JP4756141B2 - Raw material injection equipment for foamed urethane roll production - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a raw material injection apparatus suitably used for a manufacturing apparatus for forming a urethane raw material produced by mechanical flossing (mechanical stirring) into a roll shape.
[0002]
[Prior art]
Components such as a transfer roller or an electrostatic roller are disposed in a copying machine, a fax, or other office equipment. This roller is obtained by forming a highly functional urethane having a so-called microcell structure into a roll having a required length, and a shaft body as a rotation support member is coaxially inserted and disposed therein. When forming a roll body, a so-called mechanical floss is generally used in which a desired foam is produced by mixing an inert foam-forming gas such as nitrogen without adding water or a foaming material to the raw material. (Mechanical stirring) is preferably employed. The foam obtained by adopting this mechanical floss has the advantage that the size of the bubbles contained therein is uniformly and uniformly dispersed, and the anisotropy of the shape is small. For this reason, when the foam is formed into a roll and the shaft is inserted into a roller to form a roller, the pressing force on the peripheral surface that comes into contact with the object to be conveyed is constant, so that the thin object to be conveyed ( In this case, it can be made suitable for reliably feeding the printing paper).
[0003]
However, when the foam is formed by the mechanical floss, a urethane raw material obtained by mixing the foaming gas and the raw material is poured into a mold in which a cavity is formed in the shape of the product to be obtained. As shown in FIG. 17, the mold 216 in this case includes a pair of mold halves 222 in which each cavity half 220 defining a plurality of independent cavities 218 is recessed in parallel on the contact surface. The plurality of molds 216 are arranged in parallel along the transport line. In addition, a hole 224 for injecting the urethane raw material is opened at a predetermined position of the mold 216 so as to be in spatial communication with the cavity 218. Furthermore, each cavity half body 220 is formed with a groove 226 having a semicircular cross section extending from a position corresponding to both end portions of the roll body which is a molded product to each end portion of the mold half 222, When the mold 216 is opened, the core 228 is attached through the groove 226.
[0004]
When molding the foam, the mold half 216 of the mold 216 is rotated at a predetermined position on the conveying line to open the cavity half 220. In this state, the core 228 is attached to each cavity half 220 of the mold half 222 through the groove 226. The core 228 itself is set to an outer diameter dimension that is the same diameter as a shaft that is concentrically inserted and disposed in the roll body that is a molded product, and is set to a dimension that is sufficiently longer than the formation length of the roll body. When the rod-shaped member is installed in the groove 226, a sufficient molding space is defined between the inner surface and the inner surface of the cavity half body 220 in alignment with the axial center of the cavity half body 220. Then, the molding die 216 fitted with the core 228 is closed by rotating one of the mold halves 222, and is moved to the downstream side along the transport line by, for example, one block. As a result, another mold 216 that has been positioned on the upstream side is transported to the downstream side. When the mold 216 arrives at the open position, one mold half 222 is moved in the same manner as the previous mold 216. The core 228 is attached to each cavity 218 by opening. Then, by repeating this procedure, the mold 216 is sequentially transferred to the downstream side along the transfer line.
[0005]
The molding die 216 transported downstream from the position where the core 228 is mounted is inserted through the hole 224 while the core 228 is mounted on the molding die 216 located on the upstream side. Urethane raw material is injected. Then, the molding die 216 into which the raw material has been injected is heated in a heating furnace 230 disposed on the downstream side of the transport line. As shown in FIG. 18, the heating furnace 230 is a tunnel having a required length formed along the conveyance line, and is controlled so that the heating temperature inside thereof is maintained at around 150 degrees. The molding die 216 into which the urethane raw material has been injected 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 mold 216 transferred to the downstream side is opened, both ends of the core 228 are detached from the grooves 226, and the urethane foam roll 229, which is a molded product, is removed from the cavity half. The molded product is obtained by separating from the body 220 and pulling out the core 228 from the foamed urethane roll 229.
[0006]
[Problems to be solved by the invention]
As described above, according to the process of manufacturing the urethane foam roll 229, the roll-shaped urethane foam roll 229 is obtained by curing the urethane raw material inside the cavity 218. However, in the manufacturing process, the urethane material is injected into the mold 216 equipped with the core 228 with the injection hole such as an injection hose aligned with the hole 224, and the plug member is formed after the injection is completed. This closes the hole 224. For this reason, skill is required to inject the urethane raw material quantitatively, and there is a problem that much labor is required to close each hole 224.
[0007]
OBJECT OF THE INVENTION
In view of the above-mentioned problems inherent in the prior art described above, the present invention has been proposed to suitably solve this problem, and the manufacturing process is systematized to minimize the process involving the operator. To provide a raw material injection device for manufacturing a urethane foam roll that can improve the manufacturing efficiency and work safety, and improve the manufacturing process so that the urethane raw material can be cured well in an appropriate state. With the goal.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems and to achieve the intended purpose, the raw material injection apparatus for producing a urethane foam roll according to the present invention comprises two mold halves that can be freely opened and closed. A roll molding die with a cavity for molding foamed urethane rolls formed inside, and an injection hole that allows injection of urethane raw material into a cylindrical cavity defined when the mold is clamped. When,
A plurality of the roll forming dies are arranged at a required interval, and a die feeding mechanism that makes an intermittent feed at each required interval and circulates a predetermined path endlessly;
Raw material injection that is provided at a fixed position close to the circulation path of the roll molding die, can be moved to and away from the molding die that has stopped at this fixed position, and can reciprocate by a required distance along the rotation path A nozzle is provided, and the injection nozzle is brought into contact with the injection hole of the molding die being stopped, and a raw material injection mechanism for injecting the urethane raw material into the cylindrical cavity is characterized.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, a raw material injection apparatus for producing a foamed urethane roll according to the present invention will be described below with reference to the accompanying drawings with a preferred embodiment. In addition, about the member same as the member already shown by the prior art, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
[0010]
[Overall structure of urethane foam roll manufacturing equipment]
As shown in FIGS. 1 to 3, a foamed urethane roll manufacturing apparatus 10 according to an embodiment includes a plurality of roll forming dies 12 and a mold feeding mechanism 14 in which a plurality of the dies 12 are arranged at a required interval. A raw material injection mechanism 16 provided at a fixed position close to the circulation path of the roll mold 12, a tape supply mechanism 18 disposed immediately downstream of the raw material injection mechanism 16, and downstream of the raw material injection mechanism 16. A mold heating means 20 disposed on the side, a tape peeling mechanism 22 provided on the downstream side of the tape supply mechanism 18, and a roll demolding station 24 disposed on the downstream side of the tape peeling mechanism 22. Basically composed.
