JP2009190341A - Transfer sheet feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the transfer sheet feeding device 1 which achieves high accuracy as to the registering of the transfer sheet 2 to the injection molding die 3 at the time when the pulling rollers 6 sandwich the transfer sheet 2 after the molding and simultaneous transfer and which does so every molding and simultaneous transfer. <P>SOLUTION: The transfer sheet feeding device 1 is so structured: that the transfer sheet take-up apparatus 5 is equipped with the take-up roller 50 which takes up the transfer sheet 2 with an applied tension in the terminal of the transfer sheet 2 and the pulling rollers 6 consisting of a pair of rollers which pass the transfer sheet 2 between the injection molding die 3 and the take-up roller 50 with applying a tension; and that, upon the registration of the transfer sheet 2, the position of the pulling rollers 6 can be adjusted so as for the pulling rollers 6 to always sandwich a predetermined portion of the transfer sheet 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for so-called simultaneous molding transfer that gives a pattern to the surface of a molded product simultaneously with injection molding. More specifically, the present invention relates to a transfer sheet feeding device that supplies a transfer sheet on which a pattern is printed into an injection mold.

  In a communication device such as a mobile phone, an information device inside a car, a home appliance, etc., there is a method of decorating using a transfer sheet in order to express metallic luster on the surface of a plastic molded product.

  As one of the methods for decorating the surface of the plastic molded article as described above, there is a simultaneous molding transfer method using a transfer sheet. The simultaneous molding transfer method is a method in which a transfer sheet formed with a release layer, a design layer, an adhesive layer, etc. on a long or single substrate sheet is sandwiched in an injection mold. The resin is injected and filled in and cooled to obtain a resin molded product. At the same time, the transfer sheet is deposited on the surface of the molded product, and then the base sheet is peeled off, and the transfer layer is transferred to the surface of the object to be transferred and decorated. It is a method to do. The molding simultaneous transfer method has a feature that a pattern can be formed even for a molded product having a shape in which it is difficult to directly form the pattern by printing.

  When the base sheet is long, a transfer sheet in which transfer layers are formed at regular intervals is used. In this case, in order to supply the position where the transfer layer is formed to a predetermined position of the injection mold. The positioning is performed by unwinding the transfer sheet from the long transfer sheet roll disposed above the injection mold, passing the surface of the injection mold and winding the transfer sheet below the injection mold. ). Further, at this time, in order to increase the positioning accuracy between the injection mold and the transfer sheet, the torque of the take-up roller and the pulling roller or the feeding roller and the pulling roller is controlled in the vertical direction of the transfer sheet. It is done so that tension acts. (For example, refer to Patent Document 1).

Japanese Utility Model Sho 61-297149

  However, when the transfer sheet and the molten resin are integrated by the above method, the transfer layer forming portion of the transfer sheet sandwiched in the injection mold is forcibly stretched to the shape of the injection mold by the molten resin. In the later transfer sheet, the portion where the transfer layer was not formed retains the original flat shape (hereinafter referred to as the transfer sheet flat portion), but the portion where the transfer layer was formed is in the shape of an injection mold. A conforming three-dimensional shape (hereinafter referred to as a transfer sheet three-dimensional portion) is obtained. After the molding and transfer, when the transfer sheet is discharged from the injection mold and the transfer sheet solid portion of the transfer sheet is sandwiched between the tension rollers, the transfer sheet solid portion is crushed and wrinkles are generated in the transfer sheet. As a result, since tension acts also in the width direction of the transfer sheet, there is a problem that the positioning accuracy with respect to the injection mold is lowered. Furthermore, since the method of generating wrinkles changes every time the tension roller sandwiches the three-dimensional portion of the transfer sheet, there is a problem that the positioning accuracy of the transfer sheet with respect to the injection mold for each simultaneous molding transfer is lowered.

  Therefore, the present invention eliminates the above-mentioned drawbacks, and increases the positioning accuracy of the transfer sheet with respect to the injection mold when the transfer roller after the simultaneous molding transfer is sandwiched between the tension rollers. It is an object of the present invention to provide a transfer sheet feeding device that increases the positioning accuracy of a transfer sheet with respect to a mold for each transfer.

  In order to achieve the above object, the transfer sheet feeding apparatus of the present invention is configured as follows.

