TWI588319B - Dredginging system for wet paper shaping, wet paper shape product and method for forming wet paper shape product - Google Patents

Description

Wet paper plastic pulping system, wet paper plastic product and wet paper plastic product forming method

The invention relates to a method for forming a wet paper plastic pulping system, a wet paper plastic product and a wet paper plastic product, in particular to a molding technology of a wet paper plastic product.

In the slurry processing process of the existing wet paper-plastic product forming technology, the slurry tank is used for storing pulp, and the components of the pulp include, for example, plant fragments, various fibers, water and other raw materials, etc., and then dipped into the slurry tank by using a mold. Then, the pulp is lifted up from the sump to form a wet paper body or a paper product on the mold.

In the prior art, a slurry of pulp is first taken up in a slurry tank by a mold, and then the mold is separated from the slurry tank and clamped with another corresponding mold to form a wet paper between the two molds. Embryo. If at least one narrow width groove (for example, the groove has a transverse cross-sectional width of between 0 and 8 mm) is formed on the wet paper body, the slurry is often formed adjacent to the upper opening of the groove. A stacked barrier structure (commonly known as bridging phenomenon), which tends to cause the groove to fail to form or break the structure. Although it is possible to use the shorter fiber length in the slurry to avoid bridging; However, the shorter fiber length may cause the overall strength of the wet paper body or the paper-plastic product to be greatly reduced, thereby affecting the performance of the finished product.

Therefore, there is a need to provide a wet paper pulping system to solve the above problems.

In order to solve the above problems, an object of the present invention is to provide a wet paper pulping system which can be used not only for rapid drying and molding of a wet paper-plastic semi-finished product and/or a wet paper-plastic final product, but also to solve the bridging phenomenon.

To achieve the above objects, the present invention comprises a wet paper pulping system comprising a slurry tank and a mold assembly.

The at least one slurry tank is used to load a pulp. The mold assembly includes a lower mold and an upper mold. The lower mold has a first surface and the first surface forms at least one groove and at least one first through hole, and is used for collecting the pulp slurry in the pulp from the slurry tank to the first surface. The upper mold has a second face and the second face forms at least one pair of at least one bump that should be at least one groove. The second side of the upper mold sinks below the level of the pulp. The second face of the upper mold is correspondingly clamped to the first face of the lower mold under the liquid level of the pulp. Further, at least a portion of the slurry forms at least one wet germ layer between the second side of the upper mold and the first side of the lower mold.

In a preferred embodiment, further comprising an extension means for sinking the second side of the upper mold below the level of the pulp.

In a preferred embodiment, the at least one attraction device is for accelerating the discharge of water and/or water vapor contained in the at least one wet germ layer.

In a preferred embodiment, the wet paper pulping system further includes at least one web disposed on the first side and forming a pair of shapes corresponding to the first side and the at least one groove. The at least one mesh is configured to retain the at least one wet germ layer and prevent the at least one wet germ layer from entering the at least one first through hole to prevent the at least one first through hole from discharging the water in the at least one wet germ layer And / or water vapor.

In a preferred embodiment, when the at least one wet germ layer comprises more than two layers, the at least one wet germ layer is different in size but tightly bonded to each other.

In a preferred embodiment, the at least one wet germ layer correspondingly forms at least one groove between the upper mold and the lower mold, and the at least one groove of the at least one wet germ layer has a transverse cross-sectional width of between 0 and 8 mm. .

In a preferred embodiment, the transverse cross-sectional width is between 0 and 6 mm.

In order to achieve the above object, the present invention also includes a wet paper-plastic product produced by using the at least one wet germ layer produced by the wet paper pulping system described above.

In a preferred embodiment, the at least one wet germ layer comprises a plurality of layers of wet germ layers stacked on one another and corresponding in shape to each other.

In order to achieve the above object, the present invention also includes a method for forming a wet paper, comprising: first, sinking a lower mold into a slurry tank to collect a pulp slurry of the slurry tank to a first side of the lower mold on.

