Forming process and forming equipment for a disposable dinner plate

Abstract

The present invention discloses a forming process and forming equipment for a disposable dinner plate, comprising the following steps: S01. Material preparation: drying the sheet material at 125-130°C in a dehumidifying environment for 1-2 hours; S02. Preheating: laying the dried sheet material flat and preheating both sides, and then transporting it to a heating device; S03. Heating: heating and softening the preheated sheet material by hot air on both sides, and transporting it to a mold; S04. Shaping: preheating the bearing mold in advance, and after preheating, closing the mold with an air delivery mold to form a closed space. Specifically, it relates to plastic forming equipment. The invention reduces humidity by preheating the sheet material, thereby reducing the bubbles generated by water evaporation during the heating process, so as to avoid the tearing situation due to the weakness of the bubbles when fitting the rounded corners and separating, and softens the sheet material by hot air on both sides to make the rounded corners fit, thus avoiding depression.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molding, and specifically relates to a forming process and forming equipment for disposable dinner plates. Background Art

[0002] Disposable dinner plates are mostly made of plastic, and the thermoforming process is applied to disposable dinner plates due to advantages such as high production efficiency and low rejection rate.

[0003] According to the patent number CN116367758A, publication (announcement) date: June 30, 2023, a composite thermoformed tableware and its preparation method are disclosed. The preparation method of the composite thermoformed tableware includes a preheating step, a composite step, and a thermoforming step in sequence; the preheating step includes heating multi-layer forming materials at a temperature of 35°C to 150°C, and the forming materials include one or at least two of paper, plastic, and an inorganic layer; the composite step: stacking the preheated forming materials to form a composite material; the thermoforming step includes hot-pressing the composite material at a temperature of 80°C to 150°C and a pressure of 0.05 MPa to 0.5 MPa to form a three-dimensional shaped blank. The tableware forms a composite structure through thermoforming of multi-layers of the same material or different materials, making the thickness and strength of the tableware higher. This method has a simple operation process, avoids complex and cumbersome processes, and better controls production costs.

[0004] According to the patent number CN209257366U, publication (announcement) date: August 16, 2019, a forming machine for producing disposable high-molecular plastic tableware is disclosed, which relates to the technical field of forming machines. The forming machine for producing disposable high-molecular plastic tableware includes a top plate and a bottom plate. A guide post is fixedly installed at the bottom of the top plate, a guide sleeve is fixedly installed at the top of the bottom plate, an upper die base is fixedly installed at the bottom of the top plate, an injection molding pipe is fixedly installed at the top of the upper die base, a feed channel is fixedly installed at the bottom end of the injection molding pipe, an upper die cavity is opened at the bottom of the upper die base, and overflow cavities are opened on both sides of the inner wall of the upper die cavity. In this forming machine for producing disposable high-molecular plastic tableware, raw materials are fed into the upper die cavity through the injection molding pipe. When the raw materials reach a certain quantity, the injection molding pipe is completely closed by the rising of a disc, and the excess raw materials are extruded into the overflow cavity. After opening the cavity, the raw materials in the overflow cavity can be recycled, avoiding waste of raw materials and reducing production costs.

[0005] In the prior art including the above patents, multiple depressions for holding dishes are provided in disposable dinner plates. Therefore, when designing the mold, multiple rounded corners are designed at the rib plates between two depressions for transition. However, because the rounded corners at both ends of the rib plate are too close, it is easy to cause the sheet material not to deform repeatedly and perfectly fit the rounded corners, easily forming depressions or tears. Summary of the Invention

[0006] The purpose of the present invention is to provide a forming process and forming equipment for disposable dinner plates, aiming to solve the above problems.

