CN104495014A - Pulp molded tray with composite structure and manufacturing method - Google Patents

Abstract

The present invention relates to the technical field of logistics transportation tools, and discloses a pulp molded pallet with a composite structure. The pulp molded pallet adopts the combination and packaging of a pulp molded body structure, honeycomb paperboard and corrugated paperboard in the structure. Since honeycomb paperboard has the advantages of light weight, low price and high strength, especially its honeycomb structure has a large load-bearing ratio, the composite structure pulp molded pallet described in the present invention can be recycled or completely degraded in nature while improving strength, and has a simple structure. The present invention also provides a method for manufacturing a pulp molded pallet with a composite structure. The manufacturing method uses a simple manufacturing process to package and combine the pulp molded body with the honeycomb paperboard and the corrugated paperboard, thereby obtaining a pulp molded pallet with high load-bearing strength. The manufacturing method has the advantages of simple process, convenient operation, high production efficiency and cost saving.

Description

Pulp molded tray with composite structure and manufacturing method

technical field

The invention relates to the technical field of logistics delivery tools, in particular to a pulp molding tray with a composite structure and a manufacturing method.

Background technique

Pulp molding is a three-dimensional papermaking technology. It uses a special mold to shape a certain shape of paper products on a molding machine. The pulp molding structure is an open three-dimensional space and has a uniform thin-walled structure. Large pulp molded structures have poor strength and rigidity and are easily deformed. Therefore, pulp molding in the market is mainly used as the inner packaging of products, and it is rarely used as a heavy-duty logistics pallet. Therefore, in the logistics industry, wooden pallets or plastic product pallets are more commonly used. The use of wooden pallets needs to cut down a lot of trees, which is easy to damage the natural ecology, while the pallets of plastic products are obtained through petroleum refining. This kind of plastic products is not easy to degrade after use, and a large number of discarded plastics are easy to cause damage to the environment. Therefore, combined with the current The current situation of using pallets in the logistics industry and the shortcomings of existing pulp molding, the inventor has invented a pulp molding pallet with a composite structure and a manufacturing method after repeated tests and demonstrations.

Contents of the invention

The object of the present invention is to address the deficiencies of the prior art and provide a pulp molded tray with a composite structure. The pulp molded tray has the advantages of simple structure and high bearing strength; it also provides a method for manufacturing the composite structure The method of pulp molding tray has the advantages of simple process, convenient operation and high production efficiency.

In order to achieve the above object, a pulp molded tray with a composite structure according to the present invention includes a pulp molded body, the pulp molded body includes a packaging component and several hollow supporting feet arranged under the packaging component, Honeycomb filled cardboard or several layers of corrugated cardboard are arranged inside the supporting feet, honeycomb cardboard is arranged above the supporting feet, and the periphery of the packaging component is bent and formed and covered and connected to the outside of the honeycomb cardboard.

Preferably, the package assembly includes a first assembly, a second assembly, a third assembly and a fourth assembly with the same structure, and the first assembly includes a horizontal support part and a side cladding part connected to the horizontal support part and a top surface encapsulation part connected with the side covering part.

Preferably, an adhesive layer is coated between the honeycomb paperboard and the packaging component.

Preferably, the corrugated cardboard is vertically arranged in the support foot, and the corrugated cardboard is adhered to the inner wall of the support foot.

Preferably, the corrugated cardboard is arranged in a spiral wound structure to fill the inside of the support foot.

Preferably, the honeycomb paperboard includes a bottom paperboard and a top paperboard, and a honeycomb paper core is connected between the bottom paperboard and the top paperboard.

Preferably, the corrugated cardboard includes first cardboard and second cardboard, and corrugated paper is arranged between the first cardboard and the second cardboard.

A method of manufacturing a pulp molded pallet having a composite structure comprising the steps of:

S1, prepare the wet paper blank of the pulp molding body through the slurry suction mold;

S2. Dehydrating and drying the wet paper blank of the pulp molding body through a cold extrusion mold to form a pulp molding body;

S3. Die-cutting and rolling the edge of the pulp molded body to form a packaging component that wraps and seals the side and edge of the honeycomb paperboard;

S4. Cutting the honeycomb paperboard according to a certain size specification so that it can be covered by the pulp molding body;

S5, filling honeycomb cardboard or several corrugated cardboards in the support feet of the pulp molded body;

S6. Coating an adhesive layer on the inner side of the pulp molded body;

S7. Put the cut honeycomb paperboard into the inside of the pulp molded body for bonding, and then wrap the surrounding edges of the honeycomb paperboard with packaging components;

S8, pressurizing, heating, drying and shaping the assembled pulp molding tray.