Next, the second side of one of the upper molds is moved to the surface of the pulp.

Next, the second side of the upper mold is clamped correspondingly to the first side of the lower mold under the liquid level of the pulp.

Next, at least a portion of the slurry forms at least one wet germ layer between the first side of the upper mold and the second side of the lower mold.

Finally, a wet paper product is produced using the at least one wet germ layer.

In a preferred embodiment, the water in the at least one wet germ layer is extracted by at least one first through hole disposed in the lower mold and/or the at least one second through hole of the upper mold by a suction device and/or water vapor.

In a preferred embodiment, after at least a portion of the slurry forms at least one layer of wet germ between the second side of the upper mold and the first side of the lower mold, the method further includes: moving the upper mold And the lower mold to the liquid surface of the pulp; and the upper mold and the lower mold are released from the liquid surface of the pulp.

In a preferred embodiment, at least one hot pressing treatment is performed on the at least one wet germ layer.

According to the mold assembly of the wet paper pulping system of the present invention, the pressure clamping process is performed under the pulp surface of the slurry tank, thereby avoiding the occurrence of bridging and improving the product yield.

100‧‧‧ Slurry system

110‧‧‧ Groove

118‧‧‧Mold components

120‧‧‧first through hole

125‧‧‧second through hole

130‧‧‧Mold

135‧‧‧ first side

140‧‧‧Upper mold

145‧‧‧ second side

150‧‧‧Bumps

160‧‧‧

168‧‧‧ slurry

170‧‧‧ Wet germ layer

175‧‧‧ pulp trough

177‧‧‧Pulp

180‧‧‧Extension

190‧‧‧ attracting device

W1‧‧‧ section width

1702‧‧‧ Wet embryo groove

1 is a perspective view showing a mold assembly of a wet paper pulping system according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view showing the mold assembly of the wet paper pulping system according to the present invention before the mold clamping.

Fig. 3 is a schematic cross-sectional view showing the mold assembly of Fig. 2 at the time of mold clamping.

Fig. 4 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a first embodiment of the present invention.

Fig. 5 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a second embodiment of the present invention.

Fig. 6 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a third embodiment of the present invention.

Fig. 7 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a third embodiment of the present invention.

The following description of various embodiments is presented to illustrate the specific embodiments The directional terms mentioned in the present invention, such as "upper", "lower", "before", "after", "left", "right", "inside", "outside", "side", etc., are merely references. The direction of the schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

Refer to Figures 1 and 2. 1 is a perspective view of a mold assembly of a wet paper pulping system 100 in accordance with the present invention. 2 is a schematic cross-sectional view of a mold assembly of a wet paper pulping system 100 in accordance with the present invention prior to mold clamping. The wet paper pulping system 100 includes a pulp tank 175, a mold assembly 118, an extension device 180, and a suction device 190. The slurry tank 175 is used to load a pulp 177. The mold assembly 118 includes an upper mold 140 and a lower mold 130.

The lower mold 130 forms a first surface 135, at least one groove 110, and at least one first through hole 120, wherein the at least one groove 110 and the at least one The first hole 120 is a plurality of first through holes 120, and is further distributed around the inner wall surface of the at least one groove 110, and is disposed on the first surface 135. Moreover, the number of the at least one groove 110 is not particularly limited, and the manufacturer can increase or decrease according to actual needs. A surface of the at least one groove 110 and the first surface 135 of the lower mold 130 is further provided with a mesh 160 corresponding to the shape of at least one groove 110. The number of meshes or the number of meshes of the mesh 160 can be as needed. Increasing or decreasing; in other embodiments, other devices having a porous structure may be used in place of the mesh 160. In other embodiments, the network 160 may include a plurality of different meshes stacked on top of one another.

The upper mold 140 forms a pair of second faces 145 that should be the first face 135, at least one protrusion 150 corresponding to the groove 110 and at least one second through hole 125, wherein the bump 150 and the at least one The second through hole 125 is located on the second surface 145. In this embodiment, the at least one second through hole 125 may be a plurality of second through holes 125 and further distributed on the upper surface of the bump 150.