  That is, the transfer feeding device of the present invention includes a transfer sheet sending device that unwinds a transfer sheet wound in a roll shape and sends the transfer sheet to a parting surface of an injection mold, and a parting surface of the injection mold. A transfer sheet take-up device for taking up the transferred transfer sheet, and transferring the transfer sheet into the injection mold at regular intervals so as to perform simultaneous simultaneous transfer of molding and transfer. The sheet winding device includes a winding roller that winds the transfer sheet by applying tension at the end of the transfer sheet, and a pair of rollers that passes the transfer sheet by applying tension between the injection mold and the winding roller. It is possible to adjust the position of the tension roller so that the tension roller always pinches the specified part of the transfer sheet when aligning the transfer sheet. It was configured to.

  Also, as a second aspect of the present invention, a transfer sheet feeding device for unwinding a transfer sheet wound in a roll shape and feeding the transfer sheet to a parting surface of an injection mold, and passing through the parting surface of the injection mold A transfer sheet take-up device that winds up the transferred transfer sheet, and transfers the transfer sheet into the injection mold by aligning and feeding the transfer sheet at a constant interval to continuously transfer the molding simultaneously. A tensioner composed of a pair of rollers that passes the transfer sheet under tension between a winding roller that winds the transfer sheet under tension at the end of the transfer sheet, an injection mold, and the winding roller. A roller, and a path adjusting roller for adjusting the path length of the transfer sheet between the injection mold and the tension roller 6; La is configured such that the position of the path adjusting roller to sandwich always predetermined portion of the transfer sheet is adjustable.

  Further, as a third aspect of the present invention, there is provided a transfer sheet feeding device for unwinding a transfer sheet wound in a roll shape and feeding the transfer sheet to a parting surface of an injection mold, and a parting surface of the injection mold. A transfer sheet take-up device for taking up the transferred transfer sheet, and transferring the transfer sheet into the injection mold at regular intervals so as to perform simultaneous simultaneous transfer of molding and transfer. The sheet winding device includes a winding roller that winds the transfer sheet by applying tension at the end of the transfer sheet, and a pair of rollers that passes the transfer sheet by applying tension between the injection mold and the winding roller. A tension roller, and a plurality of path adjustment rollers for adjusting the path length of the transfer sheet between the injection mold and the tension roller 6 are provided. Transfer sheet any route adjusting roller to tension roller sandwiches always a predetermined portion of the transfer sheet was arranged to be passed.

  According to the transfer sheet feeding apparatus of the present invention, when the tension roller sandwiches the transfer sheet after simultaneous molding and transfer, the tension roller selectively sandwiches the flat portion of the transfer sheet. As a result, the positioning accuracy of the transfer sheet with respect to the injection mold and the positioning accuracy with respect to the injection mold for each simultaneous molding transfer are increased.

  Embodiments of the present invention will be described in detail with reference to the drawings. 1 is a side view of a transfer sheet feeding apparatus according to the first embodiment of the present invention, FIG. 2 is a front view of a transfer sheet used in the transfer sheet feeding apparatus of the present invention, and FIG. 3 is an injection mold during simultaneous molding transfer. 4 is a perspective view of the tension roller according to the transfer sheet feeding device of the first embodiment of the present invention, and FIG. 5 is a side view of the tension roller according to the transfer sheet feeding device of the first embodiment of the present invention. 6 is a side view of a transfer sheet feeding apparatus according to the second embodiment of the present invention, FIG. 7 is a side view of a path adjusting roller according to the transfer sheet feeding apparatus of the second embodiment of the present invention, and FIG. 9 is a side view of the transfer sheet feeding device according to the embodiment, and FIG. 9 is a side view of the turn roller according to the transfer sheet feeding device of the third embodiment of the present invention. In the figure, 1 is a transfer sheet feeding device, 2 is a transfer sheet, 3 is an injection mold, 4 is a transfer sheet feeding device, 5 is a transfer sheet winding device, 6 is a tension roller, 7 is a path adjusting roller, 8 Is a turn roller, 20 is a mark for positioning in the longitudinal direction, 21 is a pattern, 22 is a mark for positioning in the width direction, 23 is a base sheet, 24 is a release layer, 25 is a pattern layer, 26 is an adhesive layer, 30 is a fixed mold, 31 Is a movable type, 32 is a movable platen, 33 is a cavity space, 34 is a molten resin, 35 is a width direction positioning sensor, 36 is a longitudinal direction positioning sensor, 40 is a transfer sheet supply roll, 41 is a feed roller, 42 is a guide roller, 43 is a guide roller, 44 is a rotating shaft, 45 is a casing, 50 is a take-up roller, 51 is a guide roller, 52 is a guide roller, 53 is a casing, 60 is a pressing roller, and 61 is a drive roller. , 62 is an electric actuator, 63 is an electric cylinder, 64 is a long hole slit member, 65 is a bolt, 70 is a fixed roller, 71 is a movable roller, 72 is a long hole slit member, 80 is a turn roller, 81 is a turn roller, 82 Is a turn roller, 83 is a turn roller, 84 is a turn roller, 85 turn roller, 86 is a turn roller, 200 is a transfer layer, A is an arrow direction, B is a transfer sheet flow direction, C is a clamp, M is a servo motor, X Denotes a three-dimensional portion of the transfer sheet, and Y denotes a flat portion of the transfer sheet.

