Preformed pulp board for pulp molding

Abstract

A preformed pulp board (10) for pulp molding, the preformed pulp board (10) comprising a pulp board body (1), wherein a plurality of main separation line segments (3) spaced apart from each other are formed on the pulp board body, the part of the pulp board body surrounded by the plurality of main separation line segments spaced apart from each other forms a primary blank board (2), the main separation line segments allow the primary blank board and the pulp board body to be in a separated state, the pulp board body between any two main separation line segments spaced apart from each other extends outwards from the primary blank board, and a plurality of auxiliary separation line segments (4) are formed on the surface of the pulp board body to form elastic compensation structures (5), a first end (501) of each elastic compensation structure being connected to the primary blank board, and a second end (502) thereof being connected to the pulp board body. When the primary blank board is subjected to compression molding, the elastic compensation structures around the primary blank board are pulled, such that the main separation line segments are separated, and the elastic compensation structures deform and extend.

Description

Pre-pulp boards for pulp molding Technical Field

[0001] The invention relates to the technical field of pre-pulped boards, in particular to a pre-pulped board for pulp molding. Background Art

[0002] The pulp molding process is divided into wet pressing and dry pressing. The dry pressing process is to directly unwind or loosen the roll-shaped or flat-plate pulp sheet without crushing and beating, and without adding water medium. According to product needs, latex resin or appropriate additives are sprayed during the transportation process, and then the pulp sheet coated with additives is sent to the hot press for hot pressing and drying. The pulp sheet after hot pressing and drying is then cut off by a trimming machine to finally obtain the finished paper mold product.

[0003] The pulp board coated with additives is hot pressed and dried in the hot pressing mold of the hot pressing machine. In order to improve production efficiency, the hot pressing mold is usually designed as a one-mold multi-cavity structure, and then hot pressed and dried in the following two ways.

[0004] 1. First, the pulp sheet is cut into multiple blanks for forming the product according to the shape of the paper mold product. The number of blanks is the same as the number of mold cavities. Then, multiple blanks are simultaneously transferred to the hot pressing lower mold. Each blank corresponds to the position of the corresponding mold cavity. Then, all the blanks are hot-pressed and dried at once by the hot pressing mold to form a forming paper mold. Usually, the pulp sheet is in a roll shape. The blanks cut from the unrolled pulp sheet have serious warping. The warped blanks are difficult to align with the mold cavity, which easily leads to incomplete forming of the forming paper mold.

[0005] 2. The whole pulp board is directly sent to the hot pressing mold for hot pressing, drying and molding. During the molding process, multiple molding parts of the pulp board are simultaneously compressed and deformed. Each molding part pulls the pulp board separately, and the whole pulp board is prone to horizontal movement, resulting in a high defective rate of the final molded paper mold.

[0006] Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a preformed pulp board for pulp molding, which will not cause movement in the horizontal direction when being molded in a pressing mold.

[0008] In order to solve the above technical problems, the present invention provides a prefabricated pulp board for pulp molding, which includes: a pulp board body, a plurality of spaced main separation line segments are formed on the plane of the pulp board body, the parts of the pulp board body enclosed inward by the plurality of spaced main separation line segments form a preliminary blank, the main separation line segments make the adjacent positions of the preliminary blank and the pulp board body form a separated state, the pulp board body between the two spaced main separation line segments extends outward from the preliminary blank to form a plurality of secondary separation line segments on the surface of the pulp board body to form an elastic compensation structure, the first end of the elastic compensation structure is connected to the preliminary blank, and the second end is connected to the pulp board body, so that the preliminary blank still remains on the pulp board body, and when the preliminary blank is molded, the elastic compensation structure around it is pulled, the main separation line segments are separated, and the elastic compensation structure is deformed and elongated.

[0009] Furthermore, the pulp board body is provided with a plurality of green sheets, and each green sheet is connected to the pulp board body via an elastic compensation structure.

[0010] Furthermore, the elastic compensation structure is a continuous planar structure, which is a linear plate that forms multiple meanders in the continuous plane.

