Extrusion molding equipment for improving straightness of plastic plate

Abstract

The utility model relates to the technical field of plastic plate processing, in particular to extrusion molding equipment for improving the straightness of a plastic plate, which comprises a main machine body, the extrusion device is used for melting the plastic and extruding the plastic into a plastic plate; the conveying device is used for receiving the plastic plate extruded from the extrusion device; the leveling device is used for leveling the plastic plate to improve the flatness of the plastic plate; the cooling device is used for cooling and shaping the plastic plate; the leveling device comprises a supporting frame installed on the top of the main machine body, a plurality of lower pressing rollers are rotationally arranged at the position, close to the center of the supporting frame, of the supporting frame, and the leveling device further comprises a lifting frame. The flattening device is additionally arranged at the discharging end of the conveying device, the flattening device is composed of the upper pressing roller and the lower pressing roller, and the upper pressing roller and the lower pressing roller work cooperatively to apply appropriate pressure to an extruded plastic plate, so that the flattening effect of the plastic plate is achieved, and the straightness of the plastic plate is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic plate processing, in particular to extrusion molding equipment for improving the straightness of plastic plates. Background Art

[0002] The plastic sheet extrusion molding device is a key equipment for manufacturing plastic sheets. Its operating mechanism is to heat and melt plastic particles or powders through a heating system, then send the molten plastic to the outlet of the extruder and extrude it into a mold. However, during the operation of the extruder, the screw, barrel and other parts may cause extrusion pressure fluctuations due to wear or improper matching, which in turn affects the extrusion speed and product quality of the sheet. This pressure instability will directly cause the sheet to vibrate during the extrusion process, thereby affecting its straightness.

[0003] Chinese patent application CN118849371A discloses a PE plastic sheet extrusion molding device, which is equipped with a molding rotor and a digital display control panel. The molding rotor is designed as a hollow cylinder, and a bracket is provided on the outside for supporting and rotating around its central axis, and a component for driving the molding rotor to rotate is installed on the bracket. One end of the central axis of the molding rotor is sealed and rotatably connected to the feed pipe. This patent can extrude multiple plastic sheets at the same time during the rotation of the molding rotor through the synergistic effect of components such as the molding rotor, the rotation drive component, the cutting knife component, the feed pipe and the inflation pressurization component. By using centrifugal force, the plastic sheet can remain straight during the extrusion process. At the same time, when the molding rotor rotates, the cutting knife component can also be used to cut the plastic sheet.

[0004] In the prior art, when the plastic plate thrown out by the rotating forming head falls onto the conveying device, the plastic plate is easily bent due to the force due to the contact with the conveying device, thereby affecting the straightness of the plastic plate. Utility Model Content

[0005] The utility model aims to provide an extrusion molding device for improving the flatness of plastic sheets. A flattening device is added to the discharge end of a conveyor device. The flattening device is composed of an upper pressure roller and a lower pressure roller. The two rollers work together to apply appropriate pressure to the extruded plastic sheet, thereby achieving a flattening effect on the plastic sheet and significantly improving its flatness.

[0006] In order to solve the problems of the prior art, the utility model provides an extrusion molding device for improving the flatness of a plastic plate, comprising a main body; an extrusion device for melting plastic and extruding the plastic into a plastic plate; a conveying device for receiving the plastic plate extruded from the extrusion device; a leveling device for leveling the plastic plate to improve the flatness of the plastic plate; a cooling device for cooling and shaping the plastic plate; the leveling device comprises a support frame installed on the top of the main body, the support frame is rotatably provided with a plurality of lower pressure rollers near the center position thereof, the leveling device also comprises a lifting frame, and a plurality of upper pressure rollers corresponding to the lower pressure rollers are rotatably provided inside the lifting frame, and the lifting frame and the upper pressure rollers are used to level the plastic plate.

[0007] Preferably, the leveling device further comprises a telescopic driving member installed on the top of the supporting frame, and an output end of the telescopic driving member is fixedly connected to the top of the lifting frame.

[0008] Preferably, a belt pulley for transmission is fixed at one end of each lower pressure roller, and a conveyor belt is sleeved between the two belt pulleys; the leveling device includes a rotating drive member, and the output end of the rotating drive member is fixedly connected to one of the lower pressure rollers.

