JP2013067079A - Transportation assist tool and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transportation assist tool that more surely prevents the displacement of a label while achieving the suppression of damage to the label, and a method for manufacturing the same.SOLUTION: A long side surface molding part 31, which molds the outer surface of a long-side sidewall 8, of a mold device 21 for molding a box-shaped container 1 is formed with a storage recess 32 on the molding surface that defines a cavity 25, and also, is provided with a moving block 41 fitted into the storage recess 32. The moving block 41 is formed with a slit 35 that is configured to allow suction of air in the cavity 25 and to allow a label 11 to be sucked on the molding surface of the moving block 41. The moving block 41 is configured to be displaceable between the retreat position where the whole of the label 11 sucked on the molding surface of the moving block 41 is located at the inside of the storage recess 32 and the molding position where the whole of the label 11 sucked on the molding surface of the moving block 41 is located on the outside of the storage recess 32.

Description

  The present invention relates to a transport aid such as a box-type container or a pallet used for transporting an article and a method for manufacturing the same.

  Conventionally, a transport aid such as a box-shaped container or a pallet is used when a plurality of articles are collected together or an article whose posture is difficult to be stabilized or a fragile article is transported in a stable state. In addition, when predetermined information (company name, product name, etc.) is attached to such a transportation aid, the predetermined information is printed on the surface of the cavity of the mold apparatus for molding the transportation aid. There is a technique in which a display surface with the predetermined information is formed at the same time as the transport aid by filling and solidifying a molten thermoplastic resin after installing the label (in-mold label) .

  By the way, when the molten resin is filled in the cavity, the molten resin injected into the cavity strikes the edge of the label vigorously, so that the label is bent, the label is displaced, or the label is wrinkled. It may occur.

  On the other hand, by forming a recess capable of accommodating the label in the molding surface forming the cavity, the collision of the molten resin injected into the cavity with the edge of the label is avoided. (See, for example, Patent Document 1).

JP 2004-34372 A

  However, when the said recessed part is formed like the said patent document 1, in a conveyance assistance tool, a label will be provided in the convex part of a conveyance assistance tool. For this reason, it becomes easy for other articles or the like to collide with or rub against the label in a protruding position from the surface, and there is a possibility that the deterioration of the label is accelerated and the appearance quality is deteriorated.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to more reliably prevent the label from being displaced and suppress the damage to the label. And a manufacturing method thereof.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to a corresponding means are added as needed.

Means 1. A method for manufacturing a transport aid having a placement portion on which an article can be placed and having a display surface for displaying predetermined information,
A mold apparatus having a plurality of molds for forming a cavity for molding the transport aid, an injection apparatus for injecting a molten thermoplastic resin into the cavity, and air in the cavity can be sucked Using a suction device,
An installation step of installing a label with respect to a portion for molding the display surface of the molding surface of the mold defining the cavity;
A filling step of filling the cavity in which the label is installed with a molten resin;
By going through a solidification step of solidifying the molten resin filled in the cavity,
A transportation aid having the above-described placement portion and having the display surface on which the predetermined information is displayed by the label is integrally formed,
In the mold, a gate for introducing molten resin supplied from the injection device into the cavity is formed on a molding surface that defines the cavity,
A portion of the mold that molds the display surface is provided with a housing recess on the molding surface that defines the cavity, and a moving block that is fitted into the housing recess,
A first suction hole that communicates with the suction device is formed in the housing recess, and a second suction hole that communicates with the first suction hole is formed on a molding surface that defines the cavity of the moving block. Formed and configured to be capable of sucking the air in the cavity through the first suction hole and the second suction hole by the suction device,
The moving block is retracted so that the whole label adsorbed on the molding surface of the moving block via the first suction hole and the second suction hole by the suction force of the suction device is located inside the housing recess. It is configured to be displaceable between a position and a molding position where the entirety of the label adsorbed on the molding surface is located outside the housing recess,
The filling process is started with the moving block in the retracted position, and the molten resin injected into the cavity is filled beyond the side of the gate side of the label, and then the moving is performed. A method for manufacturing a transportation aid, wherein a block is set as the molding position.

