Paper pulp molded product transfer mold, closed mold, molded product and preparation system

Abstract

The utility model provides a paper pulp molded product transfer mold, a closed mold, a molded product and a preparation system.The paper pulp molded product transfer mold comprises a body, a containing cavity used for containing a paper pulp molded product is formed in the body, and the upper surface of the body is provided with a bearing part used for bearing the two side edges of the paper pulp molded product; the two bearing parts are arranged on the two sides of the containing cavity, and a pre-pressing protrusion is arranged on each bearing part in a protruding mode. According to the paper pulp molded product transfer mold, the closing mold, the molded product and the preparation system, the pre-pressing protrusions are arranged on the bearing parts of the paper pulp molded product transfer mold in the protruding mode so that the lower surfaces of the side edges of the paper pulp molded product can be pre-pressed, and the pits profiling the pre-pressing protrusions can be formed in the lower surfaces of the side edges of the paper pulp molded product; by means of the pre-pressing device, abrasion of the paper pulp molded product transfer mold is reduced, it is guaranteed that during follow-up hot-pressing demolding, the side edge of a product is easier to fold through pre-pressing, and abrasion to a hot-pressing mold can be greatly reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pulp molding, and in particular to a pulp molding product transfer mold, mold closing, molded product, and preparation system. Background Art

[0002] When pulp molded products replace traditional plastic packaging materials, they represent a significant advancement in environmental sustainability. Because dry-pressed pulp molded products have large margins and poor flatness at the edges, trimming and flanging are often used to reduce these widths. However, trimming is more expensive, so flanging has become more widely used.

[0003] The dry-pressed paper mold production process follows the following steps: slurry absorption, demolding, drying and rehydration, and hot-pressing demolding. The flange structure is formed during the hot-pressing demolding stage. However, after rehydration, the moisture content of the paper mold is approximately 15%, making it relatively hard. The flange forming process causes significant wear and tear on the hot-pressing mold. Furthermore, the flange structure formed by the flanging process has a certain width, making flanging paper mold less competitive in logistics and palletizing. For example, a 16-inch laptop with a 5mm-wide flange structure would reduce the stacking capacity per layer from 30 to 26 units, increasing transportation costs by 15%. Therefore, if the flange width is reduced to below 5mm, the corresponding width of the hot-pressing mold must also be reduced. This results in greater local stress, further exacerbating wear and tear on the hot-pressing mold, reducing its service life by at least 20%. Utility Model Content

[0004] The present disclosure provides a pulp molded product transfer mold, a mold closing mold, a molded product and a preparation system to at least solve the above technical problems existing in the prior art.

[0005] According to the first aspect of the present disclosure, a pulp molded product transfer mold is provided, comprising a main body, wherein a receiving cavity for receiving a pulp molded product is provided on the main body, and the upper surface of the main body has a bearing portion for supporting two side edges of the pulp molded product, the two bearing portions are arranged on both sides of the receiving cavity, and each bearing portion is protruded with a pre-pressing protrusion.

[0006] In one embodiment, the pre-pressing protrusion is in an arc shape.

[0007] In one embodiment, the two supporting portions are symmetrically arranged relative to the accommodating cavity.

[0008] In one embodiment, the two pre-pressing protrusions are symmetrically arranged relative to the accommodating cavity.

[0009] According to a second aspect of the present disclosure, a pulp molded product mold is provided, comprising a pulp suction mold and a pulp molded product transfer mold as described in any one of the above embodiments, wherein the pulp suction mold is fitted into the shape of the body.

[0010] In one embodiment, when the slurry suction mold is engaged with the pulp molded product transfer mold, a manufacturing gap is formed between the slurry suction mold and the pulp molded product transfer mold.

[0011] According to a third aspect of the present disclosure, there is provided a molded product formed by combining the pulp molded product described in the above-mentioned embodiment, the molded product comprising a main body portion fitted with the accommodating cavity and a side portion fitted with the bearing portion, the side portion having a groove on its lower surface.

[0012] In one embodiment, the groove divides the side portion into a flat section connected to the main body portion and a folded section away from the main body portion.

[0013] In one embodiment, the length of the flattened section is configured to be adapted to the distance between the pre-pressing protrusion and the accommodating cavity.

