KR20030071564A - Double pipe manufacturing apparatus - Google Patents

Abstract

PURPOSE: Manufacturing equipment for a double pipe or a corrugate type double pipe is provided to reduce the number of mold blocks by rapidly returning the mold block in a non-mold area. CONSTITUTION: Manufacturing equipment for a double pipe or a corrugate type double pipe has a molding machine. A plurality of upper mold assemblies, installed to an upper mold to rotate in the endless track type, and a plurality of lower mold assemblies, installed to a lower mold to rotate in the endless track type, are each combined in a mold area and each separated in a non-mold area. A return screw(240) is rotatably installed to the non-mold area. A screw thread(241) is formed to the return screw to guide rollers(232) installed to both sides of the mold assembly(230).

Description

Double pipe or corrugated double pipe manufacturing facility {DOUBLE PIPE MANUFACTURING APPARATUS}

The present invention relates to a facility for producing a corrugated double tube or a general double tube consisting of a flat inner tube and an uneven outer tube.

In general, a manufacturing facility for manufacturing a synthetic resin double pipe or a multi pipe is an extruder 100 for extruding a liquid resin as shown in FIGS. 1 and 2 and a vacuum suction method and / or a material continuously extruded from the extruder. Alternatively, a molding machine 200 which is formed into a predetermined shape by being diffused outward by a continuous blow method to be adsorbed on the inner surface of the mold is a main configuration.

In addition, a cooler 300 for cooling the forming pipe, a cutter 400 for cutting the continuous forming pipe to a predetermined length, a stacker 500 for loading the cut double pipe is also included.

However, such a conventional double pipe manufacturing equipment has the following problems.

1. The molding machine 200 is formed at the inlet side (in) of the molding machine while the upper mold block 200 and the lower mold block 400 are rotated in a reverse direction in an endless track shape, and then to the outlet side (out). As the state continues to be transferred, the molding operation is performed.

At this time, as shown in Figure 3 in the molding section (M) adjacent mold blocks can be molded in close contact with each other, but in the non-molding section (NM), although it is not necessarily crowded in the conventional equipment is a molding block in the entire section There is a problem that the number of installation of the mold block increases because it is concentrated over.

2. Base plate 50 for adjusting the distance between upper and lower molds 210 and 220 or supporting each mold block in order to replace the mold block larger than the currently installed mold block for the purpose of manufacturing a large diameter tube as shown in FIG. 4. Must be replaced with a thin thickness t.

At this time, in the former case, it is not easy to precisely adjust the upper and lower molds to the size of the mold block to be replaced, and the adjustment work takes a lot of time.

In the latter case, since the distance between the mold block and the guide rail 60 is determined, in order to replace with a large mold block, it is inevitably replaced with a thin base plate 50. Therefore, it is time consuming to adjust the mold block because it requires a cumbersome procedure of separating the base plate from the guide rail, separating the mold block and the base plate, and combining new base plates. There is a problem that each must be provided with a base plate suitable for the size.

3. As shown in FIG. 4, the mold blocks 20 and 40 for producing corrugated pipes have suction holes 22 and 42 formed in the circumferential direction to suck the material into the valleys 21 and 41 therein. As the suction hole is formed at regular intervals, the surface shape and the surface unevenness of the outer layer pipe are not good due to the difference in the suction force near the suction hole and the suction force at the portion where the suction hole is not formed. There is this.

Accordingly, the present invention has been made to solve the above problems, the first object of the present invention is to provide a double pipe that can reduce the number of mold blocks through the structural improvement to enable the rapid return of the mold block in the non-molded section Another object is to provide a corrugated double pipe manufacturing facility.

The second object of the present invention is a double pipe or corolla which enables easy replacement of a mold block by enabling only a spacer without replacing or correcting other parts when replacing a small mold block to a large mold block or a large mold block to a small mold block. It is to provide a gate type double pipe manufacturing equipment.

The third object of the present invention is to improve the structure of the suction portion of the mold block so that evenly suction force is generated when the liquid resin is sucked toward the inner surface of the mold block so that the surface shape and surface roughness of the pipe can be improved. To provide a type double pipe manufacturing equipment.

1 is a side configuration diagram of a typical double pipe manufacturing equipment

Figure 2 is a plan view of a typical double pipe manufacturing equipment

3 is a detailed view of a conventional molding machine

4 is a block diagram of a conventional mold assembly

5 is a detailed view of the molding machine in the double pipe manufacturing equipment according to the present invention

Figure 6 is a detailed view of the mold assembly and the return screw according to the invention

7 is a detailed view of a mold block according to the present invention.

