KR102309202B1 - Manufacturing mold for handrail - Google Patents

Abstract

The present invention relates to a handrail manufacturing mold for molding a handrail comprising: a horizontal part with a built-in wire; a round part in which both ends of the horizontal part are rounded in a lower inner direction; and a nonwoven fabric continuously coupled to the lower ends of the horizontal part and the round part. The manufacturing mold comprises: a first mold for extruding a first extrudate by first injecting molten resin with the nonwoven fabric inserted therein; and a second mold for extruding a second extrudate by second injecting the molten resin after the first extrudate and the wire are inserted. The present invention comprises the first mold for molding the first extrudate by injecting the molten resin with the nonwoven fabric inserted therein and the second mold in which the first extrudate is seated, the wire supplied from a wire supply unit is inserted on the upper part of the first extrudate, and the molten resin is additionally injected to mold the second extrudate, thereby reducing working time and improving handrail quality.

Description

Handrail Manufacturing Mold {MANUFACTURING MOLD FOR HANDRAIL}

The present invention relates to a handrail manufacturing mold for manufacturing a handrail applied to an escalator or the like.

In general, handrails applied as handles to escalators and the like are moved together with people, so it is a trend that is being developed to be strong and usable for a long time for safety.

As an example, in the prior art Laid-Open Patent Publication No. 10-2018-0018768, there is a method of extruding an article of a uniform cross section, the article comprising a thermoplastic material and at least one cable for suppressing elongation of the article, the method supplying at least one cable to each at least one tube, the tube comprising an upstream end and a downstream end, a length extending between the upstream end and the downstream end, and internal dimensions; conveying through the tube between the A method is disclosed, comprising cooling and solidifying the extrudate, wherein at least one of the length and internal dimensions of the tube is selected to at least impede movement of the loose winding of the cable from the downstream end of the tube to the upstream end.

However, the conventional techniques have problems in that the extrusion operation is complicated, the production speed is slow, and the quality of the handrail is short due to poor quality.

Republic of Korea, Patent Registration No. 10-2247291 Republic of Korea, Registered Patent Publication, No. 10-1571996

The present invention has been devised to solve this problem, and an object of the present invention is to provide a handrail manufacturing mold in which the productivity is improved because the nonwoven fabric, the wire and the synthetic resin are integrated in the process of continuously extruding the synthetic resin.

The present invention relates to a handrail manufacturing mold, comprising: a horizontal part in which a wire is embedded; a round part in which both ends of the horizontal part are rounded in a lower inner direction; and a nonwoven fabric continuously bonded to the horizontal part and the lower end of the round part. In the handrail manufacturing mold for molding a handrail, the manufacturing mold comprises: a primary mold for extruding a primary extrudate by first injecting a molten resin in a state in which a nonwoven fabric is inserted, and the primary extrudate; and a secondary mold for extruding the secondary extrudate by injecting the molten resin secondary after the wire is inserted.

In addition, the primary mold, the primary upper mold communicating with the heating chamber, the first lower mold disposed under the primary upper mold and elevating and lowering by the elevating driving unit, the amount of the upper surface of the first lower mold It includes a primary lower mold including a pair of second lower molds respectively mounted on the edges, and a first cavity formed in a space between the first upper mold and the first lower mold.

In addition, the secondary mold includes a secondary upper mold communicating with the heating chamber, a first lower mold disposed under the secondary upper mold and elevating and lowering by an elevating driving unit, both edges of the upper surface of the first lower mold It includes a secondary lower mold including a pair of second lower molds respectively mounted on the , and a second cavity formed in a space between the secondary upper mold and the second lower mold.

In addition, at the rear end of the primary mold, a plate-shaped base plate disposed at the rear end of the lower mold and a long nonwoven fabric are mounted on the upper surface of the base plate in the direction in which the nonwoven fabric is transported, and the vertical cross section of the handrail has the same shape. It is characterized in that the guide part is installed on the jig, and a plurality of guide rollers installed on the base plate and disposed on both sides of the jig to guide the nonwoven fabric to be seated in the correct position of the jig.

In addition, in the upper mold of the primary mold, an injection hole through which the molten resin is injected from the heating chamber, a runner that delivers the molten resin injected through the injection hole to the first cavity, and the first cavity to receive the resin from the runner It is formed, characterized in that the gate is formed to be spaced forward from the injection hole is formed.