  According to the means 1, by filling the cavity with the molten resin with the moving block as the retracted position, it is possible to avoid a situation in which the molten resin injected into the cavity collides with the edge of the label. . Thereby, it is possible to prevent the label from being lifted, misaligned, wrinkled, and the like. In particular, the width of the cavity formed between the label adsorbed on the moving block in the retracted position of the cavity and the molding surface facing the label is the opening peripheral edge of the housing recess and molding facing this When the width is larger than the width of the cavity formed between the surface and the surface, the flow rate of the molten resin to the portion where the label is installed can be reduced, and this effect is more reliably exhibited.

  Further, after the molten resin is filled into the cavity until the side of the label on the gate side is exceeded, the moving block is displaced to the molding position. That is, if the molten resin is filled into the cavity until it exceeds the side of the label on the gate side, the label is pressed against the molding surface of the mold (moving block) by the already filled molten resin. It becomes. For this reason, even if the moving block is displaced from the retracted position to the molding position and the label is positioned outside the housing recess, the label can be prevented from being lifted.

  Furthermore, since the transport aid is molded with the moving block in the molding position (solidification of the molten resin is completed), in the manufactured transport aid, the label protrudes from the surface of the transport aid. The situation can be avoided. Therefore, it is possible to reliably obtain a transport aid that does not lift the label and does not protrude from the surface of the transport aid.

  In the transport aid, compared to the label protruding from the surface of the transport aid, the chance of the label hitting or rubbing against other members can be reduced, and the durability can be improved. Can be planned. In particular, when the transport aid is configured to be capable of stacking at least one of stacking and nesting, the stacking can be performed relatively smoothly without the label being caught. It can be carried out. Furthermore, since the label does not protrude from the surface of the transport aid, the transport aid can be stacked more compactly, and the situation where the label is rubbed by the stacked transport aid can be suppressed. it can.

further,
Further, for example, it is possible to avoid a situation in which an unnecessary part is formed as compared with a case where the solidification process is performed while the moving block is in the retracted position. It is possible to prevent various inconveniences such as the occurrence of molding distortion (sink marks) due to the decrease in the functionality of the material and the increase in the thickness of the transport aid.

  Note that “predetermined information” refers to information related to goods transported by transport aids (such as the name of the company that manufactures and sells goods, the product name of the goods, etc.), and information related to transport (name of the company that transports the goods). Etc.), information related to transportation aids (company name, product name, etc. of the manufacturer and distributor of transportation aids) and information displayed by printing on the label surface such as illustrations that improve design Not only that, but also information that can be recognized by the shape and installation position of the label (such as being able to grasp the direction of the transportation aid) is included.

Mean 2. The moving block includes a main body having a recess on the molding surface side defining the cavity, and a nest inserted in the recess,
The main body is formed with a communication hole that allows the bottom surface of the recess to communicate with the first suction hole.
By inserting the insert into the recess, the second suction hole communicating with the communication hole is formed between the molding surface that defines the cavity of the insert and the opening peripheral edge of the recess. The method for manufacturing a transport aid according to means 1, wherein the slit is formed.

  According to the means 2, the slit for sucking the label can be formed in a frame shape without any break on the molding surface of the moving block, and the label can be firmly and well adsorbed to the molding surface of the moving block. Therefore, even when the moving block is displaced, it is possible to more reliably prevent label displacement and the like.

  Means 3. The method for manufacturing a transport aid according to means 1 or 2, wherein the moving block is displaced from the retracted position to the molding position at a timing before the molten resin is filled in the cavity.

  According to the means 3, the moving block is displaced from the retracted position to the molding position before the cavity is filled with the molten resin. For this reason, for example, when the moving block is displaced to the molding position after the cavity is filled with the molten resin, it is caused by the pressure of the molten resin filling the cavity, such as relatively difficult to displace the moving block. It is possible to avoid a situation in which various problems occur, or a molten resin that becomes extra in the cavity and needs to be discharged out of the cavity is generated in a relatively large amount.

Means 4. A transport aid formed by the manufacturing method according to any one of the above means 1 to 3,
The part including the surface of the label formed by the moving block is flush with the part formed by the opening peripheral part of the receiving recess or the part formed by the opening peripheral part of the receiving recess. A transport aid characterized by that.

