JPH0446667B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vertical mold clamping or vertical injection mold in which molten metal or molten resin is injected into the cavity of a vertically clamped mold from directly below the cavity. This invention relates to an injection molding device.

[Conventional technology]

Injection molding equipment such as die casting machines or injection molding machines for plastics is classified into vertical clamping molds and horizontal clamping molds according to the mold clamping direction, and into vertical injection molds and horizontal injection molds according to the injection direction. be done.

FIG. 5 is a longitudinal cross-sectional view of the main parts of a conventional vertical mold clamping and vertical injection 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.
There is a cavity 7 which is a space having the same shape as the aluminum foil between the convex part and the half-ring-shaped cores 5 and 6.
is formed. On the other hand, below the machine base to which the fixed platen 1 is fixed, an injection cylinder (not shown) is arranged so as to be able to stand up and tilt freely.
9 is a plunger that is moved up and down by this injection cylinder, and 9 is a block that is moved up and down by another cylinder on the injection cylinder side. An injection sleeve 10 into which a plunger 8 is fitted is fixed concentrically to the upper end of this block 9, and when the block 9 is raised, the injection sleeve 10 is moved to the sleeve of the stationary mold 3 as shown in the figure. It is fitted into the hole 3a.
Furthermore, the injection 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 injection sleeve 10 is pulled out from the sleeve hole 3a, and the entire injection cylinder is removed by arrow B in the figure.
It is configured to be tilted in the direction shown by , inject the molten metal 11 into the injection sleeve 10, and then stand up.

With this configuration, as shown in the figure, after the mold is clamped, the injection cylinder is tilted with the block 9 and the injection sleeve 10 being lowered, and the molten metal 11 is injected into the injection sleeve 10.
The injection cylinder is erected, the block 9 is raised, and the injection sleeve 10 is fitted into the sleeve hole 3a. When pressure oil is fed into the injection 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 injects it into the cavity 7. plunger tip 8
When a 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.
After waiting for the molten metal 11 to solidify, the movable platen 2 is raised to open the mold, the cores 5 and 6 are moved outward, and the solidified product is ejected from the cavity 7. In this case, the broken line 12 in the figure is the lower end of the product, and this product includes a solidified molten metal, a so-called biscuit, at a location indicated by the reference numeral 14 between the broken line 12 and the chain line 13, which is the upper limit of the plunger tip 8a. do. This biscuit is cut in a separate process after the product is taken out.

[Problem that the invention seeks to solve]

However, in such conventional vertical mold clamping and vertical injection die casting machines, the diameter of the molten metal passage between the cavity 7 and the injection sleeve 10 is set to be smaller than the inner diameter of the injection sleeve 10 in order to remove the product after opening the mold. Since it cannot be made smaller, the biscuit becomes larger and requires more molten metal, which is not only uneconomical, but also, for example, when the surface of aluminum foil, which is indicated by the broken line 12 in the figure, becomes a decorative surface. Since this is the cut surface of the biscuit, there is a problem that the surface becomes rough or that a design cannot be freely applied to this portion using a mold. Furthermore, during casting, the shell, which is the solidified phase of the molten metal, is often pushed up by the plunger tip 8a and enters the cavity 7, which remains inside the product and deteriorates the quality of the product. Something happened. Therefore, conventionally,
In order to block the intrusion of the shell 15, attempts have been made to provide a wire mesh called punching metal at the location indicated by the broken line 12, or to fit a ring into the upper end of the inner hole of the injection sleeve 10, but these methods are troublesome to handle. Therefore, there was a problem that the amount of consumables consumed increased.

