JPH0614918Y2 - Casting separator as well as casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a casting separator and a casting mold device.

[Conventional technology]

Conventionally, between the upper mold and the lower mold of the mold made of casting sand, a casting filter composed of a flat mesh sheet is sandwiched around the peripheral portion of a vertically extending runner, and the molten metal is The casting product of the specified shape is poured and filled from the sprue via the runner through the runner, and after cooling and solidification, the mold is broken and the casting product and the pouring part runner solidified product and riser part hot water continuous with this are cast. Take out the integral casting consisting of the road solidified material, and then remove these unnecessary solidified materials by flame cutting, saw cutting, etc. in the vicinity of the cast product, and further remove the residual solidified material after cutting with a grinder. A mold apparatus is known in which a cast product having a desired predetermined shape is first obtained by grinding the cast product to a surface approximately the same as the surface of the cast product and then polishing and finishing.

In order to improve the above-described mold apparatus, a flat casting separator is allowed to traverse the horizontally extending runner between the casting product casting space of the mold and the subsequent runner, and the peripheral portion thereof is It is embedded in the surrounding mold wall that regulates the runner and installed interposingly, and in this state, after making a casting as in the above-mentioned conventional, by simply hammering the runner coagulation part, the intermediary mesh sheet surface A mold apparatus is also known which is designed to easily remove most of the solidified portion along the line.

The former former mold device is a casting device of a type in which the flat casting filter is sandwiched between the upper mold and the lower mold, and when the upper mold and the lower mold are impacted, a positional shift occurs, or the molten metal is melted. The flow of water causes inconveniences such as the filter falling out in the runner.

Also, the latter conventional casting apparatus described above shows an improvement of the former casting apparatus in that most of the runner solidification portion can be easily divided along the planar casting separator. In order to manufacture the mold, it is necessary to embed the mold integrally, which is troublesome in the mold manufacturing work, and there is the inconvenience that high-efficiency production cannot be easily obtained.

In order to eliminate these conventional inconveniences, the applicant has proposed in the above-mentioned Japanese Utility Model Application No. 63-71483 that flat separators are formed on the mold wall portions on both sides of the runner of the mold at right angles to the runner. By arranging the fitting and locking cut grooves, the flat separators are inserted into the cut grooves on both sides of the flat separator, the center surface portion of the cut separator is crossed over the runner, and both side portions are inserted into the cut grooves. , It can be installed immovably in the mold without displacement due to impact, and the locking projections provided on both side surfaces of the mold prevent displacement and dropout due to the flow force of the molten metal, and at the same time,
We proposed a casting mold device that prevented contact with the locking projections of molten metal.

[Problems to be solved by the device]

However, the previously proposed mold device has improved the disadvantages of the above-mentioned conventional mold device, but in the planar separator used for the mold, as described above, most of the solidified portion by the hammer is removed. Although the work is facilitated, since a considerable amount of the residual portion that protrudes from the casting product of the predetermined shape remains after the removal, it is inevitable to grind it and then to remove it to the approximately same surface as the casting product surface. In that case, the grinding dust is scattered, which makes the work difficult and is not preferable in terms of hygiene.

Therefore, the proposed planar separator, when installed in the mold as much as possible, is substantially coplanar with the boundary opening surface between the casting product casting space and the outer communicating runner. If it can be installed, the above grinding and removing work can be omitted, but as shown in FIG. 10, the shape of the space A of the mold M is surrounded by the regulation wall surface m of the mold M such as a three-dimensional shape or a rectangular shape. In this case, therefore, when it is formed of the surrounding wall surface m at right angles to the runner R on the outside, it cannot be installed on the same plane as the boundary opening surface a between the space A and the runner R. Therefore, the runner R is crossed at the central surface portion S ₁ of the mesh sheet separator S as close as possible to the opening surface a,
The side surface portions S ₂ and S ₂ on both sides are fitted and fixed to the mold wall portions y and y that regulate the runner R by being inserted into the cut grooves L and L arranged orthogonal to the runner R. It is unavoidable that, after the pouring work, a runner space g is formed between the opening surface a and the central surface portion S ₁ of the planar separator to generate a cooling and solidifying surface of the molten metal.