[0007] In order to achieve the above purpose, the present invention provides the following technical solution: A forming process for disposable dinner plates, including the following steps:

[0008] S01. Material preparation: The sheet material is dried at 125 - 130 °C in a dehumidifying environment for 1 - 2 h;

[0009] S02. Preheating: The dried sheet material is laid flat and preheated on both sides, and then transported to the heating equipment;

[0010] S03. Heating: The preheated sheet material is heated and softened by hot air on both sides and transported to the mold;

[0011] S04. Shaping: The carrying mold is preheated in advance. After preheating, it is combined with the air - conveying mold to form a closed space. The air - conveying mold outputs gas to drive the sheet material to fit the inner wall of the carrying mold. Subsequently, the carrying mold is cooled and the mold is opened to obtain a connecting component;

[0012] S05. Cutting: The formed connecting component moves to the cutting tool head and is cut to obtain the finished product.

[0013] A forming equipment for disposable dinner plates, which is used to implement step S04 in the above process, includes a hot - pressing mold. The hot - pressing mold includes a carrying mold and an air - conveying mold. The carrying mold is provided with:

[0014] A mold cavity, on the outer layer of which there is a hot - flow pipeline, and a cooling pipeline is arranged in the hot - flow pipeline;

[0015] An auxiliary pushing mechanism, which includes a push slider slidably connected to the rounded corner of the mold cavity. The push slider switches between the following two working positions:

[0016] The first working position: The push slider slides as the hot - flow pipeline is ventilated and retracts to the rounded corner;

[0017] The second working position: The push slider slides as the cooling pipeline conveys gas and extends into the mold cavity.

[0018] Preferably, the auxiliary pushing mechanism further includes a sliding air chamber arranged in the hot - flow pipeline. The push slider is slidably connected to the sliding air chamber. A Venturi tube is arranged on the sliding air chamber. An air outlet channel is opened in the hot - flow pipeline, and the Venturi tube is coaxially arranged in the air outlet channel.

[0019] Preferably, an air - collecting pipe is opened in the push slider. The air - collecting pipe is docked with the Venturi tube to extract air when the push slider switches to the first working position.

[0020] Preferably, a limiting column is arranged in the sliding air chamber, an air passage is formed in the limiting column, clamping plates are symmetrically arranged on the push slider along the air collecting pipe, and the clamping plates move along with the push slider and are clamped on the limiting column to communicate the air passage and the air collecting pipe.

[0021] Preferably, a cold end air inlet fixedly communicated with the cooling pipeline is formed in the sliding air chamber, and the cooling pipeline conveys air into the sliding air chamber to overcome the clamping force of the clamping plates and drive the push slider to switch to the second working position.

[0022] Preferably, an arc-shaped rotating plate is rotatably connected to one end of the push slider, an air outlet pipe is formed in the push slider, a butt joint air port is formed in the arc-shaped rotating plate, and the arc-shaped rotating plate flips along with the switching of the working position of the push slider to drive the butt joint air port to be fixedly communicated with the air collecting pipe or the air outlet pipe.

[0023] Preferably, a spring is arranged between the arc-shaped rotating plate and the push slider, and the spring pulls the arc-shaped rotating plate to flip towards the inner wall of the mold cavity.

[0024] Preferably, a plurality of branch air pipes are formed in the cooling pipeline, and the branch air pipes discharge air to the outside.

[0025] Preferably, a sealing plate is arranged on the clamping plate, and the clamping plate is decoupled from the limiting column to drive the two sealing plates to fit and seal the air collecting pipe.

[0026] In the above technical solution, a forming process and a forming device for a disposable dinner plate provided by the present invention have the following beneficial effects: by preheating the sheet material to reduce the humidity, the bubbles generated by the evaporation of moisture during the heating process are reduced, so as to avoid the situation that the sheet material tears due to the weakness of the bubbles when fitting and separating the rounded corners, and the sheet material is softened by double-sided hot air to make the rounded corners fit, thereby avoiding depression. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0028] Figure 1 It is a schematic overall view provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic view of a bearing mold provided by an embodiment of the present invention;

[0030] Figure 3Explosion schematic diagram of the hot pressing die provided by the embodiment of the present invention;

