Paper pulp mold and pulp molded articles thereof

Abstract

The invention provides a mold of paper pulp and paper pulp articles shaped by the mold, where the mold of the paper pulp is made up of top mold body and bottom mold body. A space appears as both bodies are combined together, where the top and bottom bodies have corresponding protrusions and hollows respectively. Each has a plurality of through holes, which are set at the surfaces and the lateral sides of the top and bottom mold bodies for accommodating pulp flowing in and pulp pumping pipes plugging in and further for the shaft to hold the mold for rotation, which helps in lifting the average covering in the space encircled by the top and bottom mold bodies, to shape solid paper pulp articles.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to molds of paper pulp and paper pulp articles shaped according to the mold, specifically to a mold of paper pulp available for inserting a pumping pipe from its top side or laterals, so as to favor pumping pulp into the mold, and further to facilitate the mold to accumulate more pulp by rotating the mold, to promptly manufacture quality paper pulp articles that feature copious hollows and protrusions in appearance and powerful in strength and bearing capability.

2. Description of the Prior Art

Paper pulp articles are made of and shaped from paper pulp; therefore, good for recycling and reproducing, and especially conforming to the favorable traits of environmental protection and reusing. That's the reasons that pulp articles gradually gain popularity from industries and have those industrial users' delight in adopting. Paper pulp articles, weighed light, can be used for the supplies as bowls, plates and the like. Pulp articles, weighted heavy, can be the pallets for bearing merchandise. For the moderate weight, molded articles can be used as the packaging containers for loading commodities or the separating stuff in the containers which were used as packing material or dividing material. The categories and applications of pulp molded products are growing diversified.

Paper pulp articles are generally shaped by having the mold to pump in paper pulp. The most common way is shown in FIG. 1. A pulp pumping mold 10, having a plurality of pumping-in holes 11, are pumping in paper pulp 21 onto a metal net 12 on the surface of the pulp pumping mold 10. Since paper pulp 21 is some sort of thick liquid of fiber material, it is quite easy to adhere to the metal net 12. Once the pulp gets dried, it will flake off the pulp pumping mold 10, forming the paper pulp article 20 as shown in FIG. 2. In this type of production, the pulp pumping mold is a single piece mold, where a pattern set up on its surface determines the shape of the molded paper article. This type of molds is usually used in the small paper pulp products with a smoother shape in appearance. Therefore, for developing paper pulp products bearing heavy weight (for instance: pallet) by this type, it has to separate multiple structures into multiple moldings, followed by assembling the moldings together. It could be using several layers of molded articles to form a platform, which is for boosting the overall strength and bearing capability. Unfortunately, this approach brings about a complicated production, a relative rise in the defective rate of production, which substantially lifts the production time and cost. The inventor conceived the idea of an improvement upon this defection, where the idea triggered the creative notions of this invention—a better bearing capability of a paper pulp article is from its structure of copious hollows and protrusions, and a better strength is subject to more thickness of an article. Therefore, how to invent a mold that is able to shape a copious plurality of hollows and protrusions in a single molding, and to pump in enough pulp for better intensity, is the target for improvement. Accordingly, the inventor has devoted tremendous efforts in the relevant researches to come to the present invention.

SUMMARY OF THE INVENTION

The objective of the present invention is to provide a mold of paper pulp that embodies a molded article a copious numbers of hollows and protrusions on its surface with a potent strength and to provide paper products molded by the mold.

The paper pulp mold of the present invention is made of integral parts: top mold body and bottom mold body. The top mold body and bottom mold body correspond to convex structure and concave structure respectively. A hollow is formed by the combination of the top mold and bottom mold bodies, where through holes are set up at corresponding locations of the two surfaces, for providing pulp flowing in and for pumping pipes inserting in. The pumping pipe pumps in the pulp from outside the mold to uniformly spread in the space encircled by the top and bottom bodies, to shape into a solid paper product.

As in the foregoing structure, holes are established at the laterals of the body combined by the top and bottom bodies to provide pulp flowing in and pulp pumping pipes inserting in.

