JP5113125B2 - Mold for simultaneous molding and transfer sheet transfer method - Google Patents

Description

  The present invention relates to a molding simultaneous transfer mold and a molding simultaneous transfer molding apparatus for simultaneous molding transfer, in which a continuous transfer sheet having a pattern is placed in a cavity, and the pattern is transferred to a molded product simultaneously with injection molding. Also, the present invention relates to a transfer sheet feeding method for simultaneous transfer of molding.

  Conventionally, in a transfer sheet feeding device for simultaneous transfer of molding, in order to register a pattern fed into the cavity, a photoelectric tube sensor is provided to measure the position of the pattern, and the rollers provided before and after the cavity are moved left and right. There is known an apparatus for moving the register to register the position (for example, see Patent Document 1).

  In the molding simultaneous transfer method, the operation of positioning the transfer sheet on the cavity surface is as follows: (1) design part feeding process, (2) transfer sheet clamping process, and (3) adhesion of the transfer sheet to the cavity surface by vacuum suction Proceed in the order of the steps.

  The registration using the position sensor or the like described above is performed in the feeding step (1). And even if the registration is performed accurately in the feeding process, distortion of the pattern transferred to the molded product may occur.

  In particular, in the case of a long molded article, there is a drawback that the straight line is distorted and decorated if the pattern has a straight line or the border line with different colors is long.

JP 7-329109 A

  The problem to be solved is to propose a transfer sheet feeding method in which a pattern including a straight line or a pattern having a straight line between two colors is not distorted, and the transfer sheet feeding apparatus solves the problem. There is in getting.

  Other problems of the present invention will become apparent from the description of the present invention.

  The inventor has observed the distortion of a straight line in the simultaneous molding and transfer of a long object, and has obtained knowledge that the distortion is generated in a random direction. Then, the present inventors have found that tension is applied to the transfer sheet due to registration in the feeding process, that is, due to the left-right movement of the roller of the transfer sheet feeding device. The tension is different for each transfer molding in continuous molding. Moreover, the tension is latent. For this reason, the registration of the symbol area is normally performed.

  Then, in the subsequent clamping step and the adhering step by suction, the tension becomes obvious, and the pattern is distorted and adheres to the cavity surface.

  The means for solving the problems conceived based on the above knowledge will be described. For ease of understanding, description will be made with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited to the embodiments. Also, numerals as symbols collectively indicate parts and the like, and in the embodiments described later, when indicating individual parts and the like, there are those in which alphabetic suffixes are added after the numbers.

The mold for simultaneous transfer molding according to one aspect of the present invention is
A continuous transfer sheet (11) in which a plurality of unit symbols, which are symbols transferred in a single injection molding and transferred to a molded product, are arranged in the longitudinal direction of the belt-like base material sheet is composed of an A mold and a B mold. A mold for simultaneous molding transfer, which is disposed in the cavity and has a clamp (50) for pressing the front and back regions of the unit design in the continuous transfer sheet against the part surface of the mold A and simultaneously transfers the unit design to the molded product at the time of injection molding. In
The running direction of the continuous transfer sheet is the front-rear direction, the direction orthogonal to the front-rear direction is the left-right direction,
The clamp includes a front clamp 51 extending in the left-right direction and a rear clamp extending in the left-right direction (52).
A front tension applying member (55) provided in a partial length region in the left-right direction of the front clamp so as to protrude toward the mold A;
A rear tension applying member (56) provided to project toward the A mold side in a partial length region of the rear clamp in the left-right direction;
The secondary part surface of the A mold has a front receiving groove (61) for storing the front tension applying member and a rear receiving groove (62) for storing the rear tension adding member.

The mold for simultaneous molding and molding according to a preferred embodiment of the present invention is:
Further, a front raising member that is located in front of the front clamp and abuts against a partial length region in the left-right direction of the continuous transfer sheet to raise the continuous transfer sheet from the secondary part surface of the A mold to the B mold side. (46)
A rear raising member (47) located behind the rear clamp and abutting a partial length region in the left-right direction of the continuous transfer sheet to raise the continuous transfer sheet from the secondary part surface of the A mold to the B mold side. ) May be provided.

  According to this preferred embodiment, the continuous transfer sheet is raised to the B die side by the front raising member and the rear raising member, and is pressed to the A die side by the front tension applying member and the rear tension adding member. Therefore, the mold can be more effectively applied with the tension.

