Vacuum sub-control type forming mold for paper-plastic forming machine

Abstract

The utility model discloses a vacuum sub-control type forming die for a paper-plastic forming machine, and relates to the technical field of paper-plastic production equipment, negative pressure suction holes are arranged at the bottom of a die cavity of the forming die in an array mode, a plurality of groups of vacuum cavities opposite to the negative pressure suction holes are arranged inside a die cavity of a vacuum die in a cross mode, and the negative pressure suction holes are communicated with the vacuum cavities. And vacuum suction assemblies opposite to the multiple groups of vacuum cavities are mounted at the mold bottom of the vacuum mold in a communicating manner. According to the design, vacuum separation of the vacuum mold is utilized, the vacuum mold is divided into a plurality of independent vacuum adsorption cavities, then under sub-control type independent vacuum suction of the vacuum suction assembly, sub-control type integrated suction work is carried out on water in paper pulp in the forming mold, the opening degree of a valve in a small-vacuum area is increased, vacuum is increased, and the water content in the paper pulp in the forming mold is increased. Or the opening degree of the valve in the area with large vacuum is adjusted to be small, vacuum is reduced, the overall quality balance is achieved, and the forming uniformity and stability of the paper-plastic wet blank are improved.

Description

Technical Field

[0001] The utility model relates to the field of paper-plastic production equipment, in particular to a vacuum controlled forming mould for a paper-plastic forming machine. Background Art

[0002] The production process of paper plastic mainly includes pulping, forming, drying, shaping, and post-processing. Among them, the forming process is one of the important process flows for forming paper plastic products. It is carried out by injecting the pulp after beating into the forming mold. As shown in the coffee pulp molding mold (public announcement number CN221029315U) disclosed on the China Patent Network, this type of device pours the pulp into the mold and uses a combination of drainage channels and drainage pipes to filter out the moisture in the pulp. Then, the upper and lower molds are pressed together to squeeze out the moisture from the pulp to obtain a wet paper plastic embryo.

[0003] However, the aforementioned patents and existing paper-to-plastic molding dies still have some shortcomings. The existing integrated channel assembly for draining moisture from the pulp suffers from poor overall stability. Local fluctuations in the channel can affect the overall stability, resulting in unstable quality. To address this, those skilled in the art have provided a vacuum-controlled molding die for a paper-to-plastic molding machine to address the issues raised in the background art. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a vacuum controlled forming mold for a paper plastic forming machine, which solves the problem of poor stability of the prior art in wet embryo forming of the paper plastic forming mold.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A vacuum controlled forming mold for a paper plastic forming machine, comprising a forming mold and a vacuum mold connected in one piece;

[0006] The bottom of the mold cavity of the forming mold is arranged in an array with negative pressure suction holes;

[0007] The interior of the vacuum mold cavity is arranged in a cross-shaped manner with multiple groups of vacuum cavities opposite to the negative pressure suction holes, and the bottom of the vacuum mold is connected to the vacuum suction assembly opposite to the multiple groups of vacuum cavities.

[0008] The vacuum extraction assembly includes a main control pipeline, and the main control pipeline is connected to and installed with sub-control pipelines corresponding to the vacuum chambers along its circumference, and a solenoid valve is installed in the middle of the pipeline of each group of control pipelines.

[0009] As a further technical solution of the present invention: the vacuum chambers are separated by a cross arranged inside the vacuum mold cavity, and the chambers of each group of vacuum chambers are the same size.

[0010] As a further technical solution of the present invention: a vacuum pressure sensor is installed inside the vacuum chamber opposite to the solenoid valve.

[0011] As a further technical solution of the present invention: the top cover of the branch control pipeline has a filter cover extending into the interior of the vacuum chamber, and the filter cover is fixed to the branch control pipeline by screwing.

[0012] As a further technical solution of the present invention: the forming mold and the vacuum mold are rotatably connected via a hinge.

[0013] As a further technical solution of the present invention: a positioning base A is provided on the side of the mold of the forming mold facing the hinge, and a positioning base B is provided on the side of the mold of the vacuum mold facing the hinge. The positioning base A and the positioning base B are aligned with each other, and the aligned ends of the positioning base A and the positioning base B are screwed with fastening bolts.

[0014] As a further technical solution of the present invention: the upper mold of the vacuum mold is provided with a sealing groove, and the lower mold of the forming mold is provided with a sealing flange corresponding to the sealing groove.