In the present invention, the holes offer control axles for plugging in and holding, where the mold can then be rotating in the pulp, which furthers the spreading of the pulp effectively.

In the present invention, a paper pulp product that was molded by the combination of the top and bottom bodies through the pulp pumping process is the same product shaped by the mold.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram sowing the function of prior art pulp pumping mold;

FIG. 2 is a schematic diagram sowing a finished paper pulp article by a prior art pulp pumping mold;

FIG. 3 is a three dimensional top view showing the top mold body of the example of the present invention;

FIG. 4 is a three dimensional bottom view showing the top mold body of the example of the present invention;

FIG. 5 is a three dimensional top view showing the bottom mold body of the example of the present invention;

FIG. 6 is a three dimensional bottom view showing the bottom mold body of the example of the present invention;

FIG. 7 is a three dimensional assembled view of the example of the present invention;

FIG. 8 is an assembled longitudinal sectional view of the example of the present invention;

FIG. 9 is an assembled side view of the example of the present invention;

FIG. 10 is a three dimensional schematic diagram showing the mold held by the control axles of the example of the present invention; and

FIG. 11 is a side schematic diagram showing the mold held by the control axles of the example of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

To achieve the foregoing objective of the present invention, the adopted techniques and the achievable goals are detailed described with reference to the following preferred example and the accompanying drawings, which will help to comprehend the present invention.

The example of the present invention is a mold 30 of paper pulp, assemble by a top mold body 31 and a bottom mold body 32, where the top and bottom bodies 31, 32 are separable into a stand alone mode, or are combinable into a whole—a finished mold 30. The top mold body 31 is shown in FIGS. 3-4, where FIG. 3 is a three dimensional top view of the top mold body, and FIG. 4 is a three dimensional bottom view of the top mold body. The top mold body 31 forms a plurality of downward protrusions 311 on its surface at a single molding, where four protrusions 311 construct a support group. A plurality of downward projections 312 are set up in lines. Through holes 313 are set to pass through the top and bottom bodies. A short wall 314 is set on each of two adjacent sides of four corners, where each has a downward semicircular through hole 315.

FIGS. 5-6 show a three dimensional view of the bottom mold body, where FIG. 5 is a three dimensional top view and FIG. 6 is a three dimensional bottom view. The bottom mold body 32 has a dented concavity 321 at a location corresponding to each of the support group. For the downward projections 312, there are projections 322 at corresponding locations that crossed with the downward projections 312. It also has same amount of through holes 323 that are counterparts of the through holes 313. A plurality of upward semicircular through holes 325 corresponding to the downward semicircular through holes 315 are set up at the lateral sides.

The combination of the top mold body 31 with the bottom mold body 32 is shown in FIGS. 7-9, where FIG. 7 is a three dimensional assembled view of the top and bottom mold bodies 31, 32, FIG. 8 is a longitudinal section view, and FIG. 9 is a side view. As the top and bottom mold bodies 31, 33 are put together; the support group made by four downward protrusions is plugged in a dented concavity 321 with a distance in between. The downward projections 312 are contacting with corresponding upward projections 322 with a distance in between too. Each through hole 313 has its corresponding through hole 323 that enables a fit of the two holes. Meanwhile, each semicircular through hole 315 has its corresponding semicircular through hole 325 and both are combined to form a circular through hole.

The top and bottom mold bodies 31, 32 form a stable combinational structure by plugging the support groups in the dented concavities 321 and by crossing the downward projections 312 with the upward projections 322. There is some space kept between the top and bottom mold bodies 31, 32, where the mold, immerged in the liquid thick pulp, absorbs pulp in mass by using pulp pumping pipe through the through hole 313, 323 or the hole combined by the semicircular holes 315, 325, to the space encircled by the top and bottom mold bodies, such that the space are filled with the pulp enough and evenly. Once the pulp gets dried, a paper pulp article of copious hollows and protrusions (to have better bearing ability) and of wide in thickness (to have great strength), can be obtained by dividing apart the top and bottom mold bodies 31,32. The paper products are produced by all-in-one molding (not an assembly of separated parts).