  According to the means 4, since the label is provided on the same surface as the surface of the transport aid or a position where the label is immersed, the situation where the label hits or rubs against other members or the floor surface is suppressed. Can do. Further, by manufacturing as described in the above means 1 and the like, it is possible to prevent label displacement and the like, and to reduce the occurrence of defective products.

It is sectional drawing of a box-shaped container. (A) is a fragmentary sectional view which shows the nested box-type container, (b) is an enlarged view which shows the J section of (a). It is a fragmentary sectional view which shows the metal mold | die apparatus which has a moving block in a retracted position. It is a fragmentary sectional view showing a metallic mold device in which a movement block is in a molding position. It is a cross-sectional schematic diagram which shows the state which decomposed | disassembled the metal mold apparatus. It is a fragmentary sectional view of the metallic mold device in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, a box-shaped container 1 as a transportation aid includes a bottom wall portion 2 having a substantially rectangular plate shape having a pair of opposed long side portions and a pair of opposed short side portions, and a bottom wall portion. 2 is provided with a substantially square cylindrical peripheral wall portion 3 extending upward from the outer peripheral edge 2 and an overhang portion 4 projecting from the upper edge portion of the peripheral wall portion 3 in the outer peripheral direction of the peripheral wall portion 3. Is formed. The box-type container 1 of the present embodiment is made of polypropylene.

  The peripheral wall portion 3 extends upward from each of the long side portions 8 of the bottom wall portion 2 and extends upward from each of the short side portions of the bottom wall portion 2. It is comprised from a pair of short side wall part 9 which connects between the side edge parts of the side wall part 8. Further, the peripheral wall portion 3 extends slightly inclined toward the outer peripheral side toward the upper side. And in this embodiment, as shown in FIG. 2, the bottom wall part 2 of the upper box-type container 1 of the surrounding wall part 3 of the lower box-type container 1 is made by stacking the box-shaped containers 1 up and down. It is accommodated on the inner peripheral side and is configured such that the outer peripheral surface of the peripheral wall portion 3 of the upper box-shaped container 1 and the inner peripheral side of the peripheral wall portion 3 of the lower box-shaped container 1 abut. Thereby, a plurality of box-shaped containers 1 can be compactly stacked (nested) while preventing the horizontal displacement of the upper box-shaped container 1 with respect to the lower box-shaped container 1. .

  In the present embodiment, predetermined information (company name, product name, etc.) is displayed on the outer surface of the long side wall 8. As will be described in detail later, in this embodiment, the label 11 (in-mold label) made of polypropylene and having the predetermined information printed on the surface thereof is exposed on the outer surface of the long side wall 8. The predetermined information is displayed by insert molding. In the present embodiment, the outer surface of the long side wall portion 8 constitutes the display surface, and the bottom wall portion 2 (the upper surface of the bottom wall portion 2) constitutes the placement portion.

  The label 11 has a substantially rectangular shape, and is provided so that the upper side and the lower side thereof are parallel to the upper side and the lower side of the long side wall 8. Moreover, the site | part in which the label 11 is provided among the outer surfaces of the long side wall part 8 is provided in the position where it was immersed in the inner peripheral side of the surrounding wall part 3 a little rather than the outer surface of the surrounding long side wall part 8. Yes.

  Next, a mold apparatus 21 for forming the box-shaped container 1 will be described with reference to FIG. The mold apparatus 21 includes a female mold 22 that forms the outer surface side of the box-type container 1 such as the lower surface of the bottom wall portion 2 and the outer peripheral surface of the peripheral wall portion 3, and the upper surface of the bottom wall portion 2 and the inner peripheral surface of the peripheral wall portion 3. And a male mold 23 for molding the inner surface side of the box-shaped container 1. The molds 22 and 23 are respectively formed with molding surfaces corresponding to the surface shape of the box-type container 1, and a cavity 25 for molding the box-type container 1 is formed by these molding surfaces. Further, a portion of the female mold 22 where the lower surface of the bottom wall portion 2 is molded has a gate 27 communicating with the cavity 25 and a sprue that communicates with the gate 27 and is engaged with a nozzle tip of an injection device (not shown). 28 are formed.

