Pulp suction mold of paper-plastic forming machine

Abstract

A pulp suction mold of a paper-plastic forming machine comprises a forming lower mold and a forming upper mold. The upper forming die and the lower forming die define at least one die cavity for containing paper pulp and at least one die orifice for communicating the outside with the at least one die cavity. The upper forming die further defines an upper air chamber and comprises a plurality of upper hole channels communicated with the at least one die cavity and the upper air chamber and an upper connector communicated with the outside and the upper air chamber, and an opening of the upper connector faces one side. The upper connector is located at the end, close to the at least one mold cavity, of the upper air chamber, and is suitable for sucking airflow to pass through the upper connector, sucking paper pulp in the pulp barrel into the at least one mold cavity from the at least one mold opening, and sucking air and paper pulp in the at least one mold cavity. Gas and liquid in paper pulp enter the upper gas chamber through the upper hole channel and then are discharged from the upper gas chamber through the upper connector.

Description

Technical Field

[0001] The present invention relates to a suction mold, and particularly to a suction mold for a paper-plastic molding machine. Background Art

[0002] A known paper pulp molding production mold disclosed in the Chinese Patent Publication No. CN219752850U patent case includes an upper mold and a lower mold that can be mated with the upper mold and define a bottle-shaped cavity. The upper mold includes a plurality of first negative pressure holes communicating with the bottle-shaped cavity. The lower mold includes a plurality of second negative pressure holes communicating with the bottle-shaped cavity. The first negative pressure holes and the second negative pressure holes are used to suck the gas and pulp in the bottle-shaped cavity, so that the gas and the liquid in the pulp are discharged, and the fibers in the pulp are adsorbed on the walls of the upper mold and the lower mold to form a wet paper bottle model.

[0003] Since the first negative pressure holes and the second negative pressure holes are directly connected to a vacuum pump, in the case of no buffer space, there are situations where the suction force is small and the magnitude of the suction force is unstable. Therefore, there are often technical problems such as uneven thickness or thickness not meeting the standard in the paper bottle model. Summary of the Invention

[0004] The purpose of the present invention is to provide a suction mold for a paper-plastic molding machine that can improve the quality of the finished product.

[0005] The suction mold of the paper-plastic molding machine of the present invention is applicable to a pulp bucket for receiving and discharging pulp, and the suction mold includes a molding lower mold and a molding upper mold.

[0006] The molding upper mold and the molding lower mold define at least one mold cavity for receiving pulp and at least one mold opening communicating with the outside and the at least one mold cavity. The molding upper mold further defines an upper air chamber located above the at least one mold cavity in the up-down direction, and includes a plurality of upper channels communicating with the at least one mold cavity and the upper air chamber, and an upper interface communicating with the outside and the upper air chamber and opening towards one side. The upper interface is located at one end of the upper air chamber adjacent to the at least one mold cavity in the up-down direction, and is suitable for sucking the pulp in the pulp bucket by an attracting air flow to enter the at least one mold cavity through the at least one mold opening, and sucking the gas and the liquid in the pulp in the at least one mold cavity to enter the upper air chamber through the upper channels, and then discharging from the upper air chamber through the upper interface.

[0007] In the suction mold of the paper-plastic molding machine of the present invention, the upper interface extends in the horizontal direction.

[0008] The slurry suction mold of the paper-plastic molding machine of the present invention, the lower molding die includes a lower die surface, and the upper molding die further includes an upper die surface, and the upper die surface cooperates with the lower die surface to define the at least one mold cavity and the at least one mold opening.

[0009] The slurry suction mold of the paper-plastic molding machine of the present invention, the upper molding die further includes an upper inner surface of the upper die away from the at least one mold cavity, and a lower inner surface of the upper die adjacent to the at least one mold cavity and defining the upper air chamber with the upper inner surface of the upper die. The upper interface is separated from the upper inner surface of the upper die by a first distance, and is separated from the lower inner surface of the upper die by a second distance less than the first distance.

[0010] The slurry suction mold of the paper-plastic molding machine of the present invention, the ratio of the first distance to the second distance is between 9:1 and 6:4.