In addition, the first cavity includes a first horizontal portion having a shape corresponding to the horizontal portion of the handrail, and corresponding to the round portion of the handrail. It is characterized in that it comprises a first round portion formed to be long, a first protrusion formed to extend downwardly at the end of the first round portion, the lower end is bent outwardly.

In addition, in order to form the first protrusion, a first forming groove having a vertical cross section is formed in the first lower mold, and a second forming protrusion having a round shape in a vertical cross section is formed in the second lower mold corresponding thereto. , Due to this, the inner surface of the first protrusion is in a rectangular shape and the outer surface is characterized in that it is provided to have a round shape.

Therefore, the present invention provides a primary mold in which molten resin is injected with a nonwoven fabric inserted therein to mold a primary extrudate, and the primary extrudate is seated therein, and the wire is placed on top of the primary extrudate. The wire supplied from the supply unit is inserted and the molten resin is additionally injected, including a secondary mold to mold the secondary extrudate, which has a remarkable effect in that the working time is shortened and the quality of the handrail is improved.

1 is a cross-sectional view of a handrail manufactured by a manufacturing mold of the present invention.
2 is a photograph showing the use of the manufacturing mold according to the present invention.
3 is a perspective view of a primary mold according to the present invention.
FIG. 4 is a cross-sectional view taken along line AA′ of FIG. 3 .
FIG. 5 is a cross-sectional view taken along line BB′ of FIG. 3 .
6 is an enlarged view of the guide unit according to the present invention.
7 is a cross-sectional view of the secondary mold according to the present invention.

Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

Since the accompanying drawings are merely examples shown to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.

1 is a cross-sectional view of a handrail manufactured by a manufacturing mold of the present invention.

The handrail manufactured by the present invention is molded by extrusion. As shown in FIG. 1 , looking at the shape of the handrail 10 manufactured by the handrail manufacturing mold according to the present invention, the handrail is As a member having a long length as a whole, it includes a horizontal portion 12 and a round portion 14 in which both ends of the horizontal portion are rolled in a lower inner direction.

In addition, the handrail is extruded from a synthetic resin, and a plurality of wires 18 and a nonwoven fabric 16 are provided in a long embedded form along the longitudinal direction of the handrail.

The wire is embedded in the horizontal part, and the nonwoven fabric is continuously coupled to the inner surface of the horizontal part and the round part.

At this time, the wire (metal cable) is formed to be spaced apart from the upper side of the nonwoven fabric by a predetermined interval.

Here, the nonwoven fabric is a fabric made of PP material formed long in the longitudinal direction of the handrail, and the wire is a metal cable in a state in which a steel wire is twisted, but the material of the handrail, the nonwoven fabric and the wire is not limited to the present invention.

2 is a photograph showing the use of the manufacturing mold according to the present invention.

The manufacturing mold of the present invention is mounted on the extrusion device 20 to extrude the synthetic resin beads into a specific shape.

The extrusion device in the present invention is disposed between the nonwoven fabric and the wire supply device (not shown) and the transport device (not shown), and the extrusion device applies the synthetic resin to the nonwoven fabric transported forward by the transport device. will be prepared

In general, the extrusion device includes a supply hopper into which the synthetic resin beads dehumidified in the dehumidifying unit are put, a heating chamber 22 provided to communicate with the supply hopper, a heating band mounted on the outer periphery of the heating chamber, and the inside of the heating chamber It includes a screw installed in the mold 1000 to mold the molten resin molten in the heating chamber into a specific shape, and a piston that pressurizes the molten resin inside the heating chamber to the mold side and transfers it.

The handrail manufacturing mold 1000 according to the present invention includes a primary mold 100 and a secondary mold 300 .

In the present invention, the primary mold and the secondary mold are respectively mounted on separate extrusion devices, but according to the design of the operator, a separate manifold is placed inside one extrusion device so that the molten resin discharged from one extrusion device is 1 It may be provided to be injected into the primary mold and the secondary mold, respectively.

As shown in FIG. 2 , the primary mold and the secondary mold are all composed of upper and lower molds, and the primary mold 100 and the secondary mold 300 include a heating chamber 22 and The communicating upper molds 120 and 320, and the lower molds 140 and 340 disposed at the lower part of the upper mold and elevating and lowering by the elevating driving unit 24 are included.

The elevating driving unit in the present invention is provided so that the bellows-shaped elevating member is elevated by a driving means, but the elevating driving unit is an element for elevating and lowering the lower mold, the present invention is not limited thereto No.

