JP2003033928A - Manufacturing method and device for string-shaped resin molding body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture plural string-shaped resin molding bodies at the same time by using sheet-shaped base materials which are drawn out continuously. SOLUTION: A grooved molding body sheet is molded by progressing the sheet-shaped base material drawn out continuously along plural radial molding guides which are astringent to a proceeding direction and by bending them solidly by pressing and pressurizing spaces between the radial molding guide and the radial molding guide. The plural string-shaped molding bodies are manufactured by injecting a resin composition continuously into the grooved molding body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously producing a plurality of circular or irregular shaped resin moldings simultaneously.

[0002]

2. Description of the Related Art Chloroprene rubber or EP in a string form
The DM rubber molding is generally manufactured by horizontally extruding from a uniaxial rubber extruder and heating. Since these products have sufficient viscoelasticity when extruded from the extruder, they have good shape-retaining properties, and even if they are extruded onto a conveyor belt, they retain a circular or irregular shape and are heated. Round or irregular shaped products can be produced.

However, these cord-shaped rubber moldings are
Although it was extruded from the rubber extruder of the shaft, the number of extruded pieces is limited to one or two. The extruded molded body is extruded and molded on the belt as it is from the extruding die, and when extruding two or more, it is necessary to extrude products of the same thickness at the same speed. As a result, a plurality of products having the same thickness are simultaneously molded on the same conveyor. However, the above-mentioned extrusion method is limited to two pieces, and if there are three or more pieces, it is difficult to extrude under the conditions of the same speed and the same thickness. In addition, even if three or more extruders can be used to extrude three or more cord-shaped rubber moldings with the same speed and the same thickness, the subsequent heating will produce a product with the same thickness including molding shrinkage. Is extremely difficult in practice because the kneading and extrusion conditions of each extruder are slightly different. From the above, although the cord-shaped rubber molded body has good performance, it has low productivity and is very expensive, and its field of use is limited.

Thermosetting polyurethane, soft vinyl chloride,
When a resin such as phenol resin or reactive silicone resin is manufactured directly from the raw material using an extruder in the same manner as the rubber molding, the viscoelasticity is extremely small and the shape cannot be maintained. Is difficult. Therefore, for example, a two-step rubber method has been adopted in which raw materials are reacted in advance to synthesize a thermoplastic polyurethane resin or the like, and then the thermoplastic urethane resin is melt-extruded in a string shape. However, since this method involves a two-step process of the first step of polymer synthesis and the second step of melt extrusion, it is expensive and it is difficult to simultaneously manufacture a plurality of polymers. Further, since these products are thermoplastic and not thermosetting, they also have drawbacks such as low heat resistance and being unusable in a high temperature range.

A reactive resin composition having fluidity can be easily manufactured into a string-shaped resin molding by using a metal or resin mold material, but a long product cannot be manufactured and the productivity is low. It will be very expensive. Therefore, there has been a demand for a technique of directly manufacturing a plurality of cord-shaped resin molded bodies simultaneously from a raw material by a one-step method at low cost. There has also been a demand for a technique for producing not only a rectangular cross section but also a circular, elliptical, semi-circular, or other irregularly shaped string-shaped resin molded body.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the first object is to use a single sheet-shaped substrate and directly obtain a plurality of sheets from the raw material, specifically Is to provide a technique for continuously producing several to ten or more string-shaped resin molded bodies. A second object of the present invention is to provide a technique for simultaneously producing a plurality of cord-shaped resin molded bodies each having a cord-shaped self-forming skin at the same time. A third object of the present invention is to provide not only a quadrangular product but also a circular, oval, semi-circular or other irregularly shaped string-shaped resin molded body.

[0007]

The present invention relates to a method for producing a plurality of cord-shaped resin moldings using a sheet-shaped base material that is continuously fed out. The sheet-shaped base material on the radial-forming guide is almost always advanced on the radial-forming guide, and the sheet-shaped base material on the radial-forming guide is almost always advanced on the radial-forming guide at the same time. Sheet-like base material between each radial forming guide and the radial forming guide that fit,
While molding a sheet composed of a plurality of grooved molded bodies by three-dimensionally bending through a radial molding guide, or after molding, inject a resin composition into a plurality of main grooved molded bodies as a second step, That is, a plurality of string-shaped resin molded bodies characterized by being molded are continuously manufactured at the same time.

Resins usable as the string-shaped resin molding of the present invention include thermoplastic resins such as vinyl chloride, vinyl acetate, and polyurethane which do not have a reactive group already resinized, phenol resins and urea resins. And a reactive resin composition such as a polyurethane resin and a silicone resin.

The groove-shaped molded body formed from the sheet-shaped base material of the present invention includes a rectangular shape, a V-shape, a U-shape, a semi-circular shape and a semi-elliptical shape. However, the point is that any molded article having a groove shape may be used.

In the present invention, after the resin composition is injected into the groove-shaped molded product, the resin composition is cured in an open top shape, that is, a groove-shaped molded product having the sheet-shaped base material on the upper surface of the resin molded product. When it is not completely wrapped and is in direct contact with the outside air,
When the resin molded body is wrapped in a sheet-like base material by applying external pressure or the like to close or almost close the grooved molded body in the open state, and the skin condition of the resin molded body is the same all around. There is. As a method of completely sealing or incompletely sealing, a method of narrowing the upper end portion of the grooved molded body after injecting the resin composition and self-sealing it, or placing another sheet-shaped substrate on the upper surface of the grooved molded body The purpose can be achieved by a method of sealing. Here, incomplete sealing may not be completely sealed and may be opened by about 0.01 to several mm.
The reason is as described below. When the amount of the resin composition injected into the groove-shaped molded body is large, there is a case where the excess resin composition is allowed to escape and the shape dimensions of the plurality of string-shaped molded bodies are made constant.