8 is a view showing the configuration of a power means and a power transmission means for driving the upper and lower molds in the molding machine according to the present invention.

9 is a detailed configuration of the power transmission means according to the invention

10 is a block diagram showing a gap adjusting means of the upper and lower molds (top view)

11 is a corrugated double pipe manufactured by the present invention manufacturing equipment

[Description of Symbols for Main Parts of Drawing]

210. Upper mold 220. Lower mold

230. Mold assembly 231. Base plate

232.Rollers 233. Spacers

234. Mold Block 236. Goal

237. Suction Home 238. Suction Hall

240. Return screw 241. Spiral mount

255. Drive Gear 253 ~ 257. Children gear

258. Lower Chain Gear 259. Upper Chain Gear

260. Driven rotating plate M. Molding section

NM. Non-molded section

The present invention for achieving the above object

A double pipe with a plurality of upper mold assemblies installed in the upper mold to be rotated in a caterpillar and a plurality of lower mold assemblies installed in the lower mold to be rotated in a caterpillar in a forming section and mutually separated in a non-molding section. In the manufacturing facility, it is characterized in that the return screw is formed to be rotatable spirally formed so that the roller is provided on both sides of the mold assembly in the non-molding section.

In addition, the upper and lower mold assemblies are slidably coupled to the guide rails provided on the outer periphery of the upper mold and the lower mold, and a base plate provided with rollers on both sides thereof, a spacer slidably coupled to the base plate, and on the spacer. Characterized in that consisting of a mold block slidingly coupled to.

In addition, the power transmission means for moving the mold assembly is a drive gear installed on the lower mold side to be rotated by a drive motor, and the gear teeth are fitted between the rollers of the lower mold assembly, respectively installed in front and rear of the lower mold. At least one of the lower chain gear connected to the drive gear, a plurality of idle gears which are connected in the vertical direction from the drive gear and idling, and gear teeth between the rollers of the upper mold assembly are respectively installed in front and rear of the upper mold. The upper chain gear in the fitted state, characterized in that consisting of a driven rotating plate coupled to the upper chain gear while being connected to the upper chain gear.

In addition, a plurality of upper mold assemblies including a mold block having an uneven inner surface and being rotated in an endless track on an upper mold, and a lower mold assembly including a mold block having an uneven inner surface and being rotated in an orbit in a lower mold. In a corrugated double pipe manufacturing facility having a molding machine which is coincided in a molding section and rotates to be separated from each other in a non-molding section, the return screw having a spiral mount is rotated so that the rollers installed on both sides of the mold assembly are guided to the non-molding section. It is characterized in that the installation possible.

In addition, the suction groove is formed in the circumferential direction in the valley corner portion of each mold block, characterized in that the suction hole is formed in the suction groove.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 11.

The double pipe or corrugated double pipe manufacturing equipment of the present invention is one or a plurality of extruders 100 for extruding the liquid resin, as shown in Figure 1 and 2, and a molding machine for molding the extruded liquid resin into a predetermined shape ( 200, a cooler 300 for cooling the molded tube, a cutter 400 for cutting the molded tube to a predetermined length, and a stacker 500 for loading the cut double tube.

In the molding machine 200, the upper mold 210 and the lower mold 220 are installed in the up and down directions by four support columns 201 as shown in FIGS. 5 and 6, and the upper mold ( A guide rail 202 is installed on the entire outer circumference of the 210 and the lower mold 220, and a plurality of upper and lower mold assemblies 230 are installed to move in a caterpillar form on the outer circumference of the guide rail.

At this time, the upper and lower mold assembly 230 is slidably coupled to the guide rail 202, as shown in Figure 5 and the base plate 231, the rollers 232 is installed on both sides and the slide on the base plate The spacer 233 is coupled in a manner, and the mold block 234 is coupled in a slide manner on the spacer.

In addition, in the configuration of the mold block, in the case of a mold block for forming a corrugated double tube, as shown in FIG. 7, an uneven portion for forming a corogate shape on the inner surface of the mold block 234 on the surface of the outer layer pipe ( 235 is formed, and the suction groove 237 is formed in the corner portion of the valley 236 of the uneven portion in the circumferential direction, and the suction hole 238 is formed in the suction groove.

In addition, as shown in FIG. 6, in the non-molding section NM of the upper mold 210 and the lower mold 220, the return screw 240 having the spiral mount 241 on which the roller 232 is guided is rotatable. The upper and lower molding assemblies 230 in the non-molding section were able to be rapidly fed back. This can achieve the effect of reducing the number of installation of the mold assembly.