  A transfer sheet feeding device 1 according to the first embodiment of the present invention includes a transfer sheet feeding device 4 that unwinds a transfer sheet 2 wound in a roll shape and feeds the transfer sheet 2 to a parting surface of an injection mold 3. A transfer sheet take-up device 5 for taking up the transfer sheet 2 that has passed through the parting surface of the injection mold 3 and feeding the transfer sheet 2 into the injection mold 3 at regular intervals. In the transfer sheet feeding device 1 that performs simultaneous molding and transfer by the transfer sheet winding device 5, the transfer sheet winding device 5 takes up tension at the end of the transfer sheet 2 and winds up the transfer sheet 2 and the injection mold. 3 and a take-up roller 50, and a tension roller 6 composed of a pair of rollers that allow the transfer sheet 2 to pass through under tension. When the transfer sheet 2 is aligned, the tension roller 6 rotates. Position of the tension roller 6 to sandwich always predetermined portion of the seat 2 is configured to be adjusted (see FIG. 1).

  In FIG. 1, the transfer sheet feeding device 1 is mainly composed of a transfer sheet feeding device 4 and a transfer sheet winding device 5.

  First, the transfer sheet 2 used in the transfer sheet feeding apparatus 1 of the present invention will be described.

  The transfer sheet 2 is unwound by a certain length from the transfer sheet supply roll 40 and descends in the arrow direction A, and is taken up by the take-up roller 50 of the transfer sheet take-up device 5 via the tension roller 6. The transfer sheet 2 thus fed is subjected to a constant tension by torque control of the lower motor M1 and the tension roller 6 of the transfer sheet winding device 5 or the upper motor M2 and the tension roller 6 of the transfer sheet feeding device 4. ing.

  The transfer sheet 2 is a sheet that completely separates the base sheet from the molded product after the transfer, and is selected from those having heat resistance and deformable so as to conform to the shape of the molded product. In addition, when positioning accurately with respect to the parting surface of the movable mold 31, the longitudinal positioning mark 20 is printed on the transfer sheet 2 along the sheet longitudinal direction corresponding to the pattern 21 to be painted at predetermined intervals. The width direction positioning mark 22 has a constant width dimension at one end in the sheet width direction and is continuously printed in the longitudinal direction of the sheet from at least a detection start position to a detection end position by a width direction positioning sensor 35 described later. (See FIG. 2A).

  As a configuration of the transfer sheet 2, basically, a transfer layer comprising at least a release layer, a design layer, and an adhesive layer is formed on a base sheet in sequence (see FIG. 2B).

  The transfer layer 200 is a layer that is formed on a long base sheet at a predetermined interval and decorates a molded product at the time of simultaneous molding transfer. Further, at the time of simultaneous molding transfer, the portion of the transfer sheet 2 where the transfer layer is formed is a portion that is inserted into the mold and is forcibly stretched to the shape of the injection mold 3 by the molten resin. The latter part is a part that becomes the transfer sheet three-dimensional part X (see FIG. 2C). .

