KR20080051674A - Pulp molding system - Google Patents

Abstract

A pulp molding apparatus is provided to lower the cost of installation and operation of equipment by reducing number of the processes for draft papers and to shorten the process cycle time. A first-made molding part(10) forms a first-made mold(M) from a draft paper solution, compresses and performs primary dehydration. Heating-dehydration part arranged in one side of the first-made molding part receives the primary dehydrated first-made mold, dehydrates and dries through heating and pressurizing between an upper part(13) and a lower part(12). An outlet part is arranged in one side of the heating-dehydration part, receives and discharges the dried-out mold. A netlike carrier net installed among the first-made molding part, the heating-dehydration parts and the outlet part transports the mold. A fixing mesh established in the upper region of the first-made molding part filters the draft paper solution. A vacuum suction tube(12a) lowers the water level of the draft paper solution by sucking water from under the fixing mesh. The lower part is installed to be accommodated to the draft paper solution tank(11) installed to connect the draft paper solution tank to the draft paper solution supply tube, and the first-made molding is formed on the lower part by supplying and discharging of the draft paper solution.

Description

Pulp molding system with one-way molding supply structure

Figure 1 shows the overall configuration of the pulp molding system proposed as a preferred embodiment in the present invention,

FIG. 2 shows a detailed configuration of an initial forming section in the pulp forming system of FIG.

3a to 3c are views showing the molding and primary dehydration process of the molded article through the molded article shown in Figure 2,

FIG. 4 shows a detailed configuration of a heating dehydration unit in the pulp forming system of FIG. 1,

FIG. 5 shows a detailed configuration of a molded article discharging unit in the pulp forming system of FIG.

6a to 6g sequentially show the molding process of the pulp product through the pulp molding system according to the present invention.

**** Explanation of symbols for the main parts of the drawing ****

1. Pulp Forming System

11. Paper liquor supply tank 11a. Paper liquor supply pipe

11b. Paper liquor discharge pipe

12. Bottom 12a. Vacuum suction tube

12b. Fixed mesh

13. Pictograph 13a. Vacuum clamp

13b. 14. cylinder with heater

15. Papermaking tank

20. 20 '. Heating dehydration part 21.

22. Pictograph 22a. Pneumatic clamp

22b. Heater 23. Cylinder

30. Outlet 31. Suction clamp

32. Cylinder 40. Carrier net

M, M ', M ". Molded

The present invention relates to a pulp molding system, and more particularly, by including a forging molding unit having an improved papermaking solution supply structure, a step of forming a molded article from a papermaking solution, and compressing and containing the molded article The present invention relates to a pulp forming system of a one-way molded water supply structure in which a primary dehydration step of dehydrating water is performed in a single step.

As is well known, due to the widespread use of pulp molding systems for molding pulp into a standardized shape, food containers and cushioning materials, which have been the mainstream of conventional plastic resins, are gradually being replaced by molded articles made of pulp.

The molded article made of the pulp is not only environmentally preferable due to its natural degradability compared to the molded article made of resin, and since harmful substances such as environmental hormones, which have recently been issued, do not occur, its use will be gradually expanded. It is expected.

The pulp moldings, however, generally comprise the steps of: supplying a papermaking solution to obtain a standardized crude molding; A first (pressurized) dehydration step of compressing the molded article at high pressure with room temperature or slight heating to remove moisture; In addition, since the manufacturing process is performed through a very complicated step such as several second and third (heating) dehydration steps to completely remove moisture contained in the dewatering molding through high temperature and pressure, the equipment becomes complicated, huge, and therefore expensive. And in circulation.

In order to solve this problem, the present inventors through the Republic of Korea Patent Publication No. 0427604, by disposing the first heating dehydration unit, the second heating dehydration unit and the product stacking parts on both sides of the raw material input unit is common to the raw material input unit An implemented pulp molding machine has been proposed. With the suggestion of such a pulp molding machine, the structure of the pulp molding machine can be greatly simplified.

However, the conventional pulp molding system including the present invention of the present inventors, due to the limitation of the structure for supplying the papermaking solution, the raw material supply unit for supplying the papermaking solution to form a molding, and providing a high pressure to the molding to provide moisture Since the primary pressurized dewatering unit to be removed first has a dual structure, the incident cost of building and maintaining the system is still high.

