阅读说明：本技术 超宽pc片材的挤出成型系统 (Extrusion molding system of super wide PC sheet ) 是由 杨新生 于 2019-10-27 设计创作，主要内容包括：本发明涉及一种超宽PC片材的挤出成型系统,包括用于成型PC片材的挤出模具,挤出模具挤出的PC片材的幅宽可达5600mm,挤出模具的进口安装物料混合装置,物料混合装置的壳体通过连接法兰连接挤出模具的进口,物料混合装置的壳体内设有Y形通道,该Y形通道的主通道与连接法兰连通,主通道内设有一带螺旋流道的螺旋芯轴,Y形通道的两个斜通道与螺旋芯轴的螺旋流道相通,其中第一斜通道连接第一流道管的下游端,第二斜通道连接第二流道管的下游端,第一流道管的上游端通过第一计量泵与第一换网器连接,第一换网器用于与一台螺杆挤出机的出料口相连,第二流道管的上游端通过第二计量泵与第二换网器连接,第二换网器用于与另一台螺杆挤出机的出料口相连。(The invention relates to an extrusion molding system of an ultra-wide PC sheet, which comprises an extrusion die for molding the PC sheet, wherein the width of the PC sheet extruded by the extrusion die can reach 5600mm, a material mixing device is arranged at an inlet of the extrusion die, a shell of the material mixing device is connected with the inlet of the extrusion die through a connecting flange, a Y-shaped channel is arranged in the shell of the material mixing device, a main channel of the Y-shaped channel is communicated with the connecting flange, a spiral mandrel with a spiral flow channel is arranged in the main channel, two inclined channels of the Y-shaped channel are communicated with the spiral flow channel of the spiral mandrel, the first inclined channel is connected with the downstream end of a first flow channel pipe, the second inclined channel is connected with the downstream end of a second flow channel pipe, the upstream end of the first flow channel pipe is connected with a first screen changer through a first metering pump, the first screen changer is used for being connected with a discharge hole of a screw extruder, and the upstream end of the second flow channel pipe is connected with a second screen changer, the second screen changer is used for being connected with a discharge port of another screw extruder.)

1. An extrusion molding system of a super-wide PC sheet, comprising an extrusion die (1) for molding a PC sheet, characterized in that: the width of a PC sheet extruded by the extrusion die (1) can reach 5600mm, a material mixing device (2) is installed at an inlet of the extrusion die (1), a shell (2-1) of the material mixing device (2) is connected with the inlet of the extrusion die (1) through a connecting flange (2-2), a Y-shaped channel is arranged in the shell (2-1) of the material mixing device (2), a main channel (2-3) of the Y-shaped channel is communicated with the connecting flange (2-2), a spiral mandrel (2-4) with a spiral flow channel (2-5) is arranged in the main channel (2-3), two inclined channels of the Y-shaped channel are communicated with the spiral flow channel (2-5) of the spiral mandrel (2-4), wherein a first inclined channel (2-6) is connected with the downstream end of a first flow channel pipe (3), the downstream end of second flow channel pipe (4) is connected to second inclined channel (2-7), the upstream end of first flow channel pipe (3) is connected with first trade net ware (7) through first measuring pump (5), first trade net ware (7) are used for linking to each other with a screw extruder's discharge gate, the upstream end of second flow channel pipe (4) is passed through second measuring pump (6) and is traded net ware (8) with the second and be connected, second trade net ware (8) are used for linking to each other with another screw extruder's discharge gate.

2. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: the first inclined channels (2-6) of the material mixing device (2) are connected with the first flow channel pipe (3) through a first feed hopper (9), and the second inclined channels (2-7) of the material mixing device (2) are connected with the second flow channel pipe (4) through a second feed hopper (10).

3. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: the spiral core shaft (2-4) is rotatably arranged in a main channel (2-3) of the Y-shaped channel.

4. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: the aperture of the outlet end of the main channel (2-3) of the Y-shaped channel is larger than the diameter of the hole section for installing the spiral mandrel (2-4).

5. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: first trade gauze ware (7), second trade gauze ware (8) all adopt automatic trade gauze ware, automatic trade gauze ware includes the pneumatic cylinder, trades the net body, trades net dabber, filter screen, the pneumatic cylinder passes through the drive of hydraulic pressure station, trade the piston rod of net dabber connection pneumatic cylinder, and will trade the gauze ware through trading the net dabber and divide into two filter chambers, all be equipped with the filter screen in two filter chambers.

6. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: the first metering pump (5) and the second metering pump (6) both adopt an external-discharge metering pump, so that PC sheet materials used for sealing lubrication in the metering pumps can be discharged out of the metering pumps.

7. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: the extrusion die (1) is a die lip automatic adjusting type extrusion die.

8. The ultra-wide PC sheet extrusion molding system of claim 1, wherein: the extrusion die (1) is a coat hanger type inner runner.

Technical Field

The invention relates to the field of sheet extrusion molding, in particular to an extrusion molding system for an ultra-wide PC sheet.

Background

PC, also known as polycarbonate, is rapidly being developed for its excellent combination of properties and outstanding physical, mechanical, and thermal properties. At present, the forming machine for manufacturing PC sheets on the market can only produce PC sheets with the maximum width of about 1500mm, and a single-machine extrusion forming machine can meet the production requirements. Along with the development of society, people have higher and higher demand on ultra-wide PC sheets, but because the raw materials for manufacturing the PC sheets have poor flowability, are not easy to form and are easy to carbonize, the time for feeding the raw materials from a mould to a forming roller can be shortened by ensuring enough extrusion capacity of the PC raw materials, and if the existing single-machine extrusion molding machine is adopted, the extrusion capacity required by the ultra-wide PC sheets with the width of more than 3000mm and even more than 5000mm can not be met obviously. Moreover, the mixing requirement of the PC sheet on the raw materials is very high, and if the raw materials entering the die are not mixed uniformly, grains are easy to appear on the surface of the PC sheet, the quality of the sheet is affected, and even the sheet is scrapped, so that economic loss is brought to enterprises. Therefore, there is a great need for an extrusion molding system that can be used to produce ultra-wide PC sheets.

Disclosure of Invention

The invention aims to provide an extrusion molding system of an ultra-wide PC sheet, which can ensure enough material extrusion amount, meet the material requirement for producing the ultra-wide PC sheet, fully and uniformly mix the extruded materials and ensure the high quality of PC sheet products.

The technical scheme of the invention is as follows: an extrusion molding system of an ultra-wide PC sheet comprises an extrusion die for molding the PC sheet, wherein the width of the PC sheet extruded by the extrusion die can reach 5600mm, a material mixing device is arranged at an inlet of the extrusion die, a shell of the material mixing device is connected with the inlet of the extrusion die through a connecting flange, a Y-shaped channel is arranged in the shell of the material mixing device, a main channel of the Y-shaped channel is communicated with the connecting flange, a spiral core shaft with a spiral flow channel is arranged in the main channel, two inclined channels of the Y-shaped channel are communicated with the spiral flow channel of the spiral core shaft, the first inclined channel is connected with the downstream end of a first flow channel pipe, the second inclined channel is connected with the downstream end of a second flow channel pipe, the upstream end of the first flow channel pipe is connected with a first net changer through a first metering pump, and the first net changer is used for being connected with a discharge hole of a screw extruder, and the upstream end of the second flow channel pipe is connected with a second net changer through a second metering pump, and the second net changer is used for being connected with a discharge hole of another screw extruder.

The first inclined channel of the material mixing device is connected with the first flow channel pipe through a first feed hopper, and the second inclined channel of the material mixing device is connected with the second flow channel pipe through a second feed hopper.

The spiral mandrel is rotatably mounted in the main channel of the Y-shaped channel.

The diameter of the outlet end of the main channel of the Y-shaped channel is larger than the diameter of the hole section for installing the spiral mandrel.

First trade net ware, second trade net ware all adopt automatic trade net ware, automatic trade net ware includes the pneumatic cylinder, trades the net body, trades net dabber, filter screen, the pneumatic cylinder passes through the drive of hydraulic pressure station, trade the piston rod of net dabber connection pneumatic cylinder, and will trade the net ware through trading the net dabber and divide into two filter chambers, all be equipped with the filter screen in two filter chambers.

