KR102076806B1 - A device for manufacuring a plastic pipe - Google Patents

Abstract

According to an embodiment of the present invention, an apparatus for manufacturing a plastic pipe, comprises: a first manufacturing unit for forming a strip formed of plastic; a second manufacturing unit for winding the strip produced by the first manufacturing unit to form a plastic pipe; a transfer unit disposed between the first and second manufacturing units, and transferring the strip produced by the first manufacturing unit to the second manufacturing unit; and a cutting unit disposed at one side of the second manufacturing unit to cut the plastic pipe produced by the second manufacturing unit by a predetermined length. The strip produced by the first manufacturing unit includes a base part and a rib part erected from both sides of the base part. The second manufacturing unit may form the plastic pipe by spirally winding the strip.

Description

Plastic Pipe Making Equipment {A DEVICE FOR MANUFACURING A PLASTIC PIPE}

The following embodiments relate to a plastic pipe manufacturing apparatus.

 The present invention relates to an apparatus for producing plastic pipes.

The flat and impact strength to be provided as a plastic pipe is good, and PVC (polyvinyl chloride) is a commonly used and easily accessible material.

However, PVC is a material containing a chlorine-based material that easily pollutes the environment has a disadvantage in that it is not environmentally friendly to the human body or the environment when processed and used. However, on the other hand, it is also true that PVC has excellent processability and excellent physical properties.

Therefore, various materials that are harmless to the human body as plastics, not PVC, have been researched and developed.

First, as a technique for producing a mixture of minerals in PP (polypropylene, polypropylene), a pipe having a three-layer structure containing CaCO 3 in the intermediate layer is known (Utility Model Registration No. 269737). These pipes are made of pure PP material in the outer and inner layers, and the middle layer is made of a mixture of PP and CaCO3.

This is a mixture of minerals, that is, CaCO3, in the middle layer, which gives a slight increase in strength (approximately 10% of the PP basic material) and increases the specific gravity of the pipe.

However, this is very unsuitable to be used for plumbing or embedding in buildings, because the flat strength is too low due to the inherent properties of PP. That is, the flat strength of the PP is about 50% of the PVC pipe is a situation that does not exceed the limit.

In addition, an olefin type so-called calpet commonly used as such a method is mixed and dissolved in a PP material. This has the disadvantage of using a compounded chip state product, but it is difficult to achieve the high cost as well as the flat and impact strength required by the product.

In addition, even a mixture of Calpet and PP does not increase the function, it is difficult to commercialize.

Looking at the production technology and production process of the pipe mixed with the conventional minerals, the main material PP is mixed with the chip state of the carpets as a subsidiary material is added to the general extruder to dissolve and then produced by the molding process .

In addition, there is conventionally provided connection ribs with at least partially undercut grooves and enlarged heads extending along the edges of the bands to interconnect adjacent band edges. A plastic band for making spiral wound pipes, wherein the ribs and grooves at both band edges have a complementary structure to each other.

It is known to produce plastic band wound pipes of the kind mentioned above. Apart from using single or double wall profiles or bands, the connections between adjacent band edges form a weak point of such a pipe. This problem is particularly dangerous for pipes under pressure during operation and for pipes built on the ground.

The above-mentioned snap connection between adjacent band edges has been suitable for materials with high elasticity, thus making it particularly suitable for producing insulated pipes for existing pipelines or electrical cables. However, in case of high stress, the connection site generally had to be provided with an additional protective coating or an additional sealing band.

Korean Laid-Open Patent Publication No. 2007-0043399 discloses a "plastic pipe extrusion mold and a pipe extruder using the same".

An object according to an embodiment is to provide a plastic pipe manufacturing apparatus that can prevent distortion on the strip by cooling and shrinking at different rates due to temperature differences in the process of cooling the extruded strip to manufacture the plastic pipe. It is.

An object according to one embodiment is to provide a plastic pipe manufacturing apparatus in which the inner diameter of a pipe manufactured by winding the extruded strip at a predetermined constant speed can be kept uniformly the same.

An object according to one embodiment is to improve the durability and prevent deformation of a manufactured plastic pipe by supplying coolant at the same temperature to each part of the plastic pipe in the process of winding the extruded strip to form the plastic pipe. It is to provide a plastic pipe manufacturing apparatus.