The sheet-like substrate used in the present invention refers to a sheet-like substrate such as a film or paper, and is used alone or in combination with other materials. Specifically, the single sheet-shaped substrate includes kraft paper, polyethylene film, polypropylene film, polymethylpentene film, polyester film, polyamide film, polyimide film, Teflon (registered trademark) film, fiber, woven fabric, non-woven fabric, etc. Are not limited to these. Further, as the composite sheet-shaped substrate, a release paper having a release resin such as a silicone resin baked thereon, or a film or a film laminated paper further baked with a silicone resin having a releasability, a release material such as polymethylenepentene resin, etc. Paper or other film integrated with moldable resin, paper treated with oil, surface activity, etc.
There is a glass fiber reinforced Teflon resin sheet or the like, which may be appropriately selected and used depending on the properties of the resin molded body and the properties of the sheet-shaped substrate. A belt obtained by continuing the beginning and the end of the sheet-shaped substrate is also included in the scope of the present invention.

When the desired string-shaped resin molded product itself is produced, a sheet-like base material having a release paper may be selected, and when an integrated product with the sheet-like base material is desired, the releasability is improved. Instead, paper, woven fabric, non-woven fabric, or film having high adhesiveness may be selected.

The cord-shaped resin molded product of the present invention is a flexible molded product such as a polyurethane molded product, a soft vinyl molded product, a silicon molded product, an acrylic molded product, a hard polyurethane molded product, a hard phenol molded product, and a hard vinyl chloride molded product. It is also possible to manufacture a hard resin molded body such as a body, that is, if the resin composition has fluidity when injected into the grooved molded body, the resin molding can be performed regardless of whether the product is soft or hard. Included in the body range. Here, the string-shaped resin molded body refers to a long product whose product cross-sectional shape is basically the same, and a string-shaped rubber substitute,
Examples include rolls and pipes.

As a concrete method of forming a sheet composed of the present groove-shaped formed body, as a first step, the sheet-like base material continuously fed out is aligned with a plurality of radial forming guides which are converged in a plurality of advancing directions. , The sheet-shaped base material on the radial molding guide is almost always advanced on the radial molding guide, and at the same time, the sheet-shaped base material between the adjacent radial molding guides and the radial molding guide is interposed via the radial molding guide as a support. Then, the sheet is formed into a plurality of groove-shaped molded bodies by three-dimensionally bending by advancing while having a groove shape. In this case, the sheet-shaped base material is pressed between the adjacent radial forming guides through the radial forming guide to form a sheet composed of a plurality of groove-shaped formed bodies. As another example of the method, a plurality of groove-shaped molded bodies that are bent so as to converge in the radial direction are formed into a plurality of parallel guides so that the groove-shaped molded bodies are substantially parallel to the traveling direction of the sheet. And move them together, and between adjacent radial forming guides and radial forming guides, or between adjacent parallel guides and parallel guides,
Alternatively, in any of the above-mentioned three methods of both between the radial forming guides and the parallel guides, the sheet-like base material is pressed through the radial forming guides and / or the parallel guides to form a plurality of groove-like forming bodies. Sheets can be formed. Next, as a specific method for producing the string-shaped resin molded product of the present invention, a resin composition is injected into this groove-shaped molded product during the process of forming a sheet composed of a plurality of groove-shaped molded products using a radial molding guide. Or a sheet made of a plurality of grooved bodies bent so as to be radially converged by a radial forming guide is aligned so as to be substantially parallel to the traveling direction of the sheet made of grooved bodies. In some cases, the resin composition is injected after a plurality of groove-shaped molded bodies have been advanced in parallel with each other. That is, when the resin composition is injected while molding the grooved molded body with the one-step radial guide, the groove-shaped molded body is manufactured with the radial guide in the first step, and then the radial guide is used with the parallel guide or the like. Interruption,
Several developments are conceivable, such as injecting the resin composition and using the radial guide again, but the point is to inject the resin composition into the groove forming body as well as the process of manufacturing the groove forming body using the radial guide. Any molding step is included in the scope of the present invention. Also, after the resin composition has been poured into the grooved molding, molding is performed with the injection surface open, or the grooved surface is narrowed to completely or incompletely seal the grooved molding, or the surface is made of another material. There is a case where it is completely covered or is not completely sealed.

In the method for forming a groove-formed body of the present invention, between the device for continuously feeding the sheet-shaped substrate and the radial forming guide and / or between the radial forming guide and the parallel guide. It is preferable to provide a space. This space portion can absorb the strain of the sheet-shaped base material generated in the step of forming the sheet-shaped base material into the groove-shaped molded body.