  The material of the base sheet 23 is a resin sheet such as polypropylene resin, polyethylene resin, polyamide resin, polyester resin, acrylic resin, polyvinyl chloride resin, metal foil such as aluminum foil or copper foil, glassine paper In addition, as a base sheet of a normal metal vapor deposition transfer sheet, such as a cellulose-based sheet such as coated paper or cellophane, or a composite of each of the above-described sheets can be used. Further, when the surface of the base sheet has fine irregularities, the irregularities are copied onto the transfer layer, and surface shapes such as matte and hairline can be expressed.

  In order to improve the peelability of the base sheet 23, a release layer may be provided between the base sheet 23 and the release layer (not shown).

  The release layer is a layer that is released from the transfer layer together with the base sheet 23 when the base sheet 23 is peeled after transfer or after simultaneous molding transfer. As the material of the release layer, melamine resin, silicone resin, fluorine resin, cellulose derivative, urea resin, polyolefin resin, paraffin resin, and composites thereof can be used. It is preferable that at least melamine resin is contained therein. This is because the melamine resin is a thermosetting resin with high heat resistance, and has an appropriate release property from the metal vapor deposition layer, and does not cause any physical or mechanical change. This is because it is possible to suppress whitening and discoloration of the metal vapor deposition layer. Examples of the method for forming the release layer include coating methods such as a roll coating method and a spray coating method, and printing methods such as a gravure printing method and a screen printing method.

  The release layer 24 is a layer that becomes the outermost surface of the transfer object after transfer, and is a layer that protects the design layer 25. The release layer 24 may be made of acrylic resin, polyester resin, polyvinyl chloride resin, cellulose resin, rubber resin, polyurethane resin, polyvinyl acetate resin, or vinyl chloride-vinyl acetate copolymer. Copolymers such as system resins and ethylene-vinyl acetate copolymer resins may be used. If the release layer 24 requires hardness, a photo-curing resin such as an ultraviolet curable resin, a radiation curable resin such as an electron beam curable resin, or a thermosetting resin may be selected and used. The release layer 24 may be colored or uncolored. Examples of the method for forming the release layer 24 include a coating method such as a gravure coating method, a roll coating method, a comma coating method, and a lip coating method, and a printing method such as a gravure printing method and a screen printing method.

  The design layer 25 is formed on the release layer 24. As a material of the pattern layer 25, a resin such as a polyvinyl resin, a polyamide resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, or an alkyd resin is used as a binder. Colored inks containing various color pigments or dyes as colorants may be used. In the case of forming a metal color, a pearl pigment in which titanium oxide is coated on metal particles such as aluminum, titanium, bronze, or mica can be used.

  As a method for forming the pattern layer 25, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used. In particular, the offset printing method and the gravure printing method are suitable for performing multicolor printing and gradation expression. In the case of a single color, a coating method such as a gravure coating method, a roll coating method, or a comma coating method may be employed. The pattern layer 25 may be provided entirely or partially depending on the decoration desired to be expressed.

  The pattern layer 25 may be made of a metal thin film or a combination of a printed film and a metal thin film. The metal thin film is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like. Metals such as aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, and zinc, and alloys or compounds thereof are used depending on the metallic luster color to be expressed. The pattern layer 25 may be provided entirely or partially depending on the decoration to be expressed.

  The adhesive layer 26 adheres each of the above layers to the surface to be decorated. Further, the adhesive layer 26 is formed in a portion to be bonded. That is, when the part to be bonded is the entire surface, the adhesive layer 26 is formed on the entire surface. As the adhesive layer 26, a heat-sensitive or pressure-sensitive resin suitable for the material to be decorated is used as appropriate. For example, when the material to be decorated is an acrylic resin, an acrylic resin may be used. If the material to be decorated is polyphenylene oxide / polystyrene resin, polycarbonate resin, styrene copolymer resin, or polystyrene blend resin, acrylic resin, polystyrene resin, polyamide having affinity with these resins A series resin or the like may be used. Furthermore, when the material to be decorated is a polypropylene resin, chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, cyclized rubber, and coumarone indene resin can be used. Examples of the method for forming the adhesive layer 26 include a coating method such as a gravure coating method, a roll coating method, and a comma coating method, a printing method such as a gravure printing method, and a screen printing method.

