CN211590907U - Long Fiber Reinforced Thermoplastic Composite Tracked Mixing Equipment - Google Patents

Abstract

The utility model relates to a long-fiber reinforced thermoplastic composite material crawler-type mixing device, comprising: a shell, two opposite side walls of the shell are respectively provided with a feeding port and a discharging port; and two groups of crawler mechanisms distributed in parallel , the crawler mechanism is installed and fixed inside the casing, a channel for conveying the mixture is formed between the two groups of crawler mechanisms, and the crawler surface of the crawler mechanism is provided with a protrusion for extruding the mixture in the channel, The edges on both sides of the channel and the inner wall of the shell respectively form a closed structure, and the openings of the feeding end and the discharging end of the channel are respectively arranged in a one-to-one correspondence with the feeding port and the discharging port and communicate with each other; the fiber yarn of the utility model The roller cutter is used to cut to a certain length, and it is only initially mixed with thermoplastic resin, and is extruded through the protrusion of the wave-shaped structure on the outer wall of the track inside the mixing device, which not only ensures the full mixing of the billet, but also reduces the shear wear on the fiber, so that the The mechanical properties of the products are significantly improved.

Description

Long Fiber Reinforced Thermoplastic Composite Tracked Mixing Equipment

technical field

The utility model relates to the technical field of composite material equipment, in particular to a long-fiber reinforced thermoplastic composite material crawler type mixing equipment.

Background technique

Fiber-reinforced thermoplastic composite materials are widely used in automobiles, electrical appliances, rail transit, construction industry, civil and light industry and other fields due to their excellent characteristics such as light weight, high strength, environmental protection and recyclability.

The mixing process of fiber and thermoplastic resin is an important part of determining the performance of thermoplastic composites. At present, the more mature mixing equipment includes the D-LFT production line of Coperion W&P Company in Germany and the LFT-D-ILC of Dieffenbacher Company in Germany. production line. The cutting, dispersion of fibers and the mixing of fibers and thermoplastic resins in the above production lines are all carried out in the screw extruder. In order to achieve a better mixing effect, the fiber inlet is usually set at the front end of the extruder. The problem caused by the cutting and mixing process is that the shearing effect of the screw on the fiber is obvious. Generally, the actual length of the fiber is 5-10mm, which is much smaller than the designed fiber length of 15-25mm, resulting in a significant decrease in the performance of the product.

SUMMARY OF THE INVENTION

In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a long-fiber reinforced thermoplastic composite material track-type mixing device, which can be used for effective mixing of fibers with a length of 15-25 mm and thermoplastic resin.

The technical scheme adopted by the utility model to solve its technical problems is:

A long-fiber reinforced thermoplastic composite crawler-type mixing equipment is characterized in that, comprising:

a shell, the two opposite side walls of the shell are respectively provided with a feeding port and a discharging port; and

Two groups of crawler mechanisms distributed in parallel, the crawler mechanisms are installed and fixed inside the casing, a channel for conveying the mixture is formed between the two groups of crawler mechanisms, and the crawler surface of the crawler mechanism is provided with a channel for mixing the mixture in the channel. The extrusion protrusions form a closed structure between the edges on both sides of the channel and the inner wall of the shell respectively, and the openings of the feeding end and the discharging end of the channel are respectively set in a one-to-one correspondence with the feeding port and the discharging port and are mutually Connected.

It also includes a feeding die head, the feeding die head is installed on the side wall of the shell and its feeding side is communicated with the feeding port, and the feeding die head is communicated with the channel on the discharging side, and the feeding The opening length of the discharge side of the die is set equal to or slightly less than the opening length of the channel.

It also includes a discharge die head, the discharge die head is installed on the side wall of the shell and its discharge side is communicated with the discharge port, the feed side of the discharge die head is communicated with the channel, and the discharge The opening length of the feed side of the die is set equal to or slightly larger than the opening length of the channel.

The crawler belt mechanism includes a crawler belt, a support body and a driving roller. The surface of the support body is smooth and the two ends of the support body are arc surfaces. The crawler belt is wrapped on the outside of the support body and the surfaces of both ends thereof and is slidably arranged between the two. , the drive roller is located outside the side of the track mechanism away from the channel, and is connected with the track drive.

