JP2003011134A - Foamed urethane roll manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance manufacturing efficiency and safety of work by minimizing a worker interposing process by systematizing a manufacturing process and well forming a urethane raw material into sponge in a proper state by improving the manufacturing process. SOLUTION: The foamed urethane roll manufacturing apparatus 10 is fundamentally constituted of a plurality of roll molding molds 12, a mold feed mechanism 14 having a plurality of the molds 12 arranged thereto at a required interval, a raw material injection mechanism 16 provided at a constant position approaching the go-around route of the roll molding molds 12, a tape supply mechanism 18 arranged on the just downstream side of the raw material injection mechanism 16, a mold heating means 20 arranged on the downstream side of the raw material injection mechanism 16, a tape peeling mechanism 22 provided on the downstream side of the tape supply mechanism 18 and a roll demolding station 24 arranged on the downstream side of the tape peeling mechanism 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus for urethane foam rolls, and more particularly to a manufacturing apparatus for molding a urethane raw material produced by mechanical floss (mechanical agitation) into a roll shape.

[0002]

2. Description of the Related Art In copying machines, fax machines, and other office equipment, constituent members such as transfer rollers and electrostatic rollers are provided. This roller is obtained by forming a high-performance urethane having a so-called microcell structure into a roll shape having a required length, and coaxially inserting and arranging a shaft body as a rotation support member into the roll body. When molding a roll body, generally, a so-called mechanical floss that is produced by mixing an inert foaming gas such as nitrogen without adding water or foaming material to the raw material to produce a desired foam body (Mechanical stirring) is preferably adopted. The foam obtained by adopting this mechanical floss has a uniform size distribution of the bubbles contained therein, and
There is an advantage that the shape anisotropy is small. Therefore, when the foamed body is formed into a roll and the shaft is inserted into the foamed body to form a roller, the pressing force of the peripheral surface that comes into contact with the transported object becomes constant, so that the thin transported object ( In this case, it is possible to make it suitable for surely feeding the printing paper.

However, when molding a foam by the mechanical floss, the urethane raw material obtained by mixing the foaming gas and the raw material is placed in a molding die having a cavity formed into the shape of the product to be obtained. inject. As shown in FIG. 17, the molding die 216 in this case has a pair of mold halves 222 in which cavity halves 220 defining a plurality of independent cavities 218 are recessed in parallel on the contact surface.
Is rotatably supported by a plurality of molding dies 2
16 are arranged in parallel along the transport line.
A hole 224 for injecting the urethane raw material is opened at a predetermined position of the molding die 216 so as to spatially communicate with the cavity 218. Furthermore, each cavity half 2
A groove 226 having a semicircular cross section is formed on the part 20 from a position serving as both end parts of a roll body which is a molded product to each end part of the mold half body 222. When opened, the core 228 is mounted through the groove 226.

When molding the foam, one mold half 222 of the mold 216 is rotated at a predetermined position of the transfer line to open the cavity half 220. In this state, the cores 228 are attached to the respective cavity halves 220 of the one mold half 222 through the grooves 226. The core 228 itself is set to have an outer diameter dimension that is the same as the diameter of the shaft that is concentrically inserted through the roll body that is a molded product, and that is sufficiently longer than the formation length of the roll body. When it is mounted in the groove 226, a sufficient molding space is defined between the inner surface of the cavity half body 220 and the inner surface thereof. Then, the molding die 216 to which the core 228 is attached is closed by rotating one of the mold halves 222, and is moved, for example, one block downstream along the transfer line. As a result, another molding die 216 that has been positioned on the upstream side until then is conveyed to the downstream side, and when it reaches the open position, one of the mold halves 222, like the preceding molding die 216, Open each cavity 2
The cores 228 are attached to the 18's, respectively. Then, by repeating this procedure, the molding die 216 is sequentially transferred to the downstream side along the transfer line.

The molding die 216 that has been conveyed downstream from the position where the core 228 is mounted has the holes while the core 228 is mounted to the molding die 216 located upstream of the molding die 216. The urethane raw material is injected via 224.
Then, the molding die 216 into which the raw material is injected is heated in the heating furnace 230 arranged on the downstream side of the transfer line. As shown in FIG. 18, this heating furnace 230 is a tunnel of a required length arranged along the transfer line, and is controlled so that the heating temperature inside thereof is maintained at around 150 degrees. And the mold 216 into which the urethane raw material is injected is
It is heated inside the heating furnace 230. As a result, the raw material reacts in the cavity 218 and is formed into a predetermined roll shape. After the curing is completed, the mold half 222 of the molding die 216 transferred to the downstream side is opened, both ends of the core 228 are separated from the groove, and the urethane foam roll 229, which is a molded product, is inserted into the cavity half. 220
And the core 228 is pulled out from the urethane foam roll 229 to obtain a molded product.

[0006]

As described above, according to the process for producing the urethane foam roll 229, the urethane foam raw material roll 229 is obtained by curing the urethane raw material inside the cavity 218. . However, in the manufacturing process, in reality, there are many places that depend on the manual work of the worker. That is, the urethane raw material is injected into the molding die 216 equipped with the core 228 with the operator aligning the injection hole such as an injection hose with the hole 224, and after the injection is completed, the urethane material is injected into the hole 224 by the plug member. Is blocked. At the end of the manufacturing process, the operator detaches the foamed molded product in which the core 228 is concentrically arranged from the cavity half 220 while the operator grips the core 228 at a predetermined position with a finger or the like. After that, the worker pulls out the core 228 from the urethane foam roll 229. Since the complicated work described above is required, there is a drawback that the efficiency is lowered. Further, a molding die 216 in which the raw material is injected
Is heated to a predetermined temperature by means such as the heating furnace 230 as described above. With respect to this point, when the urethane raw material is cured, it is preferable to heat the raw material at an optimum temperature corresponding to the type of the raw material and a predetermined portion in the cavity 218.
It is not possible to carry out fine temperature control to adapt to this. Since the forming die 216 after passing through the heating furnace 230 has reached a temperature of about 150 degrees as described above, it is not uncommon for an operator to directly work on it with fingers. Also, the core 228 heated together with the molding die 216
Together with the urethane foam roll 229 and the cavity 218.
After being removed from the urethane foam roll 229, the urethane foam roll 229 is taken out from the urethane foam roll 229 and then temporarily accumulated at a predetermined place. In this case, the core 228 comes into contact with the outside air before it is mounted on the molding die 216 again, so that the temperature of the core 228 decreases. Mold 2
Similarly, the temperature of 16 also drops after passing through the heating furnace 230, but since the volume of the core 16 is larger than that of the core 228, the temperature of the core 16 drops more slowly than the core 228. Therefore, the longer the time (so-called tact time) until the core 228 is reattached to the molding die 216, the wider the temperature difference between both members, and the more the core 228 is heated to a predetermined temperature. Since energy loss also occurs, there are various drawbacks that the curing of the urethane raw material injected into the cavity 218 in the subsequent process is adversely affected to some extent.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems inherent in the above-mentioned prior art, and it is a process for systematizing the manufacturing process to intervene an operator. The manufacturing equipment of the urethane foam roll that improves the production efficiency and the safety of work by minimizing the amount, and improves the production process so that the urethane raw material can be sponged well in an appropriate state. The purpose is to provide.

[0008]

[Means for Solving the Problems]
In order to preferably achieve the intended purpose, an apparatus for manufacturing a urethane foam roll according to the present invention comprises two mold halves that can be opened and closed, and a cavity for molding a urethane foam roll inside each mold half. And a roll molding die in which one of the mold halves has an injection hole for allowing the injection of the urethane raw material into the cylindrical cavity defined when the mold is clamped, and the roll molding die has a required space. A plurality of molds are provided, which are intermittently fed at required intervals, and which are provided at a fixed position close to the orbital path of the roll forming die, and a fixed position, which is provided at a fixed position. A raw material injection nozzle that can come in and out of contact with the stopped molding die and can reciprocate a required distance along the circulation path is provided, and the injection nozzle is brought into contact with the injection hole of the stopped molding die. The urethane raw material A raw material injecting mechanism for injecting into the cavity, and a reciprocating movement of a required distance along the circulation path of the roll forming die, which is arranged immediately downstream of the raw material injecting mechanism, can be performed in the injection hole of the forming die. A tape supply mechanism for feeding and supplying a long tape that is forcibly abutted to prevent the urethane raw material from flowing out from the injection hole; and a tape supply mechanism downstream of the raw material injection mechanism and along the circulation path of the roll forming die. The required number of mold halves are arranged by holding the required number of molds, which are arranged in a required number at intervals corresponding to the arrangement interval of the molds, and which come and stop intermittently for the stop time. A die heating means for heating to a temperature and a long length provided at a fixed position on the downstream side of the tape supply mechanism and close to the circulation path of the roll forming die and abutting on the injection hole of the forming die. The tape that separates the tape from the injection hole A peeling mechanism and a rod-shaped urethane foam roll which is provided at a fixed position on the downstream side of the tape peeling mechanism and close to the circulation path of the roll molding die, and the molding die is opened to mold the cylindrical cavity. And a roll demolding station for demolding.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an apparatus for producing a urethane foam roll according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. The same members as those already mentioned in the prior art are designated by the same reference numerals and the description thereof will be omitted.

