CN216688834U

CN216688834U - Paper mold forming device

Info

Publication number: CN216688834U
Application number: CN202122910804.3U
Authority: CN
Inventors: 吴娇平; 陈忠
Original assignee: Guangdong Huagong Huanyuan Environmental Protection Technology Co ltd
Current assignee: Guangdong Huagong Huanyuan Environmental Protection Technology Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-07
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a paper mold forming device, which comprises a rack, a water mold arranged on the rack, a screen pressing frame arranged on the rack in a sliding manner, a first air cylinder with a first telescopic end and used for driving the screen pressing frame to be close to or far away from the water mold, a second air cylinder with a second telescopic end and used for driving the screen pressing frame to be close to or far away from the water mold, and a telescopic frame positioned between the rack and the screen pressing frame and connected with the rack and the screen pressing frame, wherein the first air cylinder is provided with a first telescopic end and used for driving the screen pressing frame to be close to or far away from the water mold; the first air cylinder and the second air cylinder are arranged on the rack at intervals, the expansion bracket is positioned between the first air cylinder and the second air cylinder, and the first expansion end and the second expansion end are respectively connected with the net pressing frame. The utility model can ensure that each area of the lower surface of the screen pressing frame can be synchronously pressed on the upper surface of the water mold, so that the upper surface of the water mold is uniformly pressed, the production efficiency and the quality of the paper mold are improved, and the utility model belongs to the technical field of paper mold production.

Description

Paper mold forming device

Technical Field

The utility model relates to the technical field of paper mold production, in particular to a paper mold forming device.

Background

The air outlets of the two cylinders are respectively adjusted by the existing paper mold forming device through the pneumatic speed regulating valve, so that the lower surface of the screen frame can be synchronously pressed on the upper surface of the water mold as far as possible, however, air pressure of an air source fluctuates along with the air consumption of a factory, the friction force of a piston moving part of each cylinder has deviation, after the pneumatic speed regulating valve is well calibrated and used for a period of time, the two cylinders can generate asynchronous phenomena, so that the synchronization can be realized when the two cylinders are pressed down difficultly, and further the whole lower surface of the screen frame can not be simultaneously pressed on the upper surface of the water mold, and the production efficiency and the quality of the paper film are reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems in the prior art, the utility model aims to: the utility model provides a paper mold forming device which can ensure that each area of the lower surface of a screen pressing frame can be synchronously pressed on the upper surface of a water mold, so that the upper surface of the water mold is uniformly pressed, and the production efficiency and the quality of the paper mold are improved.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a paper mold forming device comprises a rack, a water mold arranged on the rack, a screen pressing frame arranged on the rack in a sliding mode, a first air cylinder with a first telescopic end and used for driving the screen pressing frame to be close to or far away from the water mold, a second air cylinder with a second telescopic end and used for driving the screen pressing frame to be close to or far away from the water mold, and a telescopic frame located between the rack and the screen pressing frame and connected with the rack and the screen pressing frame; the first air cylinder and the second air cylinder are arranged on the rack at intervals, the expansion bracket is positioned between the first air cylinder and the second air cylinder, and the first expansion end and the second expansion end are respectively connected with the net pressing frame.

Further, the telescopic frame comprises a first rocker, a second rocker, a third rocker, a fourth rocker and a connecting seat; the first rocking bar and the second rocking bar are arranged at intervals and are parallel to each other, and the third rocking bar and the fourth rocking bar are arranged at intervals and are parallel to each other;

one end of the first rocker and one end of the second rocker are respectively pivoted with the frame, one end of the third rocker and one end of the fourth rocker are respectively pivoted with the screen pressing frame, and the other end of the first rocker, the other end of the second rocker, the other end of the third rocker and the other end of the fourth rocker are respectively pivoted with the connecting seat.

Further, the connecting seat comprises a first balance rod and a second balance rod; the first balance bar and the second balance bar are parallel to each other;

one end of the first balance rod is pivoted with the first rocker, and the other end of the first balance rod is pivoted with the second rocker; one end of the second balance rod is pivoted with the third rocker, and the other end of the second balance rod is pivoted with the fourth rocker.