The two end surfaces of the driving roller and the edge surfaces of the two sides of the crawler belt are respectively provided with transmission teeth with matching shapes, and the driving roller and the crawler belt are meshed and connected by the transmission teeth.

The drive teeth of the crawler belt are arranged higher than the protrusions of the crawler belt.

The two sides of the support body are respectively provided with mounting holes and are connected and fixed with the side wall of the casing by bolts.

The two ends of the driving roller are respectively rotatably connected to the side wall of the casing, and the rotating shaft of at least one end of the driving roller is exposed from the casing.

The protrusions are of linear structure and are evenly distributed on the surface of the crawler track. The two ends of the protrusions are respectively arranged in alignment with the edges on both sides of the crawler belt or the transmission teeth on both sides of the crawler belt, and the protrusions are distributed in parallel.

The length direction of the protrusions is vertically distributed with the sliding direction of the crawler.

The cross section of the protrusion is arc-shaped, and the included angle between the two arc sides of the arc-shaped section and the surface of the track is 45-60 degrees.

The speed difference between the crawler belts of the two groups of crawler belts is 0.5-2.0 m/min.

The support body is made of heat-conducting material and has a heating channel inside, and the surface of the support body is also provided with a liquid inlet and a liquid outlet communicated with the heating channel.

The liquid inlet is arranged near the inlet side of the channel, and the liquid outlet is arranged near the outlet side of the channel.

The support body is made of heat-conducting material and is provided with a groove body inside, and an electric heating device is provided in the groove body.

It also includes a scraper located inside the casing, the scraper is arranged between the crawler belt and the discharge die head, the two ends of the scraper are respectively connected with the side wall of the casing in rotation, and the scraper is connected to the side wall of the casing. The rotating shaft of at least one end of the feeder is arranged to be exposed from the casing.

It also includes a screw feeder, the discharge side of the screw feeder is fixedly connected with the feeding die head and the two are communicated with each other, and the upper part of the end of the screw feeder is provided with a fiber feeding port for feeding fibers. .

The fibers are fed into the interior after being cut to length by a roller cutter from the upper part of the fiber feeding port.

It also includes a traction and flattening roller, the traction and flattening roller is arranged on the outside of the discharge port of the casing, and the mixed material is drawn out from the discharge port after passing through the traction and flattening roller.

The beneficial effects of the present utility model are:

The fiber inlet is set at the end of the feeder, and the fiber yarn is cut to a fixed length by a roller cutter, and is only initially mixed with thermoplastic resin to ensure that the fiber retention length is 15~25mm; inside the mixing device, it is carried out through the protrusion of the wave-shaped structure on the outer wall of the track. Extrusion not only ensures the full mixing of the billet, but also reduces the shear wear on the fiber, so that the mechanical properties of the product are significantly improved.

Description of drawings

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front view structure schematic diagram of the utility model (without screw feeder and traction flattening roller).

Figure 2 is a schematic diagram of the left side structure of the utility model (without screw feeder and traction flattening roller).

FIG. 3 is a schematic view of the front sectional structure of the utility model.

FIG. 4 is a schematic cross-sectional structural view of the utility model (without screw feeder and traction flattening roller).

Figure 5 is a schematic view of the inner side structure of the feeding die.

Figure 6 is a schematic view of the structure of the outer side of the feeding die.

Figure 7 is a schematic side view of the side structure of the feeding die.

FIG. 8 is a schematic view of the inner side structure of the discharge die.

Figure 9 is a schematic diagram of the structure of the outer side of the discharge die.

Figure 10 is a schematic side view of the side structure of the discharge die.

Figure 11 is a schematic diagram of the structure of the crawler.

FIG. 12 is a schematic cross-sectional structure diagram of “A-A” in FIG. 11 .

FIG. 13 is a schematic cross-sectional structure diagram of “B-B” in FIG. 11 .

FIG. 14 is a partial enlarged structural schematic diagram of “C” of FIG. 12 .

In the figure: 1 shell, 2 first drive roller, 3 first gear motor, 4 third gear motor, 5 scraper, 6 liquid inlet, 7 second drive roller, 8 second gear motor, 9 liquid outlet mouth, 10 screw feeder, 11 thermoplastic resin feeding mouth, 12 supporting body, 13 heating channel, 14 crawler belt, 15 channel, 16 transmission tooth, 17 fiber feeding mouth, 18 roller cutter, 19 fiber, 20 feeding die head, 21 discharge die head, 22 traction flattening roller, 23 mixing material, 24 protrusion.

