KR19990078526A - Compression Heated Molding System of Shock-Absorbing Tray Utilized with Waste Paper - Google Patents

Abstract

It is a device that heat-compresses and molds buffer containers and egg boxes of various small products using waste paper. This is to obtain a high quality buffer container with sufficient strength, smooth appearance and constant size, and to compact the waste paper recycling facility. It consists of three upper molds operated up and down, one lower mold operated up and down in a forming tank with raw material pulp, and two lower molds operated left and right. Among the upper and lower molds, except for the lower mold in the forming tank, the other upper and lower molds have a heating body built therein, and all the upper and lower molds can apply a vacuum force and air pressure to the mold by a vacuum apparatus and a pneumatic apparatus. The raw material pulp is sucked by vacuum force in water and stuck to it. Then, it is heated and compressed in the air, removed by air pressure, and adsorbed to the counterpart mold by vacuum force. The lower mold to be fed to the left and right is subjected to heat compression molding four times in succession one molded body while feeding and feeding the molded body to the three upper molds.

Description

Compression Heated Molding System of Shock-Absorbing Tray Utilized with Waste Paper}

The present invention relates to an apparatus for molding a container such as a buffer container, an egg box, etc., which enters a packaging box of various small products using waste paper, and in particular, while conveying the raw material pulp from which the waste paper is decomposed in multiple stages by vacuum force and air pressure. The present invention relates to an apparatus for continuous heat molding.

In the conventional regeneration of the buffer container using waste paper, an alkylene oxide adduct mixture or poly in a defrosting machine is subjected to a paper decomposition process in which paper is decomposed in water by a pulper to form a rich liquid raw pulp. A deinking agent, such as an oxyalkylene ester, is introduced to remove the ink in the waste paper. The raw material pulp that has been defrosted is subjected to a mixing process in which various chemicals such as potato starch as a binder are added and mixed. Thereafter, after a molding step of molding into a predetermined container by a molding machine, and finally, a drying step of hot air drying by a dryer.

Conventional molding machine used in the molding process in the above process is disclosed in Korean Utility Model Publication No. 95-4745 and Korean Patent Publication No. 98-138608. This molding machine takes a kind of wet direct molding method, and the molded body is dried in a separate dryer. The idea of the former is that the upper mold and the lower mold, which water can fall out of the mold, are molded while being interlocked with each other. When the pulp is poured into the lower mold and compressed into the upper mold, a molded product such as a pallet is obtained. By drying. The latter invention is different from the design of the former in that the upper and lower molds are pressed up and down with each other in the mold.

The molded article obtained by the above-mentioned prior art is about 70% water content, so drying is performed through a separate drying device. However, no matter how high the molding strength, the outer surface becomes rough when hot air is applied during the drying process. In addition, in the drying process, the molded body has a shrinkage of about 2 to 3 mm per 100 mm, so that the size of the container changes, and the deformation is accompanied by warpage.

According to the use of the buffer container to be obtained according to the present invention, high-quality electronic products or products such as compact discs, glass bottles, toner cartridges, semiconductor memory cards, cosmetic bottles, cassette players, compact disc players, mobile phones, cameras, artificial dialysis machines, etc. Mostly used in the field. These high quality small product packaging buffers must be precise in size, rigid and require a smooth appearance. However, the buffer containers according to the prior arts are not precise in size due to post-deformation due to drying, and the outer surface is rough due to swelling during moisture evaporation. In addition, during the transportation process, the swelling may become dusty due to friction or impact with the contents, which may cause an obstacle to the operation of the electronic product.

An object of the present invention is to provide a molding apparatus having a sufficient strength, smooth appearance and constant size to obtain a buffer container for packaging high quality small products. Another object of the present invention is to reduce the size of the facility required for waste paper regeneration, by achieving a series of processes from molding to drying by one molding system.

1 is a device configuration and piping and pneumatic circuit configuration of the present invention.