Further, the connecting seat further comprises a plurality of first connecting rods, a plurality of second connecting rods and a plurality of third balance rods;

the first connecting rods are sequentially pivoted, a first preset included angle is formed between every two adjacent first connecting rods, the first connecting rod at one end is pivoted with the first rocker and forms a second preset included angle with the first rocker, and the first connecting rod at the other end is pivoted with the third rocker and forms a third preset included angle with the third rocker; the second connecting rods are sequentially pivoted, a fourth preset included angle is formed between every two adjacent second connecting rods, the second connecting rod at one end is pivoted with the second rocking rod and forms a fifth preset included angle with the second rocking rod, and the second connecting rod at the other end is pivoted with the fourth rocking rod and forms a sixth preset included angle with the fourth rocking rod; the first predetermined included angle, the second predetermined included angle, the third predetermined included angle, the fourth predetermined included angle, the fifth predetermined included angle and the sixth predetermined included angle are respectively greater than 0 degree and less than 90 degrees or greater than 90 degrees and less than 180 degrees.

The plurality of third balance bars are arranged at intervals along the telescopic direction of the first telescopic end, the first balance bar, the second balance bar and the plurality of third balance bars are parallel to each other, each third balance bar is respectively positioned between the first balance bar and the second balance bar, one end of each third balance bar is respectively pivoted with the first connecting bar, and the other end of each third balance bar is respectively pivoted with the second connecting bar.

Furthermore, the first connecting rod and the second connecting rod are respectively provided with one, one end of the first connecting rod is pivoted with the first rocker through a first pivot, the other end of the first connecting rod is pivoted with the third rocker through a third pivot, one end of the second connecting rod is pivoted with the second rocker through a second pivot, the other end of the second connecting rod is pivoted with the fourth rocker through a fourth pivot, one end of the first balancing rod is pivoted with the first pivot, the other end of the first balancing rod is pivoted with the second pivot, one end of the second balancing rod is pivoted with the third pivot, and the other end of the second balancing rod is pivoted with the fourth pivot.

Further, a first limiting piece is arranged on the first balance bar, and a second limiting piece is arranged on the second balance bar; the first limiting piece is located on a rotating path of the first rocking bar or the second rocking bar, and the second limiting piece is located on a rotating path of the third rocking bar or the fourth rocking bar.

Further, a first abutting seat used for preventing the first rocker from being perpendicular to the first connecting rod is arranged on the first rocker, and when the first rocker and the first connecting rod tend to be perpendicular, the rack is located in the moving direction of the first abutting seat and abuts against the first abutting seat; the third rocker is provided with a second abutting seat for preventing the third rocker from being perpendicular to the second connecting rod; when the third rocker and the second connecting rod tend to be vertical, the screen pressing frame is positioned in the moving direction of the first abutting seat and abutted against the second abutting seat.

Further, the machine frame comprises a base for placing the water mold, a guide rod arranged on the base, and a cross beam arranged on the guide rod; the screen pressing frame is located between the base and the cross beam and is arranged on the guide rod in a sliding mode.

Further, the screen pressing frame is provided with a sliding frame which is arranged on the guide rod in a sliding mode; the third rocker and the fourth rocker are respectively pivoted with the sliding frame.

Furthermore, two guide rods are arranged at intervals, one end of the sliding frame is arranged on one guide rod in a sliding mode, the other end of the sliding frame is arranged on the other guide rod in a sliding mode, and the first air cylinder and the second air cylinder are located between the two guide rods respectively.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the lower surface of the screen pressing frame synchronously moves through the telescopic frame, and is kept horizontal under the driving of the telescopic frame, so that each area of the lower surface of the screen pressing frame can synchronously press the upper surface of the water mold, the upper surface of the water mold is uniformly pressed, and the production efficiency and quality of the paper mold are improved.

Drawings

FIG. 1 is a schematic structural view of a paper pattern forming apparatus, in which a water pattern is omitted;

FIG. 2 is a front view of the paper pattern forming apparatus with both the first cylinder and the second cylinder extended, with the water pattern omitted;

FIG. 3 is a front view of the paper pattern forming apparatus with both the first and second cylinders contracted, with the water pattern omitted;

fig. 4 is a schematic structural view of the telescopic frame.

In the figure, 1, a frame; 2. pressing the screen frame; 3. a first cylinder; 4. a second cylinder; 5. a telescopic frame; 11. a base; 12. a guide bar; 13. a cross beam; 21. a carriage; 31. a first telescoping end; 41. a second telescopic end; 51. a first rocker; 52. a second rocker; 53. a third rocker; 54. a fourth rocker; 55. a connecting seat; 56. a first limit piece; 57. a second limiting member; 58. a first abutting seat; 59. a second abutting seat; 551. a first balance bar; 552. a second balance bar; 553. a first link; 554. a second link; 555. a third balance bar; 556. a first pivot; 557. a second pivot; 558. a third pivot; 559. and a fourth pivot.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "first", "second", and the like are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information may also be referred to as "second" information, and similarly, the "second" information may also be referred to as "first" information, without departing from the scope of the utility model.