Next, the configuration of a molding apparatus to which the transfer sheet feeding apparatus 1 of the present invention is applied will be described.
Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

  The transfer sheet delivery device 4 is composed of a transfer sheet supply roll 40, a delivery roller 41, and an arbitrary number of guide rollers 42, 43. The transfer sheet delivery device 4 is disposed above the movable mold 32, and as shown in FIG. The rotating shaft 44 as a part is supported by the casing 45 so as to be freely rotatable. Further, in order to apply an appropriate tension to the supplied transfer sheet 2, a servo motor M2 may be used for driving the reel. The feed roller 41 is configured to rotate to feed the roll-shaped transfer sheet 2 to the parting surface of the movable mold 31 and stop the rotation when the positioning is completed.

  A clamp C may be installed in either or both of the transfer sheet feeding device 4 and the transfer sheet winding device 5. The clamp member presses the transfer sheet 2 against the guide rollers 45 and 53 and clamps it at a predetermined position. The clamp member includes a guide roller 43 located closest to the injection mold 3 in the guide rollers 42 and 43 of the transfer sheet feeding device 1 and guide rollers 51 and 52 of the transfer sheet winding device 5. Among them, they are respectively installed on guide rollers 52 located closest to the injection mold 3.

  The injection mold 3 is basically composed of a fixed mold 30 and a movable mold 31, and the movable mold 31 can be moved to a direction adjacent to the fixed mold 30 to be in a mold closed state and a mold open state. The molten resin 34 can be injected into a cavity space 33 (see FIG. 3) formed by the cavity surface of the fixed mold 30 and the cavity surface of the movable mold 31.

  Further, in order to accurately position the transfer sheet 2 with respect to the parting surface of the movable mold 31, a width direction positioning sensor 35 composed of a photoelectric rod is disposed above and / or below the parting surface of the movable mold 31. Thus, the position of the width direction positioning mark 22 of the transfer sheet 2 on the upstream sheet feeding side and / or the downstream sheet discharging side of the movable mold 31 is detected, and the sheet is adjusted to the correct position when the mark is released from the sensor. . In addition, a longitudinal positioning sensor (not shown) made of photoelectric rods is disposed upstream of the parting surface of the movable mold 31, and the position of the longitudinal positioning mark 20 of the transfer sheet 2 on the feeding side above the movable mold 31. May be detected so that the sheet can be accurately fed to a predetermined position on the parting surface of the movable mold 31.

  The transfer sheet take-up device 5 takes up the transfer sheet 2 located on the surface of the injection mold, and includes a plurality of guide rollers 51, 52, 53, a tension roller 6 and a take-up roller 50. The reel on which 2 is wound is supported by a downstream frame attached to the movable mold 32 of the molding machine so as to be movable in the width direction. In order to apply an appropriate tension to the supplied transfer sheet 2, a 13 servo motor M1 may be used to drive the reel. In order to make the downstream frame movable plate 32 movable in the width direction, for example, a guide rail and a guide may be combined and moved by upstream frame driving means (not shown).

  Next, the operation of the transfer sheet delivery device 4 will be described with reference to the drawings.

  The tension roller 6 is configured by a pressing roller 60 and a driving roller 61 so as to sandwich the transfer sheet 2. That is, the pressing roller 60 is provided with rubber on its surface, and its rotation shaft is rotatably connected to a cylinder fixed to the casing 54 of the transfer sheet winding device 5. Further, the driving roller 61 is provided with irregularities on the surface as in the knurling process, and rotates in synchronization with the rotation of the motor, and its rotation shaft is freely rotatable on a cylinder fixed to the casing 54 of the transfer sheet winding device 5. (Not shown).

  Further, the tension roller 6 has a mechanism capable of varying the distance from the injection molding die 3 to the tension roller 6 and is a three-dimensional transfer sheet formed continuously at a predetermined interval on the transfer sheet 2 by simultaneous molding transfer. Among the X and the transfer sheet flat portion Y, the position of the transfer sheet flat portion Y is specified, and the tension roller 6 can be moved to that position.