An apparatus for manufacturing a plastic pipe according to an embodiment may include: a first manufacturing unit forming a strip formed of plastic, a second manufacturing unit winding the strip generated in the first manufacturing unit to form a plastic pipe, and the first manufacturing unit And a transfer part disposed between the second manufacturing part and the transfer part for transferring the strip generated by the first manufacturing part to the second manufacturing part, and generated on the one side of the second manufacturing part. A cutting portion for cutting the plastic pipe to a predetermined length, the strip produced by the first manufacturing portion includes a base portion and a rib portion upstanding from both sides of the base portion, the second manufacturing portion being The plastic pipe can be formed by winding the strip spirally.

The first manufacturing unit includes a supply element for providing a material for manufacturing the strip, a liquefaction element for liquefying the material to form a gel; It may include an extrusion element for forming and extruding into a strip of a predetermined shape using the material formed in the form of a gel and a first cooling element for cooling the strip provided from the extrusion element.

The first cooling element may include a chamber for accommodating the strip, a plurality of feeders for supplying cooling water into the chamber, spaced at regular heights on an inner surface of the chamber, and corresponding to positions at which the plurality of feeders are disposed. And a plurality of sensors measuring the temperature of the coolant received at each height of the chamber, and a controller controlling the operation of the feeder based on the temperature value of the coolant measured by the sensor.

At this time, the coolant is accommodated in the chamber so that the strip passing through the chamber can be locked, and in the chamber, the coolant flows from one end to which the strip enters to the other end where the strip is taken out, and the controller The controller may control the operation of the feeder such that the temperature of the coolant contained in the chamber is maintained at the same temperature at each height of the chamber.

The second manufacturing unit, the spiral wound around the strip transmitted from the conveying unit at a predetermined constant speed, a rotating element for moving the wound portion forward, a guide element for guiding the strip on the rotating element, A heating element disposed outside the portion of the strip to provide heat on the strip for joining the strip so that the wound strip can be maintained in a pipe shape, providing a constant pressure at a predetermined value on the wound strip It may include a second cooling element for supplying cooling water on the surface of the strip to cool the strip bonded by the roller element and the heating element to a predetermined temperature.

The second cooling element includes a plurality of nozzles, each nozzle disposed to face the top, bottom or both sides of the wound strip, wherein the top, bottom or both sides of the wound strip are cooled to a predetermined temperature. Cooling water can be injected.

The cutting unit may include a first determination element and a first determination element that determine a portion for cutting the plastic pipe to a predetermined length based on a speed at which the plastic pipe transferred from the second manufacturing unit moves forward. It may include a cutting element for cutting a portion of the plastic pipe set and a guard element for preventing foreign matter from scattering to the outside when the plastic pipe is cut by the cutting element.

The plastic pipe manufacturing apparatus may further include an inspection unit for determining whether each of the plastic pipes that are cut and transmitted by the cutting unit is classified as a good product or a defective product.

The inspection unit, a first measuring element disposed on the side of the plastic pipe to measure the degree of distortion of the plastic pipe, a second measuring element disposed on the upper surface side of the plastic pipe to measure the degree of distortion of the plastic pipe, The third measuring element measuring whether the inside diameter of the plastic pipe is kept constant along the longitudinal direction and the degree of warpage of the plastic pipe measured by the first measuring element and the second measuring element are preset values. When the diameter of the inner side of the plastic pipe measured by the third measuring element is less than or equal to, it is determined as a good product and classified into one side, and the plastic measured by the first measuring element and the second measuring element. The degree of warping of the pipe exceeds the preset value or is If not specified keep the inner diameter of the plastic pipes of the constant may include a second determining factor is determined as a defective product classification side to the other.

The plastic pipe manufacturing apparatus according to an embodiment may prevent distortion on the strip by cooling and contracting at different speeds due to temperature differences in the process of cooling the extruded strip to manufacture the plastic pipe.

In the plastic pipe manufacturing apparatus according to an embodiment, the inner diameter of the manufactured pipe may be uniformly maintained by winding the extruded strip at a predetermined constant speed.

