Slurry suction forming device and automatic paper-plastic product forming machine

Abstract

The pulp suction forming device comprises a pulp suction mold, a pulp suction mechanism and a water pumping pipe, a water tank is arranged in the pulp suction mold, the inner bottom of the water tank is provided with a convex part which extends towards the inner top, a gap is formed between the convex part and the inner top, the outer bottom of the pulp suction mold is connected with a mold, and the mold is connected with the pulp suction mechanism. A plurality of slurry suction holes are formed in the outer bottom of the slurry suction mold, one end of each slurry suction hole is communicated with the mold, and the other end of each slurry suction hole penetrates from the bottom of the slurry suction mold to the top end of the convex part along the convex part, so that slurry enters the water tank; the water pumping pipe penetrates through the inner top of the water tank from the outside of the pulp suction mold and extends towards the inner bottom of the water tank, and a gap is formed between the water pumping pipe and the inner bottom of the water tank. And the slurry suction mechanism is communicated with the water pumping pipe so as to suck slurry through the water pumping pipe. The water content of the wet blank can be reduced, the production efficiency is improved, and the production cost is reduced.

Description

[0001] Suction forming device and automatic forming machine for paper and plastic products Technical Field This invention relates to a paper-plastic product manufacturing equipment, and more particularly to a suction forming device and an automatic paper-plastic product forming machine. Background Technology

[0002] In the processing of paper-plastic products, a suction mold is typically immersed in slurry. A vacuum is then created in the mold, drawing in the slurry. After filtration, the pulp medium remains in the mold, while the water is drained away through the mold and pipes. Finally, the mold forms the wet preform of the paper-plastic product. In this process, suction stops after forming. However, some slurry remains in the suction pipes. This slurry, under the influence of gravity, flows back onto the suction mold and the wet preform after the negative pressure is removed. This results in a large amount of slurry remaining in the mold and preform, affecting the moisture content of the wet preform. Excessive moisture content prolongs the drying time, reducing production efficiency.

[0003] Therefore, the existing method for removing slurry from the suction mold and the wet blank involves using a flipping drive mechanism to flip the suction mold after suction is completed but before demolding, thus emptying the slurry stored on the mold and the wet blank and reducing the moisture content of the wet blank. However, this method requires additional equipment such as a flipping mechanism, increasing the size and cost of the equipment. It also requires an additional step of flipping and emptying the water during processing, and after emptying the water, a certain amount of time needs to be waited for the water to drain completely, extending the processing time and greatly reducing production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a slurry forming device that can reduce the moisture content of wet blanks, improve production efficiency, and reduce production costs.

[0005] Another objective of this invention is to provide an automatic forming machine for paper and plastic products that can reduce the moisture content of wet blanks, improve production efficiency, and reduce production costs.

[0006] To achieve the above objectives, the present invention provides a slurry suction molding device, comprising a slurry suction mold, a slurry suction mechanism, and a water suction pipe. The slurry suction mold has a water tank inside, and a protrusion extending inward and upward from the inner bottom of the water tank, with a gap between the protrusion and the inner top. The outer bottom of the slurry suction mold is connected to a mold, and the outer bottom of the slurry suction mold has multiple slurry suction holes. One end of each suction hole communicates with the mold, and the other end extends from the bottom of the slurry suction mold along the protrusion to the top of the protrusion, allowing slurry to enter the water tank. The water suction pipe extends from the outside of the slurry suction mold through the inner top of the water tank and toward the inner bottom of the water tank, with a gap between the water suction pipe and the inner bottom of the water tank. The slurry suction mechanism is connected to the water suction pipe to suction slurry through the water suction pipe.

[0007] Compared to existing technologies, this method utilizes a suction mold with a water tank inside. A protrusion at the bottom of the water tank, with suction holes connecting the inside and outside, allows for suction of slurry, thus forming a wet blank on the mold. Furthermore, a drainage pipe extends from the outside of the suction mold through the top of the water tank and towards its bottom. This pipe and suction mechanism extract slurry from the tank, ensuring rapid drainage even after forming. This keeps the water level in the tank below the suction holes at the top of the protrusion, preventing backflow and ensuring the wet blank's moisture content is effectively reduced. Moreover, it eliminates the need for traditional tipping and draining methods, accelerating water removal, shortening the wet blank's residence time, improving production efficiency, and effectively reducing production costs.