2 is a longitudinal cross-sectional view of a first upper and lower type (first upper and lower type) of the present invention.

3A-3K are flowcharts of the overall system operation of the present invention.

In order to achieve the above object, the present invention comprises three upper molds operated up and down, one lower mold operated up and down in a forming tank with raw material pulp, and two lower molds operated left and right. Among the upper and lower molds, except for the lower mold in the forming tank, the other upper and lower molds have a heating body built therein, and all the upper and lower molds can apply a vacuum force and air pressure to the mold by a vacuum apparatus and a pneumatic apparatus.

Specifically, the forming tank is configured to supply the raw material pulp decomposed waste paper so that its amount can overflow. The first lower mold is operated up and down by a hydraulic cylinder in the forming tank, and is configured to adsorb the raw material pulp to the mesh covered with the mold by vacuum force, and to remove the molded body by air pressure after compression molding. The first upper mold is formed by heat compression molding the absorbed raw material pulp of the first lower mold together with the first lower mold according to the up and down operation of the hydraulic cylinder, and the half stroke is controlled by the air cylinder after the heating compression molding, Is adsorbed by vacuum force and removed by air pressure. The second phase and the third phase are the strokes corresponding to the half stroke of the first phase, and are operated up and down simultaneously with the first phase by the hydraulic cylinder, heat compression molding the molded body, and adsorb the molded body by the vacuum force during the lifting and lowering. It is configured to remove by air pressure. And the second lower mold and the third lower mold are operated left and right by a hydraulic cylinder to transfer the molded body held by the first upper mold to the second upper mold, and the molded body held by the second upper mold to the third upper mold, respectively. It is configured to heat compression molding, to adsorb by vacuum force at the time of raising and lowering, and to remove by air pressure.

According to the above configuration, the raw material pulp is sucked with vacuum force in water to stick to a first thickness in a certain thickness, and then heated and compressed to the first upper mold in air, and then in the first lower mold by air pressure. At the same time as being removed, the first phase is adsorbed by vacuum force. The second lower mold is moved under the first phase mold to heat-compress the molded body, and the second compact and the third phase mold are sequentially moved under the second phase and the third phase mold. A smooth molded body of strong and precise dimensions is obtained.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

1 is a block diagram showing a device configuration, a piping and a pneumatic circuit, and FIG. 2 is a longitudinal cross-sectional view of a first vertical type.

The forming tank 1 is a tank in which the raw material pulp supplied from the supply tank A is stored, and is installed so that the first lower mold 4a can be operated up and down. The raw material pulp overflowing when the first lower die 4a rises is allowed to overflow into the supply tank A. The raw material pulp is decomposed waste paper. In the pulp, wax, degassing agent, aluminum sulfate, catalyst, epomin, etc., is added to the water, and the concentration of the raw material pulp is adjusted to 8-10%. When the concentration is 2 to 3% in the supply tank (A) is to be supplied to the forming tank (1).

The first lower die 4a is operated up and down in the forming tank 1 by the hydraulic cylinder 5a. A plurality of vent holes 6 are drilled in the mold of the first lower die 4a, and are connected such that the vacuum force of the vacuum apparatus B and the air pressure of the pneumatic apparatus C act inside. In addition, a 50 mesh metal mesh 7 is covered on the outer surface of the mold of the first lower die 4a, and a solenoid valve V1 is provided between the vacuum device B. The vacuum degree acting on the mold when the solenoid valve V1 is opened is 600 mmHg. When the metal mesh 7 is 50 mesh or more, the raw material pulp P is not adsorbed on the surface of the mesh, and when the metal mesh 7 is less than 50 mesh, the vacuum degree should be increased. Between the first lower die 4a and the solenoid valve V1, an electromagnetic one-way switching valve V7 connected to the pneumatic device C is provided.