For convenience of description, unless otherwise noted, the up-down direction described below coincides with the up-down direction of fig. 1 itself, and the left-right direction described below coincides with the left-right direction of fig. 1 itself.

As shown in fig. 1 to 4, the present embodiment provides a paper mold forming device, which includes a frame 1, a water mold mounted on the frame 1, a net pressing frame 2, a first cylinder 3 having a first telescopic end 31 and used for driving the net pressing frame 2 to approach or be away from the water mold, a second cylinder 4 having a second telescopic end 41 and used for driving the net pressing frame 2 to approach or be away from the water mold, and a telescopic frame 5 located between the frame 1 and the net pressing frame 2 and connecting the frame 1 and the net pressing frame 2. The first air cylinder 3 and the second air cylinder 4 are vertically arranged and fixed above the net pressing frame 2, and the net pressing frame 2 is positioned above the water mould. The first telescopic end 31 of the first cylinder 3 and the second telescopic end 41 of the second cylinder 4 slide up and down to realize the telescopic effect. First cylinder 3 and second cylinder 4 interval installation are in frame 1, and expansion bracket 5 is located between first cylinder 3 and the second cylinder 4, and first cylinder 3 is located the right side of second cylinder 4, and expansion bracket 5 is located between first cylinder 3 and the second cylinder 4. The first telescopic end 31 and the second telescopic end 41 are respectively connected with the net pressing frame 2. The first telescopic end 31 of the first cylinder 3 is connected with the right end of the screen pressing frame 2, and the second telescopic end 41 of the second cylinder 4 is connected with the left end of the screen pressing frame 2. The telescopic bracket 5 can be vertically extended and contracted along with the up and down movement of the first telescopic end 31 of the first cylinder 3 or the second telescopic end 41 of the second cylinder 4. When the first telescopic end 31 of the first cylinder 3 and the second telescopic end 41 of the second cylinder 4 move up and down asynchronously, the left end and the right end of the net pressing frame 2 can be synchronously pressed down by drawing the telescopic frame 5, and the lower end surface of the net pressing frame 2 is ensured to keep a water surface and be pressed on the upper surface of a water mould.

Specifically, in one embodiment, the telescopic frame 5 comprises a first rocking bar 51, a second rocking bar 52, a third rocking bar 53, a fourth rocking bar 54, and a connecting seat 55; the first rocker 51 and the second rocker 52 are arranged at intervals and are parallel to each other, and the third rocker 53 and the fourth rocker 54 are arranged at intervals and are parallel to each other; the upper end of the first rocker 51 and the upper end of the second rocker 52 are respectively pivoted on the frame 1 through a support, and the upper end of the third rocker 53 and the upper end of the fourth rocker 54 are respectively pivoted on the screen pressing frame 2 through a support.

One end of the first rocker 51 and one end of the second rocker 52 are respectively pivoted with the frame 1, one end of the third rocker 53 and one end of the fourth rocker 54 are respectively pivoted with the net pressing frame 2, and the other end of the first rocker 51, the other end of the second rocker 52, the other end of the third rocker 53 and the other end of the fourth rocker 54 are respectively pivoted with the connecting seat 55. The first rocker 51 and the second rocker 52 synchronously rotate and keep parallel through the connecting seat 55, the third rocker 53 and the fourth rocker 54 synchronously rotate and keep parallel through the connecting seat 55, the first rocker 51 is positioned above the third rocker 53, the second rocker 52 is positioned above the fourth rocker 54, the pivot point of the first rocker 51 and the rack 1, the pivot point of the third rocker 53 and the net pressing frame 2 are positioned on the same vertical line, and the pivot point of the second rocker 52 and the rack 1, and the pivot point of the fourth rocker 54 and the net pressing frame 2 are positioned on the same vertical line. The first rocker 51, the second rocker 52, the third rocker 53 and the fourth rocker 54 rotate respectively to enable the third rocker 53 and the fourth rocker 54 to be far away from or close to the first rocker 51 and the second rocker 52, so that the telescopic frame 5 is stretched.

Specifically, in one embodiment, attachment base 55 includes a first balance bar 551 and a second balance bar 552; the first and second balance bars 551 and 552 are parallel to each other; the first and second balance bars 551 and 552 are horizontally spaced apart from each other from top to bottom.

