TWI794024B - Shell expansion of packing box and mold thereof and manufacturing method thereof - Google Patents

Abstract

A shell expansion of packing box is provided, including a plurality of first plates and a plurality of second plates which are made by plastic material. The plurality of first plates has at least one feeding portion which is corresponded to at least one gate. Each the second plate extends along a length direction. Each the second plate is connected between the two first one plates in a connection direction. The connection direction is perpendicular to the length direction. Each the second plate is thinner than each the first plate. The first plate has a first side and a second side. The first side is connected with the second plate. The at least one gate of at least one of the two first plates is closer the first side than the second side.

Description

Deployment panel of packaging box, its mold and its manufacturing method

The present invention relates to packaging boxes, in particular to a packaging box made of plastic material.

The main purpose of the packaging box is to protect the internal goods, such as dustproof and anti-collision, so that the goods can be kept in the best condition during the process of transportation and sales to consumers or users; among them, due to the easy Processing, printable, recyclable, and can be folded arbitrarily, so the common packaging boxes in daily life are all made of cartons.

There are also many disadvantages in choosing paper for packaging boxes, such as poor waterproof performance and easy to be pierced by sharp objects. At present, there are two ways to bend the unfolded board to form a box: 1. Set various cuts at the preset positions of the unfolded board, In order to facilitate the formation of other cardboard through plug-in connection. 2. Use other connecting elements to connect the cardboards, such as glue, double-sided tape, staples...etc.

However, the first combination method is easy to destroy the original airtightness of the packaging box, and it is easy to have various cardboards interspersed and stacked, resulting in an uneven overall appearance and inconsistent overall dimensions. In the second combination method, additional connection elements are required, resulting in an increase in assembly cost.

Therefore, it is necessary to provide a novel and progressive unfolding panel of a packaging box, its mold and its manufacturing method to solve the above-mentioned problems.

The main purpose of the present invention is to provide an unfolded panel of a packaging box and its mold and its manufacturing method. The finished expanded panel obtained after being produced by an injection mold already has a first panel and a second panel with different thicknesses, so that the first The board can be bent relatively through the second board, and there is no need for folding line processing as in the traditional method, so the overall processing steps can be effectively simplified, and the packaging box after molding can have a waterproof effect, and has a better surface quality and is not easy to break advantages.

To achieve the above purpose, the present invention provides an unfolded panel of a packaging box, comprising: a plurality of first panels and a plurality of second panels. The plurality of first plates are made of plastic material, and the plurality of first plates include at least one feeding portion corresponding to at least one gate; the plurality of second plates are made of plastic material, and each of the second The boards extend along a length direction, each of the second boards is connected between the two first boards in a connection direction, the connection direction is transverse to the length direction, and the thickness of each of the second boards is smaller than that of each of the first boards. The flesh thickness of the first board; wherein, the two first boards connected with the second board respectively define a first side portion and a second side portion at intervals in the connection direction, and the first side The at least one feeding portion of at least one of the two first plates is closer to the first side and farther away from the second side.

To achieve the above object, the present invention further provides a mold for manufacturing the unfolded panel of the above-mentioned packaging box, the mold includes: a first mold part and a second mold part. The first module defines a face, the first module includes a plurality of blocks and a plurality of partition ribs, the plurality of blocks are recessed on the face, each of the partition ribs extends along a length direction, and each of the partition ribs In the connection direction, it is protruded between the bottom surfaces of the two blocks, the top of each partition rib is lower than the surface, and the connection direction is transverse to the length direction; the second module is used to abut against the surface and cover the plurality of blocks; wherein, each of the blocks is provided with at least one gate, and in the connection direction, the at least one gate of at least one of the two blocks on opposite sides of a partition rib is closer to the dividing rib.

In order to achieve the above object, the present invention further provides a method for manufacturing the unfolded panel of the packaging box, which is used to manufacture the unfolded panel of the above-mentioned packaging box. The manufacturing method includes the following steps: providing a mold as described above; providing a Plastic in a molten state; performing an injection molding step, so that the plastic in a molten state enters and fills the plurality of blocks from at least one gate of each block; performing a cooling molding step; performing a drawing step; obtaining a finished product .