The plastic pipe manufacturing apparatus according to one embodiment improves the durability and deformation of the manufactured plastic pipe by supplying cooling water of the same temperature to each part of the plastic pipe in the process of winding the extruded strip to form the plastic pipe. It can prevent.

1 shows a plastic pipe manufacturing apparatus according to an embodiment.
Figure 2 shows a first cooling element of the first manufacturing part of the plastic pipe manufacturing apparatus according to an embodiment.
3 shows a second manufacturing part of the plastic pipe manufacturing apparatus according to an embodiment.
Figure 4 shows a cut portion of the plastic pipe manufacturing apparatus according to an embodiment.
5 shows an inspection unit of a plastic pipe manufacturing apparatus according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. The following description is one of several aspects of the embodiments, and the following description forms part of the detailed description of the embodiment.

However, in describing one embodiment, a detailed description of a known function or configuration will be omitted to clarify the gist of the present invention.

In addition, the terms or words used in this specification and claims are not to be interpreted in a common or dictionary sense, and the inventors may appropriately define the concept of terms in order to best describe their invention. Based on the principle of the present invention, it should be interpreted as meaning and concept corresponding to the technical idea of the plastic pipe manufacturing apparatus according to the embodiment.

Therefore, the configuration described in the embodiments and drawings described herein is only one of the most preferred embodiment of the plastic pipe manufacturing apparatus according to one embodiment, and represents all the technical idea of the plastic pipe manufacturing apparatus according to an embodiment It is to be understood that there may be various equivalents and variations in place of them at the time of the present application.

1 shows a plastic pipe manufacturing apparatus according to one embodiment, and FIG. 2 shows a first cooling element of a first manufacturing part of the plastic pipe manufacturing apparatus according to one embodiment. Figure 3 shows a second manufacturing part of the plastic pipe manufacturing apparatus according to an embodiment, Figure 4 shows a cut portion of the plastic pipe manufacturing apparatus according to an embodiment. 5 shows an inspection unit of a plastic pipe manufacturing apparatus according to an embodiment.

Referring to Figure 1, the plastic pipe manufacturing apparatus according to an embodiment, the first manufacturing unit 100 to form a strip formed of plastic, the second winding the strip generated in the first manufacturing unit to form a plastic pipe The manufacturing unit 200 is disposed between the first manufacturing unit and the second manufacturing unit, the transfer unit 300 for transferring the strip generated by the first manufacturing unit to the second manufacturing unit side, disposed on one side of the second manufacturing unit The cutting unit 400 for cutting the plastic pipe produced by the second manufacturing unit to a predetermined length and the inspection unit 500 to determine whether each of the plastic pipes cut and transmitted by the cutting unit is classified as a good or defective product. can do.

At this time, the strip produced by the first manufacturing portion may include a base portion and a rib portion upstanding from both sides of the base portion. That is, the strip produced in the first manufacturing unit may be formed in the shape of ''. In addition, the second manufacturing unit may form the plastic pipe by spirally winding the strip formed in the first manufacturing unit. Thereby, a spiral protrusion shape formed by joining the rib portions of the strip may be arranged on the surface of the manufactured plastic pipe.

The first manufacturing unit has a predetermined shape using a supply element (not shown) for providing a material for manufacturing the strip, a liquefaction element (not shown) for liquefying the material to form a gel, and a material formed in the form of a gel. It may include an extrusion element (not shown) to form and extrude into a strip of the first cooling element 110 for cooling the strip provided from the extrusion element.

In particular, referring to FIG. 2, the first cooling element 110 includes a chamber 111 containing a strip, a plurality of feeders 112 supplying cooling water into the chamber and spaced apart at regular heights from an inner surface of the chamber, Controller for controlling the operation of the feeder based on a plurality of sensors 113 for measuring the temperature of the coolant received at each height of the chamber and corresponding to the position where the two feeders are disposed and the temperature value of the coolant measured by the sensor 114 may be included.

The coolant is received in the chamber so that the strip passing through the chamber can be locked, in which the coolant flows from one end where the strip enters to the other end where the strip is taken out, and the controller controls the temperature of the coolant contained in the chamber to The operation of the feeder can be controlled to remain the same at a preset temperature at the height of.