  That is, the position of the transfer sheet flat portion Y of the transfer sheet 2 that has been transferred to the outside of the injection molding die 3 after being simultaneously transferred using the transfer sheet 2 is identified by visual observation or the like. Is moved to that position, so that the transfer sheet flat portion Y after simultaneous molding and transfer can be sandwiched between the tension rollers 6 (see FIGS. 4A and 4B). As a result, the tension roller 6 can always apply a predetermined tension to the transfer sheet 2.

  As an example of moving the tension roller 6, the tension roller 6 can be moved to a desired place by a combination of a servo motor and an electric actuator 62 (see FIG. 5A). Moreover, the electric cylinder 63 can be installed in the lower part of the tension | pulling roller 6, and the tension | pulling roller 6 can also be moved to the desired place with the combination of the electric cylinder 63 and a control circuit (refer FIG.5 (b)). Further, a bolt 65 is installed in advance on a part of the tension roller 6 via a long hole slit member 64, the bolt 65 is once loosened, the tension roller 6 is moved along the slit, and the transfer sheet is visually flattened. The part Y can be specified and the bolt 65 can be tightened and fixed at that position (see FIG. 5C). As described above, the transfer sheet feeding device 1 of the present invention is configured such that the tension roller 6 moves in the flow direction B of the transfer sheet 2 so that the transfer sheet flat portion Y after the simultaneous transfer of molding is sandwiched. Wrinkles generated on the sheet can be prevented, and as a result, the positioning accuracy of the transfer sheet with respect to the injection mold 3 and the positioning accuracy with respect to the injection mold 3 for each simultaneous molding transfer are high.

  Next, a second embodiment of the transfer sheet feeding device 1 will be described. FIG. 6 shows the configuration of an injection molding apparatus equipped with another transfer sheet feeding apparatus 1. In FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. 7A and 7B show the path adjusting roller 7, respectively.

  The above-described path adjusting roller 7 includes two fixed rollers 70, one movable roller 71, and an elongated slit member 73 that defines a moving range of the movable roller 71. The position of the transfer sheet 2 to be sandwiched is determined. That is, since the transfer sheet 2 is guided to the tension roller 6 via the fixed roller 70 and the movable roller 71 among the path adjusting rollers 7, the transfer sheet 2 is sent from the injection mold 3 after the transfer sheet 2 is simultaneously formed. The position of the transfer sheet flat portion Y is visually identified, and the movable roller 71 is moved in the horizontal direction to the specified position, so that the tension roller 6 sandwiches the transfer sheet flat portion Y after the simultaneous molding and transfer. It is configured.

  As a method of moving the movable roller in the horizontal direction, a method of moving the movable roller to a desired place by a combination of a servo motor and an electric actuator (see FIG. 7A), a slot slit in advance in a part of the movable roller. There is a method in which a bolt is installed through a member, the bolt is once loosened, the tension roller 6 is moved along the slit, the transfer sheet flat portion Y is visually identified, and the bolt is tightened and fixed at that position. (See FIG. 7B).

  By these methods, the tension roller 6 can sandwich the transfer sheet flat portion Y after simultaneous molding and transfer, so that a predetermined tension applied to the transfer sheet 2 can be applied. Thus, in the transfer sheet feeding device 1 of the present invention, the tension roller 6 sandwiches the transfer sheet flat portion Y by moving the position of the movable roller 71. The generated wrinkles can be prevented, and as a result, the accuracy of positioning the transfer sheet 2 with respect to the injection mold 3 and the positioning accuracy with respect to the injection mold 3 for each simultaneous molding transfer are high.

  Next, a third embodiment of the transfer sheet feeding device 1 will be described. FIG. 8 shows the configuration of an injection molding apparatus equipped with another transfer sheet feeding apparatus 1. In FIG. 8, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. FIG. 8A, FIG. 8B, FIG. 8C, and FIG. 8D show an example of the turn roller 8. FIG.

  The third form of the transfer sheet feeding apparatus 1 uses a plurality of turn rollers 8 instead of using the path adjusting roller 7 used in the second form. In the case of the third form of the transfer sheet feeding apparatus 1, the transfer sheet 2 is unwound by a certain length from the transfer sheet supply roll 40 and descends in the arrow direction A, and between the injection mold 3 and the pulling roll. After passing through at least one turn roller 8 installed on the sheet, it reaches the pulling roll and is finally wound around the transfer sheet winding roll.

