A shaping equipment and method for manufacturing paper-plastic products

Abstract

This invention discloses a shaping device for manufacturing paper-plastic products, including a support, an adjustment mechanism, an upper mold, and a lower mold. The support is equipped with an adjustment mechanism, within which the upper mold and lower mold are respectively arranged. The lower mold has a cavity, and the upper mold has a cavity column adapted to the cavity. An upper working frame is arranged above the upper mold, and a lower working frame is arranged below the lower mold. Both the upper and lower working frames are mounted on the support. A heating element is arranged in the upper working frame for heating the cavity column of the upper mold, and a suction filter is arranged in the lower working frame for absorbing moisture from the mold during pulp shaping. This invention can greatly accelerate the shaping efficiency of paper-plastic products and achieve the effect of automatic demolding and material discharge from the paper-plastic mold.

Description

Technical Field

[0001] This invention relates to the field of paper-plastic technology, and specifically to a shaping equipment and method for manufacturing paper-plastic products. Background Technology

[0002] Chinese patent CN107604769B discloses a paper-plastic manufacturing process, including the following steps:

[0003] Step 1: Raw material preparation; Step 2: Pulping; Step 3: Pulp loading; Step 4: Pulp mixing; Step 6: Product molding. This type of paper-plastic product takes approximately 10 days from mold design and mold opening to sample production. It has a short production cycle and low cost, and offers the following advantages: Raw materials are widely available, belonging to the field of comprehensive waste utilization, aligning with environmentally friendly industrial concepts. No wastewater or waste gas is discharged during the production process, making it harmless to the environment. Furthermore, waste paper-plastic products can be recycled and molded again; even if discarded in the natural environment, they can easily decompose into organic matter, making them completely environmentally friendly products. In addition, compared to foamed plastics, this type of paper-plastic product has advantages such as smaller footprint, stackability, and convenient logistics.

[0004] In the existing technology, during the shaping process of paper-plastic products, the upper and lower molds are usually closed and pressure is used for plasticization. This method has problems such as poor shaping effect, long time, and the need to take it out for heating and drying after shaping, which will also lead to product deformation and make the process relatively complicated. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned above in the background art, and to provide a shaping equipment and method for manufacturing paper-plastic products.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A shaping device for manufacturing paper-plastic products includes a support frame, an adjustment mechanism, an upper mold, and a lower mold;

[0008] The support is equipped with an adjustment mechanism, which contains an upper mold and a lower mold. The lower mold has a cavity, and the upper mold has a cavity column that matches the cavity.

[0009] An upper working frame is provided above the upper mold, and a lower working frame is provided below the lower mold. Both the upper and lower working frames are mounted on a bracket. A heating element is provided inside the upper working frame to heat the cavity column of the upper mold, and a suction filter is provided inside the lower working frame to absorb moisture from the mold during pulp setting.

[0010] As a further embodiment of the present invention: the heating element is: a first cavity is provided in the upper working frame, a flow divider is provided in the first cavity, an air pipe is provided at the top of the flow divider, and a connecting pipe is provided at the bottom of the flow divider.

[0011] As a further aspect of the present invention: the upper mold is provided with mounting holes that are compatible with the cavity pillar, the cavity pillar includes a pillar body and a heat-conducting plate, and the heat-conducting plate is provided at the bottom of the cavity pillar.

[0012] As a further aspect of the present invention: the heat-conducting plate includes a horizontal plate and multiple vertical plates, the horizontal plate being installed at the bottom of the cavity column, and the vertical plates being embedded in the bottom of the cavity column.

[0013] As a further aspect of the present invention: the filter element is provided with a through hole at the top of the lower working frame, a negative pressure chamber at the bottom of the lower working frame, a drain outlet at the bottom of the lower working frame, and a vacuum hole on one side of the lower working frame for connection to a negative pressure pump; the lower mold is provided with multiple connecting holes at equal intervals, and the connecting holes are adapted to the through holes of the lower working frame.

