JP4590212B2 - Manufacturing method of long water pipe made of synthetic resin - Google Patents

Description

The present invention relates to the production how water supply hot water or for air-conditioning used for piping (including the road heating), a synthetic resin of a long water passage tube.

Conventionally, as a water pipe made of synthetic resin used in the piping or for cooling and heating water supply hot water, in general, polybutylene te down tube, polypropylene tubes or cross-linked polyethylene pipe was used. For polybutylene te down tube Toka polypropylene tube (generally, 20M～120m more) long by extrusion fabricated, then it was bundled by winding it into circularly. And it was stored and sold in its wound state. In the case of a cross-linked polyethylene pipe, the polyethylene pipe was extruded in the same manner as described above, and then the pipe was wound and crosslinked in the wound state.

  However, the water pipe has a strong curl due to the winding state, and this curl has not been eliminated even if the binding is released. Therefore, there has always been difficulty in piping work due to curling.

In particular,
・ When inserting a water pipe into a sheath pipe, it was difficult to work because it required a very large pulling force into the sheath pipe due to the winding of the water pipe. In some cases, the tube cannot be inserted into the sheath tube unless the water tube is straightened to remove the curl.
-In the case of an exposed pipe that does not allow the water pipe to be inserted into the sheath pipe, it was difficult to pipe along the desired path because of the curl of the water pipe. That is, for example, in order to perform piping in a straight shape, it is necessary to use many saddles at short intervals and perform piping while correcting.
・ When a water pipe is used for floor heating piping, the water pipe is fitted into the floor groove, but this piping work is difficult, and the water pipe tends to pop out even after fitting, so the workability is poor. It was.
-When cutting a water pipe, it was difficult to cut so that the cut surface was perpendicular to the pipe axis. And when a cut surface is diagonal, the shortage of the insertion dimension which inserts a water flow pipe into a joint etc. will arise, there was a possibility that proper connection may not be made and it may cause water leakage.

  Further, the cross-linking in the wound state, such as the above-mentioned cross-linked polyethylene pipe, further strengthens the curl of the pipe, and the above problem is more serious.

  Further, when the water pipes bound in the wound state are released when they are piped, they are greatly spread outward due to their own rigidity, and handling is extremely inconvenient. Then, the drawing form which guarded the outer side of the tube bundle used as the winding state and pulled out from inner side was considered. However, when it is pulled out from the inside of the tube bundle, it is pulled out in a spiral shape by the winding rod, so that it is necessary to rotate the tube axis around the tube to return the twist. This operation is very difficult because the tube axis is bent by the curl.

  Some water pipes are configured to be covered with a heat insulating material made of a foamed resin material in order to keep the hot water flowing inside. However, when piping the water pipe, there is a possibility that the heat insulating material is broken by the force of the winding pipe and the heat insulating effect is hindered.

The present invention has been made to solve the conventional disadvantages mentioned above, it is an object, it is possible to reduce the curl, provide a manufacturing how the synthetic resin of a long water passage pipe There is to do.