[0010]

[Regarding the overall structure of the urethane foam roll manufacturing equipment]
An apparatus 10 for manufacturing urethane foam rolls according to an embodiment includes a plurality of roll forming dies 12 as shown in FIGS. 1 to 3.
A mold feed mechanism 14 in which a plurality of the molds 12 are arranged at required intervals, a raw material injection mechanism 16 provided at a fixed position close to the circulation path of the roll forming mold 12, and the raw material injection mechanism 16 Tape supply mechanism 18 arranged immediately downstream of the mold, and mold heating means 20 arranged downstream of the raw material injection mechanism 16.
The tape peeling mechanism 22 is provided downstream of the tape supply mechanism 18, and the roll demolding station 24 is provided downstream of the tape peeling mechanism 22.

[0011]

[About roll forming die] The roll forming die 12
As shown in FIGS. 4 and 5, the mold is composed of two mold halves 26 that can be opened and closed, and a cavity half 28 for urethane foam roll molding is provided inside each of the mold halves to form a mold. A cylindrical cavity 30 is sometimes defined and is arranged on a circular turntable 32 ([0016] to be described later) which constitutes the mold feeding mechanism 14. That is, as shown in FIG. 2, a plurality of brackets 34 are arranged upright on the periphery of the turntable 32 along the circumferential direction at required intervals. An upper end of an L-shaped arm 36 is swingably supported on the upper end of each bracket 34, and the lower end of the L-shaped arm 36 ([0035] described later) extends horizontally. Roll forming die 12 at the open end
Is fixed upright. The rear side of the L-shaped arm 36
On a side (close to the center of the turntable 32), a rod-shaped member 38 having a required length is horizontally arranged.

Further, as shown in FIG. 4, eight cylindrical cavities 30 of the roll forming die 12 are provided in parallel to the roll forming die 12 at required intervals, and are formed into a round bar shape. 40 (to be described later [0015]) is set so that it can be inserted and removed with its axis aligned with the cavity 30. Further, in the roll forming die 12, an injection hole 42 that allows the urethane raw material to be injected into the cylindrical cavity 30 is formed in one mold half 26. That is, as shown in FIG. 5, the injection hole 42 is a portion 44 (hereinafter referred to as a recessed portion) where the lower end of the mold half 26 located outside the turntable 32 is recessed radially inward from the surface side thereof. ), Corresponding to the intermediate position between the adjacent cavities 30. The urethane raw material referred to here is the cylindrical cavity 3 of the roll forming die 12.
Immediately before being injected at 0, as described in the prior art, it is obtained by a mechanical floss method in which a gas (foaming gas) such as an inert gas is mixed with a foam raw material and mechanically stirred. .

Further, the injection holes 42 and the cavity half body 28 are provided with grooves 46, 46 extending upward and leftward from the injection holes 42.
Is communicated with. Therefore, since eight cavity halves 28 are formed in the mold half 26, the injection holes 42 are formed at four positions with respect to the recessed portion 44. When the urethane raw material is injected into the injection hole 42, the urethane material is dispersed and supplied to the left and right cylindrical cavities 30 through the groove 46. Further, as shown in FIG. 4, a support hole 31 is provided at the lower end of each cavity half 28.
Is formed, and is configured so that the lower end of the core 40 ([0015] described later) is engaged. Further, the recessed portion 44
The outer surface of is curved and formed so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32. Note that the number of cavity halves 26 is not limited to eight, and it is needless to say that the number of cavities half may be 6, 4, or 10 or more. In addition, as shown in FIGS. 1 and 10, a connecting member 45 is arranged in a position horizontally aligned with the recessed portion 44 in a space where the roll forming dies 12 are separated from each other. ([0049]), it is designed to work. Further, the recessed portion 44 is not limited to the curved molding, and may be formed linearly along the tangential direction of the table 32, for example.

Further, as shown in FIG. 5, each mold half 26 is formed with a plurality of recesses 48. That is, the recess 48 has a horizontally long rectangular shape and the mold half 2
It is a portion that is recessed from the outer surface of 6 to a shallow bottom, and is formed at three locations along the height direction of the mold half body 26. Further, by forming the concave portion 48 in the vertical direction, the rib 49 is relatively formed along the lateral width direction of the mold half 26. By forming the recesses 48 and the ribs 49 in this manner, the weight of the mold half 26 can be reduced and the durability strength can be improved. Further, the mold half 26 is formed on the heating plate 1 formed in a shape corresponding to each recess 48.
54 (to be described later [0031]) engages and is thereby heated to a predetermined temperature. By forming the recess 48 in this manner, the thermal efficiency of the mold half 26 can be improved. Can also contribute.

The core 40 is, as shown in FIG.
It is a member that is made slightly longer than the cylindrical cavities 30 (cavity half 28), and the comb teeth are formed by the number of the respective cylindrical cavities 30 with respect to the common base 50 located on one end side thereof. Are planted in a shape. Positioning pins 52 are provided at both ends of the common base 50 in parallel with the core 40. The positioning pins 52 are aligned with the reference recesses 54 recessed at the fixed positions of the roll forming die 12. By engaging the lower end of the core 40 with the support hole 31 formed in the lower end of the cavity 30, the respective cores 40 can be concentrically set in the corresponding cylindrical cavities 30. ing. Further, the core 46 is inserted into the cavity 28.
Instead of this, as shown in FIG. 6, a shaft 56 for the roller to be manufactured may be mounted. That is, the roll shaft 56 is a single member formed to have the same diameter as each round bar arranged in the core 40, and extension fixing members 57, 57 are attached to both end portions thereof. In this case, one extension fixing member 57 is attached to the common base 50 in place of the core 40, and the other extension fixing member 57 is attached to the shaft 56 so as to be concentric with the support hole 31. It is configured so that it can be set. In this way, by attaching the extension fixing members 57 and 52 to the both ends of the shaft 56 and using the common base 50 side, the urethane raw material is supplied while the shaft 56 is concentrically set in the cavity 30. The shaft 56 is inserted to obtain a roller member in a product state. After the curing is completed, the common base 50 is moved upward to be separated from the shaft 56, the mold half 26 is opened, and the cavity half 28 is opened.
Take out from. Then, the other extension fixing member 57 is separated from the shaft 56 to obtain a roll body.

[0016]

[Die Feeding Mechanism] The die feeding mechanism 14 in which a plurality of roll forming dies 12 are arranged at required intervals is configured to endlessly circulate a predetermined path by intermittently feeding each required interval. ing. That is, as shown in FIG. 2 and FIG. 3, the mold feeding mechanism 14 is provided with the turntable 32 having a required diameter centered on a pivotal support portion 58 erected on the floor surface, and erected on the floor surface at a required central angle. A plurality of rotation supporting portions 60 that are rotatably supported by the turntable 32.
A plurality of the roll forming dies 12 arranged on the outer periphery of the turntable 32 at required intervals, and the turntable 32.
Is basically configured by an intermittent feeding portion 62 that feeds in one direction by a distance corresponding to the arrangement interval of the roll forming dies 12 and stops. The rotation support unit 60 is the turntable 32.
It is a rotating roller provided at eight positions at equal intervals in a position close to the outer peripheral portion of, and supports the bottom surface of the table 32.

As shown in FIGS. 1 and 7, the intermittent feeding portion 62 is arranged at a fixed position facing the circular path of the turntable 32, and can reciprocate in the tangential direction of the table 32. A first drive source 66 for reciprocally driving the slider 64 in the tangential direction; a moving pin catching tool 68 mounted on the slider 64 and capable of reciprocating in the radial direction of the turntable 32; It comprises a second drive source 70 for reciprocally driving the tool pin catching tool 68 in the radial direction and a pin 72 provided on the turntable 32 so as to correspond to each of the roll forming dies 12.

Of these, the slider 64 has a first length provided along the tangential direction of the turntable 32 in a required length.
It is a rectangular plate member arranged on the support base 74, and is mounted on a pair of rails 76 arranged in parallel on the upper surface of the first support base 74 so as to be movable. On the upper surface of the slider 64, two guide members 78 are arranged in parallel in the vicinity of both ends along the tangential direction of the table 32 and substantially along the radial direction of the turntable 32.
The first drive source 66 for reciprocally driving the slider 64
Is basically composed of a ball screw 80 arranged along the extending direction of the first support base 74 and a motor 82 as a drive source arranged at one end of the ball screw 80. A nut (not shown) is screwed into the ball screw 80, and the slider 64 is arranged on the upper surface of the nut.