In the drawing, B indicates a runner connected to the upper sprue and C indicates a runner connected to the upper feeder.

Further, as shown in the eleventh illustration, when the shape of the surrounding space A by the mold M is a curved peripheral surface shape surrounded by the surrounding wall surface m such as a cylindrical shape or a spherical shape, the central surface portion S ₁ of the planar separator S is Mold wall parts y, y which are located on substantially the same plane as the arcuate opening surface a and whose side surface parts S ₁ , S ₂ on both sides thereof restrict the runner R.
It can be inserted into the cut groove provided in and fixedly secured, and therefore, the runner space for producing the cooled solidified product of the molten metal as described above is eliminated between the separator S and the opening surface a of the central surface portion S _1. However, in the corner portion of the mold surrounding the opening surface a, cut grooves L and L into which both side surface portions S ₂ and S ₂ of the separator S are inserted and arcuate wall surfaces m and m that regulate the space A are formed. Is sandwiched between and to form thin tapered mold wall portions t, t. Therefore, when casting using this mold device,
When the molten metal vigorously flows into the space A from the outside through the runner R, the molten metal flow hits the thin tapered mold wall portions t, t, and tends to easily collapse them. The shape of the mold space A is broken, which causes a problem that a casting product having a predetermined shape cannot be obtained.

[Means for Solving the Problems]

The present invention solves the above problems and can completely or almost completely omit the work of grinding the solidified product from the surface of the cast product after casting. Only a short polishing work is required, and a cast product of a predetermined shape is obtained. To provide a casting separator that can be installed immovably by fitting and locking according to the inclination degree to the inclined kerfs arranged on the mold wall portions on both sides of the runner provided in the mold so that The casting separator of the present invention is formed by bending a heat-resistant hot water-permeable sheet-like separator having flexibility. The side portions on both sides are inclined with respect to the central surface portion, and a reinforcing plate such as a metal plate is attached to at least one surface of each of the side surface portions on both sides.

Further, in the casting mold device of the present invention, a heat-resistant hot water-permeable sheet-like separator is provided in a mold made of casting sand across the runner between a casting space for casting a cast product of a predetermined shape and a runner outside the cast product. In a casting mold apparatus installed, the heat-resistant hot-water-permeable sheet-shaped separator having flexibility of the above-described casting separator of the present invention is formed so that its central surface portion is substantially flush with the boundary opening surface between the casting space and the runner. Positioned to traverse the runner, and to bend the both side surface portions rearward from the central surface portion so as to be gradually separated from the mold wall surface that regulates the space, and the inclined side surface portions attached to the reinforcing plate, It is installed in a state in which it is fitted and locked in the inclined cut grooves provided in the mold wall portions on both sides for controlling the runner.

[Action]

In the casting separator of the present invention, since the sheet-shaped separator has flexibility as described above, the sheet separator is directly adjusted in accordance with the inclination angle of the inclined kerfs disposed on the mold wall portions on both sides of the runner in the mold. The side surface portions on both sides can be bent and inserted into the inclined kerf for installation.

In this case, since the reinforcing plate is fixedly installed on the inclined side surface portion, the inclined state of the inclined side surface portion is stably maintained, the insertion work into the inclined kerf formed in the mold is facilitated, and It is possible to keep the combined locking state stable and robust.

In the use of the casting mold device of the present invention, when pouring according to a conventional method, the casting separator is
The fitting and locking state can be maintained stably and robustly. It will never fall out. After filling the space with the molten metal and solidifying it, the mold is destroyed and the casting is taken out, and if the runner solidification portion on the outer surface of the casting is hit with a hammer, it solidifies along the central surface portion of the separator in the same plane as the boundary opening surface. Since the part is broken and removed, there is little or no solidification residue left to be ground in the part. Therefore, it is possible to facilitate and speed up the production of the mold product which can omit the grinding work, and to eliminate the inconvenience during the grinding work. In addition, the mold device of the present invention uses the kerfs that the space between the mold wall that regulates the space and the sloping side surfaces on both sides of the center surface of the separator fit together. Since the tapered mold wall portion having a relatively thick wall is increased, the tapered mold wall portion does not collapse due to the flow force of the molten metal to be filled into the space during casting.

