JPH0333058B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vertical clamping mold or a vertical casting mold for casting molten metal or molten resin into the cavity of a vertically clamped mold from directly below the cavity. The present invention relates to a cast molding device.

[Prior Art] Injection molding equipment such as die casting machines or injection molding machines for plastics is classified into vertical injection molds and horizontal molds depending on the mold clamping direction, and vertical injection molds and horizontal molds depending on the injection direction. It is classified into injection type.

Fig. 5 is a longitudinal sectional view of the main parts of a conventional vertical mold clamping and vertical casting type die casting machine. 1
and a movable platen 2 that moves up and down along tie rods (not shown) installed at its four corners, and a fixed mold 3 and a movable mold 4 are fixed to both platens 1 and 2, respectively. has been done. Furthermore, a pair of cores 5 and 6 are interposed between the upper and lower molds 4 and 3 and are supported by the movable mold 4 side, and are moved forward and backward in the horizontal direction indicated by the symbol A by a drive device (not shown). It is configured. The molds 3 and 4 and the cores 5 and 6 in this example are for molding aluminum foil for vehicles, and the convex portions of the molds 3 and 4 and the four-part annular core 5 , 6 is formed with a cavity 7 which is a space having the same shape as the aluminum foil. On the other hand, below the machine base to which the fixed platen 1 is fixed, a casting cylinder (not shown) is arranged so as to be able to stand up and tilt freely, and 8 is a plunger that is moved up and down by this casting cylinder. Further, 9 is a block that is raised and lowered by another cylinder on the casting cylinder side. A casting sleeve 10, into which a plunger tip 8a at the tip of the plunger is slidably fitted, is concentrically fixed to the upper end of the block 9. As the block 9 rises, it is fitted into the sleeve hole 3a of the stationary mold 3 as shown in the figure. Further, the casting sleeve 10 and the block 9 are engaged in the notch 1a of the fixed platen 1, and when the block 9 is lowered, the casting sleeve 10 is pulled out from the sleeve hole 3a, and the entire injection cylinder is shown in the figure. Tilt it in the direction shown by arrow B,
After pouring the molten metal 11 into the casting sleeve 10, it is made to stand up again, as shown in FIG.

With this structure, as shown in FIG. 5, after the mold is closed, the casting cylinder is tilted into the casting sleeve 10 while the block 9 and the casting sleeve 10 are lowered. After pouring the molten metal 11, the casting cylinder is raised and the block 9
is raised to fit the upper end of the casting sleeve 10 into the sleeve hole 3a. When pressure oil is fed into the casting cylinder to raise the plunger 8, the plunger tip 8a, which is the head of the plunger 8, pushes up the molten metal 11 and casts it into the cavity 7. When the upper end surface of the plunger tip 8a rises to the position indicated by the chain line 13 and stops, the filling of the molten metal 11 into the cavity 7 is completed. Wait for the molten metal 11 to solidify,
While raising the movable platen 2 and opening the mold,
After moving cores 5 and 6 outward, cavity 7
The product solidifies inside and protrudes. In this case, the dotted line 12 in the figure is the lower end of the product, and this product contains the solidified molten metal, so-called biscuits, at a location 14 between the dotted line 12 and the chain line 13, which is the upper limit of the plunger tip 8a. A section is included. This biscuit portion is cut in a separate process after the product is removed.

[Problems to be Solved by the Invention] However, in such conventional vertical mold clamping and vertical casting die casting machines, there is a gap between the cavity 7 and the casting sleeve 10 due to the removal of the product after opening the mold. Since the diameter of the molten metal passage cannot be made smaller than the inner diameter of the casting sleeve 10, the biscuit part becomes large and the molten metal required for this becomes large, which is not only uneconomical, but also If the surface indicated by the dotted line 12 in the figure becomes a decorative surface, this becomes the cut surface of the biscuit, resulting in a rough surface that makes it impossible to apply a desired design to the aluminum foil. In addition, the shell 15, which is a solidified molten metal formed on the inner surface of the casting sleeve 10, is often pushed up by the plunger tip 8a during casting and enters the cavity 7, and this remains inside the product, resulting in quality of the product. There were cases where it decreased. Therefore, in the past, attempts have been made to provide punching metal or wire mesh at the location indicated by the dotted line 12 in order to block the penetration of the shell 15, or to fit a ring into the upper end of the inner hole of the casting sleeve 10. There was a problem that the handling was troublesome and the consumption of consumables increased.