The right end of the first balance bar 551 is pivoted with the first rocking bar 51, and the left end of the first balance bar 551 is pivoted with the second rocking bar 52; the right end of the second balance bar 552 is pivotally connected to the third rocking bar 53, and the left end of the second balance bar 552 is pivotally connected to the fourth rocking bar 54. When the telescopic frame 5 is extended and contracted, the first balance bar 551 and the second balance bar 552 may be moved closer to or away from each other.

In addition, the first rocking bar 51 can also be directly pivoted with the third rocking bar 53, the second rocking bar 52 can also be directly pivoted with the fourth rocking bar 54, then only the first balance bar 551 or the second balance bar 552 is arranged, the pivoting position of the first rocking bar 51 and the third rocking bar 53 is pivoted with one end of the first balance bar 551, and the pivoting position of the second rocking bar 52 and the fourth rocking bar 54 is pivoted with the other end of the first balance bar 551.

Specifically, in one embodiment, the connecting seat 55 is a plurality of parallelograms with straight rods pivotally connected and sequentially arranged from top to bottom. The interior angle of the connection socket 55 is not equal to ninety degrees. The connecting block 55 further includes a plurality of first links 553, a plurality of second links 554, and a plurality of third balance bars 555.

The first links 553 are sequentially pivoted from top to bottom and form a first predetermined included angle between two adjacent first links 553, the first link 553 positioned at the top is pivoted with the first rocker 51 and forms a second predetermined included angle with the first rocker 51, and the first link 553 positioned at the bottom is pivoted with the third rocker 53 and forms a third predetermined included angle with the third rocker 53. The second connecting rods 554 are pivoted from top to bottom in sequence, a fourth predetermined included angle is formed between two adjacent second connecting rods 554, the second connecting rod 554 located at the uppermost position is pivoted with the second rocking bar 52 and forms a fifth predetermined included angle with the second rocking bar 52, and the second connecting rod 554 located at the lowermost position is pivoted with the fourth rocking bar 54 and forms a sixth predetermined included angle with the fourth rocking bar 54. A plurality of third balance bars 555 are arranged along the first telescopic end 31 at intervals from top to bottom; the plurality of third balance bars 555 are horizontally disposed, respectively. The first preset included angle, the second preset included angle, the third preset included angle, the fourth preset included angle, the fifth preset included angle and the sixth preset included angle are respectively more than 0 degrees and less than 90 degrees or more than 90 degrees and less than 180 degrees. The first preset included angle, the second preset included angle, the third preset included angle, the fourth preset included angle, the fifth preset included angle and the sixth preset included angle are not equal to 90 degrees, the first rocker 51, the first connecting rod 553 and the third rocker 53 are prevented from being located on the same vertical line, the second rocker 52, the second connecting rod 554 and the fourth rocker 54 are prevented from being located on the same vertical line, and the telescopic frame 5 is prevented from being locked when being stretched up and down. The screen pressing frame 2, the cross beam 13 of the rack 1 and the telescopic frame 5 form a plurality of groups of parallelogram frames, and when the cylinders on two sides push and press the screen frame 2 downwards, the screen pressing frame 2 is ensured to horizontally move up and down while the synchronous cylinders stretch and retract by utilizing the parallelogram principle.

The first balance bar 551, the second balance bar 552, and the plurality of third balance bars 555 are parallel to each other, each third balance bar 555 is respectively located between the first balance bar 551 and the second balance bar 552, one end of each third balance bar 555 is respectively pivoted with the first link 553, and the other end of each third balance bar 555 is respectively pivoted with the second link 554.

Specifically, in one embodiment, there is one first link 553 and one second link 554, one end of the first link 553 is pivotally connected to the first rocker 51 through a first pivot 556, the other end of the first link 553 is pivotally connected to the third rocker 53 through a third pivot 558, one end of the second link 554 is pivotally connected to the second rocker 52 through a second pivot 557, the other end of the second link 554 is pivotally connected to the fourth rocker 54 through a fourth pivot 559, one end of the first balance bar 551 is pivotally connected to the first pivot 556, the other end of the first balance bar 551 is pivotally connected to the second pivot 557, one end of the second balance bar 552 is pivotally connected to the third pivot 558, and the other end of the second balance bar 552 is pivotally connected to the fourth pivot 559.