Further, the moving pin catching tool 68 is a substantially triangular member disposed at the moving tip of the guide member 78, and extends from the apex thereof along the reciprocating direction of the guide member 78. A groove 68a having a required width is provided as a recess. Further, the moving pin catching tool 68 is provided with the second drive source 70 at a site at the bottom of the triangular shape. Ie the second
The drive source 70 is a so-called double-acting cylinder 84, and the tip end of the rod 86 thereof is connected to the moving pin catching tool 68. Further, the pins 72 are provided at positions corresponding to the roll forming dies 12. The pin 72 is a member whose diameter is set so that the groove 68a formed in the moving pin catching tool 68 can be engaged with the pin 72.
By driving the driving source 70, the moving pin capturing tool 6
8 is configured to move back and forth with respect to the pin 72.

A table lock mechanism 88 is disposed downstream of the intermittent feeding section 62, as shown in FIG. The table lock mechanism 88 is provided in the intermittent feeding portion 62.
In the same manner as the above, the turntable 32 is guided in the radial direction of the turntable 32 via a base 90 arranged at a fixed position facing the circulation path and a guide member 92 arranged on the upper surface of the base 90. Pin catching tool 94 capable of reciprocating while being moved
And a drive source 96 that reciprocally drives the fixing pin capturing tool 94 in the radial direction. Similarly to the above, the fixing pin catching tool 94 is a substantially triangular member disposed at the moving tip of the guide member 92, and has a required width along the reciprocating direction of the guide member 92 from its apex. Groove 94
a is recessed. The drive source 96 is a double-acting cylinder 98 connected to the bottom of the triangular shape,
The leading end of 00 is connected to the fixing pin capturing tool 94. Therefore, after the turntable 32 is intermittently fed by a distance corresponding to the arrangement interval of the molding die 12, the moving pin catching tool 68 of the intermittent feeding section 62 is moved by the specific pin 72.
Immediately before being removed from the fixing pin catching tool 9
4 is moved in the radial direction via the drive source 96. Then, by catching the pin 72 located on the downstream side of the detached pin 72 by the moving pin catching tool 68 in the groove 94a, the turntable 32 is locked to prevent free rotation in the circumferential direction. It is configured.

[0021]

[Raw Material Injecting Mechanism] The above described raw material injecting mechanism 16 is arranged at a predetermined position of the turntable 32 constituting the mold feeding mechanism 14, as shown in FIGS. The raw material injection mechanism 16 includes a raw material injection nozzle 1 that communicates with a storage tank 102 that supplies the urethane raw material.
04 and the roll forming die 12 that has come to a fixed position and stopped.
With respect to the injection nozzle 104, an advancing / retreating mechanism 106 for moving the injection nozzle 104 forward and backward, and a reciprocating slide mechanism capable of reciprocating a required distance in the lateral direction with the injection nozzle 104 in contact with the injection hole 42 of the molding die 12. And 108. Of these, the raw material injection nozzle 104
Is placed on the second support base 110 arranged along the tangential direction of the turntable 32, and at least two injection holes 42 formed in the roll forming die 12 are simultaneously formed. The block is set to have a lateral dimension that can be closed, and is formed of a block body in which a nozzle hole 104a is opened at a substantially central portion thereof (FIG. 12). The surface of the injection nozzle 104 that abuts on the recessed portion 44 of the roll forming die 12 is curved so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32 having a required diameter. As described above, when the concave portion 44 is linearly formed, the contact surface of the injection nozzle 104 is also necessarily linearly formed. The second support base 110 is set to have a height such that the injection nozzle 104 is horizontally aligned with the injection hole 42, and is integrally attached to a support rail 134 ([0026]) described later. Has been.

As shown in FIG. 8, the advancing / retreating mechanism 106 is an actuator 112 installed on the upper surface of the second support base 110, and has a tip end portion of a rod 113 extending movably from its main body. The raw material injection nozzle 104
Is provided. Then, by activating the actuator 112 and moving the rod 113 in the direction in which the rod 113 approaches in the radial direction of the turntable 32, the raw material injection nozzle 104 comes into contact with the injection hole 42 of the roll forming die 12. There is.

Further, on the third support base 114 installed on the downstream side of the second support base 110, the raw material injection nozzle 104 brought into contact with the injection hole 42 of the roll forming die 12 is tangent to the turntable 32. The reciprocating slide mechanism 108 that can reciprocate a required distance along the direction is provided. That is, as shown in FIG. 8, the reciprocating slide mechanism 108 is provided with a ball screw 118 disposed on a portion located outside the portion on which the third support base 114 is disposed and one end portion of the ball screw 118. It is composed of a rotary drive source 120 such as an installed motor. Ball screw 118
A nut (not shown) is screwed and arranged in. A plate member 124 having a projection 122 on the upper surface thereof is integrally arranged on the nut, and a hooking piece 126 is hooked on the projection 122.

As shown in FIG. 8, the hooking piece 126 projects outward in the radial direction of the turntable 32 at a required position of the support rail 134 ([0026] described later) and allows the projection 122 to be inserted therethrough. The long hole 126a is a member having a required length, and the projection 122 is formed in the long hole 126a.
Is intervening. By activating the reciprocating slide mechanism 108 in this state, the hooking piece 126 is moved in a predetermined direction via the plate member 124 and the projection 122, and the second support base 110 is moved via the support rail 134. Can be made. Therefore, the urethane raw material can be injected into the cylindrical cavity 30 in a state where the raw material injection nozzle 104 is in contact with the injection holes 42 of the molding die 12 that are stopped, and the raw material injection nozzle 104 that has completed the injection can be The reciprocating slide mechanism 108 causes the turntable 32
It is configured to be able to reciprocate along the tangential direction of.

[0025]

[Tape Supply Mechanism] As shown in FIGS. 1 and 8, the tape supply mechanism 18 is arranged at a position adjacent to the raw material injection mechanism 16. The tape supply mechanism 18 is configured to be capable of reciprocating along the circulation path of the roll molding die 12 for a required distance, and forcibly contacts the injection hole 42 of the molding die 12. The long tape 128 (described later in [0029]) that prevents the urethane raw material from flowing out from the injection hole 42 is fed out and supplied.

In the tape supply mechanism 18, an endless belt 130 is arranged on the downstream side of the raw material injecting mechanism 16 along the circulation path of the roll forming die 12. As shown in FIG. 8, the endless belt 130 includes a plurality of support rollers 132 arranged at predetermined intervals along the circumferential direction of the roll forming die 12 arranged on the turntable 32, and the support rollers. A member wound around another support roller 133 arranged at a predetermined interval from the group on the outer side in the radial direction of the turntable 32,
It is configured to start rotation via a drive source (not shown). Further, each supporting roller 132 and another supporting roller 1
33 is arranged vertically below the support rail 134 formed with a curvature corresponding to the arrangement of the roller group. That is, as shown in FIG. 8, the support rail 134 is a member set to have a length of about 1/8 to 1/10 of the turntable 32 in the orbiting direction, and is an upper surface of the third support base 114. In the above, the plurality of rollers 1 arranged at predetermined intervals along the extension path of the support rail 134.
It is mounted on the upper peripheral end face of 38.

As the tape supply mechanism 18, the endless belt 130 is rolled into the roll forming die 12 in synchronization with the reciprocating slide of the injection nozzle 104.
A belt slide mechanism 142 that reciprocally slides along the circulation path is provided. That is, the belt slide mechanism 142 is also used as the reciprocal slide mechanism 108 that reciprocally slides the raw material injection nozzle 104, and as shown in FIG. 8, the third support base 114 is used.
The ball screw 118 is provided at a portion located outside of the portion where is provided, and a rotary drive source 120 such as a motor provided at one end of the ball screw 118.

Further, on the upstream side of the support rail 134,
A tape supply source 150 is provided. The tape supply source 150 is a roll itself of the tape from which the long tape 128 is fed, one end of which is interposed between the endless belt 130 and the roll forming die 12, and the endless belt 130 turns. When the table 32 is moved in the upstream direction in the loop path, the tape is supplied from the tape supply source 150 accordingly. That is, the rotation drive source 120 of the reciprocating slide mechanism 108 (belt slide mechanism 142) is rotationally activated in one direction, and the supporting rail 134 together with the latching piece 126 is predetermined on the roller 138 via the plate member 124 and the projection 122. By moving to the position, the long tape 128 is fed from the tape supply source 150. Further, after stopping at a predetermined position on the upstream side, the rotation driving source 102 is reversed to move the support rail 134 to the downstream side.

As the long tape 128, a part of the urethane raw material leaked into the roll forming die 12 is absorbed and swelled, and the leaked urethane raw material itself is used as a sealing material to seal the injection hole 42. A material, for example, a kraft tape, which can be easily closed in a state where the property is secured and which can be easily peeled from the molding die 12 after the raw material is cured is preferably used. That is, the long tape 128
Has a so-called two-layer structure in which the side contacting the recessed portion 44 is a kraft tape and the side contacting the endless belt 130 is laminated with polyethylene coat. Since the polyethylene coat is not impregnated with urethane, the endless belt 130 is preferably prevented from being inadvertently soiled. Further, the endless belt 130 and the tape supply source 150 in the tape supply mechanism 18 are constructed as a detachable cassette type.

