TW202333998A - 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

Packaging box unfolding plate, mold and manufacturing method thereof

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

The main purpose of packaging boxes is to protect the internal goods, such as dustproof and anti-collision, so that the goods can be kept in a better condition during transportation and sales to consumers or users; among them, paper materials are easy to It has the advantages of processing, printability, recyclability, and can be folded at will, so the common packaging boxes in our daily life are all made of paper boxes.

There are also many shortcomings in using paper for packaging boxes, such as poor waterproofness and easy to be punctured by sharp objects. Currently, there are two ways to bend and assemble the unfolding plate into a box: 1. Set various incisions at preset positions of the unfolding plate. In order to facilitate the formation of other cardboards through plug-in connection. 2. Use other connecting components to connect the cardboards, such as glue, double-sided tape, staples, etc.

However, the first combination method is easy to destroy the original sealing of the packaging box, and it is easy for various cardboards to be interspersed and overlapped, causing the overall appearance to be uneven and the outer outline dimensions to be inconsistent as a whole. The second combination method requires additional connecting components, resulting in increased assembly costs.

Therefore, it is necessary to provide a novel and progressive expansion plate of the packaging box, its mold and its manufacturing method to solve the above problems.

The main purpose of the present invention is to provide an unfolding plate of a packaging box, a mold thereof, and a manufacturing method thereof. The finished unfolding plate produced by an injection mold has a first plate and a second plate with different thicknesses, so that the first plate can The boards can be relatively bent through the second board, without the need for folding processing as in traditional methods, so the overall processing steps can be effectively simplified. The formed packaging box can be waterproof, have better surface quality, and is not easily damaged. The advantages.

In order to achieve the above object, the present invention provides an unfolding panel of a packaging box, including: 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 plates is made of plastic material. The plates extend along a length direction, and each second plate is connected between two first plates in a connection direction that is transverse to the length direction. The thickness of each second plate is smaller than that of each of the first plates. The thickness of the first plate; wherein, the two first plates connected to the second plate respectively define a first side and a second side 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.

In order to achieve the above object, the present invention further provides a mold for manufacturing the unfolding plate of the packaging box as mentioned above. The mold includes: a first module and a second module. The first module defines a face. The first module includes a plurality of blocks and a plurality of separation ribs. The plurality of blocks are recessed on the face. Each of the separation ribs extends along a length direction. Each of the separation ribs is located on a The connection direction is protruding 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 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 the dividing rib is closer to the dividing rib.

In order to achieve the above object, the present invention also provides a method for manufacturing the unfolding plate of the packaging box, which is used to manufacture the unfolding plate of the packaging box as described above. The manufacturing method includes the following steps: providing a mold as described above; providing a mold. Molten plastic; perform an injection molding step, allowing the molten plastic to enter and fill the plurality of blocks through at least one gate of each block; perform a cooling molding step; perform a drafting step; obtain a finished product .

The following examples are only used to illustrate possible implementations of the present invention, but they 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 article do not limit the number. It can also be "plural" according to the requirements. This change in quantity is also the scope of the desired protection, which will be explained first.

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

The plurality of first plates 1 is made of plastic material and has many advantages such as dustproof, waterproof, wear-resistant, puncture-resistant, long shelf life, etc. The plurality of first plates 1 includes at least one gate 45 corresponding to At least one feeding part 11; among them, the plastic material is preferably polybutylene succinate (PBS), which is a biodegradable polymer material that can be decomposed and metabolized by natural microorganisms or enzymes, and finally decomposed into Carbon dioxide and water, in line with current environmental awareness. Similarly, the second plates 18 are made of plastic material, which is the same material as the first plates 1 . Each second plate 18 extends along a length direction 51 , and each second plate 18 is 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 second plate 18 has better bendability, allowing one first plate 1 to be bent relative to another first plate 1 .

It is worth mentioning that the two first plates 1 connected to the second plate 18 respectively define a first side 12 and a second side 13 spaced apart in the connection direction 52. The first side part 12 is connected to the second plate 18, and the at least one feeding part 11 of at least one of the two first plates 1 is closer to the first side part 12 and farther away from the second side part 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 fill the mold first, quickly and reliably into the second plate to be formed. 18 of space ensures that the formed second plate 18 has a continuous and uninterrupted structure and a uniform density, thereby enabling the two first plates 1 to 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 daughter boards. The plurality of daughter boards are arranged with the main board 14 as the center. The plurality of daughter boards can face each other through the plurality of second boards 18 . The main plate 14 is bent, and the number of at least one feed portion 11 located on the main plate 14 is one. The position of the gate 45 of the main plate 14 is located at the geometric center of the main plate 14, so as to facilitate the directionality of the molten plastic. uniform movement distribution, and the number of at least one feeding portion 11 located on each sub-board is one, and the position of the feeding portion 11 of each sub-board in the connection direction 52 is between the geometric center of the sub-board and between the second plates 18 .

