Forming process and forming equipment for disposable dinner plate

Abstract

The invention discloses a forming process and forming equipment of a disposable dinner plate. The forming process comprises the following steps: S01, material preparation: drying a sheet for 1-2 hours in a dehumidification environment at 125-130 DEG C; s02, preheating is conducted, specifically, the dried sheet is flatly laid and subjected to double-face preheating, and then the sheet is conveyed to heating equipment; s03, heating is conducted, specifically, the preheated sheet is heated and softened through double-face hot air and conveyed to a mold; and S04, shaping is conducted, specifically, the bearing mold is preheated in advance, and after preheating, the bearing mold and the gas conveying mold are closed to form a closed space. According to the plastic forming equipment, a sheet is preheated to reduce humidity, so that bubbles generated by water evaporation in the heating process are reduced, the situation that when fillets are attached and separated, tearing occurs due to the fact that the bubbles are weak is avoided, the sheet is softened through double-face hot air, the fillets are attached, and sinking is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, and in particular to a molding process and molding equipment for a disposable dinner plate. Background Art

[0002] Disposable dinner plates are mostly made of plastic, among which thermoforming technology is used for disposable dinner plates due to its advantages such as high production efficiency and low scrap rate.

[0003] According to patent No. CN116367758A, publication (announcement) date: 2023-06-30, a composite thermoformed tableware and a preparation method thereof are disclosed. The preparation method of the composite thermoformed tableware includes a preheating step, a compounding step and a thermoforming step in sequence; the preheating step includes heating the multi-layer molding material at a temperature of 35°C to 150°C, and the molding material includes one or at least two of paper, plastic and inorganic layer; the compounding step: stacking the preheated molding 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 0.05MPa to 0.5MPa to form a three-dimensional shape. The tableware is formed into a composite structure by thermoforming multiple layers of the same material or different materials, so that the thickness and strength of the tableware are higher. The method has a simple operation process, avoids complex and cumbersome processes, and better controls production costs.

[0004] According to patent number CN209257366U, publication (announcement) date: 2019-08-16, a disposable polymer plastic tableware production molding machine is disclosed, which relates to the field of molding machine technology. The disposable polymer plastic tableware production molding machine includes a top plate and a bottom plate, the bottom of the top plate is fixedly installed with a guide column, the top of the bottom plate is fixedly installed with a guide sleeve, the bottom of the top plate is fixedly installed with an upper mold base, the top of the upper mold base is fixedly installed with an injection molding pipe, the bottom end of the injection molding pipe is fixedly installed with a feed channel, the bottom of the upper mold base is provided with an upper mold cavity, and both sides of the inner wall of the upper mold cavity are provided with overflow cavities. The disposable polymer plastic tableware production molding machine puts the raw material into the mold cavity through the injection molding pipe. When the raw material input reaches a certain amount, the injection molding pipe is completely closed by the rising disc, and the excess raw material is squeezed into the overflow cavity. After the cavity is opened, the raw material in the overflow cavity can be further recycled, thereby avoiding the waste of raw materials and reducing production costs.

[0005] In the prior art including the above-mentioned patent, a disposable dinner plate is provided with a plurality of depressions for holding dishes. Therefore, when designing the mold, a plurality of rounded corners are designed at the two depression ribs for transition. However, because the rounded corners at both ends of the ribs are too close, the sheet material cannot be deformed repeatedly and fit the rounded corners perfectly, which may easily lead to depression or tearing. Summary of the invention

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

[0007] In order to achieve the above object, the present invention provides the following technical solution: a molding process of a disposable dinner plate, comprising the following steps:

[0008] S01. Prepare materials: dry the sheet in a dehumidified environment at 125-130°C for 1-2 hours;

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

[0010] S03, heating: the preheated sheet is heated and softened by double-sided hot air and transported to the mold;

[0011] S04, shaping: the bearing mold is preheated in advance, and after preheating, it is molded together with the gas transmission mold to form a closed space. The gas transmission mold outputs gas to drive the sheet to fit the inner wall of the bearing mold. Then the bearing mold is cooled and opened to obtain the connecting part;

[0012] S05, cutting: the formed connecting parts are moved to the cutting head and cut to obtain finished products.