According to the present invention, a plurality of radial forming guides for converging a traveling sheet-shaped base material in the traveling direction are used to advance the sheet-shaped base material along the radial forming guides so that a plurality of groove-shaped forming bodies are formed. The opening angle of the radial forming guide is 15 degrees or less, more preferably 10 degrees or less. When the opening angle is 15 degrees or more, the radial forming guide and the sheet-like base material on which the groove-formed body is being formed thereafter are wrinkled on both sides of the sheet-like base material and a sheet having a plurality of groove-formed bodies is obtained. Hateful.
It is considered that these phenomena are due to the small elongation of the sheet-shaped substrate. Similarly, it is formed of a plurality of groove-shaped molded bodies having the same shape, which causes problems such as wrinkles entering both sides of the sheet-shaped substrate in the deformable space immediately before the radial molding guide and the space immediately after the radial molding guide. It is difficult to obtain a sheet. Here, the opening angle of the radial forming guide refers to β in FIG. 13, and refers to the angle between the radial forming guide at the end of the radial forming guide and the parallel line in the traveling direction of the sheet-shaped substrate.

The sheet composed of a plurality of groove-shaped products of the present invention refers to a groove-shaped product as shown in FIG. 1, and refers to a long sheet having a groove-shaped product continuous in the length direction. The sheet composed of a plurality of groove-shaped molded products of the present invention is specifically a groove-shaped molded product which reaches from 2 to 10 or more from one sheet-shaped substrate. FIG. 1 is an example of a cross-sectional view of a sheet composed of a plurality of molded groove-shaped bodies, 1 in (a) is a sheet-shaped substrate, 11,
Reference numerals 12 and 13 are folding lines, similarly, 1 in (b) is a sheet-shaped substrate, 20, 21, 22, 23 and 24 are folding lines.
1 in (c) is a sheet-shaped substrate, 25, 26, 27, 28 are fold lines, 1 in (d) is a sheet-shaped substrate, 29, 30, 31
Is a fold line. Before forming a sheet composed of a plurality of groove-shaped molded bodies, there are cases in which the fold line is inserted in advance so that the fold line can be easily folded.
In order to make the shape of the sheet composed of a plurality of groove-shaped compacts molded from a single long sheet-shaped substrate and the dimension thereof accurate and to facilitate folding, it is preferable to insert a folding line before folding. It is preferable that these folding lines are provided in a direction that facilitates folding, depending on whether the traveling sheet-shaped substrate is folded upward or downward.

The folding line of the present invention may basically be any as long as it facilitates folding, but specifically, it depends on whether "line" or "perforation line" is provided on the sheet-shaped substrate. Can be achieved. As a method for inserting "streaks", as shown in FIG. 2, a roll 5 having a plurality of "male" projections 6 which are generally made in the bag-making industry and which make one round on the circumference.
And a roll 7 having a “female” groove 8 that also makes one round on the circumference, and a “streak” is formed by sandwiching the sheet-shaped substrate 1. If the bending directions are not the same, the same "male" is used for each of the upper and lower sandwich rolls.
Or, if the “female” and “female” are not formed, the “female” and “male” are formed on one roll depending on the position so that the “male” and “female” mesh when the upper and lower rolls are aligned. good. As another method, as shown in FIG. 3, a perforated "non-continuous penetrating cut" reaching the back surface of the sheet-shaped substrate is inserted on the dotted line. By changing the height, it is possible to make adjustments that prevent "easiness of cutting" and facilitate folding. In general, the length of the cut is 3 for the length of the cut.
A length of ~ 7 times is preferred. Reference numeral 9 is a roll, and 18 is a perforated cutter in which a knife portion of a circular rotary cutter is shaved discontinuously to provide a portion that does not completely and continuously penetrate the sheet-shaped substrate, and the sheet-shaped substrate 1 to be fed is rolled. 9 and perforation cutter 18 are used for pressing. Further, when the folding line method is perforated, the perforation method is not adopted for the folding line portion in contact with the resin composition so that the resin composition injected into the groove-shaped molded article does not leak from the perforation, Alternatively, the object can be achieved by making a small cut in which the resin composition does not leak. Further, as another method, the purpose can be achieved also by making a "cut that does not penetrate" called a half cut that does not reach the back surface of the sheet-shaped substrate. This "break that does not penetrate" may be continuous or discontinuous. It is also possible to use a perforation-shaped fold line and a crease-shaped fold line together, and these fold lines may be used in advance before molding a sheet composed of a plurality of groove-shaped molded bodies, or
Alternatively, there is a method performed during the manufacturing process, but in the process of manufacturing a sheet composed of a plurality of groove-shaped molded products in that the precise dimensions of each groove-shaped molded product of a sheet composed of a plurality of groove-shaped molded products to be formed are obtained. It is preferable to carry out.