Producing how the synthetic resin of a long water passage tube according to the invention, in order to achieve the object, comprising the following configuration. That is,
The manufacturing method of the synthetic resin long water pipe which concerns on invention of Claim 1 is a manufacturing method of the synthetic resin long water pipe used for piping for water supply hot water supply or air conditioning. The manufacturing method includes forming a synthetic resin tube having the same length as the long water pipe in the final product form using a synthetic resin material, and the long water pipe in the final product form. same is formed into a length, the synthetic resin tube, when fully extended in straight, crosslinked order to shape memory the straight state, the crosslinking step and the winding synthetic resin tube cross-linked with a straight state as well as times, tying to maintain the wound state, and the spirally wound combining process, that have a. Thus, the long water passage pipe, the molding process, after the final product form synthetic resin pipe of a long water passage tube and the same length of the molded, in the crosslinking step, the long final product form molded into the same length as the water pipe, the synthetic resin tube, it is crosslinked in a state of being stretched straight, the straight state is shape memory. Therefore, even if the synthetic resin tube is wound in the subsequent winding and binding step, the winding wrinkle is hardly attached.
Moreover, the manufacturing method of the long water pipe made from a synthetic resin which concerns on invention of Claim 2 is a manufacturing method of the long water pipe made from a synthetic resin used for piping for water supply hot water supply or air conditioning. The manufacturing method includes forming a synthetic resin tube having the same length as the long water pipe in the final product form using a synthetic resin material, and the long water pipe in the final product form. The synthetic resin pipe formed in the same length is cross-linked in a state where the synthetic resin pipe is stretched in a straight shape so as to memorize the straight state, and the outer periphery of the synthetic resin pipe cross-linked in the straight state. A coating process, and a synthetic resin tube coated with the heat insulating material is wound in a covering state of the heat insulating material, and is bound to maintain the wound state. And a process. Thus, after the synthetic resin pipe having the same length as the long water pipe of the final product form is formed by the molding process, the long water pipe of the long water pipe of the final product form is formed by the crosslinking process. The synthetic resin pipe formed to the same length as the water pipe is cross-linked in a straightened state, and the straight state is memorized. Therefore, even if the synthetic resin tube is wound after the outer periphery of the synthetic resin tube is covered with the heat insulating material in the subsequent coating step and the winding and binding step, the curl is hardly attached.

Moreover, in the manufacturing method of the long water pipe of Claim 1 or 2 like the manufacturing method of the long water pipe made of the synthetic resin which concerns on invention of Claim 3 , in the said bridge | crosslinking process, in the last, formed into the elongated through water pipe same length and of such product forms, the synthetic resin tube, when fully extended in straight, and a plurality of contained in the container, it is desirable to crosslink.

According to the manufacturing how the synthetic resin of a long water passage tube according to the present invention, the final product form synthetic resin pipe molded in the same length and a long water passage tubes were stretched straight Since it is crosslinked in a state and its straight state is memorized, even if the synthetic resin tube is wound after that, its curl can be reduced.

Will be described below with reference the best mode for carrying out the manufacturing how the synthetic resin of a long water passage tube according to the invention with reference to the drawings.

Figure 1 through 4 show an embodiment of the manufacturing how long water passage tube made of synthetic resin according to the present invention. Reference numeral 1 in the drawing is a long water pipe made of synthetic resin used for piping for hot water supply or hot water supply or air conditioning (for example, indoor air conditioning or outdoor load heating). Reference numeral 2 denotes a tube bundle of the long water flow tube 1 in a wound state.

Nagashakudori water pipe 1, the cross-linking polybutylene te down, cross-linked polyethylene, such as cross-linked polypropylene, consisting of cross-linked synthetic resin tube. And this elongate water pipe 1 has the length of about 20m-120m, for example.

As shown in FIG. 1, the manufacturing method of this elongate water pipe 1 consists of a formation process, a bridge | crosslinking process, and a winding binding process. Here, the forming step is a step of forming a long synthetic resin tube 1a from a synthetic resin material. The synthetic resin pipe 1a is polybutylene te down, polyethylene, polypropylene or the like, a tube made of synthetic resin, for example, is formed by extrusion molding.

  The cross-linking step is a step of cross-linking the molded synthetic resin tube 1a so that the straight state is memorized in a straight state. In this cross-linking step, for example, the synthetic resin pipe 1a having the same length as the long water pipe 1 in the final product form is placed in the heating container 3 (curing room) while being straightened. . In the illustrated embodiment, the container 3 is made of a pipe material in which a plurality of synthetic resin pipes 1a are accommodated. The container 3 is long and has, for example, a structure in which half pipes 3a and 3a formed in half are connected to each other by a hinge 3b so as to be opened and closed. Therefore, the synthetic resin pipes 1a and 1a can be easily taken in and out of the container 3. Then, after the synthetic resin tubes 1a and 1a are accommodated in the container 3, steam, hot water, or the like is fed into the container 3, and is cured at, for example, 80 ° C. for 8 hours.

