JP2623310B2 - Casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention includes a plurality of partition walls in parallel with the outer wall inside the outer wall, and the outer wall and each partition wall have The present invention relates to a casting apparatus used for casting a material for a structural member having a coaxial through hole.

(2) Conventional technology Conventionally, the raw material is manufactured by performing a drilling process on an outer wall and respective partition walls after casting to form respective through holes.

(3) Problems to be Solved by the Invention However, according to the above-mentioned method, in forming the through holes, the centering work is troublesome, and it is difficult to form each through hole coaxially, so that the working efficiency is poor. There is a problem.

An object of the present invention is to provide the casting device capable of solving the above-mentioned problem.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a vehicle, comprising:
A casting apparatus comprising: a plurality of partition walls in parallel with the outer wall, wherein the outer wall and each of the partition walls are cast with a material for a structural member having a coaxial through hole formed therein. In order to form the space between the partition walls and the space between the adjacent partition walls, a plurality of protrusions are provided on the cavity forming surface of the mold, and the outer wall forming block of the mold is provided on the base member. An outer wall forming position for forming the outer wall and a release position separated from the outer wall are provided so as to reciprocate in the axial direction of the through-hole, and the outer wall forming block has one penetrating hole. The outer wall molding is performed between a through hole forming position where the through hole forming pin-shaped core is fitted into a through hole formed coaxially with each protruding portion and a mold release position where the core is separated from the material. Reciprocating in parallel with the reciprocating direction of the block An intermittent mechanism for connecting a piston rod of a reciprocating working cylinder for reciprocating the same to the through-hole forming pin-shaped core, and intermittently connecting the outer wall forming block to the piston rod. ,
The interrupting mechanism includes a connection state for moving the outer wall forming block from the release position to the outer wall forming position in the mold closing step, and the through-hole forming pin after moving the outer wall forming block to the outer wall forming position. And a cut-off state allowing movement of the core from the mold release position to the hole forming position. On the other hand, in the mold opening step, the pin core for hole forming is moved from the hole forming position to the mold release position. And a connection state for moving the outer wall forming block from the outer wall forming position to the releasing position after the hole forming pin-shaped core is moved to the releasing position. And

(2) Operation According to the casting apparatus, the reciprocating motion of the outer wall forming block and the through hole forming pin-shaped core is performed by one operating cylinder.

Also, since the pin-shaped core for hole forming moves to the hole forming position after the outer wall forming block moves to the outer wall forming position,
At the outer wall forming position, the position of the outer wall forming block is firmly fixed, so that there is no backlash between the base member and the outer wall forming block, so that the through-hole forming pin-shaped core smoothly fits into the through hole of each protrusion. Combine.

Further, during casting, the pin-shaped core for through-hole formation is firmly held by each projection, so that bending of the pin-shaped core due to the injection pressure of the molten metal is prevented.

Furthermore, when the pin-shaped core for hole forming is separated from the material after casting, the block for forming the outer wall is in the positioning state, so the pin-shaped core is guided by the block for forming the outer wall, and the material and Detach smoothly from each through hole.

(3) Example Figure 1 shows a structural member for a material 1, the material 1 connects the mutually parallel pair of first and second outer wall 2 _1, 2 ₂ and Ryogaiheki 2 _1, 2 ₂ a connecting wall 3, Ryogaiheki 2 _1, 2 ₂ of the first to third partition wall lies at the inner protruding with a predetermined interval in the connecting wall 3 so as to have a parallel relationship with their 4 _{1-4 3} And The first outer wall 2 ₁ and the first partition wall 4 between _1, first and second partition wall
4 _1, 4 ₂ between the second and third partition wall 4 _2, 4 ₃ between and the third
Between the partition walls 4 ₃ and the second outer wall 2 _2, first to fourth space s ₁
Ss ₄ are respectively defined.

The first outer wall 2 ₁ and each of the partition walls ₄₁ to _3, through holes 5 ₁ to 5 ₄ are shaped to lie on the same axis.

Further, the first outer wall 2 _1, another through hole 6 on one side across the through hole 5 ₁ a recess 7 which opens outwardly on the other side is formed respectively, and the second outer wall 2 _2, Recess 8 opening outward
Is molded.

