JP3227464B2 - Method and apparatus for adding mark to mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for adding a mark to a mold for forming a mark on a cavity surface of the mold in accordance with the necessary information for the purpose of casting necessary information on a casting.

[0002]

2. Description of the Related Art Conventionally, in manufacturing a casting, in order to control a mass-produced casting, a concave character is formed in advance on a cavity surface of a mold, and the concave character is cast into the casting to obtain a name. 2. Description of the Related Art Indication or information necessary for casting management is added to a casting. And
The formation of a concave character on the cavity surface of a mold is performed by an operator incorporating a detachable inverted convex character into a model for molding a mold and transferring the inverted convex character to the mold.

[0003]

However, the work of incorporating the detachable reversible convex character into the model in such a manner is troublesome, and it is necessary to stop the flow of the mold forming line, thereby reducing the productivity. It will be a major factor to hurt. Especially in recent years,
With the enforcement of the Product Liability Act, the information necessary for casting production management has increased, and it has become necessary to add different information to each individual casting, so every single step of molding one mold The current method of attaching and detaching inverted convex characters to and from is extremely inefficient.

The present invention has been made in view of the above-mentioned circumstances, and a method of adding a mark to a mold capable of adding a mark for casting necessary information to a casting with good productivity to a cavity surface of the mold, and a method of adding the mark to the mold surface. It is an object of the present invention to provide an apparatus.

[0005]

According to a first aspect of the present invention, there is provided a method for adding a mark to a mold, which stamps necessary information on a casting in accordance with the necessary information. In the method of adding, in order to be able to read the required information by the position of the mark added to the cavity surface, a hole-shaped mark is formed at a predetermined position on the cavity surface, the predetermined position , Time reading of short hand and long hand of clock
It is characterized by being arranged.

According to this method, a simple hole-shaped mark is formed on the cavity surface of the mold. Therefore, when the method is applied to a mold made of sand or gypsum (hereinafter referred to as a sand mold or gypsum mold as appropriate), the mold (sand mold or gypsum mold) is used. The marks can be formed by plastic deformation processing or cutting with good productivity while preventing collapse of the mold. In particular, sand molds made of green sand are molded by compression molding a mixture of green sand and a binder,
Although it is hard and brittle immediately after molding, according to the method of the first invention for forming a simple hole-shaped mark, it is possible to effectively prevent the shape from being lost when forming the mark. A sand mold made of shell sand is molded by mixing a mixture of shell sand and a binder with a thermosetting binder in a mold, and is hard and brittle immediately after molding. According to the method of the first aspect of the present invention for forming a mark, it is possible to effectively prevent the shape from being lost when forming the mark. In this method, necessary information is read based on the position of a hole-shaped mark formed on the cavity surface, so that a large number of different information can be obtained by appropriately arranging a reading method according to the position of the mark. It can be easily applied to the case of displaying on a casting.

The method for adding a mark to a mold according to the second aspect of the present invention which solves the above-mentioned problems is provided in accordance with the necessary information on a cavity surface of a mold made of self-hardening sand or gypsum in order to cast out necessary information on a casting. A method of adding a mark, wherein the cavity
Read the required information according to the position of the mark added to the surface
As can be, after forming the mark of Anajo at a predetermined position of the cavity surface of the molding in a semi-cured state mold by mold molding machine, with complete curing of the template, said predetermined orientation
Location and characterized by this <br/> and tailored to time reading the short hand and minute hand of the watch.

This method is applied when a mark is added to a sand mold or a gypsum mold made of self-hardening sand. Since the sand mold or the gypsum mold is brittle, if the sand mold or the gypsum mold molded by the mold molding machine is completely hardened and the cavity surface is to be marked by plastic deformation or cutting, the sand mold or the gypsum mold is used. May collapse. In the method of the second invention, a mark is formed on the cavity surface of the semi-cured mold (self-hardening sand mold or gypsum mold) while being softened by the mold making machine, so that the mold (self-hardening sand mold or gypsum mold) is formed. A mark of an arbitrary shape can be formed by plastic deformation processing or cutting while preventing collapse and with good productivity.

Here, the semi-hardened mold (self-hardening sand mold or gypsum mold) is a mold (self-hardening sand mold or gypsum mold) immediately after being molded by a mold molding machine, and is formed by plastic deformation processing or cutting. A mold (self-hardening sand mold or gypsum mold) in a state soft enough to form a mark of a desired shape without breaking the mold. For example, in a sand mold or a gypsum mold made of self-hardening sand, a state before a binder such as a resin is completely cured is referred to as a semi-cured state.