[0014] As a further aspect of the present invention: the first connecting wheel and the second connecting wheel of the adjustment mechanism have the same diameter, and the first connecting wheel and the second connecting wheel are connected by a connecting shaft. A limit wheel is provided at the bottom of the bracket, the first connecting wheel and the second connecting wheel are located on the limit wheel, a limit sleeve is sleeved on the second connecting wheel, and the limit sleeve is installed on the bracket.

[0015] As a further aspect of the present invention: the upper mold and the upper working frame are in contact with a first arc-shaped surface, and the lower mold and the lower working frame are in contact with a second arc-shaped surface, wherein the first arc-shaped surface and the second arc-shaped surface are located on concentric circles.

[0016] As a further aspect of the present invention: the upper mold moving parts are arranged on both sides of the lower mold, and the upper mold moving parts are operated by cylinders to drive the upper mold to move up and down.

[0017] A method for operating a shaping device for manufacturing paper-plastic products includes the following steps:

[0018] Step 1: Pour the well-stirred pulp into the cavity of the lower mold. At the same time, inject a heat source into the cavity of the column to heat the heat-conducting plate, thereby heating the column cavity.

[0019] Step 2: Control the upper mold to move downwards, so that the cavity pillar enters the cavity of the lower mold, forming a hot-pressed mold of the pulp in the cavity. At the same time, the negative pressure cavity is in a negative pressure state, and water is introduced into the negative pressure cavity along the connecting hole and the through hole.

[0020] Step 3: After the shaping is completed, rotate the first connecting wheel and the second connecting wheel 180° so that the lower mold rotates to the top. Then, introduce the heat source into the connecting hole of the lower mold through the air pipe, thereby blowing the shaped paper-plastic mold out of the cavity.

[0021] The beneficial effects of this invention are:

[0022] (1) The present invention achieves hot pressing of the pulp in the cavity by setting a heatable upper working frame on the upper mold, and sets a suction and filtering lower working frame on the lower mold to accelerate the loss of pulp moisture. The two work together to greatly accelerate the efficiency of paper-plastic product shaping.

[0023] (2) On the basis of the above, an adjustment mechanism is added to achieve the effect of automatic demolding and material discharge of paper-plastic mold; and the demolding does not use rigid clamps for clamping, so the demolding effect can be achieved without damage. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the connection relationship between the upper and lower molds of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection relationship between the upper mold and the upper working frame of the present invention;

[0029] Figure 5 This is a structural diagram illustrating the connection relationship between the lower mold and the lower working frame of the present invention.

[0030] In the diagram: 1. Bracket; 2. Adjustment mechanism; 3. Upper mold; 4. Upper working frame; 5. Cavity column; 6. Lower mold; 7. Lower working frame; 8. Drive gear; 9. Limiting sleeve; 10. Driven gear; 11. First connecting wheel; 12. Second connecting wheel; 13. Limiting wheel; 14. Limiting rod; 15. Mounting plate; 16. Cylinder; 17. First cavity; 18. Air pipe; 19. Diverter plate; 20. Connecting pipe; 21. Cavity; 22. Connecting hole; 23. Through hole; 24. Negative pressure chamber; 25. Column; 26. Heat-conducting plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Please see Figure 1 , Figure 4 and Figure 5 As shown, the present invention is a shaping device for manufacturing paper-plastic products, including a support 1, an adjustment mechanism 2, an upper mold 3, and a lower mold 6;

[0034] The support 1 is provided with an adjustment mechanism 2, and an upper mold 3 and a lower mold 6 are respectively provided in the adjustment mechanism 2. The upper mold 3 is located above the lower mold 6, and the upper mold 3 can move and close to the lower mold 6 to form the pulp under pressure. The lower mold 6 is provided with a cavity 21, and the upper mold 3 is provided with a cavity column 5 that is adapted to the cavity 21.

[0035] The upper working frame 4 is provided above the upper mold 3, and the lower working frame 7 is provided below the lower mold 6. Both the upper working frame 4 and the lower working frame 7 are mounted on the bracket 1. A heating element is provided inside the upper working frame 4, which is used to heat the cavity column 5 of the upper mold 3. A filter element is provided inside the lower working frame 7, which is used to absorb the moisture on the mold when the pulp is set.