The power means and the power transmission means for driving the upper and lower molding assemblies 230 are configured as follows (see FIGS. 8 and 9).

The power means is a drive motor 250 is applied, the power transmission means drive gear 252 is connected to the reduction gear 251 for reducing the rotational power of the drive motor 250 as shown in Figure 8 and 9 And first, second, third, fourth, and fifth idler gears 253 to 257 which are sequentially connected upwardly from the driving gear, and the rollers 232 of the lower mold assembly, respectively, installed in front and rear of the lower mold 220. Among them, the gear teeth are inserted between the lower gears 258 connected to the driving gear 252, and the rollers 232 of the upper mold assembly are installed in front and rear of the upper mold 210, respectively. The upper chain gear 259 in which the gear teeth are fitted between the two, and the driven rotating plate 260 coupled to the upper chain gear 259 while being coupled to the fifth idler gear 257 located on the uppermost layer.

In this case, reference numerals 261 and 262 denote connection links that support one side of the driving gear 252 and the idle gears 253 to 257.

In addition, as shown in FIG. 10, a screw shaft 270 is installed at each corner of the upper mold 210 and the lower mold 220, and a plurality of screw shafts 270 and a chain are formed at one side of the lower mold 220. A vertical gap adjusting motor 272 and a rotational force of the motor connected to the lower mold and operated to simultaneously rotate the screw shaft 270 when the upper and lower gaps of the upper mold 210 are adjusted about the lower mold. Reducer 273 is provided for deceleration

And, the upper and lower interval adjustment of the lower mold 220 is automatically or by a power transmission means consisting of a chain gear and chain screw jack 274 (see Fig. 8) installed at each corner of the lower mold 220. Manual adjustment

The present invention configured as described above is a manufacturing facility for manufacturing a general double pipe or a corrugated double pipe, as an example will be described the operation of the corrugated double pipe manufacturing equipment.

First, when the upper mold 210 and the lower mold 220 is turned on in a state set to suit the length or other conditions of the double pipe for manufacturing, the drive motor 250 is driven, the reducer connected to the drive motor ( The drive gear 251 rotates by properly decelerating the rotational power of the drive motor to the drive gear 252 connected to the reducer shaft.

First, second, third, fourth, and fifth idle gears 253 to 257 are connected to the drive gear 252 so that each idle gear is rotated by the rotational force of the drive gear, and the drive gear 252 has a lower portion. Since it is connected to the chain gear 258, the lower chain gear is rotated at the same time as the drive gear 252 is rotated, the upper chain gear 259 is a driven bolt bolted to the fifth idler gear 257, the upper idle gear Since it is connected to the rotary plate (), the driven rotary plate 260 and the upper chain gear 257 rotates with the rotation of the fifth idler gear 257.

At this time, since the gear teeth of the upper and lower chain gears 258 and 259 are sandwiched between the rollers 232 installed on both sides of the mold assembly 230, the gear teeth move the roller 232 in the advancing direction as the two chain gears rotate. By pushing, the mold assembly can be rotated (see FIG. 8).

In addition, the upper and lower mold assemblies 230 are rotated in an endless track, but rotate in opposite directions, and start to coincide with each other in front of the molding machine 200. In the molding section M, the upper and lower mold assemblies 230 are in close contact with each other. By maintaining the shape of the tubular body is formed in the upper and lower mold block 234, and the upper and lower mold assembly 230 is separated from the rear of the molding machine 200, the molded tube (double tube) is discharged.

In this case, the number of mold assemblies can be reduced by installing a return screw 240 for rapidly returning the upper and lower mold assemblies 230 to the non-molding section NM of the upper and lower molds 210 and 220.

That is, the upper and lower mold assemblies 230 are driven by the upper and lower chain gears 258 and 259 in sections other than the return screw 240, but the spiral mounts 241 formed on the outer circumference of the return screw when the upper and lower mold assemblies are folded. Since the rollers 232 provided on both sides of the upper and lower mold assemblies 230 are guided along the spiral surface of the mold), the moving speed of the mold assemblies is determined by the pitch of the helical peak.

Therefore, when the pitch of the spiral mount 241 is increased, the mold assembly 230 proceeds faster than the traveling speed in the region other than the return screw 240. In this case, the mold assembly does not need to be closely connected and is rapidly progressed. Since it is not possible, the number of mold assemblies can be reduced.

In addition, since the mold assembly 230 is advanced while being spaced apart while passing through the return screw 240, the mold assembly 230 may effectively release heat generated in the mold assembly through the spaced gaps.