[0011] Furthermore, the elastic compensation structure includes a first elastic compensation element, which includes an odd number of at least three strip plates arranged linearly and side by side at intervals and cut by secondary separation segments. The first strip plate and the second strip plate are arranged on both sides of the central strip plate with the central strip plate located in the central position as a reference. One end of the first strip plate is connected to the pre-blank plate, and the other end of the first strip plate is connected to one end of the central strip plate through the first connecting plate. One end of the second strip plate is connected to the pulp plate body, and the other end of the second strip plate is connected to the other end of the central strip plate through the second connecting plate. The first strip plate, the first connecting plate, the central strip plate, the second connecting plate and the second strip plate are combined into the first elastic compensation element.

[0012] Furthermore, the elastic compensation structure includes at least one pair of first elastic compensation elements, which are arranged on the left and right sides of the pre-blank plate, wherein one first elastic compensation element is arranged on the right side of the pre-blank plate, and one end of the first elastic compensation element vertically extends from the pre-blank plate to the aforementioned first strip plate, and the end of the first strip plate is connected to the aforementioned first connecting plate in a right-bend direction, and the first connecting plate is further extended to the aforementioned central strip plate arranged parallel to the aforementioned first strip plate, and the central strip plate is further extended to the aforementioned second connecting plate in a right-bend direction, and the second connecting plate is further extended to the aforementioned central strip plate. The aforementioned second strip plate is arranged parallel to the plate, and the end of the second strip plate is connected to the aforementioned pulp plate body, and another first elastic compensation element is arranged on the left side of the preliminary plate. The first elastic compensation element on the left and the extension direction of the aforementioned first elastic compensation element on the right are opposite, that is, one end of the first elastic compensation element extends vertically from the preliminary plate to the aforementioned first strip plate, and the end of the first strip plate is then continuously connected to the aforementioned first connecting plate, the central strip plate, the second connecting plate, and the second strip plate in a left-bend direction, and the end of the second strip plate is connected to the aforementioned pulp plate body.

[0013] Furthermore, the elastic compensation structure is a second elastic compensation element, which is composed of a pair of adjacent and symmetrically positioned first elastic compensation elements. A central separation longitudinal line is set between the two adjacent and symmetrically positioned first elastic compensation elements.

[0014] During the molding process, the elastic compensation structure around the green sheet will be pulled, so that the elastic compensation structure can play a role of deformation and elongation. The elastic compensation structure is used to compensate for the relative displacement between the green sheet and the pulp board body. When the prefabricated pulp board for pulp molding of the present invention is molded in the mold, it will not cause movement in the horizontal direction. Therefore, each green sheet can be completely molded in the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a perspective view of a pre-pulp board for pulp molding according to the present invention.

[0016] FIG2 is a top view of FIG1 .

[0017] FIG3 is a top view of the elastic compensation structure.

[0018] FIG4 is a comparison diagram of the first elastic compensation element before and after deformation.

[0019] FIG5 is a three-dimensional view of the first elastic compensation element after deformation and elongation.

[0020] FIG6 is a partial enlarged view of FIG2 .

[0021] FIG. 7 is a perspective view of another pre-pulped plate.

[0022] FIG8 is a top view of FIG7 .

[0023] FIG9 is a schematic diagram of the prefabricated pulp board of FIG1 after being formed.

[0024] Explanation of the accompanying drawings: 10 prefabricated pulp board; 1 pulp board body; 2 initial blank board; 3 main separation line segment; 30 vacant space; 4 secondary separation line segment; 5 elastic compensation structure; 501 first end; 502 second end; 51 first elastic compensation element; 511 central strip plate; 512 first strip plate; 513 first connecting plate; 514 second strip plate; 515 second connecting plate; 6 second elastic compensation element; 61 central separation longitudinal line; A deformation elongation.