[Means for Solving the Problems] In order to solve these problems, the present invention provides a method for solving the problems described above, in which a method is provided in the melt passage between the casting sleeve and the mold cavity of the vertical mold clamping vertical casting apparatus. , a gate plate having a hole with a smaller cross-sectional area than the inner hole of the casting sleeve and divided into parts with this hole as a boundary is provided so as to be movable in the horizontal direction, and in a direction perpendicular to the direction of movement of the gate plate. A regulating member that regulates the movement of the gate plate is movably provided on the side of the gate plate, and a control member that controls the movement direction of the gate plate and the regulating member is provided on the joint surface between the regulating member and the side surface of the end joint of the gate plates. We adopted a structure with sloped sections that are oblique to both directions of movement of the members.

[Operation] When the hole in the gate plate is positioned at the center of the molten material passage and the molten material is poured into the cavity, the shell generated in the casting sleeve is blocked by the hole in the gate plate and remains in the casting sleeve. . During casting, the movement of the gate plate is sufficiently restricted by the movement regulating member to cope with the internal stress of the gate plate due to thermal expansion and pouring of molten metal.
After the molten material filled in the cavity has solidified, the movement restriction of the gate plate by the movement restricting member is released, and both divided gate plates are moved in the same direction. When the mold is opened, the product is held on the movable mold side with the biscuit part remaining below the gate plate, and by ejecting it, the casting cycle is completed. When the gate plate is moved, the gate plate is freed from the restriction of the movement restriction member in the cross direction, and therefore moves smoothly. Furthermore, if the solidified molten material is not sheared, perform casting with the gate plate closed, then open the left and right gate plates by moving them in opposite directions, so that the hole in the gate plate aligns with the hole in the casting sleeve. Since the diameter is the same as that of the product, the product can be ejected without any problem. After taking out the product, remove the biscuit by cutting from the thin part that corresponded to the hole in the gate plate during casting.

[Example] Figures 1 to 3 show an example in which the injection molding apparatus according to the present invention is applied to a vertical mold clamping and vertical casting die casting machine. 2
The figure is a sectional view taken along the line -- in FIG. 1, and FIGS. 3 a to 3 f are longitudinal sectional views of main parts shown for explaining the operation.

In FIG. 1, the vertical mold clamping and vertical casting die casting machine includes a fixed platen 21 fixed on a machine base (not shown) and a movable platen that moves up and down along tie rods (not shown) installed at its four corners. 22, and both platens 2
A rectangular fixed metal 23 and a movable mold 24 are fixed to 1 and 22, respectively. Then, by moving the movable platen 22 up and down using a mold clamping cylinder (not shown) above the movable platen 22, the movable mold 24 is clamped to the fixed mold 23 and opened. Moreover, between the upper and lower molds 24 and 23,
Cores 25 and 26 each having a semicircular inner circumferential surface divided into four parts.
is supported and interposed on the movable mold 24 side,
It is configured to move horizontally forward and backward by a drive device (not shown). And mold 2 of the example
3 and 24 and cores 25 and 26 are for casting aluminum foil for vehicles, for example, and the protrusion 23e of the mold 23 and the protrusion 24 of the mold 24
A and the four-part annular cores 25 and 26 have a cavity 2 which is a space having the same shape as aluminum foil.
7 is formed. On the other hand, below the machine base to which the fixed platen 21 is fixed, a casting cylinder (not shown) is disposed so as to be tiltable upright.
28 is a plunger that is moved up and down by this casting cylinder, and 29 is a block that is moved up and down by another cylinder on the casting cylinder side. A casting sleeve 30, into which a plunger tip 28a provided at the tip of the plunger 28 is slidably fitted, is concentrically fixed to the upper end of the block 29. As shown in FIG.
The sleeve hole 23a is inserted into the sleeve hole 23a. Further, the casting sleeve 30 and the block 29 are engaged in a notch 21a of the fixed platen 21, and by lowering the block 29, the casting sleeve 30 is pulled out from the sleeve hole 23a, and the entire casting cylinder is removed, for example. The casting sleeve 30 is tilted, the upper end of the casting sleeve 30 is moved to a position where melt can be supplied, and after pouring the molten metal 31 into the casting sleeve 30, the casting sleeve 30 is raised again. The plunger 28 is equipped with a plunger tip 28a as a head that slides while being fitted into the inner hole of the casting sleeve 30. The plunger 28 is raised by the operation of the casting cylinder, and the plunger tip 28a pours the molten metal 31. Press to cast into the cavity 27. Reference numeral 32 denotes an auxiliary cylinder consisting of a cylinder 32a provided on the rod portion 28b of the plunger 28 and a piston rod 32b that moves forward and backward by pressure oil fed into the cylinder 32a, and is activated at the final stage of pouring the molten metal by the plunger 28. , the piston rod 32b is configured to protrude from the plunger tip 28a to perform feeding.