The molding apparatus for simultaneous molding and transfer according to another aspect of the present invention is as follows.
A continuous transfer sheet in which a plurality of unit symbols, which are symbols to be transferred to a molded product in a single injection molding, are arranged in the longitudinal direction of the belt-like base material sheet in a cavity composed of A mold and B mold. A transfer sheet feeding device comprising a sheet side guide roller and a take-up side guide roller, and A mold, B mold and the front and back area of the unit symbol in the continuous transfer sheet on the part surface of the A mold In a molding simultaneous transfer molding device comprising a molding simultaneous transfer mold having a clamp for pressing,
The running direction of the continuous transfer sheet is the front-rear direction, the direction orthogonal to the front-rear direction is the left-right direction,
The clamp comprises a front clamp (51) extending in the left-right direction and a rear clamp (52) extending in the left-right direction,
The sheet-side guide roller (95) has a cylindrical shape and occupies a part of a rotational axis length region extending to the left and right of the sheet-side guide roller (95). 96),
The take-up side guide roller (91) has a cylindrical shape, and occupies a part of a rotation axis length region extending to the left and right thereof, and a front raised ring portion that is a spherical portion having a longer rotation radius than the cylindrical portion. (92)
In the continuous transfer sheet, the region connecting the portion that contacts the front raised ring portion and the portion that contacts the rear raised ring portion is raised from the secondary part surface of the A mold to the B mold side,
In a partial length region in the left-right direction of the front clamp, a front tension applying member provided to protrude toward the A mold side is provided.
A rear tension applying member provided to protrude to the A mold side in a partial length region in the left-right direction of the rear clamp;
The secondary part surface of the A mold has a front receiving groove for storing the front tension applying member and a rear receiving groove for storing the rear tension adding member.

A transfer sheet feeding method for simultaneous molding transfer according to another aspect of the present invention is as follows.
A continuous transfer sheet (11) in which a plurality of unit symbols, which are symbols transferred in a single injection molding and transferred to a molded product, are arranged in the longitudinal direction of the belt-like base material sheet is composed of an A mold and a B mold. In the transfer sheet feeding method for simultaneous molding transfer that is placed in the cavity and transfers the unit design to the molded product at the same time as injection molding,
Among the plurality of unit symbols, a unit symbol arranged in the cavity is a specific unit symbol (14),
Using a molding simultaneous transfer molding apparatus in which the running direction of the continuous transfer sheet is the front-rear direction (81), and the direction orthogonal to the front-rear direction is the left-right direction (86).
This is a transfer sheet feeding method comprising the following steps.
The arrangement | positioning process which arrange | positions the specific unit design of a continuous transfer sheet to the division surface of A metal mold | die and B metal mold | die.
(B) A step performed after the arrangement step, which is in front of the specific unit symbol front end (141) and presses a front tension application region which is a partial length region in the left-right direction to the A mold side,
A tension applying step of applying a tension to the continuous transfer sheet by pressing a rear tension applying region, which is after the specific unit symbol rear end (142) and is a partial length region in the left-right direction, toward the A mold side.
(C) A clamping operation step of pressing the front and rear regions of the specific unit design on the continuous transfer sheet against the secondary part surface (44) of the A mold in a state where the tension is applied by the tension applying step.
In the pressing state in the clamping operation step, the space between the continuous transfer sheet and the cavity surface (45) of the A mold is reduced in pressure, and the specific unit design portion of the continuous transfer sheet is brought into close contact with the cavity surface of the A mold. Depressurization adhesion process.

In another preferred embodiment of the present invention, the transfer sheet feeding method includes:
The molding simultaneous transfer molding apparatus further comprises:
A front raised portion that is a part of the continuous transfer sheet and is located in front of the pre-tension applying region and is arranged to raise a front raised region, which is a partial length region in the left-right direction, to the B mold side. Means (46 or 92);
Post-lifting means that is a part of the continuous transfer sheet and is located after the post-tension applying region and is arranged to raise the rear raising region, which is a partial length region in the left-right direction, to the B mold side (47 or 96)
The transfer sheet feeding method in which the arrangement step (a) is replaced by the arrangement step (i) below, and the tension applying step (b) is replaced by the tension applying step (b-1) below.
A-1 is a step of arranging a specific unit design of the continuous transfer sheet on the divided surfaces of the A mold and the B mold, and arranging the base sheet in contact with the front raising means and the rear raising means.
B-1 A step performed after the arranging step, wherein the front tension applying region which is between the front raised region and the front end of the specific unit symbol and is a partial length region in the left-right direction is pressed against the A mold side. ,
A tension applying step of applying a tension to the continuous transfer sheet by pressing the rear tension applying region, which is between the rear raised region and the rear end of the specific unit symbol and is a partial length region in the left-right direction, to the A mold side.