The first metering pump and the second metering pump both adopt an external-discharge metering pump, so that PC sheet materials used for sealing lubrication in the metering pumps can be discharged out of the metering pumps.

The extrusion die is a die lip automatic adjusting type extrusion die.

The extrusion die is a coat hanger type inner runner.

Adopt above-mentioned technical scheme: the first screen changer is used for being connected with a discharge port of one screw extruder, the second screen changer is used for being connected with a discharge port of the other screw extruder, and materials are extruded to the first screen changer and the second screen changer through the two screw extruders respectively, so that the extrusion amount of the materials can be increased. The first net changer is connected with the upstream end of the first flow channel pipe through the first metering pump, the second net changer is connected with the upstream end of the second flow channel pipe through the second metering pump, and materials of impurities filtered by the first net changer and the second net changer are conveyed to the metering pump for metering and pressurization. Because the first inclined channel is connected with the downstream end of the first flow channel pipe, and the second inclined channel is connected with the downstream end of the second flow channel pipe, the first metering pump and the second metering pump can enable materials to be continuously conveyed into the material mixing device through the two flow channel pipes in a pressure and quantitative mode. The material mixing device is communicated with the inlet of the extrusion die through the connecting flange, and the main channel of the material mixing device is communicated with the connecting flange, so that the two metering pumps can respectively convey materials in the material mixing device from the two inclined channels and can convey the materials to the extrusion die through the main channel. The main channel is internally provided with a spiral core shaft with a spiral flow passage, the two inclined channels are communicated with the spiral flow passage of the spiral core shaft, so that materials respectively conveyed from the two inclined channels can be interwoven and mixed together in the spiral flow passage of the spiral core shaft, and the materials mixed by the spiral core shaft are conveyed to an extrusion die. The system adopts a multi-machine co-extrusion mode, ensures sufficient extrusion capacity of materials, can meet the requirement of production of ultra-wide PC sheets, adopts a material mixing device to fully mix the materials extruded from different screw extruders respectively, ensures that the materials entering an extrusion die are uniformly mixed, prevents the problems of grains or black spots and the like on the surface of the PC sheet, and ensures the high quality of the PC sheet.

The first inclined channel of the material mixing device is connected with the first flow channel pipe through a first feeding hopper, the second inclined channel of the material mixing device is connected with the second flow channel pipe through a second feeding hopper, the first feeding hopper and the second feeding hopper can guide conveyed materials, and the material mixing device can also buffer the material flowing in.

The spiral core shaft is rotatably arranged in the main channel of the Y-shaped channel, and materials are stirred and mixed by the rotating spiral core shaft in the main channel, so that the materials can be mixed more uniformly.

The aperture of the outlet end of the main channel of the Y-shaped channel is larger than the diameter of the hole section for mounting the spiral mandrel, so that the mixed material can enter the extrusion die as soon as possible, and the time of the material staying in the material mixing device is shortened.

First trade net ware, second trade net ware all adopt automatic trade net ware, automatic trade net ware includes the pneumatic cylinder, trades the net body, trades net dabber, filter screen, the pneumatic cylinder passes through the drive of hydraulic pressure station, trade the piston rod of net dabber connection pneumatic cylinder, and will trade the net ware through trading the net dabber and divide into two filter chambers, all be equipped with the filter screen in two filter chambers. The screen changer is respectively provided with two filter chambers, one filter chamber works, the other filter chamber automatically changes the filter screen, the first screen changer and the second screen changer alternately filter the materials through the respective two filter chambers, the filter screen does not need to be changed by stopping, and the production line can be continuously operated for a long time.

First measuring pump, second measuring pump all adopt outer formula measuring pump, but make the measuring pump of discharging of the PC sheet material that is used for sealed lubrication in the measuring pump, adopt outer formula measuring pump, can in time discharge from the measuring pump with being used for sealed and lubricated material in the measuring pump, prevent to take place the carbonization because of the residence time overlength in the measuring pump of the material that is used for sealed lubrication, and influence the quality of PC sheet.

The extrusion die is a die lip automatic adjusting type extrusion die, and the distance between an upper die lip and a lower die lip can be automatically adjusted, so that the thickness deviation of a product is eliminated.