[0036] The heating element includes a first cavity 17, an air pipe 18, a flow divider 19, and a connecting pipe 20. The first cavity 17 is provided in the upper working frame 4, the flow divider 19 is provided in the first cavity 17, the air pipe 18 is provided at the top of the flow divider 19, and the connecting pipe 20 is provided at the bottom of the flow divider 19.

[0037] The upper mold 3 is provided with mounting holes that are compatible with the cavity pillar 5. The cavity pillar 5 includes a pillar 25 and a heat-conducting plate 26. A heating cavity is provided in the upper part of the interior of the pillar 25, and a heat-conducting plate 26 is provided in the lower part of the interior of the cavity pillar 5. The heat-conducting plate 26 includes a horizontal plate and multiple vertical plates. The horizontal plate is installed at the bottom of the cavity pillar 5, and the vertical plates are embedded in the bottom of the cavity pillar 5.

[0038] The suction filter includes a through hole 23 and a negative pressure chamber 24. The through hole 23 is provided on the upper part of the lower working frame 7, the negative pressure chamber 24 is provided on the bottom of the lower working frame 7, the drain port is provided on the bottom of the lower working frame 7, and a vacuum hole is provided on one side of the lower working frame 7 for connection to a negative pressure pump. The lower mold 6 is provided with multiple connecting holes 22 at equal intervals, and the connecting holes 22 are adapted to the through holes 23 of the lower working frame 7.

[0039] During operation, the well-stirred pulp is injected into the cavity 21 of the lower mold 6. At the same time, the heat source is controlled to be input into the diversion plate 19 through the air pipe 18 and diverted into the cavity of the column 25 through the connecting pipe 20 to heat the heat conduction plate 26. Then the heat in the heat conduction plate 26 exchanges heat with the bottom of the column 25, thereby rapidly heating the bottom of the cavity column 5.

[0040] Then, the upper mold 3 is controlled to move downward, so that the cavity column 5 enters the cavity 21 of the lower mold 6. Due to the high temperature of the cavity column 5, the pulp in the cavity 21 is thermo-pressed, thereby improving the efficiency of the shaping process in the paper-plastic product. At the same time, the negative pressure pump is started to put the negative pressure chamber 24 into a negative pressure state. During the thermo-pressing process, the pulp, under the action of negative pressure, introduces water into the negative pressure chamber 24 along the connecting hole 22 and the through hole 23. The negative pressure chamber 24 will play a storage role. The lower working frame 7 with the negative pressure structure will accelerate the loss of pulp water, thereby further accelerating the shaping efficiency of the paper-plastic product.

[0041] Example 2

[0042] Please see Figure 2 and Figure 3 As shown, the adjustment mechanism 2 includes a limiting sleeve 9, a first connecting wheel 11, and a second connecting wheel 12; the first connecting wheel 11 and the second connecting wheel 12 have the same diameter and are connected by a connecting shaft. A limiting wheel 13 is provided at the bottom of the bracket 1. The first connecting wheel 11 and the second connecting wheel 12 are located on the limiting wheel 13. The limiting sleeve 9 is sleeved on the second connecting wheel 12 and is installed on the bracket 1.

[0043] A driving component is provided on the first connecting wheel 11 to control the rotation of the first connecting wheel 11, and then drive the second connecting wheel 12 to rotate through the connecting shaft. The driving component includes a driving gear 8 and a driven gear 10. The driving gear 8 is connected to the output end of the drive motor, the drive motor is mounted on the bracket 1, and the driving gear 8 and the driven gear 10 are meshed. The driven gear 10 is sleeved on the first connecting wheel 11.

[0044] Matching the adjustment mechanism 2 is: the upper mold 3 and the upper working frame 4 are in contact with the first arc surface, and the lower mold 6 and the lower working frame 7 are in contact with the second arc surface. The first arc surface and the second arc surface are located on concentric circles. The design of the arc surface makes it easy for the upper mold 3 and the lower mold 6 to rotate.