[0009] Preferably, the cooling device comprises a shunt pipe installed on the leveling device, two shunt pipes are provided and are respectively distributed on the upper and lower surfaces of the plastic plate, and each shunt pipe is provided with a plurality of nozzles along its length direction.

[0010] Preferably, the cooling device includes a box body, the inner part of the box body is a refrigeration chamber and a heat dissipation chamber, the cooling device includes a fan, the air outlet of the fan is connected to an air duct, the air duct diversion pipes are connected to each other, and the air inlet of the fan is connected to the refrigeration chamber through a pipeline.

[0011] Preferably, the cooling device includes an evaporator installed in the refrigeration cavity, and the evaporator is used to cool the air in the refrigeration cavity.

[0012] Preferably, the cooling device includes a compressor installed in the heat dissipation cavity, the compressor is connected to the evaporator through a pipeline, the cooling device also includes a condenser installed in the heat dissipation cavity, the condenser is connected to the evaporator through a pipeline, an expansion valve is also installed on the pipeline between the condenser and the evaporator, and the condenser and the compressor are connected through a pipeline.

[0013] Preferably, the cooling device further comprises a heat dissipation fan installed in the heat dissipation cavity for dissipating heat from the condenser.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The present application is provided with a leveling device, which includes an upper pressure roller that can move up and down. When the plastic plate is accurately transferred between the lower pressure roller and the upper pressure roller, the telescopic drive member will drive the lifting frame to move downward smoothly, thereby driving the upper pressure roller to contact the plastic plate. Under the synergistic effect of the lower pressure roller and the upper pressure roller, the plastic plate is leveled, thereby significantly improving the flatness of the plastic plate;

[0016] 2. In order to ensure that the flattened plastic sheet can be stably fixed, the compressor is started and the condensing agent begins to circulate throughout the system. When the condensing agent flows through the evaporator, it quickly transforms from liquid to gas in the evaporator and absorbs a large amount of heat in the process, causing the temperature in the refrigeration chamber to drop sharply. Subsequently, the fan efficiently draws this cold air into the nozzle and evenly sprays it on the plastic sheet to achieve rapid cooling and shaping of the plastic sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first three-dimensional structural schematic diagram of an extrusion molding device for improving the flatness of a plastic sheet according to the utility model;

[0018] Figure 2 This is a second three-dimensional structural schematic diagram of an extrusion molding device for improving the straightness of a plastic sheet according to the utility model;

[0019] Figure 3 This is a first three-dimensional structural schematic diagram of a flattening device of an extrusion molding device for improving the flatness of a plastic sheet according to the utility model;

[0020] Figure 4 This is a second three-dimensional structural schematic diagram of a flattening device of an extrusion molding device for improving the flatness of a plastic sheet according to the utility model;

[0021] Figure 5 This is a first three-dimensional structural schematic diagram of a cooling device for an extrusion molding device for improving the straightness of a plastic sheet according to the utility model;

[0022] Figure 6 It is a second three-dimensional structural schematic diagram of a cooling device of an extrusion molding device for improving the straightness of a plastic plate according to the utility model.

[0023] The numbers in the figure are: 1, main body; 11, extrusion device; 12, conveying device; 13, leveling device; 131, support frame; 132, lower pressure roller; 133, lifting frame; 134, upper pressure roller; 135, telescopic drive member; 136, pulley; 137, rotating drive member; 14, cooling device; 141, box body; 142, compressor; 143, evaporator; 144, condenser; 145, cooling fan; 146, fan; 147, air duct; 148, diverter pipe; 149, nozzle. DETAILED DESCRIPTION

[0024] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Reference Figure 1-Figure 6 As shown, the utility model provides an extrusion molding device for improving the flatness of a plastic plate, comprising a main body 1; an extrusion device 11, used for melting plastic and extruding the plastic into a plastic plate; a conveying device 12, used for receiving the plastic plate extruded from the extrusion device 11; a leveling device 13, used for leveling the plastic plate to improve the flatness of the plastic plate; a cooling device 14, used for cooling and shaping the plastic plate; the leveling device 13 comprises a support frame 131 installed on the top of the main body 1, the support frame 131 is rotatably provided with a plurality of lower pressure rollers 132 near its center position, the leveling device 13 also comprises a lifting frame 133, and the lifting frame 133 is rotatably provided with a plurality of upper pressure rollers 134 corresponding to the lower pressure rollers 132, the lifting frame 133 is a frame that can move up and down, and is used for adjusting the distance between the upper pressure roller 134 and the lower pressure roller 132 to adapt to plastic plates of different thicknesses, and the lower pressure roller 132 and the upper pressure roller 134 are used for leveling the plastic plate.