  Further, as shown in FIG. 5 and the like, a portion of the female die 22 for molding the outer surface and the like of the long side wall portion 8 (hereinafter referred to as a long side molding portion 31) is formed on the molding surface that defines the cavity 25. A rectangular housing recess 32 is formed, and a moving block 41 is fitted into the housing recess 32. The long side surface forming portion 31 is formed with a suction hole 33 that allows communication between the bottom surface of the housing recess 32 and the surface opposite to the surface on which the housing recess 32 is formed. In the present embodiment, the suction hole 33 corresponds to the first suction hole.

  The moving block 41 includes a main body 42 in which a rectangular recess 43 is formed on the molding surface that defines the cavity 25, and a nest 44 that is fitted into the recess 43. The main body 42 is formed with a communication hole 45 that allows communication between the bottom surface of the recess 43 and the surface opposite to the surface on which the recess 43 is formed. Thereby, the suction hole 33 of the long side surface forming part 31 and the communication hole 45 of the main body part 42 of the moving block 41 communicate with each other.

  The nest 44 basically has a substantially rectangular parallelepiped shape so as to fit in the recess 43 of the main body 42. The molding surface of the nest 44 that forms the cavity 25 is substantially similar to that of the label 11. It has a shape. Further, when the nest 44 is accommodated in the recess 43 until it comes into contact with the bottom surface of the recess 43, the molding surface of the nest 44 is flush with the molding surface of the main body 42. However, in this embodiment, a gap of about 0.02 mm to 0.05 mm is formed between the molding surface of the insert 44 and the opening peripheral edge of the recess 43. In other words, the slit 35 communicating with the communication hole 45 is formed on the molding surface of the moving block 41 so as to extend in a substantially square frame shape. The insert 44 is detachably attached to the female mold 22 by attachment means (not shown).

  The moving block 41 has a substantially rectangular parallelepiped shape corresponding to the inner peripheral shape of the housing recess 32. In addition, a gap between the outer peripheral surface of the moving block 41 (main body portion 42) and the inner peripheral surface of the housing recess 32 is smaller than the gap between the molding surface of the insert 44 and the opening peripheral edge of the recess 43. Is formed. In addition, the outer dimension of the molding surface of the moving block 41 (main body part 42) is configured to be slightly larger than the outer dimension of the label 11.

  Further, a suction device such as a vacuum pump (not shown) is connected (communication) to the suction hole 33 of the long side surface forming portion 31. When the suction device is driven, air in the cavity 25 is sucked through the suction hole 33, the communication hole 45, and the slit 35. Since the slit 35 has a width of about 0.02 mm to 0.05 mm, air can pass through the slit 35, but molten polypropylene (hereinafter referred to as molten resin) cannot pass through the slit 35. It has become.

  Now, the moving block 41 of the present embodiment is configured to be slidable in the direction of appearing and retracting from the housing recess 32, and is connected to a driving device such as a hydraulic cylinder (not shown) via a rod 47. Further, the width of the moving block 41 in the displacement direction is shorter than the depth of the receiving recess 32, and the moving block 41 (main body portion 42) is brought into contact with the bottom surface of the receiving recess 32 as shown in FIG. In this state, the entire label 11 adsorbed on the molding surface of the moving block 41 is configured to be accommodated inside the accommodating recess 32. Hereinafter, the position of the moving block 41 in contact with the bottom surface of the housing recess 32 is referred to as a “retracted position”. In addition, in the present embodiment, the width of the cavity 25 between the label 11 adsorbed by the moving block 41 in the retracted position and the molding surface facing the label 11 is equal to the opening peripheral edge of the housing recess 32, The width is larger than the width of the cavity 25 formed between the facing molding surface.

  Further, as shown in FIG. 4, the moving block 41 is configured to be displaceable to a position where the molding surface of the moving block 41 protrudes to the inside of the cavity 25 from the opening peripheral edge of the housing recess 32. Thus, the displacement of the moving block 41 toward the cavity 25 causes the entire label 11 adsorbed on the molding surface of the moving block 41 to be disposed inside the cavity 25 rather than the opening peripheral edge of the housing recess 32. The Rukoto. Hereinafter, the position of the moving block 41 where the molding surface protrudes to the inside of the cavity 25 from the opening peripheral edge of the housing recess 32 is referred to as “molding position”.