[0031] Figure 4 Overall sectional schematic diagram provided by the embodiment of the present invention;

[0032] Figure 5 For Figure 4 Enlarged schematic diagram at position A in

[0033] Figure 6 Explosion schematic diagram of the auxiliary pushing mechanism provided by the embodiment of the present invention;

[0034] Figure 7 For Figure 6 Enlarged schematic diagram at position B in

[0035] Figure 8 Schematic diagram of the arc rotating plate provided by the embodiment of the present invention;

[0036] Figure 9 Transparent schematic diagram of the pushing slider provided by the embodiment of the present invention;

[0037] Figure 10 Schematic diagram of the cooling pipeline provided by the embodiment of the present invention;

[0038] Figure 11 Sectional schematic diagram of the cooling pipeline provided by the embodiment of the present invention.

[0039] Explanation of reference numerals:

[0040] 1. Hot pressing die; 11. Carrying die; 111. Mold cavity; 112. Cooling pipeline; 1121. Bifurcated air pipe; 113. Heat flow docking hole; 114. Heat flow pipeline; 115. Air outlet channel; 12. Air conveying die; 121. Pressure air hole; 122. Guide hole; 13. Guide post; 2. Sheet material; 3. Pressure pipe; 4. Auxiliary pushing mechanism; 41. Pushing slider; 410. Air collecting pipe; 411. Air outlet pipe; 42. Sliding air chamber; 421. Cold end air inlet; 422. Venturi tube; 43. Arc rotating plate; 431. Depressed part; 432. Docking air port; 44. Spring; 45. Clamping plate; 451. Sealing plate; 46. Limiting post; 461. Air passage. Detailed implementation manners

[0041] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0042] Example 1

[0043] A forming process for a disposable dinner plate, comprising the following steps:

[0044] S01. Material preparation: The sheet 2 with a thickness of 0.5 mm is dried in a dehumidifying environment at 125 - 130 °C for 1 - 2 h. When the thickness of the sheet 2 exceeds 1.2 mm, the drying time needs to be increased to 6 - 8 h, and the temperature of the dehumidifying environment remains at 125 - 130 °C;

[0045] S02. Preheating: The dried sheet 2 is laid flat and preheated on both sides. The preheating is carried out by blowing hot air at a temperature of 100 - 110 °C directly, and then it is transported to the heating equipment;

[0046] S03. Heating: The preheated sheet 2 is heated and softened by hot air on both sides. The temperature of the hot air on both sides is 150 - 170 °C, and it is transported to the mold;

[0047] S04. Shaping: The carrying mold 11 is preheated in advance (the preheating temperature is 150 - 170 °C). After preheating, it is combined with the air - conveying mold 12 to form a closed space. The air - conveying mold 12 outputs gas to drive the sheet 2 to fit the inner wall of the carrying mold 11. The gas pressure needs to reach 0.5 - 0.7 Mpa. Subsequently, the carrying mold 11 is cooled and the mold is opened to obtain a connecting component;

[0048] S05. Cutting: The formed connecting component moves to the cutting tool head and is cut to obtain the finished product.

[0049] In the above - mentioned technical solution, by preheating the sheet 2 to reduce humidity, the bubbles generated by water evaporation during the heating process are reduced, so as to avoid the situation that the sheet 2 tears due to the weakness of the bubbles when fitting the rounded corners and separating. And the sheet 2 is softened by hot air on both sides to make the rounded corners fit, thus avoiding depression.

[0050] Example 2

[0051] As Figures 1-11 shown, a forming device for a disposable dinner plate, comprising a hot - pressing mold 1. The hot - pressing mold 1 includes a carrying mold 11 and an air - conveying mold 12. The carrying mold 11 is provided with:

[0052] A mold cavity 111, on the outer layer of which a heat - flow pipeline 114 is arranged, and a cooling pipeline 112 is arranged in the heat - flow pipeline 114;

[0053] An auxiliary pushing mechanism 4, which includes a push slider 41 slidably connected to the rounded corner of the mold cavity 111. The push slider 41 switches between the following two working positions:

[0054] The first working position: The push slider 41 slides and retracts to the rounded corner as the heat - flow pipeline 114 is ventilated;

[0055] Second station: the push slide 41 slides along with the gas supply of the cooling pipe 112 and extends into the mold cavity 111.