[0013] A disposable dinner plate forming device, which is used to implement step S04 in the above process, comprises a hot pressing mold, the hot pressing mold comprises a bearing mold and a gas transmission mold, and the bearing mold is provided with:

[0014] The mold cavity has a heat flow pipe on its outer layer, and a cooling pipe is arranged inside the heat flow pipe;

[0015] 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:

[0016] First station: the push slider slides along with the ventilation of the heat flow pipe and retracts the fillet;

[0017] Second station: the push slide slides along with the air supply of the cooling pipeline and extends into the mold cavity.

[0018] Preferably, 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.

[0019] Preferably, an air collecting pipe is provided in the push slider, and the air collecting pipe is connected to the Venturi tube to extract air when the push slider switches to the first working position.

[0020] Preferably, a limiting column is provided in the sliding air bin, an air duct is opened on the limiting column, and a clamping plate is symmetrically provided along the air collecting pipe on the push slider, and the clamping plate is connected to the limiting column as the push slider moves to connect the air duct and the air collecting pipe.

[0021] Preferably, a cold end air inlet fixedly connected to the cooling pipe is provided on the sliding air bin, and the cooling pipe supplies air into the sliding air bin to overcome the clamping force of the clamping plate and drive the push slide block to switch to the second workstation.

[0022] Preferably, one end of the push slider is rotatably connected to a circular arc rotating plate, an air outlet pipe is opened in the push slider, and a docking air port is opened on the circular arc rotating plate. The circular arc rotating plate flips as the push slider station is switched to drive the docking air port to be fixedly connected to the air collection pipe or the air outlet pipe.

[0023] Preferably, a spring is provided 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.

[0024] Preferably, a plurality of bifurcated air pipes are provided on the cooling pipe, and the bifurcated air pipes exhaust air to the outside.

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

[0026] In the above technical scheme, the present invention provides a molding process and molding equipment for a disposable dinner plate, which have the following beneficial effects: reducing humidity by preheating the sheet, thereby reducing bubbles generated by water evaporation during the heating process, so as to avoid tearing of the sheet due to weak bubbles when the rounded corners are fitted and separated, and softening the sheet by double-sided hot air to fit the rounded corners, thereby avoiding depressions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 An overall schematic diagram provided for an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a load-bearing mold provided by an embodiment of the present invention;

[0030] Figure 3A schematic diagram of an explosion of a hot pressing mold provided in an embodiment of the present invention;

[0031] Figure 4 An overall cross-sectional schematic diagram provided for an embodiment of the present invention;

[0032] Figure 5 for Figure 4 The enlarged schematic diagram at A in the middle;

[0033] Figure 6 An exploded schematic diagram of an auxiliary thrust mechanism provided by an embodiment of the present invention;

[0034] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0035] Figure 8 A schematic diagram of an arc rotating plate provided in an embodiment of the present invention;

[0036] Fig. 9 A transparent schematic diagram of a push slider provided by an embodiment of the present invention;

[0037] Fig.10 A schematic diagram of a cooling pipeline provided in an embodiment of the present invention;

[0038] Fig.11 A schematic cross-sectional view of a cooling pipe provided in an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Hot pressing mold; 11. Carrying mold; 111. Mold cavity; 112. Cooling pipeline; 1121. Bifurcated air pipe; 113. Heat flow docking hole; 114. Heat flow pipeline; 115. Air outlet; 12. Gas delivery mold; 121. Pressure air hole; 122. Guide hole; 13. Guide column; 2. Sheet; 3. Pressure pipe; 4. Auxiliary push mechanism; 41. Push 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. Recessed part; 432. Docking air port; 44. Spring; 45. Clamping plate; 451. Sealing plate; 46. Limiting column; 461. Air duct. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0042] Embodiment 1

[0043] A molding process for a disposable dinner plate comprises the following steps:

[0044] S01, material preparation: dry the sheet 2 with a thickness of 0.5 mm in a dehumidified environment at 125-130°C for 1-2 hours. When the thickness of the sheet 2 exceeds 1.2 mm, the drying time needs to be increased to 6-8 hours, and the temperature of the dehumidified environment remains unchanged at 125-130°C;