  In the present preferred embodiment, the front raising means may be a front raising member (46) attached to the A mold, or may be a front raising ring portion (92) which is a different radius portion provided on the winding side guide roller. Similarly, the rear raising means may be a rear raising member (47) attached to the A mold, or a rear raising ring portion (96) which is a different diameter portion provided on the sheet side guide roller.

  According to this preferred embodiment, the continuous transfer sheet is placed on the B mold side by the front raising means and the rear raising means and arranged on the B mold side, and the front tension applying member and the rear tension applying member are placed on the A mold side. Since the step of applying a tension to be pressed is included, a transfer sheet feeding method for simultaneous molding and transfer in which additional tension for correcting distorted tension is more effectively applied.

  The present invention described above, preferred embodiments of the present invention, and components included in these can be implemented in combination as much as possible.

  The molding simultaneous transfer mold according to one aspect of the present invention includes a specific pre-tension applying member and a specific post-tension applying member protruding from the clamp surface, together with other features. At the same time as the clamping operation, a mold for applying tension to a rectangular portion which is a partial region of the specific unit symbol region is obtained. Due to the applied tension, the distorted latent tension stored by the alignment or the like is canceled, and the specific unit symbol is brought into close contact with the cavity surface without being distorted. For this reason, there is an advantage that even if it is a long molded product and a molded simultaneous transfer product including a linear pattern in the longitudinal direction, the pattern including the straight line is transferred without distortion.

  The molding apparatus for simultaneous molding and transfer according to another aspect of the present invention has, in addition to other features, the sheet side guide roller has a rear raised ring portion, and the winding side guide roller has a front raised ring portion, By simply changing the shape of the guide roller, a means for raising the continuous transfer sheet is realized. Then, combined with pressing by the front tension applying member and the rear tension applying member, the tension for correcting the distortion of the specific unit symbol is further effectively applied.

  The transfer sheet feeding method according to another aspect of the present invention, together with other features, applies tension to a rectangular portion, which is a partial area of the specific unit design area, prior to the process of clamping the continuous transfer sheet and contacting the cavity surface. As a result, the distorted latent tension stored by the alignment or the like is canceled, and the specific unit symbol is brought into close contact with the cavity surface without being distorted. For this reason, it becomes a transfer sheet feeding method for simultaneous molding transfer in which a pattern including a straight line that is not distorted is transferred even if it is a long molding and a molded simultaneous transfer including a linear pattern in the longitudinal direction. .

FIG. 1 is an explanatory view of a simultaneous molding and transfer apparatus including a transfer sheet feeding apparatus according to the present invention. FIG. 2 is a front view of the A mold in which the specific unit symbol is positioned on the cavity surface. FIG. 3 is an explanatory view showing each step of the operation of positioning the transfer sheet on the cavity surface. FIG. 4 is a cross-sectional explanatory view of the continuous transfer sheet. FIG. 5 is an explanatory plan view of a part of the continuous transfer sheet. FIG. 6 is an explanatory view showing a transfer sheet feeding device. (Example 2)

  Hereinafter, the mold for simultaneous molding and transfer, the molding apparatus, and the transfer sheet feeding method according to the embodiment of the present invention will be further described with reference to the drawings. The dimensions, materials, shapes, relative positions, etc. of the members and parts described in the embodiments of the present invention are not intended to limit the scope of the present invention only to those unless otherwise specified. It is just an illustrative example.

  The simultaneous molding and transfer apparatus according to the present invention has an A mold 41 and a B mold 42. In this embodiment, the A mold 41 is a movable mold, and the B mold 42 is a fixed mold. The A mold 41 has a cavity 43. Here, the surface of the A mold 41 facing the B mold 42 is the secondary part surface 44.

  The continuous transfer sheet 11 is disposed between the A mold 41 and the B mold 42 so as to run. The continuous transfer sheet 11 is supplied from a sheet roll 31 and is taken up by a take-up roll 32. A first sheet side guide roller 33 is provided at a position spaced apart in the horizontal direction of the sheet roll 31. The first sheet side guide roller 33 is movable to the left and right with respect to the A mold 41 by the action of the first cylinder 34.