[0056] Specifically, the supporting mold 11 is a fixed mold, and a guide column 13 is arranged along the diagonal line on it. A guide hole 122 corresponding to the guide column 13 is opened on the gas delivery mold 12. A pressure air hole 121 is opened in the vertical direction on the gas delivery mold 12. A pressure pipe 3 is fixedly connected to the pressure air hole 121. The two pressure pipes 3 are used to output gas at the same time to keep the two ends of the sheet 2 evenly expanded when the sheet 2 is expanded. A fillet is opened on the mold cavity 111, and the push slider 41 is slidably set at the fillet, and the push slider 41 is kept inclined. Heat flow docking holes 113 are opened at both ends of the hot flow pipeline 114, and one of the heat flow docking holes 113 is docked with a hot flow gas delivery unit (the hot flow gas delivery unit can be a heating wire with a pressure fan). Before the mold is closed, the hot flow gas delivery The unit delivers hot air to the heat flow pipe 114. At this time, the push slider 41 slides with the ventilation of the heat flow pipe 114, retracts the fillet, and then the mold is closed. When the mold is closed, the support mold 11 and the gas supply mold 12 are closed, and the retracted push slider 41 will not hinder the sheet 2 from fitting the fillet and the mold cavity 111. Then the cooling pipe 112 supplies air to cool the heat flow pipe 114 and the support mold 11. When the cooling pipe 112 continuously inputs cooling airflow, the push slider 41 slides into the mold cavity 111 with the air supply of the cooling pipe 112 to push the formed sheet 2. At the same time, the pressure pipe 3 stops supplying air to separate the formed sheet 2 from the inner wall of the mold cavity 111, which can increase the temperature during preheating and prevent the sheet 2 at the fillet from tearing.

[0057] As an embodiment provided by the present invention, the auxiliary propulsion mechanism 4 also includes a sliding air bin 42 arranged in the hot flow pipe 114, the push slider 41 is slidably connected in the sliding air bin 42, a venturi tube 422 is arranged on the sliding air bin 42, an air outlet 115 is opened in the hot flow pipe 114, and the venturi tube 422 is coaxially arranged in the air outlet 115.

[0058] Specifically, the push slider 41 is slidably connected to the sliding air bin 42, and a venturi tube 422 is provided on the sliding air bin 42. The size of the venturi tube 422 is smaller than the air outlet 115. When the hot flow gas delivery unit delivers hot air to the hot flow pipe 114, the hot air flow will be ejected from the air outlet 115 to accelerate the flow of air in the hot flow pipe 114. At the same time, when the air is discharged, it will flow along the venturi tube 422 and suck the gas in the sliding air bin 42, thereby driving the push slider 41 to move with the negative pressure as the gas is extracted, so that the push slider 41 slides with the ventilation of the hot flow pipe 114, retracts the radius, and switches to the first workstation.

[0059] Before mold clamping, the hot gas delivery unit delivers hot gas to the hot gas pipeline 114. At this time, the hot gas flow will flow along the Venturi tube 422 and suck the gas in the sliding gas chamber 42, thereby driving the push slider 41 to move negatively with the gas extraction and retract the rounded corner. Subsequently, mold clamping is performed. When mold clamping, the carrying mold 11 and the gas delivery mold 12 are closed, and the retracted push slider 41 does not hinder the sheet 2 from fitting the rounded corner and the mold cavity 111. Then, the cooling pipeline 112 delivers gas to cool the hot gas pipeline 114 and the carrying mold 11. When the cooling air flow is continuously input into the cooling pipeline 112, the push slider 41 slides into the mold cavity 111 with the gas delivery of the cooling pipeline 112 to push against the formed sheet 2. At the same time, the pressure pipe 3 stops delivering gas to separate the formed sheet 2 from the inner wall of the mold cavity 111.