Preferably, in step S5, a single piece of corrugated cardboard is spirally wound to form a wound structure and fill the inside of the support foot.

Preferably, in step S5, the inner side of the support foot is coated with an adhesive layer, and the corrugated cardboard is closely attached to the inner side of the support foot through the adhesive layer.

Beneficial effects of the present invention: a pulp molded tray with a composite structure of the present invention, the pulp molded tray adopts the combination and packaging of the pulp molded body structure, honeycomb cardboard and corrugated cardboard in the structure, because the honeycomb cardboard has Light weight, low price, high strength, etc., especially its honeycomb structure has a large load-bearing ratio. When the pallet is carrying heavy objects, its honeycomb paperboard can play a better bearing role. It is fragile and easily damaged by external force. Therefore, under the action of the packaging component, it can further form the protection of the honeycomb cardboard, and the structural reinforcement method in the support feet can be honeycomb cardboard or corrugated cardboard, both of which can play a role. The effect of structural reinforcement improves the load-bearing strength of the pulp molded tray; the composite structure pulp molded tray described in the patent of the present invention can improve the strength, and can also be recycled or completely degraded in nature, and the structure is simple. The invention also provides a method for manufacturing a pulp molded tray with a composite structure. The manufacturing method uses a simple manufacturing process to make the pulp molded body package and combine the honeycomb cardboard and corrugated cardboard, so as to obtain a pallet with high bearing strength. The pulp molding tray has the advantages of simple process, convenient operation, high production efficiency and low cost.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural view of the pulp molded body of the present invention.

Fig. 3 is a schematic diagram of another molding structure of the pulp molded body of the present invention.

Fig. 4 is a schematic view of the structure of the pulp molded body of the present invention when it is covered.

Fig. 5 is a schematic structural view of the pulp molded body assembled honeycomb paperboard of the present invention.

Fig. 6 is a schematic diagram of the combined structure of the supporting foot and the corrugated cardboard of the present invention.

Fig. 7 is a schematic diagram of the combined structure of the supporting foot and the honeycomb paperboard of the present invention.

Fig. 8 is a schematic structural view of the honeycomb paperboard of the present invention.

Fig. 9 is a schematic diagram of another supporting foot structure of the pulp molded body of the present invention.

Fig. 10 is a schematic diagram of the combined structure of the cylindrical support foot and the honeycomb paperboard of the present invention.

Fig. 11 is a schematic diagram of the combined structure of the cylindrical support foot and the corrugated cardboard winding of the present invention.

Fig. 12 is a schematic diagram of the combined structure of the trapezoidal support leg and the corrugated cardboard winding of the present invention.

Fig. 13 is a schematic structural view of the corrugated cardboard of the present invention.

Fig. 14 is a flow chart of the manufacturing method of the pulp molded tray of the present invention.