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

[0046] S03, heating: the preheated sheet 2 is heated and softened by double-sided hot air, the temperature of the double-sided hot air is 150-170°C, and is transported to the mold;

[0047] S04, shaping: the bearing mold 11 is preheated in advance (the preheating temperature is 150-170° C.), and after preheating, it is molded together with the gas delivery mold 12 to form a closed space. The gas delivery mold 12 outputs gas to drive the sheet 2 to fit the inner wall of the bearing mold 11. The gas pressure needs to reach 0.5-0.7 MPa. Then the bearing mold 11 is cooled and opened to obtain the connecting component;

[0048] S05, cutting: the formed connecting parts are moved to the cutting head and cut to obtain finished products.

[0049] In the above technical solution, the humidity is reduced by preheating the sheet 2, thereby reducing the bubbles generated by the evaporation of water during the heating process, so as to avoid the sheet 2 being torn due to the weakness of the bubbles when the rounded corners are fitted and separated, and the sheet 2 is softened by double-sided hot air to fit the rounded corners, thereby avoiding depressions.

[0050] Embodiment 2

[0051] like Figure 1-11 As shown, a disposable plate forming device includes a hot pressing mold 1, the hot pressing mold 1 includes a bearing mold 11 and a gas delivery mold 12, and the bearing mold 11 is provided with:

[0052] The mold cavity 111 has a heat flow pipe 114 on its outer layer, and a cooling pipe 112 is arranged inside the heat flow pipe 114;

[0053] The auxiliary push mechanism 4 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 positions:

[0054] First station: the push slider 41 slides along with the ventilation of the heat flow pipe 114 and retracts the fillet;

[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 closing, the hot flow gas supply unit supplies hot air to the hot flow pipe 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, and then the mold is closed. During mold closing, the supporting 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 hot flow pipe 114 and the supporting mold 11. When the cooling air flow is continuously input into the cooling pipe 112, the push slider 41 slides into the mold cavity 111 along with the gas supply from 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.

[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 connected to the venturi tube 422 to extract air when the push slider 41 switches to the first working position.

[0061] Specifically, an air collecting pipe 410 is opened in the push slider 41, and the two ends of the air collecting pipe 410 are respectively facing the two ends of the push slider 41. When the push slider 41 switches to the first workstation and retracts the radius, the air collecting pipe 410 will be connected with the mold cavity 111 for docking. At this time, the suction of the venturi tube 422 will suck the mold cavity 111 along the air collecting pipe 410, so as to avoid the air from being retained in the mold cavity 111 and generating bubbles, which will cause depression.

[0062] 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, and then the mold is closed. When the mold is closed, 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, the venturi tube 422 is connected to the venturi tube 422. The suction of the chuuri tube 422 will suck the inside of the mold cavity 111 along the air collecting pipe 410 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 when the cooling pipe 112 continuously inputs cooling air flow, the push slider 41 slides into the mold cavity 111 along with the air supply of the cooling pipe 112 to push against 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.

[0063] As an embodiment provided by the present invention, a limiting column 46 is arranged in the sliding air bin 42, an air duct 461 is opened on the limiting column 46, a clamping plate 45 is symmetrically arranged along the air collecting pipe 410 on the push slider 41, and the clamping plate 45 is clamped on the limiting column 46 as the push slider 41 moves to connect the air duct 461 and the air collecting pipe 410.

[0064] Specifically, the end of the limiting column 46 facing the push slider 41 is cylindrical, and the air duct 461 connects the sliding air chamber 42 and the venturi tube 422. The push slider 41 is symmetrically provided with a clamping plate 45 along the air collecting pipe 410. The clamping plate 45 is made of elastic metal. When the push slider 41 is driven to slide and retract as the venturi tube 422 draws air, the clamping plate 45 will be clamped on the limiting column 46, thereby fixing the retracted push slider 41 to prevent the push slider 41 from moving and shaking due to the increase in air pressure.

[0065] 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 is collected. Tube 410 will be connected for docking, at which time the suction of the venturi tube 422 will suck the inside of the mold cavity 111 along the air collecting tube 410 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 when the cooling pipe 112 continuously inputs the cooling air flow, the push slider 41 slides into the mold cavity 111 along with the air supply of the cooling pipe 112 to push against 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.