[0030]

[Mold heating means] A mold heating means 20 is disposed downstream of the raw material injection mechanism 16. That is, as shown in FIG. 1 and FIG. 9, the mold heating means 20 is required to be arranged along the circulation path of the roll forming mold 12 at an interval corresponding to the arrangement interval of the forming mold 12. Basically, a plurality of stands 152, a pair of heating plates 154 arranged on the stands 152, and a drive mechanism 156 for moving the pair of heating plates 154 toward or away from each other.

Of these, a pair of support members 158 are disposed on and suspended from the stand 152 at positions sandwiching the roll forming die 12 in the radial direction. Support member 158
Is a plate-like member that is formed vertically longer than the roll forming die 12, and the inner side surface portion that faces each die half 26,
Three heating plates 154 corresponding to the recesses 48 provided in the molding die 12 are arranged at positions separated by a predetermined distance in the vertical direction. That is, the heating plate 154 is
An electric heater as a heating source is arranged on a plate material having a required thickness formed to have a size capable of engaging with 8, and as shown in FIGS. 9 and 10, for example, a cushioning member using a compression spring or the like. It is arranged on the support member 158 through 160 and a mounting stay 161 arranged at its open end. An insulating material (not shown) (for example, gypsum board) having a required thickness is interposed between the heating plate 154 and the mounting stay 161 to increase the thermal conductivity of the mold half 26.

The drive mechanism 156 for moving the support member 158 provided with the heating plate 154 closer to and separated from the roll forming die 12 is the double-acting cylinder 162 provided at the upper end of the support member 158. It is composed of a guide rail 164. As shown in FIG. 9, the double-acting cylinder 162 is installed horizontally with respect to both supporting members 158, and is arranged in parallel with the double-acting cylinder 162 by moving the rod 166 thereof so as to move back and forth. The support member 158 is provided along the guide rail 164 so that the roll forming die 1
It is configured so as to be close to and separated from 2. Although three heating plates 154 are arranged on the supporting member 158, among the plural supporting members 158 arranged, for example, the supporting member 158 arranged on the downstream side from the heating plate 154 is arranged. Two
It is provided as a base. Thereby, the temperature of the roll forming die 12 can be adjusted and the curing speed of the urethane raw material can be adjusted. Regarding the heating plate 154,
Two or four or more may be arranged for one support member 158. Further, even when the vertical dimension of the supporting member 158 is set to a length capable of arranging the three heating plates 154 as in the present embodiment, all the heating plates 154 are arranged according to the type of raw material. It does not have to be arranged.

[0033]

[Tape Peeling Mechanism] As shown in FIG. 1, a tape peeling mechanism 22 is arranged at a fixed position downstream of the tape supply mechanism 18 and close to the circulation path of the roll forming die 12. . That is, the tape peeling mechanism 22
Is a tape winding body 168 rotatably provided at the fixed position.
A rotation drive mechanism 17 for winding the tape by rotating the tape winding body 168 intermittently at a required timing.
It is basically composed of 0 and 0. Tape winding body 168
Is an assembly of a rectangular frame body on the upper surface of a mounting table formed in a circular shape, and the turntable 3 is mounted via a rotary drive mechanism 170 such as a motor disposed below the mounting table.
The long tape 128 which is in contact with the injection hole 42 of the molding die 12 is peeled from the injection hole 42 by rotating in the direction opposite to the circling direction of 2.

The tape peeling mechanism 22 is provided with a torque limiter (not shown). In tape winding, when the turntable 32 in a stopped state starts to rotate, a rotational driving force is applied to the tape winding body 168 in advance to apply tension to the long tape 128. It is possible to suitably prevent the tape 128 from being inadvertently broken. Similarly to this, even when the turntable 32 is stopped from the rotating state, a rotational driving force is applied to the tape winding body 168 to pull the long tape 128 to prevent the tape 128 from breaking. It is effective. Therefore, the driving force from the rotary drive mechanism 170 is applied to the tape winding body 1 before or after the turntable 32 is rotated.
The torque limiter is operated so that a so-called slip state can be generated so that the mechanism 170 can be continuously applied and damage to the mechanism 170 can be prevented.

[0035]

[Roll Demolding Station] As shown in FIG. 1, the mold 12 is opened at a fixed position on the downstream side of the tape peeling mechanism 22 and close to the circulation path of the roll mold 12. A roll demolding station 24 is provided for demolding the rod-shaped urethane foam roll 229 molded in the cylindrical cavity 30 from the cavity 28. That is, in the roll-demolding station 24, the L-shaped arm 36 arranged along the outer circumference of the turntable 32 is swung outward in the radial direction of the table 32 at a required timing.

The rod-shaped member 38 is integrally arranged on the L-shaped arm 36 at a position near the upper end portion pivotally supported by the bracket 34 so as not to interfere with the molding die 12 stopped at the roll demolding station 24. It is set up. A roller 172 is rotatably supported by the open end of the rod-shaped member 38, and as shown in FIG. 16, the roller 172 is arranged along the outer periphery of the turntable 32 and is a pressing member. By being pressed downward by 174, the lower end portion of the L-shaped arm 36 tilts about the pivotal support portion so as to be radially separated from the center of the turntable 32. This facilitates the work posture when the mold is opened with respect to the roll forming mold 12 that is stopped, and also facilitates the release of the foamed molded product from the cavity half body 28. Further, since the open surface of the mold half body 26 is inclined, it becomes easy to set the core 40 in the cavity half body 28,
Further, cleaning of the cavity half 28 can be simplified.

[0037]

[Regarding Core Removing Device] The round bar-shaped core 40, which is concentrically inserted and arranged in the cylindrical cavity 30 of the roll molding die 12, is located immediately upstream of the roll demolding station 24 and in the roll molding die. It is configured to be extracted by a core removing device 176 provided at a fixed position close to the 12 circulation paths. That is, as shown in FIG. 11, the core removing device 176 is arranged on a supporting base 178 assembled in a turret shape with a size sufficiently higher than that of the turntable 32. Grip mechanism 1 for holding the common base 50 provided with the rod-shaped core 40 so as to be openable and closable
80, a grip elevating mechanism 182 that raises and lowers the grip mechanism 180 by a distance sufficient to remove the core 40 from the roll forming mold 12, and the grip mechanism 180 from the extraction position of the core 40 to the inside. Child 4
Basically, it is composed of a grip moving mechanism 184 for moving to a 0 release position.

As shown in FIG. 7, a horizontal rail 186 is horizontally installed on the upper end of the supporting base 178 along the direction substantially aligned with the radial direction of the turntable 32. A guide rail 188 is arranged in parallel on the upper surface of the horizontal rail 186, and a rectangular mounting base 190 on which the grip elevating mechanism 182 is arranged moves along the guide rail 188 on the upper surface. It is mounted as possible.
The grip elevating mechanism 182 is a double-acting cylinder 192 that is arranged in an inverted state with respect to the mounting base 190, and penetrates the mounting base 190 from its cylinder body 194 to advance and retreat vertically downward. The grip mechanism 180 is arranged at the lower end of the rod.

The grip mechanism 180 is composed of a pair of gripping pieces 196 arranged to face each other and a drive source 198 such as a known air torque actuator for moving the gripping pieces 196 close to and away from each other in an arc shape. , This drive source 1
By driving 98 to open and close the gripping piece 196, the common base 50 provided on the core 40 is gripped. Further, the grip moving mechanism 184 is arranged at a position along the guide rail 188. As shown in the drawing, the grip moving mechanism 184 includes a ball screw 200 arranged along the guide rail 188.
A nut (not shown) screwed into the ball screw 200 is fixed to the mounting base 190. Therefore, by activating a drive source (not shown) arranged on one end side of the ball screw 200 to move the nut, the grip mechanism 180 and the grip elevating mechanism 182 are moved to the center as shown in FIG. The core 40 is reciprocated between the extraction position and the core 40 release position.

Further, a core accumulating station 202 is provided at a position adjacent to the core removing device 176. In this core collecting station 202, as shown in FIGS. 1 and 11, the grip lifting mechanism 182 has a core 40.
The pair of support rails 204 are arranged in parallel so as to incline downward at a slight angle from the vertically downward position where the support rails 204 are opened.
The rods positioned at both ends of 0 are set to a size so as to be hooked on the rail 204 between the rods and the common base 50.
The roll forming die 1 is made by the grip mechanism 180.
The cores 40 taken out from No. 2 are transferred to the core stacking station 202 and sequentially stacked.