The extension device 180 is configured to raise the second surface 145 of the upper mold 140 to the liquid level of the pulp 177 in the slurry tank 175 or to sink below the liquid level of the pulp 177 in the slurry tank 175. When the second face 145 of the upper mold 140 sinks below the level of the pulp 177, the slurry 168 in the pulp 177 is collected in the slurry tank 175 at the first side of the lower mold 130. The second surface 145 of the upper mold 140 and the first surface 135 of the lower mold 130 are pressed against the liquid surface of the pulp 177 to be relatively closed, and at least one portion of the slurry 168 is further embossed. Forming a wet germ layer 170 between the second face 145 of the upper mold 140 and the first face 135 of the lower mold 130 (see FIG. 3); conversely, when the second face of the upper mold 140 is 145 rises to the level of the pulp 177 The second surface 145 of the upper mold 140 and the first surface 135 of the lower mold 130 are separated from each other.

The suction device 190, such as a vacuum pump, is respectively connected to the at least one second through hole 125 of the upper mold 140 and the at least one first through hole 120 of the lower mold 130 through a pipeline for the upper mold 140 and the The lower mold 130 is vacuumed at the time of mold clamping; however, in various embodiments, the upper mold 140 and the lower mold 130 may be connected to each other using a plurality of suction devices 190 for vacuum extraction.

Please refer to FIGS. 2 and 3 for a schematic cross-sectional view of the upper mold 140 of the wet paper pulping system 100 according to the present invention when the lower mold 130 is clamped. When the extension device 180 causes the second surface 145 of the upper mold 140 to sink into the liquid level of the pulp 177 in the slurry tank 175, the second surface 145 of the upper mold 140 and the lower mold 130 When the first surface 135 is pressed against the liquid surface of the pulp 177 in the slurry tank 175 to be relatively closed, at least a portion of the slurry 168 is on the second surface 145 of the upper mold 140 and the lower mold. The wet germ layer 170 is formed between the first faces 135 of 130. The web 160 positioned on the upper surface of the first side 135 except that the slurry 168 is formed on the web 160 and retains the wet germ layer 170 to prevent the slurry 168 in the wet germ layer 170 from entering the at least one In the first consistent hole 120, the at least one first through hole 120 is prevented from being discharged from the water and/or water vapor in the wet germ layer 170. At the same time, the at least one second through hole 125 located on the second surface 145 and the at least one first through hole 120 located on the first surface 135 are used for discharging water in the wet germ layer 170 and/or Water vapor; and while the upper mold 140 and the lower mold 130 are being closed, the suction device 190 performs vacuum extraction to flow the wet germ layer 170 into the at least one second through hole 125 of the upper mold 140 and The water and/or water vapor in the at least one first through hole 120 of the lower mold 130 is further drawn to The upper mold 140 and the lower mold 130 are outside the suction device 190.

In the preferred embodiment, when the second surface 145 of the upper mold 140 and the first surface 135 of the lower mold 130 are pressed under the liquid surface of the pulp 177 in the slurry tank 175, the mold is relatively closed. When the at least one portion of the slurry 168 is formed between the second surface 145 of the upper mold 140 and the first surface 135 of the lower mold 130, the lower mold 130 has the At least one groove 110, such that the wet germ layer 170 also forms a wet embryo groove 1702 corresponding to at least one groove 110 shape between the upper mold 140 and the lower mold 130, in particular, the wet embryo recess of the wet germ layer 170. The transverse section width W1 of the groove 1702 is between 0 and 8 mm; preferably, the transverse section width W1 is between 0 and 6 mm. In other words, when it is required to form a narrow wet embryo groove 1702 on the wet germ layer 170 (if the transverse section width W1 of the wet embryo groove 1702 is between 0-8 mm), the upper mold 140 and the lower mold are utilized. 130 is clamped under the liquid surface of the pulp 177 in the slurry tank 175 to form the wet germ layer 170. Since the fiber in the slurry 168 is heavier than water and has a higher water pressure under the liquid surface, the fiber is easily precipitated. The bottom of the wet embryo groove 1702 does not accumulate at the opening above the wet embryo groove 1702, so that bridging phenomenon as is conventional in the prior art does not occur; in particular, when the wet embryo layer 170 is wet The bridging phenomenon can also be avoided when the lateral cross-sectional width W1 of 1702 is between 0 and 6 mm.