  A first take-up guide roller 35 is provided on the upstream side of the take-up roll 32. The first winding-side guide roller 35 can move to the left and right with respect to the A mold 41 by the action of the first cylinder 36. The first sheet side guide roller 33 and the first winding side guide roller 35 have a cylindrical shape.

  About this invention and a present Example, the front-back direction is shown with the arrow 81 regarding the continuous transfer sheet 11, A metal mold | die 41, B metal mold | die 42, the clamp 50 mentioned later, etc. FIG. That is, in the direction in which the continuous transfer sheet 11 travels through the cavity 43, the upstream side is “front” indicated by an arrow 82, and the downstream side is “rear” indicated by an arrow 83.

  The direction orthogonal to the front-rear direction is the left-right direction, and the left-right direction is indicated by arrows 86. The left side of the drawing in FIG. 1 is “left” indicated by an arrow 87, and the right side of the drawing is “right” indicated by an arrow 88. The horizontal direction is in a plane parallel to the secondary cavity surface 44 and the surface of the continuous transfer sheet 11.

  With reference to FIG. 4, the continuous transfer sheet 11 is formed by forming a release layer 22 on one surface of a base sheet 21 and forming a partial design layer 23 and an adhesive layer 24 on the release layer. The substrate sheet 21 is set in the transfer sheet feeding device so as to face the cavity surface 45 of the A mold.

  Referring to FIG. 5, in the continuous transfer sheet 11, a plurality of unit symbols 13 are arranged in the longitudinal direction of the belt-shaped base sheet 21. The longitudinal direction of the base sheet 21 is the same as the front-rear direction of the continuous transfer sheet 11. A unit symbol means a symbol transferred to a molded product in one injection molding operation. In the present embodiment, two molded products are molded in one injection molding process. It is a so-called 2 piece picking. For this reason, the unit symbol 13 includes two identical symbols. The unit symbol can include any number of the same symbol, such as one, four or eight. Among the unit symbols, the unit symbol positioned in the cavity 43 is named a specific unit symbol.

  The plurality of unit symbols 13 are arranged on the continuous transfer sheet 11 with front and rear margins 15a and 15b interposed therebetween. The left margin of the unit symbol is the left margin 17, and the right margin of the unit symbol is the right margin 18. A margin part included in the single symbol 13 and between the symbols is a margin 16 between symbols.

  Returning to FIG. 1, optical sensors 37 are installed on the front, rear, left and right sides of the cavity 43. On the other hand, optical markers indicating front, rear, left and right are printed in the blank portion of the continuous transfer sheet 11. The optical marker is not shown. When the continuous transfer sheet 11 travels, the optical sensor 37 reads the optical marker, determines the relative position between the specific unit symbol 14 and the cavity 43, and performs registration. The registration is performed by the feed amount of the first sheet side guide roller 33 and the first take-up side guide roller 35 and the left and right movements of the first cylinders 34 and 36. Due to the registration operation, potential tension is accumulated in the area of the specific unit symbol 14.

  A clamp 50 is disposed between the A mold 41 and the B mold 42. The clamp 50 is movable to the A mold 41 side. The clamp 50 plays a role of pressing the outer periphery of the specific unit symbol 14 against the secondary part surface 44 of the A mold 41. The clamp 50 is a single piece including a front clamp 51 and a rear clamp 52. The one-piece clamp may further include a left clamp 53 and a right clamp 54.

  The front clamp 51 comes into contact with the front and rear margin 15a immediately before the specific unit symbol 14 in the continuous transfer sheet 11. The front and rear margin 15a is in front of the front end 141 of the specific unit symbol. The left and right length with which the front clamp 51 abuts is equal to or slightly shorter than the left and right length of the continuous transfer sheet 11.

  The rear clamp 52 abuts on the front and rear margin 15b immediately after the specific unit symbol 14 in the continuous transfer sheet 11. The front-rear margin 15b is after the rear end 142 of the specific unit symbol 14. The left and right length with which the rear clamp 52 abuts is equal to or slightly shorter than the left and right length of the continuous transfer sheet 11.

  A front raising member 46 is disposed at the front end of the A mold 41. The front raising member 46 protrudes toward the B mold side, and the front end of the front raising member 46 is located closer to the B mold side than the secondary part surface 44.

  When the front and rear positions at which the front raising member 46 is disposed are described in relation to other members and portions, the front raising member 46, the front clamp 51, and the front end 141 of the specific unit symbol are sequentially arranged from the front. If the above-described front and rear positions are maintained, the front raising member 46 may be provided on the secondary part surface 44 of the A mold.