Detailed ways

The embodiments of the present invention are described below by specific embodiments, and those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

As shown in Figures 1 to 13: this embodiment provides a long fiber reinforced thermoplastic composite material crawler type mixing equipment, including a shell 1, a crawler mechanism, a feeding die 20, a discharging die 21, etc., mainly through Each component provides a device that can convey the mixture 23 through the crawler and realize the full mixing of fiber and thermoplastic resin;

The housing 1 includes a top panel, a bottom panel, a front panel, a rear panel, a left panel and a right panel. The panels are connected to each other to form a closed structure. The left panel of the housing 1 is provided with a feeding port. There is a discharge port on the right panel of The internal components of the body 1 are assembled, and the discharge port is a flat structure, which matches the discharge shape of the mixture 23, and is used for the mixture 23 to leave the shell 1;

The crawler mechanism includes two groups distributed in parallel. The crawler mechanism is horizontally installed and fixed inside the casing 1, and a channel 15 for conveying the mixture 23 is formed between the two groups of crawler mechanisms. A closed structure is formed between the inner walls of the body 1, and the crawler belt mechanism includes a crawler belt 14, a support body 12, a first driving roller 2 and a second driving roller 7, wherein:

The support body 12 is made of metal material with good thermal conductivity, and its surface is smooth and its two ends are semi-circular arc surfaces, which is conducive to the smooth sliding of the crawler 14 on its surface. The front side and the rear side of the body 12 are both open, so that the overall shape of the support body 12 is annular, which reduces the overall quality of the support body 12. The position inside the shell 1 is fixed;

Further, a heating channel 13 is provided inside the support body 12 , and a liquid inlet 6 and a liquid outlet 9 communicating with the heating channel 13 are also provided on the surface of the support body 12 , and the liquid inlet 6 is close to the channel 15 . The liquid outlet 9 is set close to the outlet side of the channel 15, so that the heating oil gradually approaches the front side of the channel 15 during the transportation process from the liquid inlet 6 to the liquid outlet 9, and the heating oil with high temperature can guarantee The heating temperature of the mixture 23, and the heating oil with low temperature can ensure the heat preservation and conveying effect of the mixture 23;

The heating channel 13 is distributed on the side close to the channel 15 for heating and heat preservation transportation of the mixture 23 in the channel 15. The thermal circulating oil is circulated and transported in the heating channel 13 through the external oil heating device, thereby realizing the support body 12. continuous heating effect;

On the outer surface of the crawler belt 14, the two edges of the crawler belt 14 are respectively machined with integrally structured transmission teeth 16, and in the middle of the crawler belt 14 are machined with integrally structured protrusions 24. The protrusions 24 are located between the transmission teeth 16. The bulge 24 is a straight line structure and is evenly distributed on the surface of the crawler 14. Both ends of the bulge 24 are arranged in alignment with the inner end faces of the transmission teeth 16. The parallel distribution between the bulges 24 forms a wave-like structure, so that the length direction of the bulge 24 is the same as that of the crawler belt 14. The sliding direction of the crawler is vertically distributed, that is, during the sliding process of the crawler 14, the mixture 23 can be squeezed by the protrusion 24, so that the fiber 19 and the thermoplastic resin are fully mixed;

Further, the cross-section of the protrusion 24 is arc-shaped, and the included angle (∠A and ∠B) between the two arc sides of the arc-shaped cross-section and the surface of the crawler track 14 is 15-60 degrees, that is, the protrusion 24 The surface is also relatively smooth, which can avoid unevenness on the surface of the mixture 23 when the edges and corners of the protrusions 24 are in contact with the mixture 23 while extruding the mixture 23, and also reduce shear wear on the fibers 19;

Further, the speed difference of the moving speed of the crawler belts 14 of the two groups of crawler belt mechanisms is 0.5~2.0m/min, that is, the crawler belts 14 of the two groups of crawler belt mechanisms are one slow and one fast in the moving process, and the protrusions 24 of the two crawler belts 14 Under the premise of inconsistent movement speeds, a changing relationship of alternate positions will also be formed, so that the static contact effect of the protrusions 24 on the mixture 23 is changed to a dynamic contact effect, that is, the two protrusions 24 of the two crawlers 14 are relatively close to each other. The spacing between them is gradually reduced to overlap, and then gradually expanded to two protrusions 24 overlapping with the next protrusion 24 respectively, so that the extrusion effect of the mixture 23 can be improved;