[Means for solving problems]

In order to solve these problems, the present invention provides a sleeve hole in which the upper end of the injection sleeve is inserted from below into the melt passage between the injection sleeve and the cavity of a vertical mold clamping and vertical injection type injection molding device. on the lower side, and a hole on the upper side with a smaller cross-sectional area than the inner hole of the injection sleeve, and the molten solidified material shear plate, which is divided and formed with the center of this hole as a border, can be moved horizontally. It was established in

[Effect]

Position the shear plate at the center of the melt passage in the hole, raise the injection sleeve, insert and engage the upper end of the injection sleeve into the sleeve hole on the lower side of the shear plate, and align the axis. When the shell is injected into the cavity, the shell generated within the injection sleeve is blocked before the hole in the shear plate and remains within the injection sleeve. After the molten material filled in the cavity has solidified, the injection sleeve is lowered and removed from the shear plate, and both divided shear plates are moved horizontally in the same direction. Since the hole in the shear plate is blocked between the runner part of the mold, when the mold is opened, the product is held on the movable mold side, leaving the biscuit below the shear plate, and by ejecting it, the injection cycle is completed. ends.

〔Example〕

1 to 3 show an example in which the injection molding apparatus according to the present invention is applied to a vertical mold clamping, vertical injection type die casting machine.
The figure is a sectional view CC of FIG. 1, and FIGS. 3 a to 3 f are longitudinal sectional views of main parts shown for explaining the operation. In the figure, the vertical mold clamping and vertical injection die casting machine includes a fixed platen 21 fixed on a machine base (not shown) and a movable platen 22 that moves up and down along tie rods (not shown) installed at its four corners. Both platens 21 and 22 are equipped with
A rectangular fixed mold 23 and a movable mold 24 are each fixed. Then, a mold clamping cylinder (not shown) above the movable platen 22 closes the movable platen 2.
By raising and lowering the movable mold 24, the movable mold 24 is clamped to the fixed mold 23 and opened. Further, between the upper and lower molds 24 and 23, a pair of cores 25 and 26 having semi-circular inner circumferential surfaces are installed in the movable mold 2.
It is supported and interposed on the 4 side, and is configured to move forward and backward in the horizontal direction indicated by reference numeral D in the figure 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, and the mold 2
A cavity 27, which is a space having the same shape as the aluminum foil, is formed between the protrusions 3 and 24 and the half-ring-shaped cores 25 and 26. On the other hand, below the machine base to which the fixed platen 21 is fixed,
An injection cylinder (not shown) is arranged so as to be able to stand up and tilt freely, 28 is a plunger that moves up and down with this injection cylinder, and 29 is a block that is moved up and down with another cylinder on the injection cylinder side. An injection sleeve 30 into which a plunger 28 is fitted is concentrically fixed to the upper end of this block 29, and when the block 29 is raised, the injection sleeve 30 is moved to the sleeve of the fixed mold 23 as shown in the figure. It is inserted into the hole 23a. Furthermore, the injection sleeve 30 and the block 29 are connected to the fixed platen 21.
The block 29 is engaged with the notch 21a of the block 29.
By lowering the injection sleeve 30 into the sleeve hole 23
a and tilt the entire injection cylinder in the direction shown by arrow E in the figure to release the molten metal 3 in the injection sleeve 30.
1 is injected and then erected. The plunger 28 has a plunger tip 28a as a head that is fitted into the inner hole of the injection sleeve 30.
The plunger 2 is equipped with an injection cylinder.
8 rises and pushes the molten metal 31 with the plunger tip 28a and injects it into the cavity 27. Reference numeral 32 denotes an auxiliary cylinder consisting of a cylinder 32a provided on the rod 28b of the plunger 28 and a piston rod 32b that moves forward and backward by pressure oil fed into the cylinder 32a. It is configured to project 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 that is stacked one on top of the other and joined with bolts.
b and a lower plate 23c, and the lower plate 23c
As shown in FIG. 2, there is a central guide hole 33 formed in a substantially square concave shape, and sliding grooves 34 and 35 on both sides formed in a concave shape with a smaller width.
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 shear plate 36 for solidified molten metal is movably fitted into the cylindrical guide hole 33 and the sliding grooves 34, 35. This shearing plate 36 has a sleeve hole 37 into which the injection sleeve 30 is fitted, a molten metal hole 38 having the same diameter as the inner hole of the injection sleeve 30, and a constricted hole 39 having a considerably smaller diameter than the inner hole of the injection sleeve 30. They are formed concentrically in this order from the side, and the shear plate 36 connects these holes 37, 38, 3.
It is divided into a shearing plate (right) 40 and a shearing plate (left) 41 with the center of 9 as a boundary. These shearing plates (right) 40 and shearing plates (left) 41 each have a guide portion 40 that is slidably fitted into the guide hole 33.
a, 41a, and sliding portions 40b, 41b that slidably fit into the sliding grooves 34, 35 are formed into a T-shape, and the fitting tolerance of the guide portions 40a, 41b is 0.5 mm on one side. Furthermore, the fitting tolerance of the sliding parts 40b and 41b is set to about 0.1 mm or less on both sides. The shearing plates 40 and 41 configured in this manner are fixed to piston rods 42a and 43a of cylinders 42 and 43 respectively mounted on the lower plate 23c of the fixed mold 23, and are driven by the respective cylinders 42 and 43. is configured to be moved. In this embodiment, the stroke of the right cylinder 42 is approximately 15 degrees to the left from the position shown in the figure.
mm, and the stroke of the left cylinder 43 is set to approximately 30 mm to the left from the position in the figure. When injecting the molten metal into the cavity 27, pressure is applied to the head end side of the left cylinder 43, pushing the shear plates 40 and 41 to the right in the figure, and the shoulder 40c of the right shear plate 40 is pressed against the fixed plate. The shear plates 40 and 41 are pressed against the shoulder portion 23d of the lower plate 23c of the mold 23, and movement of the shear plates 40 and 41 to the right in the figure is restricted. Of course, this movement to the right can also be restricted by the right cylinder 42, but
If the shoulder portions 23d and 40c are used in this way, the position setting adjustment of the shear plates 40 and 41 during injection can be 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 pressure is applied to the head end side of the cylinder 42 and the rod end side of the cylinder 43. At the same time, pressure is applied to the shear plate (right) 40 and shear plate (left) 41, which move approximately 15 mm to the left in the figure, shearing the solidified molten material. After this, pressure is applied to the rod end side of the cylinder 42 and the rod end side of the cylinder 43, and the shear plate (right) 40 and the shear plate (left) 41 are both moved approximately 15 mm in a direction away from each other, causing shearing. The biscuits are separated from the shear plates 40 and 41 to ensure that they fall. Further, on both the front and rear sides of the fixed mold 23, a pair of cylinders 44 and 45 are provided as regulating members that prevent the shear plates 40 and 41 from moving in a direction perpendicular to the movement direction.
a, 45a are fitted into rod holes provided in the lower plate 23c of the fixed mold 23, and by applying pressure to the head end side, the tips of the piston rods 43a, 44a are moved to the center of the shear plates 40, 41. It is configured to be pressed against the end surface of the part. When the shearing plates 40, 41 move, the piston rods 44a, 45a move back and the shearing plates 40, 41 move backward.
Move away from 0,41. Note that a runner hole 46 is located between the cavity 27 and the constriction hole 39 in the upper plate 23.
It is perforated in b.