[0015] The utility model provides a vacuum controlled forming mold for a paper plastic forming machine, which has the following beneficial effects compared with the prior art:

[0016] 1. The forming mold of this design is based on the forming mold as the supporting mold for the pulp, and uses the vacuum partition of the vacuum mold to separate it into multiple independent vacuum adsorption chambers. Then, under the separately controlled and independent vacuum suction of the vacuum extraction component, the moisture in the pulp in the forming mold is extracted in a separately controlled and integrated manner. The opening and closing size of the solenoid valve in the vacuum extraction component is used to adjust the vacuum size of the corresponding area. By increasing the valve opening in the area with small vacuum to increase the vacuum, or reducing the valve opening in the area with large vacuum to reduce the vacuum, the overall quality balance is achieved, and the molding uniformity and stability of the paper-plastic wet embryo are improved.

[0017] 2. The molding mold of this design is based on the push-pull opening and closing of the molding mold and the vacuum mold, which can facilitate the opening and closing of the molding mold and the vacuum mold, and regularly clean the impurities inside them. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a vacuum controlled forming mold for a paper plastic forming machine;

[0019] Figure 2 This is a left view of a vacuum controlled forming mold for a paper plastic forming machine;

[0020] Figure 3 This is a schematic diagram of the opening and closing structure of a vacuum controlled forming mold for a paper plastic forming machine;

[0021] Figure 4 The diagram is a structural diagram of a vacuum extraction and attachment component in a vacuum controlled forming mold for a paper plastic forming machine.

[0022] In the figure: 1. Forming mold; 2. Vacuum mold; 3. Vacuum extraction assembly; 31. Main control pipeline; 32. Sub-control pipeline; 33. Solenoid valve; 34. Filter cover; 4. Negative pressure suction hole; 5. Positioning holder A; 6. Positioning holder B; 7. Fastening bolt; 8. Hinge; 9. Vacuum chamber; 10. Sealing slot; 11. Sealing flange. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The utility model provides a technical solution of a vacuum-controlled forming mold for a paper-molding machine: a vacuum-controlled forming mold for a paper-molding machine, comprising a forming mold 1 and a vacuum mold 2 connected as one body. The bottom of the mold cavity of the forming mold 1 is arranged in an array with negative pressure suction holes 4, and the interior of the mold cavity of the vacuum mold 2 is arranged in a cross form with multiple groups of vacuum cavities 9 that are opposite to the negative pressure suction holes 4. The vacuum cavities 9 are separated by a cross arranged inside the mold cavity of the vacuum mold 2, and the chamber sizes of each group of vacuum cavities 9 are the same. By dividing the vacuum cavity 9 in the vacuum mold 2 into vacuum chambers with independent spaces, the independent chambers do not affect each other, and the negative pressure suction of moisture in the pulp is more stable, and there will be no situation where a single fluctuation causes overall fluctuation.

[0025] The bottom of the vacuum mold 2 is connected to a vacuum extraction component 3 opposite to multiple groups of vacuum chambers 9. The vacuum extraction component 3 includes a main control pipeline 31. The main control pipeline 31 is connected to a branch control pipeline 32 opposite to the vacuum chamber 9 along its circumference, and a solenoid valve 33 is installed in the middle of each group of branch control pipelines 32. A vacuum pressure sensor opposite to the solenoid valve 33 is installed inside the vacuum chamber 9. By using the vacuum pressure sensor to monitor the vacuum pressure in each vacuum chamber 9, each vacuum chamber 9 maintains a rated vacuum pressure. Then, by increasing the valve opening of the solenoid valve 33 to increase the vacuum, or reducing the valve opening of the solenoid valve 33 to reduce the vacuum, the overall quality balance is achieved, and the molding uniformity and stability of the paper plastic wet embryo are improved.

[0026] The top cover of the branch control pipeline 32 has a filter cover 34 extending into the interior of the vacuum chamber 9, and the filter cover 34 and the branch control pipeline 32 are screwed and fixed together. By arranging the filter cover 34 on the branch control pipeline 32, the water adsorbed by the vacuum can be filtered and blocked, and the excess impurities can be filtered and isolated in the vacuum chamber 9, so as to prevent the impurities from entraining water and precipitating and gathering, thereby blocking the reflux pipeline.

[0027] The forming mold 1 and the vacuum mold 2 are rotatably connected by a hinge 8, and the hinge 8 is used as a flip-opening and closing connection point, so that the forming mold 1 and the vacuum mold 2 can be opened and closed in the form of a flip-open. The impurities accumulated inside are cleaned regularly, making cleaning simpler, more convenient and efficient.

[0028] A positioning card seat A5 is provided on the mold of the forming mold 1 and on the side facing the hinge 8, and a positioning card seat B6 is provided on the mold of the vacuum mold 2 and on the side facing the hinge 8. The positioning card seat A5 and the positioning card seat B6 are matched with each other, and the matching ends of the positioning card seat A5 and the positioning card seat B6 are screwed with fastening bolts 7. After the positioning card seat A5 and the positioning card seat B6 are matched, the forming mold 1 and the vacuum mold 2 are fixed as a whole by screwing the fastening bolts 7 into the inside of the two sets of positioning card seats.