Such a molten metal casting apparatus is provided with a device for reducing the diameter of the molten metal passage and shearing the solidified molten metal. That is, the fixed mold 23 has an upper plate 23 formed in a rectangular shape, stacked one on top of the other and joined with bolts.
b and a lower plate 23c, and as shown in FIG. sliding grooves 34, 35 on both sides formed in
are provided continuously, and these guide holes 3
3 and the sliding grooves 34, 35 have cylindrical shapes with upward openings closed by the upper plate 23b. and,
A gate plate 36 for shearing the molten metal solidified material is movably fitted into the cylindrical guide hole 33 and the sliding grooves 34, 35. This gate plate 36 has a sleeve hole 37 into which the casting sleeve 30 is fitted.
and a molten metal hole 38 having the same diameter as the inner hole of the injection sleeve 30.
and a constriction hole 39 with a considerably smaller diameter than this,
These holes 3 are formed continuously and concentrically in this order from the injection sleeve 30 side, and the gate plate 36 is connected to these holes 3.
7, 38, and 39 are divided into one gate plate 40 and the other gate plate 41. The gate plate 40 and the gate plate 41 are
The guide portions 40a, 41a slidably fit into the guide hole 33, and the sliding portions 40b, 41b slideably fit into the slide grooves 34, 35, respectively.
The fitting intersection of the guide parts 40a and 41a is, for example, about 0.5 mm on one side, and the fitting tolerance of the sliding parts 40b and 41b is about 0.1 mm or less on both sides. is formed. The gate plates 40, 41 configured in this way are fixed to piston rods 42a, 43a of cylinders 42, 43 mounted on the lower plate 23c of the fixed mold 23, respectively, and are driven by the respective cylinders 42, 43. Configured to move. In this embodiment, for example, the stroke of the right cylinder 42 is approximately 15 mm to the left from the position shown in FIGS. 1 and 2, and the stroke of the left cylinder 43 is approximately 15 mm to the left from the position shown in FIGS. It is set to 30mm. When pouring molten metal into the cavity 27, pressure is applied to the head end side of the left cylinder 43, pushing the gate plates 40, 41 to the right in the figure, and shoulder 40c of the right gate plate 40.
is pressed against the shoulder 23d of the lower plate 23c of the fixed mold 23, thereby restricting movement of the gate plates 40, 41 to the right in the figure. Of course, this movement to the right can be restricted by the right cylinder 42, but in this way, the shoulders 23d, 40
If you do it in c, the gate plate 4 at the time of casting
Position setting adjustment of 0 and 41 is performed reliably and easily. With this structure, when the molten metal 31 filled into the cavity 27 is solidified, pressure is applied to the head end side of the cylinder 42 or the head end side of the cylinder 42 and the rod end side of the cylinder 43 are applied. At the same time, pressure is applied to the gate plates 40 and 41, and both the gate plates 40 and 41 move to the left in FIG. Shear the biscuit part in between.
After this, both the gate plate 40 and the gate plate 41 move in the backward direction by approximately 15 mm in a direction away from each other.
The sheared biscuits are separated from the gate plates 40, 41 to ensure that they fall.