The operation of the die casting machine configured as described above will be explained based on FIGS. 3a to 3f. In FIG. 3a, the injection sleeve 30 has been lowered together with the block 29, and the plunger 28 has been lowered within the injection sleeve 30. Further, the injection sleeve 30 is filled with a predetermined amount of molten metal 31 injected while the injection sleeve 30 is tilted. The piston rod 42a of the cylinder 42 shown in FIG. 2 is retracted, and the piston rod 43a of the cylinder 43 is
is moving forward, and the shoulder 40c of the shear plate 40 is pressed against the shoulder 23d of the lower plate 23c of the fixed mold 23. Also, the piston rods 44a, 45a of the cylinders 44, 45 are moving forward, and the shear plates 40, 45a are moving forward.
1. In this state, the block 29 was raised by a cylinder (not shown), and the injection sleeve 30 was inserted into the sleeve hole 23a of the fixed mold 23 and the sleeve hole 37 of the shear plates 40, 41, as shown in FIG. 3b. Afterwards, when the plunger 28 is raised by the injection cylinder, the plunger tip 28a pushes up the molten metal 31 and injects it into the cavity 27. At the end of injection, the piston rod 32b of the auxiliary cylinder 32 rises and protrudes from the plunger tip 28a to perform feeding. The shell generated within the injection sleeve 30 during injection is transferred to the shear plate 4
It is restricted from rising at the peripheral edge of the constricted hole 39 of 0.41 and is compressed into a bellows shape, so that it does not enter into the cavity 27. When filling the cavity 27 with the molten metal 31, the high heat of the molten metal 31 causes the shear plate 4 to
0 and 41 try to thermally expand, and a large pressure of 1000 Kg/cm ² acts on the inside of the shear plates 40 and 41 due to the injection of the molten metal 31, causing the shear plates 40 and 41 to expand thermally.
41 tries to bulge outward, but since the piston rods 44a, 45a of the cylinders 44, 45 are pressed against the side surfaces of the shearing plates 40, 41 by cylinder pressure, the shearing is prevented by the injection of the riser. Board 4
0 and 41 are swollen and their guide portions 40a and 41a
etc. will not be pressed against the guide hole 33 etc. and seize it, or its sliding will be prevented. In addition, the shear plates 40 and 41 will not be deformed and the constricted hole 39 will open, and the movement of the shear plates 40 and 41 will become heavy during the subsequent shearing operation of the molten metal solidified material, and burrs and solidified material will not be eaten. No congestion occurs. In this case, pressure is acting on the head end side of the piston rod 43a of the opening/closing cylinder 43 of the shearing plate (left) 41.
is pushed to the right, shoulder 4 of shear plate (right) 40
The shear plate 4
0 and 41 do not move in the opening/closing direction either. Of course, in this case, pressure may be applied to the head end side of the opening/closing cylinder 42 of the shear plate (right) 40 to restrict its movement to the right.