More specifically, the plurality of sub-boards further includes a plurality of first sub-boards 15. The position of the feeding portion 11 of each first sub-board 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 first sub-boards 15 are connected to the peripheral side of the main board 14 through the second boards 18 and can swing and bend relative to the main board 14 to form side walls; where, 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 has at least one bendable wing plate 17 extending from the at least one wing plate. 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 protruding post and 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 part 21 and the at least one second connecting part 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 that is a convex column is further provided with a resisting portion 24 protruding laterally, and the resisting portion 24 is used to contact the at least one first connecting portion 21 . 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 to additionally increase the supporting force in different directions and effectively prevent disengagement. In this embodiment, the at least one first connecting portion 21 is provided with a resisting portion 24 protruding laterally. The resisting portion 24 is used to engage with the hole wall of the at least one second connecting portion 22 in a vertical fitting direction. against each other.

More specifically, the plurality of first plates 1 further includes a plurality of second daughter plates 16 , and the position of the feeding portion 11 of each second daughter plate 16 is between the second daughter plates 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 through the second plate 18 in a relatively bendable manner. In the extending direction, the second sub-plate 16 The size of the board 16 is smaller than the size of the first sub-board 15 so as to provide a margin space to accommodate the first sub-board 15 on the side. Moreover, the second sub-board 16 is provided with at least one third connecting part 23. The at least one first connecting part 21 is a protruding column, the at least one second connecting part 22 is a through hole, and the at least one third connecting part 23 is a through hole. The connecting part 23 is a hole part; when the at least one wing plate 17 is connected to the first sub-board 15, the at least one first connecting part 21 protrudes from the at least one wing plate 17 and is connected with the first sub-board. The second sub-board 16 connected to 15 can be bent toward the first sub-board 15 so that the protruding at least one first connecting portion 21 is further embedded in the at least one third connecting portion 23, and then the first sub-board 16 is connected to the second sub-board 16. The plate 15 and the second sub-plate 16 jointly sandwich the at least one wing plate 17. This structural configuration can not only prevent the at least one wing plate 17 from loosening, but also provide better continuity and better appearance of the inner and outer surfaces.

Preferably, the expansion board of the packaging box further includes at least one blocking rib, which is protruding from at least one of the second sub-panel 16 connected to the at least one wing panel 17 and the main body. When the third When a sub-panel 15 and the second sub-panel 16 sandwich the at least one wing panel 17 together, the second sub-panel 16 is sandwiched and limited between the at least one rib and the first sub-panel 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 boards 17 is four. Two second sub-boards 16 are arranged on two first sub-boards 15 opposite in the same direction. Four wing boards 17 are arranged in pairs on two of the two second sub-boards 16. Opposite ends of the first sub-board 15 . Moreover, the number of the at least one blocking ribs is a plurality. The plurality of blocking ribs include four first blocking ribs 31 and two second blocking ribs 32. The length of each second blocking rib 32 is longer than that of each first blocking rib 31. The length of four, the first baffle ribs 31 are respectively arranged on two sides of the two first sub-boards 15 connected with the two wing plates 17, and the two second baffle ribs 32 are respectively arranged on two opposite sides of the main plate 14. The first sub-panel 15 without the two wing panels 17 is located between the second rib 32 and the second sub-panel 16 .

Please further refer to another embodiment of Figure 9. The difference from this embodiment is that the packaging box is further welded by a plastic welding machine. Examples of the plastic welding machine include but are not limited to ultrasonic plastic welding machine and 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 embodiment of FIGS. 1 to 8 again. The present invention also provides a mold 4 for manufacturing the expansion plate of the packaging box as described above. The mold 4 includes: a first mold 41 and a second mold. Item 47.

The first module 41 defines a face 42. The first module 41 includes a plurality of blocks and a plurality of separation ribs 46. The plurality of blocks are recessed in the face 42, and each of the separation ribs 46 extends along the length direction 51. , each separation rib 46 is protruding between the bottom surfaces of the two blocks in the connection direction 52 , and the top of each separation rib 46 is lower than the surface 42 to reserve a space for forming each second plate 18 , the connection direction 52 is transverse to the length direction 51 . The second module 47 is used to abut the face 42 and cover the plurality of blocks; wherein, each block is provided with at least one gate 45 located on two opposite sides of the dividing rib 46 in the connection direction 52 . The at least one gate 45 of at least one of the two blocks on the side 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 is 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 intermediate in the connection direction 52. The advantages of using this structural arrangement between the geometric center of the sub-block 44 and the dividing rib 46 have been discussed above and will not be repeated here.