[0011] The slurry suction mold of the paper-plastic molding machine of the present invention, the lower inner surface of the upper die is configured as an inclined surface that is high in the center and low in the periphery and has a generally inverted V-shaped cross section.

[0012] The slurry suction mold of the paper-plastic molding machine of the present invention, the lower molding die defines a lower air chamber located below the at least one mold cavity in the up-down direction, and includes a plurality of lower channels communicating the at least one mold cavity and the lower air chamber, and a lower interface communicating the outside and the lower air chamber and located below the lower air chamber in the up-down direction. The lower interface is adapted to allow the suction air flow to pass through, and is adapted to suck the paper pulp in the pulp bucket to enter the at least one mold cavity through the at least one mold opening, and to suck the gas and paper pulp in the at least one mold cavity, so that the liquid in the gas and paper pulp enters the lower air chamber through the lower channels, and then is discharged from the lower air chamber through the lower interface.

[0013] The slurry suction mold of the paper-plastic molding machine of the present invention, the lower molding die further includes an upper inner surface of the lower die adjacent to the at least one mold cavity, and a lower inner surface of the lower die away from the at least one mold cavity and defining the lower air chamber with the upper inner surface of the lower die.

[0014] [[ID=:18]]The slurry suction mold of the paper-plastic molding machine of the present invention, the lower inner surface of the lower die is configured as an inclined surface that is low in the center and high in the periphery and has a generally V-shaped cross section.

[0015] The beneficial effect of the present invention is that: by forming a buffer space for storing gas and liquid through the upper air chamber, and through the design that the upper interface is adjacent to the at least one mold cavity, the liquid in the paper pulp can be quickly discharged from the upper interface after entering the upper air chamber, thereby improving the suction effect and the stability during suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein:

[0017] Figure 1 is an incomplete front view showing the installation of an embodiment of the slurry suction mold of the present invention in a paper-plastic molding machine;

[0018] Figure 2 is a top view of the said embodiment;

[0019] Figure 3 is a cross-sectional view taken along line III-III in Figure 2 ;

[0020] Figure 4 is a cross-sectional view taken along line IV-IV in Figure 2 ;

[0021] Figure 5 is a partial enlarged cross-sectional view of the said embodiment;

[0022] Figure 6 is a cross-sectional view similar to Figure 3 , but the cross-section of the inner surface of the lower part of the lower mold is V-shaped and the cross-section of the inner surface of the lower part of the upper mold is inverted V-shaped;

[0023] Figure 7 is a cross-sectional view similar to Figure 4 , showing the flow of fluid towards the lower interface and the upper interface. Detailed implementation mode

[0024] Refer to Figures 1 to 4 , an embodiment of the slurry suction mold of the present invention, is installed in a paper-plastic molding machine 1. The paper-plastic molding machine 1 includes a frame unit 11, a pulp bucket 12 installed on the frame unit 11 and adapted to contain pulp, and a vacuum pump 13 installed on the frame unit 11. The slurry suction mold is movably installed on the frame unit 11 along an up-and-down direction Z relative to the pulp bucket 12, and includes a molding lower mold 2 and a molding upper mold 3.

[0025] Refer to Figure 1 , Figures 3 to 5 , the molding lower mold 2 includes a lower mold surface 21 facing the molding upper mold 3, a lower inner surface 22 of the lower mold adjacent to the lower mold surface 21 along the up-and-down direction Z, a lower inner surface 23 of the lower mold away from the lower mold surface 21 along the up-and-down direction Z and defining a lower air chamber 20 with the lower inner surface 22 of the lower mold, a plurality of lower channels 24 communicating the mold cavity 301 with the lower air chamber 20, and a lower interface 25 communicating the outside with the lower air chamber 20 and located below the lower air chamber 20 along the up-and-down direction Z. In this embodiment, the lower inner surface 22 of the lower mold and the lower inner surface 23 of the lower mold are respectively a plane.