[0008] Specifically, the pumping pipe is equipped with a switch valve. By controlling the switch valve, the start and stop of water pumping by the pumping pipe can be controlled.

[0009] Specifically, the horizontal height of the outlet of the suction hole at the top of the protrusion is greater than the horizontal height of the inlet at the bottom of the pumping pipe. This ensures that the pumping pipe can effectively pump water and prevents the slurry from flowing back into the wet billet at the suction hole, thus affecting the moisture content of the wet billet.

[0010] Specifically, the volume obtained by multiplying the height difference between the outlet of the suction hole at the top of the protrusion and the inlet at the bottom of the pumping pipe and the area of ​​the water tank is greater than or equal to the pipe volume between the inlet at the bottom of the pumping pipe and the switch valve. This ensures that after the switch valve is closed, the liquid level of the slurry flowing back into the water tank from the pumping pipe will not exceed the suction hole at the top of the protrusion, thereby preventing the slurry from flowing back into the wet billet through the suction hole and avoiding an increase in the moisture content of the wet billet.

[0011] Specifically, the suction mold includes a main body and a top cover. The main body has an inwardly recessed structure, and the top cover is sealed to the main body to form the water tank.

[0012] Specifically, the slurry suction molding device also includes a drain pipe, which is located on one side of the slurry suction mold and communicates with the water tank. The drain pipe is equipped with a drain valve. Through the drain pipe, residual liquid in the water tank can be automatically drained when the machine is stopped, preventing the slurry from staying in the water tank for too long and becoming smelly.

[0013] Specifically, the suction molding device further includes a cleaning mechanism. The inner top of the suction mold is provided with a cleaning nozzle that communicates with the water tank. The cleaning mechanism is connected to the cleaning nozzle to clean the inside of the mold.

[0014] Specifically, a groove is formed in the inner bottom of the water tank, and the lower end of the pumping pipe extends into the groove and is spaced apart from the inner bottom surface of the groove. The groove can collect the slurry in the water tank, which facilitates the pumping pipe to quickly remove it, shortening the drainage time and improving efficiency.

[0015] An automatic forming machine for paper-plastic products includes a frame and a slurry suction drive device, a slurry tank, and a slurry suction forming device disposed on the frame. The slurry suction forming device is movably disposed above the slurry tank. The slurry tank stores slurry. The slurry suction drive device drives the slurry suction forming device to move downward so that the mold is immersed in the slurry tank to absorb the slurry, thereby forming a wet blank of the paper-plastic product.

[0016] Specifically, a guiding mechanism is provided between the suction molding device and the frame. The guiding mechanism includes guide posts distributed around the suction mold and guide sleeves disposed on the frame. The guide posts are slidably fitted onto the guide sleeves. The guiding mechanism allows the suction molding device to move more smoothly up and down. Attached Figure Description

[0017] Figure 1 This is a perspective view of the automatic paper-plastic product forming machine of the present invention.

[0018] Figure 2 This is a side view of the automatic paper-plastic product forming machine of the present invention.

[0019] Figure 3 This is a perspective view of the suction forming device of the automatic paper-plastic product forming machine of the present invention.

[0020] Figure 4 This is a side view of the suction forming device of the automatic paper-plastic product forming machine of the present invention.

[0021] Figure 5This is an exploded view of the suction forming device of the automatic paper-plastic product forming machine of the present invention.

[0022] Figure 6 This is a bottom view of the disassembled suction forming device of the automatic paper-plastic product forming machine of the present invention.

[0023] Figure 7 This is a cross-sectional view of the suction forming device of the automatic paper-plastic product forming machine of the present invention.

[0024] Figure 8 This is a perspective view of the cleaning device of the automatic paper-plastic product forming machine of the present invention.

[0025] Figure 9 This is a perspective view of the cold pressing device of the automatic paper-plastic product forming machine of the present invention.

[0026] Figure 10 This is a perspective view of the upper hot press mold of the hot press device of the automatic paper-plastic product forming machine of the present invention.

[0027] Figure 11 This is an exploded view of the upper hot press mold of the hot press device of the automatic paper-plastic product forming machine of the present invention.

[0028] Figure 12 This is a perspective view of the lower hot pressing mold and the feeding mechanism of the hot pressing device of the automatic paper-plastic product forming machine of the present invention.

[0029] Figure 13 This is a side view of the lower hot press mold and the feeding mechanism of the hot press device of the automatic paper-plastic product forming machine of the present invention.