[0066] As an embodiment provided by the present invention, a cold end air inlet 421 fixedly connected to the cooling pipe 112 is provided on the sliding air bin 42, and the cooling pipe 112 supplies air into the sliding air bin 42 to overcome the clamping force of the clamping plate 45 and drive the push slide 41 to switch to the second working position;

[0067] A plurality of bifurcated air pipes 1121 are provided on the cooling pipe 112 , and the bifurcated air pipes 1121 exhaust air to the outside.

[0068] Specifically, a pressure relief valve is provided on the venturi tube 422, and a cold end air inlet 421 fixedly connected to the cooling pipe 112 is opened on the sliding air bin 42. When the shaping is completed, the hot flow pipe 114 stops supplying gas, and the cooling pipe 112 transports cold air to cool the supporting mold 11. At the same time, with the continuous delivery of cold air, the cold end air inlet 421 will transport the cooling air into 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 with the continuous injection of cold air, the push slider 41 slides and extends into the mold cavity 111 to switch to the second station 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 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 and retract 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, the air collection pipe 410 will be connected with it for docking, and the arc rotating plate 43 will turn over as the push slider 41 retracts, driving the docking air port 432 to be connected with the air collection pipe 410. At this time, the suction of the Venturi tube 422 will suck the inside of the mold cavity 111 along the air collection pipe 410 to avoid gas The body remains, and then the cooling pipe 112 delivers air to cool the hot flow pipe 114 and the supporting mold 11. The cold end air inlet 421 will deliver cooling 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 separate, and as the cold air is continuously injected, the push slider 41 slides and extends into the mold cavity 111. At this time, the docking air port 432 is connected to the air outlet pipe 411, and the air outlet assists the formed sheet 2 to separate from the mold cavity 111 to push the formed sheet 2, and 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.

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

[0075] A blocking plate 451 is provided on the clamping plate 45 , and 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 pull the arc rotating plate 43 to always turn toward the inner wall of the mold cavity 111. When the push slider 41 is retracted in the first position, the arc rotating plate 43 will be restricted by the inner wall of the mold cavity 111 and overcome the pulling force of the spring 44 to turn over, so that the docking air port 432 is connected to the air collecting pipe 410. When the push slider 41 is in the second position and extends into the mold cavity 111, the spring 44 pulls the arc rotating plate 43 to turn over, driving the docking air port 432 to connect with the air outlet pipe 411. The two blocks 451 are connected to each other and a blocking plate 451 is provided on the clamping plate 45. When cold air is injected into the sliding air bin 42 and overcomes the clamping plate 45 to push the clamping plate 45 against the limiting column 46 to decouple, the rebound of the clamping plate 45 will drive 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 over, thereby preventing cold air from escaping directly from the air collecting pipe 410 and ensuring the extension action of the push slider 41.

[0077] Before mold closing, the hot flow gas delivery unit delivers hot air to the hot flow pipe 114. At this time, the hot air flow 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 under negative pressure as the gas is extracted and retract 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. The air collection pipe 410 will be connected to the mold, and the arc rotating plate 43 will flip as the push slider 41 retracts, driving the docking air port 432 to be connected to the air collection pipe 410. At this time, the suction of the Venturi tube 422 will suck the mold cavity 111 along the air collection pipe 410 to avoid gas residue, and then the cooling pipe 112 will deliver air. The hot flow pipe 114 and the supporting mold 11 are cooled, and the cold end air inlet 421 will transport the cooling air into the sliding air bin 42, thereby pushing the push slider 41 to move, so as to overcome the clamping force of the clamping plate 45, and drive the clamping plate 45 and the limiting column 46 to separate. At this time, the rebound of the clamping plate 45 will drive the two blocking plates 451 to fit and block the air collecting pipe 410, and as the cold air is continuously injected, the push slider 41 slides and extends into the mold cavity 111. At this time, the docking air port 432 is connected with the air outlet pipe 411, so that the sheet 2 assisted by the air outlet can be separated from the mold cavity 111 to push the formed sheet 2, and 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.