Reference numerals include: pulp molded body--1, encapsulation component--2, first component--21, horizontal support part--211, side cladding part--212, top surface encapsulation part--213, The second component--22, the third component--23, the fourth component--24, the support foot--3, the honeycomb cardboard--4, the bottom cardboard--41, the honeycomb paper core--42, the top cardboard--43 , Corrugated cardboard - 5, first container board - 51, corrugated paper - 52, second container board - 53.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to FIGS. 1 to 13 , a pulp molded tray with a composite structure includes a pulp molded body 1 , and the pulp molded body 1 includes a packaging component 2 and several hollow trays arranged under the packaging component 2 . Supporting foot 3, honeycomb filled cardboard or several layers of corrugated cardboard 5 are arranged inside the supporting foot 3, honeycomb cardboard 4 is arranged above the supporting foot 3, and the surroundings of the packaging component 2 are bent and formed and covered and connected to the Describe the outside of the honeycomb paperboard 4. The pulp molded tray adopts the packaging combination of pulp molded body structure to honeycomb cardboard 4 and corrugated cardboard 5 in the structure, because the honeycomb cardboard 4 has the advantages of light weight, low price, high strength, etc., especially its honeycomb structure has a large The load-bearing ratio, when the pallet is carrying heavy objects, its honeycomb paperboard 4 can play a better load-bearing role, and at the same time, although the overall structure of the honeycomb paperboard 4 has a strong bearing capacity, but the surrounding edges of the honeycomb paperboard 4 It is an incomplete honeycomb structure, relatively fragile, with poor local mechanical capabilities, and is easily damaged by external forces. For example, it is easy to collide with other objects and affect the side structure of the honeycomb. Therefore, under the action of the packaging component 2, it is also Further, the protection of the honeycomb cardboard 4 can be formed, and the structure strengthening method in the support foot 3 can adopt honeycomb filling cardboard or corrugated cardboard 5, both of which can play the role of structural reinforcement, and improve the bearing capacity of the pulp molded tray Intensity; wherein, the honeycomb filled paperboard refers to a load-bearing structure with honeycomb paperboard 4, the only difference is that: when loaded into the support 3, the honeycomb paperboard 4 needs to be cut according to a certain size specification, specifically Said: when adopting the honeycomb filling cardboard, need to cut honeycomb cardboard 4 first, make its size and specification can be packed in the supporting foot 3; Small, you can use the corner cutting waste of corrugated cardboard to fill the interior, so that not only the cutting waste can be reused, but also the strength of the supporting foot 3 can be significantly improved, which greatly saves the cost; in summary As mentioned above, the composite structure pulp molded pallet described in the patent of the present invention can be recycled and reused or completely degraded in nature while improving the strength, and the structure is simple.

In this technical solution, the packaging assembly 2 includes a first assembly 21, a second assembly 22, a third assembly 23, and a fourth assembly 24 with the same structure, and the first assembly 21 includes a horizontal support portion 211, and the The side covering part 212 connected with the horizontal support part 211 and the top surface encapsulation part 213 connected with the side covering part 212 . Specifically, when the honeycomb paperboard 4 is placed on the pulp template body, then four first components 21, second components 22, third components 23 and fourth components 24 with the same structure wrap the honeycomb paperboard 4 Covering, that is, the side covering part 212 covers the four sides of the honeycomb paperboard 4, and then the top surface sealing part 213 is bonded and fixed to the edge of the top surface of the honeycomb paperboard 4 to form a combined tray, which also realizes the honeycomb paperboard. Protection of cardboard 4.

Apparently, under the inspiration of the above-mentioned inventive idea, the packaging component 2 can also be formed directly by concave molding when the pulp molded body 1 is formed (see Fig. 3 for details), and then undergo partial die-cutting for Just cover the top surface of the honeycomb paperboard 4 .

In this technical solution, in order to better bond the honeycomb paperboard 4 and the packaging component 2 further, an adhesive layer is coated between the honeycomb paperboard 4 and the packaging component 2 . In this way, the connection between the honeycomb paperboard 4 and the packaging component 2 is more reliable through the adhesive layer.

Since the strength of corrugated paper in different directions is often different when it is in use, generally, when the corrugated strips of corrugated paper are in a vertical state, the strength that can be tolerated is the largest; in this technical solution, the corrugated cardboard 5 is vertically arranged on the 3, and the corrugated cardboard 5 is glued to the inner wall of the supporting foot 3. When the corrugated cardboard 5 is tightly attached to the inner wall of the supporting foot 3, not only the thickness of the inner wall of the supporting foot 3 can be increased, and the load-bearing strength can be improved, but also the bearing strength of the entire supporting foot 3 is also significantly improved under the action of the corrugated cardboard 5 .

In order to further increase the load-bearing strength of the support foot 3 , the corrugated cardboard 5 is arranged in a spiral winding structure to fill the inside of the support foot 3 . (See Figure 6, Figure 7, Figure 11 and Figure 12 for details) That is to say, the corrugated paper adopts a single piece of corrugated paper, and then according to the internal space structure of the support foot 3, it is threaded along the inner wall of the support foot 3. In this way, the formed winding structure is composed of a single piece of corrugated paper, which bears the longitudinal bearing capacity and has a greater joint stress effect, thereby further improving the strength of the supporting foot 3. Of course , can use multiple pieces of corrugation to form a winding structure at the same time, and its use effect is better.