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

1: First board 11: Feeding department 12:First side 13:Second side 14: Motherboard 15: First sub-board 16: Second sub-board 17: Wing plate 18:Second board 21:First connection part 22: Second connection part 23:Third connection part 24: Ministry of Resistance 31:First rib 32:Second rib 4: Mold 41:First module 42:Facial 43: Main block 44: Sub-block 45:Gate 46:Separating ribs 47: Second module 51:Length direction 52:Connection direction 6: Welding part

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

1: First board

14: Motherboard

15: First sub-board

16: Second sub-board

17: Wing plate

18:Second board

21:First connection part

22: Second connection part

23:Third connection part

24: Ministry of Resistance

31:First rib

32:Second rib

Claims (10)

An unfolding board of a packaging box, including: The 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 plates are made of plastic material. Each second plate extends along a length direction. Each second plate is connected between two first plates in a connecting direction, and the connecting direction is transverse. In the length direction, the thickness of each second plate is smaller than the thickness of each first plate; Wherein, the two first plates connected to the second plate respectively define a first side part and a second side part at intervals in the connection direction, and the first side part is connected to 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 expansion 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 with the main board as the center, and the plurality of sub-boards pass through the plurality of second boards It can be bent relative to the main board, and the number of at least one feeding portion on the main board is one. The gate position of the main board is located at the geometric center of the main board and between at least one feeding portion 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 panel of the packaging box as claimed in claim 1, wherein the plurality of first panels includes a main board and a plurality of first sub-boards, and the plurality of first sub-boards are connected to the peripheral side 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 extends with at least one bendable first sub-board. 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 protruding post and the other is a hole. When bent, When the at least one wing panel faces the first sub-panel, the at least one first connecting portion and the at least one second connecting portion can be engaged and positioned with each other. The unfolding plate of the packaging box according to claim 3, wherein the at least one first connecting part and the at least one second connecting part which are in the form of protruding pillars are further provided with a resisting part protruding laterally, and the resisting part is The hole walls of the hole portion among the at least one first connecting portion and the at least one second connecting portion abut against each other in the vertical fitting direction. The unfolding panel of the packaging box as claimed in claim 3, wherein the plurality of first panels further includes a plurality of second sub-panels, and the second sub-panels are connected to the first in a relatively bendable manner through the second panels. The sub-board is provided with at least one third connection part on the second sub-board, the at least one first connection part is a protruding pillar, the at least one second connection part is a through hole, and the at least one third connection part is is a hole portion; wherein, when the at least one wing plate is connected to the first sub-board, the at least one first connecting portion protrudes from the at least one wing plate and is further connected to the second sub-board of the first sub-board. It can be bent so that the protruding at least one first connecting portion is further embedded in the at least one third connecting portion, so that the first sub-board and the second sub-board jointly sandwich the at least one wing board. The unfolding panel of the packaging box according to claim 5 further includes at least one baffle rib, which is protruding from at least one of the second sub-panel and the main body connected to the at least one wing panel. When the first sub-panel and the second sub-panel jointly sandwich the at least one wing panel, the second sub-panel is clamped and limited between the at least one blocking rib and the first sub-panel. The expansion board of the packaging box as described in claim 4, wherein the number of at least one feeding portion on the main board is one, the gate position of the main board is located at the geometric center of the main board; it is located between each of the first sub-boards. The number of at least one feeding part is one, and the position of the feeding part of each first sub-plate is between the geometric center of the first sub-plate and the second plate in the connection direction; each second The position of the feed portion of the sub-board is between the geometric center of the second sub-board and the second board in the connection direction; the at least one first connection portion is protruding with a resisting portion laterally, and the The resisting part is used to butt 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 motherboard 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-boards and the four wing boards are respectively arranged at the opposite ends of the two first sub-boards that are not provided with the second sub-board; the number of the at least one baffle rib is a plurality of plural ones. The baffle ribs include four first baffle ribs and two second baffle ribs. The four first baffle ribs are respectively arranged on two sides of the two first sub-plates connected to the two wing plates. The two second baffle ribs are The first sub-board without two wing panels is located at two opposite side edges of the main board and is between the second baffle rib and the second sub-board; the length of each second baffle rib is greater than The length of each first blocking rib; in the extending direction, the size of the second sub-board is smaller than the size of the first sub-board. A mold used to manufacture the unfolded plate of the packaging box according to any one of claims 1 to 7, the mold including: A first module defines a face, including a plurality of blocks and a plurality of separation ribs. The plurality of blocks are recessed on the face. Each of the separation ribs extends along a length direction, and each of the separation ribs is connected in a connection direction. Protruding between the bottom surfaces of two blocks, the top of each dividing rib is lower than the surface, and the connecting direction is transverse to the length direction; and a second module for abutting the face and covering the plurality of regions; 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 the separation rib is closer to the separation rib. The mold as described in claim 8, wherein the plural blocks include a main block and a plurality of 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 each gate of the sub-block is between the geometric center of the sub-block in the connection direction. and between the dividing ribs. A method for manufacturing the unfolding plate of the packaging box, used to manufacture the unfolding plate of the packaging box according to any one of claims 1 to 7, the manufacturing method includes the following steps: Providing a mold as described in claim 8 or 9; Provide a plastic in a molten state; Carry out an injection molding step so that the plastic in a molten state enters and fills the plurality of blocks through at least one gate of each block; Carry out a cooling forming step; Perform a drafting step; Get a finished product.

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