[0030] Figure 14 This is a bottom perspective view of the lower hot pressing mold and the feeding mechanism of the hot pressing device of the automatic paper-plastic product forming machine of the present invention.

[0031] Figure 15 This is an exploded view of the lower hot pressing mold and the feeding mechanism of the hot pressing device of the automatic paper-plastic product forming machine of the present invention. Detailed Implementation

[0032] To illustrate the technical content, structural features, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0033] like Figure 1 and Figure 2As shown, the automatic paper-plastic product forming machine 100 disclosed in this invention includes a frame 2 and a slurry suction forming device 1, a slurry suction driving device 3, a slurry tank 4, a cold pressing device 5, a cold pressing driving device 6, a hot pressing device 7, a first hot pressing driving device 8, a second hot pressing driving device 9, and a water suction device 10, all mounted on the frame 2. The slurry tank 4 is located on the lower side of the frame 2. The slurry suction forming device 1 is vertically movable above the slurry tank 4 and connected to a mold 200, which can form the shape of a paper-plastic product. The slurry suction driving device 3 drives the slurry suction forming device 1 to move up and down. When the slurry suction forming device 1 moves the mold 200 downwards, the mold 200 can be immersed in the slurry tank 4 to suck slurry. After the slurry passes through the mold 200, the slurry remains on the mold 200, while the water is filtered out by the mold 200, thus forming a wet blank of the paper-plastic product within the mold 200. The cold pressing device 5 is laterally movable and positioned on one side of the suction forming device 1. The cold pressing drive device 6 drives the cold pressing device 5 to move laterally below the suction forming device 1, so that when the suction forming device 1 moves the mold 200 downwards towards the cold pressing device 5, it works with the mold 200 to cold press the wet blank, thereby squeezing out the water from the wet blank. The hot pressing device 7 is positioned on the other side of the suction forming device 1, with the hot pressing device 7 and the cold pressing device 5 located on opposite sides of the suction forming process. The hot pressing device 7 includes an upper hot pressing mold 71 and a lower hot pressing mold 72. The upper hot pressing mold 71 is slidably positioned vertically, and the lower hot pressing mold 72 is slidably positioned laterally. The second hot pressing drive device 9 drives the lower hot pressing mold 72 to move between the area below the suction forming device 1 and the area below the upper hot pressing mold 71, so as to receive the wet blank on the suction forming device 1 and move the wet blank below the upper hot pressing mold 71. The first hot-pressing drive device 8 drives the upper hot-pressing mold 71 to move downwards, so that the upper hot-pressing mold 71 and the lower hot-pressing mold 72 work together to hot-press and dry the wet blank, forming a dry blank. The negative pressure providing device 10 is connected to the cold-pressing device 5, the upper hot-pressing mold 71, and the lower hot-pressing mold 72 respectively, to absorb the water squeezed out from the wet blank. The slurry suction drive device 3, the cold-pressing drive device 6, the first hot-pressing drive device 8, and the second hot-pressing drive device 9 are all cylinders.