[0014] According to a fourth aspect of the present disclosure, a preparation system is provided, comprising a hot pressing mold assembly comprising a first mold and a second mold, and further comprising a pulp molded product assembly as described in the above embodiment.

[0015] In the present disclosure, since the moisture content of the pulp molded product is about 70% and the texture is soft when the pulp molded product is demolded and transferred before hot pressing and after the pulp suction process, a pre-pressing protrusion is provided on each bearing part of the pulp molded product transfer mold to pre-press the lower surface of the side of the pulp molded product, so that the lower surface of the side of the pulp molded product can form a depression that imitates the pre-pressing protrusion. This not only reduces the wear of the pulp molded product transfer mold, but also ensures that the side of the product is easier to fold during subsequent hot pressing demolding through the pre-pressing process, and the wear of the hot pressing mold will be greatly reduced.

[0016] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example and not limitation, wherein:

[0018] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0019] Figure 1 A cross-sectional view showing the overall structure of a pulp molded product transfer mold according to an exemplary embodiment of the present disclosure is shown;

[0020] Figure 2 A cross-sectional view of the overall structure of a pulp molded product formed after slurry is absorbed from a pulp molded product transfer mold according to an exemplary embodiment of the present disclosure is shown;

[0021] Figure 3 A cross-sectional view showing the overall structure of a pulp molded product mold according to an exemplary embodiment of the present disclosure is shown;

[0022] Figure 4 Shown by Figure 3 A sectional view of the overall structure of a molded product formed by combining the pulp molded products;

[0023] Figure 5 A cross-sectional view showing a hot pressing mold closing of a manufacturing system according to an exemplary embodiment of the present disclosure;

[0024] Figure 6 A cross-sectional view showing the overall structure of a hot pressing mold clamping system according to an exemplary embodiment of the present disclosure is shown.

[0025] Explanation of the numbers in the figure: 1. Main body; 2. Pulp molded product; 3. Slurry suction mold; 4. Molded product; 5. Hot pressing mold clamping; 11. Accommodating cavity; 12. Bearing part; 13. Pre-pressing protrusion; 21. Side; 41. Main body; 42. Side; 43. Groove; 51. First mold; 52. Second mold; 421. Flat section; 422. Folding section; 511. Flanging part. DETAILED DESCRIPTION

[0026] To make the purposes, features, and advantages of the present disclosure more apparent and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative work shall fall within the scope of protection of the present disclosure.

[0027] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1 and Figure 2As shown, a pulp molded product transfer mold of an exemplary embodiment of the present invention includes a main body 1, a receiving cavity 11 for receiving a pulp molded product 2 is provided on the main body 1, and the upper surface of the main body 1 has a bearing portion 12 for supporting two side edges 21 of the pulp molded product 2, and the two bearing portions 12 are respectively arranged on both sides of the receiving cavity 11, and a pre-pressing protrusion 13 is protruded from each bearing portion 12.

[0029] In this embodiment, the supporting parts 12 are not limited to two, and their number can be adaptively designed according to the number of side edges 21 of the pulp molded product 2. For example, some pulp molded products 2 require a folding process on four sides. In this case, the number of supporting parts 12 is four, and the four supporting parts 12 are arranged around the accommodating cavity 11. The process flow of dry-pressed paper molding is sequentially slurry absorption, demolding, drying back, and hot-pressing demolding. Since the flange structure is formed during the hot-pressing demolding stage, and the pulp molded product 2 is demolded and transferred before hot-pressing demolding and after the slurry absorption process, the moisture content of the pulp molded product 2 is about 70%, and the texture is soft. Therefore, a pre-pressing protrusion 13 is protruded on each supporting portion 12 to pre-press the lower surface of the side 21 of the pulp molded product 2, so that the lower surface of the side 21 of the pulp molded product 2 forms a depression that imitates the pre-pressing protrusion 13. This process not only reduces the wear on the pulp mold transfer mold, which can even be negligible, but also ensures that the side 21 of the product is easier to fold during the subsequent hot-pressing demolding, which greatly reduces the wear on the hot-pressing mold. Among them, the contour shape of the pre-pressing protrusion 13 can include but is not limited to arc, square, diamond, triangle, or trapezoid, etc., as long as it can pre-press and reduce the thickness of the side 21. The distances from the pre-stressing protrusions 13 on each bearing portion 12 to the accommodating cavity 11 are equal or unequal, and the specific value of the distance between the pre-stressing protrusions 13 and the accommodating cavity 11 can be adaptively designed according to actual production needs. It is understandable that if one wants to reduce the width of the flanging structure, the width of the corresponding structure on the corresponding hot pressing mold also needs to be reduced. At this time, since the lower surface of the side 21 of the pulp molded product 2 has been pre-stressed to form a depression that imitates the pre-stressing protrusion 13, the force required to form the flanging structure when the hot pressing mold is used for flanging is smaller, and the loss to the hot pressing mold is also smaller. In order to ensure that the pulp molded product 2 can be smoothly adsorbed on the pulp molded product transfer mold, the main body 1 is usually provided with evenly distributed suction holes (not shown in the figure).