An apparatus for adding a mark to a mold according to the present invention for solving the above-mentioned problem is an apparatus for adding a mark to a cavity surface of a mold in accordance with the necessary information for the purpose of casting necessary information on a casting. A jig for adding the mark to the cavity surface of the mold, elevating means for elevating the jig, moving means for moving the jig in a horizontal direction, and controlling the elevating means and the moving means Control means; and arithmetic means for giving an instruction to the control means , wherein a mark added to the cavity surface is provided .
The necessary information can be read by the position of
In accordance with the time reading of the hour hand and hour hand
A hole-shaped mark is added to the position .

This device is a device suitable for carrying out the first invention. That is, in order to operate the moving means, an instruction is given from the calculating means to the control means, and the jig is moved in the horizontal direction through the moving means to a predetermined position. An instruction is given from the arithmetic means to the control means, and the jig is lowered via the elevating means. With such an operation, if a needle-shaped jig having a sharp tip is used as the jig, a hole-shaped mark can be easily plastically deformed on the cavity surface of the mold. Further, if a drill is used as the jig, a hole-shaped mark can be easily cut on the cavity surface of the mold by lowering the jig while rotating it when the jig is lowered by the elevating means.

It is needless to say that the above-mentioned device can be applied when the above-mentioned second invention is carried out. That is, the above-mentioned apparatus is arranged near a mold making machine, and the jig is placed at a predetermined position on a cavity surface of a semi-cured mold (self-hardening sand mold or gypsum mold) immediately after being made by the mold making machine. A mark of an arbitrary shape can be formed by the plastic deformation processing or cutting processing used.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to embodiments. (Embodiment) An apparatus for applying a mark to a mold, schematically shown in FIG. 1, comprises a portal frame 3 as a base and a needle as a jig for adding a mark to the cavity surface 2 a of the mold 2. 14, a lifting / lowering means (third servomotor type cylinder) 13 for raising / lowering the needle 14, a left / right moving means 4 and a front / rear moving means 8 for moving the needle 14 in a horizontal direction (left / right direction and front / back direction), A control panel 18 for controlling the left and right moving means 4 and the front and rear moving means 8, and a calculating means 16 for giving instructions to the control panel 18. Note that the front-back direction is a forward / backward direction of the mold 2 sent out from a molding machine (not shown), and the left-right direction is a direction perpendicular to the front-rear direction. The portal frame 3 as a base includes a rectangular upper frame portion 3a and four leg frame portions 3b, and extends on the upper surface of the upper frame portion 3a in the longitudinal direction (the same direction as the left and right direction). A pair of rails 5 are laid. In this portal frame 3, the mold 2 with the casting frame 1 sent out from a mold molding machine (not shown) can pass below the portal frame 3 in a direction perpendicular to the longitudinal direction (the same direction as the front-back direction). Thus, it is located near the mold making machine.

On the pair of rails 5 of the portal frame 3,
The traveling platform 6 is installed so as to be able to reciprocate in the longitudinal direction (the left-right direction). This traveling platform 6 has a portal frame 3
The tip of the piston rod 7b of the first servomotor type cylinder 7 mounted on the upper frame 3a is connected, and the traveling table 6
Are reciprocated in the longitudinal direction of the portal frame 3 (the left-right direction). Note that the traveling platform 6 and the first servomotor type cylinder 7 constitute the left / right moving means 4.

A linear guide mechanism 9 extending in the front-rear direction is mounted on the traveling platform 6, and a traveling frame 10 is mounted on the linear guide mechanism 9 so as to reciprocate in the front-rear direction. . The tip of a piston rod 11b of a second servomotor type cylinder 11 mounted on the traveling platform 6 is connected to the traveling frame 10, and the traveling frame 1 is expanded and contracted by the second servomotor type cylinder 11.
0 is reciprocated in the front-rear direction. The linear guide mechanism 9, the traveling frame 10, and the second servomotor type cylinder 11 constitute the above-mentioned front-rear moving means 8.

Further, a third servomotor-type cylinder 13 as the above-mentioned elevating means is mounted on the traveling frame 10, and a needle 14 having a sharp-angled tip is provided at the tip of a piston rod 13b of the third servomotor-type cylinder 13. It is attached detachably. The needle 14 has a pointed tip. Therefore, the needle 14 as a jig can be moved up and down by the elevating means (third servomotor type cylinder) 13, and the needle 14 and the elevating means 13 can be reciprocated in the front-rear direction by the front-rear moving means 8. The needle 14, the lifting / lowering means 13 and the forward / backward moving means 8 can be reciprocated in the left / right direction by the left / right moving means 4.