  The front raising member 46, together with the rear raising member 47 described later, plays a role of raising the continuous transfer sheet from the secondary part surface of the A mold to the B mold side. The front raising member 46 and the rear raising member 47 abut on the base sheet 21 side of the continuous transfer sheet 11.

  Although the lower limit of the width in the left-right direction of the front raising member 46 is not particularly limited, for example, it is 1/20 or more of the lateral width of the continuous transfer sheet, and the upper limit is 1/3 of the lateral width of the continuous transfer sheet. This is because if the left and right width is within this range, the continuous transfer sheet is not torn due to the application of a local force, and tension can be applied to necessary portions on the continuous transfer sheet.

  The front-rear direction width of the front raising member 46 is not particularly limited. Since the continuous transfer sheet is raised in cooperation with the rear raising member, there is no point in elongating the front-rear direction. For example, a cylinder with a radius of 3 mm and a spherical surface of R10 mm may be used. Further, for example, the rotation axis may be parallel to the left and right and freely rotatable, or may be a spherical shape that does not rotate. If the spherical shape is freely rotatable, there is an advantage that the pattern on the continuous transfer sheet is not further damaged.

  The distance between the front end of the front raising member 46 and the secondary part surface 44 is 2 mm to 5 mm, and may be determined in consideration of the longitudinal length of the unit symbol.

  A part of the continuous transfer sheet that contacts the front raising member 46 is referred to as a front raising region 19.

  A rear raising member 47 is disposed at the rear end of the A mold 41. The rear raising member 47 protrudes toward the B mold side, and the front end of the rear raising member 47 is located closer to the B mold side than the secondary part surface 44.

  When the front and rear positions where the rear raising member 47 is disposed are described in relation to other members and parts, the rear raising member 47, the rear clamp 52, and the rear end 142 of the specific unit symbol are arranged in order from the rear. If the above-described front and rear positions are maintained, the rear raising member 47 may be provided on the secondary part surface 44 of the A mold.

  The width of the rear raising member in the left-right direction, the width in the front-rear direction, the protruding distance from the secondary part surface, the shape of the tip, and the like are the same as the respective values in the front raising member described above.

  A part of the continuous transfer sheet that comes into contact with the rear raising member 47 is referred to as a rear raising region 20.

  A front tension applying member 55 is provided on the surface of the front clamp 51 facing the continuous transfer sheet 11 so as to protrude from the surface to the A mold side. Further, a rear tension applying member 56 is provided on the surface of the rear clamp 52 facing the continuous transfer sheet 11 so as to protrude from the surface toward the A mold side.

  The upper limit of the lateral length of the front end portion of the front tension applying member 55 and the front end portion of the rear tension applying member 56 is 1/3 of the lateral width of the continuous transfer sheet. This is because the purpose is to cancel the latent strain tension by applying tension only to a certain left and right width region. The lower limit of the width in the left-right direction of the front tension applying member 55 is not particularly limited, but is, for example, 1/20 or more of the left-right width of the continuous transfer sheet. If the left-right width is within this range, the continuous transfer sheet will not be torn due to the application of local force.

  The front-rear direction width of the front end portion of the front tension applying member 55 and the front end portion of the rear tension applying member 56 is not particularly limited. Usually, it may be 0.5 mm to 10.0 mm. Moreover, it is preferable to make a front-end | tip into a semi-cylindrical surface, for example, what is necessary is just to make R into a 10-mm cylindrical surface.

  The distance between the front end of the front tension applying member 55 and the clamp surface of the front clamp 51 and the distance between the front end portion of the rear tension applying member 56 and the clamp surface of the rear clamp 52 are 2 mm to 5 mm. It may be determined in consideration of the above.

  The front / rear margin portion 15a with which the front tension applying member 55 abuts is named a front tension applying region, and the front / rear margin portion 15b with which the rear tension applying member 56 abuts is named a rear tension applying region.

  On the secondary part surface 44 of the A mold 41, a front receiving groove 61 for storing the front tension applying member 55 and a rear receiving groove 62 for storing the rear tension adding member 56 are formed.