[0034] Please see Figures 3 to 7The slurry suction forming device 1 includes a slurry suction mold 11, a slurry suction mechanism 12, and a water suction pipe 13. The slurry suction mold 11 has a water tank 111 inside, and the inner bottom of the water tank 111 has a protrusion 112 extending inward to the top with a gap between it and the top. The outer bottom of the slurry suction mold 11 is connected to the mold 200, and the outer bottom of the slurry suction mold 11 has multiple slurry suction holes 113. One end of each suction hole 113 communicates with the mold 200, and the other end extends from the bottom of the slurry suction mold 11 along the protrusion 112 to the top of the protrusion 112, thus communicating with the water tank 111, allowing the slurry to pass through the mold 200 and the suction holes 113 into the water tank 111. The water suction pipe 13 extends from the outside of the slurry suction mold 11, through the inner top of the water tank 111, and towards the inner bottom of the water tank 111. There is a gap between the lower end of the pumping pipe 13 and the inner bottom of the water tank 111. The slurry suction mechanism 12 is connected to the pumping pipe 13 to suction slurry through the pumping pipe 13. The pumping pipe 13 is equipped with a switch valve 14. Specifically, there can be multiple pumping pipes 13 extending into the interior of the water tank 111, distributed throughout the water tank 111, thereby quickly and evenly pumping away the slurry in the water tank 111. The multiple pumping pipes 13 finally converge into a main pumping pipe 13a, from which the slurry is output. The switch valve 14 is located on the main pumping pipe 13a. By controlling the switch valve 14, the start and stop of pumping water from the pumping pipe 13 can be controlled. By setting a slurry suction mold 11, a water tank 111 is set inside the slurry suction mold 11, and a protrusion 112 is set at the inner bottom of the water tank 111. A slurry suction hole 113 connecting the inside and outside is opened on the protrusion 112, so that slurry can be sucked through the slurry suction hole 113, thereby achieving the purpose of forming a wet blank on the mold 200. Furthermore, by setting a water suction pipe 13, which passes through the inner top of the water tank 111 from the outside of the slurry suction mold 11 and extends towards the inner bottom of the water tank 111, the water suction pipe 13 and the slurry suction mechanism 12 can extract the slurry in the water tank 111. Thus, after the forming is completed, the water in the slurry suction mold 11 can continue to be quickly discharged, so that the water level in the water tank 111 is lower than the slurry suction hole 113 at the top of the protrusion 112, preventing water from flowing back into the mold 200 from the slurry suction hole 113 and affecting the wet blank. Therefore, the moisture content of the wet blank is effectively reduced. Furthermore, the traditional method of tipping and pouring water is eliminated, accelerating water removal, shortening the residence time of wet blanks, thereby improving production efficiency and effectively reducing production costs. The slurry suction mechanism 12 is a water pump. In addition, a groove 114 is provided at the bottom of the water tank 111, and the lower end of the water suction pipe 13 can extend slightly into the groove 114 and be spaced apart from the inner bottom surface of the groove 114. The groove 114 can collect the slurry in the water tank 111, which is conducive to the water suction pipe 13 quickly pumping away the slurry, shortening the drainage time and improving efficiency.

[0035] The horizontal height of the outlet of the suction hole 113 at the top of the protrusion 112 is greater than the horizontal height of the inlet at the bottom of the pumping pipe 13. This ensures that the pumping pipe 13 can effectively pump water, preventing slurry from flowing back into the wet blank at the suction hole 113 and affecting the moisture content of the wet blank. The volume obtained by multiplying the height difference between the outlet of the suction hole 113 at the top of the protrusion 112 and the inlet at the bottom of the pumping pipe 13 and the area of ​​the water tank 111 is greater than or equal to the total volume of all pipes from the inlet at the bottom of the pumping pipe 13 to the switch valve 14. This ensures that after the switch valve 14 is closed, the height of the slurry in the pumping pipe 13 flowing back into the water tank 111 will not exceed the height of the suction hole 113 at the top of the protrusion 112, thus preventing slurry from flowing back into the wet blank through the suction hole 113 and avoiding an increase in the moisture content of the wet blank.

[0036] For example Figures 5 to 7 As shown, the suction mold 11 includes a main body 11a and a top cover 11b. The main body 11a has an inwardly recessed structure, and the top cover 11b is sealed to the main body 11a to form the water tank 111. Specifically, a guide mechanism 120 is provided between the suction molding device 1 and the frame 2. The guide mechanism 120 includes guide posts 121 distributed around the top cover 11b of the suction mold 11 and guide sleeves 122 disposed on the frame 2. There are four guide posts 121, distributed at the four corners of the top cover 11b. The guide posts 121 correspond one-to-one and are slidably sleeved on the guide sleeves 122. The guide mechanism 120 makes the upward and downward movement of the suction molding device 1 more stable. The suction drive device 3 is a cylinder, which is mounted on the frame 2. The output end of the cylinder extends downward and is connected to the top cover 11b of the suction mold 11 to drive the suction mold 11 to move vertically.

[0037] Please see again Figure 5 The suction molding device 1 further includes a drain pipe 15, which is located on one side of the suction mold 11 and communicates with the water tank 111. A drain valve 16 is provided on the drain pipe 15. Through the drain pipe 15, residual liquid in the water tank 111 can be automatically drained when the machine is stopped, preventing the slurry from remaining in the water tank 111 for too long and developing an odor. Specifically, the suction molding device 1 also includes a cleaning mechanism 17. A cleaning nozzle 115 communicating with the water tank 111 is provided on the inner top of the suction mold 11. The cleaning mechanism 17 is connected to the cleaning nozzle 115 to clean the inside of the mold 200.