Furthermore, a pair of cylinders 44 and 45 as regulating members for regulating the movement of the gate plates 40 and 41 in a direction perpendicular to the movement direction are provided on both the front and rear sides of the fixed mold 23, and the piston rods 44a and 45a are connected to the fixed molds. The piston rods 44a and 4 are fitted into rod holes provided in the lower plate 23c of the mold 23, and by applying pressure to the head end side, the piston rods 44a, 4
The tip of the gate plate 5a is configured to be pressed against the end face of the center portion of the gate plates 40, 41. The tip of each piston rod 44a, 45a, the gate plate 40,
As shown in FIG.
41 movement direction and piston rods 44a, 45a
Slope portions 44b to 45b are provided which are oblique to both directions of movement. Slope portion 44
b, 45b are the gate plates 40, 41 due to the force in the forward direction of the piston rods 44a, 45a.
The gate plates 40 and 41 are sloped so that force acts in the direction in which the gate plates 40 and 41 are strongly joined to each other, and the gate plates 40 and 41 can be reliably and easily joined with a small force. When the gate plates 40, 41 are moved, the piston rods 44a, 45a are moved back and the gate plates 40, 41 are moved.
It is designed to be able to deviate from 0.41.

The operation of the die casting machine configured as described above will be explained based on FIGS. 3a to 3f. Figure 3a
In the drawing, the casting sleeve 30 is lowered together with the block 29, and the plunger 28 is lowered within the casting sleeve 30. Further, the casting sleeve 30 is filled with a predetermined amount of molten metal 31, which is injected while the casting sleeve 30 is tilted. Piston rod 42a of air cylinder 42 shown in FIG.
is moving backward, and the piston rod 43a of the cylinder 43 is moving forward, and the shoulder 40 of the gate plate 40
c comes into contact with the shoulder portion 23d of the lower plate 23c of the fixed mold 23, and is restricted from moving to the right in the figure.
Also, the piston rods 4 of both cylinders 44, 45
4a, 45a are moving forward, and slope portions 44b, 4
5b, and the gate plates 40, 41 are sufficiently pressed against each other at the joint surfaces at their tips. In this state, the block 29 is raised by a cylinder (not shown), and the casting sleeve 30 is inserted into the sleeve hole 23a of the fixed mold 23, the gate plate 40,
41 into the sleeve hole 37, and then the plunger 28 is raised by the casting cylinder.
The plunger tip 28a pushes up the molten metal 31 and casts it into the cavity 27. At the end of casting, as shown in FIG. 3b, the piston rod 32b of the auxiliary cylinder 32 rises and protrudes from the plunger tip 28a to perform feeding. Casting sleeve 3 during casting
The shell generated on the inner surface of gate plate 40, 4
The rise is restricted by the circumferential edge of the constricted hole 39 of No. 1, so that it is compressed into a bellows shape and does not enter the cavity 27. When filling the cavity 27 with the molten metal 31, the gate plates 40, 41 tend to thermally expand due to the high heat of the molten metal 31, and the molten metal 31
Due to the casting process, a large pressure of several 100 to 1000 kg/cm ³ acts on the inside of the gate plates 40 and 41, causing the gate plates 40 and 41 to bulge outward. , 41, the piston rods 44a, 45a of the cylinders 44, 45 are pressed by cylinder pressure, so that the gate plates 40, 41 swell as the molten metal 31 is poured, and the guide portions 40a, 41a, etc. thereof are guided. It will not be pressed against the hole 33 or the like and will not seize or prevent its sliding movement. In addition, the shear plates 40 and 41 are deformed,
This prevents the constriction hole 39 and the joint surfaces of the gate plates 40 and 41 from opening, and the movement of the gate plates 40 and 41 becomes heavy during the subsequent shearing operation of the solidified molten metal, and burrs and solid objects do not open. No biting occurs. In this case, pressure is acting on the head end side of the piston rod 43a of the opening/closing cylinder 43 for one gate plate 41, pushing the gate plate 41 to the left, and the shoulder 40c of the other gate plate 40 is in contact with the shoulder 23d of the lower plate 23c and is restricted from moving to the right, so the gate plates 40, 41 do not move in the opening/closing direction either. In addition, gate plate 4
0 may restrict movement to the right by applying pressure to the head end side of the cylinder 42 for opening and closing the gate plate 40.