[0078] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various 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 molding process for a disposable dinner plate, characterized in that: The following steps are involved: S01, material preparation: drying the sheet (2) in a dehumidified environment at 125-130° C. for 1-2 hours; S02, preheating: laying the dried sheet (2) flat and preheating both sides, and then transporting it to a heating device; S03, heating: the preheated sheet (2) is heated and softened by hot air on both sides and transported to the mold; S04, shaping: the bearing mold (11) is preheated in advance, and after preheating, it is molded together with the gas delivery mold (12) to form a closed space, and the gas delivery mold (12) outputs gas to drive the sheet (2) to fit the inner wall of the bearing mold (11), and then the bearing mold (11) is cooled and opened to obtain a connecting component; S05, cutting: the formed connecting parts are moved to the cutting head and cut to obtain finished products.

2. A disposable plate forming device, characterized in that: It is used to implement step S04 in the molding process of the disposable dinner plate according to claim 1, comprising a hot pressing mold (1), wherein the hot pressing mold (1) comprises a bearing mold (11) and a gas delivery mold (12), wherein the bearing mold (11) is provided with: A mold cavity (111) has a heat flow pipe (114) on its outer layer, and a cooling pipe (112) is arranged inside the heat flow pipe (114); The auxiliary push mechanism (4) comprises a push slider (41) slidably connected to the rounded corner of the mold cavity (111), and the push slider (41) switches between the following two positions: First station: the push slider (41) slides along with the ventilation of the heat flow pipe (114) and retracts the rounded corner; Second workstation: the push slide block (41) slides along with the air supply of the cooling pipe (112) and extends into the mold cavity (111).

3. The disposable plate forming device according to claim 2, characterized in that: The auxiliary propulsion mechanism (4) also includes a sliding air chamber (42) arranged in the heat flow pipe (114), the push slider (41) is slidably connected in the sliding air chamber (42), a venturi tube (422) is arranged on the sliding air chamber (42), an air outlet (115) is opened in the heat flow pipe (114), and the venturi tube (422) is coaxially arranged in the air outlet (115).

4. The disposable plate forming device according to claim 3, characterized in that: An air collecting pipe (410) is provided in the push slider (41), and the air collecting pipe (410) is connected to the Venturi pipe (422) to extract air when the push slider (41) switches to the first working position.

5. The disposable plate forming device according to claim 4, characterized in that: A limiting column (46) is arranged in the sliding air bin (42), and an air passage (461) is provided on the limiting column (46). A clamping plate (45) is symmetrically arranged on the pushing slider (41) along the air collecting pipe (410). The clamping plate (45) moves with the pushing slider (41) and is clamped on the limiting column (46) to connect the air passage (461) and the air collecting pipe (410).

6. The disposable plate forming device according to claim 5, characterized in that: The sliding air bin (42) is provided with a cold end air inlet (421) fixedly connected to the cooling pipe (112); the cooling pipe (112) supplies air into the sliding air bin (42) to overcome the clamping force of the clamping plate (45) and drive the push slide block (41) to switch to the second working position.

7. The disposable plate forming device according to claim 6, characterized in that: One end of the push slider (41) is rotatably connected to a circular arc rotating plate (43); an air outlet pipe (411) is provided in the push slider (41); a docking air port (432) is provided on the circular arc rotating plate (43); the circular arc rotating plate (43) turns over as the push slider (41) switches its working position, so as to drive the docking air port (432) to be fixedly connected to the air collection pipe (410) or the air outlet pipe (411).

8. The disposable plate forming device according to claim 7, characterized in that: A spring (44) is provided between the circular arc rotating plate (43) and the push slider (41), and the spring (44) pulls the circular arc rotating plate (43) to turn toward the inner wall of the mold cavity (111).

9. The disposable plate forming device according to claim 6, characterized in that: The cooling pipe (112) is provided with a plurality of bifurcated air pipes (1121), and the bifurcated air pipes (1121) exhaust air to the outside.

10. The disposable plate forming device according to claim 6, characterized in that: A blocking plate (451) is provided on the clamping plate (45), and the clamping plate (45) is decoupled from the limiting column (46) so as to drive the two blocking plates (451) to fit together and block the air collection pipe (410).

Images