In the first step of the present invention, the continuously feeding sheet-shaped base material is aligned with a plurality of radial forming guides that converge in a plurality of advancing directions, and the sheet-shaped base material on the radial forming guide is almost always radially formed. It moves on the forming guide, and at the same time, it advances while making the sheet-shaped base material between the adjacent radial forming guides and the radial forming guide into a groove shape, and is bent three-dimensionally to be composed of a plurality of groove forming bodies. As we make sheets, this radial forming guide can be a fixed object, a moving object, a long continuous object, or a discontinuous object installed with a gap. good. FIG. 4 is a perspective view showing a part of the example. Specifically, even if the belt is traveling, it is not limited to the triangular long pipe 36 or the rectangular long square pipes 32 and 33 shown in FIG. 4, the circular long fixed metal wire 34, or the T-shaped stand 35. Alternatively, it may be a radial forming guide in which short square pipes or short circular pipes are lined up with radial gaps. It is also possible to install only one short pipe as a radial forming guide and to act as a radial forming guide between it and a parallel guide installed in the rear with a gap. That is, the radial forming guide of the present invention may be any one as long as it functions to radially condense the sheet-shaped substrate. Further, it may be one in which rotating bodies such as a disk, a gear, and a blade are arranged in a radial pattern, and any point may be used as long as it regulates in a radial pattern. The radial forming guide of the present invention is a continuous or discontinuous structure linearly arranged radially so as to converge in the traveling direction, and all the adjacent radial forming guides have a width as they advance. It is set to be narrow. Aligning with the radial forming guide means, for example, when the sheet-shaped base material travels on the radial forming guide, the points of the sheet-shaped base material on the radial forming guide almost always move on the radial forming guide. Means to astringent. In addition, when the sheet-shaped substrate runs under the radial forming guide, it means that the point of the sheet-shaped substrate under the radial forming guide almost always moves under the radial forming guide and converges. .

In the first step of forming a sheet consisting of a plurality of groove-shaped compacts by aligning the radial base with the radial compaction guide of the present invention, the sheet-shaped substrate to be fed out has the radial compaction guide horizontal. In this case, it travels on the upper surface or the lower surface of the radial forming guide, or when the radial forming guide is vertical, it advances while contacting the side surface of the guide. At this time, the sheet-shaped base material is advanced between the radial forming guides so as to form a groove shape through the radial forming guides. That is, for example, when the sheet-shaped base material travels on a horizontal radial forming guide, the flat sheet-like base material has a V-shaped groove shape on the lower side between the adjacent radial forming guides. In this way, a sheet composed of a plurality of groove-shaped compacts is formed. According to the present invention, in the first step, the sheet-shaped base material between the adjacent radial forming guides is pressed into a groove shape via the radial forming guides, or is not pressed. Press the adjacent parallel guides so as to form a groove shape between the parallel guides, or press between the adjacent radial and parallel guides so that both of the above steps become groove shapes. The purpose can be achieved. FIG. 5 is a perspective view showing an example of a jig pressed by radial guides and / or parallel guides. Specifically, a pressing method using a pressing tool 40 or the like having a pestle-like tip with a hemispherical shape, a method of installing the rectangular pipes 42 and 45 and the like substantially along the guide and pressing, and other pressing jigs 41 and 43 , 44, 4
6, 47, 48 or a method of sucking between the radial forming guides using the slit-shaped openings to thereby press from the back surface side between the radial forming guides, and the wind pressure Although there is a method of pressing, the pressing device is preferably set so that the groove formed always becomes deeper as the sheet-shaped substrate advances. FIG. 6 is a sectional view showing the relationship between the radial forming guide and the pressing jig. 1 is a sheet-like base material 34,3
5, 32 are radial forming guides, 46, 42, 40, 44
Is a pressing jig. Regarding the pressing jig, it may be basically the same shape as the radial forming guide that is inserted between the radial forming guides and the radial forming guides that are adjacent to each other, but usually it is between the rotating pulley, the guide and the guide. Fixed circular pipes that mesh with each other, fixed angle pipes with the same size in vertical, horizontal and height are used. These steps may be performed by any method, but the pressing is performed at the same time as the sheet-shaped substrate advances. In these pressing methods, it is preferable to reduce the running resistance of the sheet-shaped substrate by baking Teflon or the like on the rotating body or the pipe, if necessary. The radial forming guide of the present invention is a symmetrical fan shape that normally converges as it advances, but a half fan shape that converges from only one side, which is a fan shape divided into two in the traveling direction, is also used. It is possible and within the scope of the invention.

According to the present invention, the sheet-like base material is bent along the radial forming guide to be bent to form a sheet comprising a plurality of groove-like formed bodies. Therefore, one sheet-like base material to be fed out does not fit in a fan shape. To go. It is preferable to provide a deformable space immediately before the radial forming guide, that is, between the sheet-shaped base material and the radial forming guide. This space allows the radial forming guide to absorb "wrinkles" and "strains" generated at the start of bending. This is the dimension resulting from the difference in length between the center of the sheet-shaped substrate being formed, which results from the sheet-shaped substrate converging in the radial forming guide, and the end of the diagonal side surface of the sheet-shaped substrate being formed. The difference can be absorbed by this space. In this case, since the length of the central portion of the sheet-shaped substrate being formed is shorter than the length of the oblique side surface end portion of the sheet-shaped substrate being formed, the central portion of the substrate is lengthwise. There is too much play. The space may be completely free and deformed without applying any force, but it may be deformed in one direction by applying a partial force from the upper surface side or the lower surface side. As a method of applying this force, a method of applying a force to the central portion of the upper surface of the sheet-shaped substrate with a roll, a method of pressing the central portion of the upper surface with wind pressure or a method of sucking from the central portion of the upper surface or the central portion of the lower surface, a curved roll or A drum roll or the like may be used, but a curved roll or a drum roll is preferably used. The length of the space in the traveling direction varies depending on the groove shape or the number, but is preferably about 5 to 100 cm.