[0011]
[About roll molds]
As shown in FIGS. 4 and 5, the roll molding die 12 is composed of two mold halves 26 configured to be openable and closable, and a cavity half 28 for molding a urethane foam roll is recessed in each of them. Thus, a cylindrical cavity 30 is defined when the mold is clamped, and is disposed on a circular turntable 32 (to be described later [0016]) constituting the mold feeding mechanism 14. That is, as shown in FIG. 2, a plurality of brackets 34 are arranged upright at the peripheral edge of the turntable 32 at a required interval along the circumferential direction. At the upper end of each bracket 34, an upper end portion of an L-shaped arm 36 is pivotally supported, and the lower end portion of the L-shaped arm 36 (described later [0035]) extends in the horizontal direction. A roll molding die 12 is erected and fixed to the open end where it comes out. A rod-shaped member 38 having a required length is disposed in the horizontal direction on the back side of the L-shaped arm 36 (the side close to the center of the turntable 32).
[0012]
As shown in FIG. 4, eight cylindrical cavities 30 of the roll molding die 12 are provided in parallel at a required interval on the roll molding die 12, and a core 40 (described later) formed into a round bar shape. [0015]) is detachably set with its axial center aligned with the cavity 30. The roll molding die 12 has an injection hole 42 in one mold half 26 that allows the urethane raw material to be injected into the cylindrical cavity 30. That is, as shown in FIG. 5, the injection hole 42 is a portion 44 (hereinafter referred to as a recessed portion) in which the lower end portion of the mold half 26 located outside the turntable 32 is recessed radially inward from the surface side. In the middle position of adjacent cavities 30. The urethane raw material referred to here is just before being injected into the cylindrical cavity 30 of the roll molding die 12, and as described in the prior art, a gas such as an inert gas (foaming gas). Can be obtained by a mechanical flossing method in which is mixed into a foam raw material and mechanically stirred.
[0013]
Each injection hole 42 and the cavity half 28 are communicated with each other through grooves 46, 46 extending from the injection hole 42 to the left and right. Accordingly, since eight cavity halves 28 are formed in the mold half 26, four injection holes 42 are formed with respect to the recessed portion 44. When the urethane raw material is injected into the injection hole 42, it is distributed and supplied to the left and right cylindrical cavities 30 through the grooves 46. Further, as shown in FIG. 4, a support hole 31 is formed at the lower end of each cavity half 28, and the lower end of a core 40 (described later [0015]) is engaged. Further, the outer surface of the recessed portion 44 is curved so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32. Of course, the number of cavity halves 26 is not limited to eight, and other than this, for example, six, four, or ten or more may be used. Further, as shown in FIGS. 1 and 10, a connecting member 45 is disposed in a space where the roll forming dies 12 are separated from each other at a position aligned with the recessed portion 44 in the horizontal direction. ([0049]), which is functional. Further, the recessed portion 44 is not limited to curve forming, and may be configured linearly along the tangential direction of the table 32, for example.
[0014]
Each mold half 26 is formed with a plurality of recesses 48 as shown in FIG. That is, the recess 48 has a horizontally long rectangular shape and is recessed at the shallow bottom from the outer surface of the mold half 26, and is formed at three locations along the height direction of the mold half 26. Has been. 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 way, the weight of the mold half 26 can be reduced and the durability can be improved. Further, the mold half 26 is configured to be engaged with each recess 48 by a heating plate 154 (to be described later [0031]) formed in a corresponding shape and thereby heated to a predetermined temperature. However, by forming the recess 48 in this way, it is possible to contribute to the improvement of the thermal efficiency for the mold half 26.
[0015]
As shown in FIG. 4, the core 40 is a member made slightly longer than the cylindrical cavity 30 (cavity half body 28), and is formed on a common base 50 located on one end side thereof. On the other hand, the same number of cylindrical cavities 30 are implanted in a comb-teeth shape. Positioning pins 52 project from both ends of the common base 50 in parallel with the core 40. The positioning pins 52 are aligned with reference recesses 54 that are recessed at a fixed position of the roll molding die 12. By engaging the lower end portion of the core 40 with the support hole 31 formed in the lower end portion of the cavity 30, each core 40 can be set concentrically in the corresponding cylindrical cavity 30. ing. Further, in place of the core 46, a shaft 56 for a roller to be manufactured may be mounted in the cavity 28 as shown in FIG. That is, the roll shaft 56 is a single member having the same diameter as each of the round bars disposed 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 concentrically with the support hole 31 while being attached to the shaft 56. It is configured so that it can be set. In this way, if the shaft 56 is attached with the extension fixing members 57 and 52 at both ends, and the urethane raw material is supplied with the shaft 56 concentrically set in the cavity 30 by using the common base 50 side, A roller member in which the shaft 56 is inserted to be in a product state is obtained. After the curing is completed, the common base 50 is moved upward to be detached from the shaft 56, the mold half 26 is opened, and the cavity half 28 is taken out. A roll body can be obtained by detaching the other extension fixing member 57 from the shaft 56.
[0016]
[About mold feeding mechanism]
The mold feeding mechanism 14 in which a plurality of the roll molding dies 12 are arranged at a required interval is configured to be intermittently fed at each required interval and circulate endlessly on a predetermined path. That is, as shown in FIGS. 2 and 3, the mold feeding mechanism 14 is provided with the turntable 32 having a required diameter centered on a pivotal support 58 standing on the floor surface, and standing on the floor surface with a required central angle. And a plurality of rotation support portions 60 for rotatably supporting the turntable 32, a plurality of the roll forming dies 12 arranged at a required interval on the outer periphery of the turntable 32, and the turntable 32 being a roll forming metal. It is basically composed of an intermittent feeding section 62 that feeds and stops in one direction by a distance corresponding to the arrangement interval of the mold 12. The rotation support unit 60 is a rotation roller provided at eight positions at equal intervals in the vicinity of the outer periphery of the turntable 32, and supports the bottom surface of the table 32.