A mold cooling mechanism 206 is arranged at an appropriate position in the circulation path of the roll forming mold 12. That is, the mold cooling mechanism 206 is a mechanism such as a blower fan, and as shown in FIG. 1, it is preferably arranged between the roll demolding station 24 and the raw material injection mechanism 16, As will be described later ([005
7]), it is designed to work. Further, a mold temperature detecting section 208 including, for example, a temperature sensor is arranged at a position located further downstream from the cooling mechanism 206, and the temperature sensor is provided on the mold half 26 of the roll forming mold 12. Is contacted from the outer surface to indirectly measure the inner temperature.

Further, between the die heating means 20 and the core removing device 176, as shown in FIG.
10 are provided. The preheating mechanism 210 is a mechanism configured substantially the same as the mold heating means 20.
That is, the preheating mechanism 210 includes the roll forming die 1
A required number (two in the embodiment) of heating plates 154 arranged at intervals corresponding to the intervals at which the molding dies 12 are arranged along the two circulation paths, the heating plates 154 being the molds. Heating means 2
0 through the drive mechanism 156 similar to
It is adapted to be moved close to or away from.

[0043]

Next, the operation of the urethane foam roll manufacturing apparatus according to the above-described embodiment will be described. The turntable 32 on which the roll forming die 12 is arranged is intermittently fed by the die feeding mechanism 14 at required intervals. That is, when intermittent feed is performed, as shown in FIG. 7, the moving pin catching tool 68 of the intermittent feed section 62 is used.
By advancing in the radial direction of the turntable 32,
The specific pin 72 on the stopped turntable 32 is captured by the moving pin capturing tool 68. After that,
By moving the slider 64 forward in the tangential direction of the table 32, the moving pin catching tool 68 and the pin 72 are moved.
The turntable 32 through the roll forming die 12
Intermittent feed is performed by a distance according to the arrangement interval.

At the timing immediately after the intermittent feed is completed and the moving pin catching tool 68 is disengaged from the specific pin 72, the fixing pin catching tool 94 arranged in the table lock mechanism 88 is moved in the radial direction. And advances to the pin 72 aligned with and is captured. As a result, the turntable 32 is supported and fixed so as not to rotate. Further, the moving pin catching tool 68 of the intermittent feeding section 62 retreats as it is along the radial direction,
After separating from the specific pin 72, the slider 64 is retracted in the tangential direction to return to the original position and wait for the next intermittent feed.

By intermittently feeding the turntable 32 in this manner, the roll forming die 12 arranged on the outer periphery of the turntable 32 sequentially arrives at the raw material injecting mechanism 16.
In the raw material injecting mechanism 16, the raw material injecting nozzle 104 connected to the advancing / retreating mechanism 106 advances to the roll forming die 12 that has reached a fixed position and the intermittent feeding has stopped. In the nozzle 104 that has advanced, the nozzle hole 104a provided in the substantially central portion of the block body is shown in FIG.
As shown in (b), the injection hole 4 formed in the molding die 12
Of the two, the injection hole 42 located on the most downstream side in the orbiting direction of the turntable 32 first comes into contact with the turntable 32 to spatially communicate therewith. Further, the long belt 128 is wound around the endless belt 130 of the tape supply mechanism 18 arranged immediately downstream of the raw material injection nozzle 104 in a state where the polyethylene coat side is in contact with the endless belt 130. In close proximity.

In this state, the storage tank 102 is
The urethane raw material is injected into the cavity 28 through the injection nozzle 104. After the injection into the injection hole 42 located on the most downstream side is completed, the raw material injection nozzle 10
4 is the front reciprocating slide mechanism 108 (belt slide mechanism 1
42) to the adjacent upstream injection hole 42. At this time, the upstream end of the endless belt 130 is
While moving to the upstream side following the raw material injecting nozzle 104 while maintaining the initial gap, the long tape 128 wound around the upstream end of the endless belt 130 is fed from the tape supply source 150, Immediately after the injection of the urethane raw material is completed, the injection holes 42 are sequentially closed. Then, as shown in FIGS. 13A and 13B, when the injection nozzle 104 moves to the injection hole 42 located on the most upstream side to inject the urethane raw material, three injections on the downstream side are performed. The hole 42 is closed by the long tape 128.

At this time, the recessed portion 44 of the molding die 12 in which the injection hole 42 is provided is curved and formed so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32 as described above, and the raw material is injected. The nozzle 104 has the recessed portion 44.
The surface portion that abuts on is also curved so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32. Therefore, at the time of injecting the urethane raw material, the nozzle hole 104a of the injection nozzle 104 comes into close contact with the injection hole 42, so that the raw material hardly leaks. Moreover, the block body serving as the injection nozzle 104 is set to have a lateral dimension capable of simultaneously closing at least two injection holes 42. Therefore, even when the injection nozzle 104 intermittently moves to the upstream side along the recessed portion 44 after the injection of the raw material from the injection hole 42 located on the downstream side is completed, the injection hole 42 on the immediate downstream side is also formed. However, since the close contact state is maintained by the nozzle 104, leakage of the urethane raw material is suppressed to a minimum until just before being closed by the long tape 128. Further, when the recessed portion 44 is formed linearly, the raw material injection nozzle 104 is also formed linearly, so that the nozzle hole 104a of the injection nozzle 104 can move in close contact with the injection hole 42. It is configured.

The urethane raw material tends to leak to the outside even after being blocked by the long tape 128. However, as described above, the long tape 128 is preferably a craft tape in which the leaking urethane raw material itself secures the sealing property of the injection hole 42 by absorbing and swelling a part of the leaking urethane raw material. It is used. That is, rather than forcibly preventing the leak, rather than leaking part of the raw material and using it as a stopper, the leak of the urethane raw material is rather good and easily prevented, and After the raw material is cured, the molding die 1
2 can be easily peeled off.

After the completion of the injection of the urethane raw material into the injection hole 42 on the most upstream side, the roll forming die 12 which has been in the intermittently stopped state until then, as shown in FIGS. 14 (a) and (b), It is intermittently fed to the downstream side by a predetermined distance together with the timing of injection termination. In addition, the raw material injection nozzle 104
It itself moves to the downstream side integrally with the molding die 12 in a state where the nozzle holes 104a are aligned with the injection holes 42. Immediately before the molding die 12 located on the upstream side arrives at a fixed position (that is, the intermittent feed is completed), as shown in FIG.
As shown in (b) and (b), from the position aligned with the injection hole 42 located on the most upstream side of the molding die 12 on the downstream side to the injection hole 42 on the most downstream side of the molding die 12 located on the upstream side. Move towards. At this time, the raw material injection nozzle 104
Moves while contacting with the connecting member 45, so that the leakage of the urethane raw material from the nozzle 104 is minimized. The injection hole 42 on the most upstream side of the molding die 12 on the downstream side is closed by the long tape 128, and the injection hole 4 of the roll molding die 12 newly arrived at a fixed position.
The raw material injection nozzles 104 are aligned with each other.

The urethane raw material injected from each injection hole 42 is supplied to each of the above-mentioned cylindrical cavities 30 through the groove 46 communicating with the injection hole 42. Roll forming die 12 in which the raw material is injected into each cylindrical cavity 30
Moves to the mold heating means 20 arranged on the downstream side of the raw material injection mechanism 16 as shown in FIG. In the mold heating means 20, the drive mechanism 156 is normally operated at the timing at which the roll forming mold 12 intermittently arrives at the fixed position of the stand 152. That is, in this case, the double-acting cylinder 162 is actuated to move the rod 166 in the direction to be housed in the cylinder body.
As a result, the pair of support members 158 arranged with the roll forming die 12 interposed therebetween are moved in the direction of approaching the forming die 12 while being guided by the guide rails 164.
Then, when the support member 158 completes its movement, the plurality of heating plates 154 arranged therein are engaged with the recesses 48 formed in the molding die 12.

As described above, the heating plate 154 is provided with an electric heater, and is heated to a predetermined temperature by being energized at an appropriate timing. Then, the heating plate 154 heated to a predetermined temperature is brought into contact with the recess 48 to heat the roll forming die 12 to a predetermined temperature. At this time, the heating plate 154 is urged by a buffer member 160 such as a compression spring arranged between the heating plate 154 and the support member 158 at a required pressure to be brought into contact with the heating plate 154 in a substantially intimate contact state. Then, the heating plate 154 is held and heated from both sides thereof for the stop time of the molding die 12, and the urethane raw material injected into the cylindrical cavity 30 is cured. Then, at the timing when the required heating time has elapsed, the drive mechanism 156 is
Is reversely operated to open the pair of heating plates 154. By disposing the supporting member 158 having a reduced number of heating plates 154 in a part thereof, as described above, the temperature of the roll forming die 12 is adjusted and the curing speed of the urethane raw material is adjusted.

The molding die 12, which is being cured by the die heating means 20, intermittently moves about half the circumference of the table 32 to reach the tape peeling mechanism 22. In the peeling mechanism 22, the molding die 12
The long tape 128 that is disposed in the recessed portion 44 and closes the injection hole 42 is peeled off by the tape winding body 168 that is driven via the rotation drive mechanism 170. The long tape 128 is cut at an appropriate place when the winding operation has progressed to a certain degree, and the tape winding body 16 is cut.
8 and then discarded.