In this device, the piston rod 44a,
Since the tip of the piston rod 45a is pressed against the side surface of the tip joint of the guide portions 40a, 41a of the gate plates 40, 41 via the slopes 44b, 45b, the force from the piston rods 44a, 45a is applied to the gate plates 40, 4.
1 acts as a force in the direction of pressing them together.
Therefore, with a relatively small force, the gate plate 40,
41 can be reliably and easily joined to each other.

After the molten metal 31 in the cavity 27 is solidified and the injection sleeve 30 is lowered, the piston rods 44a, 45a of the front and rear air cylinders 44, 45 are moved back, and the gate plates 40, 41 are released from the pressure. Then, when the piston rod 42a of the right cylinder 42 is advanced, for example, by about 15 mm, and at the same time the piston rod 43a of the air cylinder 43 is retreated by the same amount, the solidified molten metal flows into the runner hole 46, as shown in FIG. 3c. It is sheared from the boundary with the constriction hole 39. In this case, the gate plates 40, 41
is not pressed by the piston rods 44a and 45a, so it moves smoothly.

Next, before opening the mold, as shown in FIG. 3d, the piston rod 42a of the right cylinder 42 is moved back to its original forward position by about 15 mm, and at the same time, the piston rod 42a of the left cylinder 43 is moved back.
For example, move a further by 15 mm than the position shown in Figure 3 c.
When the gate plates 4 on both sides are moved back in the same direction,
0.41 separates from the sheared compound, so-called biscuit 47, which was attached to it, so that the biscuit 47 falls. At this time, as shown in FIG. 3d, a convex portion is provided at the tip to fit into a concave portion on the lower surface of the biscuit 47 (a hole formed when the tip of the piston rod 32b of the auxiliary cylinder 32 operates during the feeder operation). The formed biscuit support rod 47a is pressed from below the biscuit 47 to support the biscuit 47 and prevent it from moving from side to side, and then, when the gate plates 40 and 41 are opened, the biscuit 47 and the gate plates 40 and 41 are held together. Even when the force is strong, the biscuit 47 does not escape, and the biscuit 47 can be reliably dropped downward.
FIG. 3e shows the biscuit 47 falling. After the biscuit 47 has fallen, the piston rod 43a of the cylinder 43 is advanced, for example, by about 30 mm, as shown, to return it to its original position at the time of injection.

Next, as shown in FIG. 3f, the movable platen 2
When the mold is opened by raising 2, the cavity 27
Since the product inside is held on the movable mold 24 side and rises, the cores 25 and 26 on both sides, which have risen together with the movable mold 24, are opened outward and separated from the product.
When the ejecting pin of the ejecting device (not shown) is lowered, the product 48 falls. Thereupon, the product 48 is received by an arm of a product take-out device (not shown), transported and discharged outside the machine. After taking out the product, one casting cycle is completed by clamping the mold. Since the product 48 that was taken out comes with a runner 49,
This may be cut off with a cutting tool of a lathe, or a thin wall portion may be provided at the base of the runner 49 and the runner 49 may be folded with a punch or the like in the direction shown by arrow F in FIG. 3F.

The above example shows an example in which the present invention is applied to a normal vertical mold clamping and vertical casting die casting machine, but in this case, the casting device, product ejecting device, mold spraying device, etc. are installed in separate stations. It can also be applied to a rotary die-casting machine installed in a rotary die-casting machine.
That is, both the molds 23 and 24 are held openable and closable at positions that divide the rotary table into three equal parts in the circumferential direction, and an injection station, a product ejection station, and a mold spray station are arranged on the orbit of the rotary table. , pouring molten metal into the mold at the casting station, which stops intermittently at each station, and biscuit 4 at the product take-out station.
Shearing, mold opening, extrusion and ejection of the product in step 7, and spraying of the mold at the mold spray station are respectively performed.