In this case, the bent shape of the sheet-shaped separator is a flat inclined side surface portion in which the side surface portions on both sides of the central surface portion are bent backward at a desired angle, or the entire sheet-shaped separator is curved in an arc shape. It is possible to use an arcuate central surface portion and arcuate inclined surface portions on both sides thereof, or an arcuate concave surface shape of which the central surface portion follows the circular outer peripheral shape of the casting space. In this case, the mold comprising the split mold of the upper mold and the lower mold may be installed even if the sheet separator of the present invention is fitted and locked as described above on at least one of the upper mold and the lower mold. Well, either one of the upper mold and the lower mold is provided with the sheet separator of the present invention as described above, and a reinforcing member is provided at the outer edge of the central surface portion that traverses the inside of the runner. When brought into contact with the lower mold, the outer edge is not bent, and a stable and robust contact edge is obtained. In any of the above cases, a similar casting mold device of the present invention is constructed, and the same operation as described above is brought about. [Embodiment] Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a mold apparatus according to an embodiment of the present invention, in which 1 represents a mold made of casting sand such as franc silica sand, and the mold 1 comprises an upper mold 1a and a lower mold 1b. A heat-resistant, hot-water-permeable sheet-shaped separator 2 having flexibility of the casting separator of the present invention is installed at a predetermined position of the mold 1 as described below to configure the mold device of the present invention shown in FIGS. did.
The illustrated mold 1 has a rectangular parallelepiped casting product casting space 3 formed in the center thereof over the upper mold 1a and the lower mold 1b, and the space 3 has a horizontal surface extending horizontally on one side surface thereof. A feeder system which is connected to a sprue system passage 4 consisting of a passage 4a and a spout 4c on the top surface of a runner 4b extending vertically, and a runner 5a extending horizontally on the other side and a riser 5b extending vertically on the other side. A path 5 is provided.

As the heat-resistant hot water-permeable separator 2 having flexibility, a heat-resistant porous sheet such as a woven cloth, a non-woven cloth, a net-like sheet made of heat-resistant glass fibers or other fibers, or a net-like or lattice-like made of heat-resistant metal wires is used. However, the illustrated example is composed of a heat-resistant reticulated sheet 2 having flexibility of heat-resistant high silicate glass fiber that can withstand a molten metal of a high melting point, and communicates with both side surfaces of the space 3 of the mold 1. According to the present invention, the horizontal runners 4a, 5a are installed across each of the horizontal runners.
The sheet-shaped separator 2 is configured so that the side surface portions 2b, 2b on both sides thereof are inclined at a desired angle with respect to the central surface portion 2a, leaving the central surface portion 2a having a surface area slightly wider than the cross section of each runner. The casting separator shown in FIG. 3 is formed by bending the inclined side surface portions 2b, 2b so as to be inclined at 45 °. Thus, according to the present invention, by constructing such a bent sheet-shaped separator 2, it can be installed in the mold 1 as follows, as shown in FIGS. 1 and 2. it can. That is, the central surface area 2a of the separator 2 is located substantially on the same plane as the boundary opening surface 3a that intersects with the casting product casting space 3 and the horizontally extending runners 4a or 5a on both sides thereof. 45 ° with respect to the wall surface 1a that restricts the space 3 by tilting the inclined side surface portions 2b, 2b on both sides thereof.
Mold wall portions 1d, 1 which regulate the runner 4a or 5a in a relationship inclined rearward from the central surface portion 2a so as to be gradually separated at an angle of
Installed in a state in which the corners at right angles to the regulation wall surfaces 1c, 1c are fitted into the kerfs 10, 10 inclined at an angle of 45 °, respectively, in d. Thus, the inclined side surface portions 2b of the respective separators 2 are provided at the corners of the right angle of the mold formed between the space 3 and the respective runners 4a, 5a with respect to the regulating wall surface 1c by 45 degrees.
Since the taper mold wall portion 6 having a large angle of 45 ° can be formed by retreating largely backward at an angle of 45 °,
When the molten metal flows into and fills the space 3 through each runner 4a or 5a, the tapered mold wall portions 6 and 6 on both sides of each runner 4a or 5a are not collapsed by the inflowing melt.