[0017]
Further, as shown in FIGS. 1 and 7, the intermittent feed portion 62 is disposed at a fixed position facing the circuit path of the turntable 32, and a slider 64 that can reciprocate in the tangential direction of the table 32, and this A first drive source 66 that reciprocates the slider 64 in the tangential direction, a moving pin catcher 68 that is mounted on the slider 64 and can reciprocate in the radial direction of the turntable 32, and this moving pin catcher A second drive source 70 for reciprocally driving the tool 68 in the radial direction and a pin 72 provided on the turntable 32 corresponding to the respective roll molding dies 12 are provided.
[0018]
Among these, the slider 64 is a rectangular plate member disposed on a first support base 74 provided at a required length along the tangential direction of the turntable 32, It is mounted on a pair of rails 76 arranged in parallel on the upper surface and can move. On the upper surface of the slider 64, two guide members 78 substantially parallel to the radial direction of the turntable 32 are arranged in parallel near both end portions along the tangential direction of the table 32. The first drive source 66 for reciprocating the slider 64 is a ball screw 80 disposed along the extending direction of the first support base 74 and a drive source disposed at one end of the ball screw 80. The motor 82 is basically configured. A nut (not shown) is screwed into the ball screw 80, and the slider 64 is disposed on the top surface of the nut.
[0019]
Further, the moving pin catching tool 68 is a substantially triangular member disposed at the moving distal end portion of the guide member 78 and has a required width along the reciprocating direction of the guide member 78 from the apex portion thereof. A groove 68a is recessed. In addition, the second drive source 70 is disposed in a portion of the triangular bottom portion of the moving pin capturing tool 68. That is, the second drive source 70 is a so-called double acting cylinder 84, and the tip end portion of the rod 86 is connected to the moving pin catching tool 68. Further, the pins 72 are provided at positions corresponding to the respective roll molding dies 12. The pin 72 is a member set to a diameter that can be engaged with the groove 68a formed in the moving pin catching tool 68. As will be described later, the pin 72 is moved by driving the second drive source 70. The tool 68 is configured to move forward and backward with respect to the pin 72.
[0020]
Further, as shown in FIG. 7, a table lock mechanism 88 is disposed on the downstream side of the intermittent feeding portion 62. The table lock mechanism 88 includes a base 90 disposed at a fixed position facing the circulation path of the turntable 32, and a guide member 92 disposed on the upper surface of the base 90, similar to the intermittent feed portion 62. The fixing pin catching tool 94 that can be reciprocated while being guided in the radial direction of the turntable 32 via the guide, and a drive source 96 that reciprocates the fixing pin catching tool 94 in the radial direction. . The fixing pin catching tool 94 is a substantially triangular member disposed at the moving tip of the guide member 92 as described above, and has a required width along the reciprocating direction of the guide member 92 from the apex portion. The groove 94a is recessed. The drive source 96 is a double acting cylinder 98 connected to the triangular bottom, and the tip of the rod 100 is connected to a fixing pin catching tool 94. Therefore, after the turntable 32 is intermittently fed by a distance corresponding to the arrangement interval of the molding die 12, the timing immediately before the moving pin catching tool 68 of the intermittent feeding portion 62 is detached from the specific pin 72, The fixing pin catching tool 94 is moved in the radial direction via the drive source 96. Then, by capturing the pin 72 located downstream of the pin 72 from which the moving pin capturing tool 68 has been removed by the groove 94a, the turntable 32 is locked to prevent free rotation in the circumferential direction. It is configured.
[0021]
[About raw material injection mechanism]
As shown in FIGS. 1 and 8, the raw material injection mechanism 16 is disposed at a predetermined position of the turntable 32 constituting the mold feeding mechanism 14. The raw material injection mechanism 16 includes a raw material injection nozzle 104 that communicates with the storage tank 102 that supplies the urethane raw material, and an advance / retreat mechanism that moves the injection nozzle 104 forward and backward relative to the roll mold 12 that has stopped reaching a fixed position. 106 and a reciprocating slide mechanism 108 that can be reciprocated by a required distance in the lateral direction with the injection nozzle 104 in contact with the injection hole 42 in the molding die 12. Among these, the raw material injection nozzle 104 is placed on the second support base 110 disposed along the tangential direction of the turntable 32 and has at least two holes formed in the roll molding die 12. The horizontal dimension is set so that the injection hole 42 can be closed at the same time, and the nozzle hole 104a is formed at a substantially central portion of the block body (FIG. 12). The surface where the injection nozzle 104 abuts against the recessed portion 44 of the roll mold 12 is curved so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32 set to a required diameter. As described above, when the recessed portion 44 is configured linearly, the contact surface of the injection nozzle 104 is also necessarily configured linearly. Further, the second support base 110 is set so that the injection nozzle 104 is aligned in the horizontal direction with respect to the injection hole 42 and is integrally attached to a support rail 134 ([0026]) described later. It has been.
[0022]
Further, as shown in FIG. 8, the advance / retreat mechanism 106 is an actuator 112 installed on the upper surface of the second support base 110, and the raw material is provided at the tip of a rod 113 extending forward and backward from its main body. An injection nozzle 104 is provided. Then, the actuator 112 is activated and the rod 113 is moved in the direction along the radial direction of the turntable 32 so that the raw material injection nozzle 104 comes into contact with the injection hole 42 of the roll molding die 12. Yes.
[0023]
Further, the third support base 114 installed on the downstream side of the second support base 110 has a raw material injection nozzle 104 brought into contact with the injection hole 42 of the roll molding die 12 along the tangential direction of the turntable 32. The reciprocating slide mechanism 108 that can be reciprocated by a required distance is provided. That is, as shown in FIG. 8, the reciprocating slide mechanism 108 includes a ball screw 118 disposed on a portion located outside the portion on which the third support base 114 is disposed, and one end of the ball screw 118. It is comprised with the rotational drive sources 120, such as an installed motor. Of these, a nut (not shown) is screwed into the ball screw 118. The nut is integrally provided with a plate member 124 having a protrusion 122 on its upper surface, and a hooking piece 126 is hooked on the protrusion 122.