[0025] DETAILED DESCRIPTION

[0026] Please refer to Figures 1-7. The prefabricated pulp board 10 for pulp molding in this embodiment includes a pulp board body 1. A plurality of spaced main separation line segments 3 are formed on the plane of the pulp board body 1. The portion of the pulp board body 1 enclosed by the plurality of spaced main separation line segments 3 inwardly forms a pre-blank plate 2. The function of the main separation line segments 3 is to separate the adjacent positions of the pre-blank plate 2 and the pulp board body 1. The pulp board body 1 in this embodiment has a plurality of pre-blank plates 2, which can improve production efficiency. The pulp board body 1 between any two spaced main separation line segments 3 extends outward from the pre-blank plate 2 to form a plurality of secondary plates on the surface of the pulp board body 1. The separation line segment 4 is used to form an elastic compensation structure 5. The first end 501 of the elastic compensation structure 5 is connected to the green plate 2, and the second end 502 is connected to the pulp board body 1, so that the green plate 2 remains on the pulp board body 1. During the molding process, the green plate 2 will pull the elastic compensation structure 5 around it, so that the elastic compensation structure 5 can play a deformable and elongated role. The elastic compensation structure 5 elastically compensates the relative displacement between the green plate 2 and the pulp board body 1. When the prefabricated pulp board 10 for pulp molding of the present invention is molded in the mold, it will not cause movement in the horizontal direction. Therefore, each green plate 2 can be completely molded in the mold.

[0027] The prefabricated pulp board 10 can be integrally formed by a pulp molding process. The prefabricated pulp board 10 is a planar structure and is formed by punching a whole pulp board body 1 through a die-cutting machine, or by laser cutting a whole pulp board body 1 .

[0028] Please refer to Figure 1. The main separation line segment 3 allows the pre-blank plate 2 to be separable from the pulp board body 1. The width of the main separation line segment 3 can be increased to form a larger separation space 30, so that the pre-blank plate 2 can remain flat and not warped under the elastic action of the elastic compensation structure 5 around it before molding. In addition, the increased width of the vacant space 30 by the main separation line segment 3 allows relative displacement between the pre-blank plate 2 and the pulp board body 1 during the molding process, and the prefabricated pulp board 10 will not cause movement in the horizontal direction.

[0029] Please refer to the schematic diagram of the elastic compensation structure 5 shown in Figures 1-3, which is an elastic compensation structure 5 formed by the pulp board body 1 between any two spaced main separation segments 3 extending outward from the blank plate 2 to form multiple secondary separation segments 4 on the surface of the pulp board body 1. The elastic compensation structure 5 is a continuous plane structure, which is a linear plate that forms multiple windings in a continuous plane. In one embodiment, the elastic compensation structure 5 includes a first elastic compensation element 51, and the first elastic compensation element 51 includes an odd number of and at least three strip plates that are linearly arranged side by side at intervals and are completed by cutting through the secondary separation segments 4. Three strip plates that are linearly arranged side by side at intervals are used for illustration, wherein the central strip plate 511 located in the central position is used as a reference, and the first strip plate 512 and the second strip plate 514 are arranged on both sides of the central strip plate 511. One end of the first strip plate 512 is connected to the blank plate 2. In this embodiment, the first strip plate One end of the plate 512 is the first end 501, and the other end of the first strip plate 512 is connected to one end of the central strip plate 511 by the first connecting plate 513, and one end of the second strip plate 514 is connected to the pulp board body 1. In this embodiment, one end of the second strip plate 514 is the second end 502, and the other end of the second strip plate 514 is connected to the other end of the central strip plate 511 by the second connecting plate 515, that is, the first strip plate 512, the first connecting plate 513, the central strip plate 511, the second connecting plate 515 and the second strip plate 514 are combined into a first elastic compensation element 51. The first elastic compensation element 51 is in the shape of a tortuous linear plate. The first elastic compensation element 51 in this shape has good stiffness. Before the prefabricated pulp board 10 is molded, the green plate 2 can remain flat and not warped under the elastic action of the first elastic compensation elements 51 around it.

[0030] The first end 501 of the elastic compensation structure 5 is connected to the preformed plate 2, and the second end 502 is connected to the pulp board body 1. In one embodiment, the elastic compensation structure 5 includes at least one pair of first elastic compensation elements 51 that are diagonally arranged opposite to each other and extend in opposite directions. In this embodiment, two pairs of first elastic compensation elements 51 are connected between the pulp board body 1 and the preformed plate 2. It is best that the two pairs of first elastic compensation elements 51 are located at two symmetrical edges of the preformed plate 2 and connected to the pulp board body 1, so that the prefabricated pulp board 10 can achieve a more stable pulling state when being formed in the die, so that each preformed plate 2 can be completely formed in the die.