[0060] As an embodiment provided by the present invention, an air collecting pipe 410 is provided in the push slider 41, and the air collecting pipe 410 is docked with the Venturi tube 422 for air extraction when the push slider 41 switches to the first working position.

[0061] Specifically, an air collecting pipe 410 is provided in the push slider 41, and both ends of the air collecting pipe 410 face the two ends of the push slider 41 respectively. When the push slider 41 switches to the first working position and retracts the rounded corner, the air collecting pipe 410 will be docked and communicated. At this time, the suction of the Venturi tube 422 will suck the inside of the mold cavity 111 along the air collecting pipe 410, thereby avoiding the situation that air stays in the mold cavity 111 and generates bubbles resulting in depressions.

[0062] Before mold clamping, the hot gas delivery unit delivers hot gas to the hot gas pipeline 114. At this time, the hot gas flow will flow along the Venturi tube 422 and suck the gas in the sliding gas chamber 42, thereby driving the push slider 41 to move negatively with the gas extraction and retract the rounded corner. Subsequently, mold clamping is performed. When mold clamping, the carrying mold 11 and the gas delivery mold 12 are closed, and the retracted push slider 41 does not hinder the sheet 2 from fitting the rounded corner and the mold cavity 111, and the air collecting pipe 410 will be docked and communicated. At this time, the suction of the Venturi tube 422 will suck the inside of the mold cavity 111 along the air collecting pipe 410 to avoid gas residue. Then, the cooling pipeline 112 delivers gas to cool the hot gas pipeline 114 and the carrying mold 11. When the cooling air flow is continuously input into the cooling pipeline 112, the push slider 41 slides into the mold cavity 111 with the gas delivery of the cooling pipeline 112 to push against the formed sheet 2. At the same time, the pressure pipe 3 stops delivering gas to separate the formed sheet 2 from the inner wall of the mold cavity 111.

[0063] As an embodiment provided by the present invention, a limiting column 46 is provided in the sliding gas chamber 42, and an air passage 461 is provided on the limiting column 46. Clamping plates 45 are symmetrically arranged on the push slider 41 along the air collecting pipe 410, and the clamping plates 45 are clamped on the limiting column 46 with the movement of the push slider 41 to communicate the air passage 461 and the air collecting pipe 410.

[0064] Specifically, one end of the limiting column 46 facing the pushing slider 41 is cylindrical. The air vent passage 461 connects the sliding air chamber 42 and the Venturi tube 422. Clamping plates 45 are symmetrically arranged on the pushing slider 41 along the air collecting pipe 410. The clamping plates 45 are made of elastic metal. When the pushing slider 41 slides and retracts driven by the air extraction of the Venturi tube 422, the clamping plates 45 will be clamped on the limiting column 46, so as to fix the retracted pushing slider 41 and prevent the pushing slider 41 from displacing and shaking due to the increase in air pressure.

[0065] Before mold closing, the hot flow gas transmission unit conveys hot gas to the hot flow pipeline 114. At this time, the hot gas flow will flow along the Venturi tube 422 and suck the gas in the sliding air chamber 42, thereby driving the pushing slider 41 to move negatively with the gas extraction, retracting the rounded corner, so that the clamping plate 45 will be clamped on the limiting column 46, thereby fixing the retracted pushing slider 41. Then mold closing is carried out. When the mold closing is carried out, the carrying mold 11 and the gas transmission mold 12 are closed, and the retracted pushing slider 41 will not hinder the sheet 2 from fitting the rounded corner and the mold cavity 111, and the air collecting pipe 410 will be connected and communicated. At this time, the suction of the Venturi tube 422 will suck the inside of the mold cavity 111 along the air collecting pipe 410 to avoid gas residue. Then the cooling pipeline 112 conveys gas to cool the hot flow pipeline 114 and the carrying mold 11. When the cooling air flow is continuously input into the cooling pipeline 112, the pushing slider 41 slides into the mold cavity 111 with the gas transmission of the cooling pipeline 112 to push against the formed sheet 2. At the same time, the pressure pipe 3 stops gas transmission so that the formed sheet 2 is separated from the inner wall of the mold cavity 111.