  Next, a method for manufacturing the box-shaped container 1 will be described. First, while the mold device 21 is opened, the suction device is driven, the molding surface of the moving block 41 is covered with the entire molding surface (slit 35) of the insert 44, and the main body 42 is molded. The label 11 is placed so that the printing surface is in contact with the molding surface of the moving block 41 so as to be accommodated on the inner peripheral side of the outer peripheral edge of the surface. Thereby, the label 11 is sucked by the suction device through the slit 35, the communication hole 45, the suction hole 33, and the like, and the label 11 is held (adsorbed) in a state of being in close contact with the molding surface of the moving block 41. It will be. In particular, in the present embodiment, the shape of the label 11 and the shape of the molding surface of the insert 44 are substantially similar, and the label 11 extends from the slit 35 to the outer peripheral side from the slit 35 over the entire circumference. It is installed so that it protrudes about 0 mm. In the present embodiment, at the stage where the label 11 is placed on the molding surface of the moving block 41 (stage where the mold is opened), the moving block 41 is configured to exist at the molding position.

  Subsequently, the mold is clamped while the label 11 is sucked by the suction device. In the present embodiment, when the mold clamping is performed, the moving block 41 is configured to be displaced to the retracted position. Then, after the moving block 41 is displaced to the retracted position, the molten resin is filled into the cavity 25 through the sprue 28 and the gate 27 formed in the female mold 22 by the injection device.

  Further, in the present embodiment, in the cavity 25, when the molten resin is filled beyond the lower side portion of the label 11 on the gate 27 side and further slightly above the upper side portion of the label 11, the retracted position is reached. The movable block 41 is configured to be displaced to the molding position. Then, after the filling of the molten resin into the cavity 25 is completed, the process proceeds to a step of solidifying the molten resin.

  After the solidification is completed, the box-shaped container 1 formed by opening the mold is removed from the mold apparatus 21. As described above, the bottom wall portion 2, the peripheral wall portion 3, the overhang portion 4, and the like described above are provided, and the outer surface of the long side wall portion 8 protrudes outward from the long side wall portion 8. The box-shaped container 1 on which the predetermined information is displayed is obtained by the exposed label 11.

  As described above in detail, according to this embodiment, the cavity 25 is filled with the molten resin after the moving block 41 is set to the retracted position. For this reason, the situation where the molten resin injected into the cavity 25 collides with the lower side of the label 11 vigorously can be avoided. Thereby, it is possible to prevent the label 11 from being lifted, misaligned, wrinkled, and the like. In particular, in the present embodiment, the width of the cavity 25 formed between the label 11 adsorbed by the moving block 41 in the retracted position of the cavity 25 and the molding surface facing the label 11 is set to the accommodation recess 32. Since the width of the cavity 25 formed between the peripheral edge of the opening and the molding surface facing this is larger, the flow rate of the molten resin into the portion where the label 11 is installed is reduced. This effect can be achieved more reliably.

  In the present embodiment, the movable block 41 that is in the retracted position is displaced to the molding position when the molten resin is filled in the cavity 25 slightly beyond the upper side of the label 11. That is, if the molten resin is filled in the cavity 25 up to the installation position of the label 11, the label 11 is pressed against the molding surface of the moving block 41 by the already filled molten resin. For this reason, even if the moving block 41 is displaced from the retracted position to the forming position and the label 11 is positioned outside the housing recess 32, the label 11 can be prevented from being lifted.

  Further, since the box-shaped container 1 is formed with the moving block 41 in the molding position (solidification of the molten resin is completed), the label 11 is attached to the surface of the box-shaped container 1 in the manufactured box-shaped container 1. Can be avoided. Therefore, it is possible to reliably obtain the box-shaped container 1 in which the label 11 is not lifted and the label 11 does not protrude from the surface of the box-shaped container 1 (in this example, the outer surface of the long side wall portion 8).