[0038] Please see Figure 8The automatic paper-plastic product molding machine 100 also includes a cleaning device 130 and a cleaning drive device 140. The cleaning device 130 is laterally movable and positioned on one side of the suction molding device 1, above the cold pressing device 5. When the suction molding device 1 lifts the mold 200, the cleaning drive device 140 drives the cleaning device 130 to move below the suction molding device 1 to clean the mold 200. The cleaning drive device 140 can be a motor-driven lead screw nut, a cylinder, or a motor-driven gear and rack, all of which can achieve the translation of the cleaning device 130. By setting the cleaning device 130, the mold 200 can be cleaned after each wet blank is molded, ensuring that there are no residues or residual liquids in the mold 200 that would affect the next molding, thus improving product quality. Specifically, the cleaning device 130 includes a frame 131 with an upward opening, and the output end of the cleaning drive device 140 is fixedly connected to the frame 131. The frame 131 is surrounded by brushes 132 for cleaning the mold 200. By providing brushes 132, on the one hand, the brushes 132 can prevent water droplets from splashing impurities during high-pressure water cleaning of the mold, thereby effectively collecting impurities into the frame; on the other hand, they can brush away residual liquid from the bottom surface of the mold 200. Of course, in some embodiments, the frame 131 may also have multiple scraper blades 133 arranged inside to scrape the mold 200. The scraper blades 133 can scrape away residue from the bottom surface of the mold 200, thereby ensuring the cleanliness of the mold 200. More specifically, a guide rod 141 is provided on one side of the frame 131, and a guide sleeve 142 is provided on the frame 2. The guide rod 141 slides through the guide sleeve 142. The guide rod 141 and the guide sleeve 142 are configured to make the translation of the frame 131 more stable.

[0039] Please see Figure 9 The cold pressing device 5 includes a cold pressing mold 51, a base 52, and a cold pressing pipe 53. The base 52 is laterally movable on the frame 2. The output end of the cold pressing drive device 6 is connected to the base 52. The cold pressing mold 51 is disposed on the base 52 and has a drainage hole 511 in the middle. The cold pressing pipe 53 is disposed on the base 52 and communicates with the drainage hole 511. By using the cold pressing mold 51 and the mold 200 to jointly extrude the wet blank, the water in the wet blank can be quickly squeezed out. This can shape the wet blank and speed up the subsequent drying time, thereby improving production efficiency.

[0040] Please see again Figures 10 to 15The upper hot press mold 71 includes an upper connecting frame 711, an upper template 712, a first heating rod 713, and a first pipe 714. The first heating rod 713 is disposed inside the upper template 712, and the upper template 712 is disposed on the upper connecting frame 711. The upper template 712 has a plurality of upper through holes 7121 penetrating the upper and lower sides. The first pipe 714 is connected to the upper through holes 7121 and the negative pressure providing device 10 respectively, so as to absorb moisture through the upper through holes 7121 during hot pressing, and at the same time provide negative pressure to hold the wet blank. The lower hot press mold 72 includes a lower connecting seat 721, a lower template 722, a second heating rod 723, and a second pipe 724. The lower connecting seat 721 is movably mounted on the frame 2. The lower template 722 is mounted on the lower connecting seat 721. The lower template 722 has multiple through holes 7221 that pass through the upper and lower sides. The second pipe 724 is connected to the through holes 7221 and the negative pressure providing device 10, respectively, so as to absorb water vapor through the through holes 7221 during hot pressing.

[0041] Please see again Figure 12 and Figure 15 The automatic paper-plastic product forming machine 100 also includes a feeding mechanism 150. The feeding mechanism 150 is located on the side of the lower hot press mold 72 away from the suction forming device 1 and moves with the lower hot press mold 72. The feeding mechanism 150 receives the dry blank from the upper hot press mold 71 when the lower hot press mold 72 receives the wet blank from the suction forming device 1. The feeding mechanism 150 can automatically feed the dry blank, improving the degree of automation and production efficiency. Specifically, the feeding mechanism 150 includes a material tray 151, a cylinder 152, and a frame 153. The frame 153 is fixedly connected to one side of the lower hot press mold 72. One end of the material tray 151 is pivotally connected to one side of the frame 153. One end of the cylinder is pivotally connected to the other side of the frame 153. The output end of the cylinder 152 is pivotally connected to the other end of the material tray 151 to drive the material tray 151 to flip outward.