That is, openings 115 and 116 may be formed at the front and rear surfaces of the chamber, respectively, through which strips may enter and exit, and the plurality of feeders and sensors may be disposed on the inner side of the chamber. In addition, the coolant is accommodated in the chamber so that the strip passing through the chamber can be locked, and the coolant in the chamber can flow from one end to which the strip enters toward the other end where the strip is taken out. As an example, the flow of cooling water contained in the chamber can be formed by artificially providing air pressure towards the other end of the chamber inside one end of the chamber into which the strip enters.

In addition, the controller may control the operation of the feeder such that the temperature of the coolant contained in the chamber is maintained at the same temperature as a whole. That is, based on the temperature value of the coolant at each height in the chamber measured by each sensor, new coolant can be continuously supplied so that the coolant temperature in all parts of the chamber remains the same. Accordingly, it is possible to prevent distortion from occurring by cooling and contracting at different speeds due to different temperature differences in the course of cooling the strip.

Referring to FIG. 3, the second manufacturing unit 200 spirally winds the strip S transmitted from the transfer unit at a predetermined constant speed and rotates the rotating element 210 to move the wound portion forward. Guide element 250 guiding onto the element, a heating element 220 disposed outside the portion of the strip to be wound to provide heat on the strip to join the strip so that the wound strip can be maintained in a pipe shape. The roller element 230 provides a constant pressure to a predetermined value on the wound strip and a second cooling element for supplying cooling water on the surface of the strip to cool the strip bonded by the heating element to a predetermined temperature. 240). Accordingly, the pipe P can be formed by the wound strip.

At this time, the second cooling element includes a plurality of nozzles, each nozzle is disposed to face the top, bottom or both sides of the wound strip, so that the top, bottom or both sides of the wound strip is cooled to a predetermined temperature. Cooling water can be injected. As a result, the adhesive force between the wound strips is uniformly formed, so that the overall rigidity of the pipe can be improved.

Referring to FIG. 4, the cutting unit 400 may include a first determining element (not shown) that determines a portion for cutting the plastic pipe to a predetermined length based on a speed at which the plastic pipe transferred from the second manufacturing unit moves forward. C), a cutting element 410 for cutting a portion of the plastic pipe set by the first determination element, and a guard element 420 for preventing foreign matter from scattering outward when the plastic pipe is cut by the cutting element. can do.

At this time, the cutting element 410 may be formed of a blade formed of a saw blade, the guard element 420 may be formed in a rectangular chamber shape.

Referring to Figure 5, the inspection unit 500 is disposed on the side of the plastic pipe (P), the first measuring element 510 for measuring the degree of warpage of the plastic pipe, disposed on the upper surface side of the plastic pipe to warp the plastic pipe By a second measuring element 520 measuring the degree, a third measuring element 530 measuring whether the inside diameter of the plastic pipe is kept constant along the longitudinal direction, and by the first measuring element and the second measuring element If the measured degree of warpage of the plastic pipe is less than or equal to a preset value and the inside diameter of the plastic pipe measured by the third measuring element 530 is kept constant, it is determined to be a good product and classified into one side and the first measuring element. And the degree of warpage of the plastic pipe measured by the second measuring element exceeds a preset value or is measured by the third measuring element. If the diameter of the side that does not remain constant may include a second determination element 540 for classifying side to the other is determined as defective. In this case, the first measuring element, the second measuring element, or the third measuring element may be formed of a camera.

The plastic pipe manufacturing apparatus including such a configuration may prevent distortion on the strip by cooling and shrinking at different speeds due to temperature differences in the process of cooling the extruded strip to manufacture the plastic pipe.

In addition, the plastic pipe manufacturing apparatus can keep the inner diameter of the manufactured pipe uniformly the same by winding the extruded strip at a predetermined constant speed, and in the process of winding the extruded strip to form the plastic pipe By supplying cooling water at the same temperature to each part of the pipe, it is possible to improve the durability and prevent deformation of the manufactured plastic pipe.

As described above, the embodiments have been described by the specific embodiments such as specific components and the limited embodiments and the drawings, but the embodiments are provided to help general understanding. In addition, the present invention is not limited to the above-described embodiments, and various modifications and variations are possible to those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the above-described embodiment, and all the things that are equivalent to or equivalent to the scope of the claims as well as the claims to be described later belong to the scope of the present invention.