  Since the front tension applying member 55 and the rear tension adding member 56 are installed so as to protrude from the clamping surface of the clamp 50, the clamp 50 is accompanied by an operation of approaching the secondary part surface 44 in order to clamp the continuous transfer sheet 11. Thus, the front tension application member 55 and the rear tension application member 56 push the continuous transfer sheet 11, and tension is applied to the rectangular portion connecting the front tension application member 55 and the rear tension application member 56. The rectangular portion is in the region of the specific unit symbol 14, and if the straight lines 146a, 146b in the symbol are in or near the rectangle, the straight line is clamped without distortion, and even in the subsequent vacuum suction, Is maintained.

  With respect to the left-right direction of the continuous transfer sheet 11, it is preferable that the front tension application member 55 and the rear tension application member 56 be placed at the same position. This is because an additional tension parallel to the front-rear direction can be applied. From the same point of view, the front raising member 46 and the rear raising member 47 are most preferably in the middle of the left-right direction position where the longitudinal tension applying member is located, and preferably between the left-right direction positions.

  If the part you want to correct the distortion is not adjacent, divide the pre-tension applying member, that is, provide two or more pre-tension applying members, divide the post-tension applying member, that is, add two or more post-tension It is also possible to provide a member. Similarly, the front raising member and the rear raising member can be provided separately.

  Next, the molding simultaneous transfer process will be described with reference to FIG. First, the unit symbol on the continuous transfer sheet 11 is positioned in the cavity. Then, the specific unit symbol 14 and the cavity 43 are registered.

  The state after the completion of the registration is illustrated in FIG. The continuous transfer sheet 11 is in contact with the front raising member 46 and the rear raising member 47 on the base sheet 21 side. The continuous transfer sheet 11 is in a state of floating from the secondary part surface 44 of the A mold 41.

  Subsequently, a clamping operation is performed. When the integrated clamp 50 moves to the A mold 41 side, the front tension application member 55 and the rear tension application member 56 protruding from the clamp surface come into contact with the continuous transfer sheet 11. Further, the clamp 50 continues to move in the same direction, and the front tension applying member 55 fits into the front receiving groove 61 while the continuous transfer sheet 11 is inserted. Similarly, the rear tension applying member 56 is fitted in the rear receiving groove 62 while the continuous transfer sheet 11 is inserted.

  The continuous transfer sheet 11 is pushed in the B mold direction (left side in FIG. 3) by the front raising member 46, and further in the cavity surface direction (right side in FIG. 3) than the secondary part surface 44 by the front tension applying member 55. Pressed. Similarly, the continuous transfer sheet 11 is pushed in the B mold direction (left side in FIG. 3) by the rear raising member 47, and further in the cavity surface direction of the A mold (see FIG. 3) than the secondary part surface 44 by the rear tension applying member 56. To the right).

  Therefore, tension is applied to the rectangular portion of the continuous transfer sheet sandwiched between the front tension applying member 55 and the rear tension adding member 56. The left and right arrangement positions and the left and right lengths of the front tension applying member and the rear tension adding member are designed so that the rectangular portion includes a straight line portion in the specific unit symbol.

  Referring to FIG. 2, straight lines 146 a and 146 b are included in specific unit symbol 14. The front tension applying member 55, the rear tension adding member 56, and the front raising member 46 and the rear raising member 47 include a straight line 146a and a straight line 146b in a virtual rectangle connecting the front tension adding member 55 and the rear tension adding member 56. Are arranged as follows.

  Continue to explain the clamping process. Simultaneously with the application of tension, the outer periphery of the specific unit symbol 14 is pressed against the secondary part surface 44 of the A mold 41 by the clamp 50.

  Next, the cavity of the A mold is decompressed, and the continuous transfer sheet 11 is sucked. The continuous transfer sheet 11 is brought into close contact with the cavity surface 45 by being pressed against the atmospheric pressure. At this time, the rectangular portion to which the tension of the continuous transfer sheet 11 is applied receives the tension drawn in the front-rear direction, and the straight lines 146a and 146b are not distorted and are held in close contact with the cavity surface 45 without being distorted.

  Thereafter, the A mold 41 moves to the B mold 42 side, and the mold is closed. Then, resin melted by heating is injected into the cavity from the gate provided in the B mold. At this time, the design on the continuous transfer sheet 11 is transferred to the molding resin side by the pressure heat of the molten injection resin.

  After cooling or allowing to cool, the A mold and the B mold are opened, and the molded product is taken out.

  According to the present invention, for example, a linear pattern can be transferred to a molded product having a length of 1000 mm with a strain of 0.5 mm or less.