The first upper die 4b is operated up and down by a long stroke by the hydraulic cylinder 5b. The heating body H1 is provided inside the first upper die 4b, and the raw material pulp P adsorbed to the metal mesh 7 together with the first lower die 4a or the second lower die 4e is heated. Compression molding is used to make a molded article first. The heating temperature applied to the molded body is 250 ° C. A plurality of vent holes 7a are drilled in the mold of the first upper die 4b and are connected to the vacuum force of the vacuum apparatus B and the air pressure of the pneumatic apparatus C. The solenoid valve V2 is installed between the vacuum apparatus B and the first upper mold 4b, and the electromagnetic one-way switching valve connected to the pneumatic device c between the first upper mold 4b and the solenoid valve V2. V8 is provided.

The second upper die 4c is operated up and down in a stroke corresponding to 1/2 of the first upper die 4b by the hydraulic cylinder 5c. The heating body H2 is provided inside this 2nd upper mold | type 4c, and the compression molded object is heat-compression-molded with the 2nd lower mold | type 4e or the 3rd lower mold | type 4f. The heating temperature applied to the molded body is 250 ° C. A plurality of vent holes are drilled in the mold of the second upper mold 4c, and the vacuum force of the vacuum apparatus B and the air pressure of the pneumatic apparatus C are connected to the mold. The solenoid valve V3 is provided between the vacuum apparatus B and the second upper mold 4c, and the electromagnetic one-way switching valve is connected to the pneumatic device C between the second upper mold 4c and the solenoid valve V3. (V9) is installed.

The third upper die 4d is operated up and down in a stroke corresponding to 1/2 of the first upper die 4b by the hydraulic cylinder 5d. The heating body H3 is provided inside this 3rd upper mold 4d, and the compression molded object is heat-compressed with the 3rd lower mold 4f. The heating temperature applied to the molded body is 250 ° C. A plurality of vent holes are drilled in the mold of the third upper mold 4d, and the vacuum force of the vacuum apparatus B and the air pressure of the pneumatic apparatus C are connected to the mold. The solenoid valve V4 is provided between the vacuum apparatus B and the 3rd phase type 4d, and the electromagnetic one-way switching valve connected with the pneumatic device C between the 3rd phase type 4d and the solenoid valve V4. V10 is provided.

The second lower mold 4e and the third lower mold 4f are integrated with each other by the base 8, and the first upper mold 4b and the third upper mold are formed by hydraulic cylinders 5e installed on both sides in the transverse direction. It is operated left and right with a stroke of the center distance of (4d). Heaters H4 and H5 are provided in the second lower mold 4e and the third lower mold 4f, respectively, and the second lower mold 4e is the first upper mold 4b or the second upper mold 4c. And 3rd lower mold | type 4f heat-compress a molded object with 2nd upper mold | type 4c or 3rd upper mold | type 4d, respectively. The heating temperature applied to each molded object is 250 degreeC. A plurality of vent holes are drilled in the molds of the second lower mold 4e and the third lower mold 4f, and the vacuum force of the vacuum apparatus B and the air pressure of the pneumatic apparatus C are connected to the mold. The solenoid valves V5 and V6 are provided between the vacuum device B and the second lower mold 4e, and between the vacuum device B and the third lower mold 4f, respectively, and the second lower mold 4e and the solenoid valve ( V5), between the third lower mold 4f and the solenoid valve V6 are provided with electromagnetic one-way selector valves V11 and V12 connected to the pneumatic device C, respectively.

The half stroke of the hydraulic cylinder 5b on the first upper die 4b is controlled by the air cylinder 9. The control, that is, the role of restraining the first upper die 4b in a half stroke depends on the operation of the electromagnetic two-way switching valve V13 provided between the air cylinder 9 and the pneumatic device C. When the air cylinder 9 restrains the hydraulic cylinder 5b in a half stroke, the first lower mold 4a and the first lower mold 4a are pressed again to compress the new raw material pulp after adsorbing the molded body on the first lower mold 4a. Until it works together. The check valves V14 and V15 are for pressure control.