The primary mold 100 is an element in which the molten resin is first injected in a state in which the nonwoven fabric is inserted into the primary mold, and the primary extrudate is molded,

The secondary mold 300 is an element in which the primary extrudate molded in the primary mold is seated therein, and the molten resin is secondary injected after an additional wire is inserted to mold the secondary extrudate am.

The primary mold and the secondary mold continuously apply a synthetic resin to the nonwoven fabric transferred forward by the conveying device so that the extrudate is extruded lengthwise along the longitudinal direction of the nonwoven fabric.

In other words, the nonwoven fabric inserted into the rear end of the primary mold is extruded through the front end of the primary mold, and the primary extrudate and wire inserted into the rear end of the secondary mold are extruded through the front end of the secondary mold.

That is, the nonwoven fabric is transferred forward by the transfer device, passes through the primary mold and the secondary mold sequentially, and the molten resin is applied to the surface to undergo a process of fusion, thereby completing molding.

Hereinafter, the primary mold 100 will be described.

3 is an exploded perspective view of the primary mold according to the present invention, FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 3, and FIG. 5 is a cross-sectional view taken along line B-B' of FIG. 3 .

The primary mold is an extrusion mold, and a first inlet having a first cavity shape is formed at the rear end of the primary mold, and a first outlet having a first cavity shape is formed at the front end, and through the first inlet A nonwoven fabric is inserted into the first cavity.

As shown in Figure 3, the primary mold, the primary upper mold 120 in communication with the heating chamber, the secondary lower mold ( 140).

The first upper mold 120 and the first lower mold 140 are provided to be fastened and separated from each other in the vertical direction, and as the first upper mold and the first lower mold are fastened, the first upper mold and the first lower mold A first cavity 160 is formed between the molds, and the molten resin injected into the primary mold is molded into the shape of the first cavity.

For stable coupling of the first upper mold and the first lower mold, a fastening protrusion 121 is formed on a bottom surface of the first upper mold, and a fastening groove 141 corresponding to the fastening protrusion is formed on the upper surface of the first lower mold. this is formed

In more detail, the first upper mold 120 is formed with a nozzle part 130 into which the molten resin is injected.

The nozzle unit 130 includes an injection hole 132 through which the molten resin is injected from the heating chamber, a runner 134 that delivers the molten resin injected through the injection hole to the first cavity, and the runner to receive the resin from the runner. and a gate 136 formed in the first cavity.

The injection hole is formed on the upper surface of the upper mold, the gate is formed on the bottom surface of the upper mold, and the runner is formed inside the upper mold and is a passage connecting the injection hole and the gate.

In particular, the gate 136 is formed on the lower side of the injection hole, and is disposed to be spaced apart from the injection hole in the front (transfer direction of the nonwoven fabric), so that the molten resin is applied to the nonwoven fabric passing through the primary mold at the front end of the primary mold. Make sure it is applied evenly.

The runner 134 is provided so that the cross-sectional area gradually increases toward the front (gate side direction), and the gate is provided with a long hole as long as the width of the handrail so that the molten resin applied to the upper surface of the nonwoven fabric through the gate is uniformly formed. do.

Next, a first lower mold 140 is provided at a lower portion of the first upper mold 120 to face the first upper mold.

The first lower mold 140 is a first lower mold 142 that is mounted on the upper part of the elevating driving unit and elevating and lowering by the elevating driving unit, and is mounted on both edges of the upper surface of the first lower mold, respectively. and a pair of second lower molds 144 .

The second lower mold 144 is an element for more easily forming the first cavity, and the second lower mold is a first lower mold for easily forming the round part 14 of the handrail. It is fixedly coupled to both edges of the upper surface of the

As shown in FIG. 5 , the first cavity 160 includes a first horizontal portion 162 provided in a horizontal direction, a first round portion extending at both ends of the first horizontal portion and rounded in the lower inward direction. (164), the first protrusion 166 is formed extending in the lower direction at the end of the first round portion is bent outwardly the lower end.

The first horizontal portion and the first round portion are elements corresponding to the horizontal portion 12 and the round portion 14 of the handrail, and are provided to have a thickness of less than 40% compared to the finished product of the handrail.

The first protrusion 166 is an element corresponding to the end of the round portion 14 of the handrail, and is formed to protrude further inward and downward compared to the finished handrail product.

Accordingly, the primary extrudate manufactured through the primary mold is provided such that the end of the handrail round part is over-molded by the first protrusion compared to the finished handrail product.