That is, in the conventional pulp molding system, the raw material input part has a structure in which a papermaking liquid tank provided on the upper part of the lower mold formed at the lower part of the lower mold is formed to form a crude molded product, and the raw material input part is formed on the lower mold. It is structurally impossible to implement a pressurized dehydration process to pressurize the molded article to primarily remove moisture contained in the molded article.

Therefore, a first heating dehydration part and a second heating dehydration part are separately formed on one side of the raw material input part by receiving the crude molding formed from the raw material input part through a carrier net and dehydrated and dried by pressing and heating. If it is configured to be, the problem arises that the associated costs of construction and maintenance of the pulp mold forming system increases.

The present invention has been made to solve the problems of the conventional pulp molding machine as described above, the step of forming a molded article from the papermaking solution through an initial molding unit provided with an improved papermaking solution supply structure, compressing the molded article to the first molding It is an object of the present invention to provide a pulp molding system in which the step of first removing the contained moisture is performed in a single process, thereby greatly improving the efficiency of the equipment.

Pulp molding system of the one-way molding supply structure according to the present invention for achieving the above object,

An initial molding unit which forms an initial molding from the papermaking solution, and compresses the first molding to dehydrate the first molding;

At least one heated dewatering part disposed on one side of the first forming part which receives the first dehydrated present molding and dehydrates and dries through high temperature and pressure between an upper mold and a lower mold;

A discharge part disposed on one side of the heating dehydration part to receive and discharge a dried molded product; And

It is installed to be transported up and down, left and right between the initial forming part, the heating dehydration part and the discharge part, and comprises a network carrier net for transferring the molding therebetween;

The initial molding unit,

The lower mold of the form that is provided with a fixed mesh for filtering the paper liquid, and a vacuum suction tube for lowering the water level by sucking the water contained in the paper liquid to the lower portion of the fixed mesh, the paper liquid connected to the paper liquid tank A feed pipe is installed to be received in a papermaking liquid supply tank in communication with each other, thereby forming a crude molding on the lower mold through the supply and discharge of the papermaking liquid; The upper part of the lower mold, the phase is controlled by the drive of the cylinder is made of a structure installed spaced apart from the upper mold for pressing and dehydrating the molded article formed on the lower mold; It is characterized in that the primary dehydration by the formation and pressurization of the molded article is configured to be implemented continuously.

That is, according to the configuration described above, in the above-mentioned molding section, the papermaking liquid is supplied to the papermaking liquid supply tank through the papermaking liquid supply pipe to form a water level higher than the phase of the lower mold, and then the moisture contained in the papermaking liquid through the vacuum suction pipe. Instantaneously inhaling to form a water level below the phase of the lower mold, whereby water is discharged and the pulp is filtered on a fixed mesh at the top of the lower mold to form an initial molding of pulp at the top of the lower mold; The upper mold is formed spaced apart on the upper portion of the lower mold is pressed down to press the first molding formed on the upper portion of the lower mold, the step of depressurizing the contained moisture first is sequentially implemented sequentially.

At this time, the upper mold provided in the counter-molded part may be configured to only perform dehydration by pressurization, or may be provided with a heater therein to simultaneously perform heating at a relatively low temperature from 70 ℃ to 120 ℃ with pressure. .

Here, the first step of dehydration by the forming step and pressurization of the papermaking liquid from supply to discharge of the papermaking liquid can be achieved in a very short time compared to the subsequent dehydration and drying step, so that the heated dehydration part is cycled even if two or more tanks are arranged. Since there is no problem at all in time, it is necessary to determine the number of installations in consideration of the production cost and production efficiency of the apparatus required for mold making and the like.

And, preferably, the papermaking solution supply tank is further provided with a papermaking liquid discharge pipe connected to a point lower than the phase of the lower mold, so that the extra papermaking liquid is discharged instantaneously through the opening of the discharge pipe. This minimizes the mixing of the remaining paper liquor from the previous bath molding and the freshly supplied paper liquor later through the paper liquor supply pipe, which ensures that the paper liquor is always at a constant concentration, and that the paper liquor is just below the top of the lower mold. Due to maintaining the pulp entangled at the edge of the fixed mesh during pressing of the upper mold, it is possible to prevent the edge of the formed molding from being formed into an uneven irregular shape.

Hereinafter, with reference to the accompanying drawings will be described in detail the pulp molding system of the one-way molding supply structure proposed as a preferred embodiment in the present invention.