The extrusion die is a clothes hanger type inner flow passage, the clothes hanger type inner flow passage can enable materials to keep stable flow velocity, the amount of the materials in each flow passage is uniformly distributed, and therefore the materials are extruded into sheets with uniform thickness by the extrusion die.

The invention is further described with reference to the drawings and the specific embodiments in the following description.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the material mixing device of the present invention.

In the attached drawings, 1 is an extrusion die, 2 is a material mixing device, 2-1 is a shell, 2-2 is a connecting flange, 2-3 is a main channel, 2-4 is a spiral mandrel, 2-5 is a spiral flow channel, 2-6 is a first inclined channel, 2-7 is a second inclined channel, 3 is a first flow channel pipe, 4 is a second flow channel pipe, 5 is a first metering pump, 6 is a second metering pump, 7 is a first screen changer, 8 is a second screen changer, 9 is a first feed hopper, and 10 is a second feed hopper.

Detailed Description

Referring to fig. 1 to 2, an extrusion molding system for a super-wide PC sheet includes an extrusion die 1 for molding a PC sheet, where the width of the PC sheet extruded by the extrusion die 1 can reach 5600mm, and the production requirement of the super-wide PC sheet with the width of the extrusion die 1 being up to 3000mm or more, even 5000mm or more, is ensured. The upstream end of the first flow channel pipe 3 is connected with a first net changer 7 through a first metering pump 5, the first net changer 7 is used for being connected with a discharge port of one screw extruder, the upstream end of the second flow channel pipe 4 is connected with a second net changer 8 through a second metering pump 6, the second net changer 8 is used for being connected with a discharge port of another screw extruder, because the width of the extrusion die 1 is large, the material extrusion amount required by the extrusion die 1 is required to be met, therefore, two screw extruders are adopted to ensure enough extrusion amount, and the material extruded by each screw extruder is respectively filtered by one net changer, and the filtering speed is increased. The magazine materials filtered by the first screen changer 7 and the second screen changer 8 are respectively conveyed into the first metering pump 5 and the second metering pump 6 for metering, so that the magazine materials can quantitatively flow into the first flow channel pipe 3 and the second flow channel pipe 4 at constant pressure. The first screen changer 7 and the second screen changer 8 both adopt automatic screen changers, each automatic screen changer comprises a hydraulic cylinder, a screen changing body, a screen changing mandrel and a filter screen, the hydraulic cylinder is driven by a hydraulic station, the screen changing mandrel is connected with a piston rod of the hydraulic cylinder, the screen changer is divided into two filter chambers by the screen changing mandrel, the filter screens are arranged in the two filter chambers, the screen changers are respectively provided with two filter chambers, the hydraulic cylinder is driven by the hydraulic station to enable one filter chamber to be communicated with a feed inlet of the screen changing body, a material with impurities enters from the feed inlet, the material with the impurities is filtered by the filter screen and then enters into a metering pump from a discharge outlet, at the moment, the other filter chamber is not communicated with the screen changing body, after the operation for a period of time, the hydraulic cylinder is driven by the hydraulic station to enable the other filter chamber to be communicated with the feed inlet of the screen changing body, at the moment, the filter chambers for filtering the, the preparation is prepared for next work, the two filter chambers are driven by the hydraulic cylinder to alternately filter materials, the filter screen does not need to be replaced by stopping, waste products cannot be generated when the filter screen is replaced, the material waste cannot be caused, the production line can be continuously operated for a long time, and the production efficiency of the production line is improved. Two measuring pumps all adopt outer formula measuring pump, but make the PC sheet material discharge measuring pump that is used for sealed lubrication in the measuring pump, because the measuring pump adopts material itself to seal and lubricate, consequently, a small amount of material that is used for sealing and lubrication is difficult to avoid long time to be detained in the measuring pump, and the material of making the PC sheet takes place the carbonization blackly if long time is detained then easily, adopt outer formula measuring pump, can be used for sealed and lubricated a small amount of material in the measuring pump in time to discharge from the measuring pump, prevent to take place the carbonization because of the dwell time overlength of sealed lubricated material in the measuring pump, avoid appearing the blackspot because of the material carbonization at PC sheet goods, guarantee the good quality of PC sheet. The device comprises an extrusion die 1, and is characterized in that a material mixing device 2 is installed at an inlet of the extrusion die 1, a shell 2-1 of the material mixing device 2 is connected with the inlet of the extrusion die 1 through a connecting flange 2-2, a Y-shaped channel is arranged in the shell 2-1 of the material mixing device 2, a main channel 2-3 of the Y-shaped channel is communicated with the connecting flange 2-2, a spiral mandrel 2-4 with a spiral flow channel 2-5 is arranged in the main channel 2-3, two inclined channels of the Y-shaped channel are communicated with the spiral flow channel 2-5 of the spiral mandrel 2-4, wherein a first inclined channel 2-6 is connected with a downstream end of a first flow channel pipe 3, and a second inclined channel 2-7 is connected with a downstream end of a second flow channel pipe 4. The materials in the first flow channel pipe 3 and the second flow channel pipe 4 respectively enter the main channel 2-3 from the first inclined channel 2-6 and the second inclined channel 2-7 of the material mixing device 2, are interwoven and converged together through the spiral flow channel 2-5 of the spiral mandrel 2-4 in the main channel 2-3, the uniformly mixed materials through the spiral mandrel 2-4 enter the extrusion die 1, and the materials entering the material mixing device 2 are extruded through two screw extruders, so that the uniformly mixed materials are sent into the extrusion die 1 through the spiral mandrel 2-4, and the condition that grains appear on the formed PC sheet due to uneven mixing of the materials can be avoided. The extrusion die 1 is a die lip automatic adjusting type extrusion die, the automatic adjusting type extrusion die and an automatic thickness measuring system form a full closed loop control system, sheet thickness deviation data detected by an online thickness gauge are fed back to an automatic adjusting bolt on a die lip of the extrusion die 1 after being processed by a computer program, and the automatic fine adjustment of the opening thickness of the die lip is realized through the automatic adjusting bolt, so that the thickness precision of the sheet is quickly and effectively controlled. The extrusion die 1 is a clothes hanger type inner flow passage, the clothes hanger type inner flow passage can enable materials to keep stable flow velocity, the amount of the materials in flow passages on two sides of the clothes hanger type inner flow passage is uniformly distributed, the materials are uniformly spread in the clothes hanger type inner flow passage, and therefore the materials are extruded into sheets with uniform thickness by the extrusion die 1.