The servomotor 7a of the first servomotor type cylinder 7, the servomotor 11a of the second servomotor type cylinder 11, and the third servomotor type cylinder 13
The servo motor 13a has a control panel 1 as a control means.
The control panel 18 is electrically connected to the calculating means 16. In the apparatus having the above-described configuration, a mold (a sand mold made of fresh sand in this embodiment) 2 with a casting flask 1 continuously fed from a mold molding machine (not shown) is positioned immediately below the portal frame 3. Then, a predetermined instruction is given from the calculating means 16 to the control panel 18,
The left and right moving means 4, the front and rear moving means 8, and the elevating means 13 are operated. That is, the needle 14, the elevating / lowering means 13 and the forward / backward moving means 8 are moved in the left / right direction by the expansion / contraction operation of the first servomotor type cylinder 7 constituting the left / right moving means 4, and the first servo constituting the forward / backward moving means 8 The needle 14 and the elevating means 13 are moved in the front-rear direction by the expansion and contraction operation of the motor type cylinder 11, and the cavity surface 2a of the mold 2 is moved.
The needle 14 is positioned just above the adding position. And
By the extension operation of the third servo motor type cylinder 13 as the elevating means, the needle 14 is lowered and stabbed into a predetermined position of the cavity surface 2a of the mold 2 to plastically deform the mold 2 immediately after molding, and according to necessary information. A hole-shaped deformation trace is formed on the cavity surface 2a of the mold 2 as a mark. The above operation is repeated as necessary, and the cavity surface 2a of the mold 2 is
Can be formed with a plurality of marks. In this way,
Using a needle 14 as a jig, a simple hole-shaped mark can be formed at a predetermined position on the cavity surface 2a of the mold 2 with high productivity by plastic deformation processing.

The casting is performed at a predetermined position of the casting by casting using a mold 2 having a hole-shaped mark added to a predetermined position of the cavity surface 2a. here,
An example will be described in which, when a hole-shaped mark is formed at a predetermined position on the cavity surface 2a of the mold 2 and the mark is cast on a casting, necessary information is read from the position of the mark printed on the casting.

For example, as shown in FIG. 2, a first mark 21a is provided at a predetermined position on a large-diameter circumference (virtual line) 20a, and a first mark 21a is provided at a predetermined position on a small-diameter circumference (virtual line) 20b. The information can be read by attaching the second mark 21b to the first mark 21a at the time of the hour hand 22 of the clock and the second mark 21b at the time of the short hand 23 of the clock. In the case of FIG. 2, it can be read at 3:04, and from this, for example, information 34 can be read.

Therefore, in the present embodiment, since a simple hole-shaped mark is formed using the needle 14 having a pointed tip, even if the mold 2 is a sand mold made of green sand, A mark can be added to the mold 2 with high productivity while preventing the problem effectively.

Further, by using the apparatus having the above-described configuration, a plurality of marks can be easily and efficiently added to any position on the cavity surface 2a of the mold 2. And
Since necessary information can be displayed according to the position where the mark is added, it is possible to display information that is extremely simple and highly productive and different for each casting. In the above-described embodiment, an example in which a sand mold made of raw sand is used as the mold 2 has been described. However, a sand mold made of shell sand, a self-hardening sand mold, or a plaster mold can be used for the mold 2 as a matter of course. The sand mold made of shell sand is hard and brittle immediately after molding, like the sand mold made of raw sand, but in the present embodiment, a simple hole-shaped mark is formed using the needle 14 having a sharp tip. Therefore, a mark can be added to the mold 2 with high productivity while effectively preventing the mold 2 from collapsing. In addition, since the self-hardening sand mold and the gypsum mold are in a semi-cured state in which the binder such as resin is not completely cured immediately after molding, and are soft, a mark is formed on the mold 2 immediately after being molded by the mold molding machine. By doing so, a mark can be added to the mold 2 with high productivity while effectively preventing the mold 2 from collapsing.

In the above embodiment, it is also possible to use a jig having an arbitrary convex tip portion as the jig. In particular, when a self-hardening sand mold or gypsum mold is used for the mold 2, if a mark is formed in a semi-hardened soft state immediately after molding, a mark of an arbitrary shape is formed at a predetermined position on the self-hardening sand mold or gypsum mold. In addition, it is possible to form easily and with high productivity while preventing shape collapse. Also, it is possible to form a mark by cutting using a cutting tool as a jig.