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 hydraulic cylinders 44, 45 are moved back, and the shear 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 cylinder 43 is retreated by the same amount, as shown in FIG. It is sheared from the border with 39. In this case, the shear plates 40, 41 are not pressed by the piston rods 44a, 45a, and therefore move smoothly.

Next, prior to mold opening, as shown in FIG. 3d, the piston rod 42a of the right cylinder 42 is moved back, for example, by about 15 mm to its original position before being advanced, and at the same time, the piston rod 43 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 shear plates 40 on both sides are moved back to the left,
41 separates from the sheared compound so-called biscuit 47 that was attached to it, so the biscuit 47
falls. At this time, as shown by the chain line in FIG. 3d, a convex portion is provided at the tip of the biscuit 47 to fit into a concave portion (a hole formed when the tip of the piston rod 32b of the auxiliary cylinder 32 operates during the feeder operation) on the lower surface of the biscuit 47. The formed biscuit support rod 47a is pressed against the biscuit 47 from below to support the biscuit 47 and prevent it from moving from side to side.
41, the biscuit 47 and shear plates 40, 4
Even when the pecking force of 1 is strong, the biscuit 47 does not escape, and the biscuit 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.

Then, as shown in FIG. 3f, the movable platen 22
When the mold is opened by raising the mold, the product in the cavity 27 is held on the movable mold 24 side and rises, so the cores 2 on both sides rise together with the movable mold 24.
After opening 5 and 26 outward and separating them from the product, when a protrusion pin of a protrusion device (not shown) is lowered, the product 48 falls. Therefore, the product 48 is received by an arm of a product unloading device (not shown) and transported outside the machine.
discharge. One casting cycle is completed by clamping the mold after taking out the product. Since the product 48 that has been taken out has a runner 49 attached to it, it can be cut off using a cutting tool on a lathe, or a thin section may be provided at the base of the runner 49 and then punched with a punch or the like from the direction shown by arrow F in FIG. 3f. Alternatively, the runner 49 may be folded.