  The box-type container 1 can reduce the chance that the label 11 hits or rubs against other members or the like, as compared with the case where the label 11 protrudes from the surface of the box-type container 1. The improvement etc. can be aimed at. In particular, in the present embodiment, the box-shaped container 1 is configured so that nesting can be performed, but the label 11 is not caught during stacking, and the stacking can be performed relatively smoothly. . Furthermore, since the labels 11 do not protrude from the surface of the box-shaped container 1, the box-shaped containers 1 can be stacked more compactly, and the labels 11 are rubbed by the stacked box-shaped containers 1 Can be suppressed.

  Further, for example, compared to a case where the solidification process is performed with the moving block 41 in the retracted position, a situation in which an unnecessary part is formed can be avoided, and the box shape is achieved while saving resources. Various problems such as a decrease in functionality of the container 1 and generation of molding distortion (sink) due to an increase in the thickness of the box-shaped container 1 can be prevented.

  Furthermore, since the moving block 41 is displaced from the retracted position to the molding position before the cavity 25 is filled with the molten resin, for example, after the filling of the molten resin into the cavity 25 is completed, the moving block 41 is moved to the molding position. As in the case where the moving block 41 is displaced toward the outside, various troubles caused by the pressure of the molten resin filling the cavity 25 such as making it relatively difficult to displace the moving block 41 are caused. It is possible to avoid a situation in which a relatively large amount of molten resin that must be discharged is generated.

  In addition, the moving block 41 is configured by inserting a nest 44 into the main body 42 in which the recess 43 is formed. Thereby, the slit 35 for sucking the label 11 can be formed in a frame shape on the molding surface of the moving block 41, and the label 11 can be firmly and firmly adsorbed to the molding surface of the moving block 41 in a balanced manner. it can. Therefore, even when the moving block 41 is displaced, it is possible to prevent the positional deviation of the label 11 more reliably.

  In forming the box-shaped container 1, when the label 11 is placed on the molding surface of the moving block 41, when the label 11 is placed over 5.0 mm from the slit 35 to the outer peripheral side, the label 11 There is a possibility that the holding force due to the suction of the suction device may be difficult to reach the outer peripheral edge 11 protruding. On the other hand, when the protruding length of the label 11 from the slit 35 is less than 1.0 mm, the part of the label 11 sucked into the slit 35 is slightly pulled toward the slit 35 side, etc. The slit 35 and the label 11 are not properly adsorbed (a gap is formed between the peripheral edge of the slit 35 and the label 11 and air flows into the slit 35 from there) and the holding is insufficient. There is a possibility.

  In this regard, in this embodiment, the label 11 is installed so as to protrude about 2.0 mm to 5.0 mm on the outer peripheral side across the slit 35 over the entire outer peripheral edge. Thereby, the air gap between the label 11 and the peripheral edge of the slit 35 does not enter the slit 35, and the label 11 can be reliably held by the suction force of the suction device, and the outer periphery of the label 11 can be held. Can also exert sufficient holding power. Therefore, the label 11 can be adsorbed and held more stably.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the movable block 41 at the retracted position is displaced to the molding position when the molten resin is filled in the cavity 25 slightly above the upper side of the label 11. However, the moving block 41 may be displaced to the molding position after the molten resin is filled in the cavity 25 to the upper side of the lower side portion of the label 11 on the gate 27 side.

  (B) In the above embodiment, the moving block 41 in the molding position has a molding surface protruding inside the cavity 25 from the opening peripheral edge of the housing recess 32, but as shown in FIG. The moving block 41 may be configured such that the molding surface of the moving block 41 is flush with the opening peripheral edge of the housing recess 32. In this case, in the manufactured box-type container 1, the surface of the label 11 and the outer surface of the long side wall 8 are flush with each other.