[0066] As an embodiment provided by the present invention, a cold end air inlet 421 fixedly communicated with the cooling pipeline 112 is opened on the sliding air chamber 42. The cooling pipeline 112 conveys gas into the sliding air chamber 42 to overcome the clamping force of the clamping plate 45 and drive the pushing slider 41 to switch to the second working position;

[0067] A plurality of bifurcated air pipes 1121 are opened on the cooling pipeline 112, and the bifurcated air pipes 1121 discharge air to the outside.

[0068] Specifically, a pressure relief valve is arranged on the Venturi tube 422. A cold end air inlet 421 fixedly communicated with the cooling pipeline 112 is opened on the sliding air chamber 42. After the shaping is completed, the hot flow pipeline 114 stops gas transmission, and the cooling pipeline 112 conveys cold air to cool the carrying mold 11. At the same time, with the continuous transmission of the cold air, the cold end air inlet 421 will convey cooling into the sliding air chamber 42, thereby pushing the pushing slider 41 to move to overcome the clamping force of the clamping plate 45, driving the clamping plate 45 and the limiting column 46 to disengage, and with the continuous injection of the cold air, the pushing slider 41 slides and extends into the mold cavity 111 to switch to the second working position to eject the cooled finished product.

[0069] A plurality of bifurcated air pipes 1121 are provided on the cooling pipe 112, and the bifurcated air pipes 1121 output cold air to the outside to maintain the flow of the cooling pipe 112, so that when both the cooling pipe 112 and the bifurcated air pipes 1121 have cold air flowing, pressure can enter the cold end air inlet 421 to ensure the cooling effect.

[0070] Before mold closing, the hot flow gas delivery unit delivers hot air to the hot flow pipeline 114. At this time, the hot air flow will flow along the Venturi tube 422 and suck the gas in the sliding air chamber 42, thereby driving the push slider 41 to move under negative pressure as the gas is extracted, retracting the fillet, so that the clamping plate 45 will be clamped on the limiting column 46, thereby fixing the retracted push slider 41 and then closing the mold. When closing the mold, the supporting mold 11 and the gas delivery mold 12 are closed, and the retracted push slider 41 will not hinder the sheet 2 from fitting the fillet and the mold cavity 111, and the air collection pipe 410 will be connected to the Venturi tube 422. At this time, Suction will be carried out along the air collecting pipe 410 into the mold cavity 111 to avoid gas residue, and then the cooling pipe 112 will supply gas to cool the heat flow pipe 114 and the supporting mold 11, and the cold end air inlet 421 will transport the cooling gas to the sliding air bin 42, thereby pushing the push slider 41 to move to overcome the clamping force of the clamping plate 45, driving the clamping plate 45 and the limiting column 46 to disengage, and as the cold air is continuously injected, the push slider 41 slides and extends into the mold cavity 111 to push the formed sheet 2, and at the same time the pressure pipe 3 stops supplying gas to separate the formed sheet 2 from the inner wall of the mold cavity 111.

[0071] As an embodiment provided by the present invention, one end of the push slider 41 is rotatably connected to an arc rotating plate 43, an air outlet pipe 411 is opened in the push slider 41, and a docking air port 432 is opened on the arc rotating plate 43. The arc rotating plate 43 flips as the push slider 41 switches its working position to drive the docking air port 432 to be fixedly connected to the air collection pipe 410 or the air outlet pipe 411.