[0024]
As shown in FIG. 8, the latching piece 126 protrudes outward in the radial direction of the turntable 32 at a required position of the support rail 134 (described later [0026]) and allows the insertion of the projection 122. Is a member formed with a required length, and a protrusion 122 is interposed in the long hole 126a. By starting the reciprocating slide mechanism 108 in this state, the latching piece 126 is moved in a predetermined direction via the plate member 124 and the protrusion 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 each injection hole 42 of the molding die 12 that is stopped, and the raw material injection nozzle 104 that has been injected is used. The reciprocating slide mechanism 108 can reciprocate along the tangential direction of the turntable 32.
[0025]
[Tape supply mechanism]
As shown in FIGS. 1 and 8, the tape supply mechanism 18 is disposed at a position adjacent to the raw material injection mechanism 16. The tape supply mechanism 18 is configured to be able to reciprocate by a required distance along the circulation path of the roll molding die 12 and forcibly contacts the injection hole 42 of the molding die 12. Thus, a long tape 128 (described later [0029]) that prevents the urethane raw material from flowing out from the injection hole 42 is fed out and supplied.
[0026]
In the tape supply mechanism 18, an endless belt 130 is disposed along the circulation path of the roll molding die 12 on the downstream side of the raw material injection mechanism 16. As shown in FIG. 8, the endless belt 130 includes a plurality of support rollers 132 disposed at predetermined intervals along the circumferential direction of the roll molding die 12 disposed on the turntable 32, and the support rollers. A member wound around a plurality of other support rollers 133 arranged at predetermined intervals on the radially outer side of the turntable 32 from the group, and is configured to be rotated and started via a drive source (not shown). Each support roller 132 and another support roller 133 are arranged on the support rail 134 formed with a curvature corresponding to the arrangement of the rollers in the vertically lower direction. That is, as shown in FIG. 8, the support rail 134 is a member set to a length of about 1/8 to 1/10 in the circumferential direction of the turntable 32, and is an upper surface of the third support base 114. In FIG. 4, the rollers are mounted on the upper peripheral end surfaces of a plurality of rollers 138 disposed at predetermined intervals along the extending path of the support rail 134.
[0027]
The tape supply mechanism 18 is provided with a belt slide mechanism 142 that reciprocally slides the endless belt 130 along the circulation path of the roll molding die 12 in synchronization with the reciprocating slide of the injection nozzle 104. . That is, the belt slide mechanism 142 is also used as the reciprocating slide mechanism 108 for reciprocatingly sliding the raw material injection nozzle 104. As shown in FIG. 8, the portion where the third support base 114 is disposed. And a rotational drive source 120 such as a motor disposed at one end of the ball screw 118.
[0028]
Further, a tape supply source 150 is disposed on the upstream side of the support rail 134. The tape supply source 150 is a roll body of the tape from which the long tape 128 is fed, and one end of the tape supply source 150 is interposed between the endless belt 130 and the roll mold 12 so that the endless belt 130 is turned. When the table 32 moves in the upstream direction in the circulation path, the table 32 is fed out from the tape supply source 150 accordingly. That is, the rotational drive source 120 of the reciprocating slide mechanism 108 (belt slide mechanism 142) is rotated and activated in one direction, and the support rail 134 together with the retaining piece 126 is predetermined on the roller 138 via the plate member 124 and the protrusion 122. By moving to the position, the long tape 128 is fed out 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.
[0029]
In addition, as the long tape 128, by absorbing and swelling a part of the urethane raw material leaked into the roll molding die 12, the sealing property of the injection hole 42 is secured by using the leaked urethane raw material itself as a sealing material. A material that can be easily closed in this state and can be easily peeled off from the molding die 12 after the raw material is cured, for example, a kraft tape is preferably used. That is, the long tape 128 has a so-called two-layer structure, the side contacting the concave portion 44 is a kraft tape, and a polyethylene coat is laminated on the side contacting the endless belt 130. Since this polyethylene coat is not impregnated with urethane, the endless belt 130 is suitably prevented from being inadvertently soiled. Further, the endless belt 130 and the tape supply source 150 in the tape supply mechanism 18 are configured in a detachable cassette type.
[0030]
[About mold heating means]
A mold heating means 20 is disposed on the downstream side of the raw material injection mechanism 16. That is, as shown in FIGS. 1 and 9, the mold heating means 20 is required to be disposed along the circulation path of the roll molding die 12 at an interval corresponding to the arrangement interval of the molding die 12. A plurality of stands 152, a pair of heating plates 154 disposed on the stand 152, and a drive mechanism 156 that moves the pair of heating plates 154 closer to or away from each other are basically configured.
[0031]
Among them, a pair of support members 158 are disposed on the stand 152 and hang down at positions where the roll molding die 12 is sandwiched in the radial direction. The support member 158 is a plate-like member that is formed to be vertically longer than the roll molding die 12, and corresponds to the concave portion 48 provided in the molding die 12 on the inner side surface facing each mold half 26. The three heating plates 154 are disposed at positions spaced apart from each other along the vertical direction. That is, the heating plate 154 is obtained by arranging an electric heater as a heating source on a plate material having a required thickness formed so as to be able to engage with the concave portion 48. As shown in FIGS. 9 and 10, for example, It is disposed on the support member 158 via a buffer member 160 using a compression spring or the like and a mounting stay 161 disposed on the open end thereof. In addition, it is comprised so that the heat conductivity with respect to the metal mold | die half body 26 may be raised by inserting the heat insulating material (for example, gypsum board) which is not shown in figure between the heating plate 154 and the attachment stay 161.
[0032]
The drive mechanism 156 for moving the support member 158 provided with the heating plate 154 close to and away from the roll forming die 12 includes a double acting cylinder 162 and a guide rail 164 provided at the upper end of the support member 158. It consists of and. As shown in FIG. 9, the double-acting cylinder 162 is installed in the horizontal direction with respect to both support members 158, and is arranged in parallel with the double-acting cylinder 162 by moving its rod 166 so as to be able to advance and retract. The support member 158 is configured to approach and separate from the roll molding die 12 along the guide rail 164. The support member 158 is provided with three heating plates 154. Of the plurality of support members 158, for example, the support member 158 provided on the downstream side of the heating plate 154 includes Two are arranged. Thereby, it is comprised so that the temperature of the roll molding die 12 can be adjusted and the cure speed of a urethane raw material can be adjusted. Further, two or four or more heating plates 154 may be arranged for one support member 158. Further, as in this embodiment, even if the vertical dimension of the support member 158 is set to a length that allows the three heating plates 154 to be arranged, all the heating plates 154 are arranged in accordance with the type of raw material. It is not necessary to arrange.