[0031] 4-5 , in the initial state, the first elastic compensation element 51 is a planar structure, and after deformation and elongation, it becomes a Z-shaped three-dimensional structure, and the deformation and elongation amount is A.

[0032] Please refer to Figures 2-3 and 6 at the same time. According to Figure 6, in the embodiment, the elastic compensation structure 5 includes a plurality of first elastic compensation elements 51. When a first elastic compensation element 51 of the elastic compensation structure 5 is arranged on the right side of the pre-blank 2, the first end 501 of the elastic compensation structure 5, that is, one end of the first elastic compensation element 51, extends vertically from the pre-blank 2 to form the aforementioned first strip plate 512. The end of the first strip plate 512 then bends rightward to connect with the aforementioned first connecting plate 513. The first connecting plate 513 further extends to form the aforementioned central strip plate 511 arranged parallel to the aforementioned first strip plate 512. The central strip plate 511 further extends to form the aforementioned second connecting plate 515 in a rightward direction. The second connecting plate 515 further extends to form the aforementioned second strip plate 514 arranged parallel to the aforementioned central strip plate 511. , the end of the second strip plate 514 is connected to the aforementioned pulp board body 1, and when the other first elastic compensation element 51 of the elastic compensation structure 5 is arranged on the left side of the pre-blank plate 2, the elastic compensation structure 5 located on the left and the extension direction of the aforementioned elastic compensation structure 5 located on the right are opposite, that is, the first end 501 of the elastic compensation structure 5, that is, one end of the other first elastic compensation element 51 vertically extends from the pre-blank plate 2 to the aforementioned first strip plate 512, and the end of the first strip plate 512 is then continuously connected to the aforementioned first connecting plate 513, the central strip plate 511, the second connecting plate 515, and the second strip plate 514 in a left-bend direction, and the end of the second strip plate 514 is connected to the aforementioned pulp board body 1. The elastic compensation structures 5 extending to the left and the right have better tolerance when being pulled, and the deformation and elongation effect is more stable.

[0033] Please refer to another embodiment shown in Figures 7-8. The pulp board body 1 is formed by extending the blank plate 2 outward to form multiple secondary separation line segments 4 on the surface of the pulp board body 1 to form an elastic compensation structure 5. The elastic compensation structure 5 is a second elastic compensation element 6. The second elastic compensation element 6 is composed of a pair of adjacently arranged and symmetrically positioned first elastic compensation elements 51. A central separation longitudinal line 61 is provided between the two adjacently arranged and symmetrically positioned first elastic compensation elements 51. Before the blank plate 2 of the prefabricated pulp board 10 is molded, it can remain flat and not warped under the elastic action of the second elastic compensation elements 6 around it.

[0034] Please refer to Figure 9. During the molding process, the green sheet 2 of the prefabricated pulp board 10 will pull the elastic compensation structure 5 around it. The elastic compensation structure 5 will deform and stretch under the pulling action. The elastic compensation of the elastic compensation structure 5 will compensate for the relative displacement between the green sheet 2 and the pulp board body 1. The prefabricated pulp board 10 will not cause horizontal movement. Therefore, the green sheet 2 can be completely molded in the mold. The prefabricated pulp board 10 for pulp molding of the present invention will not cause horizontal movement when being molded in the mold.

[0035] In summary, the present invention provides a prefabricated pulp board 10 for pulp molding, wherein a plurality of spaced main separation line segments 3 are formed on the plane of the pulp board body 1, and the portion of the pulp board body 1 enclosed inward by the plurality of spaced main separation line segments 3 forms a preformed board 2. The function of the main separation line segments 3 is to separate the adjacent positions of the preformed board 2 and the pulp board body 1. The pulp board body 1 between any two spaced main separation line segments 3 extends outward from the preformed board 2 to form a surface of the pulp board body 1. A plurality of secondary separation line segments 4 are formed to form an elastic compensation structure 5, the first end 501 of the elastic compensation structure 5 is connected to the preformed plate 2, and the second end 502 is connected to the pulp board body 1, so that the preformed plate 2 remains on the pulp board body 1. During the molding process, the preformed plate 2 will pull the elastic compensation structure 5 around it, so that the elastic compensation structure 5 can play a role of deformation and elongation. When the prefabricated pulp board 10 for pulp molding of the present invention is molded in the mold, it will not cause movement in the horizontal direction.