In other embodiments, a plurality of overlapping wet germ layers 170 may also be formed by multiple clamping. That is, when the first wet germ layer 170 includes two or more wet germ layers 170, each of the wet germ layers 170 is different in size but closely coupled to each other, and each of the wet germ layers 170 is stacked on each other and the plurality of wet germ layers 170 are shaped to each other. correspond.

The present invention also provides a wet paper product which is produced using the at least one wet germ layer 170 produced by the wet paper pulping system of the various embodiments described above.

In the present invention, whether a single mold assembly or a plurality of mold assemblies are used for slurrying and pressing in one or more sizing tanks to form a plurality of wet germ layers, and the plurality of wet germ layers can be stacked on each other, and The shapes of the multilayer wet germ layers can correspond to each other.

Fig. 4 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a first embodiment of the present invention.

First, in step S01, a portion of the slurry 168 which is submerged in a slurry tank 175 and collected in the pulp 177 of the slurry tank 175 is precipitated onto a first surface 135 of the lower mold 130 (eg, 2 is shown). Next, step S02 is performed to move a second surface 145 of the upper mold 140 to the liquid surface of the pulp 177 in the slurry tank 175. Then, in step S03, the second surface 145 of the upper mold 140 and the first surface 135 of the lower mold 130 are pressed and clamped under the liquid surface of the pulp 177 in the slurry tank 175 (( As shown in Fig. 3. Next, step S04 is performed such that at least a portion of the slurry 168 as shown in Fig. 2 is on the second side 145 of the upper mold 140 and the second mold 130. A wet germ layer 170 is formed between one side 135 (as shown in Fig. 3). Finally, step S05 is performed to make a wet paper product using the wet germ layer 170. Compared to the prior art, the lower mold 130 is slaughtered. Thereafter, the lower mold 130 is separated from the pulp 177, and then the upper mold 140 and the lower mold 130 are clamped on the liquid surface. In other words, when the wet germ layer 170 needs to form a narrow wet embryo groove. 1702 (if the transverse section width W1 of the wet embryo groove 1702 is between 0-8 mm), the upper mold 140 and the lower mold 130 are in the slurry tank 175 in the forming method of the wet paper plastic product of the present invention. The step of clamping the liquid 177 of the pulp 177 to form the wet germ layer 170, wherein the fiber in the slurry 168 is heavier than water and the water pressure under the surface The higher principle is that the fiber is precipitated at the bottom of the wet embryo groove 1702 without accumulating at the opening above the wet embryo groove 1702, so that it does not occur as in the prior art. A common bridging phenomenon; in particular, the bridging phenomenon can also be avoided when the transverse cross-sectional width W1 of the wet embryo recess 1702 of the wet germ layer 170 is between 0 and 6 mm.

Fig. 5 is a flow chart showing the steps of a method for forming a wet paper according to a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that, between step S02 and step S03, step S06 is further performed, and a suction device 190 is used to pass through at least one first through hole 120 of the lower mold 130 and / or at least one second through hole 125 of the upper mold 140 extracts water and/or water vapor in the wet germ layer 170.

Fig. 6 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a third embodiment of the present invention. The difference between the third embodiment and the first embodiment is that, between step S04 and step S05, step S07 is further performed to move the upper mold 140 and the lower mold 130 to the liquid surface of the pulp 175. Next, in step S08, the upper mold 140 and the lower mold 130 are released from the liquid surface of the pulp 175.