In the above embodiment, since the needle 14 having the sharp tip is used as a jig, when a self-hardening sand mold or a plaster mold is used as the mold 2, these molds are completely cured. Even in the later state, it is possible to form a simple hole-shaped mark on the cavity surface 2 of the mold 2 while favorably preventing the mold 2 from collapsing. As shown in FIG.
A table 2 as shown in FIG. 3 is transferred to the cavity surface 2a of the mold 2 by attaching a table-shaped mold such as a baseball scoreboard to the model, and a mark is put on the score column of the table 24. And a method of reading a number can be cited as a reference example.

[0024]

As described above in detail, according to the present invention, a mold that is fragile and requires one mold for one cast article is provided while preventing mold collapse and improving productivity. It is possible to add a mark well. That is, in the method of adding a mark to the mold of the first invention, a simple hole-like mark is formed at a predetermined position on the cavity surface so that the necessary information can be read from the position of the mark added to the cavity surface. Therefore, even with a mold made of sand or gypsum, a mark can be formed with high productivity while preventing collapse of the mold. Since necessary information is read based on the positions of the hole-shaped marks formed on the cavity surface, by appropriately arranging a reading method according to the positions of the marks, it is extremely simple and productive. Different necessary information can be displayed on the casting.

Further, the method of adding a mark to the mold of the second invention is as follows.
Since a mark is formed on the cavity surface of a soft mold (self-hardening sand or gypsum mold) that has been molded by a mold molding machine and is in a semi-cured state, it is possible to prevent the mold from collapsing and to mark a mark of any shape with high productivity. Can be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an entire configuration of a device for applying a mark to a mold according to the present embodiment.

FIG. 2 is a diagram illustrating an example in which necessary information is read by a mark of a hole shape formed at a predetermined position on a cavity surface of a mold.

FIG. 3 is a diagram illustrating an example in which necessary information is read by a mark of a hole shape formed at a predetermined position on a cavity surface of a mold.

[Explanation of symbols]

2 is a mold, 2a is a cavity surface, 4 is a left and right moving means, 7
Is a back and forth moving means, 8 is a lifting / lowering means, 14 is a needle as a jig, 18 is a control panel as a control means, and 16 is a calculating means.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shigeaki Yamamoto 32-556 Ushikawa-cho Nori-koji, Toyohashi-shi, Aichi Prefecture (72) Inventor Shinji Shirai 50-1, Shukuko-ji Temple, Kosakai-cho, Hoai-gun, Aichi Prefecture (56) References JP-A-2-142638 (JP, A) JP-A-6-39489 (JP, A) JP-A-7-232235 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22C 9 / 02 103 B22C 9/02 101 B22C 11/00-25/00 B22D 46/00 B41K 3/36

Claims (3)

(57) [Claims] 1. A method for adding a mark to a cavity surface of a mold according to the necessary information for the purpose of casting necessary information on a casting, wherein the necessary information is determined by a position of the mark added to the cavity surface. A hole-shaped mark is formed at a predetermined position on the cavity surface so that the time can be read.
A method for adding a mark to a mold, characterized in that the time is read in accordance with the time of a short hand and a long hand . 2. A method for adding a mark to a cavity surface of a mold made of self-hardening sand or gypsum according to the necessary information for the purpose of casting necessary information on a casting, wherein the mark is added to the cavity surface. Required depending on the position of the mark
At a predetermined position on the cavity surface of the mold in a semi-cured state, molded by a mold molding machine so that information can be read
After forming the hole-shaped mark, when fully cured the template bets
In addition, the predetermined position is read by the time of the short hand and the long hand of the watch.
A method for adding a mark to a mold, which is characterized by the following: 3. An apparatus for adding a mark to a cavity surface of a mold in accordance with the necessary information for the purpose of casting necessary information on a casting, comprising: a tool for adding the mark to a cavity surface of the mold. Tool, lifting means for lifting and lowering the jig, moving means for moving the jig in the horizontal direction, control means for controlling the lifting and lowering means and the moving means, and arithmetic means for giving instructions to the control means wherein the required by the position of the mark added to the cavity surface
The watch's short hand and long hand so that the information can be read
Adds a hole-shaped mark at a predetermined position according to the time reading of the hands
An apparatus for applying a mark to a mold.