Figure 1 shows the overall configuration of the pulp molding system proposed as a preferred embodiment in the present invention, Figure 2 shows a detailed configuration of the initial forming part in the pulp molding system of Figure 1, Figures 3a to 3c Figure 2 shows the molding and the first dehydration process of the first molded article through the first molded part shown in Figure 2, Figure 4 shows the detailed configuration of the heating dehydration unit in the pulp molding system of Figure 1, Figure 5 The detailed configuration of the discharge section in the pulp forming system is shown.

Referring to these drawings, the pulp molding system 1 according to the present invention, the pulp contained in the papermaking liquid to a predetermined shape to form a molded article, and then dried it to be widely used as a food container or a buffer packaging material It is made to produce a molding.

In addition, when the initial molded product M that contains a large amount of moisture is immediately dried at a high temperature, it is not uniformly dried as a whole, only the surface is dried, and the shape is not uniform. The molded article M is pressurized to an upper mold heated to a temperature of approximately 80 占 폚 and dehydrated firstly, and secondly, pressurized to an upper mold heated to a high temperature of 200 占 폚 so that complete dehydration is achieved.

In detail, the pulp molding system 1 according to the present embodiment basically forms a countertop molded article M using a papermaking solution, and as shown in FIG. In the structure, there is provided a structure for the subsequent process with two heating dehydration parts 20, 20 ′ and a discharge part 30.

Then, between the above-mentioned forming part 10, each of the heating dehydration portion (20, 20 '), and the discharge portion 30 is provided with a carrier net 40, which is conveyed up, down, left and right, through this forming Molded and primary dehydrated molding (M) is supplied from the unit 10 is configured to dry and discharge through the heating dehydration unit (20, 20 ') and the subsequent discharge unit 30.

Here, the carrier net 40 is a known one configured to perform a left and right reciprocating action by a transfer part (not shown) and a vertical transfer action by a lifting cylinder (not shown). One less than the total number of the heated dehydration unit 20, 20 'and the discharge unit 30 is installed.

In the sheet forming section 10, a sheet forming solution supply structure as shown in FIGS. 2 to 3 is provided, and a sheet forming process for receiving a sheet of paper solution to form a sheet shaped molded article M having a predetermined shape, and the sheet forming By pressing and pressing the first molding (M) formed through the molding process, a process of firstly dehydrating the water contained in the first molding (M) is implemented sequentially.

Referring to FIG. 2, the sheet forming unit 10 includes a vacuum suction tube that instantly sucks moisture contained in the sheet liquid into the sheet liquid supply tank 11 in which the sheet liquid supply pipe 11a is connected. The lower mold 12 provided in communication with the lower mold 12a is installed therein, and the upper mold 12 is formed on the upper mold 12 by the phase of the lower mold 12 driven by the driving of the cylinder 14. Compress the upper die 13 is made of a structure provided to be spaced apart.

Then, the papermaking solution supply pipe (11a) has a structure in communication with the papermaking solution tank 15 to supply the papermaking solution from the papermaking solution tank (15) to the papermaking solution supply tank (11).

On the other hand, the upper surface of the lower die 12, a mesh-like fixed mesh 12b is provided, the papermaking liquid is sucked through the suction of the vacuum suction pipe 12a to form a molded article M, included in the papermaking liquid The pulp is configured to be filtered and settled thereon.

In addition, the upper surface of the lower mold 12, on which the counter-molded article M is formed, and the lower surface of the upper mold 13, which compresses the counter-molded article M formed on the lower mold 12, have a shape corresponding to the shape of the food container. The upper mold 13 is provided with a vacuum clamp 13a and a heater 13b such as a heat transfer plate for heating the counter-molded article M formed on the lower mold 12 to a low temperature so as to adsorb the molding. In the state heated to the temperature of about ℃, the molded article (M) formed in the lower mold is pressed.

Referring to the series of processes formed in the above-described forming section 10, first, as shown in Figure 3a to supply the paper liquid through the paper liquid supply pipe (11a) to form a water level higher than the phase of the lower mold 12 Next, as shown in FIG. 3B, the vacuum suction tube 12a instantaneously sucks moisture contained in the papermaking liquid to form a water level lower than the phase of the lower mold 12, so that the upper part of the lower mold 12, that is, the fixed mesh 12b. The upper mold 13, which is formed with pulp on the upper surface of the lower mold 12, is formed by lowering the lower mold 12 by driving the cylinder 14, as shown in FIG. 3C. The first molded article M formed at the top of the substrate is pressed and heated to dehydrate and preheat the moisture contained in the first molded article M.