The first protrusion is an element for precisely molding the round part of the handrail, and the first protrusion over-molded through the primary mold is deformed so that its shape corresponds to the finished product through the secondary mold.

In particular, in order to form a first protrusion in the lower mold 140 , a first molding groove 42 is formed in the first lower mold 142 , and a second molding groove 42 is formed in the corresponding second lower mold 144 . A forming protrusion 44 is formed.

The vertical cross section of the first forming groove 42 is rectangular, and the vertical cross section of the second forming protrusion 44 is provided to have a round shape. It is provided to have a round shape, and when the first protrusion is secondarily molded in a secondary mold to be described later, it is re-molded into a shape corresponding to the round part 14 of the handrail 10 .

Meanwhile, the primary mold further includes a guide unit 180 mounted on the rear end of the primary lower mold to guide the transfer of the nonwoven fabric.

The guide part 180 is mounted only on the primary mold, and the guide part is an element that allows the nonwoven fabric inserted into the primary mold to be deformed into a specific shape.

6 is an enlarged view of the guide unit according to the present invention.

As shown in FIG. 6 , the guide unit 180 is mounted on the plate-shaped base plate 182 disposed at the rear end of the primary lower mold, and the upper surface of the base plate along the direction in which the nonwoven fabric is transported. and a plurality of guide rollers 186 installed on the base plate and disposed on both sides of the jig to guide the nonwoven fabric to be seated in the correct position of the jig 184 .

The guide part 180 is an element provided to allow the nonwoven fabric to enter the inside of the primary mold in a shape corresponding to the vertical cross-section of the handrail.

To this end, the jig 184 has a long length, and is provided to have a horizontal portion and a round portion in the same shape as the handrail, and a plurality of guide rollers for guiding both edges of the nonwoven fabric are provided on both sides of the jig. is mounted

The guide roller is provided to rotate with the rotation shaft mounted in the vertical direction on the base plate 182, and rotates together as the nonwoven fabric is transported forward to guide the transport of the nonwoven fabric.

In particular, the guide roller is provided in a shape corresponding to the side surface of the jig so that the nonwoven fabric is transported in a state in close contact with the jig,

The guide roller 186 includes a first protrusion 82 corresponding to the upper surface of the horizontal part of the jig, a guide groove 84 extending under the first protrusion, and a guide groove 84 corresponding to the side surface of the round part of the jig; It is formed to extend under the guide groove, and includes a second protrusion 86 corresponding to the bottom surface of the round part of the jig.

That is, on the outer periphery of the guide roller, the first protrusion, the guide groove, and the second protrusion are continuously formed from the top to the bottom.

In particular, the second protrusion is formed to protrude more outward than the first protrusion so that both edges of the nonwoven fabric are completely rolled in the lower inner direction.

In addition, a long-hole fastening groove 188 is formed on the upper surface of the base plate 182 in a direction crossing the transfer direction of the handrail.

The fastening groove is an element for mounting the rotation shaft of the guide roller, and as the fastening groove is formed into a long hole, the operator can change the position of the guide roller according to the shape or width of the jig.

Next, the primary extrudate molded in the primary mold is transferred to the secondary mold by a transfer device.

The secondary mold is installed in front of the primary mold, and the primary extrudate is provided to be introduced into the secondary mold by a transfer device.

A second inlet in the shape of a second cavity is formed at the rear end of the secondary mold, and a second outlet in the shape of a second cavity is formed at the front end, and the wire and the primary extrudate are fed into the second cavity through the second inlet. inserted inside.

A wire supply device (not shown) for supplying wires to the inside of the secondary mold is separately installed at the rear of the secondary mold, and the wire is seated on the upper surface of the primary extrudate introduced into the secondary mold. In this state, the molten resin is additionally applied to the top so that the nonwoven fabric, wire, and synthetic resin are integrally molded.

7 is a cross-sectional view of the secondary mold according to the present invention.

The secondary mold 300 includes a secondary upper mold 320 and a secondary lower mold 340 that are fastened and separated from each other in the vertical direction, and as the upper mold and the lower mold are fastened, the secondary upper mold is fastened. And a second cavity 360 is formed between the secondary lower mold.

That is, the primary extrudate injected into the secondary mold is molded into a second cavity shape together with the wire transferred into the secondary mold and the molten resin additionally injected.

The secondary upper mold 320 is formed with a nozzle part into which the molten resin is injected, and the nozzle part injects the molten resin from the heating chamber into the injection hole (not shown) and the molten resin injected through the injection hole into the second cavity. It includes a runner (not shown) that transfers to the runner, and a gate (not shown) formed in the second cavity to receive the resin from the runner.