2 to 4 show a casting apparatus 9 for casting the raw material 1, FIG. 2 corresponds to a mold open state, and FIG. 3 corresponds to a mold closed state.

Mold 10 as the mold includes a fixed mold 11, more composed and retractably movable mold 12 in the arrow a ₁ direction with respect to the fixed die 11.

The cavity forming surface 13 of the fixed mold 11, first to fourth protruding portions 14 ₁ to 1 for shaping the first to fourth space s ₁ ~s ₄ Material 1
4 ₄ is protruded.

Movable mold 12 includes a mold body 16 serving as a base member, a convex portion 15 which is used for molding the connecting wall 3 so as to project in the mold body 16 so as to face the tip end surface of each of the protrusions 14 ₁ to 14 ₄ , a first block 17 ₁ for the first outer wall molded disposed on one side of the projection 15, the second block for the second outer wall forming disposed on the other side of the protrusion 15 17
Consists of _two . Both blocks 17 ₁ , 17 ₂ have engaging ridges 18 ₁ , 18 ₂ extending in the direction of the arrow a ₂ perpendicular to the moving direction a ₁ of the movable mold 12 on the side facing the mold body 16. Collar 18 ₁ , 18 ₂
Are engaged with the respective engagement grooves 19 ₁ and 19 ₂ formed in the mold body 16 so as to extend in the same direction a _{2 as} described above.
7 ₁ and 17 ₂ are configured to be slidable in the direction of arrow a _{2 with} respect to the mold body 16.

The first block 17 ₁ is a side and fixed in the projection 15 11
First, second protrusions 20 _1, 20 _2, also positioning projection on the opposed surfaces of the fixed mold 11 for molding the through hole 6 and the recess 7 of the material 1 to the surface facing the first projecting portion 14 side of the 21 ₁ each. Positioning recesses 22 ₁ positioning convex portion 21 ₁ is fitted is formed in the fixed die 11.

The first block 17 ₁ is an outer wall forming position is brought into contact with the first protrusion 20 ₁ on one side of the projection 15 (FIG. 2 chain line, Figure 3)
When the first protrusion 20 _1, reciprocates between the one side surface, thus the first outer wall 2 ₁ release was separated from the position in the after casting material of the projecting portion 15 (FIG. 2 indicated by a solid line) be able to.

The second block 17 _2, fourth protrusions 14 ₄ projections 23 forming the recess 8 of the material 1 to the surface facing the side surface and the positioning protrusion on the surface facing the fixed mold 11 21 of the fixed mold 11 ₂ respectively. Positioning recesses 22 ₂ positioning convex portion 21 ₂ is fitted is formed in the fixed die 11.

The second block 17 _2, the surface 24 facing the other side surface of the protrusion 15
The projection 15 outer wall forming position is brought into contact with (FIG. 2 chain line, FIG. 3) and, is separated from the second outer wall 2 ₂ material 1 is the surface 24 protrusions 15, thus after the casting 2 (see the solid line in FIG. 2).

The first block 17 _1, the sliding direction a ₂ and extending parallel to the through-hole 25 is formed, the bushing 26 is fitted into the through-hole 25.

To the first to third protruding portions 14 ₁ to 14 ₃ of the fixed mold 11, through holes 27 ₁ to 27 ₃ are formed so as to be positioned on the hole coaxial with the bush 26 in the closed state of the mold 10 . The inner peripheral surface thereof through holes 27 ₁ to 27 _3, tapered in accordance reach the fourth protruded portion 14 _4-side opening end of the first projecting portion 27 ₁ of the first block 17 ₁ side opening end than the third projecting portion 14 ₃ Are located on the virtual tapered surface.

One pin-shaped core 28 for forming a through hole is inserted into the bush 26 so as to penetrate the bush 26, and the pin-shaped core 28
Is hole forming position is brought into contact with the tapered tip 29 end surface to the fourth protruding portion 14 ₄ sides with fitting the tapered tip 29 into the through holes 27 ₁ to 27 ₃ (Figure 3) , it is possible to reciprocate between the release position disengaged after casting tapered tip 29 from the material 1 and the through-holes 27 ₁ to 27 _3.