When the curing is completed in the cavity 28,
The roll forming die 12 from which the long tape 128 has been peeled off by the tape peeling mechanism 22 arrives at the core removing device 176 located immediately downstream. In this core removing device 176, as shown in FIG. 11, the horizontal rail 186 of the supporting base 178 is used.
The grip elevating mechanism 182 and the grip mechanism 180 arranged below the grip elevating mechanism 182 are arranged above the grip moving mechanism 184 arranged in the vertical direction, and the grip moving mechanism 182 and the grip mechanism 180 are arranged vertically above the peripheral path of the roll forming die 12. Then, the intermittently fed roll forming die 12 arrives at a position where the core 40 is aligned vertically below the grip mechanism 180 by the die feeding mechanism 14, and the intermittent feeding is stopped. In this state, by urging the double-acting cylinder 192 that constitutes the grip mechanism 180, the rod extending downward from the cylinder body 194 is projected, so that the grip mechanism 180 is fixed to the common base 50 of the core 40. Appear from above. In the grip mechanism 180 close to the common base 50, the gripping piece 196 is opened via the drive source 198, and then the common base 50.
It is gripped by closing at the position that reached.

As shown in FIG. 11, the grip mechanism 180 gripping the common base 50 has a grip lifting mechanism 18 as shown in FIG.
It is moved upward by 2. At this time, the foam-molded article cured in the cylindrical cavity 30 of the roll-molding die 12 has the groove 46 formed at the lower end of the cavity 30.
The upward movement is restricted by the portion formed on the.
Therefore, by forcibly moving the core 40 upward with respect to the roll forming die 12, the cylindrical cavity 3
Only this foamed molded product remains at 0. Also, the core 40 is
The lower end thereof is lifted up to a position where it is completely separated from the molding die 12, and is conveyed by the grip moving mechanism 184 vertically above the upstream end of the core stacking station 202, that is, to the release position of the core 40. . At this time, the core 40 is rotated 90 degrees from the state in which the grip mechanism 180 is separated from the roll forming die 12, and is aligned with the extending direction of the support rail 204 constituting the stacking station 202. Then the grip mechanism 180
When the core is released, it is transferred to the core stacking station 202 and sequentially stacked as described above.

The core 40 of the roll forming die 12 which has passed through the tape peeling mechanism 22 and has reached the core removing device 176 is extracted by the core removing device 176 in a state where the heating temperature thereof hardly drops. And molding die 12
After the urethane foam roll 229 is removed from the cylindrical cavity 30 at the next roll demolding station 24, the core 40 is set in the cavity 30 again. At this time, if a large temperature difference is generated between the core 40 and the molding die 12, as described in the prior art, the curing of the urethane raw material in the subsequent step is adversely affected. Therefore, the core 40 separated from the molding die 12
The time is adjusted so that the number of stacks in the core stacking station 202 is small, so that the so-called tact time of being set in the mold 12 again after being separated from the mold 12 is shortened as much as possible. It As a result, the temperature drop of the core 40 is suppressed, the total energy loss is reduced, and the temperature difference between the parts in the molding die 12 during the injection of the urethane raw material is suppressed to be small. In addition, at the beginning of starting the urethane roll manufacturing apparatus 10, the temperatures of the roll forming die 12 and the core 40 have not reached the temperature suitable for curing the urethane raw material. Therefore, after all the cores 40 have been mounted on the roll molding die 12 arranged on the turntable 32, the table 32 is rotated from two rounds to three rounds.
The so-called color operation is performed for about the circumference, during which the mold heating means 20
The temperature of each molding die 12 and the core 40 is raised to a temperature suitable for curing the urethane raw material.

Roll forming die 1 with core 40 removed
2 moves to the roll demolding station 24 arranged on the downstream side of the core removing device 176. In the roll-demolding station 24, as shown in FIG. 16, the pressing member 174 arranged along the outer circumference of the turntable 32 is arranged in the L-shaped arm arranged along the outer circumference of the turntable 32. 36 is pressed radially outward of the table 32 at a required timing. That is, in this pressing, the roller 172 arranged at the tip of the rod-shaped member 38 of the L-shaped arm 36 is pressed by the pressing member 174 from above to below, so that the rod-shaped member 38 and the L-shaped member 38. It is swung via the arm 36. Then, as described above, the roll forming die 12 is stopped.
Is tilted to the front to facilitate the work posture when the mold is opened. Further, the core 40 is set again after the mold releasing of the molded product at the roll releasing station 24 is completed. In this case, since the roll forming die 12 is tilted, the core 4 with respect to the cavity half 28 is
It is easy to mount the core 0 and the core 40 is preferably prevented from falling off.

The molding die 12 is cooled to a predetermined temperature as required by the die cooling mechanism 206 arranged on the downstream side of the roll demolding station 24.
As a case to be cooled, a section that is preferably used when heated to a temperature higher than the appropriate curing temperature of the urethane raw material used in the manufacturing process or when the composition of the urethane raw material used is changed. Is. Further, whether or not this temperature is an appropriate temperature is measured by the mold temperature detection unit 208 arranged further downstream of the mold cooling mechanism 206. Further, the roll forming die 12 may be heated by the preheating mechanism 210 while the die heating means 20 reaches the core removing device 176. In this case, when the temperature detected by the mold temperature detection unit 208 is low and it is indirectly determined that the temperature rise in the mold heating means 20 arranged immediately downstream thereof is not sufficient. To start.

[0058]

As described above, in the apparatus for manufacturing a urethane foam roll according to the present invention, according to the invention of claim 1, a roll forming die and a plurality of the die are arranged at required intervals. A die feed mechanism, a raw material injecting mechanism provided at a fixed position close to the circulation path of the roll forming die, a tape feeding mechanism arranged immediately downstream of the raw material injecting mechanism, and a downstream of the raw material injecting mechanism. Side, a die heating means, a tape peeling mechanism provided on the downstream side of the tape supply mechanism, and a roll demolding station arranged on the downstream side of the tape peeling mechanism. Therefore, the work directly involved by the worker in the process of manufacturing the urethane foam roll is extremely small, and the work load is significantly reduced.

According to the second and third aspects of the present invention, in the invention according to the first aspect, the core mounted in the cavity of the roll forming die is formed in a comb tooth shape, and the core is positioned. Since it can be done by matching the fixed position of the molding die with the pin, mounting of the core becomes extremely easy. In the invention according to claim 4, in the invention according to claim 1, by arranging the roll shaft in advance, the roll can be formed without the work of removing the core.

In the invention according to claim 5 to claim 7, in the mold feeding mechanism according to claim 1, the feeding mechanism is composed of a turntable having a required diameter and an intermittent feeding part, and is required on the outer periphery of the table. The plurality of roll forming dies arranged at intervals can be intermittently fed endlessly by the intermittent feeding portion by a distance corresponding to the arrangement distance. Further, the intermittently fed turntable is configured so that the table lock mechanism prevents the table from freely rotating in the circumferential direction.

In the inventions according to claims 8 to 10,
6. The mold feeding mechanism according to claim 5, wherein an L-shaped arm is arranged on the outer periphery of the turntable via a bracket, and the rod-shaped member arranged on this arm is pressed downward, whereby the L-shaped arm is formed. The roll forming die is tilted toward the front side through the arm, and the work posture for the operator when the die is opened can be improved, and the work can be easily performed.

In the invention according to claim 11 to claim 14, in the raw material injecting mechanism according to the first aspect, the raw material injecting nozzle is constructed so as to be movable back and forth in the roll forming die through the moving back and forth mechanism, and the reciprocating slide mechanism. The injection nozzle is configured to be slidable while being aligned with the injection hole formed in the molding die. Therefore, the urethane raw material can be injected into the cavity without manual work by the operator.

In the invention according to claims 15 to 18, in the tape supply mechanism according to claim 1, an endless belt, a belt slide mechanism for reciprocally sliding the belt along a circulation path of a molding die, and the tape supply mechanism. And a tape supply source for feeding out the long tape. Therefore, when the raw material injecting nozzle moves along the roll forming die while injecting the urethane raw material, the long tape follows this via the belt slide mechanism, so that the urethane raw material from the injection hole is injected. Leakage is preferably prevented.

In the inventions according to claims 19 to 21, in the mold heating means according to claim 1, a heating plate is arranged along the circumference of the roll forming mold, and this heating plate is used as a driving mechanism. It is configured to move close to and hold the molding die to heat it, and reverse the driving mechanism at a predetermined timing to release the heating plate. Thereby, the molding die is heated to a temperature suitable for curing the urethane raw material injected into the cavity.