In the first step of the present invention, the resin composition may be injected into the plurality of groove-shaped molded bodies formed so as to be radially converged as the second step. In some cases, the resin composition is injected after the groove-shaped molded body is made to move parallel to the direction in which the groove-shaped molded body moves to form a groove-shaped structure parallel to the moving direction of the sheet-shaped substrate. In the latter case, it is preferable to provide a plurality of parallel guides or the like so that the sheet made of the groove-shaped molded body advances in parallel. Specifically, it is preferable to install parallel guides such as belts, rolls, plates and squares so that the grooves travel in parallel, but the point is to use multiple parallel guides that allow the sheet-shaped base material to run in parallel. It may be.

When the radial forming guide and the parallel guide are used in the first step, both may be continuous, but it is also preferable to provide a deformable space between the radial forming guide and the parallel guide. preferable. By providing this space, the sheet-like base material that is trying to converge in a fan shape moves in parallel. Can be absorbed. The length of this space varies depending on the number, size, depth, etc. of the sheets formed of a plurality of groove-shaped molded bodies, but is generally about 5 to 100 cm.

In the present invention, a resin composition having fluidity is continuously injected and cured while molding a sheet composed of a plurality of groove-shaped moldings manufactured continuously or after molding. When the fluid resin composition that can be used in the present invention is polyurethane, it need not be a special raw material. Any polyol can be used as long as it is used for a general polyurethane foam. For example, any polyol such as polyoxyalkylene polyether polyol, polyester polyol, and polyolefin polyol can be used. The polyisocyanate may be any polyisocyanate that can be used in urethane foam, such as commonly used tolylene diisocyanate, hexamethylene diisocyanate, polymethylene polyphenylene polyisocyanate, and crude polymethylene polyphenylene polyisocyanate. Examples of the cross-linking agent or chain extender include low molecular weight polyols such as 1,4 butanediol, trimethylolpropane, 1,3 butanediol, ethylene glycol and diethylene glycol, and commonly used polyamines such as methylenebisdiphenylpolyamine and tolylenediamine. Can also be used. As the catalyst, any commonly used catalyst such as a tertiary amine or an organic metal compound can be used. Further, in the present invention, the one-shot method and the prepolymer method in which the polyol and the polyisocyanate are previously reacted are also applicable to the present invention. Further, both a soft urethane molded body and a hard urethane molded body are possible and are included in the scope of the present invention. As the filler, inorganic fillers such as calcium carbonate, clay, barium sulfate, barium hydroxide, aluminum hydroxide and the like, dioctyl phthalate, petroleum resin, asphalt, polybutene and the like commonly used can be used.

[0025]

According to the present invention, basically, a sheet-shaped base material wound in a roll shape is unrolled, and one sheet-shaped base material is advanced along a radial forming guide consisting of a plurality of guides, and at the same time, the main radial forming is performed. The sheet base material is pressed between the guides and the radial forming guides, or the parallel guides are pressed, or both guides are pressed between the adjacent guides to form a sheet composed of a plurality of grooved formed bodies. It is formed continuously. Specifically, an interval required to make each groove-shaped molded article targeted by the present invention, for example, a distance from the folding line 11 to the folding line 12 to the folding line 13 in FIG. In (b), the distance from folding lines 20 to 21, 22 to 23, in (c) from folding lines 25 to 26 to 27, and in (d), the folding lines 29 to 30. Set the interval between the guide and the radial forming guide to be the interval at the start of the radial forming guide.
However, in FIG. 1, (b) 23 to 24, (c) 27 to 2
8 and (d), 30 to 31 are widths of the radial forming guide. Then, the groove is deepened while pressing between the radial forming guide and the adjacent radial forming guide,
The width of the sheet-shaped substrate becomes narrower along the radial forming guide. Therefore, in the present invention, the points of the sheet-shaped substrate on the radial forming guide almost always move on the radial forming guide and draw a locus of convergence. Here, when we draw a trajectory that moves on the radial forming guide and converges almost all the time, it is expressed that there is a slack in the center part of the sheet-shaped substrate at the start of the radial forming guide, so it deviates slightly from the guide. There is also. However, the points on the guide will follow the trajectory on the guide as they converge along the radial forming guide. The points of the sheet-shaped base materials on the adjacent radial forming guides gradually come closer to each other as they move, and the grooves become deeper by the amount of the approach, thereby making the sheet-shaped base material into a plurality of groove shapes.
This action also works when using a full radial forming guide
Divided into two parallel to the direction of travel of the radial forming guide 1/2
The same applies to the radial forming guide having a shape.

Next, a specific example will be described. FIG. 7 is a plan view of an apparatus for producing a sheet having a plurality of groove-shaped molded bodies of the present invention. The releasable kraft paper, which is the sheet-shaped base material 1, is fed out through the roll 10, and at this time, perforations are attached to the kraft paper as fold lines 14 by using a perforation cutter 18. The releasable kraft paper which is the sheet-shaped base material 1 has radial forming guides 51, 52, 53,
Proceed on the upper surface of 54, 55, 56 (rear surface). Here, since the primary pressing jig, specifically 61, 62, 63, 64, 65 applies pressure between the radial guides downward from the upper surface of the kraft paper having releasability, Kraft paper has radial forming guides 51, 52, 53, 54, 5
The kraft paper between the radial forming guides is pushed downward as it progresses along 5, 56, forming deep grooves. When the primary pressing jigs 61, 62, 63, 64, 65 are being operated, the radial forming guides 51, 52, 5
3, 54, 55 and 56 are in a state of pressing the sheet-shaped substrate 1 in the opposite direction.

