JP2012135772A - Manufacturing history of cast iron pipe and method for managing shipping destination - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep risk to a minimum by immediately specifying a shipping destination of a cast iron pipe upon occurrence of a trouble by reliably grasping the manufacturing history and management of the shipping destination for each cast iron pipe, and to assure further reliability and safety of the cast iron pipe by unifying the management for each cast iron pipe.SOLUTION: On a surface of a core for casting a socket corresponding to an end surface on the outside of a flange formed in a socket of the cast iron pipe to be casted, a recess for forming a management number formed by rugged characters is previously inscribed for each core. By using the core with the inscribed recess, the cast iron pipe with the management number formed for each pipe is manufactured, and the manufacturing history data and the shipping destination data of the cast iron pipe are stored for each management number, thereby managing the manufacturing history and the shipping destination for each cast iron pipe by the management number.

Description

  The present invention relates to a method for managing a production history and a shipping destination of a cast iron pipe, and in particular, a method for managing a manufacturing history and a shipping destination of a cast iron pipe capable of reliably managing the production history and the shipping destination for each cast iron pipe. It is about.

  Conventionally, for example, a cast iron pipe used as a water pipe with a mortar lining on the inner surface has been manufactured as follows.

  As shown in FIG. 4, a mold 2 having a receiving end casting core 1 at one end is rotated at a high speed by a driving device 3, and a molten metal 5 is poured into a mold 2 rotating at a high speed from a rod 4 to centrifuge the raw tube 6. After casting, the machined pipe 6 is machined and finished, subjected to a water pressure test, the outer surface of the pipe is coated, and then the inner surface of the pipe is mortar-lined, and the mortar It was manufactured by applying a seal coat to the surface of the lining.

  On the outer end surface (S1) of the flange 7A formed in the receiving port 7 of the cast iron pipe manufactured in this way, as shown in FIG. 5, the manufacture year, pipe diameter, pipe type, pipe type or lot of the cast iron pipe Characters and symbols indicating numbers and the like (hereinafter collectively referred to as characters) are formed by uneven characters. In the illustrated example, only number 3 is formed.

  Here, the pipe type is classified according to the shape and dimensions of the receiving port and the insertion port of the cast iron pipe, and the tube type is classified according to the usable pressure.

  In order to form the character on the outer end surface (S1) of the flange 7A formed in the receiving port 7 of the cast iron pipe, as shown in FIG. 4, the surface (S2) of the core 1 corresponding to the outer end surface (S1). The concave portions corresponding to the characters are previously formed by a stamping machine.

  Conventionally, as described above, cast iron pipes have been managed by forming irregular characters on the outer end face of the flange formed at the receiving port of the cast iron pipe. It was impossible to accurately grasp the manufacturing history and the shipping destination for each tube.

  Accordingly, an object of the present invention is to provide a method for managing a production history of a cast iron pipe and a shipping destination, which can surely grasp the manufacturing history and the management of the shipping destination for each cast iron pipe.

  The present invention has been made to achieve the above object, and is characterized by the following.

  According to the first aspect of the present invention, a concave portion for forming a control number formed by concave and convex characters is formed on the surface of the core for casting the casting port corresponding to the outer end surface of the flange formed at the receiving port of the cast iron pipe to be cast. Pre-engraved every time, using the core with the recesses engraved, manufacture a cast iron pipe with the management number formed for each one, production history data and shipping destination of the cast iron pipe for each management number The data is stored, and thus the manufacturing history and the shipping destination for each cast iron pipe are managed by the management number.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the recess is automatically formed for each core.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the surface of the core forming the recess is impregnated with resin before the recess is formed in the core. It is what has.

  According to the present invention, a recess for forming a control number formed by concave and convex characters is imprinted in advance on the core for casting the receiving port for each core, and casting is performed using this core. It is possible to reliably grasp the manufacturing history and the management of the shipping destination every time. Therefore, even if a trouble occurs, the shipping destination of the cast iron pipe can be specified immediately, so that the risk can be minimized. Moreover, since unified management can be performed for each cast iron pipe, further reliability and safety of the cast iron pipe can be ensured.

It is a figure which shows the flow of the management method of this invention. It is a front view which shows the aspect which stamps the recessed part which forms the management number which consists of uneven | corrugated characters on a core. It is a front view which shows the outer side end surface of the flange of the receptacle in which the management number which consists of uneven | corrugated characters was formed.