[0029] The upper mold of the vacuum mold 2 is provided with a sealing groove 10, and the lower mold of the forming mold 1 is provided with a sealing flange 11 corresponding to the sealing groove 10. The sealing groove 10 and the sealing flange 11 are engaged with each other in an offset contact manner to ensure the sealing performance of the vacuum mold 2 and the forming mold 1.

[0030] The working principle of the present invention is as follows: when the forming mold is used as a forming mold for a wet embryo of paper plastic, the pulp is poured into the forming mold 1, and then based on the external vacuum equipment and the vacuum extraction component 3, the electromagnetic valve 33 is opened and closed, and under the shunt conduction of the sub-control pipeline 32, the multiple vacuum chambers 9 in the vacuum mold 2 are evacuated one by one, and the negative pressure suction force in the vacuum chamber 9 is used to suck the moisture in the pulp through the negative pressure suction hole 4, and the pulp in the forming mold 1 is subjected to a controlled vacuum treatment, and the respective areas are separated. The independent vacuum chambers 9 do not affect each other, and when fluctuations occur in the independent vacuum chambers 9, the valve opening of the solenoid valve 33 can be increased to increase the vacuum, or the valve opening of the solenoid valve 33 can be reduced to reduce the vacuum, so as to achieve overall quality balance. The moisture in the pulp is sucked out through the combination of the negative pressure suction hole 4, the vacuum chamber 9, and the sub-control pipeline 32, and is discharged through the main control pipeline 31. The moisture in the forming mold 1 is evenly and steadily extracted to form a paper-plastic wet embryo, which is then transferred to the drying mold for forming.

[0031] During the use of the forming mold, a cleaning process can be carried out regularly. At this time, the fastening bolts 7 between the two combined molds are unscrewed, and then the hinge 8 is used as the flip-opening and closing connection point to open and close the forming mold 1 and the vacuum mold 2 in the form of a flip-opening. The impurities accumulated inside are cleaned regularly. After cleaning, the mold is closed again and the matching fastening bolts 7 are screwed back. Cleaning is simpler, more convenient and efficient.

[0032] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A vacuum controlled forming mold for a paper plastic forming machine, characterized in that: It comprises a forming mold (1) and a vacuum mold (2) which are integrally connected; The bottom of the mold cavity of the forming mold (1) is provided with negative pressure suction holes (4) arranged in an array; The interior of the mold cavity of the vacuum mold (2) is provided with a plurality of vacuum cavities (9) arranged in a cross-shaped manner and communicating with the negative pressure suction holes (4), and a vacuum extraction assembly (3) is provided on the bottom of the mold of the vacuum mold (2) and is communicated with the plurality of vacuum cavities (9); The vacuum extraction assembly (3) comprises a main control pipeline (31), wherein the main control pipeline (31) is provided with sub-control pipelines (32) corresponding to the vacuum chambers (9) one by one, and a solenoid valve (33) is installed in the middle of each group of sub-control pipelines (32).

2. A vacuum controlled forming mold for a paper plastic forming machine according to claim 1, characterized in that: The vacuum cavities (9) are divided by a cross provided inside the cavity of the vacuum mold (2), and the cavity sizes of each group of vacuum cavities (9) are the same.

3. A vacuum controlled forming mold for a paper plastic forming machine according to claim 1, characterized in that: A vacuum pressure sensor is installed inside the vacuum chamber (9) and is opposite to the electromagnetic valve (33).

4. A vacuum controlled forming mold for a paper plastic forming machine according to claim 1, characterized in that: The top cover of the branch control pipeline (32) has a filter cover (34) extending into the interior of the vacuum chamber (9), and the filter cover (34) and the branch control pipeline (32) are screwed and fixed together by threads.

5. The vacuum controlled forming mold for a paper plastic forming machine according to claim 1, characterized in that: The forming mold (1) and the vacuum mold (2) are rotatably connected via a hinge (8).

6. A vacuum controlled forming mold for a paper plastic forming machine according to claim 5, characterized in that: A positioning card seat A (5) is provided on the mold of the forming mold (1) and on the side facing the hinge (8), and a positioning card seat B (6) is provided on the mold of the vacuum mold (2) and on the side facing the hinge (8). The positioning card seat A (5) and the positioning card seat B (6) are aligned with each other, and the aligned ends of the positioning card seat A (5) and the positioning card seat B (6) are screwed with fastening bolts (7).

7. The vacuum controlled forming mold for a paper plastic forming machine according to claim 1, characterized in that: The upper mold of the vacuum mold (2) is provided with a sealing groove (10), and the lower mold of the forming mold (1) is provided with a sealing flange (11) corresponding to the sealing groove (10).

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