[0026] refer to Figure 1-4 As shown, the leveling device 13 also includes a telescopic driving member 135 installed on the top of the support frame 131, and the output end of the telescopic driving member 135 is fixedly connected to the top of the lifting frame 133. A belt pulley 136 for transmission is fixed at one end of each lower pressure roller 132, and a conveyor belt is sleeved between the two belt pulleys 136; the leveling device 13 includes a rotating driving member 137, and the output end of the rotating driving member 137 is fixedly connected to one of the lower pressure rollers 132. When the rotating driving member 137 is started, the rotating driving member 137 causes the lower pressure roller 132 to rotate, thereby causing the plastic plate to be transported. The rotating driving member 137 can be a motor or other mechanism that can drive the lower pressure roller 132 to rotate.

[0027] When in use, when the plastic sheet is accurately transferred between the lower pressing roller 132 and the upper pressing roller 134, the telescopic driving member 135 will drive the lifting frame 133 to move downward steadily, thereby driving the upper pressing roller 134 to contact the plastic sheet. Under the coordinated action of the lower pressing roller 132 and the upper pressing roller 134, the plastic sheet is flattened, thereby significantly improving the flatness of the plastic sheet.

[0028] refer to Figure 5 and Figure 6As shown, the cooling device 14 includes a shunt pipe 148 installed on the leveling device 13, and the shunt pipe 148 is provided with two shunt pipes 148 respectively distributed on the upper and lower surfaces of the plastic plate, and each shunt pipe 148 is provided with a plurality of nozzles 149 along its length direction. The shunt pipe 148 is responsible for conveying cold air to the nozzle 149 and spraying it out. The cooling device 14 includes a box body 141, and the interior of the box body 141 is divided into a refrigeration chamber and a heat dissipation chamber. The cooling device 14 includes a fan 146, and the air outlet of the fan 146 is connected to the air duct 147, and the air duct 147 is connected to the shunt pipe 148, and the air inlet of the fan 146 is connected to the refrigeration chamber through a pipeline. The fan 146 is used to generate airflow, suck the cold air in the refrigeration chamber into the shunt pipe 148, and spray it onto the plastic plate through the nozzle 149. The plastic plate is cooled.

[0029] The cooling device 14 includes an evaporator 143 installed in the refrigeration cavity, and the evaporator 143 is used to cool the air in the refrigeration cavity. The cooling device 14 includes a compressor 142 installed in the heat dissipation cavity, and the compressor 142 is connected to the evaporator 143 through a pipeline. The cooling device 14 also includes a condenser 144 installed in the heat dissipation cavity, and the condenser 144 is connected to the evaporator 143 through a pipeline. An expansion valve is also installed on the pipeline between the condenser 144 and the evaporator 143, and the condenser 144 and the compressor 142 are connected through a pipeline. The cooling device 14 also includes a heat dissipation fan 145 installed in the heat dissipation cavity for dissipating heat from the condenser 144. The refrigerant evaporates in the evaporator 143, absorbs the heat in the refrigeration cavity, and the high-temperature and high-pressure refrigerant vapor enters the condenser 144. In the condenser 144, the heat is transferred to the surrounding environment through the blowing action of the heat dissipation fan 145, and the refrigerant condenses into liquid.

[0030] When in use, when the condensing agent flows through the evaporator 143, the condensing agent is rapidly converted from liquid to gas in the evaporator 143, and absorbs a large amount of heat in the process, causing the temperature in the refrigeration chamber to drop sharply. Subsequently, the fan 146 efficiently draws the cold air into the nozzle 149 and evenly sprays it on the plastic plate, thereby achieving rapid cooling and shaping of the plastic plate.