Therefore, in the pulp molding system 1 according to the present embodiment, the structure which was conventionally binarized by the raw material supply part and the pressurized dewatering part is configured to be united by one unit called the initial molding part 10, where the initial molding (M) ) And the primary dehydration is implemented continuously, it is possible to obtain the effect of simplifying the structure and shortening the cycle timing according to production.

In addition, each of the heating dehydration parts 20 and 20 'that receive the molded product M in a state of being molded and primaryly dehydrated through the initial molding part 10 through the carrier net 40 is as shown in FIG. 4. The lower mold 21 on which the molded article M or the carrier net 40 on which the molded article M is placed is seated, as well as the lower mold 21. Pressing and heating the molding (M) seated on the lower mold 21 or the carrier net 40 while lifting and lowering by driving the cylinder 23, spaced apart in the upper portion of the dehydration of water contained in the molding (M) And the upper mold | type 22 to dry.

Here, the upper surface of the lower mold 21 on which the molded product M is placed, the bottom view of the upper mold 22 pressurizing the molding M, the upper mold 13 or the lower mold 12 of the initial molding part 10, and Similarly, a shape corresponding to the shape of the food container is formed, and the upper mold 22 includes a pneumatic clamp 22a for adsorbing the molding M and a heater 22b such as a heat transfer plate, and is heated to a temperature of approximately 200 ° C. Pressing the molding (M) in the state is a secondary dehydration process is made by pressure and heat.

In this embodiment, two heating dehydration units 20 and 20 'performing the secondary dehydration process are provided in the present embodiment. However, in some cases, more than one heating dehydration unit 20 or 20' may be provided. Proper control of pressurized dehydration conditions and cycle timings in 10) can reduce equipment costs while maintaining maximum production efficiency.

And, the discharge portion 30, as shown in Figure 5 by adsorbing the complete molded product (M) completely dried while passing through the heating dehydration unit (20, 20 '), the finished molded product At least one suction clamp 31 for sucking (M) and a cylinder 32 for adjusting the height of the suction clamp 31.

Therefore, the completed molding M, which has been dried through the heated dehydration unit 20 and 20 'and is supplied to the discharge unit 30 through the carrier net 40, is a suction clamp 31 of the discharge unit 30. Is absorbed and discharged to the outside. At this time, it is preferable that the transfer conveyor 33 is provided below the discharge unit 30 as in the present embodiment.

On the other hand, Figures 6a to 6g are shown in sequence the molding process of the pulp product through the pulp molding system according to the present invention, the pulp product in the pulp molding system according to the present invention with reference to Figures 3 and 6 below. The molding process will be described in detail.

First, as shown in FIG. 3 and FIG. 6A, a fixed amount of paper solution is supplied to the papermaking solution supply tank 11 through the papermaking solution supply pipe 11a of the sheet forming unit 10, and the lower mold 12 is completely immersed in the papermaking solution. In, the vacuum suction pipe (12a) installed in the lower mold 12 quickly absorbs the water contained in the paper liquid to lower the water level, the upper part of the lower mold 12, the predetermined molded article made of paper made of paper contained in the paper liquid (M) At this time, the papermaking liquor discharge pipe 11a is opened, and the papermaking liquor remaining on the outside of the lower mold 12 in the papermaking liquor supply tank 11 is discharged to the outside.

The formed molded article M is pressurized by the upper mold 13 heated to about 80 ° C. lowered by the driving of the cylinder 14 as shown in FIG. 6B, so that primary dehydration and preheating are performed. The molding M molded and primary dewatered through the part 10 is adsorbed through the vacuum clamp 13a of the upper mold 13 and installed on the right side through the carrier net 40 as shown in FIGS. 6C and 6D. The upper die 22 of the heated dehydrator 20, which is placed on the lower die 21 of the pressurized dehydration unit 20 and heated to about 200 ° C., is lowered by the driving of the cylinder 23 and placed in the lower die 21. The molding M is pressurized to a high temperature to perform secondary dehydration.