Since the solenoid valves V1 to V6 and the solenoid one-way switching valves V7 to V12 are installed to correspond to each other on each mold, the solenoid valves V7 to V12 are opened when the solenoid valves V1 to V6 are opened. When the solenoid one-way selector valves V7 to V12 are opened, the solenoid valves V1 to V6 are closed. For example, in the case of the first upper die 4b, the solenoid valve V2 should be opened when a vacuum force is applied to the mold in order to adsorb the molded body. In this case, the solenoid one-way switching valve V8 should be closed at the same time. On the contrary, when the air pressure is applied to the mold in order to remove the molded body from the first upper mold 4b, the electromagnetic one-way switching valve V8 should be opened. In this case, the solenoid valve V2 should be closed at the same time. In the following description of the operation procedure described below, only elements that are opened will be described for convenience, and elements that are relatively closed will not be described separately.

3A to 3K show an operation sequence until one molded body is completed. Hereinafter, the operation sequence will be briefly described in the order of FIGS. 3A to 3K with reference to FIG. 1.

In Fig. 3A, the raw material pulp in the forming tank 1 is adsorbed on the mold surface of the first lower die 4a with a predetermined thickness as P by the vacuum force of the vacuum apparatus B. At this time, the solenoid valve V1 and the electromagnetic one-way switching valve V7 are open, and are closed again when the first lower mold 4a is raised.

In Fig. 3B, the first to third phase molds 4b to 4d come down at the same time, and the first lower mold 4a goes up. However, the first upper die 4b comes down to the previous stroke. As a result, the raw material pulp adsorbed on the first lower mold 4a is primarily subjected to heat compression molding. When the molding is completed, the electromagnetic one-way switching valve V7 is opened, and the pneumatic pressure of the pneumatic device C is applied, and the molded body attached to the first lower mold 4a falls, and at the same time, the solenoid valve V2 is opened to open the vacuum device B. Of the molded article is adsorbed to the first upper die 4b.

In Fig. 3C, the first to third upper molds 4b to 4d are raised at the same time, and the second lower mold 4e and the third lower mold 4f are moved to the right at the same time so that the second lower mold 4e has the molded body. (4b) is located below. However, the first upper die 4b goes up to the previous stroke.

In Fig. 3D, the first to third phase dies 4b to 4d come down at the same time. However, the first upper die 4b comes down to the half stroke. At this time, the molded body is again heated compression molded between the first upper mold 4b and the second lower mold 4e. When the molding is completed, the electromagnetic one-way switching valve V8 is opened and the pneumatic pressure of the pneumatic device C is applied to the first upper mold 4b. Since the molded object attached to (4b) falls, and at the same time, the solenoid valve V5 is opened and the vacuum force of the vacuum apparatus B is applied, the molded object is attracted to the 2nd lower mold | type 4e.

In Fig. 3E, the first to third phase molds 4b to 4d are raised at the same time, and the second lower mold 4e and the third lower mold 4f are moved to the left at the same time so that the second lower mold 4e having the molded body is the second upper mold. (4c) is located below.

In Fig. 3F, the first to third phase molds 4b to 4d come down at the same time. At this time, the molded body is heated and compressed again between the second upper mold 4c and the second lower mold 4e. When the molding is completed, the electromagnetic one-way switching valve V11 is opened and the air pressure of the pneumatic device C is applied to the second lower mold 4c. Since the molded object attached to 4e falls, and at the same time, the solenoid valve V3 is opened and the vacuum force of the vacuum apparatus B is applied, the molded object is attracted to the 2nd upper mold | type 4c. In addition, the first upper mold 4b and the first lower mold 4a perform operations as shown in FIG. 3B to form another molded body.

Hereinafter, only the process of molding the first molded body described above will be described, and the molding process for another molded body and another molded body thereafter will be omitted for the sake of understanding.

In Fig. 3G, the first to third upper molds 4b to 4d are raised at the same time, the second lower mold 4e and the third lower mold 4f are moved to the right at the same time so that the third lower mold 4f has the molded body. (4c) is located below.