[0026] The upper forming die 3 includes an upper die surface 31 facing the lower die surface 21 and capable of defining a plurality of die cavities 301 and a plurality of die openings 302 with the lower die surface 21, an upper inner surface 32 of the upper die away from the die cavities 301, a lower inner surface 33 of the upper die adjacent to the die cavities 301 and defining an upper air chamber 303 with the upper inner surface 32 of the upper die, a plurality of upper channels 34 communicating the die cavities 301 with the upper air chamber 303, and an upper interface 35 communicating the outside with the upper air chamber 303 and having an opening facing one side in a horizontal direction. The die cavities 301 are adapted to accommodate pulp. Each of the die openings 302 communicates the outside with its respective die cavity 301. In this embodiment, the upper inner surface 32 of the upper die and the lower inner surface 33 of the upper die are respectively a plane. The upper interface 35 is adjacent to the lower inner surface 33 of the upper die along the up-down direction Z. The upper interface 35 is separated from the upper inner surface 32 of the upper die by a first distance d1 and from the lower inner surface 33 of the upper die by a second distance d2 smaller than the first distance d1. The ratio of the first distance d1 to the second distance d2 is between 9:1 and 6:4. Preferably, the ratio of the first distance d1 to the second distance d2 is configured to be 8:2.

[0027] When the vacuum pump 13 sucks the gas in the die cavity 301 out through the upper interface 35 and the lower interface 25 to form an attracting air flow, the pulp will enter the die cavity 301 from the die opening 302. At this time, in addition to entering the upper air chamber 303 through the upper channels 34 and then being discharged to the outside through the upper interface 35 from the upper air chamber 303, the gas and the liquid in the pulp will also enter the lower air chamber 20 through the lower channels 24 and then be discharged to the outside through the lower interface 25 from the lower air chamber 20. At the same time, the paper fibers in the pulp are adsorbed on the upper die surface 31 and the lower die surface 21 and are shaped into a plurality of blanks 4 according to the shape of the die cavity 301.

[0028] It should be noted that generating an attracting air flow by the vacuum pump 13 between the upper forming die 3 and the lower forming die 2 to make the paper fibers in the pulp adhere to the upper die surface 31 and the lower die surface 21 is a prior art and not a technical feature of this case. Those skilled in the art can infer and expand the details based on the above description, so no further description will be given.

[0029] The features of the present invention are that the volumes of the upper air chamber 303 and the lower air chamber 20 can increase the flow rate and suction force of the suction airflow. Additionally, by disposing the upper interface 35 adjacent to the cavity 301 instead of along the up-down direction Z above the upper air chamber 303, the liquid in the pulp can be discharged immediately from the upper interface 35 after entering the upper air chamber 303. Besides not having to wait for the liquid to fill the upper air chamber 303 to discharge the liquid, it can also avoid the situation where the suction force is affected by the liquid filling the upper air chamber 303.

[0030] Moreover, through the design that the ratio of the first spacing d1 to the second spacing d2 is configured as 8:2, the liquid in the pulp can enter the upper air chamber 303 in large quantities and quickly without being restricted by the volume of the upper air chamber 303, and when the height of the liquid accumulated along the up-down direction Z is approximately equal to 1 / 4 of the height of the upper air chamber 303 along the up-down direction Z, it can be drawn away from the upper mold 3 by the upper interface 35.

[0031] It should be noted that the ratio of the first spacing d1 to the second spacing d2 is not limited to being configured as 8:2. In other variations of this embodiment, it can also be configured as 9:1, 7:3, or 6:4. Additionally, the number of cavities 301 is not limited to multiple. In other variations of this embodiment, it can also be 1 or only arranged in 1 row for forming 1 blank 4 or forming multiple blanks 4 arranged in 1 row. And the number of upper interfaces 35 is not limited to only 1. In other variations of this embodiment, it can also be 2 or more than 2.

[0032] It is worth noting that the lower inner surface 23 of the lower mold 2 of the molding lower mold 2 is not limited to being configured as a flat surface. In other variations of this embodiment, it can also be, as Figure 6 、 Figure 7 shown, configured as an inclined surface that is low in the center and high around the perimeter and has a generally V-shaped cross-section. Thereby, the liquid entering the lower air chamber 20 can flow more quickly and concentratedly towards the lower interface 25. Similarly, the lower inner surface 33 of the upper mold 3 of the molding upper mold 3 is not limited to being configured as a flat surface. In other variations of this embodiment, it can also be, as Figure 6 、 Figure 7 shown, configured as an inclined surface that is high in the center and low around the perimeter and has a generally inverted V-shaped cross-section. Thereby, the liquid entering the upper air chamber 303 can flow more quickly and concentratedly towards the upper interface 35.