[0033]
[Tape peeling mechanism]
As shown in FIG. 1, a tape peeling mechanism 22 is disposed at a fixed position downstream of the tape supply mechanism 18 and close to the circulation path of the roll molding die 12. That is, the tape peeling mechanism 22 includes a tape winding body 168 that is rotatably provided at the fixed position, and a rotation driving mechanism 170 that rotates the tape winding body 168 intermittently at a required timing to wind the tape. It basically consists of The tape winding body 168 is an assembly of a rectangular frame on the upper surface of a mounting table formed in a circular shape, and the above-described tape winding body 168 is arranged via the rotation driving mechanism 170 such as a motor disposed below the mounting table. By rotating the turntable 32 in a direction opposite to the circumferential direction of the turntable 32, the long tape 128 in contact with the injection hole 42 of the molding die 12 is separated from the injection hole 42.
[0034]
The tape peeling mechanism 22 is provided with a torque limiter (not shown). In the 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 carelessly broken. Similarly, even when the turntable 32 stops from the rotating state, the tape winding body 168 is given a rotational driving force to pull the long tape 128 to prevent the tape 128 from being broken. It is effective. Therefore, the torque limiter is operated so that the driving force from the rotary drive mechanism 170 can be continuously applied to the tape winding body 168 and the mechanism 170 can be prevented from being damaged before or after the turntable 32 is rotated. Thus, a so-called slip state can be generated.
[0035]
[About roll removal station]
As shown in FIG. 1, the molding die 12 is opened and molded into the cylindrical cavity 30 at a fixed position downstream from the tape peeling mechanism 22 and close to the circulation path of the roll molding die 12. A roll demolding station 24 for demolding the rod-shaped foamed urethane roll 229 from the cavity 28 is provided. That is, in the roll demolding station 24, the L-shaped arm 36 disposed along the outer periphery of the turntable 32 is swung at a required timing outward in the radial direction of the table 32.
[0036]
The L-shaped arm 36 is integrally provided with the bar-shaped member 38 in the vicinity of 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. Yes. A roller 172 is pivotally supported at the open end of the rod-shaped member 38 so as to be freely rotatable. As shown in FIG. 16, the roller 172 is disposed along the outer periphery of the turntable 32. By being pressed downward by 174, the lower end portion of the L-shaped arm 36 tilts away from the center of the turntable 32 in the radial direction around the pivotal support portion. This facilitates the working posture when the mold is opened with respect to the stopped roll molding mold 12 and facilitates the demolding of the foam molded product from the cavity half 28. Further, since the open surface of the mold half 26 is inclined, the core 40 can be easily set in the cavity half 28, and cleaning of the cavity half 28 can be simplified.
[0037]
[About the core removal device]
The round bar-shaped core 40 concentrically inserted and disposed in the cylindrical cavity 30 of the roll molding die 12 is immediately upstream of the roll demolding station 24 and close to the circulation path of the roll molding die 12. It is configured to be extracted by a core removal device 176 provided at a fixed position. That is, as shown in FIG. 11, the core removing device 176 is disposed on a support base 178 assembled in a bowl shape with a dimension sufficiently higher than that of the turntable 32. A grip mechanism 180 that opens and closes the common base 50 provided with the rod-shaped core 40, and raises and lowers the grip mechanism 180 by a distance sufficient to extract the core 40 from the roll molding die 12. The grip lift mechanism 182 and the grip moving mechanism 184 that moves the grip mechanism 180 from the extraction position of the core 40 to the release position of the core 40 are basically configured.
[0038]
Of these, as shown in FIG. 7, a horizontal beam 186 is installed on the upper end of the support base 178 in the horizontal direction along a direction substantially aligned with the radial direction of the turntable 32. A guide rail 188 is disposed in parallel on the upper surface of the horizontal rail 186, and a rectangular mounting base 190 on which the grip lifting mechanism 182 is disposed moves along the guide rail 188. It is mounted as possible. The grip elevating mechanism 182 is a double-acting cylinder 192 disposed in an inverted state with respect to the mounting base 190, and advances and retreats vertically downward from the cylinder body 194 through the mounting base 190. The grip mechanism 180 is disposed at the lower end of the rod.
[0039]
The grip mechanism 180 is composed of a pair of gripping pieces 196 arranged opposite to each other and a drive source 198 such as a known air torque actuator that moves the gripping pieces 196 close to and away from each other in an arc shape. The common base 50 provided on the core 40 is gripped by driving the source 198 to open and close the gripping piece 196. Further, the grip moving mechanism 184 is disposed at a position along the guide rail 188. As shown in the figure, the grip moving mechanism 184 is a ball screw 200 disposed along the guide rail 188, and a nut (not shown) screwed into the ball screw 200 includes the mounting base 190 described above. It is fixed to. Accordingly, by starting a drive source (not shown) disposed on one end of the ball screw 200 and moving the nut, as shown in FIG. A reciprocating movement is made between the extraction position of the core 40 and the release position of the core 40.
[0040]
Further, a core stacking station 202 is provided at a position adjacent to the core removing device 176. As shown in FIGS. 1 and 11, the core stacking station 202 includes a pair of support units arranged in parallel so that the grip elevating mechanism 182 is inclined downward at a slight angle from the vertically lower position where the grip lifting mechanism 182 is opened. The width of the rails 204 where the support rails 204 are separated from each other is such that the bars positioned at both ends of the core 40 are hooked to the rails 204 with the common base 50. Is set. The core 40 extracted from the roll molding die 12 by the grip mechanism 180 is transferred to the core stacking station 202 and sequentially stacked.