The following examples illustrate the possible implementation of the present invention, but are not intended to limit the scope of protection of the present invention. The "one" or "at least one" before the nouns mentioned in the text do not limit the number. It can also be "plural" according to the needs, and the change in the number is also within the scope of protection, which will be described first.

Please refer to FIG. 1 to FIG. 8 , which show an embodiment of the present invention, the unfolded panel of the packaging box of the present invention includes: a plurality of first panels 1 and a plurality of second panels 18 .

The plurality of first boards 1 are made of plastic material, and have many advantages such as dustproof, waterproof, wear-resistant, puncture-resistant, long shelf life, etc. The plurality of first boards 1 include at least one gate 45 for corresponding At least one feeding part 11; wherein, the plastic material is preferably polybutylene succinate (PBS), which is a biodegradable polymer material, which can be decomposed and metabolized by natural microorganisms or enzymes, and finally decomposed into Carbon dioxide and water, in line with existing environmental awareness. Similarly, the plurality of second boards 18 are made of plastic material, which is the same material as the plurality of first boards 1. Each of the second boards 18 extends along a length direction 51, and each of the second boards 18 is in the A connection direction 52 is connected between the two first plates 1, the connection direction 52 is transverse to the length direction 51, the thickness of each second plate 18 is smaller than the thickness of each first plate 1, Therefore, each of the second boards 18 has better bendability, and one of the first boards 1 can be bent relative to the other first board 1 .

It is worth mentioning that, among them, the two first plates 1 connected with the second plate 18 respectively define a first side portion 12 and a second side portion 13 at intervals in the connection direction 52, The first side portion 12 is connected to the second plate 18, the at least one feeding portion 11 of at least one of the two first plates 1 is closer to the first side portion 12 and farther away from the second side portion 13, The advantage of this configuration is that during injection molding, the at least one feeding portion 11 closer to the first side portion 12 can ensure that the molten plastic can preferentially, rapidly and reliably fill the second plate to be formed in the mold The space of 18 ensures that the structure of the formed second plate 18 is continuous and uninterrupted, and the density is uniform, so that the two first plates 1 can be firmly connected with a thinner thickness.

In this embodiment, the plurality of first boards 1 can be further divided into a main board 14 and a plurality of sub-boards. Bending is carried out on the main board 14, and the number of at least one feeding part 11 located on the main board 14 is one. The uniform distribution of movement, and the number of at least one feeding portion 11 located in each of the sub-boards is one, and the position of the feeding portion 11 of each of the sub-boards is between the geometric center and the connecting direction 52 of the sub-board. Between the second board 18 .

More specifically, the plurality of sub-boards further includes a plurality of first sub-boards 15, and the position of the feeding portion 11 of each of the first sub-boards 15 is between the geometry of the first sub-board 15 in the connection direction 52. Between the center and the second board 18, the plurality of first sub-boards 15 are connected to the peripheral side of the main board 14 through the plurality of second boards 18 and can swing and bend relative to the main board 14 to form side walls; One of the two adjacent first sub-boards 15 in the circumferential direction of the main board 14 is provided with at least one first connecting portion 21, and the other is extended with at least one wing plate 17 that can be bent. 17 is provided with at least one second connecting portion 22, one of the at least one first connecting portion 21 and the at least one second connecting portion 22 is a boss, the other is a hole, when the at least one wing plate is bent When 17 faces the first sub-board 15 , the at least one first connecting portion 21 and the at least one second connecting portion 22 can be fitted and connected to each other.

Preferably, the one of the at least one first connecting portion 21 and the at least one second connecting portion 22 which is a convex column is further provided with a resisting portion 24 on the lateral side, and the resisting portion 24 is used to communicate with the at least one first connecting portion. The hole walls of the hole portion of one connecting portion 21 and the at least one second connecting portion 22 abut against each other in the vertical fitting direction, so as to additionally increase the supporting force in different directions and effectively prevent prolapse. In this embodiment, the at least one first connecting portion 21 is provided with the resisting portion 24 protruding laterally, and the resisting portion 24 is used to vertically fit with the hole wall of the at least one second connecting portion 22 against each other.