Secondary pressing jigs 71, 72, 73, 74,
The groove 75 is deeper than the pressing jigs 61, 62, 63, 64 and 65. The point C of the sheet-shaped substrate 1 on the radial forming guide 51 and the point D of the sheet-shaped substrate 1 on the radial forming guide 52 are the radial forming guides 51 and 52, respectively.
The distance between C and D becomes gradually shorter as it progresses up to C ′ and D ′ points, and becomes the distance between C′D ′. As the distance becomes shorter, the groove of the pressing jig 71 becomes deeper than 61, and a groove-shaped molded body is formed. Here, points C and D on the radial forming guide travel to reach C ′ and D ′, but the loci of these points almost always travel on the radial forming guide. The number of pressing jigs installed may be appropriately increased or decreased as necessary, but normally, it may be about two places as in the present invention, but may be three or four places. Further, the sheet-shaped substrate on which the groove-shaped molded body is formed advances along the radial molding guide and is converged, but the next parallel guide, specifically, the primary parallel guides 81, 82, 83, 84, 85. , 86 (back side) and parallelized. These primary parallel guides 81 and 82,
There are parallel pressing jigs, specifically, tertiary pressing jigs 91, 92, 93, 94 and 95 between 83, 84, 85 and 86, and the grooves are pressed by the parallel pressing jigs. The shaped sheet 17 is obtained. In this example, the primary pressing jig,
When pressing with all of the secondary pressing jig and the tertiary pressing jig, but pressing with the secondary pressing jig and the tertiary pressing jig without using the primary pressing jig Alternatively, when pressing only the tertiary pressing jig without using the primary pressing jig and the secondary pressing jig, only the secondary pressing jig does not use the tertiary pressing jig. The present invention can be performed even when pressing. Further, the molding with the radial molding guide can be performed not only once but also twice.

In this apparatus, the radial forming guides 51, 5
A deformable space portion 19 of the kraft paper, which is the sheet-shaped base material 1, is provided between the feeding rolls 10 and 2, 53, 54, 55, 56. This is the secondary pressing jigs 71, 72 for converging the radial forming guide from the feeding roll 10 at the stage where the kraft paper forms the grooved forming body.
The distance between the central portion and the side portion of the kraft paper up to 73, 74, and 75 is different, and functions to absorb the excess of the sheet-shaped base material due to the short central portion. In addition, a free space portion pressing roll 16 is installed in the center of the main space portion from the upper surface to push an extra sheet-shaped base material downward. This is for stabilizing the product size by stabilizing the sheet-shaped base material 1 of the main space portion 19 on either side. Further, the space 15 between the radial forming guide and the parallel guide also acts to absorb the strain for making the radially converged groove-like formed bodies parallel. FIG. 9 is a sectional view taken along the line AA ′,
FIG. 10 is a sectional view taken along line BB '. Normally, the radial forming guides are lined up with radial converging guides on the same plane, but even a radial forming guide with a saddle-shaped curved surface in which the center of the radial forming guide on the unwinding side is raised good.

FIG. 8 illustrates a method of continuously injecting the resin composition into the sheet formed of the groove-shaped molded body manufactured in FIG. 7 and curing it to simultaneously manufacture a plurality of cord-shaped molded bodies. . In this example, the groove width of the grooved molded body manufactured in FIG. 7 is narrowed while further advancing, and the resin is injected into each grooved molded body from each discharge port 101, 102, 103, 104, 105 of the resin composition injection device 100. The composition is dropped and poured. 111,1
The resin composition is injected into a sheet formed of a groove-shaped molded body having undergone 12, 113, 114, 115, 116, and the groove-shaped upper surface closing guides 121, 122, 123, 124, 12
5,126, the resin composition injection port of the sheet composed of the groove-shaped molded product is closed. Next, while being heated while passing through the groove-shaped object cure guides 131, 132, 133, 134, 135, 136, it is molded into a circular shape to form a circular resin molded product. 141, 142, 143, 144, 14
Reference numeral 5 is each closing part. 11 is a GG 'sectional view, and FIG. 12 is a HH' sectional view. If an elliptical cord-shaped resin molded body is desired, the groove-shaped molded body may be molded by passing through a circular or elliptical mold before curing. This mold can achieve the purpose before curing, even if it is used on the entire surface or partially. Further, after the product is cured in the release paper, the widthwise ends of the grooved shaped body sheet are expanded to close the closed portions 141, 142, 143.
The parts 144, 145 are released from the mold, and the parts 141, 151
In 151 ', 142 parts are opened to 152, 152', etc. Further, the product can be released from the mold by further expanding both ends of the sheet made of the groove-shaped molded body. Reference numeral 4 is a release paper that is peeled off after the string-shaped resin molded body is manufactured.

In the present invention, while manufacturing a plurality of groove-shaped molded bodies,
Alternatively, it is formed by injecting a resin composition having fluidity after manufacturing. Generally, in order to manufacture a large number of string-shaped resin moldings simultaneously and continuously by existing technology, a resin composition is injected into a plurality of molds. It is impossible to continuously manufacture. The present invention can continuously manufacture a large number of string-shaped resin molded products at the same time without using an expensive mold or the like. In the present invention, the resin composition is injected into the groove-shaped molded body, and the injected resin composition is cured by self-reaction and / or heating. At this time, the resin composition fills the closed groove-shaped molded body with guides on both ends of the upper surface of the groove-shaped molded body, the groove-shaped molded body is in a circular state, and the excess resin composition is further closed in the groove-shaped molded body. A circular cord-shaped resin molded body having a constant diameter is formed by escaping from the gap to the outside. The cord-shaped resin molded body of the present invention is effective as a cord-shaped rubber substitute, a metal spring substitute, a metal pipe substitute, a metal roll substitute, and the like.