  The winding and binding step is a step of winding the synthetic resin pipe 1a cross-linked in the straight state and binding it so as to maintain the winding state. Here, the term “winding” includes not only the case of winding in a circular shape but also the case of winding in, for example, an 8-shaped shape. Then, when binding the tube bundle 2 in a wound state, a binding tool 4 such as a band is used (see FIG. 4).

  In this way, the long water pipe 1 as a product as shown in FIG. 4 is completed. That is, the long water pipe 1 made of synthetic resin is cross-linked by a synthetic resin material so that the long synthetic resin pipe 1a is stretched in a straight shape and the shape of the straight state is memorized. After that, it is wound and bound.

  Next, the effect of the long water flow pipe 1 which consists of the above structure and its manufacturing method is demonstrated. After the synthetic resin pipe 1a is molded by the molding process, the long water pipe 1 is crosslinked in a state where the synthetic resin pipe 1a is stretched in a straight shape and the straight state is stored in the shape memory. Is done. Therefore, even if the synthetic resin tube 1a is wound in the subsequent winding and binding step, the curl is hardly attached, and the curl can be reduced. In this way, the long water pipe 1 can be easily inserted into the sheath pipe in the piping work of the long water pipe 1 because the curl of the long water pipe 1 is reduced. Also, in the case of an exposed pipe that is not inserted into the sheath pipe, the pipe can be easily piped along a desired path. Moreover, even when this long water pipe 1 is used, for example, for floor heating pipes, fitting pipes into the floor pipe grooves can be easily performed, and the long water pipe 1 jumps out even after fitting. Is suppressed, and its workability is improved. Further, when the long water pipe 1 is cut, it is easy to keep the long water pipe 1 in a straight state, and it becomes easy to cut the cut surface so as to be perpendicular to the pipe axis. Therefore, the long water flow pipe 1 can be accurately inserted into the joint or the like, and the connection by the joint or the like can be ensured.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, as shown in FIGS. 5 to 7, in the method for manufacturing the long water pipe 1, a packing step may be added after the winding and binding step. For example, the packing process is performed by packing the tube bundle 2 in a wound state so as to guard the outer peripheral surface 2a and the side surfaces 2b and 2b and to open the inner peripheral surface 2c, and from the inner peripheral surface 2c side. It is formed so that it can be pulled out while unwinding. Here, in packaging, for example, as shown in FIGS. 6 and 7, a packaging box 5 made of cardboard is used. And in this packing box 5, it takes out for pulling out the long water flow pipe 1 to the center part of one side wall 5a (in the illustrated embodiment, the upper wall) that guards the side surface 2b of the tube bundle 2. The window 5b is opened. However, the extraction window 5b is open when the long water pipe 1 is pulled out, but may be closed when packed. And when pulling out the elongate water pipe 1, naturally the binding tools 4 and 4 are cut | disconnected or removed. In this way, the synthetic resin-made long water passage tube 1 is to be stored in the shape of the straight state in a state where the synthetic resin tube 1a formed into a long shape by the synthetic resin material is straightened. After being cross-linked, the tube bundle 2 wound and bundled is packed so that the outer peripheral surface 2a and the side surfaces 2b and 2b are guarded and the inner peripheral surface 2c is opened, and From the inner peripheral surface 2c side, it is formed so as to be able to be drawn outward while unwinding the winding state. And according to this long water pipe 1, since the outer peripheral surface 2a and the side surfaces 2b and 2b are guarded in the tube bundle 2 which became the winding state in addition to the above-mentioned effect, this long water pipe 1 In this piping work, the long water pipe 1 can be pulled out from the opened inner peripheral surface 2c side while preventing the long water pipe 1 from spreading and spreading outward.