[0031] Working principle: When in use, the raw material is first processed into plastic plates by the extruder 11, and these plastic plates are then conveyed to the conveyor 12. The conveyor 12 accurately delivers the plastic plates to the space between the lower pressure roller 132 and the upper pressure roller 134. Next, the telescopic drive 135 is started, and the telescopic drive 135 pushes the lifting frame 133 to move downward smoothly, so that the plastic plates are tightly clamped between the lower pressure roller 132 and the upper pressure roller 134. Then, the rotary drive 137 is started, and the drive drives the lower pressure roller 132 to rotate, and the plastic plates are flattened by the rolling action of the rollers, thereby significantly improving the flatness of the plastic plates. At the same time, in order to cool and shape the flattened plastic plates, the compressor 142 is started to circulate the condensing agent. When the condensing agent flows through the evaporator 143, it quickly evaporates from liquid to gas inside the evaporator 143 and absorbs a large amount of heat, thereby reducing the temperature in the refrigeration chamber. The fan 146 then sucks in the cold air and sprays it evenly onto the plastic plate through the nozzle 149, achieving rapid cooling and shaping. On the other hand, the condensing agent becomes gaseous after completing the refrigeration process and enters the condenser 144 to release heat. At this time, the cooling fan 145 is started to dissipate heat from the condenser 144 through air flow, so that the gaseous condensing agent condenses back into liquid state, ready for the next round of circulation. This whole process ensures the high flatness and stable shaping of the plastic plate.

[0032] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. An extrusion molding device for improving the flatness of a plastic sheet, characterized in that: include: A main body (1); an extrusion device (11) for melting plastic and extruding the plastic into a plastic plate; a conveying device (12) for receiving the plastic plate extruded from the extrusion device (11); a leveling device (13) for leveling the plastic plate to improve the flatness of the plastic plate; and a cooling device (14) for cooling and shaping the plastic plate. The leveling device (13) comprises a support frame (131) mounted on the top of the main body (1), the support frame (131) being rotatably provided with a plurality of lower pressure rollers (132) near its center position. The leveling device (13) further comprises a lifting frame (133), and the lifting frame (133) is internally provided with a plurality of upper pressure rollers (134) corresponding to the lower pressure rollers (132). The lifting frame (133) and the upper pressure rollers (134) are used to level the plastic plate.

2. The extrusion molding device for improving the straightness of a plastic sheet according to claim 1, characterized in that: The leveling device (13) further comprises a telescopic driving member (135) mounted on the top of the support frame (131), and an output end of the telescopic driving member (135) is fixedly connected to the top of the lifting frame (133).

3. The extrusion molding device for improving the straightness of a plastic sheet according to claim 1, characterized in that: A belt pulley (136) for transmission is fixed to one end of each lower pressure roller (132), and a conveyor belt is sleeved between the two belt pulleys (136); the leveling device (13) comprises a rotating drive member (137), and the output end of the rotating drive member (137) is fixedly connected to one of the lower pressure rollers (132).

4. The extrusion molding device for improving the straightness of a plastic sheet according to claim 1, characterized in that: The cooling device (14) comprises a shunt pipe (148) mounted on the leveling device (13), wherein the shunt pipe (148) is provided with two pipes respectively distributed on the upper and lower surfaces of the plastic plate, and each shunt pipe (148) is provided with a plurality of nozzles (149) along its length direction.

5. The extrusion molding device for improving the straightness of a plastic sheet according to claim 4, characterized in that: The cooling device (14) comprises a box body (141), the interior of the box body (141) is divided into a refrigeration chamber and a heat dissipation chamber, the cooling device (14) comprises a fan (146), the air outlet of the fan (146) is connected to an air duct (147), the air duct (147) and the diverter pipe (148) are connected to each other, and the air inlet of the fan (146) is connected to the refrigeration chamber through a pipeline.

6. The extrusion molding device for improving the straightness of a plastic sheet according to claim 5, characterized in that: The cooling device (14) comprises an evaporator (143) installed in the refrigeration cavity, and the evaporator (143) is used to cool the air in the refrigeration cavity.

7. The extrusion molding device for improving the straightness of a plastic sheet according to claim 6, characterized in that: The cooling device (14) comprises a compressor (142) installed in the heat dissipation cavity, the compressor (142) and the evaporator (143) are connected via a pipeline, the cooling device (14) further comprises a condenser (144) installed in the heat dissipation cavity, the condenser (144) and the evaporator (143) are connected via a pipeline, an expansion valve is also installed on the pipeline between the condenser (144) and the evaporator (143), and the condenser (144) and the compressor (142) are connected via a pipeline.

8. The extrusion molding device for improving the straightness of a plastic sheet according to claim 7, characterized in that: The cooling device (14) further comprises a cooling fan (145) installed in the cooling cavity and used for cooling the condenser (144).

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