The motions of the mold 30 immerged in the liquid thick pulp are controlled by another machine are shown in FIGS. 10-11. The control shaft 41 of the other machine (not shown in the figures) pierces in the mold 30 through the holes (the hold is made of two half-hole 315, 325) of its lateral sides, to hold the mold. Since there are two holes on each lateral side of the mold 30, the control shaft 41 is divided into two poles at its front, for better match with the holes and the holding of the mold. The motions of putting the mold 30 into or taking it out from the pulp tank are done by the control shaft 41 of another machine. The pulp pumping pipes are available to be set inside the control shaft 41 for pulp pumping to the encircled space of the mold 30. While in pulp pumping, the mold 30 is put in rotations by the shaft 41 of another machine, which further enhances the average covering. A selection of rotation or not, and the duration of rotation are based on the operator's decision.

Accordingly, the mold for the paper products of the present invention is made up of top and bottom mold bodies, where the top and bottom bodies have corresponding protrusions and hollows respectively. A space appears as both bodies combine together. A plurality of through holes are set at the surfaces and the lateral sides of the top and bottom mold bodies for accommodating pulp pumping pipes and for the shaft to hold the mold for rotation, which helps in lifting the average covering in the space encircled by the top and bottom mold bodies. Once opening the mold, a paper pulp article in an exceptional bearing capability and strength is gained in an all-in-one molding.

In general, the disclosed paper pulp mold and molded paper products thereof of the present invention are not presented in any of a publication or paper, and are a brand new apparatus and articles without public use, which fully compliant to the requirement of absolute novelty. Moreover, the present invention adopts all-in-one molding for producing paper pulp products that feature exceptional strength and bearing ability, a relatively shortened production time and a lift of yield rate, which will substantially lower the cost. It means the invention is compliant to the requirements of non-obviousness and usefulness which by U.S. Patent Statue is entitled to utility patent.

The foregoing description is the preferred example of the present invention, which is not restrictive for the claims of the present invention, and the equivalent structural variances by the technical principles of the present invention, are construed as covered by the claims of the present invention.

Claims

1. A mold of paper pulp, comprising: a top mold body and a bottom mold body, where the top and bottom bodies correspond to convex structures and concave structures respectively, and a hollow being encircled by the top body and the bottom body, while through holes are set up at corresponding locations of the surfaces of the top and bottom bodies, providing pulp for flowing in and providing pumping pipes for inserting in as the mold being soaked in the pulp, where the pumping pipes absorb the pulp to uniformly spread in the hollow encircled by the top and bottom bodies, so as to mold solid paper products.

2. The paper pulp mold as in claim 1, wherein the lateral sides of the combined mold by the top and bottom mold bodies have holes which provide pulp for flowing in and pulp pumping pipes for inserting in.

3. The paper pulp mold as in claim 1 or 2, wherein the combined mold of the top and bottom mold bodies allows control shafts to pierce into its corresponding holes for better holding, and to rotate in the pulp.

4. A paper pulp article being molded by the paper pulp mold, where the mold for the paper pulp article comprises a top mold body and a bottom mold body, which correspond to convex structures and concave structures respectively, and a hollow being encircled by the top body and the bottom body, while through holes are set up at corresponding locations of the surfaces of the top and bottom bodies, offering the pulp for flowing in and offering pumping pipes for inserting in as the mold being soaked in the pulp, where the pumping pipes absorb the pulp to uniformly spread in the hollow encircled by the top and bottom bodies, so as to shape solid paper products by the mold.

5. The paper pulp article molded by the paper pulp mold as in claim 4, wherein the lateral sides of the combined mold by the top and bottom mold bodies have holes which provide the pulp for flowing in and pulp pumping pipes for inserting in.

6. The paper pulp article molded by the paper pulp mold as in claim 4 or 5, wherein the combined mold of the top and bottom mold bodies allows control shafts in piercing into its corresponding holes for better holding, and for rotating in the pulp.