It needs to be further emphasized that: the supporting feet 3 of the pulp molded tray can adopt the supporting feet 3 of the trapezoidal structure or the supporting feet 3 of the cylindrical structure, and the number of the supporting feet 3 is not limited.

In this technical solution, the honeycomb paperboard 4 includes a bottom paperboard 41 and a top paperboard 43 , and a honeycomb paper core 42 is connected between the bottom paperboard 41 and the top paperboard 43 . Wherein, the bottom cardboard 41 and the top cardboard 43 are both connected to the honeycomb paper core 42 by bonding.

In this technical solution, the corrugated cardboard 5 includes a first cardboard 51 and a second cardboard 53 , and a corrugated cardboard 52 is arranged between the first cardboard 51 and the second cardboard 53 . Wherein, the first cardboard paper 51 and the second cardboard paper 53 are both connected to the corrugated paper 52 by bonding.

Referring to Fig. 3, Fig. 8, Fig. 9, Fig. 13 and Fig. 14, in this embodiment, a method for manufacturing a pulp molded tray with a composite structure is also provided, including the following steps:

S1. Prepare the wet paper blank of the pulp molding body 1 through a slurry suction mold;

S2. Dehydrating and drying the wet paper blank of the pulp molding body 1 through a cold extrusion mold to form the pulp molding body 1;

S3. Die-cut and roll the edge of the pulp molded body 1 to form a packaging component 2 that wraps and seals the side and edge of the honeycomb paperboard; after the pulp is molded, use a die-cutting machine to mold the pulp Die-cut the plane, cut out the corresponding horizontal support part 211, the side cover part 212 connected with the horizontal support part 211 and the top package part 213 connected with the side cover part 212, so as to facilitate the following steps The honeycomb paperboard 4 is wrapped, and the rolling step can further increase the packaging performance of the pulp molded packaging component 2 .

S4. Cut the honeycomb paperboard 4 according to a certain size so that it can be covered by the pulp molded body 1; in this step, the size can be the standard size of the existing pallet, such as 1200mm* 1000mm, or 1200mm*800mm, or other non-standard sizes for different requirements.

S5. Fill the honeycomb paperboard 4 or several layers of pasted corrugated cardboard 5 into the support feet 3 of the pulp molded body 1; it should be emphasized that before using the honeycomb paperboard 4 for filling, the honeycomb paperboard needs to be filled 4 or the corrugated cardboard 5 is cut so that the size of the honeycomb cardboard 4 or the corrugated cardboard 5 is matched with the support foot 3, and can be abutted and bonded with the inner wall of the support foot 3.

S6, coating the inside of the pulp molded body 1 with an adhesive layer;

S7. Put the cut honeycomb paperboard 4 into the inside of the pulp molded body 1 for bonding, and then use the packaging component 2 to wrap the surrounding edges of the honeycomb paperboard 4; specifically: the side covering part 212 The honeycomb paperboard 4 is packaged with the top surface sealing part 213 connected with the side covering part 212 .

S8. Pressurize, heat, dry and shape the assembled pulp molding tray; it should be emphasized that the pressurization and heating and shaping are carried out by placing the pulp molding tray in a drying room at the same time, and pressurizing and heating When finalizing the shape, the pulp molded trays are stacked face to face, with support legs 3 pairs of support legs 3. The pressurized pressure is 45~55kg, the preferred technical solution is 50kg, and the drying temperature is 80oC~90oC. The preferred technical solution is 85 oC, and the drying time is 0.5~1 hour, generally speaking, 0.5 hour is enough.

S9. Finally, the shaping is completed, and the pulp molding tray is taken out.

In the above steps of S1 to S3 and S4, it does not have absolute timing. Obviously, the step of S4 can also be placed before, that is, the honeycomb paperboard 4 is cut first, and then the pulp molding tray is formed. Cutting can be done at the same time as forming the pulp molded tray, which does not make a significant difference.