  The feeding device of the third embodiment is sandwiched between the tension rollers 6 by selectively using the plurality of turn rollers 8 installed as described above and adjusting the amount of the transfer sheet 2 fed to the tension rollers 6. The position of the transfer sheet 2 to be transferred can be adjusted.

  Adjustment of the length of the transfer sheet 2 fed to the pulling roller 6 is achieved by arbitrarily selecting the number of turn rollers 8 through which the transfer sheet 2 passes and the place through which the turn rollers 8 pass. As an example, when the turn roller 8 is composed of seven, a method of alternately passing the transfer sheet 2 to each of the turn rollers 80, 81, 82, 83, 84, 85, 86 (see FIG. 8A), A method of passing only the turn rollers 80, 81, 82, 84, 85, 86 through the transfer sheet 2 (see FIG. 8B), and a method of passing only the turn rollers 80, 81, 85, 86 through the transfer sheet 2 (FIG. 8). (See (c)), by selecting any one of the methods in which the transfer sheet passes through the inside of the “<shape” formed of seven turn rollers (see FIG. 8 (d)), The location of the transfer sheet 2 sandwiched between the tension rollers 6 can be adjusted.

  As described above, the transfer sheet feeding apparatus 1 of the present invention selectively adjusts the length of the transfer sheet 2 fed from the turn roller 8 to the tension roller 6 by selectively using a plurality of turn rollers 8. Therefore, the tension roller 6 can be configured to sandwich the flat portion Y of the transfer sheet. By using the transfer sheet feeding device 1 of the present invention, the transfer sheet feeding device 1 with high accuracy of the position of the transfer sheet 2 with respect to the injection mold 3 is obtained during simultaneous molding transfer. As a result, the transfer position accuracy is high. A decorative molded product can be obtained.

  The transfer sheet feeding apparatus 1 of the present invention can be used in other modes than those described above. For example, in the case where the transfer is performed on both surfaces of the resin molded product using the simultaneous molding transfer method, the transfer sheet 2 is disposed on both the fixed mold 30 surface and the movable mold 31 surface of the injection mold 3, At the same time as the two transfer sheets 2 are sandwiched between the injection molds 3 and then the molten resin 35 is injected between the two transfer sheets 2 and cooled to obtain a resin molded product. The transfer sheet 2 may be bonded to both surfaces of the molded product, the base sheet is peeled off, and the transfer layer is transferred to both surfaces of the transfer object for decoration.

  In this case, two transfer feeding devices of the present invention are used, one being a transfer sheet feeding device in the vertical direction for feeding and winding the transfer sheet 2 in the vertical direction, and the other feeding the transfer sheet 2 in the horizontal direction. Further, it may be used as a horizontal transfer sheet feeding device for winding. This is because the transfer sheet feeding apparatus 1 can be arranged even when the installation space is narrow by configuring the transfer sheet feeding apparatus 1 as described above.

  Even when the transfer sheet 2 moves in the horizontal direction, the transfer sheet feeding device 1 unwinds the transfer sheet 2 from the transfer sheet supply roll 40 by a certain length, moves it in the horizontal direction, 6, the take-up roll of the transfer sheet take-up device 5 is taken up. In this case as well, the tension roller 6 is moved, or the path adjusting roller 7 or the turn roller 8 is used as the injection mold 3 and the tension roller. 6, the tension roller 6 can selectively sandwich the transfer sheet flat portion Y as described above. As a result, also in the transfer sheet feeding device in the horizontal direction, the positioning accuracy of the transfer sheet 2 with respect to the injection mold and the positioning accuracy with respect to the injection mold for each simultaneous molding transfer are high.

  The present invention is used when creating various decorative molded products such as front grilles, side moldings, door mirror covers, emblems, automobile exterior parts such as wheels, communication equipment such as mobile phones, information equipment inside automobiles, and home appliances. It can be industrially useful.