According to a twenty-second aspect of the invention, in the tape peeling mechanism according to the first aspect, the tape winding body is arranged at a position close to the winding path of the roll forming die, and the tape winding body has a rotation driving mechanism. Is provided. As a result, the tape winding body rotates following the intermittent feeding of the roll forming die, so that the long tape forcibly brought into contact with the injection hole of the forming die can be favorably peeled off. it can.

According to the twenty-third to twenty-fifth aspects of the present invention, in the core according to the second and third aspects, the core is removed from the state of being concentrically arranged in the cavity of the molding die through the core removing device. It is configured to Therefore, the worker does not need to directly grasp the roll forming mold and the core heated to a high temperature with fingers or the like, and the work can be safely performed.

According to a twenty-sixth aspect of the invention, in the invention according to the first aspect, a die cooling mechanism such as a blower fan is arranged in the circulation path of the roll forming die. Therefore, temperature control can be easily achieved when the temperature is higher than the proper temperature or when the composition of the urethane raw material is changed. Further, in the invention according to claim 27, in the invention according to claim 1,
A mold temperature detecting unit is arranged in the circulation path of the roll forming mold. Therefore, it is possible to easily measure the temperature when the temperature is higher than the proper temperature or when the composition of the urethane raw material is changed.

[Brief description of drawings]

FIG. 1 is an overall plan view showing an apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 2 is an overall side view showing an apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a front view showing a roll forming die and a core in an open state in the apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 5 is a cutaway perspective view of a main part of the apparatus for manufacturing a urethane foam roll according to the preferred embodiment of the present invention, showing a core mounted on a roll molding die.

FIG. 6 is a perspective view showing a roll shaft mounted on a roll molding die in the apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 7 is a plan view of essential parts showing an intermittent feeding part and a core removing device in the apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 8 is a plan view of essential parts showing a raw material injecting mechanism and a tape supplying mechanism in the apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 9 is a side view of essential parts showing a mold heating means in the apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 10 is a front view of essential parts showing a mold heating means in the apparatus for manufacturing a urethane foam roll according to a preferred embodiment of the present invention.

FIG. 11 is a front view showing a core removing device and a core accumulating station in a urethane foam roll manufacturing apparatus according to a preferred embodiment of the present invention.

FIG. 12 is a first operation diagram showing a state in which the urethane raw material is injected into the roll forming die in the apparatus for manufacturing the urethane foam roll according to the preferred embodiment of the present invention.

FIG. 13 is a second operation diagram showing a state in which the urethane raw material is injected into the roll forming die in the apparatus for manufacturing the urethane foam roll according to the preferred embodiment of the present invention.

FIG. 14 is a third operation diagram showing a state in which the urethane raw material is injected into the roll forming die in the apparatus for manufacturing the urethane foam roll according to the preferred embodiment of the present invention.

FIG. 15 is a fourth operation diagram showing a state in which the urethane raw material is injected into the roll forming die in the apparatus for manufacturing the urethane foam roll according to the preferred embodiment of the present invention.

FIG. 16 is a side view of essential parts showing a state in which the roll forming die is tilted via the L-shaped arm in the apparatus for manufacturing a urethane foam roll according to the preferred embodiment of the present invention.

FIG. 17 shows a roll forming die used for curing a urethane raw material in the production of a urethane foam roll according to a conventional technique, in which (a) is a plan view and (b) is a vertical side view.

FIG. 18 is a configuration diagram schematically showing a manufacturing process of a roll molding die into which a urethane raw material is injected in manufacturing a urethane foam roll according to a conventional technique.

[Explanation of symbols]

12 roll forming die, 14 die feeding mechanism, 16 raw material injecting mechanism 18 tape feeding mechanism, 20 die heating means, 22 tape peeling mechanism 24 roll demolding station, 26 die halves, 28
Cavity half 30 Cylindrical cavity, 32 Mold heating means, 34 Bracket 36 L-shaped arm, 38 Rod member, 40 Core, 4
2 injection hole 50 common base, 52 positioning pin, 54 reference recess, 56 roll shaft, 58 pivotal support part, 60 rotation support part 62 intermittent feed part, 64 slider, 66 first drive source, 68 pin capture tool 70 second Drive source, 72 pins, 88 Table lock mechanism 102 Storage tank, 104 Raw material injection nozzle, 104
a nozzle hole 106 advance / retreat mechanism, 108 reciprocating slide mechanism, 128
Long tape 130 Endless belt, 142 Belt slide mechanism 150 Tape supply source, 152 Stand, 154 Heating plate 156 Drive mechanism, 158 Support member, 160 Buffer member 168 Tape winding body, 170 Rotation drive mechanism, 176
Core removing device 180 Grip mechanism, 182 Grip lifting mechanism 184 Grip moving mechanism, 202 Core collecting station 206 Mold cooling mechanism, 208 Mold temperature detection unit 229 Foam urethane roll

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenji Kobayashi             2-70, Kamino-cho, Atsuta-ku, Nagoya-shi, Aichi               Rogers Inoac Co., Ltd. (72) Inventor Haruo Morita             2-70, Kamino-cho, Atsuta-ku, Nagoya-shi, Aichi               Rogers Inoac Co., Ltd. F-term (reference) 4F202 AA42 AG20 AH04 CA01 CB01                       CB12 CK18 CK89                 4F204 AA42 AG20 AH04 EA01 EB01                       EB12 EK02 EL01

Claims (27)

