at the pouring position, and a fixed lower mold provided on the lower fixed plate and A pair of horizontal types that can move forward and backward, and can move in the horizontal direction between a standby position adjacent to the pouring position and a core setting position adjacent to the standby position,
A core setting jig that positions the cylinder liner and water jacket core at the regular casting position at the core setting position, a mold mounting frame that can be raised and lowered, and a horizontal position between the pouring position and the standby position. The mold mounting frame has an upper mold, and front and rear molds that advance and retreat in the horizontal direction with respect to the upper mold to form a product space together with the fixed lower mold, horizontal mold, and upper mold. a liner presetting jig provided at a liner presetting position adjacent to the core setting position to preset a cylinder liner; and a liner gripping means having a built-in liner heating means, and a liner presetting jig provided at a liner presetting position adjacent to the core setting position, and a liner gripping means having a built-in liner heating means. A liner that is movable horizontally between the core setting position and the cylinder liner that grips and heats the cylinder liner on the liner presetting jig and then transfers it to the core setting jig at the core setting position. A cylinder block casting device comprising: a conveyance cart;