And, in order to manufacture a double pipe of a large diameter it must be replaced with a mold block suitable for it. In this case, when the spacer 233 installed between the mold block 234 and the base plate 231 is separated, a space equal to the height of the separated spacer is secured, so that a large mold block can be easily coupled.

In addition, in the case of the mold block 234 for forming the corrugated double pipe, the inner surface thereof is concave-convex, and the suction groove 237 is formed along the corner portion of the valley 236 of the concave-convex portion 235. By forming the suction hole 238 in the suction groove, an even suction force is generated toward the inner surface of the mold block 234. Therefore, since the material is adsorbed evenly on the inner surface of the mold block 234, it is possible to improve the surface shape and surface roughness of the tube, thereby producing a good product.

As described above, the present invention

It is effective in reducing the number of mold blocks through structural improvement that enables rapid return of mold blocks in non-molding sections.

In addition, when replacing from a small mold block to a large mold block, or from a large mold block to a small mold block, it is possible to easily replace the mold block by enabling only the spacer without replacement or correction of other parts,

In addition, by improving the structure of the suction portion of the mold block, even when the liquid resin is sucked toward the inner surface of the mold block, an even suction force is generally generated, thereby improving the surface shape and surface roughness of the tube.

Claims (7)

A double pipe with a plurality of upper mold assemblies installed in the upper mold to be rotated in a caterpillar and a plurality of lower mold assemblies installed in the lower mold to be rotated in a caterpillar in a forming section and mutually separated in a non-molding section. In manufacturing facilities, And a return screw (240) having a spiral mount (241) formed thereon so that the rollers (232) provided on both sides of the mold assembly (230) are guided to the non-molding section (BM). The method of claim 1, The mold assembly 230 is slidably coupled to the guide rail 202 installed on the outer circumference of the upper mold 210 and the lower mold 220, and a base plate 231 having rollers 232 installed on both sides thereof. Double pipe manufacturing equipment, characterized in that consisting of a spacer 233 is slidingly coupled on the base plate, a mold block 234 is slidingly coupled on the spacer. The method of claim 1, The power transmission means for moving the mold assembly 230 includes a drive gear 252 installed to be rotated by the drive motor 250 on the lower mold 220 side, and installed in front and rear of the lower mold, respectively. While the gear teeth are inserted between the rollers of the assembly, any one of the lower chain gears 258 connected to the drive gears, a plurality of idle gears 253 to 257 connected up and down from the drive gears and idling, and The upper chain gear 259 which is installed in front and rear of the upper mold 210 and the gear teeth are inserted between the rollers of the upper mold assembly, and the driven rotating plate coupled to the uppermost idle gear 257 while being connected to the upper chain gear. Double pipe manufacturing equipment, characterized in that consisting of (260). A plurality of upper mold assemblies including a mold block having an inner concave-convex shape and being rotated in a caterpillar shape on the upper mold, and a lower mold assembly including a mold block having a concave-convex inner surface and being rotated in a caterpillar shape in the lower mold In the corrugated double pipe manufacturing equipment having a molding machine that is matched in the section and rotated separately from each other in the non-molded section, Corrugated double pipes, characterized in that the return screw 240 formed with a spiral mount 241 is rotatably installed to guide the rollers 232 installed on both sides of the mold assembly 230 in the non-molding section (BM). Manufacturing equipment. The method of claim 4, wherein The mold assembly 230 is slidably coupled to the guide rail 202 installed on the outer circumference of the upper mold 210 and the lower mold 220, and a base plate 231 having rollers 232 installed on both sides thereof. A corrugated double pipe manufacturing facility comprising a spacer 233 slidingly coupled to a base plate and a mold block 234 slidingly coupled to the spacer. The method of claim 4, wherein The power transmission means for moving the mold assembly 230 includes a drive gear 252 installed to be rotated by the drive motor 250 on the lower mold 220 side, and installed in front of and behind the lower mold, respectively. While the gear teeth are inserted between the rollers of the assembly, any one of the lower chain gears 258 connected to the drive gears, a plurality of idle gears 253 to 257 connected up and down from the drive gears and idling, and The upper chain gear 259 which is installed in front and rear of the upper mold 210 and the gear teeth are inserted between the rollers of the upper mold assembly, and the driven rotating plate coupled to the uppermost idle gear 257 while being connected to the upper chain gear. Corrugated double pipe manufacturing equipment, characterized in that consisting of (260). The method of claim 4, wherein Suction groove (237) is formed in the circumferential direction in the corner portion of the valley 236 of each mold block 234, a suction hole 238 is formed in the suction groove characterized in that the corrugated double pipe manufacturing equipment.