100: first manufacturing unit
200: second manufacturing unit
300: transfer unit
400: cutting part
500: inspection unit

Claims (5)

A first manufacturing unit forming a strip formed of plastic;
A second manufacturing part which winds up the strip generated in the first manufacturing part to form a plastic pipe;
A transfer unit disposed between the first manufacturing unit and the second manufacturing unit to transfer the strip generated by the first manufacturing unit to the second manufacturing unit; And
A cutting part disposed at one side of the second manufacturing part to cut the plastic pipe generated by the second manufacturing part to a predetermined length;
Including,
The strip produced by the first manufacturing portion includes a base portion and a rib portion upstanding from both sides of the base portion,
The second manufacturing portion forms a plastic pipe by spirally winding the strip,
The first manufacturing unit,
A supply element providing a material for producing the strip;
A liquefaction element for liquefying the material to form a gel;
An extrusion element for forming and extruding a strip of a predetermined shape using the material formed in the form of a gel; And
A first cooling element for cooling the strip provided from the extrusion element;
Including,
The first cooling element,
A chamber containing the strip;
A plurality of feeders configured to supply cooling water to the chamber and to be spaced apart at a predetermined height from an inner surface of the chamber;
A plurality of sensors arranged corresponding to positions at which the plurality of feeders are arranged to measure temperatures of the cooling water received at each height of the chamber; And
A controller for controlling the operation of the feeder based on the temperature value of the coolant measured by the sensor;
Including,
Cooling water is contained in the chamber to lock the strip passing through the chamber,
In the chamber the coolant flows from one end to which the strip enters toward the other end to which the strip is taken out,
The controller controls the operation of the feeder so that the temperature of the coolant contained in the chamber is kept equal at a predetermined temperature at each height of the chamber,
Plastic pipe manufacturing device.
delete The method of claim 1,
The second manufacturing unit,
A rotating element which spirally winds the strip transferred from the conveying unit at a predetermined constant speed and moves the wound portion forward;
A guide element for guiding the strip onto the rotating element;
A heating element disposed outside the portion of the strip to be wound to provide heat on the strip to bond the strip so that the wound strip can be maintained in a pipe shape;
A roller element for providing a constant pressure at a predetermined value on the wound strip; And
A second cooling element supplying cooling water on a surface of the strip to cool the strip bonded by the heating element to a predetermined temperature;
Including,
The second cooling element includes a plurality of nozzles, each nozzle disposed to face the top, bottom or both sides of the wound strip, wherein the top, bottom or both sides of the wound strip are cooled to a predetermined temperature. Spraying coolant,
Plastic pipe manufacturing device.
The method of claim 3,
The cut portion,
A first determining element determining a portion for cutting the plastic pipe to a predetermined length based on a speed at which the plastic pipe delivered from the second manufacturing unit moves forward;
A cutting element for cutting a portion of the plastic pipe set by the first judging element; And
A guard element for preventing foreign matter from scattering outward when the plastic pipe is cut by the cutting element;
Containing,
Plastic pipe manufacturing device.
The method of claim 4, wherein
An inspection unit for determining whether each of the plastic pipes cut and transmitted by the cutting unit is defective and classifying the product as a good product or a defective product;
More,
The inspection unit,
A first measuring element disposed at a side of the plastic pipe to measure a degree of warpage of the plastic pipe;
A second measuring element disposed on an upper surface side of the plastic pipe to measure a degree of warpage of the plastic pipe;
A third measuring element for measuring whether the inside diameter of the plastic pipe is kept constant along the longitudinal direction; And
Quality goods when the degree of warpage of the plastic pipe measured by the first and second measuring elements is less than or equal to a preset value and the inside diameter of the plastic pipe measured by the third measuring element is kept constant It is classified as one side, and the degree of warpage of the plastic pipe measured by the first and second measuring elements exceeds a preset value or is determined inside the plastic pipe measured by the third measuring element. A second judging element for judging the defective product and classifying it as the other side when the diameter is not kept constant;
Containing,
Plastic pipe manufacturing device.

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