[0072] Specifically, one end of the push slider 41 (the end facing the mold cavity 111) is rotatably connected to two arc rotating plates 43, an air outlet pipe 411 is opened in the push slider 41, and a connected docking air port 432 and a recessed portion 431 are opened on the arc rotating plate 43. When the push slider 41 is in the first station, the arc rotating plate 43 flips over as the push slider 41 retracts to fit the rounded corner on the mold cavity 111. At the same time, the flipped arc rotating plate 43 drives the docking air port 432 to be connected to the air collecting pipe 410, and the gas in the mold cavity 111 is sucked through the recessed portion 431. When the push slider 41 is in the second station, the arc rotating plate 43 flips over as the push slider 41 extends into the mold cavity 111. At this time, the docking air port 432 is connected to the air outlet pipe 411, so that the air outlet assists the formed sheet 2 to separate from the mold cavity 111.

[0073] Before mold clamping, the hot gas flow unit conveys hot gas to the hot gas pipeline 114. At this time, the hot gas flow will flow along the Venturi tube 422 and suck the gas in the sliding gas chamber 42, thereby driving the push slider 41 to move negatively with the gas suction, retracting the rounded corner, so that the clamping plate 45 will be clamped on the limiting column 46, thereby fixing the retracted push slider 41. Subsequently, mold clamping is carried out. The air collecting pipe 410 will be butt-connected and communicated. The arc rotating plate 43 will flip with the retraction of the push slider 41 to drive the butt joint air port 432 to be connected with the air collecting pipe 410. At this time, the suction of the Venturi tube 422 will suck the mold cavity 111 along the air collecting pipe 410 to avoid gas residue. Then, the cooling pipeline 112 conveys gas to cool the hot gas pipeline 114 and the carrying mold 11. Cooling gas will be conveyed into the sliding gas chamber 42 from the cold end air inlet 421, thereby pushing the push slider 41 to move to overcome the clamping force of the clamping plate 45, driving the clamping plate 45 and the limiting column 46 to disengage. With the continuous injection of cold gas, the push slider 41 slides and extends into the mold cavity 111. At this time, the butt joint air port 432 is connected with the air outlet pipe 411 to assist the formed sheet 2 to escape from the mold cavity 111 and push against the formed sheet 2. At the same time, the pressure pipe 3 stops conveying gas so that the formed sheet 2 and the inner wall of the mold cavity 111 are separated.

[0074] As the optimal embodiment provided by the present invention, a spring 44 is arranged between the arc rotating plate 43 and the push slider 41, and the spring 44 pulls the arc rotating plate 43 to flip towards the inner wall of the mold cavity 111;

[0075] A blocking plate 451 is arranged on the clamping plate 45. The clamping plate 45 is decoupled from the limiting column 46 to drive the two blocking plates 451 to fit and block the air collecting pipe 410.

[0076] Specifically, the spring 44 is used to always pull the arc rotating plate 43 to flip towards the inner wall of the mold cavity 111. When the push slider 41 retracts at the first working position, the arc rotating plate 43 will be restricted by the inner wall of the mold cavity 111 and flip against the pulling force of the spring 44, so that the butt joint air port 432 is connected with the air collecting pipe 410. When the push slider 41 extends into the mold cavity 111 at the second working position, the spring 44 pulls the arc rotating plate 43 to flip, driving the butt joint air port 432 to be connected with the air outlet pipe 411. A blocking plate 451 is arranged on the clamping plate 45. When cold gas is injected into the sliding gas chamber 42 and overcomes the push of the clamping plate 45 to drive the clamping plate 45 to be decoupled from the limiting column 46, the clamping plate 45 rebounds and drives the two blocking plates 451 to fit and block the air collecting pipe 410, so that after the push slider 41 extends a certain length, the spring 44 can pull the arc rotating plate 43 to flip, avoiding the direct escape of cold gas from the air collecting pipe 410 and ensuring the extending action of the push slider 41.