[0031]

Example 1 As a first step, a sheet consisting of a plurality of groove-shaped molded articles was manufactured using the apparatus shown in FIG. 7, and then, as a second step, a polyurethane composition was injected using the apparatus shown in FIG. A string-shaped resin molded body was manufactured. The equipment specifications up to the production of the grooved molded sheet are as follows. 1. Feeding roll 10 width: 1000 mm 2. Release paper width: 700 mm 3. Each radial forming guide (51, 52, 53, 54, 5
5,56): width 25 mm, height 50 mm, length 3000
mm 4. The pay-out roll 10 and the radial forming guide (51, 5
2, 53, 54, 55, 56) space portion 19: about 35
0 mm 5. First radial forming guide (51, 52, 53, 54,
55, 56) and the primary parallel guides (81, 82, 83,
84, 85, 86) and space 15: about 300 mm 6. Primary parallel guide (81, 82, 83, 84, 8
5,86): width 25 mm, height 50 mm, length 660 m
m 7. 7. Distance between points C and D on adjacent first radial forming guides (51, 52): 70 mm 8. Distance between points C'and D'on adjacent first radial forming guides (51, 52): 25 mm E on the adjacent primary parallel guides (81, 82)
Distance between point and point F: 25 mm 10. 10. Distance between points E ′ and F ′ on adjacent primary parallel guides (81, 82): 25 mm 11. Opening angle of the first radial forming guide: about 2.15 degrees 12. Primary pressing jig: 40 mm x 40 mm x 160 m
Aluminum square bar, surface Teflon tape sticking treatment 13. Secondary pressing jig: 28 mm x 28 mm x 160 m
Aluminum square bar, surface Teflon tape sticking treatment 14. Third pressing jig: 20mm × 20mm × 500m
m aluminum square bar, surface Teflon tape pasting treatment Polypropylene film laminated paper with a width of 700 mm and a basis weight of 65 g / m ² baked as a releasable sheet-like base material is fed out at a speed of 3 m / min. It was paid out through 10 onto a radial forming guide. When the release paper passes through the radial forming guides, the primary pressing jig 6 is placed at an intermediate position between the adjacent radial forming guides.
It is pushed downward by 1, 62 and the like, and further deeper by the secondary pressing jigs 71, 72 and the like, and approaches the target groove-shaped molded body sheet. At this time, the pay-out roll 10 and the radial forming guide (51, 52, 5
(3, 54, 55, 56), approximately in the center of the space between them, the excess paper is lightly pressed from the lower surface using the free space press roller 16. This release paper moves to a parallel guide for final forming and parallelization, and the third pressing jig 91,
The groove-shaped molded body sheet 17 is formed by pressing at 92 or the like. Next, the groove width is further reduced by proceeding to the apparatus shown in FIG. When the width was 9 mm and the depth was about 30 mm, the defoamed polyurethane composition obtained by the following compounding method was simultaneously and continuously injected using a small casting machine. The groove shape of each of the groove-shaped moldings injected with the polyurethane composition was further narrowed by passing through the secondary radioactive guide, and an elliptical cord-shaped polyurethane molding was obtained. Polyurethane composition (1) Piperen QP-203 (manufactured by Mitsui Chemicals, Inc.): 10
0 parts by weight (2) curing agent QH-7002 (manufactured by Mitsui Chemicals, Inc.): 100
Parts by weight (3) stanna octoate: 0.20 parts by weight In the step of curing and molding the cord-shaped polyurethane molded body, the release paper is heated to about 47 ° C and about 75 ° C after injection of the polyurethane composition. To about 1 after the reaction is complete.
It was cured by heating to 30 ° C. The obtained string-shaped polyurethane molded product had a tensile strength of 14700 kpa and an elongation of 550%.

[0032]

Example 2 Using the apparatus of Example 1, a cord-shaped soft polyvinyl chloride molded body was manufactured. As the sheet-like base material having releasability, a release paper having a basis weight of 85 g / m ² was used which was subjected to a clay surface treatment and then directly baked with a silicone release agent. This release paper was run at a speed of 1 m / min to prepare a grooved molded sheet 17 using the device shown in FIG. This groove-shaped molded product sheet is moved to FIG. 8 in the same manner as in Example 1, and the polyvinyl chloride composition shown below is mixed in a high-speed mixer and then poured into the groove-shaped molded product. The groove-formed body sheet thus injected was heated to about 145 ° C., further heated to about 190 ° C. to be sufficiently plasticized and then cooled, and then demolded to obtain the target product. Polyvinyl chloride composition Paste type polyvinyl chloride: 100 parts by weight Dioctyl phthalate: 100 parts by weight Calcium carbonate: 10 parts by weight Zinc stearate: 2 parts by weight

[0033]

EFFECTS OF THE INVENTION The present invention is one in which a plurality of cord-shaped resin moldings are continuously manufactured simultaneously by using one sheet-shaped base material. According to the present manufacturing apparatus and manufacturing method, it was possible to manufacture only one or two cord-shaped resin molded bodies, which were conventionally capable of manufacturing only short products using a mold, or the extrusion method. Not only can a continuous product of several to ten or more long products be produced in place of a product such as rubber, but also a composite product with a sheet-shaped substrate can be produced at the same time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a sheet made of a groove-shaped molded body which is molded in a step of manufacturing a string-shaped resin molded body of the present invention

FIG. 2 is a sectional view of a folding line attaching machine used in the present invention.