Further, in this device, the convex portion 24a of the movable mold 24 is made high, and the convex portion 23e of the fixed mold 23 is made low. By doing this, the aluminum foil as a cast product is cast upside down, and the decorative side on which the design is applied becomes the runner 46 side, but the large diameter biscuit 14 as shown in Fig. 5 is not attached to this decorative side. Since only a thin runner is included, there is a degree of freedom in design.

Although the example in which the gate plates 40 and 41 are used for shearing the solidified material has been described above, the gate plates 40 and 41 can also be used for opening and closing the melt passage. FIG. 4 is a vertical cross-sectional view of the main parts of another embodiment of this kind corresponding to FIG. Reference numerals are given and explanations thereof are omitted. In this example,
The gate plate 40A and the gate plate 41A form the cylinder 4.
These left and right gate plates 4 are connected to piston rods 42a and 43a of 2A and 43A, respectively.
0A, 41A are piston rods 42a, 43a
They are configured to advance and retreat in opposite directions as the two move forward and backward. The strokes of the cylinders 42A, 43A are larger than those of the previous embodiment, and the gate plates 40A,
At the advance limit of 41A, the molten metal passage is marked in the figure.
It has a small diameter indicated by D ₁ , and the gate plates 40A and 41A
At the retraction limit of , the molten metal passage is connected to the casting sleeve 3
The inner diameter D ₃ of the recess 30 a provided inside the upper end of the casting sleeve 30 is larger than the inner diameter D ₂ of the casting sleeve 30 . Note that the reason why the recess 30a is provided here is to capture the shell formed on the inner surface of the casting sleeve 30, and to further remove the shell from the cavity 2.
This is to prevent it from falling within 7.

With this configuration, the gate plates 40A and 41A are moved forward as shown in the figure to make the molten metal passage smaller, and the front and rear cylinders 44 and 45 are actuated in the same way as in the previous embodiment to move the piston rod 44a. , 45a, press the side surfaces of the gate plates 40A, 41A in the same manner as shown in FIG. After doing this, when the plunger 28 is moved forward and the molten metal is injected into the cavity 27,
Casting sleeve 30 inner peripheral surface and plunger tip 28
The shell formed along the end face of a is pushed by the plunger tip 28a and tries to head toward the cavity 27, but there are gate plates 40A and 41
Since there is A, Ciel has gate plates 40A and 41A.
It is compressed into a bellows-like shape while entering the recess 30a between the end face of the peripheral edge thereof, and does not enter into the cavity 27. After the molten metal injected into the cavity 27 is solidified and cooled, the front and rear piston rods 44a, 45a are moved back and the gate plates 40A, 4
The movement restriction of 1A is lifted, and the piston rod 42a,
43a is moved back to open the gate plates 40A and 41A until they have the same diameter as the inner diameter of the recess 30a of the injection sleeve 30. Then, when the mold is opened, the product in the cavity 27 is held by the movable mold 24 side and rises, but since the gate plates 40A and 41A are open, the biscuits formed on the lower side of the gate plates 40A and 41A are There are also rises that come with the product. Thereafter, the biscuit can be removed from the product taken out from the cavity 27 in the same manner as in the previous embodiment by breaking the thin solidified material solidified within the holes of the gate plates 40A, 41A with a hammer or the like.

In addition, in each of the above embodiments, the gate plates 40, 41
An example has been shown in which the regulating members for regulating the movement of (40A, 41A) in the front and rear directions are formed into cylinders 44 and 45 so as to be movable in the front and rear directions. One side may be fixed at a movement restriction position, and only one movement restriction member may be formed as a cylinder or the like to be movable.

In the above embodiments, the gate plates 40 and 41 were divided at the center of the constriction hole 39 having a circular cross section, but these could also be done by making the constriction hole 39 a polygonal cross section or by dividing the constriction hole 39 into a polygonal cross section. The tip contact surface may be located at a position slightly away from the center of the constriction hole 39 or at a position on one rear end surface of the constriction hole 39 having a polygonal cross section.

Furthermore, although each of the above-mentioned embodiments shows an example in which the present invention is applied to a die-casting machine for casting aluminum foil, the product is not limited to aluminum foil, and any product may be used. Further, the present invention can be applied not only to die casting machines but also to injection molding machines for plastics.