  Next, an embodiment of the method for managing the production history of the cast iron pipe and the shipping destination according to the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a flow of the management method of the present invention.

  As shown in FIG. 1, in the present invention, first, a management number made up of concave and convex characters is assigned to the surface (S2) of the core 1 for casting the casting port corresponding to the outer end surface of the flange formed on the receiving port of the cast iron pipe to be cast. The recess to be formed is imprinted in advance for each core. As shown in FIG. 2, the recess is marked by a known electromagnetic dot marking type stamping machine 8.

  The indentation of the concave portion can be automatically performed by the engraving machine 8 installed at a fixed position by moving the core 1 along the line. At this time, the engraving pin 9 is elongated for dot marking, so that even if the core 1 has a protruding portion (P), a recess is formed over the entire surface of the core 1 for receiving port casting (S2). It can be formed accurately. Further, for example, if a resol type phenol resin is applied to the surface (S2) of the core 1 and impregnated with the resin, the recesses can be formed more clearly.

  The reason why the core shown in FIG. 2 is different from the core shown in FIG. 4 is because the shape of the receiving port is different.

  In this way, when the concave portion for forming the control number is formed on the flange of the receiving port on the surface (S2) of the core 1 by the stamping machine 8, the control number is used using the core. The cast pipe formed with is manufactured.

  FIG. 3 shows an example of the outer end surface (S1) of the flange of the receiving port on which the management number made up of uneven characters is formed. In FIG. 3, “922” indicates the manufacturing date, and “123” indicates the management number. In FIG. 3, “100” indicates the tube diameter, “NS” indicates the tube type, “10” indicates the year of manufacture, “D3” indicates the tube type, and “water” indicates Indicates that it is a water pipe. These characters are formed for each lot.

  Thus, if the cast iron pipe in which the management number was formed for every one is manufactured, the manufacture history of the cast iron pipe corresponding to the management number will be acquired.

  Next, the management number is photographed with a camera to obtain image data. Then, a shipping destination is input for each management number before shipping, and the manufacturing history and shipping destination for each cast iron pipe are managed by the management number.

  As a result, even if a trouble occurs, by calling the management number, the shipping destination of the cast iron pipe can be immediately identified, so that the risk can be minimized. Moreover, since unified management can be performed for each cast iron pipe, further reliability and safety of the cast iron pipe can be ensured.

  As described above, according to the present invention, a management number is formed for each cast iron pipe, and the management history and the management of the shipping destination can be reliably grasped for each cast iron pipe by this management number. As a result, even if a trouble occurs, the shipping destination of the cast iron pipe can be immediately identified, so that the risk can be minimized. Moreover, since unified management can be performed for each cast iron pipe, further reliability and safety of the cast iron pipe can be ensured.

1: Core 2: Mold 3: Drive device 4: Fence 5: Molten metal 6: Raw pipe 7: Receptor 7A: Flange 8: Stamping machine 9: Stamping pin

It is a figure which shows the flow of the management method of this invention. It is a front view which shows the aspect which stamps the recessed part which forms the management number which consists of uneven | corrugated characters on a core. It is a front view which shows the outer side end surface of the flange of the receptacle in which the management number which consists of uneven | corrugated characters was formed. It is sectional drawing which shows a centrifugal casting method. It is a fragmentary perspective view which shows the flange in which the uneven | corrugated character was formed.

Claims (3)

  On the surface of the core for casting corresponding to the outer end surface of the flange formed in the receiving port of the cast iron pipe to be cast, a concave portion for forming a control number formed by uneven characters is pre-marked for each core, and the concave portion is Using a stamped core, manufacture a cast iron pipe in which the management number is formed for each one, and store the production history data and the shipping destination data of the cast iron pipe for each management number, thus, A manufacturing history of a cast iron pipe and a management method of a shipping destination, wherein the manufacturing history and shipping destination of each cast iron pipe are managed by a management number.   The method for managing a production history and a shipping destination of a cast iron pipe according to claim 1, wherein the concave portion is automatically formed for each core.   The invention according to claim 1 or 2, characterized in that a resin is impregnated on a surface of the core that forms the concave portion before the concave portion is formed in the core. The manufacturing history of a cast iron pipe and the management method of a shipping destination of description.

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