[0033] Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

[0034] 1. The present invention can increase the flow rate and suction force of the suction airflow through the volumes of the upper air chamber 303 and the lower air chamber 20, thereby improving the suction efficiency.

[0035] 2. Importantly, the present invention can also, through the design that the upper interface 35 is adjacent to the cavity 301, enable the liquid in the pulp to be quickly discharged from the upper interface 35 after entering the upper air chamber 303, which can not only improve the stability during suction, but also further improve the suction efficiency.

[0036] As described above, the above are only embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present invention still fall within the scope of the present invention.

Claims

1. A pulp suction mold for a paper-plastic molding machine, applicable to entering and exiting a pulp bucket for containing pulp, the pulp suction mold comprising: A lower molding die; and An upper molding die, which defines at least one mold cavity for containing pulp with the lower molding die, and at least one mold opening for communicating the outside with the at least one mold cavity, characterized in that: The upper molding die further defines an upper air chamber located above the at least one mold cavity in the vertical direction, and includes a plurality of upper channels communicating the at least one mold cavity with the upper air chamber, and an upper interface communicating the outside with the upper air chamber and having an opening facing one side. The upper interface is located at one end of the upper air chamber adjacent to the at least one mold cavity in the vertical direction, and is applicable for a suction air flow to suck the pulp in the pulp bucket to enter the at least one mold cavity through the at least one mold opening, and to suck the gas and the liquid in the pulp in the at least one mold cavity to enter the upper air chamber through the upper channels, and then to be discharged from the upper air chamber through the upper interface.

2. The suction slurry mold of the paper-plastic molding machine according to claim 1, characterized in that: The upper interface extends in the horizontal direction.

3. The slurry suction mold of the paper-plastic molding machine according to claim 1, characterized in that: The lower molding die includes a lower mold surface, and the upper molding die further includes an upper mold surface. The upper mold surface and the lower mold surface cooperate to define the at least one mold cavity and the at least one mold opening.

4. The slurry suction mold of the paper-plastic molding machine according to claim 3, characterized in that: The upper molding die further includes an upper inner surface of the upper mold away from the at least one mold cavity, and an upper inner surface of the lower mold adjacent to the at least one mold cavity and defining the upper air chamber with the upper inner surface of the upper mold. The upper interface is separated from the upper inner surface of the upper mold by a first distance, and is separated from the upper inner surface of the lower mold by a second distance smaller than the first distance.

5. The slurry suction mold of the paper-plastic molding machine according to claim 4, characterized in that: The ratio of the first distance to the second distance is between 9:1 and 6:

4.

6. The suction slurry mold of the paper-plastic molding machine according to claim 4, characterized in that: The upper inner surface of the lower mold is configured as an inclined surface that is high in the center and low in the periphery and has a generally inverted V-shaped cross section.

7. The slurry suction mold of the paper-plastic molding machine according to claim 1, characterized in that: The lower molding die defines a lower air chamber located below the at least one mold cavity in the vertical direction, and includes a plurality of lower channels communicating the at least one mold cavity with the lower air chamber, and a lower interface communicating the outside with the lower air chamber and located below the lower air chamber in the vertical direction. The lower interface is applicable for a suction air flow to pass through, and is applicable for sucking the pulp in the pulp bucket to enter the at least one mold cavity through the at least one mold opening, and for sucking the gas and the pulp in the at least one mold cavity, so that the gas and the liquid in the pulp enter the lower air chamber through the lower channels, and then are discharged from the lower air chamber through the lower interface.

8. The slurry suction mold of the paper-plastic molding machine according to claim 7, characterized in that: The lower molding die further includes an upper inner surface of the lower mold adjacent to the at least one mold cavity, and a lower inner surface of the lower mold away from the at least one mold cavity and defining the lower air chamber with the upper inner surface of the lower mold.

9. The suction slurry mold of the paper-plastic molding machine according to claim 8, characterized in that: The lower inner surface of the lower mold is configured as an inclined surface that is low in the center and high in the periphery and has a generally V-shaped cross section.

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