The first inclined channels 2-6 of the material mixing device 2 are connected with the first flow channel pipe 3 through a first feed hopper 9, the second inclined channels 2-7 of the material mixing device 2 are connected with the second flow channel pipe 4 through a second feed hopper 10, and the first feed hopper 9 and the second feed hopper 10 can guide conveyed materials and can also buffer the materials flowing into the material mixing device 2. The spiral core shaft 2-4 is rotatably arranged in the main channel 2-3 of the Y-shaped channel, and materials are stirred and mixed by the rotary spiral core shaft 2-4 in the main channel 2-3, so that the materials can be mixed more uniformly, and the uniformity of the materials entering the extrusion die 1 is further ensured. The aperture of the outlet end of the main channel 2-3 of the Y-shaped channel is larger than the diameter of the hole section for mounting the spiral mandrel 2-4, so that the mixed material can enter the extrusion die 1 as soon as possible, the detention time of the material in the material mixing device 2 is shortened, and the carbonization of the material is prevented.

The invention adopts two screw extruders, compared with a single screw extruder, the extrusion amount of the material is increased in multiples, the production requirement of the ultra-wide PC sheet is ensured, the material can rapidly enter a roller of a forming machine after being discharged from an extrusion die 1 through enough extrusion amount, and the roller entering time of the material is shortened; by the material mixing device 2, materials co-extruded by multiple machines can be fully and uniformly mixed, so that a PC sheet is guaranteed to have no lines and excellent quality; the automatic screen changer is adopted, so that the filter screen can be continuously changed in the production line under the condition of no shutdown, no waste is generated during screen changing, material waste is avoided, and the production efficiency can be greatly improved; the invention adopts the external-discharging metering pump, which can reduce or even eliminate the phenomena of black spots and the like in the PC sheet material and ensure the high quality of the product; in addition, the invention adopts a modular design, each part can be independently installed and disassembled, and the operation is simple and the maintenance is convenient.