Figure 7 is a flow chart showing the steps of a method for forming a wet paper-plastic product according to a fourth embodiment of the present invention. The difference between the fourth embodiment and the first embodiment is that between step S04 and step S05, step S09 is further performed to perform at least one hot pressing process on the wet germ layer 170.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings should also be considered as The scope of protection of the present invention.

100‧‧‧ Slurry system

110‧‧‧ Groove

118‧‧‧Mold components

130‧‧‧Mold

135‧‧‧ first side

140‧‧‧Upper mold

145‧‧‧ second side

150‧‧‧Bumps

160‧‧‧

168‧‧‧ slurry

170‧‧‧ Wet germ layer

175‧‧‧ pulp trough

177‧‧‧Pulp

180‧‧‧

190‧‧‧ attracting device

Claims (13)

A wet paper pulping system comprising: a pulp tank for loading a pulp, and a mold assembly comprising: a lower mold having a first side and the first side forming at least one groove and at least one first a through hole, and is used for collecting the slurry of the pulp from the slurry tank to the first surface; an upper mold having a second surface and the second surface forming at least one pair of at least one groove a bump; and the second side of the upper mold sinking into the liquid level of the pulp of the slurry tank, and the first surface of the lower mold is correspondingly clamped under the liquid surface of the pulp, thereby At least a portion of the slurry forms at least one wet germ layer between the first side of the upper mold and the second side of the lower mold. The wet paper pulping system of claim 1, further comprising an extension device for sinking the second side of the upper mold into the liquid level of the pulp. The wet paper pulping system of claim 1, wherein the wet paper pulping system further comprises at least one suction device for accelerating the discharge of water and/or water vapor contained in the at least one wet germ layer. . The wet paper pulping system of claim 1, further comprising at least one mesh disposed on the first surface and forming a pair of shapes corresponding to the first surface and the at least one groove, the at least a mesh for retaining the at least one wet germ layer and preventing the at least one wet germ layer from entering the at least one first through hole to prevent the at least one first through hole from discharging water in the at least one wet germ layer and/or Or water vapor. The wet paper pulping system of claim 1, wherein when the at least one wet germ layer comprises two or more layers, the at least one layer of wet germ layers are different in size but tightly coupled to each other. The wet paper pulping system of claim 1, wherein the at least one wet germ layer correspondingly forms at least one groove between the upper mold and the lower mold, the at least one groove of the at least one wet germ layer The transverse section width is between 0-8 mm. The wet paper pulping system of claim 6, wherein the transverse section width is between 0 and 6 mm. A wet paper-plastic product produced by using the at least one wet germ layer produced by the wet paper pulping system described in claim 1 or 5. The wet paper-plastic product of claim 8, wherein the at least one wet germ layer comprises a plurality of layers of wet germ layers stacked on each other and corresponding in shape to each other. A method for forming a wet paper-plastic product, comprising: sinking a lower mold into a slurry tank to collect a slurry of the pulp of the slurry tank to a first surface of the lower mold; and moving a second surface of the upper mold Up to the surface of the pulp; the second side of the upper mold is correspondingly clamped to the first side of the lower mold under the liquid level of the pulp; at least a portion of the slurry is in the upper mold Forming at least one wet germ layer between the first side and the second side of the lower mold; and using the at least one wet germ layer to produce a wet paper product. The method for forming a wet paper-plastic product according to claim 10, further comprising: using at least one first through hole and/or at least one of the upper molds of the lower mold by using a suction device A second through hole extracts water and/or water vapor in the at least one wet germ layer. The method of forming a wet paper-plastic product according to claim 10, wherein at least a portion of the slurry forms at least one layer between the first side of the upper mold and the second side of the lower mold. After the wet germ layer, the method further comprises: moving the upper mold and the lower mold to the liquid surface of the pulp; and demolding the upper mold and the lower mold on the liquid surface of the pulp. The method for forming a wet paper-plastic product according to claim 10, further comprising: performing at least one hot pressing treatment on the at least one wet germ layer.