This secondary dehydration process is carried out continuously through each heating dehydration unit (20, 21 '), as shown in Figure 6d and 6e, the upper mold 22 is required in each heating dehydration unit (20, 20') By raising and lowering several times, the molding M can be dehydrated by pressurizing and heating to make it more uniform.

On the other hand, at the same time as the transfer of the primary dewatered molding (M), as shown in Figure 6d to 6e, the above-mentioned initial molding and the first dehydration process again performed another molding ( M '), and the molded product M' thus formed is placed on the lower mold 21 of the heating dehydration part 20 again through the carrier net 40 as shown in FIG. 6F. Then, the upper mold 22 of the heated dewatering unit 20 heated to about 200 ℃ is lowered to press the molding (M ') placed in the lower mold 21 to a high temperature to repeat the process of secondary dehydration.

And finally, the completed molding (M) is completed dehydration is adsorbed by the pneumatic clamp 22a of the upper mold 22 as shown in Figure 6g is supplied to the discharge portion 30 provided on one side by the carrier net, so that the final The pulp molded product supplied to the discharge part 30 is adsorbed by the suction clamp 31 and discharged to the outside.

In this way, in the pulp molding system 1 according to the present embodiment, one sheet forming section 10 and a series of heating dewatering sections 20 and 20 'disposed on one side of the sheet forming section 10 and the discharge section are provided. A series of processes according to molding, dehydration, and discharge through 30 are simultaneously and sequentially made to continuously manufacture pulp moldings made of pulp material.

In addition, a series of processes according to the molding, dewatering, conveying and drying of the pulp moldings through the first forming part 10, the heating dewatering part 20 and 20 ', the discharge part 30 and the carrier net 40 are performed. Not limited to the above-described operation, the controller (not shown) is implemented by appropriately controlling the molding time, drying time, and discharge time of the molding.

As described above, the pulp molding system according to the present invention is provided with an initial molding unit for sequentially performing initial molding and primary pressure dewatering through an improved papermaking liquid supply structure.

Therefore, the raw material supply part and the primary pressurized dehydration part which are conventionally configured to be dualized are realized to be unified by the first molding part, which greatly reduces the accompanying cost due to the construction and maintenance of the system, and also reduces the left and right and up and down transfer frequency of the carrier net. The cycle timing according to the molding can be greatly shortened.

Claims (4)

An initial molding unit which forms an initial molding from the papermaking solution, and compresses the first molding to dehydrate the first molding; At least one heated dewatering part disposed on one side of the first forming part which receives the first dehydrated present molding and dehydrates and dries through high temperature and pressure between an upper mold and a lower mold; A discharge part disposed on one side of the heating dehydration part to receive and discharge a dried molded product; And It is installed to be transported up and down, left and right between the initial forming part, the heating dehydration part and the discharge part, and comprises a network carrier net for transferring the molding therebetween; The initial molding unit, The lower mold of the form that is provided with a fixed mesh for filtering the paper liquid, and a vacuum suction tube for lowering the water level by sucking the water contained in the paper liquid to the lower portion of the fixed mesh, the paper liquid connected to the paper liquid tank A feed pipe is installed to be received in a papermaking liquid supply tank in communication with each other, thereby forming a crude molding on the lower mold through the supply and discharge of the papermaking liquid; The upper part of the lower mold, the phase is controlled by the drive of the cylinder is made of a structure installed spaced apart from the upper mold for pressing and dehydrating the molded article formed on the lower mold; A pulp molding system of a one-way molding supply structure, characterized in that the primary dehydration by the formation and pressurization of the first molding is continuously implemented. The one-way molding supply structure of claim 1, further comprising a papermaking liquid discharge pipe connected to a point lower than a phase of the lower mold of the papermaking liquid supply tank so that excess papermaking liquid is discharged instantaneously through opening of the discharge pipe. Pulp molding system. According to claim 1, wherein a heater is further provided in the upper mold constituting the first molded part, the upper mold is pressed by the heating and pressurized the molded article formed in the lower mold in a state where the upper mold is heated to 70 ℃ to 120 ℃ by a heater, The pulp forming system of the one-way molding supply structure, characterized in that the dehydration is made. The pulp forming system of claim 1, wherein a discharge conveyor is disposed below the discharge unit, and the completed molded product discharged through the discharge unit is transferred by the discharge conveyor to be discharged to the outside.

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