  (C) In the above embodiment, the moving block 41 is configured to exist at the molding position when the label 11 is placed on the molding surface of the moving block 41. However, the present invention is particularly limited to such a configuration. Instead, it may be configured to exist at the retracted position, or may be configured to exist at a position where the molding surface of the moving block 41 and the opening peripheral edge of the housing recess 32 are flush with each other. However, the molding surface of the moving block 41 is labeled on the molding surface of the moving block 41 by making the molding surface of the moving block 41 flush with the opening periphery of the receiving recess 32 or projecting toward the cavity 25 from the opening periphery of the receiving recess 32. 11 can be easily performed. When the molding surface of the moving block 41 and the surface of the label 11 have substantially the same shape, the label 11 (on the side opposite to the suction surface) is placed at the stage where the label 11 is placed on the molding surface of the moving block 41. This installation workability can also be improved by configuring such that the surface of the molded article, that is, the buried surface opposite to the surface exposed in the molded product) is flush with the opening peripheral edge of the housing recess 32. be able to.

  (C) In the above embodiment, the rectangular frame-shaped slit 35 is formed between the insert 44 and the opening peripheral edge of the recess 43 by inserting the insert 44 into the recess 43 formed in the moving block 41. However, it is not particularly limited to such a configuration. For example, the nest 44 and the recess 43 may be omitted, and a hole or slit penetrating the moving block 41 may be formed. However, by providing the nesting 44, the slit 11 for sucking the label 11 can be formed in a frame shape on the molding surface of the moving block 41, and the label 11 can be adsorbed more firmly.

  Moreover, in the said embodiment, it does not specifically limit about the shape of the nest | insert 44, For example, without forming the groove | channel in parts other than the molding surface which comprises the cavity 25, and raising the suction power of suction apparatus itself, The force for sucking the label 11 may be increased.

  Further, in FIG. 3 and the like, the box-shaped container 1 is formed by the mold device 21 in the direction in which the box-shaped container 1 opens upward. For example, the direction in which the box-shaped container 1 opens in the lateral direction ( You may comprise so that it may shape | mold in the direction where the bottom wall part 2 is extended up and down. Moreover, in the said embodiment, although the gate 27 is formed in the mold apparatus 21 in the position which shape | molds the bottom wall part 2 (the lower surface) of the box-type container 1, it is limited especially to such a structure. is not. For example, the slit 11 can be formed on the molding surface on which the gate 27 is formed, and the label 11 can be installed.

  (D) Moreover, in the said embodiment, although the label 11 comprises rectangular shape and the upper side part lower side part is arrange | positioned so that it may be parallel to the upper side part and lower side part of the long side wall part 8, the label 11 The shape, size, installation direction, and the like of the label 11 are not particularly limited. For example, the side portion may be bent or curved (the label 11 is circular), or each side of the label 11 may be curved. The portions may be arranged so as to be inclined with respect to the upper side portion and the lower side portion of the long side wall portion 8.

  Furthermore, in the said embodiment, although the label 11 is provided corresponding to the outer surface of the long side wall part 8, it is not limited to such a structure in particular, The inner surface of the long side wall part 8, It is also possible to provide on the outer surface / inner surface of the short side wall portion 9, the upper surface / lower surface of the bottom wall portion 2, the upper surface of the overhang portion 4, and the like. In addition, the number of labels 11 provided in the box-type container 1 and the number of wall portions provided with the labels 11 exposed are not particularly limited. For example, the long side wall portions 8 and the short side walls 8 are provided. It is good also as providing the label 11 in all the outer surfaces of the side side wall part 9. FIG.

  (E) In the above embodiment, the label 11 is installed on the molding surface of the moving block 41 so that the entire outer peripheral edge of the label 11 is positioned on the outer peripheral side of the slit 35. Is not to be done. However, at least a portion of the label 11 on the gate 27 side (corresponding to a portion on the lower side in the above embodiment) straddles the slit 35 (in the above embodiment, protrudes downward across the slit 35), and the label 11 Of these, it is desirable that the length protruding the slit 35 is in the range of 1.0 mm to 5.0 mm.

  (F) In the above embodiment, it is embodied in the box-type container 1, but it may be applied to a transport aid used for transporting and storing articles, for example, a tray having a shallow bottom and a bottomed cylinder. It can also be applied to shaped containers, pallets and the like.

  Moreover, in the said embodiment, although the box-shaped containers 1 are comprised so that nesting is possible, both the conveyance assistance tool in which stacking is possible, the conveyance assistance tool in which both nesting and stacking are possible, and both nesting and stacking are possible. It is also possible to apply to transportation aids that cannot be performed.