FIG. 3 is a cross-sectional view of a perforation line folding machine used in the present invention.

FIG. 4 is a perspective view of a radial forming guide used in the present invention.

FIG. 5 is a perspective view of a pressing jig for pressing between the radial forming guides used in the present invention.

FIG. 6 is a cross-sectional view showing the relationship between a radial forming guide used in the present invention and a pressing jig.

FIG. 7 is a plan view showing a step of producing a sheet composed of a groove-shaped formed article, which is the first step of the present invention.

FIG. 8 is a plan view showing a step of injecting the resin composition into the groove-shaped molded article, which is the second step of the present invention, and causes foaming and curing.

9 is a sectional view taken along the line A-A ′ in the first step of FIG. 7.

FIG. 10 is a sectional view taken along the line B-B ′ in the first step of FIG. 7.

FIG. 11 is a sectional view taken along the line C-C ′ in the second step of FIG. 8.

FIG. 12 is a sectional view taken along the line H-H ′ in the second step of FIG.

FIG. 13 is a plan view for defining the opening angle of the radial forming guide of the present invention.

[Explanation of symbols]

1: Sheet-shaped base materials 11, 12, 13, 20, 21, 22, 23, 24, 2
5, 26, 27, 28, 29 30, 31: Folding line of sheet-shaped substrate 2: Resin composition 3: String-shaped resin molded body 4: Peeling release paper 5 after production of string-shaped resin molded body 5: Male Stitching roll 6 having protrusions: Male protrusion 7: Steeping roll 8 having female grooves: Female groove 9: Roll 10: Feeding roll 14: Folding line 15 of perforations on kraft paper: Free space portion 16 after radial guide : Free space portion pressing roll 17: Groove shaped sheet 18: Perforated cutter 19: Free space portion 32 in front of radial forming guide: Radial forming guide 33: Another radial forming guide 34: Another radial forming guide 35 : Another radial forming guide 36: Another radial forming guide 40: Pressing jigs 41, 42, 43, 44, 45, 46, 47, 48: Other pressing jigs 51, 52, 53, 5 4, 55, 56: radial forming guides 61, 62, 63, 64, 65 ,: primary pressing jigs 71, 72, 73, 74, 75: secondary pressing jigs 81, 82, 83, 84, 85, 86: Primary parallel guides 91, 92, 93, 94, 95: Third pressing jig 100: Resin composition injection jig 101, 102.103, 104, 105: Resin composition injection port 111, 112, 113, 114, 115, 116: Secondary parallel guides 121, 122, 123, 124, 125, 126: Upper surface closing guides 131, 132, 133, 134, 135, 136: Groove curing. Guides 141, 142, 143, 144, 145: Groove-like object closing parts 151, 151 ', 152, 152', 153, 15
3 ', 154, 154', 155, 155 ': Release line for release paper

Claims (6)

[Claims] 1. A method for producing a plurality of string-shaped resin molded articles using a sheet-shaped base material which is continuously fed out, wherein the sheet-shaped base material is continuously fed out as a first step, and
The fed sheet-shaped base material is aligned with a plurality of radial molding guides that converge in the traveling direction, and the sheet-shaped base material on the radial molding guide almost always advances on the radial molding guide, and at the same time, the adjacent radial molding guides. The sheet-shaped base material between the radial forming guide and the radial forming guide is three-dimensionally bent through the radial forming guide to form a sheet composed of a plurality of groove-like formed bodies, or after forming, a second step is continuously performed. A method for simultaneously producing a plurality of cord-shaped resin molded bodies, which comprises injecting a resin composition into a plurality of main groove-shaped molded bodies and molding them. 2. The plurality of moldings according to claim 1, wherein in the second step, after the resin composition is injected into the grooved molded body, the grooved molded body is completely or incompletely closed and molded. A method for simultaneously producing a string-shaped resin molded body. 3. The resin molding having a desired shape is obtained by injecting a resin composition into the grooved molded body in the second step, and then applying external pressure to the grooved molded body from the outside. A method for simultaneously producing a plurality of cord-shaped resin molded articles as described. 4. The method for simultaneously producing a plurality of string-shaped resin moldings according to claim 1, wherein the resin composition is a reactive polyurethane resin composition or a reactive silicone resin. 5. A resin molding produced by the method according to claim 1. 6. An apparatus for producing a plurality of cord-shaped resin molded articles using a sheet-shaped base material which is continuously fed out, wherein the sheet-shaped base material is continuously fed out as a first step, and
The fed sheet-shaped base material is aligned with a plurality of radial molding guides that converge in the traveling direction, and the sheet-shaped base material on the radial molding guide almost always advances on the radial molding guide, and at the same time, the adjacent radial molding guides. After the sheet-shaped base material between the radial forming guide and the radial forming guide is three-dimensionally bent to form a sheet composed of a plurality of groove-like formed bodies, a plurality of main groove-like formed bodies are formed as a second step. An apparatus for simultaneously producing a plurality of string-shaped resin molded bodies, which has a step of continuously injecting a resin composition into a resin and molding the resin composition.