1 is a side view of a transfer sheet feeding device according to a first embodiment of the present invention. It is a front view of the transfer sheet used for the transfer sheet feeding device of the present invention. It is sectional drawing inside an injection mold at the time of simultaneous molding transfer. It is a perspective view of the tension roller which concerns on the transfer sheet feeding apparatus of the 1st form of this invention. It is a side view of the tension | pulling roller which concerns on the transfer sheet feeding apparatus of the 1st form of this invention. It is a side view of the transfer sheet feeding apparatus which concerns on the 2nd form of this invention. It is a side view of the path | route adjustment roller which concerns on the transfer sheet feeding apparatus of the 2nd form of this invention. It is a side view of the transfer sheet feeding apparatus which concerns on the 3rd form of this invention. It is a side view of the turn roller which concerns on the transfer sheet feeding apparatus of the 3rd form of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer sheet feeder 2 Transfer sheet 3 Injection mold 4 Transfer sheet delivery device 5 Transfer sheet take-up device 6 Tension roller 7 Path adjustment roller 8 Turn roller 20 Longitudinal positioning mark 21 Picture 22 Width direction positioning mark 23 Base sheet 24 Release layer 25 Design layer 26 Adhesive layer 30 Fixed mold 31 Movable mold 32 Movable plate 33 Cavity space 34 Molten resin 35 Width direction positioning sensor 36 Longitudinal position sensor 40 Transfer sheet supply roll 41 Sending roller 42 Guide roller 43 Guide roller 44 Rotating shaft 45 Casing 50 Winding roller 51 Guide roller 52 Guide roller 53 Casing 60 Pressing roller 61 Driving roller 62 Electric actuator 63 Electric cylinder 64 Long hole slit member 65 Bolt 70 Fixed roller 71 Movable roller 72 Long hole Lit member 80 Turn roller 81 Turn roller 82 Turn roller 83 Turn roller 84 Turn roller 85 Turn roller 86 Turn roller 200 Transfer layer A Arrow direction B Transfer sheet flow direction C Clamp M Servo motor M1 Transfer sheet take-up device lower motor M2 Transfer Upper sheet feeding device motor X Transfer sheet solid part Y Transfer sheet flat part

Claims (3)

A transfer sheet feeding device for unwinding a transfer sheet wound in a roll shape and feeding the transfer sheet to a parting surface of an injection mold, and a transfer sheet winding for winding the transfer sheet passing through the parting surface of the injection mold A transfer sheet feeding device that continuously performs molding and simultaneous transfer by aligning and feeding the transfer sheet into the injection mold at a predetermined interval. A take-up roller for winding the transfer sheet under tension, an injection mold, and a tension roller comprising a pair of rollers for passing the transfer sheet between the take-up roller and the position of the transfer sheet The transfer roller is configured so that the position of the tension roller can be adjusted so that the tension roller always sandwiches a predetermined portion of the transfer sheet at the time of alignment. Door feeder. A transfer sheet feeding device for unwinding a transfer sheet wound in a roll shape and feeding the transfer sheet to a parting surface of an injection mold, and a transfer sheet winding for winding the transfer sheet passing through the parting surface of the injection mold A transfer sheet feeding device that continuously performs molding and simultaneous transfer by aligning and feeding the transfer sheet into the injection mold at a predetermined interval. A tension roller consisting of a pair of rollers for passing the transfer sheet under tension between the winding roller, the injection mold and the winding roller that winds the transfer sheet under tension, and the injection mold and tension And a path adjusting roller that adjusts the path length of the transfer sheet between the roller and the tension roller always keeps a predetermined position on the transfer sheet when aligning the transfer sheet. Transfer sheet feeding apparatus, wherein a position of the route regulation roller is configured to be adjusted to sandwich. A transfer sheet feeding device for unwinding a transfer sheet wound in a roll shape and feeding the transfer sheet to a parting surface of an injection mold and a transfer sheet winding for winding the transfer sheet that has passed the parting surface of the injection mold A transfer sheet feeding device that continuously performs molding simultaneous transfer by aligning and feeding the transfer sheet into the injection mold at a constant interval, and the transfer sheet take-up device at the end of the transfer sheet. A tension roller composed of a pair of rollers for passing a transfer sheet under tension between a winding roller, an injection mold and a winding roller for winding the transfer sheet under tension, an injection mold and a tension roller And a plurality of turn rollers for adjusting the transfer sheet path length, and when the transfer sheet is aligned, the tension roller moves a predetermined portion of the transfer sheet. Transfer sheet feeding device characterized by any turn roller transfer sheet is configured to be passed to sandwich the.

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