Specifically, in one embodiment, the first limiting member 56 is disposed on the first balance bar 551, and the second limiting member 57 is disposed on the second balance bar 552; the first limiting member 56 and the second limiting member 57 are both screws. The first limiting member 56 is located on a rotation path of the first rocking bar 51 or the second rocking bar 52, and the second limiting member 57 is located on a rotation path of the third rocking bar 53 or the fourth rocking bar 54. The first and second limiting

members

56 and 57 are used to prevent the parallelogram from colliding with the first and

second cylinders

3 and 4 due to an excessively small included angle when the expansion bracket 5 is contracted.

Specifically, in one embodiment, a third limiting member is disposed on the third balance bar 555.

Specifically, in one embodiment, the first rocking bar 51 is provided with a first abutting seat 58 for preventing the first rocking bar 51 from being perpendicular to the first link 553, and when the first rocking bar 51 and the first link 553 tend to be perpendicular, the rack 1 is located in the moving direction of the first abutting seat 58 and abuts against the first abutting seat 58; the third rocker 53 is provided with a second abutting seat 59 for preventing the third rocker 53 from being perpendicular to the second connecting rod 554; when the third rocker 53 and the second connecting rod 554 tend to be perpendicular, the net pressing frame 2 is located in the moving direction of the first abutting seat 58 and abuts against the second abutting seat 59. The first abutting seat 58 and the second abutting seat 59 prevent the first predetermined included angle, the second predetermined included angle, the third predetermined included angle, the fourth predetermined included angle, the fifth predetermined included angle and the sixth predetermined included angle from forming a right angle to form a right-angled quadrangle during early installation, and further prevent the position of the expansion bracket 5 from being located on a clamping position.

Specifically, in one embodiment, the machine frame 1 comprises a base 11 for placing a water mould, a guide rod 12 mounted on the base 11, and a beam 13 mounted on the guide rod 12; the first rocker 51 and the second rocker 52 are respectively pivoted with the beam 13, the beam 13 is located above the base 11, and the net pressing frame 2 is located between the base 11 and the beam 13 and is slidably arranged on the guide rod 12. The water mold is installed on the upper surface of the base 11.

Specifically, in one embodiment, the screen pressing frame 2 has a carriage 21 for sliding on the guide bar 12; the sliding frame 21 is fixed on the upper end of the screen pressing frame 2, and the third rocker 53 and the fourth rocker 54 are respectively pivoted with the sliding frame 21. The first cylinder 3 and the second cylinder 4 are respectively mounted on the cross beam 13. The telescopic frame 5 is a synchronous mechanism, so that the friction force cannot be increased due to asynchronism between the sliding frame 21 and the guide rod, the abrasion between the sliding frame 21 and the guide rod is avoided too fast, the stability of pressing the screen frame 2 is greatly improved, and the service life of the weekend forming device is prolonged.

Specifically, in one embodiment, two guide rods 12 are arranged at intervals, one end of the cross beam 13 is connected with one guide rod 12, the other end of the cross beam 13 is connected with the other guide rod 12, one end of the sliding frame 21 is arranged on one guide rod 12 in a sliding mode, the other end of the sliding frame 21 is arranged on the other guide rod 12 in a sliding mode, and the first air cylinder 3 and the second air cylinder 4 are respectively located between the two guide rods.

The working principle of the utility model is as follows: the first cylinder and the second cylinder are started, so that the two ends of the screen pressing frame are pressed down simultaneously, the pneumatic speed regulating valves on the first cylinder and the second cylinder are regulated respectively, the lower surface of the screen pressing frame is guaranteed to be evenly pressed on the upper surface of the water mold, and the paper mold is produced. After first cylinder and second cylinder carried out long-time work, atmospheric pressure unstability can appear in first cylinder and second cylinder, and under the drive of expansion bracket, the first cylinder and the second cylinder at the both ends of pressing the net frame can keep pushing down simultaneously in proper order, guarantee to press the even pressfitting of lower surface of net frame at the upper surface of water mould. The utility model adopts a double-cylinder mechanism and adds the telescopic frame as a synchronous mechanism, the up-and-down movement of the net pressing frame is not influenced by whether the air pressure of an air source is stable, the friction force between the guide rod and the sliding frame and other factors, and the parallel and synchronous pressing of the net pressing frame on the water mould is ensured.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A paper mold forming device is characterized in that: the water mould pressing device comprises a rack, a water mould arranged on the rack, a net pressing frame arranged on the rack in a sliding manner, a first air cylinder with a first telescopic end and used for driving the net pressing frame to be close to or far away from the water mould, a second air cylinder with a second telescopic end and used for driving the net pressing frame to be close to or far away from the water mould, and a telescopic frame which is positioned between the rack and the net pressing frame and is connected with the rack and the net pressing frame; the first air cylinder and the second air cylinder are arranged on the rack at intervals, the expansion bracket is positioned between the first air cylinder and the second air cylinder, and the first expansion end and the second expansion end are respectively connected with the net pressing frame.