With taper fitted with tapered distal portion 29 and the through holes 27 ₁ to 27 ₃ as described above, the pin-shaped core 28, without rattling in its hole forming position, thereby the through hole 5 ₁ it is possible to suppress the occurrence of burrs 5 _4-neck edge, also prevents bending of the tapered distal portion 29 due to the injection pressure of the molten metal.

As shown in FIG. 4, the pin-shaped core 28 is provided with a cooling water circuit 30 as follows. That is, a stepped blind hole 32 that extends in the axial direction over substantially the entire length is formed in the core body 31 having the tapered tip portion 29, and one end of the large-diameter hole 32a is opened at the end face of the core body 31. The bottom of the small-diameter hole 32b is located near the end of the tapered tip 29. Water hole 3 in large diameter hole 32a
A plug 34 having a plug 3
A tube 35 communicating with 3 is loosely inserted into the small-diameter hole 32b. At the base end side of the core body 31, an inlet hole 36 communicating with the water hole 33 of the plug 34 and an outlet hole 37 communicating with the small diameter hole 32b are formed.

Thereby, when cooling water is supplied to the inlet hole 36, the cooling water passes through the water passage hole 33, the pipe 35, and the small-diameter hole 32b, and is supplied to the outlet hole 3.
Emitted from 7.

When the cooling water circuit 30 is provided on the pin-shaped core 28 in this way,
The overheating of the pin-shaped core 28 can be prevented to improve its durability, and the solidification speed of the molten metal around the pin-shaped core 28 can be increased, so that the solidification speed of the entire molten metal becomes uniform, 28
The casting quality of the material 1 can be improved by preventing the occurrence of casting defects such as the occurrence of shrinkage cavities due to a delay in the solidification speed of the molten metal.

An operating cylinder 39 with the tip of the piston rod 38 facing the outer peripheral surface of the pin-shaped core 28 is disposed on the fixed mold 11, and a stopper 40 is attached to the tip of the piston rod 38. Stopper 40
Moves forward only when the pin-shaped core 28 is in the through-hole forming position, and engages with the concave portion 41 of the pin-shaped core 28, whereby the pin-shaped core 28 is held at the through-hole forming position.

In the first block 17 near _1, the support bracket 42 in the mold body 16 is projected, the support bracket 42 reciprocates for actuating cylinder 43 is supported so as to be positioned in the pin-shaped core 28 coaxially. The distal end of the piston rod 44 of the working cylinder 43 is connected to the base end of the pin-shaped core 28 via a coupler 45.

The first block 17 _1, connecting rod 46 extending in parallel to the pin-shaped core 28 is protruded, in the connecting rod 46, interrupting mechanism 4 intermittently between the first block 17 ₁ and the piston rod 44
7 is provided. The intermittent mechanism 47 includes an annular body 49 having an opening 48 that is attached to the tip of the connecting rod 46 and through which the coupler 45 can be loosely inserted, and a pair of openable and closable parts that are overlapped on the end surface of the annular body 49 on the side of the working cylinder 43. Of the piston rod 51 attached to the annular body 49 and the engagement bodies 50 ₁ and 50 ₂
And a opening and closing operation cylinder 52 coupled to _1, 50 ₂ of the switching mechanism.

In the above configuration, in the state in which the piston rod 51 by the operation of opening and closing the working cylinder 52 is contracted both engager 50 _1, 50 ₂ is opened, the first block 17 ₁ is a piston rod 44
And in the cutoff state. On the other hand, the piston rod 44 contracts due to the operation of the reciprocating operation cylinder 43, and the annular engagement groove 53 of the coupler 45 faces both the engagement members 50 ₁ , 50 _2. When the two engaging members 50 ₁ , 50 ₂ close, the engaging members 50 ₁ , 50 ₂ engage with the engaging grooves 53, and the piston rod 44 and the first block 17 ₁
Are connected.

The piston rod 54 of reciprocating for actuating cylinders not shown in ₂ the second block 17 is connected.

Next, the casting operation of the structural member material 1 will be described.

As shown in FIG. 2, before the start of the casting operation, the mold 10 is in the mold open state, and the movable mold 12 is separated from the fixed mold 11. The first block 17 the piston rod 44 of reciprocating for actuating cylinder 43 is contracted ₁ and the pin-shaped cores 28
There In the respective releasing positions, the tapered tip 29 resides in the first block 17 in _one of the bushing 26.