[0045] The upper mold moving parts are located on both sides of the lower mold 6. These upper mold moving parts include limiting wheels 13, limiting rods 14, and mounting plates 15. Two limiting rods 14 are arranged side-by-side. The bottom end of each limiting rod 14 is mounted on the side of the lower mold 6, and the top end of each limiting rod 14 passes through the mounting plate 15 and is slidably connected to it. The mounting plate 15 is located on the side wall of the upper mold 3. A cylinder 16 is located between the two limiting rods 14, and the output end of the cylinder 16 is connected to the mounting plate 15. Therefore, by controlling the operation of the cylinder 16, the mounting plate 15 is moved along the limiting rods 14, causing the upper mold 3 to move up and down along the limiting rods 14, thus achieving the opening and closing operation with the lower mold 6 for hot pressing and shaping of the paper-plastic mixture. The position design of this upper mold moving part is offset from the upper working frame 4 and the lower working frame 7, achieving simple and efficient opening and closing of the mold while enabling rapid hot pressing and shaping and facilitating material discharge.

[0046] During operation, after the shaping is completed, the drive motor is activated, driving the active gear 8 to rotate. The active gear 8, through meshing, drives the driven gear 10 to rotate, causing the first connecting wheel 11 and the second connecting wheel 12 to rotate as well. The first connecting wheel 11 and the second connecting wheel 12 are controlled to rotate 180°, causing the lower mold 6 to rotate to the top. Then, a heat source is input into the diverter plate 19 through the air pipe 18, and the heat is diverted from the connecting pipe 20 into the connecting hole 22 of the lower mold 6, thereby blowing the shaped paper-plastic mold out of the cavity 21. Therefore, the paper-plastic mold automatically demolds under its own weight and the force of the wind. Thus, by adding the adjustment mechanism 2, the effect of automatic demolding and material discharge of the paper-plastic mold can be achieved. Moreover, this demolding does not require the use of rigid clamps, achieving a non-destructive demolding effect.

[0047] Example 3

[0048] A method for operating a shaping device for manufacturing paper-plastic products includes the following steps:

[0049] Step 1: Inject the well-stirred pulp into the cavity 21 of the lower mold 6. At the same time, control the input of heat source into the diversion plate 19 through the air pipe 18, and divert it into the cavity of the column 25 through the connecting pipe 20 to heat the heat conduction plate 26. Then, the heat in the heat conduction plate 26 exchanges heat with the bottom of the column 25, thereby rapidly heating the bottom of the cavity column 5.

[0050] Step 2: Control the upper mold 3 to move downwards, so that the cavity column 5 enters the cavity 21 of the lower mold 6. Because the cavity column 5 is at a high temperature, it forms a hot-pressed molding of the pulp in the cavity 21, thereby improving the efficiency of the shaping process in the paper-plastic product. At the same time, start the negative pressure pump to put the negative pressure chamber 24 into a negative pressure state, so that during the hot pressing process, the pulp will be introduced into the negative pressure chamber 24 along the connecting hole 22 and the through hole 23 under the action of negative pressure.

[0051] Step 3: After the shaping is completed, control the drive motor to work and drive the drive gear 8 to rotate. The drive gear 8 drives the driven gear 10 to rotate through meshing, so that the first connecting wheel 11 and the second connecting wheel 12 follow the rotation and are controlled to rotate 180°, so that the lower mold 6 rotates to the top. Then, the heat source is input into the diversion plate 19 through the air pipe 18 and diverted into the connecting hole 22 of the lower mold 6 through the connecting pipe 20, thereby blowing the shaped paper-plastic mold in the cavity 21 off.