In the above-mentioned embodiment, the casting separator 2 of the present invention is constituted by one sheet over the upper die 1a and the lower die 1b, but as shown in FIGS. , Each of which is installed separately, and in this case, the outer edge 2c of the central surface portion 2a projecting into the runner of each of the bent separators 2 is regulated to the same height as the surfaces of the upper die and the lower die that abut against each other, The molten metal may be traversed by abutting each other at the outer edges 2c, 2c of the central surface portions 2a of the two separators 2 installed vertically.

Incidentally, the casting separator 2 of the present invention has the locking projections 7, 7 on at least one surface thereof on each of the side surface portions 2b, 2b on both sides thereof, as shown in the previously filed Japanese Utility Model Application No. 63-71483. 7 is provided so as to prevent the separator 2 from shifting from its predetermined position or flowing out in the flow of molten metal, and the projection 7 is made of the same material as that of the separator 2 as illustrated in FIG. High silicate glass fiber mesh cloth,
It is composed of a cut piece of a narrow rectangular reinforcing plate 2 such as a non-woven fabric or a woven fabric, and a plurality of staples, other fasteners, heat-resistant adhesives and the like are used to interpose the side surface portions 2b on both sides of the separator 2. , 2b are bonded and reinforced so that the side surface portions 2b, 2b on both sides of the casting separator 2 of the present invention can be stably and firmly fitted and locked in the respective cut grooves 10, 10. The casting separator 2 of the present invention, which is strong and stable against the above-mentioned molten metal flow force, can be surely prevented from being displaced or dropped.

In the embodiment shown in FIGS. 4 and 5, the outer edges 2c and 2c of the upper and lower sheet-shaped separators 2 and 2 of the present invention, which project into the runner and abut each other, should be reinforced and abutted as necessary. Reinforcing members 8, 8 made of high silicate glass fiber or the like extending horizontally may be provided to reinforce the outer edges 2c, 2c and to obtain stable mutual contact.

FIGS. 6 to 7 show still another embodiment. In this embodiment, the mold 1 has a cylindrical mold product casting space 3 extending over the upper mold 1a and the lower mold 1b. Then, the casting separator 2 of the present invention is formed as a mesh sheet-shaped separator 2 which is bent in an arc shape as a whole, and the arc-shaped central surface area 2a thereof is formed.
Are positioned substantially on the same plane as the boundary opening surface 3a, and the side surface portions 2b, 2b on both sides of the boundary opening surface 3a are gradually inclined in a direction opposite to the circular mold peripheral wall surface 1c that regulates the outer peripheral surface of the space 3. Mold wall portions 1d, 1 for regulating the runners 4a, 5a respectively as side surface portions 2b, 2b
It is installed in a state of being fitted and locked in the arcuate inclined kerfs 10, 10 arranged in d.

Thus, a circular wall surface that regulates the peripheral side surface of the space 3
1c and the arcuate side surface portions 2b, 2b on both sides of each separator 2 are formed with tapered wall walls 6 and 6 having a large angle, so that the tapered shape due to the molten metal flow at the time of pouring. Collapse of the mold walls 6, 6 is prevented. In the arc-shaped separator 2 of the present invention, as shown in FIG. 8, U-shaped metal plates 9 and 9 as reinforcing plates are attached to both side portions 2b and 2b of one side thereof by an adhesive or a stapler. At this time, the sheet-shaped separator 2 having the flexible bendability can bend, but brings rigidity that allows the predetermined bending inclination state to be stably maintained, and the inside of the kerf of the same bending shape provided in the mold. Easy to insert.

In addition, in this case, one end of the metal reinforcing plate 9 is bent inward to serve as the locking projection 7.