[0042] This solution utilizes the aforementioned automatic paper-plastic forming machine to form paper-plastic products, and includes the following steps: The suction drive device is used to move the suction mold and the mold into the slurry pool; A slurry suction mechanism is used to draw slurry into the slurry pool, so as to form a wet blank in the mold; The wet blank is squeezed by the cold pressing device and the mold to remove moisture; The lower hot press die is driven by the second hot press drive device to receive the wet blank from the mold and to transfer the wet blank to the bottom of the upper hot press die; The upper and lower hot press molds are driven by the first hot press driving device to clamp the wet blank together and heat and dry the wet blank to form a dry blank; The blank is cut using a feeding mechanism.

[0043] Based on the above and in conjunction with the accompanying drawings, the working principle of the present invention will be described in detail below: During the molding of paper-plastic products, firstly, the suction drive device 3 drives the suction mold 11 and the mold 200 downwards, immersing the mold 200 in the slurry of the slurry tank 4. At this time, the suction mechanism 12 provides negative pressure to the water tank 111 through the water extraction pipe 13, creating negative pressure on the mold 200 surface, thereby sucking up the slurry. After the slurry enters the mold 200 and is filtered, the slurry remains in the mold 200, while the water enters the suction hole 113 after passing through the mold 200, and then enters the water tank 111 from the top of the protrusion 112. Afterwards, the water enters the suction mechanism 12 through the water extraction pipe 13 and is discharged. After a period of suction, a wet blank of the paper-plastic product is formed in the mold 200. At this time, the suction drive device 3 drives the suction mold 11 and the mold 200 upwards away from the slurry tank 4, and the suction mechanism 12 continues to suck water from the water tank 111 until the suction is complete and the operation stops. At this time, there is still some water in the suction pipe 13. After the negative pressure is lost, this water will flow back into the water tank 111 from the suction hole due to gravity. Since the suction hole 113 is located at the top of the protrusion 112, the backflowing water cannot flow back to the wet blank through the suction hole 113, and therefore can only be stored in the water tank 111. Finally, before stopping the machine, open the drain pipe 15 to drain the remaining water in the water tank 111. If necessary, clean water can be injected from the cleaning nozzle through the cleaning mechanism 17 to clean the inside of the water tank 111 and then discharged from the drain pipe 15.

[0044] After the wet blank is formed, the cold pressing drive device 6 drives the cold pressing device 5 to move below the suction forming device 1. At this time, the suction driving device 3 drives the mold 200 and the wet blank to move downward, so that the mold 200 and the cold pressing mold 51 jointly press the wet blank, thereby squeezing out the water in the wet blank. Afterward, the suction driving device 3 drives the mold 200 and the wet blank to rise. Since the suction mechanism 12 is still in working state at this time, the wet blank can be held on the mold 200. At the same time, the cold pressing drive device 6 drives the cold pressing device 5 to reset. Next, the second hot pressing drive device 9 drives the lower hot pressing mold 72 to move below the suction forming device 1. The suction driving device 3 drives the mold 200 and the wet blank to move downward, so that the mold 200 is close to the lower hot pressing mold 72. At this time, the suction mechanism 12 stops working, and the wet blank falls onto the lower hot pressing mold 72 under the action of gravity. Subsequently, the second hot-press driving device 9 drives the lower hot-press mold 72 to move below the upper hot-press mold 71, and the cleaning driving device 140 drives the cleaning device 130 to move below the mold 200 to clean the mold 200. Then, the slurry suction forming device 1 descends again into the slurry pool 4 for a second forming. At the same time, the first hot-press driving device 8 drives the upper hot-press mold 71 to descend until the upper hot-press mold 71 and the lower hot-press mold 72 jointly press the wet blank. Since the upper hot-press mold 71 and the lower hot-press mold 72 are preheated, they jointly heat and dry the wet blank, causing the wet blank to dry into a dry blank. When the upper hot press mold 71 is reset upward, the first hot press driving device 8 drives the lower hot press mold 72 and the unloading mechanism 150 to move, so that the unloading mechanism 150 is located below the upper hot press mold 71. At this time, the negative pressure providing device 10 connected to the upper hot press mold 71 no longer provides negative pressure to the upper hot press mold 71, so that the dry blank falls onto the material tray 151. The cylinder 152 pushes the material tray 151 to flip, thereby unloading the dry blank.