The injection hole and the gate of the secondary mold are preferably provided adjacent to each other to improve molding efficiency.

Next, a secondary lower mold 340 is provided at a lower portion of the secondary upper mold 320 to face the secondary upper mold.

The secondary lower mold 340 includes a first lower mold 342 mounted on the upper part of the elevating driving part 24 of the upper mold and elevating and lowering by the elevating driving part, and the amount of the upper surface of the first lower mold. It includes a pair of second lower molds 344 respectively mounted on the edges.

As shown in FIG. 7 , the second cavity 360 has the same shape as the vertical cross-section of the handrail 10 , and the second cavity includes a second horizontal portion 362 provided in a horizontal direction, the second cavity 360 , 2 It is formed extending at both ends of the horizontal portion and includes a second round portion 364 formed to be rounded in the lower inward direction.

The second horizontal portion and the second round portion are elements corresponding to the horizontal portion 12 and the round portion 14 of the handrail.

The area of the second horizontal part and the second round part and the area of the first horizontal part and the first round part formed in the first mold are provided to have a ratio of 7:3,

In particular, the over-molded first protrusion 166 in the primary mold flows into the second round part 364 of the secondary mold and is transformed into the shape of the secondary round part while filling the secondary round part.

The semi-finished handrail molded in the secondary mold through this process is then cooled through a cooling device, etc., and manufactured into a finished product.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only for explaining the invention, and those of ordinary skill in the art to which the present invention pertains can obtain various modifications or equivalents from the detailed description of the invention. It will be appreciated that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical spirit of the claims.

10: handrail
12: horizontal part
14: round part
16: non-woven fabric
18: wire
20: extrusion device
22: heating chamber
24: Elevating Ganggu Dongbu
100: primary mold
120: 1st upper mold
122: fastening protrusion
130: nozzle unit
132: inlet
134: runner
136: gate
140: primary lower mold
141: fastening groove
142: first lower mold
144: second lower mold
160: first cavity
162: first horizontal part
164: second round
166: first protrusion
180: guide unit
182: base plate
184: jig
186: guide roller
188: fastening groove
82: first projection
84: guide home
86: second projection
300: secondary mold
320: secondary upper mold
340: secondary lower mold
342: first lower mold
344: second lower mold
360: second cavity
362: second horizontal part
364: second round part

Claims (3)

A handrail manufacturing mold for forming a handrail comprising a horizontal portion in which a wire is embedded, a round portion in which both ends of the horizontal portion are rounded in a lower inner direction, and a nonwoven fabric continuously coupled to the horizontal portion and the lower end of the round portion In
The manufacturing mold is
The first upper mold in communication with the heating chamber,
A primary lower mold including a first lower mold disposed below the primary upper mold and elevating and lowering by an elevating driving unit, and a pair of second lower molds respectively mounted on both edges of the upper surface of the first lower mold class,
Including a first cavity formed in the space between the first upper mold and the first lower mold, in a state in which the nonwoven fabric is inserted into the first cavity, the molten resin is first injected to extrude the first extrudate mold;
A secondary upper mold communicating with the heating chamber,
A secondary lower mold including a first lower mold disposed under the secondary upper mold and elevating and lowered by an elevating driving unit, and a pair of second lower molds respectively mounted on both edges of the upper surface of the first lower mold class,
and a second cavity formed in the space between the second upper mold and the second lower mold, wherein after the first extrudate and the wire are inserted into the second cavity, the molten resin is secondarily injected to form the second extrudate A secondary mold for extrusion molding; a handrail manufacturing mold comprising a.
According to claim 1,
The first cavity is
a first horizontal portion having a shape corresponding to the horizontal portion of the handrail;
A first round portion corresponding to the round portion of the handrail, which is formed to extend at both ends of the first horizontal portion and is formed to be rounded in the lower inward direction;
and a first protrusion extending downwardly from an end of the first round portion and having a lower end bent outwardly.
The method of claim 1,
At the rear end of the first mold,
a plate-shaped base plate disposed at the rear end of the primary lower mold;
A jig is mounted on the upper surface of the base plate along the direction in which the nonwoven fabric is transported and has the same vertical cross section as that of the handrail;
A handrail manufacturing mold installed on the base plate and disposed on both sides of the jig to provide a guide part including a plurality of guide rollers for the nonwoven fabric to surround the outer periphery of the jig.

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