In Fig. 3H, the first to third phase molds 4b to 4d descend simultaneously. At this time, the molded body is heated and compressed again between the second upper mold 4c and the third lower mold 4f. When the molding is completed, the electromagnetic one-way switching valve V9 is opened and the air pressure of the pneumatic device C is applied to the second upper mold 4c. Since the molded object attached to 4c falls, and at the same time, the solenoid valve V6 is opened and the vacuum force of the vacuum apparatus B is applied, the molded object is attracted to the 3rd lower mold | type 4f.

In Fig. 3I, the first to third phase molds 4b to 4d are raised at the same time, and the second lower mold 4e and the third lower mold 4f are moved to the left at the same time so that the third lower mold 4f having the molded body is the third upper mold. (4d) is located below.

In Fig. 3J, the first to third phase dies 4b to 4d come down at the same time. At this time, the molded body is heated and compression-molded again between the third upper mold 4d and the third lower mold 4f. When the molding is completed, the electromagnetic one-way switching valve V12 is opened to apply the air pressure of the pneumatic device C to the third lower mold. At the same time, the molded body attached to 4f falls, and at the same time, the solenoid valve V4 is opened to apply the vacuum force of the vacuum apparatus B, so that the molded body is adsorbed to the third phase mold 4d.

In Fig. 3K, the first to third phase molds 4b to 4d are raised at the same time, the second lower mold 4e and the third lower mold 4f are simultaneously moved to the right, and the electromagnetic one-way switching valve V10 is opened to open the pneumatic device ( The air pressure of C) is applied and the molded body is separated from the third phase mold 4d to obtain a completely dried molded body.

In the present invention as described above, the present invention achieves a smooth outer surface because a single molded product is continuously molded four times by three sets of molds and is completely heat-dried in the mold, thereby obtaining a precise size without post deformation. , Strength also increases. The molded article obtained by such a molding apparatus is suitable for cushioning and beautifully packing the contents of high-quality small products, and does not cause swelling or dust due to friction or impact of the contents during transportation, and thus particularly impairs the operation of precision electronic products. Does not cause. Since the molding apparatus continuously performs the process of forming simultaneously with drying, there is no need for a facility for drying with a dryer while riding a long conveyor after wet molding as in the prior art. Therefore, the waste paper recycling facility can be made compact and can be installed and operated even in a relatively small space.

Claims (1)

A forming tank 1 to which raw material pulp obtained by decomposing waste paper is supplied; In the forming tank (1) is operated up and down by the hydraulic cylinder (5a), the first pulp to adsorb the raw material pulp to the metal mesh (7) covered with the mold by vacuum force, and to remove the molded body by air pressure after compression molding Lower mold 4a; According to the up and down operation of the hydraulic cylinder 5b, the adsorbed raw material pulp of the first lower mold 4a is heated and compression-molded together with the first lower mold 4a, and then heated to the air cylinder 9 after molding. A semi-stroke is controlled by the first upper die 4b which sucks the molded body under vacuum force and removes it by air pressure during the ascending and descending; The hydraulic cylinders 5c and 5d operate up and down simultaneously with the first upper die 4b in a stroke corresponding to the half stroke of the first upper die 4b. A second phase die 4c and a third phase die 4d, which are sucked by a vacuum force and removed by air pressure; And the molded object which the said 1st upper mold 4b hold | maintains by the hydraulic cylinder 5e, and conveys the molded object which the said 1st upper mold 4b hold | maintains to the said 2nd upper mold 4c, and the molded object which the 2nd upper mold 4c hold | maintains is the said 3rd upper mold (4d), a compression vessel heating using waste paper, consisting of a second lower mold (4e) and a third lower mold (4f), each of which is subjected to heat compression molding, adsorbed by a vacuum force during lifting and lowering, and removed by air pressure. Compression molding apparatus.