  Moreover, as shown in FIG. 8, the manufacturing method of the elongate water pipe 1 may add a coating | coated process between a bridge | crosslinking process and a winding binding process. In this covering step, the outer periphery of the synthetic resin tube 1a is covered with a heat insulating material such as a foamed resin material. And the elongate water pipe 1 as a product is completed through the winding and binding process which is a subsequent process. In this way, the synthetic resin-made long water passage tube 1 is to be stored in the shape of the straight state in a state where the synthetic resin tube 1a formed into a long shape by the synthetic resin material is straightened. After the cross-linking, the outer periphery of the synthetic resin tube 1a is covered with a heat insulating material, and is wound and bound in a covered state of the heat insulating material. According to this long water flow pipe 1, after the synthetic resin pipe 1a is formed, the synthetic resin pipe 1a is cross-linked in a straightened state, and the straight state is memorized. Therefore, even if the synthetic resin tube 1a is wound after the outer periphery of the synthetic resin tube 1a is covered with the heat insulating material, the curl is hardly attached and the curl can be reduced. Further, in this embodiment, a packaging step may be added after the winding and binding step, as in the embodiment shown in FIGS.

  Further, the container 3 (curing room) used in the cross-linking step is not limited to the pipe material, and has any structure as long as it can accommodate and cure the synthetic resin pipe 1a. Also good.

  Further, in the packing process, the long water pipe 1 can be drawn outward from the inner peripheral surface 2 c side of the tube bundle 2, but a part of the packing box 5 facing the outer peripheral surface 2 a of the tube bundle 2 is removed. By opening, it may be possible to draw the tube bundle 2 outward from the outer peripheral surface 2a side.

It is a figure explaining the manufacturing process of the elongate water pipe of one embodiment of this invention. Similarly, it is the front view which fractured | ruptured a part which shows a bridge | crosslinking process. Similarly, it is sectional drawing by the AA in FIG. Similarly, it is a perspective view which shows a elongate water pipe. It is a figure explaining the manufacturing process of the elongate water pipe of other embodiment of this invention. Similarly, it is sectional drawing which shows a long water flow pipe. Similarly, it is a B arrow view in FIG. It is a figure explaining the manufacturing process of the elongate water flow pipe of other embodiment of this invention.

1 Long water pipe 1a Synthetic resin pipe 2 Tube bundle
3 containers

Claims (3)

A method for producing a long water pipe made of synthetic resin used for piping for water supply or hot water supply or air conditioning,
A molding step of molding a synthetic resin pipe having the same length as the long water pipe in the final product form with a synthetic resin material,
Molded into the final product the long water passage pipe same length and form, the synthetic resin tube, when fully extended in straight, crosslinked order to shape memory the straight state, the crosslinking step,
Winding the synthetic resin tube crosslinked in the straight state, and binding to maintain the wound state, a winding and binding step,
Method for manufacturing a synthetic resin of a long water passage pipe, characterized in Rukoto to have a. A method for producing a long water pipe made of synthetic resin used for piping for water supply or hot water supply or air conditioning,
A molding step of molding a synthetic resin pipe having the same length as the long water pipe in the final product form with a synthetic resin material,
Molded into the final product the long water passage pipe same length and form, the synthetic resin tube, when fully extended in straight, crosslinked order to shape memory the straight state, the crosslinking step,
Covering the outer periphery of the synthetic resin pipe crosslinked in the straight state with a heat insulating material; and
Winding and bundling step of winding the synthetic resin pipe coated with the heat insulating material in a covering state of the heat insulating material, and binding to maintain the wound state;
Method for manufacturing a synthetic resin of a long water passage pipe you characterized by have a. Wherein in the crosslinking step, identical to the final product form the long water passage tube of molded in length, the synthetic resin tube, while if Shin rectilinearly, and a plurality of housed in a container , cross-linked to the production method of the synthetic resin of a long water passage tube according to claim 1 or 2, characterized in Rukoto.

Images