More specifically, the plurality of first boards 1 further includes a plurality of second sub-boards 16, and the position of the feeding portion 11 of each of the second sub-boards 16 is located between the second sub-boards 16 in the connection direction 52 Between the geometric center and the second plate 18, the second sub-plate 16 is connected to the first sub-plate 15 in a relatively bendable manner through the second plate 18. In the extending direction, the second sub-plate 16 The size of the board 16 is smaller than that of the first sub-board 15 in order to provide a margin space for accommodating the first sub-board 15 on the side. Moreover, at least one third connecting portion 23 is provided on the second sub-board 16, the at least one first connecting portion 21 is a boss, the at least one second connecting portion 22 is a through hole, and the at least one third connecting portion 23 is a boss. The connecting portion 23 is a hole; wherein, when the at least one wing plate 17 is connected to the first sub-board 15, the at least one first connecting portion 21 protrudes from the at least one wing plate 17, and then connects with the first sub-board The second sub-board 16 connected with 15 can be bent toward the first sub-board 15 so that the protruding at least one first connecting portion 21 further embeds the at least one third connecting portion 23, and the first sub-board The plate 15 and the second sub-plate 16 clamp the at least one wing plate 17 together. This structural configuration can not only prevent the at least one wing plate 17 from loosening, but also allow the inner and outer surfaces to have better continuity and better appearance.

Preferably, the expansion panel of the packaging box further includes at least one retaining rib, and the at least one retaining rib protrudes from at least one of the second sub-panel 16 connected with the at least one wing plate 17 and at least one of the main body. When a sub-board 15 and the second sub-board 16 sandwich the at least one wing 17 , the second sub-board 16 is sandwiched between the at least one retaining rib and the first sub-board 15 .

In this embodiment, the outline of the main board 14 is a rectangle, the number of the plurality of first sub-boards 15 is four and each is a rectangle, the number of the plurality of second sub-boards 16 is two and each is a rectangle, and the at least one wing The number of plates 17 is four, two of the second sub-plates 16 are located on the two opposite first sub-plates 15 in the same direction, and four of the wing plates 17 are located on the two sides of the second sub-plates 16 that are not provided with the second sub-plates 16. The two opposite ends of the first sub-board 15 . Moreover, the quantity of the at least one retaining rib is plural, and the plural retaining ribs include four first retaining ribs 31 and two second retaining ribs 32, the length of each of the second retaining ribs 32 is greater than that of each of the first retaining ribs 31 Four of the first retaining ribs 31 are located on the two sides of the two first sub-boards 15 connected with the two wing plates 17, and the two second retaining ribs 32 are respectively located on the opposite sides of the main board 14. The first sub-board 15 without the two wing boards 17 is interposed between the second rib 32 and the second sub-board 16 .

Please refer to another embodiment of Fig. 9, which is different from this embodiment in that the packaging box is further welded by a plastic welding machine. The plastic welding machine is for example but not limited to an ultrasonic plastic welding machine, a high-frequency plastic welding machine machine, and a plurality of welding parts 6 are formed on the packaging box to improve the connection stability.

Please refer to the present embodiment of Fig. 1 to Fig. 8 again, the present invention provides a kind of mold 4 in addition, it is used for manufacturing the unfolded panel of above-mentioned packing box, and this mold 4 comprises: a first mold part 41 and a second mold piece 47.

The first module 41 defines a face 42, the first module 41 includes a plurality of blocks and a plurality of partition ribs 46, the plurality of blocks are recessed in the face 42, and each of the partition ribs 46 extends along the length direction 51 , each of the partition ribs 46 is protruded between the bottom surfaces of the two blocks in the connecting direction 52, and the top of each of the partition ribs 46 is lower than the surface 42 to reserve a space for forming each of the second plates 18 , the connection direction 52 is transverse to the length direction 51 . The second module 47 is used to lean against the face 42 and cover the plurality of blocks; wherein, each of the blocks is provided with at least one gate 45, and on the connection direction 52, it is located on two opposite sides of the separating rib 46. The at least one gate 45 of at least one of the two side blocks is closer to the dividing rib 46 .