[Effects of the Invention] As is clear from the above explanation. According to the present invention, in a vertical mold clamping and vertical casting mold injection molding apparatus,
In the melt passage between the casting sleeve and the mold cavity, there is a hole with a smaller cross-sectional area than the inner hole of the casting sleeve, and the gate plate, which is divided into parts with this hole as a boundary, is moved horizontally. By making the molten material movable and making the molten material passage smaller than before, excess solidified material such as biscuits attached to the product can be reduced by shearing the solidified material in the reduced passageway with the gate plate. This reduces the amount of molten metal consumed and is economical, and the runner part of the product is smaller, so even if this part becomes a decorative surface, the aesthetics will not be impaired. This makes it possible to attach the device, giving you more freedom in design. In addition, by reducing the size of the molten material passage, the molten solidified material that solidifies within the casting sleeve during casting is blocked by the reduced passage and does not enter the cavity, thereby significantly improving the quality of the product. If the molten solidified material is not sheared by the gate plate, the solidified material in the casting sleeve can be added to the product and cast by opening the gate plate when the mold is opened. Furthermore, a regulating member that regulates the movement of the gate plate in a direction that intersects with the moving direction is provided on the side of the gate plate, and a regulating member that regulates the movement direction of the gate plate and the regulating member is provided on the joint surface between the regulating member and the side surface of the gate plate. By providing slopes that are oblique to both directions of movement of the member, and at least one of which is movable, the gate plate can be moved with a relatively small force during pouring of the molten material. Movement can be reliably and easily controlled, and thermal expansion of the gate plate and the phenomenon in which the gate plate tends to bulge outward due to internal pressure due to casting are controlled, so the gate plate is prevented from deforming. The necessary gap for sliding will not disappear, and burrs and solid objects will not get stuck in the gap due to deformation. Therefore, when the gate plate is moved, if the regulating member is released, the gate plate can be moved. The board moves smoothly.

[Brief explanation of drawings]

1 to 4 show an embodiment of the casting apparatus according to the present invention, and FIG. 1 is a vertical cross-sectional view of the main part of a vertical mold clamping vertical casting die casting machine to which this is applied;
Figure 2 is a sectional view taken along the - line in Figure 1, and Figures 3 a to f.
4 is a longitudinal sectional view of the main part shown for explaining the operation, FIG. 4 is a longitudinal sectional view of the main part showing another embodiment of the present invention corresponding to FIG. 1, and FIG. 5 is a vertical sectional view of the conventional FIG. 2 is a vertical cross-sectional view of the main parts of the vertical casting type die-casting machine. 23...Fixed mold, 23b...Top plate, 23c...
...Lower plate, 23d...Shoulder part, 24...Movable mold, 2
7... Cavity, 28... Plunger, 28a
... Plunger tip, 30 ... Cast sleeve,
31... Molten metal, 33... Guide hole, 34, 35...
Sliding groove, 36, 40, 40A, 41, 41A...
Gate plate, 39... waist hole, 40a, 41a...
...Guiding part, 40b, 41b...Sliding part, 42, 4
3, 42A, 43A, 44, 45... cylinder,
42a, 43a, 44a, 45a...Piston rod, 47...Biscuit, 48...Product.

Claims (1)

[Claims] 1. In a casting apparatus that casts the molten material in a vertical casting sleeve into the cavity of a vertically clamped mold from below, the molten material between the casting sleeve and the cavity A gate plate having a hole having a cross-sectional area smaller than the inner hole of the casting sleeve is formed in the passageway divided by a vertical plane passing through the hole, and the vertical plane allows both gate plates to be fitted together. A regulating member is provided movably in a horizontal direction intersecting with the direction of movement of the gate plate, and a regulating member for regulating movement of the gate plate in a horizontal direction intersecting with the moving direction of the gate plate is movably provided on the side of the vertical surface portion of the gate plate. , and the casting molding is provided with a sloped portion that is oblique with respect to both the moving direction of the gate plate and the moving direction of the regulating member on the joint surface between the regulating member and the side surface of the vertical surface portion of the gate plate. Device.