Claims

1. A pre-made pulp board for pulp molding, characterized in that: The prefabricated pulp board includes a pulp board body, on the plane of the pulp board body, a plurality of spaced main separation line segments are formed, the part of the pulp board body enclosed inward by the plurality of spaced main separation line segments forms a preliminary blank, the main separation line segments separate the adjacent positions of the preliminary blank and the pulp board body, the pulp board body between the two spaced main separation line segments extends outward from the preliminary blank to form a plurality of secondary separation line segments on the surface of the pulp board body to form an elastic compensation structure, the first end of the elastic compensation structure is connected to the preliminary blank, and the second end is connected to the pulp board body, so that the preliminary blank remains on the pulp board body, when the preliminary blank is molded, the elastic compensation structure around it is pulled, the main separation line segments are separated, and the elastic compensation structure is deformed and elongated.

2. The pre-pulp board for pulp molding according to claim 1, characterized in that: The pulp board body is provided with a plurality of primary blanks, and each of the primary blanks is connected with the pulp board body through an elastic compensation structure.

3. The pre-pulp board for pulp molding according to claim 2, characterized in that: The elastic compensation structure is a continuous plane structure, which is a linear plate that forms multiple detours in the continuous plane.

4. The pre-pulp board for pulp molding according to claim 3, characterized in that: The elastic compensation structure includes a first elastic compensation element, which includes an odd number of at least three strip plates that are linearly arranged side by side and spaced apart by secondary separation line segments. The central strip plate located in the central position is used as a reference, and the first strip plate and the second strip plate are arranged on both sides of the central strip plate. One end of the first strip plate is connected to the preliminary blank plate, and the other end of the first strip plate is connected to one end of the central strip plate through a first connecting plate. One end of the second strip plate is connected to the pulp board body, and the other end of the second strip plate is connected to the other end of the central strip plate through a second connecting plate. The first strip plate, the first connecting plate, the central strip plate, the second connecting plate and the second strip plate are combined into the first elastic compensation element.

5. The pre-pulp board for pulp molding according to claim 4, characterized in that: The elastic compensation structure includes at least one pair of first elastic compensation elements, which are arranged on the left and right sides of the pre-blank plate, wherein one first elastic compensation element is arranged on the right side of the pre-blank plate, one end of the first elastic compensation element vertically extends from the pre-blank plate to the aforementioned first strip plate, the end of the first strip plate then connects to the aforementioned first connecting plate in a right-bend direction, the first connecting plate then extends to the aforementioned central strip plate arranged parallel to the aforementioned first strip plate, the central strip plate then extends to the aforementioned second connecting plate in a right-bend direction, and the second connecting plate then extends to the aforementioned central strip plate The aforementioned second strip plate is arranged in parallel, and the end of the second strip plate is connected to the aforementioned pulp board body, and another first elastic compensation element is arranged on the left side of the initial blank plate. The first elastic compensation element located on the left and the extension direction of the aforementioned first elastic compensation element located on the right are opposite, that is, one end of the first elastic compensation element vertically extends from the initial blank plate to the aforementioned first strip plate, and the end of the first strip plate is continuously connected to the aforementioned first connecting plate, the central strip plate, the second connecting plate, and the second strip plate in a left-bend direction, and the end of the second strip plate is connected to the aforementioned pulp board body.

6. The pre-pulp board for pulp molding according to claim 4, characterized in that: The elastic compensation structure is a second elastic compensation element, which is composed of a pair of adjacent and symmetrical first elastic compensation elements. A central separation longitudinal line is set between the two adjacent and symmetrical first elastic compensation elements.

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