The above example shows an example in which the present invention is applied to a normal vertical mold clamping and vertical injection die casting machine, but in reality, the injection device, product ejection device, mold spray device, etc. are installed in separate stations. It is desirable to apply this method to rotary die-casting machines. That is, both 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 press station are arranged on the orbit of the rotary table. The mold stops intermittently at each station, and the injection station injects the molten metal, the product take-out station shears the biscuit 47, opens the mold, extrudes and takes out the product, and the mold spray station performs the following operations: Have them do their own spraying, etc.

FIG. 4 is a longitudinal cross-sectional view of the main parts of a die-casting machine showing another embodiment of the present invention corresponding to FIG. 1, and members having the same structure as those shown in FIGS. , and the explanation thereof will be omitted. In this example, as is clear from a comparison with FIG.
The convex portion 24a of the movable mold 24 is raised, and the fixed mold 2
The convex portion 23d of No. 3 is lowered. By doing this, the aluminum foil as a cast product is cast upside down, and the decorative surface side on which the design is applied becomes the runner 46 side. However, since the decorative surface does not have the biscuit 14 with a large diameter as shown in FIG. 5, but only a thin runner, a degree of freedom in design can be obtained.

In addition, although each of the above 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.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a vertical mold clamping and vertical injection molding apparatus,
The melt passage between the injection sleeve and the mold cavity has a sleeve hole on the lower side into which the upper end of the injection sleeve is inserted from below, and a hole with a smaller cross-sectional area than the inner hole of the injection sleeve on the upper side. has, and
A shear plate for the molten solidified material, which is divided and formed with the center of this hole as a boundary, is provided so as to be movable in the horizontal direction, and the molten material passage is made smaller than before. By configuring the material to be sheared at the injection position, the surplus solidified material attached to the product becomes smaller, reducing the amount of molten metal consumed, which is economical, and the runner part of the product becomes smaller, so it is possible to Even if it becomes a decorative surface, the aesthetic appearance is not impaired, and it is possible to apply a design using a mold, providing a degree of freedom in design. Further, by reducing the size of the molten material passage, the molten metal that solidifies within the injection sleeve during injection is blocked by the reduced size passage and does not enter the cavity, thereby significantly improving the quality of the product.

In addition, a sleeve hole was provided on the lower side of the horizontally movable molten solidified material shearing plate, into which the upper end of the injection sleeve was inserted from below. By simply engaging the shearing plate and the injection sleeve, the axes of the shear plate and the injection sleeve can always be reliably and easily aligned, and problems will not occur due to the axes being misaligned due to thermal expansion or the like. In other words, if there is no engagement between the shearing plates and the injection sleeve, the position of the shearing plates will be distorted due to the difference in the stopped state and the influence of thermal expansion, and the abutment surface between the shearing plates, that is, the axis of the constricted hole. It may happen that the center is not aligned with the axis of the injection sleeve and the axis of the runner hole of the stationary mold.

If such misalignment of the axes occurs, the communication area between the waist hole and the runner hole will be reduced, and the molten metal hole, which is the large diameter hole on the injection sleeve side of the shear plate, will be misaligned with the inner hole of the injection sleeve.

If the constriction hole and the runner hole are misaligned and the cross-sectional area of the communicating part becomes smaller, the flow condition of the molten metal during injection will naturally deteriorate, and the force exerted by the injection pressure on the molten metal will become smaller. Good quality cast products cannot be obtained.

On the other hand, if the molten metal hole, which is a large diameter hole on the injection sleeve side of the shearing plate, deviates from the inner hole of the injection sleeve, the upper end of the plunger tip cannot be inserted all the way into the molten metal hole. As a result, it will be appreciated that any biscuit parts remaining after injection will remain both in the melt hole and in the upper end of the bore of the injection sleeve or in the upper end of the hole below the shear plate.

Therefore, even if an attempt is made to cut the solidified material between the upper surface of the constricted hole 39 and the lower surface of the runner hole by moving the shearing plate laterally after the molten metal has cooled and solidified during injection molding, the lower end surface of the molten metal hole will be cut. Since a large-diameter biscuit remains, the shear plate cannot be moved with a small amount of force and cannot cut the biscuit. Therefore, the cast product cannot be removed from the mold together with the biscuit.