  (G) Moreover, it is not specifically limited as information obtained by visually recognizing the label 11, It can change suitably. For example, information related to the goods transported in the box-shaped container 1 (such as the name of the company that manufactures and sells the goods, the product name of the goods), information related to transportation (such as the name of the company that transports the goods), and the box-shaped container 1 (information such as the name of the company that manufactures and sells the box-shaped container 1 and the product name of the box-shaped container 1), illustrations that improve design, and the like. Further, not only the information displayed by printing the surface of the label 11 but also information that can be recognized by the shape and installation position of the label 11 (eg, the orientation of the box-shaped container 1 can be grasped) is included.

  (H) In the above embodiment, the box-shaped container 1 is made of polypropylene, but may be made of other resin materials (thermoplastic resin) such as polyethylene, PET, and polyamide. Moreover, although the label 11 is comprised by the polypropylene film, it is good also as comprising by other resin materials, such as a polyethylene film and a nylon film. In the above embodiment, since the constituent materials of the box-shaped container 1 main body and the label 11 are the same, the recyclability can be improved.

  DESCRIPTION OF SYMBOLS 1 ... Box type container, 2 ... Bottom wall part, 8 ... Long side side wall part, 11 ... Label, 21 ... Mold apparatus, 22 ... Female mold, 23 ... Male type, 25 ... Cavity, 27 ... Gate, 31 ... Long side surface forming part, 32 ... accommodating concave part, 33 ... suction hole, 35 ... slit, 41 ... moving block, 42 ... main body part, 43 ... concave part, 44 ... nested, 45 ... communication hole.

Claims (4)

A method for manufacturing a transport aid having a placement portion on which an article can be placed and having a display surface for displaying predetermined information,
A mold apparatus having a plurality of molds for forming a cavity for molding the transport aid, an injection apparatus for injecting a molten thermoplastic resin into the cavity, and air in the cavity can be sucked Using a suction device,
An installation step of installing a label with respect to a portion for molding the display surface of the molding surface of the mold defining the cavity;
A filling step of filling the cavity in which the label is installed with a molten resin;
By going through a solidification step of solidifying the molten resin filled in the cavity,
A transportation aid having the above-described placement portion and having the display surface on which the predetermined information is displayed by the label is integrally formed,
In the mold, a gate for introducing molten resin supplied from the injection device into the cavity is formed on a molding surface that defines the cavity,
A portion of the mold that molds the display surface is provided with a housing recess on the molding surface that defines the cavity, and a moving block that is fitted into the housing recess,
A first suction hole that communicates with the suction device is formed in the housing recess, and a second suction hole that communicates with the first suction hole is formed on a molding surface that defines the cavity of the moving block. Formed and configured to be capable of sucking the air in the cavity through the first suction hole and the second suction hole by the suction device,
The moving block is retracted so that the whole label adsorbed on the molding surface of the moving block via the first suction hole and the second suction hole by the suction force of the suction device is located inside the housing recess. It is configured to be displaceable between a position and a molding position where the entirety of the label adsorbed on the molding surface is located outside the housing recess,
The filling process is started with the moving block in the retracted position, and the molten resin injected into the cavity is filled beyond the side of the gate side of the label, and then the moving is performed. A method for manufacturing a transportation aid, wherein a block is set as the molding position. The moving block includes a main body having a recess on the molding surface side defining the cavity, and a nest inserted in the recess,
The main body is formed with a communication hole that allows the bottom surface of the recess to communicate with the first suction hole.
By inserting the insert into the recess, the second suction hole communicating with the communication hole is formed between the molding surface that defines the cavity of the insert and the opening peripheral edge of the recess. The method for manufacturing a transportation aid according to claim 1, wherein the slit is formed.   The method for manufacturing a transport aid according to claim 1 or 2, wherein the moving block is displaced from the retracted position to the molding position at a timing before the cavity is filled with molten resin. A transport aid formed by the manufacturing method according to any one of claims 1 to 3,
The part including the surface of the label formed by the moving block is flush with the part formed by the opening peripheral part of the receiving recess or the part formed by the opening peripheral part of the receiving recess. A transport aid characterized by that.

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