[0041]
A mold cooling mechanism 206 is disposed 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, for example, and is suitably disposed between the roll demolding station 24 and the raw material injection mechanism 16 as shown in FIG. As will be described later ([0057]), it functions. In addition, a mold temperature detection unit 208 made of, for example, a temperature sensor is disposed at a location further downstream from the cooling mechanism 206, and the temperature sensor is disposed on the mold half 26 of the roll molding mold 12. Is configured to indirectly measure the internal temperature by abutting from the outer surface.
[0042]
Further, as shown in FIG. 1, a preheating mechanism 210 is disposed between the mold heating means 20 and the core removing device 176. The preheating mechanism 210 is a mechanism configured substantially the same as the mold heating means 20. That is, the preheating mechanism 210 has a required number (two in the embodiment) of heating plates 154 arranged at intervals corresponding to the arrangement intervals of the molding dies 12 along the circulation path of the roll molding dies 12. In this case, the heating plate 154 is moved close to or away from the roll forming die 12 via the drive mechanism 156 similar to the die heating means 20.
[0043]
[Effect of the embodiment]
Next, the operation of the raw material injection apparatus for producing the urethane foam roll according to the above-described embodiment will be described. The turntable 32 on which the roll molding die 12 is disposed is intermittently fed at every required interval by the die feeding mechanism 14. That is, when intermittent feeding is performed, as shown in FIG. 7, the moving pin catching tool 68 of the intermittent feeding portion 62 is advanced in the radial direction of the turntable 32, and is stopped by the moving pin catching tool 68. A specific pin 72 on the turntable 32 is captured. Thereafter, by moving the slider 64 forward in the tangential direction of the table 32, the turntable 32 is moved at a distance corresponding to the arrangement interval of the roll molding die 12 via the moving pin catching tool 68 and the pin 72. Only intermittent feed.
[0044]
At the timing immediately before the intermittent feeding is finished and the moving pin catcher 68 is detached from the specific pin 72, the fixing pin catcher 94 arranged in the table lock mechanism 88 is aligned in the radial direction. Advance to pin 72 and capture. Thereby, the turntable 32 is supported and fixed so as not to rotate. Further, the moving pin catching tool 68 of the intermittent feeding portion 62 is retracted along the radial direction as it is, and after being detached from the specific pin 72, the slider 64 is retracted in the tangential direction to return to the original position. To wait for the next intermittent feed.
[0045]
As the turntable 32 is intermittently fed in this way, the roll molding dies 12 disposed on the outer periphery thereof sequentially come toward the raw material injection mechanism 16. In the raw material injection mechanism 16, the raw material injection nozzle 104 connected to the advance / retreat mechanism 106 advances into the roll molding die 12 that has arrived at a fixed position and has stopped intermittent feeding. The nozzle 104 that has advanced has a nozzle hole 104a provided in a substantially central portion of the block body, out of the injection holes 42 formed in the molding die 12, as shown in FIGS. 12 (a) and 12 (b). By first contacting the injection hole 42 located on the most downstream side of the turntable 32 in the circumferential direction, the turntable 32 communicates spatially. The long belt 128 is wound around the endless belt 130 of the tape supply mechanism 18 disposed immediately downstream of the raw material injection nozzle 104 with the polyethylene coat side in contact therewith, and a slight gap is provided. Are close together.
[0046]
In this state, urethane raw material is injected into the cavity 28 from the storage tank 102 through the injection nozzle 104. After the injection into the injection hole 42 located at the most downstream end, the raw material injection nozzle 104 moves to the adjacent upstream injection hole 42 via the front reciprocating slide mechanism 108 (belt slide mechanism 142). At this time, the upstream end portion of the endless belt 130 follows the raw material injection nozzle 104 and moves upstream while maintaining the original gap, and at the same time, is wound around the upstream end portion of the endless belt 130. The long tape 128 is fed from the tape supply source 150, and the injection holes 42 are sequentially closed immediately after the injection of the urethane raw material is completed. As shown in FIGS. 13A and 13B, when the injection nozzle 104 moves into the injection hole 42 located on the most upstream side and the urethane raw material is injected, the three injections on the downstream side are injected. The hole 42 is closed by the long tape 128.
[0047]
At this time, the concave portion 44 of the molding die 12 in which the injection hole 42 is provided is curved and shaped to substantially match the curve drawn by the outer peripheral surface of the turntable 32 as described above, and the raw material injection nozzle 104 is The surface portion that comes into contact with the recessed portion 44 is also curved so as to substantially match the curve drawn by the outer peripheral surface of the turntable 32. Therefore, when the urethane raw material is injected, the nozzle hole 104a of the injection nozzle 104 is in close contact with the injection hole 42, so that there is almost no leakage of the raw material. Moreover, the block body that becomes the injection nozzle 104 is set to a lateral dimension that can simultaneously block at least two of the injection holes 42. For this reason, when the injection nozzle 104 intermittently moves upstream 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 immediately downstream side is also provided. However, since the close contact state is satisfactorily maintained by the nozzle 104, leakage of the urethane raw material is suppressed to a minimum until immediately before being blocked by the long tape 128. When the recessed portion 44 is formed linearly, the 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.
[0048]
The urethane raw material tends to leak outside even after being blocked by the long tape 128. However, as described above, the long tape 128 is preferably a kraft tape that absorbs a part of the leaked urethane raw material and swells so that the leaked urethane raw material itself ensures the sealing performance of the injection hole 42. in use. That is, rather than forcibly preventing leakage, rather than leaking a part of the raw material and using this as a stopper, leakage of the urethane raw material is well and easily prevented, After the raw material is cured, it can be easily peeled off from the molding die 12.
[0049]
After the injection of the urethane raw material into the injection hole 42 on the uppermost stream side is completed, the roll molding die 12 that has been in an intermittently stopped state until the injection is completed as shown in FIGS. 14 (a) and 14 (b). It is intermittently fed downstream by a predetermined distance in accordance with the timing. The raw material injection nozzle 104 itself moves to the downstream side integrally with the molding die 12 with the nozzle hole 104 a aligned with the injection hole 42. Immediately before the molding die 12 located on the upstream side arrives at the fixed position (that is, the intermittent feeding is finished), as shown in FIGS. 15A and 15B, the most upstream of the molding die 12 on the downstream side. It moves from the position aligned with the injection hole 42 located on the side toward the injection hole 42 on the most downstream side of the molding die 12 located on the upstream side. At this time, since the raw material injection nozzle 104 moves while being in contact with the connecting member 45, leakage of the urethane raw material from the nozzle 104 is minimized. The uppermost injection hole 42 of the downstream molding die 12 is closed by the long tape 128, and the raw material injection nozzle 104 is inserted into the injection hole 42 of the roll molding die 12 newly arrived at a fixed position. Align.