Moreover, the thickness of the biscuit also increases, which is uneconomical.

As described above, if the axes of the shear plate, injection sleeve, and runner hole are misaligned, the above-mentioned problems may occur.

In this regard, in the present invention, a molten solidified material shearing plate having a sleeve hole on the lower side into which the upper end of the injection sleeve is inserted from below is provided so as to be movable in the horizontal direction. As a result, even if thermal expansion occurs in the shear plate, etc., the axis of the molten metal hole in the shear plate will always align with the axis of the injection sleeve, and the inner peripheral surface of the molten metal hole will always align with the axis of the injection sleeve. always coincides with the inner peripheral surface of the injection sleeve on the same axis. Furthermore, as a result, the axis of the waist hole above the shear plate always coincides with the axis of the runner hole.

In this way, in the present invention, since the axes of the waist hole and the runner hole always coincide, the cross section of the passage from the waist hole to the runner hole has a necessary and sufficient cross-sectional area, and the passage from the waist hole to the runner hole during injection The flow of the molten metal into the runner hole is smooth, and the injection force applied to the molten metal in the cavity from the injection device side during injection is sufficiently transmitted. As a result, it is possible to reliably and easily obtain a cast product that has good water circulation and is dense.

Furthermore, in the present invention, by simply inserting the upper end of the injection sleeve into the sleeve hole, the inner circumferential surface of the molten metal hole of the shear plate can always be aligned with the inner circumferential surface of the injection sleeve, as described above. Therefore, the upper end surface of the plunger tip can be inserted into the molten metal hole of the shear plate during injection. As a result, the biscuit, which is a solidified product of the molten metal remaining in the molten metal hole during injection, can be made thinner, and since the biscuit remains only above the inside of the molten metal hole, by moving the shear plate laterally, The biscuit portion can be reliably and easily cut at the narrow portion between the constricted hole on the shear plate side and the runner hole on the fixed mold side. As a result, the cast product can be easily taken out upward when the mold is opened, and the biscuit from the molten metal hole side can also be taken out easily.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention. FIG. 1 is a vertical cross-sectional view of the main parts of a vertical mold clamping and vertical injection type die casting machine, and FIG. c.
Line sectional views, Figures 3 a to f are longitudinal sectional views of essential parts shown to explain the operation, and Figure 4 is a longitudinal sectional view of essential parts showing another embodiment of the present invention corresponding to Fig. 1. side view,
FIG. 5 is a longitudinal cross-sectional view of the main parts of a conventional vertical mold clamping and vertical injection type die casting machine similar to the present invention. 23...Fixed mold, 23b...Top plate, 23c...
... Lower plate, 23d, 40c ... Shoulder, 24 ... Movable mold, 27 ... Cavity, 28 ... Plunger, 28a ... Plunger tip, 30 ... Injection sleeve, 31 ... Molten metal, 33 ... Guide Hole, 3
4, 35...Sliding groove, 36...Melted solidified material shear plate, 37...Sleeve hole, 38...Molten metal hole, 39
... Constriction hole (small hole), 40 ... Shear plate (right), 4
0a, 41a... Guide part, 40b, 41b... Sliding part, 41... Shear plate (left), 42, 43, 44,
45...Cylinder, 42a, 43b, 44a, 4
4b...Piston rod, 46...Runner hole.

Claims (1)

[Claims] 1. In an injection molding device that injects the molten material in a vertical injection sleeve into the cavity of a vertically clamped mold from directly below, the injection sleeve is injected into the molten material passage between the injection sleeve and the cavity. It has a sleeve hole on the lower side into which the upper end part is inserted from below, and has a hole on the upper side that has a smaller cross-sectional area than the inner hole of the injection sleeve, and is divided into parts at the center of this hole. An injection molding machine equipped with a solidified material shearing plate that can be moved horizontally.