In this embodiment, the plurality of blocks includes a main block 43 and a plurality of sub-blocks 44, the number of the at least one gate 45 located in the main block 43 is one, and the gate 45 of the main block 43 The position is located at the geometric center of the main block 43, the number of the at least one gate 45 located in the sub-block 44 is one, and the position of the gate 45 of each sub-block 44 is between Between the geometric center of the sub-block 44 and the partition rib 46, the benefits of using this structural configuration are discussed above, and will not be repeated here.

The present invention also provides a method for manufacturing an unfolded panel of a packaging box, which is used to manufacture the unfolded panel of the above-mentioned packaging box. The manufacturing method includes the following steps: providing the mold 4 as described above; providing a mold in a molten state Plastic: carry out an injection molding step, let the plastic in the molten state enter and fill the plurality of blocks through at least one gate 45 of each block; carry out a cooling molding step; carry out a drawing step; obtain a finished product.

1: first board

11: Feeding department

12: First side

13: Second side

14: Motherboard

15: The first daughter board

16: Second daughter board

17: wing plate

18: Second board

21: The first connecting part

22: The second connecting part

23: The third connecting part

24: Ministry of Resistance

31: The first rib

32: second rib

4: Mold

41: The first module

42: face

43: Main block

44: sub-block

45: gate

46: Partition rib

47: Second module

51: Length direction

52: Connection direction

6: Welding part

Fig. 1 is a schematic diagram of a mold according to an embodiment of the present invention. Fig. 2 is a partially enlarged view of the first module of an embodiment of the present invention. Fig. 3 is a perspective view of a finished product according to an embodiment of the present invention. FIG. 4 is a partially enlarged view of FIG. 3 . Fig. 5 and Fig. 6 are schematic diagrams of folding the unfolded board into a packaging box according to an embodiment of the present invention. FIG. 7 is a cross-sectional view of FIG. 5 . FIG. 8 is a partially enlarged view of FIG. 7 . Fig. 9 is a schematic diagram of manufacturing steps of an embodiment of the present invention. Fig. 10 is a schematic diagram of a packaging box according to another embodiment of the present invention.

1: first board

14: Motherboard

15: The first daughter board

16: Second daughter board

17: wing plate

18: Second board

21: The first connecting part

22: The second connecting part

23: The third connecting part

24: Ministry of Resistance

31: The first rib

32: second rib

Claims (10)