[0050]
The urethane raw material injected from each injection hole 42 is supplied to each cylindrical cavity 30 described above via the groove 46 communicating with the injection hole 42. As shown in FIG. 9, the roll molding die 12 in which the raw material is injected into each cylindrical cavity 30 moves to the mold heating means 20 disposed on the downstream side of the raw material injection mechanism 16. In the mold heating means 20, the drive mechanism 156 is sequentially operated at the timing when the roll molding mold 12 intermittently stops at a fixed position of the stand 152. That is, in this case, the double-acting cylinder 162 is actuated to move the rod 166 in a direction to be accommodated in the cylinder body. As a result, the pair of support members 158 arranged with the roll molding die 12 interposed therebetween are moved in the direction approaching the molding die 12 while being guided by the guide rail 164. When the support member 158 completes its movement, the plurality of heating plates 154 disposed on the support member 158 engage with the recesses 48 formed in the molding die 12.
[0051]
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 roll forming die 12 is heated to a predetermined temperature by bringing the heating plate 154 heated to a predetermined temperature into contact with the recess 48. At this time, the heating plate 154 is brought into contact with the support member 158 while being urged at a required pressure by a buffer member 160 such as a compression spring, etc. And the urethane raw material injected into the cylindrical cavity 30 is cured by holding and heating the heating plate 154 from both sides for the stop time of the molding die 12. Thereafter, when the required heating time has elapsed, the drive mechanism 156 is reversely operated to open the pair of heating plates 154. In addition, by arranging the support member 158 with the number of the heating plates 154 reduced, the temperature of the roll molding die 12 is adjusted and the curing speed of the urethane raw material is adjusted as described above.
[0052]
The mold 12, which is being cured by the mold heating means 20, reaches the tape peeling mechanism 22 by intermittently moving around the half of the table 32. In the peeling mechanism 22, the tape winding body in which a long tape 128 disposed in the recessed portion 44 of the molding die 12 and closing the injection hole 42 is driven via the rotation driving mechanism 170. It is peeled off by 168. It should be noted that the long tape 128 is cut at an appropriate position when the winding operation has progressed to some extent, removed from the tape winding body 168, and then discarded.
[0053]
The roll forming mold 12 in which the curing is completed in the cavity 28 and the long tape 128 is peeled off by the tape peeling mechanism 22 arrives at the core punching device 176 located immediately downstream. In this core removal device 176, as shown in FIG. 11, the grip lifting mechanism 182 and the lower part thereof are disposed via the grip moving mechanism 184 disposed on the horizontal rail 186 of the support base 178. The grip mechanism 180 arrives vertically above the rotation path of the roll molding die 12. Then, the intermittently fed roll molding 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 energizing the double-acting cylinder 192 constituting the grip mechanism 180, a rod extending downward from the cylinder main body 194 is protruded so that the grip mechanism 180 is disposed on the common base 50 of the core 40. Let it face from above. The grip mechanism 180 adjacent to the common base 50 grips the gripping piece 196 by opening the gripping piece 196 via the driving source 198 and then closing the gripping piece 196 at a position where the common base 50 is reached.
[0054]
The grip mechanism 180 that holds the common base 50 is moved upward by the grip lifting mechanism 182 as shown in FIG. At this time, the upward movement of the foam molded product cured in the cylindrical cavity 30 of the roll molding die 12 is restricted by the portion formed in the groove 46 formed in the lower end portion of the cavity 30. . For this reason, the core 40 is forcibly moved upward with respect to the roll mold 12 so that only the foamed molded product remains in the cylindrical cavity 30. Further, the lower end of the core 40 is lifted to a position at which the lower end portion is completely removed from the molding die 12, and the grip moving mechanism 184 vertically above the upstream end in the core stacking station 202, that is, the release of the core 40. It is conveyed to the position. At this time, the core 40 is rotated 90 degrees from the state in which the grip mechanism 180 is detached from the roll mold 12, and is aligned with the extending direction of the support rails 204 constituting the stacking station 202. Thereafter, when the grip mechanism 180 is released, as described above, the grip mechanism 180 is transferred to the core stacking station 202 and sequentially stacked.
[0055]
The roll forming die 12 that has passed through the tape peeling mechanism 22 and has reached the core removal device 176 has the core 40 removed by the core removal device 176 in a state where the heating temperature hardly decreases. Then, after the foamed urethane roll 229 is detached 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, the curing of the urethane raw material in the subsequent process is adversely affected as described in the prior art. For this reason, the core 40 detached from the molding die 12 is time-adjusted so that the number of stacks at the core stacking station 202 becomes small, so that the molding die is released again after being detached from the molding die 12. The so-called tact time set in the mold 12 is shortened as much as possible. As a result, the temperature drop of the core 40 is suppressed, the total energy loss is reduced, and the temperature difference due to the portion in the molding die 12 at the time of injecting the urethane raw material is reduced. Moreover, at the beginning of the start-up of the urethane roll manufacturing apparatus 10, the temperature of the roll molding die 12 and the core 40 has not reached a temperature suitable for curing the urethane raw material. For this reason, after all the cores 40 have been mounted on the roll molding die 12 disposed on the turntable 32, the table 32 is operated so-called in the order of two to three rounds, during which the mold heating means 20 is moved. The temperature of each molding die 12 and the core 40 is raised to a temperature suitable for curing the urethane raw material.
[0056]
The roll molding die 12 from which the core 40 has been extracted moves to the roll demolding station 24 disposed on the downstream side of the core punching device 176. In the roll demolding station 24, as shown in FIG. 16, the pressing member 174 disposed along the outer periphery of the turntable 32 is provided with the L-shaped arm disposed along the outer periphery of the turntable 32. 36 is pressed outward in the radial direction of the table 32 at a required timing. That is, in this pressing, the roller 172 disposed at the tip of the rod-shaped member 38 of the L-shaped arm 36 is pressed downward from above by the pressing member 174, whereby the rod-shaped member 38 and the L-shaped arm 38 are pressed. It is swung via the arm 36. As described above, the roll forming mold 12 being stopped is tilted toward the front side to facilitate the working posture when the mold is opened. Further, after the mold release at the roll release station 24 is completed, the core 40 is set again. In this case, since the roll molding die 12 is tilted, the core 40 can be easily attached to the cavity half 28, and the core 40 is preferably prevented from falling off.