[0052] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A shaping device for manufacturing paper-plastic products, characterized in that, It includes a support (1), an adjustment mechanism (2), an upper mold (3), and a lower mold (6); An adjustment mechanism (2) is provided on the bracket (1). An upper mold (3) and a lower mold (6) are respectively provided in the adjustment mechanism (2). A cavity (21) is provided on the lower mold (6). A cavity column (5) adapted to the cavity (21) is provided on the upper mold (3). The cavity column (5) includes a column body (25) and a heat-conducting plate (26). An upper working frame (4) is provided above the upper mold (3), and a lower working frame (7) is provided below the lower mold (6). Both the upper working frame (4) and the lower working frame (7) are mounted on the bracket (1). A heating element is provided inside the upper working frame (4) to heat the cavity column (5) of the upper mold (3). A filter element is provided inside the lower working frame (7) to absorb moisture from the mold during pulp setting. The suction filter is as follows: a through hole (23) is provided on the upper part of the lower working frame (7), a negative pressure chamber (24) is provided at the bottom of the lower working frame (7), a drain port is provided at the bottom of the lower working frame (7), and a vacuum hole is provided on one side of the lower working frame (7) to be connected to the negative pressure pump; multiple connecting holes (22) are provided at equal intervals on the lower mold (6), and the connecting holes (22) are adapted to the through holes (23) of the lower working frame (7); The first connecting wheel (11) and the second connecting wheel (12) of the adjustment mechanism (2) have the same diameter and are connected by a connecting shaft. The bottom of the bracket (1) is provided with a limiting wheel (13). The first connecting wheel (11) and the second connecting wheel (12) are located on the limiting wheel (13). A limiting sleeve (9) is fitted on the second connecting wheel (12). The limiting sleeve (9) is installed on the bracket (1). A driving component is provided on the first connecting wheel (11) to control the rotation of the first connecting wheel (11). Then, the second connecting wheel (12) will also be driven to rotate through the connecting shaft. The driving component includes a driving gear (8) and a driven gear (10). The driving gear (8) is connected to the output end of the drive motor. The drive motor is installed on the bracket (1). The driving gear (8) is meshed with the driven gear (10). The driven gear (10) is fitted on the first connecting wheel (11). The upper mold (3) and the upper working frame (4) are in contact with each other on the first arc surface, and the lower mold (6) and the lower working frame (7) are in contact with each other on the second arc surface. The first arc surface and the second arc surface are located on concentric circles. The heating element is: a first cavity (17) is provided in the upper working frame (4), a flow divider (19) is provided in the first cavity (17), an air pipe (18) is provided at the top of the flow divider (19), and a connecting pipe (20) is provided at the bottom of the flow divider (19). The lower mold (6) has upper mold moving parts on both sides, which are used to drive the upper mold (3) to move up and down.

2. The shaping equipment for manufacturing paper-plastic products according to claim 1, characterized in that, The upper mold (3) is provided with mounting holes that are compatible with the cavity pillar (5), and a heat-conducting plate (26) is provided at the bottom of the cavity pillar (5).

3. The shaping equipment for manufacturing paper-plastic products according to claim 2, characterized in that, The heat-conducting plate (26) includes a horizontal plate and multiple vertical plates. The horizontal plate is installed at the bottom of the cavity column (5), and the vertical plates are embedded in the bottom of the cavity column (5).

4. The shaping equipment for manufacturing paper-plastic products according to claim 1, characterized in that, The upper mold moving part is operated by a cylinder (16).

5. A method for operating a shaping device for manufacturing paper-plastic products according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Inject the well-stirred pulp into the cavity (21) of the lower mold (6), and at the same time, inject the heat source into the cavity of the column (25) to heat the heat-conducting plate (26) and then heat the cavity column (5); Step 2: Control the upper mold (3) to move downwards, so that the cavity column (5) enters the cavity (21) of the lower mold (6) to form a hot-pressed mold for the pulp in the cavity (21). At the same time, the negative pressure cavity (24) is in a negative pressure state, and water is introduced into the negative pressure cavity (24) along the connecting hole (22) and the through hole (23). Step 3: After the shaping is completed, the first connecting wheel (11) and the second connecting wheel (12) are rotated 180° so that the lower mold (6) is rotated to the top. Then, the heat source is introduced into the connecting hole (22) of the lower mold (6) through the air pipe (18) so as to blow the shaped paper-plastic mold in the cavity (21) off.

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