2. The paper mold forming device according to claim 1, wherein: the telescopic frame comprises a first rocker, a second rocker, a third rocker, a fourth rocker and a connecting seat; the first rocking bar and the second rocking bar are arranged at intervals and are parallel to each other, and the third rocking bar and the fourth rocking bar are arranged at intervals and are parallel to each other;

3. A paper mold forming apparatus as claimed in claim 2, wherein: the connecting seat comprises a first balance rod and a second balance rod; the first balance bar and the second balance bar are parallel to each other;

one end of the first balancing rod is pivoted with the first rocker, and the other end of the first balancing rod is pivoted with the second rocker; one end of the second balancing rod is pivoted with the third rocker, and the other end of the second balancing rod is pivoted with the fourth rocker.

4. A paper mold forming apparatus as claimed in claim 3, wherein: the connecting seat further comprises a plurality of first connecting rods, a plurality of second connecting rods and a plurality of third balance rods;

the first connecting rods are sequentially pivoted, a first preset included angle is formed between every two adjacent first connecting rods, the first connecting rod at one end is pivoted with the first rocker and forms a second preset included angle with the first rocker, and the first connecting rod at the other end is pivoted with the third rocker and forms a third preset included angle with the third rocker; the second connecting rods are sequentially pivoted, a fourth preset included angle is formed between every two adjacent second connecting rods, the second connecting rod at one end is pivoted with the second rocking rod and forms a fifth preset included angle with the second rocking rod, and the second connecting rod at the other end is pivoted with the fourth rocking rod and forms a sixth preset included angle with the fourth rocking rod; the first predetermined included angle, the second predetermined included angle, the third predetermined included angle, the fourth predetermined included angle, the fifth predetermined included angle and the sixth predetermined included angle are respectively greater than 0 degree and less than 90 degrees or greater than 90 degrees and less than 180 degrees;

5. The paper mold forming device according to claim 4, wherein: one end of the first connecting rod is pivoted with the first rocker through a first pivot, the other end of the first connecting rod is pivoted with the third rocker through a third pivot, one end of the second connecting rod is pivoted with the second rocker through a second pivot, the other end of the second connecting rod is pivoted with the fourth rocker through a fourth pivot, one end of the first balancing rod is pivoted with the first pivot, the other end of the first balancing rod is pivoted with the second pivot, one end of the second balancing rod is pivoted with the third pivot, and the other end of the second balancing rod is pivoted with the fourth pivot.

6. The paper mold forming device according to claim 5, wherein: the first balance bar is provided with a first limiting piece, and the second balance bar is provided with a second limiting piece; the first limiting piece is located on a rotating path of the first rocking bar or the second rocking bar, and the second limiting piece is located on a rotating path of the third rocking bar or the fourth rocking bar.

7. The paper mold forming device according to claim 6, wherein: the first rocker is provided with a first abutting seat for preventing the first rocker from being perpendicular to the first connecting rod, and when the first rocker and the first connecting rod tend to be perpendicular, the rack is positioned in the moving direction of the first abutting seat and abuts against the first abutting seat; the third rocker is provided with a second abutting seat for preventing the third rocker from being perpendicular to the second connecting rod; when the third rocker and the second connecting rod tend to be vertical, the screen pressing frame is positioned in the moving direction of the first abutting seat and abutted against the second abutting seat.

8. A paper pattern forming apparatus according to any one of claims 2 to 7, wherein: the machine frame comprises a base for placing the water mould, a guide rod arranged on the base and a cross beam arranged on the guide rod; the screen pressing frame is located between the base and the cross beam and is arranged on the guide rod in a sliding mode.

9. The paper mold forming device according to claim 8, wherein: the screen pressing frame is provided with a sliding frame which is arranged on the guide rod in a sliding mode; the third rocker and the fourth rocker are respectively pivoted with the sliding frame.

10. A paper mold forming apparatus as claimed in claim 9, wherein: the two guide rods are arranged at intervals, one end of the sliding frame is arranged on one guide rod in a sliding mode, the other end of the sliding frame is arranged on the other guide rod in a sliding mode, and the first air cylinder and the second air cylinder are located between the two guide rods respectively.