[0045] Compared with the prior art, the present invention, by setting up a slurry suction forming device 1 and a slurry suction driving device 3, enables the slurry suction forming device 1 to suction slurry from the slurry pool 4 and form a wet blank. Furthermore, by setting up a cold pressing device 5, which is driven laterally by a cold pressing driving device 6 to be positioned below the slurry suction forming device 1, water can be squeezed out of the wet blank, thereby reducing its moisture content. Then, by setting up a hot pressing device 7, the lower hot pressing mold 72 is moved under the slurry suction forming device 1 by a second hot pressing driving device 9 to receive the wet blank, thus allowing the wet blank to be transferred... The wet blank is moved to the upper hot press mold 71, and then the first hot press drive device 8 can drive the upper hot press mold 71 and the lower hot press mold 72 to jointly hot press and dry the wet blank, finally forming a dry blank. In the whole process, the wet blank does not need to be transferred laterally to each device. Instead, each device moves laterally to the suction forming device 1 to work. This avoids the wet blank moving laterally and causing the slurry to drip onto the equipment below, affecting the operation of the equipment, improving production efficiency, reducing production costs, and avoiding the oil stains from the equipment driving the movement of the wet blank from pouring down and contaminating the slurry, which would affect the quality of the product.

[0046] The structure of the negative pressure providing device 10 involved in the automatic paper-plastic product forming machine 100 of the present invention is well known to those skilled in the art, and will not be described in detail here.

[0047] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the scope of the present invention are still within the scope of the present invention.

Claims

1. A suction forming device, characterized by: The suction mold is internally provided with a water tank, the inner bottom of the water tank is provided with a convex portion extending to the inner top and having a gap therebetween, the outer bottom of the suction mold is connected with the mold, the outer bottom of the suction mold is provided with a plurality of suction holes, one end of the suction hole is communicated with the mold and the other end penetrates the bottom of the suction mold along the convex portion to the top end of the convex portion so that the slurry enters the water tank, the water suction pipe is arranged from the outside of the suction mold through the inner top of the water tank and extends towards the inner bottom of the water tank, the water suction pipe has a gap with the inner bottom of the water tank, and the suction mechanism is communicated with the water suction pipe to suck the slurry through the water suction pipe.

2. The slurry suction forming apparatus according to claim 1, characterized by: The water suction pipe is provided with an on-off valve.

3. The slurry suction forming apparatus according to claim 2, wherein: The horizontal height of the outlet of the suction hole at the top end of the convex portion is greater than the horizontal height of the inlet at the bottom end of the water suction pipe.

4. The slurry suction forming apparatus according to claim 3, wherein: The product of the height difference between the outlet of the suction hole at the top end of the convex portion and the inlet at the bottom end of the water suction pipe and the area of the water tank is greater than or equal to the volume of the pipeline between the inlet at the bottom end of the water suction pipe and the on-off valve.

5. The slurry suction forming apparatus as claimed in claim 1, wherein: The suction mold comprises a main body and a top cover, the main body is concave inwardly, and the top cover is sealingly covered on the main body to form the water tank.

6. The slurry suction forming apparatus as claimed in claim 1, wherein: The suction forming device further comprises a drain pipe arranged on one side of the suction mold and communicated with the water tank, and the drain pipe is provided with a drain valve.

7. The slurry suction forming apparatus according to claim 6, characterized by: The suction forming device further comprises a cleaning mechanism, the inner top of the suction mold is provided with a cleaning nozzle communicated with the water tank, and the cleaning mechanism is connected with the cleaning nozzle to clean the inside of the mold.

8. The slurry suction forming apparatus as claimed in claim 1, wherein: The inner bottom of the water tank is provided with a groove, the lower end of the water suction pipe extends into the groove and is arranged in a gap with the inner bottom surface of the groove.

9. An automatic paper-plastic article forming machine, characterized by: The suction forming device comprises a rack, a suction driving device, a slurry pool and the suction forming device according to any one of claims 1 to 8, the suction forming device is movably arranged above the slurry pool, the slurry pool stores slurry, the suction driving device drives the suction forming device to move downwardly so that the mold is immersed in the slurry pool to suck the slurry and form a wet blank of paper plastic product.

10. The automatic paper plastic article forming machine according to claim 9, characterized in that: A guide mechanism is arranged between the suction forming device and the rack, the guide mechanism comprises guide columns distributed around the suction mold and guide sleeves arranged on the rack, the guide columns are one-to-one corresponding and slidingly sleeved on the guide sleeves.

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