An unfolded panel of a packaging box, comprising: A plurality of first plates are made of plastic material and include at least one feeding portion corresponding to at least one gate; and A plurality of second boards are made of plastic material, each of the second boards extends along a lengthwise direction, and each of the second boards is connected between the two first boards in a connecting direction, the connecting direction being transverse In the longitudinal direction, the flesh thickness of each second plate is smaller than the flesh thickness of each first plate; Wherein, the two first plates connected with the second plate respectively define a first side portion and a second side portion at intervals in the connection direction, the first side portion connects the second plate, The at least one feeding portion of at least one of the two first plates is closer to the first side and farther away from the second side. The unfolded board of the packaging box as described in claim 1, wherein the plurality of first boards are further divided into a main board and a plurality of sub-boards, the plurality of sub-boards are arranged around the main board, and the plurality of sub-boards pass through the plurality of second boards And can be bent relative to the main board, the number of at least one feeding part located on the main board is one, the gate position of the main board is located at the geometric center of the main board, and is located at least one feeding part of each sub-board The number is one, and the position of the feeding portion of each sub-board is between the geometric center of the sub-board and the second board in the connection direction. The expansion board of the packaging box as described in claim 1, wherein the plurality of first boards include a main board and a plurality of first sub-boards, and the plurality of first sub-boards are connected to the periphery of the main board through the plurality of second boards and It can swing and bend relative to the main board; wherein, one of the two adjacent first sub-boards in the circumferential direction of the main board is provided with at least one first connecting portion, and the other is extended with at least one bendable A wing plate, at least one second connecting portion is provided on the at least one wing plate, one of the at least one first connecting portion and the at least one second connecting portion is a boss, and the other is a hole, when bent When the at least one wing plate faces the first sub-plate, the at least one first connection portion and the at least one second connection portion can be fitted and connected to each other. The unfolding plate of the packaging box as described in claim 3, wherein the at least one first connecting portion and the at least one second connecting portion are protruding posts, and a resisting portion is further protruded laterally, and the resisting portion is used for The hole walls of the at least one first connection portion and the at least one second connection portion which are hole portions abut against each other in the vertical fitting direction. The expansion board of the packaging box as described in claim 3, wherein the plurality of first boards further includes a plurality of second sub-boards, and the second sub-boards are relatively bendable and connected to the first boards through the second boards. The sub-board is provided with at least one third connecting portion on the second sub-board, the at least one first connecting portion is a boss, the at least one second connecting portion is a through hole, and the at least one third connecting portion is is a hole; wherein, when the at least one wing plate is connected to the first sub-plate, the at least one first connecting portion protrudes from the at least one wing plate, and then the second sub-plate connected to the first sub-plate The protruding at least one first connecting portion can be bent to further embed the at least one third connecting portion, so that the first sub-board and the second sub-board clamp the at least one wing board together. The unfolding plate of the packaging box as described in claim 5 further includes at least one retaining rib, and the at least one retaining rib is protruded from at least one of the second sub-panel and the main body connected to the at least one wing plate, when When the first sub-board and the second sub-board clamp the at least one wing board together, the second sub-board is sandwiched between the at least one retaining rib and the first sub-board. The expansion plate of the packaging box as described in claim 4, wherein the number of at least one feeding part located on the main board is one, and the gate position of the main board is located at the geometric center of the main board; The quantity of at least one feeding part is one, and the position of the feeding part of each of the first sub-boards is between the geometric center of the first sub-board and the second board in the connection direction; The position of the feeding portion of the sub-plate is between the geometric center of the second sub-plate and the second plate in the connection direction; the at least one first connecting portion is provided with a resisting portion on the lateral side, and the The pressing part is used to abut against the hole wall of the at least one second connecting part in the vertical fitting direction; the plastic material is polybutylene succinate (PBS); the outline of the main board is rectangular, The number of the plurality of first sub-boards is four and each is rectangular, the number of the plurality of second sub-boards is two and each is rectangular, the number of the at least one wing board is four, and the two second sub-boards are arranged in the same direction The two opposite first sub-plates, the four wing plates are arranged in pairs at the opposite ends of the two first sub-plates that are not provided with the second sub-plate; the number of the at least one retaining rib is plural, plural The retaining ribs include four first retaining ribs and two second retaining ribs, the four first retaining ribs are respectively arranged on the two sides of the two first sub-plates connected with the two wing plates, and the two second retaining ribs are The first sub-board without two wing plates is located on the opposite side edges of the main board, and is interposed between the second rib and the second sub-board; the length of each second rib is greater than The length of each of the first retaining ribs; in the extending direction, the size of the second sub-board is smaller than the size of the first sub-board. A mold, which is used to manufacture the unfolded panel of the packaging box according to any one of claims 1 to 7, the mold includes: A first module defines a surface, including a plurality of blocks and a plurality of partition ribs, the plurality of blocks are recessed on the face, each of the partition ribs extends along a length direction, and each of the partition ribs is connected in a connection direction Convex between the bottom surfaces of the two blocks, the top of each of the partition ribs is lower than the surface, and the connection direction is transverse to the length direction; and a second module, used to lean against the face and cover the plurality of blocks; Wherein, each block is provided with at least one gate, and in the connection direction, the at least one gate of at least one of the two blocks located on opposite sides of a partition rib is closer to the partition rib. The mold as described in claim 8, wherein the multiple blocks include a main block and multiple sub-blocks, the number of the at least one gate located in the main block is one, and the gate position of the main block is Located at the geometric center of the main block, the number of the at least one gate located in the sub-block is one, and the position of the gate of each sub-block is between the geometric center of the sub-block in the connection direction and between the dividing ribs. A method for manufacturing an unfolded panel of a packaging box, used to manufacture the expanded panel of a packaging box as described in any one of claims 1 to 7, the manufacturing method comprising the following steps: Provide a mold as described in Claim 8 or 9; providing a plastic in a molten state; performing an injection molding step, so that the plastic in the molten state enters and fills the plurality of blocks from at least one gate of each block; Carrying out a cooling forming step; performing a drafting step; Get a finished product.

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