Further abuts the coupler 45 to the support bracket 42, the Ryokakari assembly 50 _1, 50 ₂ first block 17 ₁ engages the engaging groove 53 of the coupler 45 is connected to the piston rod 44.
That is, the intermittent mechanism 47 is in the connected state.

Furthermore, the stopper 40 retreats and escapes from the movement path of the pin-shaped core 28.

On the other hand, ₂ second block 17 located in the first block 17 similar to the _first releasing position.

Is hitting the casting operation, the piston rod 44 is extended by the operation of the reciprocating for the working cylinder 43, thereby the convex portion 15 of the first block 17 ₁ and the pin-shaped core 28 is movable mold 12 at the same time
Move towards. The first block as shown by the chain line in FIG.
17 when the first protrusion 20 _{1 1} abuts against the projection 15, the first block
17 ₁ reaches the outer wall forming position, and at the same time, the reciprocating operation cylinder 43 stops operating.

The second block 17 ₂ moves toward the projection 15 of the movable mold 12 by extension of the piston rod 54 of the reciprocating for working cylinder, the second block 17 ₂ convex portions as shown in Figure 2 chain line 1
When in contact with the 5, the block 17 ₂ reaches the outer wall forming position, reciprocating a working cylinder stops operating at the same time.

Third movable mold 12 as shown in FIG advances toward the fixed mold 11, first, second block 17 _1, 17 ₂ of the two positioning convex portions 21 _1, 21 ₂
Are fitted into both positioning concave portions 22 ₁ and 22 ₂ of the fixed die 11, respectively.

Both engaging bodies 50 ₁ , 50 ₂
Is disengaged from the engaging groove 53 of the coupler 45 is opened, while the first block 17 ₁ and the piston rod 44 is blocked. That is,
The intermittent mechanism 47 is turned off.

The piston rod is operated by the operation of the reciprocating operation cylinder 43.
44 extends, whereby the pin-shaped core 28 slides in the bush 26 so that the tapered tip portion 29 of the pin-shaped core 28 becomes the _first to third protrusions 141 to 1.
4 ₃ is fitted into the through-holes 27 ₁ to 27 _3, and the tapered tip 29 end face abuts against the side surface of the fourth projecting portion 14 _4, the pin-shaped core 28
Reaches the hole forming position, and at the same time
Stops working. The stopper 40 advances and the pin-shaped core 28
With the concave portion 41 of the main body.

With the above, the mold 10 is in a mold closed state, and the fixed mold 11,
The cooperation of the movable mold 12 and the pin-shaped core 28 defines a material molding cavity C.

The pin-shaped core 28 after the first block 17 ₁ is moved to the outer wall forming position as described above is moved to the hole forming position, positioning the first block 17 ₁ becomes firmly in the outer wall forming position, thus mold body By eliminating play between the first block 16 and the first block 17 ₁ , the pin-shaped core 28 is moved to each of the projections 14 _1.
Smoothly fits to 14 ₃ of the through-holes 27 ₁ to 27 _3.

After that, the cavity C
The material 1 is cast therein.

During this casting, the pin-shaped core 28 is firmly held by the first to third protruding portions 14 ₁ to 14 _3, the pin-like core 28 bending is prevented.

After the material 1 has solidified, the stopper 40 is moved to the concave portion 41 of the pin-shaped core 28.
Break away from Then, the piston rod 44 contracts by the operation of the reciprocating operation cylinder 43, whereby the pin-shaped core
28, the tapered tip portion 29 is detached from the material 1 and the through holes 27 _{1 to} 27 ₃ , and the pin-shaped core 28 reaches the release position in which the end face is located in the bush 26, and at the same time, the reciprocating operation cylinder 43
Stops working. Under this condition, the engagement groove of the coupler 45
Since 53 is opposed to both engagement members 50 ₁ and 50 ₂ , the operation of the opening / closing operation cylinder 52 closes both engagement members 50 ₁ and 50 ₂ , causing the coupler 4 to close.
It engages the engaging groove 53 of the 5, between the first block 17 ₁ and the piston rod 44 is connected. That is, the intermittent mechanism 47 is in the connected state.