[0030] In one embodiment, the pre-pressing protrusion 13 is arc-shaped.

[0031] In this embodiment, the pre-pressing protrusion 13 is designed to be arc-shaped, so that the arc-shaped depression formed on the side 21 of the pulp molded product 2 after pre-pressing has stronger spatial adaptability and can be easily integrated into the hot pressing mold for folding in the subsequent process.

[0032] In one embodiment, the two supporting portions 12 are symmetrically arranged relative to the accommodating cavity 11 .

[0033] In one embodiment, the two pre-pressing protrusions 13 are symmetrically arranged relative to the accommodating cavity 11 .

[0034] In this embodiment, the main body 1 is preferably a symmetrical structure, so the two bearing parts 12 are symmetrically arranged relative to the accommodating cavity 11, and the two pre-stressing protrusions 13 are also symmetrically arranged relative to the accommodating cavity 11. By designing the symmetrical structure of the pulp molded product transfer mold, the mold can maintain balance when subjected to force, reducing deformation and errors caused by uneven force, ensuring the processing accuracy of the mold, and improving the stability of the mold. Due to the balanced force and reasonable layout, the degree of wear of the pulp molded product transfer mold will also be reduced accordingly, thereby extending its service life. It can be understood that the position of the pre-stressing protrusion 13 on the bearing part 12 can be adaptively designed according to actual production needs, and no further details will be given here.

[0035] Reference Figure 3 As shown, the present disclosure also provides a pulp molded product mold, including a pulp suction mold 3 and a pulp molded product transfer mold as in any one of the above embodiments, and the pulp suction mold 3 is fitted into the shape of the body 1.

[0036] In this embodiment, the slurry suction mold 3 is provided with slurry suction holes evenly distributed thereon. The slurry suction mold 3 vacuum-suctions slurry in the slurry suction pool, so that the pulp forms a wet paper blank, i.e., the pulp molded product 2, on the slurry suction mold 3. The slurry suction mold 3 is configured to be engageable with the pulp molded product transfer mold, so that the slurry suction mold 3 and the pulp molded product transfer mold cooperate to complete the demolding, transfer, and pre-pressing of the pulp molded product 2.

[0037] In one embodiment, when the slurry suction mold 3 is engaged with the pulp molded product transfer mold, a manufacturing gap is formed between the slurry suction mold 3 and the pulp molded product transfer mold.

[0038] In this embodiment, a manufacturing gap is formed between the slurry absorption mold 3 and the pulp molded product transfer mold to accommodate the pulp molded product 2 formed after slurry absorption.

[0039] Reference Figure 4 As shown, the present disclosure also provides a molded product 4 made by combining the pulp molded products in the above-mentioned embodiment, the molded product 4 includes a main body 41 fitted with the accommodating cavity 11 and a side portion 42 fitted with the bearing portion 12, and a groove 43 is provided on the lower surface of the side portion 42.

[0040] In this embodiment, the pulp molded product 2 is molded into a molded product 4 by pulp molded product combination. During the manufacturing process, the side 21 of the pulp molded product 2 is pre-pressed by the pre-pressing protrusion 13 to form a depression, which is the groove 43 on the lower surface of the side portion 42 of the molded product after manufacturing. This ensures that the side portion 42 of the molded product 4 is easier to fold during the subsequent hot pressing demolding, and the wear on the hot pressing mold will be greatly reduced.

[0041] In one embodiment, the groove 43 divides the side portion 42 into a flat section 421 connected to the main body 41 and a folded section 422 away from the main body 41 .

