Prefabricated pulp board for paper pulp molding
By designing multiple spaced main separation line sections and elastic compensation structures on the pre-pulp plate for pulp molding, the problem of pre-pulp plate squirting during the hot pressing and drying process is solved, the effect of complete forming in the mold is achieved, and the quality of the finished product is improved.
Patent Information
- Application Number
- CN202311391393.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-25
- Publication Date
- 2025-05-02
AI Technical Summary
In the pulp molding process, the preformed pulp plate is prone to cause twitching in the horizontal direction during the hot pressing and drying process, resulting in a high defect rate of molded paper molds.
A pre-made pulp plate for pulp molding is designed, which forms multiple spaced main separation lines on the plane of the pulp plate body to form a blank plate, and connects the blank plate and the pulp plate body through an elastic compensation structure, so that the blank plate can pull the surrounding elastic compensation structure during molding, and uses the deformable and elongation effect of the elastic compensation structure to prevent twitching.
Through the action of the elastic compensation structure, the pre-made pulp plate no longer moves in the horizontal direction when forming in the press mold, ensuring that each initial plate can be fully formed in the press mold, and improving the quality and defective rate of the finished product.
Smart Images
Figure CN119913788A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of prefabricated pulp boards, in particular to a prefabricated pulp 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 unwind or loosen the roll-shaped or flat-plate pulp board 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 board coated with additives is sent to the hot press for hot pressing and drying. After hot pressing and drying, the pulp board is 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 a hot pressing mold of a hot press 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 products according to the shape of the paper mold product. The number of blanks is the same as the number of mold cavities. Then, the 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 may eventually lead 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 and drying. During the molding process, multiple molding parts of the pulp board are pressed and deformed at the same time. 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. Summary of the invention
[0006] The technical problem to be solved by the present invention is to provide a prefabricated pulp board for pulp molding, which will not cause movement in the horizontal direction when being molded in a pressing mold.
[0007] 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, 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 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, 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.
[0008] Furthermore, the pulp board body is provided with a plurality of preliminary blanks, and each preliminary blank is connected to the pulp board body via an elastic compensation structure.
[0009] Furthermore, the elastic compensation structure is a continuous plane structure, which is a linear plate that forms multiple windings in a continuous plane.
[0010] Furthermore, 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 a secondary separation line segment, and a first strip plate and a second strip plate are arranged on both sides of the central strip plate with a central strip plate located in the central position as a reference, 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 by 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 by a second connecting plate, and the first strip plate, the first connecting plate, the central strip plate, the second connecting plate and the second strip plate are combined into a first elastic compensation element.
[0011] Further, the elastic compensation structure includes at least one pair of first elastic compensation elements, the pair of first elastic compensation elements 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, the second connecting plate then extends to the aforementioned central strip plate The second strip plate is arranged parallel to the pre-blank 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 pre-blank plate. The first elastic compensation element on the left side and the extension direction of the first elastic compensation element on the right side are opposite, that is, 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 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.
[0012] 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, and a central separation longitudinal line is set between the two adjacent and symmetrically positioned first elastic compensation elements.
[0013] During the molding process, the elastic compensation structure around the blank plate 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 blank plate 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 blank plate can be completely molded in the mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a perspective view of a pre-pulp board for pulp molding according to the present invention.
[0015] Figure 2 for Figure 1 Top view of the .
[0016] Figure 3 It is a top view of the elastic compensation structure.
[0017] Figure 4 This is a comparison diagram of the first elastic compensation element before and after deformation.
[0018] Figure 5 This is a three-dimensional diagram of the first elastic compensation element after deformation and elongation.
[0019] Figure 6 for Figure 2 A partial enlarged view of .
[0020] Figure 7 It is a three-dimensional picture of another prefabricated pulp board.
[0021] Figure 8 for Figure 7 Top view of the .
[0022] Fig. 9 for Figure 1 Schematic diagram of the prefabricated pulp board after forming.
[0023] 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. DETAILED DESCRIPTION
[0024] See also Figure 1-7 As shown, the prefabricated pulp board 10 for pulp molding in this embodiment includes a pulp board body 1, and 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 inward by the plurality of spaced main separation line segments 3 forms a primary blank 2. The function of the main separation line segments 3 is to separate the primary blank 2 and the adjacent position of the pulp board body 1. The pulp board body 1 in this embodiment has a plurality of primary blanks 2, which can improve production efficiency. The pulp board body 1 between any two spaced main separation line segments 3 extends outward from the primary blank 2 to form a plurality of secondary separation lines on the surface of the pulp board body 1. 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 initial blank 2, and the second end 502 is connected to the pulp board body 1, so that the initial blank 2 still remains on the pulp board body 1. During the molding process, the initial blank 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 is used to compensate for the relative displacement between the initial blank 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 initial blank 2 can be completely molded in the mold.