[Claims] 1. A mold (26) comprising two mold halves (26, 26) which can be opened and closed, and a cavity (28) for forming a urethane foam roll is recessed inside each mold half (26). A roll forming die (12) in which one mold half (26) is provided with an injection hole (42) for allowing the urethane raw material to be injected into the cylindrical cavity (30) defined during tightening, and the roll. A plurality of molding dies (12) are arranged at required intervals, and a die feed mechanism (14) that makes an endless orbit along a predetermined path by intermittently feeding each required interval, and the roll forming dies (12). A raw material injection nozzle (104) provided at a fixed position close to the circulating path, capable of coming into contact with and separating from the molding die (12) that has come to this fixed position and stopped, and capable of reciprocating a required distance along the circulating path (104) ), The injection nozzle (104) is brought into contact with the injection hole (42) of the molding die (12) that is stopped to feed the urethane raw material into the cylindrical cavity (30). A raw material injecting mechanism (16) to be put in, which is arranged immediately downstream of the raw material injecting mechanism (16) and is capable of reciprocating a required distance along the circulation path of the roll forming die (12), A tape feeding mechanism (18) for feeding and feeding a long tape (128) which is forcedly brought into contact with the injection hole (42) of the molding die (12) to prevent the urethane raw material from flowing out of the injection hole (42). ), And a required number of them are provided downstream of the raw material injection mechanism (16) and along the circulation path of the roll forming die (12) at intervals corresponding to the arrangement intervals of the forming die (12). And a mold heating means (20) for heating the respective mold halves (26) up to a required temperature by holding the molding mold (12) that comes intermittently from both sides for the stop time. Provided at a fixed position on the downstream side of the tape supply mechanism (18) and close to the circulation path of the roll forming die (12), and abutted on the injection hole (42) of the forming die (12). Long Tape (128)
And a tape peeling mechanism (22) for peeling from the injection hole (42), provided at a fixed position on the downstream side of the tape peeling mechanism (22) and close to the circulation path of the roll molding die (12), It is characterized by comprising a roll demolding station (24) for demolding the rod-shaped urethane foam roll (229) molded in the cylindrical cavity (30) by opening the molding die (12). Equipment for manufacturing urethane foam rolls. 2. The cylindrical cavities (30) are provided in parallel with each other in the roll molding die (12) at a required interval, and each of the cylindrical cavities (30) is concentrically provided with a round rod-shaped core (30). 40. The apparatus for manufacturing a urethane foam roll according to claim 1, wherein 40) is set to be removable. 3. The round bar-shaped core (40) is planted in a common base (50) in the number of the respective cylindrical cavities (30) in a comb shape.
Positioning pins (52) protruding parallel to the core (40) at both ends of the common base (50) are provided in reference recesses (54) recessed at fixed positions of the roll forming die (12). Match with the core (40)
The lower end of each of the cores (40) is concentrically set in the corresponding cylindrical cavity (30) by engaging the support hole (31) formed in the lower end of the cavity (30). The apparatus for manufacturing a urethane foam roll according to claim 2, wherein the apparatus is capable of 4. The cylindrical cavities (30) are provided in parallel with each other in the roll molding die (12) at required intervals, and concentrically with the respective cylindrical cavities (30), the roll shaft (56). The urethane foam roll manufacturing apparatus according to claim 1, wherein: 5. The mold feed mechanism (14) has a turntable (3) having a required diameter centered on a pivotal support (58) standing on the floor.
2), a rotation support portion (60) erected on the floor at a required central angle to rotatably support the turntable (32), and a plurality of peripheral portions of the turntable (32) at required intervals. An arranged roll forming die (12), and an intermittent feeding portion (62) for feeding the turntable (32) in one direction by a distance corresponding to the arrangement interval of the roll forming die (12) and stopping it. An apparatus for producing a urethane foam roll according to claim 1, which comprises: 6. The slider (6), wherein the intermittent feeding part (62) is arranged at a fixed position facing a circular path of the turntable (32) and can reciprocate in a tangential direction of the turntable (32).
4), a first drive source 66 for reciprocally driving the slider 64 in the tangential direction, and the slider 64 mounted on the slider 64 so that the slider can reciprocate in the radial direction of the turntable 32. A pin catching tool (68), a second drive source (70) for reciprocally driving the pin catching tool (68) in the radial direction, and the roll forming dies (12) on the turntable (32). Corresponding pins (72)
By moving the pin catching tool (68) forward in the radial direction, the turntable (3
After capturing the specific pin (72) in 2), the slider
By moving the (64) forward in the tangential direction, the turntable (32) is passed through the pin catching tool (68) and the pin (72).
Is intermittently fed by a distance corresponding to the arrangement interval of the roll forming die (12), and then the pin catching tool (68) is retracted in the radial direction to separate from the specific pin (72). The apparatus for manufacturing a urethane foam roll according to claim 5, wherein after that, the slider (64) is retracted in the tangential direction to return to the original position and wait for the next intermittent feed. 7. The intermittent feeding section (62) intermittently feeds the turntable (32) by a distance according to a die arrangement interval, and the pin catching tool (68) moves from the specific pin (72). 7. The urethane foam roll manufacturing apparatus according to claim 6, further comprising a table lock mechanism (88) for locking the turntable (32) to prevent free rotation in the circumferential direction immediately before the release. 8. The brackets (34) are arranged upright on the outer circumference of the turntable (32) at required intervals, and the upper ends of the L-shaped arms (36) are swingable at the upper ends of the brackets (34). The apparatus for manufacturing a urethane foam roll according to claim 5, wherein the roll forming die (12) is pivotally supported, and the roll forming die (12) is erected and fixed to the horizontally extending open end of the L-shaped arm (36). 9. The L-shaped arm (36) is oscillated outward in the radial direction of the turntable (32) at a required timing in the roll demolding station (24), whereby the L-shaped arm (36) is moved. The lower end of the roll forming die (12) fixed upright on the turntable (3)
The apparatus for manufacturing a urethane foam roll according to claim 8, wherein the work posture when the mold is opened is facilitated by inclining the front side away from 2). 10. A rod-shaped member (38) is integrally disposed on the L-shaped arm (36) at a position where it does not interfere with a molding die (12) stopped at the roll demolding station (24). Cage,
The rod-shaped member (38) is pressed downward to push the bracket (34).
By tilting the L-shaped arm (36) around the pivotal support part, the lower end of the roll forming die (12) which is stopped can be tilted toward the front side which is separated from the turntable (32). 10. The apparatus for manufacturing a urethane foam roll according to claim 9. 11. The raw material injection mechanism (16) comprises the raw material injection nozzle (10) communicating with a urethane raw material storage tank (102).
4), an advancing and retracting mechanism (106) for advancing and retracting the injection nozzle (104) with respect to the roll forming die (12) stopped at a fixed position, and the injection hole (42) in the forming die (12). ) To the injection nozzle (1
The apparatus for manufacturing a urethane foam roll according to claim 1, further comprising a reciprocating slide mechanism (108) for reciprocally sliding laterally in a state of abutting 04). 12. The injection nozzle (104) is composed of a block body having a lateral dimension capable of simultaneously closing at least two injection holes (42) formed in the roll forming die (12). The apparatus for manufacturing a urethane foam roll according to claim 11, wherein a nozzle hole (104a) is opened substantially at the center of the body. 13. An injection nozzle (1) comprising the block body
13. The urethane foam roll according to claim 12, wherein a surface of 04) that abuts on the roll forming die (12) is curved so as to substantially match a curve drawn by an outer peripheral surface of the turntable (32) having the required diameter. Manufacturing equipment. 14. The urethane raw material immediately before being injected into the cylindrical cavity (30) is obtained by a mechanical floss method in which a gas such as an inert gas is mixed into the foam raw material and mechanically stirred. Apparatus for manufacturing the urethane foam roll described. 15. The tape feeding mechanism (18) comprises the roll forming die (12) on the downstream side of the raw material injecting mechanism (16).
The endless belt (13
0), and a belt slide mechanism (142) that slides the endless belt (130) back and forth along the revolving path of the molding die (12) in synchronization with the reciprocating slide of the injection nozzle (104). One end of the long tape (128) is interposed between the endless belt (130) and the roll forming die (12), and the long tape (128) moves as the endless belt (130) moves in the upstream direction. ) And a tape supply source (150) capable of feeding and supplying the urethane raw material into the injection holes (42) of the molding die (12) by sliding the injection nozzle (104) in the upstream direction. The belt slide mechanism (142) also follows the movement of the endless belt (130) and the molding die (12) to insert the long tape (128) into the injection hole after the raw material is injected. The foam according to claim 1, wherein leakage of the raw material from the injection hole (42) is prevented by sequentially abutting against the (42). Urethane roll manufacturing equipment. 16. The urethane foam roll manufacturing apparatus according to claim 15, wherein the belt slide mechanism (142) is also used as the reciprocating slide mechanism (108) for reciprocally sliding the raw material injection nozzle (104). 17. The lengthy tape (128) absorbs a part of the urethane raw material leaked into the roll forming die (12) and swells so that the leaked urethane raw material itself is used as a sealing material. 16. A material, for example, kraft tape, which can be easily closed while ensuring the sealing property of the injection hole (42) and which can be easily peeled off from the molding die (12) after the raw material is cured. Apparatus for manufacturing the urethane foam roll described. 18. An endless belt (130) and a tape supply source (150) in the tape supply mechanism (18) are detachable cassette type, and the belt slide mechanism (14)
The apparatus for manufacturing a urethane foam roll according to claim 15, wherein the device can be attached to and detached from 2). 19. A required number of said die heating means (20) arranged at intervals corresponding to the arrangement intervals of said forming dies (12) along the circulation path of said roll forming dies (12). Stands (152)
And a pair of heating plates (154,
154) and a drive mechanism (156) for moving the pair of heating plates (154, 154) close to or apart from each other, at a timing when the roll forming die (12) comes to a fixed position of the stand (152) and stops. The drive mechanism (156) is normally operated to hold the molding die (12) by the pair of heating plates (154, 154), and the drive mechanism (156) is reversely operated when a required heating time has elapsed. Let the pair of heating plates (154, 15
4. The apparatus for producing a urethane foam roll according to claim 1, wherein 4) is opened. 20. A pair of support members for the stand (152)
20. The urethane foam foam according to claim 19, wherein (158, 158) is arranged and hangs down, and a cushioning member (160) is interposed between each supporting member (158) and each corresponding heating plate (154). Roll manufacturing equipment. 21. The urethane foam roll manufacturing apparatus according to claim 20, wherein the heating plate (154) uses an electric heater as a heating source, and a compression spring is used as the buffer member (160). 22. The tape winding mechanism, wherein the tape peeling mechanism (22) is rotatably provided at a fixed position in the downstream side of the tape feeding mechanism (18) and close to the circulation path of the roll molding die (12).
(168) and a rotation drive mechanism for winding the tape by rotating the tape winding body (168) intermittently at a required timing.
An apparatus for producing a urethane foam roll according to claim 1, which comprises (170). 23. The round bar-shaped core (4) concentrically inserted and arranged in the cylindrical cavity (30) of the roll forming die (12).
The core removal device (176) provided at a fixed position immediately upstream of the roll demolding station (24) and close to the circulation path of the roll molding die (12) is used to extract the (0). Equipment for manufacturing urethane foam rolls. 24. The core removing device (176) includes a grip mechanism (180) for opening and closing a common base (50) provided with the round bar-shaped core (40), and the core (50). 40) from the roll forming mold (12) by a sufficient distance to the grip mechanism
Grip lifting mechanism (182) that raises and lowers (180)
24. The urethane foam roll according to claim 23, further comprising: and a grip moving mechanism (184) for moving the grip mechanism (180) from the extraction position of the core (40) to the release position of the core (40). Manufacturing equipment. 25. A core accumulating station (202) is provided adjacent to the core removing device (176), and the core extracted from the roll forming die (12) by the grip mechanism (180). 25. The apparatus for manufacturing a urethane foam roll according to claim 24, wherein the (40) is transferred to the core accumulating station (202) and sequentially accumulated. 26. A mold cooling mechanism such as, for example, a blower fan, at an appropriate position in the circulation path of the roll forming mold (12).
The apparatus for producing a urethane foam roll according to claim 1, wherein (206) is provided. 27. The urethane foam roll according to claim 1, wherein a mold temperature detection unit (208) including, for example, a temperature sensor is arranged at an appropriate position in the circulation path of the roll molding mold (12). Manufacturing equipment.