[0042] Specifically, in one embodiment, the length of the flattened section 421 is configured to be adapted to the distance between the pre-pressing protrusion 13 and the accommodating cavity 11 .

[0043] In this embodiment, after the subsequent side portion 42 is folded through the hot pressing mold, the position of the flat section 421 remains unchanged, and the folded section 422 will fold downward around the groove 43. Therefore, the lower surface of the side portion 42 of the molded product 4 formed by the pulp molded product has a groove 43, which ensures that when hot pressing and demolding are performed, the force required to form the flange structure is smaller, the folded section 422 is easier to fold downward, and the wear on the hot pressing mold will be greatly reduced.

[0044] Reference Figure 5 and Figure 6 As shown, the present disclosure further provides a preparation system, including a hot pressing mold clamp 5, the hot pressing mold clamp 5 includes a first mold 51 and a second mold 52, and also includes a pulp molded product clamp as in the above embodiment.

[0045] In this embodiment, the second mold 52 is positioned above the first mold 51. The first mold 51 is a concave mold, and the second mold 52 is a convex mold. A flange portion 511 is protruding from the first mold 51. After hot pressing by the hot pressing mold clamp 5, the length of the flat section 421 of the molded product 4 corresponds to the width of the flange portion 511 on the first mold 51. The folded section 422 of the molded product 4 is pressed downwardly and folded by the second mold 52. Because the pulp molded product clamp pre-presses the lower surface of the side 21 of the pulp molded product 2, a depression is formed on the lower surface of the side 21 of the pulp molded product 2 that is contoured to the pre-pressing protrusion 13. This makes it easier to fold the side 21 of the product during hot pressing and demolding using the hot pressing mold clamp 5, significantly reducing wear on the hot pressing mold clamp 5.

[0046] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the directional words is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that spatially relative terms include not only the orientation of the components as described in the figures, but also different orientations during use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0049] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0050] The present disclosure has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present disclosure to the described embodiments. In addition, it will be understood by those skilled in the art that the present disclosure is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present disclosure, all of which fall within the scope of protection claimed by the present disclosure. The scope of protection of the present disclosure is defined by the appended claims and their equivalents.

Claims

1. A pulp molded product transfer mold, characterized in that: The invention comprises a main body (1), wherein a receiving cavity (11) for receiving a pulp molded product (2) is provided on the main body (1), and a bearing portion (12) for bearing two side edges (21) of the pulp molded product (2) is provided on the upper surface of the main body (1), wherein the two bearing portions (12) are respectively arranged on both sides of the receiving cavity (11), and a pre-pressing protrusion (13) is protruded from each bearing portion (12).

2. The pulp molded product transfer mold according to claim 1, characterized in that: The shape of the pre-pressing protrusion (13) is arc-shaped.

3. The pulp molded product transfer mold according to claim 1, characterized in that: The two bearing portions (12) are symmetrically arranged relative to the accommodating cavity (11).

4. The pulp molded product transfer mold according to claim 1, characterized in that: The two pre-pressing protrusions (13) are symmetrically arranged relative to the accommodating cavity (11).

5. A mold for pulp molding products, comprising a pulp suction mold (3), characterized in that: It also includes a pulp molded product transfer mold as described in any one of claims 1 to 4, and the pulp absorption mold (3) is inlaid with the shape of the body (1).

6. The pulp molded product mold clamping method according to claim 5, characterized in that: When the slurry suction mold (3) is engaged with the pulp molded product transfer mold, a manufacturing gap is formed between the slurry suction mold (3) and the pulp molded product transfer mold.

7. A molded product made by combining the pulp molded product according to claim 5, characterized in that: The molded product (4) comprises a main body portion (41) fitted with the accommodating cavity (11) and a side portion (42) fitted with the bearing portion (12), and a groove (43) is provided on the lower surface of the side portion (42).

8. The molded article according to claim 7, wherein The groove (43) separates the side portion (42) into a flat section (421) connected to the main body portion (41) and a folded section (422) away from the main body portion (41).

9. The molded article according to claim 8, wherein The length of the flattened section (421) is configured to be adapted to the distance between the pre-pressing protrusion (13) and the accommodating cavity (11).

10. A preparation system comprising a hot pressing mold assembly (5), wherein the hot pressing mold assembly (5) comprises a first mold (51) and a second mold (52), characterized in that: Also included is a pulp molded product mold as claimed in claim 5.

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