[0025] 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 by a die-cutting machine, or by laser cutting.
[0026] See also Figure 1As shown, the main separation line segment 3 allows the preliminary blank 2 to be separable from the pulp board body 1, and the width of the main separation line segment 3 can be increased to form a vacant space 30 of a larger separation space, so that the preliminary blank 2 can remain flat and not warped under the elastic action of the elastic compensation structure 5 around it before compression molding, and the vacant space 30 with a larger width increased by the main separation line segment 3 allows a relative displacement to occur between the preliminary blank 2 and the pulp board body 1 during the compression molding process, and the prefabricated pulp board 10 will not cause movement in the horizontal direction.
[0027] See also Figure 1-3 The schematic diagram of the elastic compensation structure 5 shown is an elastic compensation structure 5 formed by extending the pulp board body 1 between any two spaced main separation line segments 3 from the initial blank 2 to form multiple secondary separation line 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 detours 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 and spaced apart from each other and are completed by cutting the secondary separation line segments 4. Three strip plates that are linearly arranged side by side and spaced apart from each other are used for illustration, wherein a central strip plate 511 located in the central position is used as a reference, and a first strip plate 512 and a 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 initial blank 2. In this embodiment, the first strip plate 51 2 is the first end 501, 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, and 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 preformed pulp board 10 is molded, the initial blank 2 can remain flat and not warped under the elastic action of the first elastic compensation elements 51 around it.
[0028] The first end 501 of the elastic compensation structure 5 is connected to the blank 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 blank plate 2. It is best that the two pairs of first elastic compensation elements 51 are located at two symmetrical edges of the blank 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 blank plate 2 can be completely formed in the die.
[0029] See also Figure 4-5 As shown, in the initial state, the first elastic compensation element 51 is a planar structure, and after deformation and elongation, it is a "Z"-shaped three-dimensional structure, and the deformation and elongation amount is A.
[0030] Please also see Figure 2-3 and Figure 6 As shown, according to Figure 6 As an illustration, 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 plate 2, the first end 501 of the elastic compensation structure 5, that is, one end of a first elastic compensation element 51, vertically extends from the pre-blank plate 2 to the aforementioned first strip plate 512. The end of the first strip plate 512 is connected to the aforementioned first connecting plate 513 in a right-bend direction. The first connecting plate 513 is further extended to the aforementioned central strip plate 511 arranged parallel to the aforementioned first strip plate 512. The central strip plate 511 is further extended to the aforementioned second connecting plate 515 in a right-bend direction. The second connecting plate 515 is further extended to the aforementioned second strip plate 514 arranged parallel to the aforementioned central strip plate 511. The second strip plate 51 4 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 initial blank plate 2, the elastic compensation structure 5 located on the left side and the extension direction of the aforementioned elastic compensation structure 5 located on the right side are opposite to each other, 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 initial blank plate 2 to the aforementioned first strip plate 512, and the end of the first strip plate 512 is 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 left and right have better tolerance when being pulled, and the deformation and elongation effect is more stable.
[0031] See also Figure 7-8In another embodiment shown, the pulp board body 1 is formed by extending outward from the initial blank 2 to form a plurality of secondary separation line segments 4 on the surface of the pulp board body 1 to form an elastic compensation structure 5, and the elastic compensation structure 5 is a second elastic compensation element 6, and the second elastic compensation element 6 is composed of a pair of adjacently arranged and symmetrically positioned first elastic compensation elements 51, and a central separation longitudinal line 61 is provided between the two adjacently arranged and symmetrically positioned first elastic compensation elements 51. Before compression molding, the initial blank 2 of the prefabricated pulp board 10 can remain flat and not warped under the elastic action of the second elastic compensation elements 6 around it.
[0032] See also Fig. 9 As shown, during the molding process, the initial blank 2 of the prefabricated pulp board 10 will pull the elastic compensation structure 5 around it, and 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 initial blank 2 and the pulp board body 1, and the prefabricated pulp board 10 will not cause horizontal movement. Therefore, the initial blank 2 can be completely molded in the mold. When the prefabricated pulp board 10 for pulp molding of the present invention is molded in the mold, it will not cause horizontal movement.
[0033] 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 preliminary blank 2, and the main separation line segments 3 are used to separate the adjacent positions of the preliminary blank 2 and the pulp board body 1, and the pulp board body 1 between any two spaced main separation line segments 3 extends outward from the preliminary blank 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, a first end 501 of the elastic compensation structure 5 is connected to the initial blank 2, and a second end 502 is connected to the pulp board body 1, so that the initial blank 2 remains on the pulp board body 1. During the molding process, the initial blank 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.