The movable mold 12 retreats and is separated from the fixed mold 11. Material 1 is attached to movable mold 12.

The piston rod is operated by the operation of the reciprocating operation cylinder 43.
44 reaches the first block 17 ₁ is a release position contracted, the working cylinder 43 stops operating at the same time. Similarly to return to the second block 17 ₂ releasability position. As a result, the material 1 is released.

As described above, after casting, when disengaging the pin-shaped core 28 from the blank 1, the first block 17 ₁ is in the positioned state, the pin-shaped core 28 is guided into _a first block 17, smoothly disengaged from the material 1 and the through-holes 27 ₁ to 27 _3.

In the above-described embodiment, the first and second blocks 17 ₁ and 17 ₂ are supported by the mold body 16, but the blocks 17 ₁ and 17 ₂ are attached to another member, for example, a base plate separate from the mold 10. It can also be supported.

INDUSTRIAL APPLICABILITY The present invention is applied to, for example, forming a pair of balancer shaft mounting through holes in an engine cylinder block. The casting conditions in this case are: molten metal: aluminum alloy (JIS ADC12), temperature: 650 ° C, molten metal injection speed: 0.2-0.3 m / sec at low speed, 2.5-4 m / sec at high speed, molten metal injection pressure: 800-900 kg / cm ² , solidification time: 25 seconds (then mold opening), casting weight: about 30 kg.

C. Effects of the Invention As described above, according to the present invention, the operation system of the outer wall forming block and the pin-shaped core can be simplified, and the entire apparatus can be made compact.

In addition, the fitting of the pin core into the through hole of each projection and the removal of the pin core from the material are performed smoothly,
In addition, the pin-shaped core can be held firmly during casting, thereby improving the durability of the pin-shaped core.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a sectional view of a material, FIG. 2 is a sectional view of a casting apparatus in a mold open state, and FIG. 3 is a casting in a mold closed state. FIG. 4 is a cross-sectional view of the pin-shaped core. s ₁ ~s ₄ ...... first through fourth space, material for 1 ...... structural member 2 ₁
...... first outer wall, ₄₁ to ₃ ...... first to third partition wall 5 ₁ to 5 ₄
... through-hole, 10 ... mold (mold), 13 ... cavity forming surface, 14 _{1 to} 14 ₄ ... first to fourth protrusions, 16 ... mold body (base member), 17 ₁ ... First block for forming first outer wall, 27 ₁
… 27 ₃ … Through-hole, 28… Pin-shaped core for through-hole forming, 43…
… Reciprocating working cylinder, 44… Piston rod, 47…
… Intermittent mechanism

Claims (1)

(57) [Claims] 1. A casting in which a plurality of partition walls are provided in parallel with the outer wall on the inner side of the outer wall, and a material for a structural member is formed in which the outer wall and each of the partition walls are formed with coaxial through holes. An apparatus, wherein a plurality of protrusions are provided on a cavity forming surface of a mold to form a space between the outer wall and the adjacent partition wall and a space between the adjacent two partition walls, and the base member includes a plurality of protrusions. An outer wall forming block of a mold is provided so as to reciprocate in an axial direction of the through hole between an outer wall forming position at which the outer wall is formed and a releasing position separated from the outer wall, and the outer wall forming block is provided. The block has one through-hole forming pin-shaped core penetrating therethrough, and is separated from the material by a through-hole forming position where it is fitted into a through hole formed coaxially with each protrusion. Between the mold release position and the outer wall forming block, And a piston rod of a reciprocating working cylinder for reciprocating the through-hole forming pin-shaped core is connected to the through-hole forming pin-shaped core, and the outer wall forming block is connected to the piston. An intermittent mechanism for intermittently intermittently with the rod, wherein the intermittent mechanism includes a connection state for moving the outer wall forming block from a mold release position to an outer wall forming position in a mold closing step, and forming an outer wall of the outer wall forming block. And a cut-off state in which the hole-forming pin-shaped core is allowed to move from the mold release position to the hole-forming position after being moved to the position. And moving the outer wall forming block from the outer wall forming position to the releasing position after moving the pin-shaped core for through hole forming to the releasing position and moving the outer wall forming block from the outer wall forming position to the releasing position. Connection status Casting apparatus characterized by having.