(Example 2)
The member for raising the continuous transfer sheet is not limited to the single front raising member 46 and the rear raising member 47 described above, and the columnar shape which is the guide roller portion on the sheet side guide roller and the winding side guide roller. The guide roller and the raising member may be shared by providing a front raising ring part and a rear raising ring part, which are part spherical surfaces having a longer radius of rotation than the part.

  FIG. 6 is an explanatory view showing a continuous transfer sheet feeding apparatus used in the second embodiment. The continuous transfer sheet 11 is supplied from a sheet roll 31 and is taken up by a take-up roll 32. A second sheet side guide roller 95 is provided at a position spaced apart in the horizontal direction of the sheet roll 31. A second winding-side guide roller 91 is provided on the upstream side of the winding roll 32.

  An A mold, a B mold, a clamp, and the like are arranged between the second sheet side guide roller 95 and the second take-up side guide roller 91, but these have the same shape and arrangement as those shown in FIG. The illustration is omitted.

  The second sheet side guide roller 95 has a columnar shape, and its rotation axis is in the left-right direction. The middle part in the left-right direction is a thicker part than both ends, and is a rear raised ring part 96. The rear raised portion 96 has the shape of a part of a sphere. The rear raised ring portion 96 can be expressed as a partial spherical portion having a longer radius of rotation than the cylindrical portion that is the guide roller portion. The continuous transfer sheet 11 is in close contact with the second sheet side guide roller 95 and passes the left side of the second sheet side guide roller 95. The second sheet side guide roller 95 can move left and right by the action of the second cylinder 98.

  The second winding-side guide roller 91 has a cylindrical shape, and its rotation axis is in the left-right direction. The middle portion in the left-right direction is a thicker portion than both ends, and is a front raised ring portion 92. The front raised ring portion 92 has the shape of a part of a sphere. The front raised ring portion 92 can be expressed as a partial spherical portion having a longer radius of rotation than the cylindrical portion that is the guide roller portion. The continuous transfer sheet 11 is in close contact with the second winding side guide roller 91 and passes the left side of the second winding side guide roller 91. The second winding-side guide roller 91 can move left and right by the action of the second cylinder 94.

  The continuous transfer sheet stretched between the second sheet side guide roller 95 and the second take-up side guide roller 91 has a region connecting the portion contacting the front raising ring and the portion contacting the rear raising ring from the remaining portion. Is also raised. Accordingly, a part of the specific single pattern is raised from the secondary part surface of the A mold to the B mold side.

  Also, if the positional relationship between the guide roller, the continuous transfer sheet, and the A mold is different, a raised curved surface having a shorter radius of rotation and a smooth curved surface is formed on a part of the guide roller as compared with the cylindrical part which is the guide roller part. May be part.

  With respect to the front raised ring portion 92 and the rear raised ring portion 96, the width in the left-right direction, the protruding distance from the original guide roller portion surface, and the like are the same as those in the above-described front raised member 46.

  The transfer sheet feeding method according to the present invention can be performed using the continuous transfer sheet feeding apparatus.

11 Continuous transfer sheet 14 Specific unit design 19 Front raised area 20 Rear raised area 21 Base sheet 41 A mold 42 B mold 43 Cavity 44 Secondary part surface 45 Cavity surface 46 Front raised member 47 Rear raised member 50 Clamp 51 Front Clamp 52 Rear clamp 55 Front tension imparting member 56 Rear tension imparting member 61 Front receiving groove 62 Rear receiving groove 91 Second take-up side guide roller 92 Front raised ring portion 95 Second sheet side guide roller 96 Rear raised ring portion 141 Specific unit Symbol front end 142 Specific unit symbol rear end 146a, 146b Straight line

Claims (3)