[0057]
The molding die 12 is cooled to a predetermined temperature as needed by the die cooling mechanism 206 disposed downstream from the roll demolding station 24. As a case to be cooled, it is a section that is suitably used when heated to a temperature higher than the proper curing temperature of the urethane raw material used in the manufacturing process, or when the composition of the urethane raw material used is changed It is. Further, whether or not this temperature is an appropriate temperature is measured by the mold temperature detection unit 208 disposed further downstream of the mold cooling mechanism 206. Further, the roll forming mold 12 may be heated by the preliminary heating mechanism 210 during the period from the mold heating means 20 to the core removal 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 at the mold heating means 20 disposed immediately downstream thereof is not sufficient. To start.
[0058]
【The invention's effect】
As described above, in the invention according to claim 1, the raw material injection is performed so that a plurality of roll forming dies arranged at a required interval can be reciprocated by a required distance along the movement path. A nozzle is provided. For this reason, it is possible to quantitatively inject the urethane raw material into the cavity without the manual operation of the operator.
[0059]
In the invention according to claims 2 to 4, in the foamed urethane roll manufacturing apparatus according to claim 1, a nozzle hole is opened in the raw material injection nozzle, and the injection nozzle is moved by an advance / retreat mechanism and a reciprocating slide mechanism. As a result, it is possible to automatically align with the injection hole, thereby eliminating the labor of the operator.
[Brief description of the drawings]
FIG. 1 is an overall plan view showing a raw material injection apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 2 is an overall side view showing a raw material injection apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a front view showing a roll molding die and a core in an open state in a raw material injection apparatus for producing 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 raw material injecting apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention, showing a state in which a core is mounted on a roll molding die.
FIG. 6 is a perspective view showing a roll shaft mounted on a roll molding die in a raw material injection apparatus for producing a foamed urethane roll according to a preferred embodiment of the present invention.
FIG. 7 is a main part plan view showing an intermittent feeding unit and a core removal device in a raw material injection device for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 8 is a main part plan view showing a raw material injection mechanism and a tape supply mechanism in a raw material injection apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 9 is a side view showing a main part of a mold heating means in a raw material injection apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 10 is a main part front view showing a mold heating means in the raw material injection apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 11 is a front view showing a core removal device and a core accumulation station in a raw material injection device for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 12 is a first operation diagram showing a state in which a urethane raw material is injected into a roll molding die in the raw material injection apparatus for producing a foamed urethane roll according to a preferred embodiment of the present invention.
FIG. 13 is a second operation diagram showing a state in which a urethane raw material is injected into a roll molding die in a raw material injection apparatus for producing a foamed urethane roll according to a preferred embodiment of the present invention.
FIG. 14 is a third operation diagram showing a state in which a urethane raw material is injected into a roll molding die in the raw material injection apparatus for producing a foamed urethane roll according to a preferred embodiment of the present invention.
FIG. 15 is a fourth operation diagram showing a state in which a urethane raw material is injected into a roll molding die in the raw material injection apparatus for producing a urethane foam roll according to a preferred embodiment of the present invention.
FIG. 16 is a main part side view showing a state in which a roll molding die is tilted via an L-shaped arm in a raw material injection apparatus for producing a foamed urethane roll according to a preferred embodiment of the present invention.
FIGS. 17A and 17B show roll molding dies used for curing urethane raw materials in the production of urethane foam rolls according to the prior art, wherein FIG. 17A is a plan view and FIG. 17B is a longitudinal side view.
FIG. 18 is a configuration diagram schematically showing a manufacturing process of a roll mold in which a urethane raw material is injected in manufacturing a urethane foam roll according to the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 12 Roll molding die 104 Raw material injection | pouring nozzle 16 Raw material injection | pouring mechanism 104a Nozzle hole 26 Mold half body 106 Advance / retreat mechanism 30 Cylindrical cavity 108 Reciprocating slide mechanism 42 Injection hole 102 Storage tank

Claims (4)

It consists of two mold halves (26, 26) that can be freely opened and closed. Inside each mold half (26), a cavity (28) for forming urethane foam rolls is recessed, which is defined during mold clamping. A roll mold (12) in which one mold half (26) has an injection hole (42) that allows urethane raw material to be injected into the cylindrical cavity (30).
A plurality of the roll molding dies (12) are arranged at a required interval, and a die feeding mechanism (14) for making an endless lap around a predetermined path by intermittent feeding at each required interval;
Provided at a fixed position close to the circulation path of the roll molding die (12), can be contacted to and separated from the molding die (12) that has stopped coming to this fixed position, and only a required distance along the rotation path. A raw material injection nozzle (104) capable of reciprocating movement is provided, and the urethane raw material is brought into contact with the injection hole (42) of the molding die (12) that is stopped while the injection nozzle (104) is brought into contact with the cylindrical cavity (30). A raw material injection device for producing a urethane foam roll, characterized by comprising a raw material injection mechanism (16) for injecting into a urethane foam. The raw material injection mechanism (16) includes the raw material injection nozzle (104) communicating with a urethane raw material storage tank (102) and the injection nozzle (104) with respect to a roll molding die (12) stopped at a fixed position. And a reciprocating slide mechanism (106) for reciprocally sliding in the lateral direction with the injection nozzle (104) in contact with the injection hole (42) in the molding die (12). 108) The raw material injection device for producing a urethane foam roll according to claim 1. The injection nozzle (104) is composed of a block body having a lateral dimension capable of simultaneously closing at least two injection holes (42) drilled in the roll molding die (12), and is substantially at the center of the block body. 3. The raw material injection device for producing a urethane foam roll according to claim 1, wherein the nozzle hole (104a) is opened. 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. The raw material injection apparatus for foaming urethane roll manufacture as described in 2.

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