In the step of S5, if corrugated cardboard 5 is used, the single piece of corrugated cardboard 5 is wound in a spiral shape and forms a winding structure to fill the inside of the support foot 3; it needs to be emphasized that the most It is better to wind according to the internal structure of its supporting foot 3. For example, when the supporting foot 3 is trapezoidal, when it is wound, it will be filled with a trapezoidal spiral structure. When the supporting foot 3 is circular, its rolling When winding, it is directly filled with the structure of a circular helix. The purpose of this is to maximize the fit between the wound structure and the inner wall of the support foot 3, thereby ensuring that the corrugated cardboard 5 can play its greatest role.

Further, in step S5, the inner side of the support foot 3 is coated with an adhesive layer, and the corrugated cardboard 5 is closely attached to the inner side of the support foot 3 through the adhesive layer. Obviously, when the corrugated cardboard 5 is closely attached to the inner wall of the supporting foot 3, not only the strength of the supporting foot 3 can be greatly increased, but also the force of the corrugated paper can be distributed to the supporting foot 3, so that the force is more uniform .

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (10)

1. one kind has the paper-pulp molded pallet of composite structure, comprise paper mould body (1), it is characterized in that: described paper mould body (1) comprises package assembling (2) and is arranged at several hollow feets (3) of described package assembling (2) below, honeycomb cardboard space former or some layers of corrugated board (5) are provided with in described feet (3), described feet (3) top is provided with honeycomb cardboard (4), the surrounding bending and molding of described package assembling (2) and the coated outside being connected to described honeycomb cardboard (4).

2. a kind of paper-pulp molded pallet with composite structure according to claim 1, it is characterized in that: described package assembling (2) comprises identical the first assembly (21) of structure, the second assembly (22), the 3rd assembly (23) and the 4th assembly (24), the top capsulation portion (213) that described first assembly (21) comprises horizontal supporting portion (211), the side covering portion (212) be connected with described horizontal supporting portion (211) and is connected with described side covering portion (212).

3. a kind of paper-pulp molded pallet with composite structure according to claim 1, is characterized in that: be coated with adhesive layer between described honeycomb cardboard (4) and described package assembling (2).

4. a kind of paper-pulp molded pallet with composite structure according to claim 1, is characterized in that: described corrugated board (5) is vertically installed in described feet (3), and described corrugated board (5) pastes the inwall tightly investing feet (3).

5. a kind of paper-pulp molded pallet with composite structure according to claim 4, is characterized in that: it is inner in described feet (3) that described corrugated board (5) is set to spiral winding structure filling.

6. a kind of paper-pulp molded pallet with composite structure according to claim 1, it is characterized in that: described honeycomb cardboard (4) comprises bottom cardboard (41) and top layer cardboard (43), between described bottom cardboard (41) and top layer cardboard (43), be connected with honeycomb paper core (42).

7. a kind of paper-pulp molded pallet with composite structure according to claim 1, it is characterized in that: described corrugated board (5) comprises the first boxboard (51) and the second boxboard (53), between described first boxboard (51) and the second boxboard (53), be provided with corrugated paper (52).

8. manufacture a method as described in claim 1-7 with the paper-pulp molded pallet of composite structure, it is characterized in that: comprise the steps:

S1, prepared the l Water Paper base of paper mould body by midge mould;

S2, to the l Water Paper base of paper mould body through cold extrusion die dehydration and drying and shaping, form paper mould body;

S3, cross cutting, roll extrusion are carried out to the edge of paper mould body, form the package assembling side of honeycomb cardboard and edge being carried out to coated edge sealing;

S4, honeycomb cardboard to be cut by certain dimensions, can be coated by described paper mould body institute;

S5, honeycomb cardboard or some corrugated boards are filled in the feet of described paper mould body;

S6, to the inner side of paper mould body coating adhesive-layer;

S7, the honeycomb cardboard cut is put into paper mould body side bonds, then utilize package assembling to be coated on the edge, surrounding of described honeycomb cardboard;

S8, the paper-pulp molded pallet combined carried out pressurize, heating, drying sizing.

9. the manufacture method with the paper-pulp molded pallet of composite structure according to claim 8, is characterized in that: in the step of S5, is spirally carried out by monolithic corrugated board reeling and forms the inside that winding-structure is filled in described feet.

10. the manufacture method with the paper-pulp molded pallet of composite structure according to claim 8, is characterized in that: in the step of S5, applies adhesive-layer inside described feet, by corrugated board by closely attaching inside adhesive-layer and feet.