A continuous transfer sheet in which a plurality of unit symbols, which are symbols to be transferred to a molded product in a single injection molding, are arranged in the longitudinal direction of the belt-like base material sheet in a cavity composed of A mold and B mold. arranged to the front and rear area of the unit pattern in the continuous transfer sheet comprising a clamp for pressing the part surface of the a mold, a molding simultaneous transfer mold for transferring the same time unit symbol and injection molded into molded articles,
The running direction of the continuous transfer sheet is the front-rear direction, the direction orthogonal to the front-rear direction is the left-right direction,
The clamp comprises a front clamp extending in the left-right direction and a rear clamp extending in the left-right direction,
In a partial length region in the left-right direction of the front clamp, a front tension applying member provided to protrude toward the A mold side is provided.
A rear tension applying member provided to protrude to the A mold side in a partial length region in the left-right direction of the rear clamp;
In-mold transfer mold having a receiving groove after the rear tensioning member and before receiving groove in the secondary part surface of the A mold before tensioning member is housed is housed,
A front raising member that is positioned before the front clamp, abuts against a partial length region in the left-right direction of the continuous transfer sheet, and raises the continuous transfer sheet from the secondary part surface of the A mold to the B mold side;
A rear raising member located behind the rear clamp and contacting a partial length region in the left-right direction of the continuous transfer sheet to raise the continuous transfer sheet from the secondary part surface of the A mold to the B mold side. molding simultaneous transfer mold to be. A continuous transfer sheet in which a plurality of unit symbols, which are symbols to be transferred to a molded product in a single injection molding, are arranged in the longitudinal direction of the belt-like base material sheet in a cavity composed of A mold and B mold. A transfer sheet feeding device comprising a sheet side guide roller and a take-up side guide roller, and A mold, B mold and the front and back area of the unit symbol in the continuous transfer sheet on the part surface of the A mold In a molding simultaneous transfer molding device comprising a molding simultaneous transfer mold having a clamp for pressing,
The running direction of the continuous transfer sheet is the front-rear direction, the direction orthogonal to the front-rear direction is the left-right direction,
The clamp comprises a front clamp extending in the left-right direction and a rear clamp extending in the left-right direction,
The sheet-side guide roller has a columnar shape, and has a rear raised ring portion that is a partial spherical portion having a longer rotation radius than the columnar portion, occupying a part of a rotation axis length region extending to the left and right of the sheet-side guide roller. And
The winding-side guide roller has a cylindrical shape, and has a front raised ring portion that is a spherical portion that has a longer rotation radius than the cylindrical portion and occupies a portion of the length region of the rotational axis extending to the left and right of the cylindrical guide roller. And
In the continuous transfer sheet, the region connecting the portion that contacts the front raised ring and the portion that contacts the rear raised ring is raised from the secondary part surface of the A mold to the B mold side,
In a partial length region in the left-right direction of the front clamp, a front tension applying member provided to protrude toward the A mold side is provided.
A rear tension applying member provided to protrude to the A mold side in a partial length region in the left-right direction of the rear clamp;
A molding apparatus for simultaneous molding having a front receiving groove in which a front tension applying member is accommodated and a rear receiving groove in which a rear tension adding member is accommodated on the secondary part surface of the A mold. A continuous transfer sheet in which a plurality of unit symbols, which are symbols to be transferred to a molded product in a single injection molding, are arranged in the longitudinal direction of the belt-like base material sheet in a cavity composed of A mold and B mold. A transfer sheet feeding method for simultaneous molding and transferring, wherein the unit design is transferred to the molded product at the same time as injection molding ,
Among the plurality of unit symbols, the unit symbol arranged in the cavity is a specific unit symbol,
A mold in which the running direction of the continuous transfer sheet is a front-rear direction, and a direction perpendicular to the front-rear direction is a left-right direction ,
A front raised portion that is a part of the continuous transfer sheet and is located in front of the pre-tension applying region and is arranged to raise a front raised region, which is a partial length region in the left-right direction, to the B mold side. And a part of the continuous transfer sheet, which is located after the post-tension applying area and is arranged to raise the rear raising area, which is a partial length area in the left-right direction, to the B mold side. Using a mold with post-lifting means ,
A transfer sheet feeding method comprising the following steps.
(B) A step of arranging a specific unit design of the continuous transfer sheet on the dividing surface of the A mold and the B mold, and arranging the base sheet in contact with the front raising means and the rear raising means .
(B) A step performed after the arrangement step , wherein the front tension application region which is between the front raised region and the front end of the specific unit symbol and is a partial length region in the left-right direction is pressed against the A mold side,
A tension applying step of applying a tension to the continuous transfer sheet by pressing the rear tension applying region, which is between the rear raised region and the rear end of the specific unit symbol and is a partial length region in the left-right direction, to the A mold side.
C. Clamp operation step of pressing the front and rear regions of the specific unit design on the continuous transfer sheet against the secondary part surface of the A mold in a state where the tension is applied by the tension applying step.
(D) a pressure reducing adhesion step in which the space between the continuous transfer sheet and the cavity surface of the A mold is depressurized and the specific unit pattern portion of the continuous transfer sheet is brought into close contact with the cavity surface of the A mold in the pressing state in the clamping operation process. .

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