[0077] Before mold clamping, the hot gas flow unit conveys hot gas to the hot gas pipeline 114. At this time, the hot gas flow will flow along the Venturi tube 422 and suck the gas in the sliding gas chamber 42, thereby driving the push slider 41 to move negatively as the gas is sucked away, retracting the rounded corner, so that the clamping plate 45 will be clamped on the limiting column 46, thereby fixing the retracted push slider 41. Subsequently, mold clamping is carried out, and the air collecting pipe 410 will be butt-connected and communicated. The arc rotating plate 43 rotates as the push slider 41 retracts, driving the butt joint air port 432 to be connected with the air collecting pipe 410. At this time, the suction of the Venturi tube 422 will suck the mold cavity 111 along the air collecting pipe 410 to avoid gas residue. Then, the cooling pipeline 112 conveys gas to cool the hot gas pipeline 114 and the carrying mold 11. Cooling will be conveyed into the sliding gas chamber 42 from the cold end air inlet 421, thereby pushing the push slider 41 to move to overcome the clamping force of the clamping plate 45, driving the clamping plate 45 and the limiting column 46 to separate. At this time, the clamping plate 45 rebounds and will drive the two sealing plates 451 to fit and seal the air collecting pipe 410. As the cold air is continuously injected, the push slider 41 slides and extends into the mold cavity 111. At this time, the butt joint air port 432 is connected with the air outlet pipe 411 to discharge the formed sheet 2 from the mold cavity 111 to push the formed sheet 2. At the same time, the pressure pipe 3 stops conveying gas so that the formed sheet 2 and the inner wall of the mold cavity 111 are separated.

[0078] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A disposable plate forming device, characterized in that: It includes a hot pressing mold, which includes a bearing mold and a gas transmission mold, and the bearing mold is provided with: The mold cavity has a heat flow pipe on its outer layer, and a cooling pipe is arranged inside the heat flow pipe; The auxiliary push mechanism includes a push slider slidably connected to the rounded corner of the mold cavity, and the push slider is switched between the following two positions: First station: the push slider slides along with the ventilation of the heat flow pipe and retracts the fillet; Second station: the push slide slides along with the air supply of the cooling pipeline and extends into the mold cavity; The auxiliary propulsion mechanism also includes a sliding air bin arranged in the heat flow pipe, the push slider is slidably connected in the sliding air bin, a venturi tube is arranged on the sliding air bin, an air outlet is opened in the heat flow pipe, and the venturi tube is coaxially arranged in the air outlet; An air collecting pipe is provided in the push slider, and the air collecting pipe is connected to the venturi pipe to extract air when the push slider switches to the first working position; A limiting column is arranged in the air sliding compartment, an air passage is opened on the limiting column, a clamping plate is symmetrically arranged along the air collecting pipe on the push slider, and the clamping plate moves with the push slider and is clamped on the limiting column to connect the air passage and the air collecting pipe; The sliding air bin is provided with a cold end air inlet fixedly connected to the cooling pipe, and the cooling pipe supplies air to the sliding air bin to overcome the clamping force of the clamping plate and drive the push slide block to switch to the second working position; One end of the push slider is rotatably connected to a circular arc rotating plate, an air outlet pipe is provided in the push slider, and a docking air port is provided on the circular arc rotating plate. The circular arc rotating plate flips with the switching of the push slider station to drive the docking air port to be fixedly connected to the air collection pipe or the air outlet pipe; A spring is arranged between the circular arc rotating plate and the push slider, and the spring pulls the circular arc rotating plate to flip toward the inner wall of the mold cavity; a sealing plate is arranged on the clamping plate, and the clamping plate is decoupled from the limiting column to drive the two sealing plates to fit together and seal the air collection pipe.

2. The disposable plate forming device according to claim 1, characterized in that: The cooling pipeline is provided with a plurality of bifurcated air pipes, and the bifurcated air pipes discharge air to the outside.

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