FIG. 9 shows still another embodiment. The sheet-shaped separator 2 of the casting separator of the present invention has a central surface area 2a.
Is formed on the circular arc-shaped concave surface 2a along the circular arc-shaped boundary opening surface 3a of the circular peripheral surface of the casting space 3, whereby the central surface area 2a of the circular arc-shaped concave surface of the interposed separator 2 after casting is formed.
It was possible to break with a hammer along with, and to further reduce the labor of the polishing work. In this case, the casting separator 2 of the present invention has a metal reinforcing plate 9 and its locking projections 7 on the side surface portions on both sides thereof, similar to the one shown in FIG.
Is equipped with.

In any of the above-mentioned embodiments, the casting apparatus of the present invention is designed so that the molten metal is poured into the space 3 through the pouring port 4c by a conventional method, and after cooling and solidification, the mold 1 is broken to obtain the predetermined shape. A cast product is obtained which comprises the casting product and the solidification part of the sprue system passage 4 and the riser system passage 5 which are integrally associated with the casting product. If the solidification portion is hit with a hammer, the casting separator 2 of the present invention can be obtained. Since these solidified portions are separated from the root along the outer surface of the central surface portion 2a of the mold product, there is no or almost no solidified portion remaining on the outer surface of the mold product. Can be simplified.

Further, when the sheet-shaped separator of the present invention is installed in the mold, the casting separator product of the present invention which has been manufactured in advance is used, and the runner around the outer periphery of the casting space of the casting of the mold is used on the spot. It is optional to bend according to the shape of the boundary opening surface and the inclined kerf, manufacture the separator for casting of the present invention according to each mold, and insert and install it according to each mold.

[Effect of device]

As described above, according to the present invention, since the heat-resistant hot water-permeable sheet-shaped separator having a bent shape is recedingly bent at the side surface portions on both sides of the center surface portion, the shape of the casting space of the casting product of the mold is determined. Regardless, the central surface portion of the separator can be positioned substantially or substantially on the same plane as the boundary opening surface between the space and the runners connected to the space, and at the same time, both side surface portions thereof serve as wall surfaces that regulate the space. On the other hand, since it can be inserted and installed in the inclined kerf formed in the mold wall portions on both sides of the runner as the gradually inclined side surface portion, the tapered mold wall between the wall surface that regulates the space and the inclined side surface portion. Since the part can be formed into a taper shape with a large angle and a large angle, it is possible to prevent the tapered mold wall part from collapsing due to the molten metal at the time of casting and to reliably manufacture a cast product of a predetermined shape, thereby reducing manufacturing loss. Lost, Since reinforcing plates are attached to the slanted side surface portions on both sides of the slanted side surface portion, the slanted side surface portion is stable and can be easily inserted into the kerf. In addition, it has the effect of being able to firmly prevent the falling off.

Furthermore, the flexibility of the casting separator of the present invention is utilized to match the shape of the boundary opening surface with the runner at the outer periphery of the casting space of the mold to which it is attached and the inclination and shape of the kerfs on both sides in the field. It is convenient because it can be bent and installed freely.

Furthermore, when a caster is formed by a casting device having such a separator of the present invention installed in a mold as described above, and when the runner coagulated product is hit with a hammer, the center of the intervening separator of the present invention starts from the root. Since it breaks along the surface, grinding work can be omitted altogether or almost, and a good casting product of a predetermined shape can be obtained by simply performing polishing work on the cross section, and conventional grinding work can be omitted. It has the effect that a cast product can be obtained hygienically and easily without adverse effects due to dust generated during grinding.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a casting apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a lower mold thereof, and FIG. 3 is a perspective view of an example of a separator according to the present invention used therein. FIG. 4 is a sectional view of a main part of a casting apparatus of another embodiment, and FIG. 5 is a line V-V in FIG.
FIG. 6 is a plan view of a lower mold of still another embodiment, FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6, and FIG. FIG. 9 is a plan view of a lower die of another embodiment of the present invention.
FIG. 10 and FIG. 11 show plan views of the mold apparatus according to the prior art, respectively. 1 …… Mold, 1a …… Upper mold 1b …… Lower mold, 1d …… Mold wall part 2 …… Sheet separator, 2a …… Center surface part 2b …… Inclined side surface part, 3 …… Casting product casting space 3a ...... Boundary opening face, 3b ...... Space control mold wall face 4 ・ ・ ・ Gate system passage, 5 ・ ・ ・ Feeder system route 6 ・ ・ ・ Tapered mold wall part, 9 ・ ・ ・ Reinforcement plate 10 ・ ・ ・ Cutting groove

Claims (7)

[Scope of utility model registration request] Claims: 1. A heat-resistant hot water-permeable sheet-shaped separator having flexibility is bent to incline the side surface portions on both sides of the central surface portion, and the side surface portions on both sides are respectively inclined.
A casting separator formed by binding a reinforcing plate such as a metal plate on at least one surface thereof. 2. A heat-resistant hot-water permeable sheet-like separator is installed in a mold made of casting sand, across a runway between a space for casting a cast product of a predetermined shape and a runner outside the cast runway. In a casting mold apparatus, the heat-resistant hot water-flowing sheet-like separator having flexibility according to claim 1 is crossed across the runner with its central surface portion substantially flush with the boundary opening surface between the casting space and the runner. In addition, both side edge portions are bent backward from the central surface portion so as to be gradually separated from the mold wall surface that regulates the space, and inclined side surface portions provided with the reinforcing plate are provided on both sides that regulate the runner. A casting mold device installed in a slanted kerf provided in the casting mold wall in a fitted and locked state. 3. The heat-resistant, hot-water-permeable sheet-shaped separator having flexibility has a flat central surface. The side surface portions on both sides thereof are bent rearward from the central surface portion at a desired angle and formed into inclined side surface portions provided with the reinforcing plate, and the planar central surface portion is substantially flush with the boundary opening surface. Positioned to traverse the runner, and the inclined side surface portions on both sides of which the flat reinforcing plates are attached are provided on both sides of the mold wall portion for regulating the runner. The mold apparatus according to claim 2, wherein the mold apparatus is installed in a state in which the mold is fitted and locked. 4. The hot water-permeable sheet-like separator having flexibility is formed by curving the entire arc in an arc shape, and the arc-shaped center surface portion is positioned substantially flush with the boundary opening surface. And the slanted side surface portions provided with the arc-shaped reinforcing plates on both sides thereof are fitted in the arc-shaped slanted grooves on both sides of the mold wall portion that regulates the runner. The mold device according to claim 2, wherein the mold device is installed in a stopped state. 5. The heat-resistant hot-water-permeable sheet-shaped separator having flexibility has a central surface portion formed into an arcuate concave surface along a circular peripheral surface of the casting product casting space, and the side surface portions on both sides thereof are It is formed on the inclined side surface portion that is bent rearward from the central surface portion and is provided with the reinforcing plate, and the central surface portion of the arcuate concave surface is positioned substantially on the same plane as the arcuate boundary opening surface of the space, A horizontal inclined side surface portion provided with the reinforcing plates on both sides thereof is installed in a state of being fitted in horizontal inclined kerfs provided on both sides of the mold wall portion for controlling both sides of the runner. The mold device according to 2. 6. The mold comprises a split mold of an upper mold and a lower mold,
The mold apparatus according to any one of claims 2 to 5, wherein the heat-resistant hot water-permeable sheet-shaped separator having flexibility is provided on at least one of an upper mold and a lower mold. 7. The mold comprises a split mold of an upper mold and a lower mold,
In one of the split molds, the heat-resistant hot water-permeable sheet-shaped separator having the flexibility is positioned so that its central surface portion is substantially flush with the boundary opening surface between the casting space and the runner, The inclined side surface portion provided with the reinforcing plate is fitted and locked in the inclined cut grooves on both sides provided in the mold wall portions on both sides for controlling the runner, and the outer edge of the central surface portion that crosses the inside of the runner. The casting mold apparatus according to claim 2, wherein the reinforcing member is installed in a state of being brought into contact with an opposing upper mold or lower mold.