The first driving roller 2 and the second driving roller 7 are respectively located outside the side of the crawler mechanism away from the channel 15, the first driving roller 2 is located at the upper part, the second driving roller 7 is located at the lower part, and the first driving roller 2 and the On both sides of the surface of the two driving rollers 7 are respectively machined driving teeth 16 which are integrally formed with them. The driving teeth 16 are matched in shape with the driving teeth 16 of the crawler belt 14 and are meshed with each other for power transmission, and are used to drive the crawler belt through the driving rollers. 14 to slide, the rotating shafts at one end of the first driving roller 2 and the second driving roller 7 extend out of the housing 1 and are assembled and fixed with a transmission wheel. The motor 8 is connected by a transmission belt, the first deceleration motor 3 is installed and fixed on the top of the housing 1, and the second deceleration motor 8 is installed in the frame structure at the bottom of the housing 1. By starting the first deceleration motor 3 and the second deceleration motor 8, you can The first driving roller 2, the second driving roller 7 and the corresponding crawler belts 14 are driven to rotate. When the crawler belts 14 of the two groups of crawler belt mechanisms rotate at the same time, the conveying of the mixed material 23 can be realized, so that the upper part of the mixed material 23 and the The lower surface is simultaneously affected by the conveying effect of the crawler belt 14. During the conveying process, the mixed material 23 is squeezed by the protrusion 24 on the surface of the crawler belt 14, so that the mixed material 23 is mixed;

Further, the long-fiber reinforced thermoplastic composite material track-type mixing equipment also includes a feeding die 20 and a discharging die 21, wherein:

The feeding die 20 is installed on the inner wall of the panel of the shell 1 and its feeding side is communicated with the feeding port, and the discharging side of the feeding die 20 is communicated with the channel 15. The feeding die 20 The opening length of the discharge side is equal to the opening length of the channel 15, and the feeding die 20 is used to output the mixture with a specified cross-sectional shape, so that the mixture 23 of the feeding die 20 can be uniformly fed into the opening of the entire channel 15. , to ensure the accuracy of feeding;

The discharge die 21 is installed on the inner wall of the right panel of the housing 1 and its discharge side is communicated with the discharge port, the feed side of the discharge die 21 is communicated with the channel 15, and the discharge die 21 The opening length of the feed side is slightly larger than the opening length of the channel 15, which is convenient for the mixture 23 to enter the inside of the discharge die 21. At the same time, the mixture 23 output by the discharge die 21 is also flat. The shaping effect ensures the output quality of the mixture.

Further, the long-fiber reinforced thermoplastic composite material crawler-type mixing device also includes a scraper 5 located inside the casing 1 , and the scraper 5 is arranged on the two sides of the crawler 14 and the discharge die 21 . The two ends of the scraper 5 are respectively connected to the side wall of the casing 1 in rotation, and the rotating shaft at one end of the scraper 5 is exposed to the casing 1 and is assembled and fixed with a transmission wheel. At the same time, the transmission wheel They are respectively connected with the corresponding two groups of third reduction motors 4 through a transmission belt, and are used to synchronously drive the two groups of scrapers 5 to rotate, and the rotation direction of the scrapers 5 is opposite to the rotation direction of the corresponding crawler belts 14. The outer sidewall of the scraper 5 is provided with radially distributed scrapers. The scraper is a rubber plate and is distributed along the axial direction of the scraper 5 for the mixture that will adhere to the surface of the crawler 14 when it is in contact with the surface. 23 is scraped off, so that the mixture 23 is located inside the channel 15 and enters the discharge die 21. The setting of the scraper 5 can ensure the conveying effect of the mixture 23, so that the mixture 23 will not stick to the surface of the crawler 14. The accumulated material is free of cleaning, reducing labor costs;

Further, the long fiber reinforced thermoplastic composite crawler type mixing equipment also includes a roll cutter 18, a screw feeder 10 and a traction flattening roller 22, and the roll cutter 18, the screw feeder 10 and the traction flattening roll 22 are separate Set up and used with long fiber reinforced thermoplastic composite tracked mixing equipment as:

The discharge side of the screw feeder 10 is fixedly connected to the feeding die 20 and communicated with each other. The front end of the screw feeder 10 is provided with a thermoplastic resin feeding port 11 , and the end of the screw feeder 10 is provided with a thermoplastic resin feeding port 11 . The upper part is provided with a fiber feeding port 17 for feeding the fiber 19, and the fiber 19 is cut from the upper part of the fiber feeding port 17 by the roller cutter 18 and then fed into its interior. The fiber 19 is glass fiber, carbon fiber, basalt fiber, etc. , the length of the fiber 19 is 15-25mm, the thermoplastic resin is polypropylene, polyethylene, polyamide, etc., the traction flattening roller 22 is arranged on the outside of the discharge port of the shell 1, and the mixture 23 is from the discharge port. It is drawn out after passing through the traction and flattening roller 22;

In the above structure, the position of the fiber feeding port 17 is mainly used to bring the fiber 19 into the thermoplastic resin in the molten state, and at the same time avoid the excessive stirring and conveying effect of the screw feeder 10 on the fiber, thereby reducing the damage to the fiber 19. effect, The length of fiber 19 is guaranteed. The thermoplastic blanks produced by this equipment are mixed evenly, the fiber length is 15~25mm, the fiber content is 30~50%, and the thickness is 3~10mm. The blanks can be directly sent to the press for molding production, and can also be stored. After the second use.

The above are only the preferred embodiments of the present invention, as long as the technical solutions for the purposes of the present invention are achieved by basically the same means, they all fall within the protection scope of the present invention.

Claims (19)

1. A long-fiber reinforced thermoplastic composite material crawler-type mixing device is characterized in that, comprising: a shell, the two opposite side walls of the shell are respectively provided with a feeding port and a discharging port; and Two groups of crawler mechanisms distributed in parallel, the crawler mechanisms are installed and fixed inside the casing, a channel for conveying the mixture is formed between the two groups of crawler mechanisms, and the crawler surface of the crawler mechanism is provided with a channel for mixing the mixture in the channel. The extrusion protrusions form a closed structure between the edges on both sides of the channel and the inner wall of the shell respectively, and the openings of the feeding end and the discharging end of the channel are respectively set in a one-to-one correspondence with the feeding port and the discharging port and are mutually Connected. 2. A long-fiber reinforced thermoplastic composite material crawler-type mixing device according to claim 1, characterized in that: it further comprises a feeding die head, the feeding die head is installed on the side wall of the casing and the feeding die is fed. The material side is communicated with the feed port, the discharge side of the feeding die is communicated with the channel, and the length of the opening of the discharge side of the feeding die is set equal to or slightly smaller than the opening length of the channel. 3. The long-fiber reinforced thermoplastic composite material crawler-type mixing equipment according to claim 1, characterized in that: it further comprises a discharge die head, the discharge die head is installed on the side wall of the casing and the discharge die is The material side is communicated with the discharge port, the feed side of the discharge die is communicated with the channel, and the opening length of the feed side of the discharge die is set equal to or slightly larger than the opening length of the channel. 4 . The long-fiber reinforced thermoplastic composite crawler type mixing equipment according to claim 1 , wherein the crawler mechanism comprises crawler belts, a support body and a driving roller, and the support body has a smooth surface and has two ends of A circular arc surface, the crawler belt is wrapped on the outside of the support body and its two end surfaces and is slidably arranged therebetween, the driving roller is located outside the side of the crawler belt mechanism away from the channel, and is connected with the crawler belt in a driving manner . 5 . The long-fiber reinforced thermoplastic composite material track-type mixing device according to claim 4 , wherein the surfaces at both ends of the driving roller and the edge surfaces on both sides of the track are respectively provided with driving teeth with matching shapes, 6 . The drive roller and the crawler are meshed and connected through the transmission teeth. 6 . The long-fiber reinforced thermoplastic composite track-type mixing device according to claim 5 , wherein the drive teeth of the track are set higher than the protrusions of the track. 7 . 7 . The long-fiber reinforced thermoplastic composite crawler-type mixing equipment according to claim 4 , wherein mounting holes are respectively provided on both sides of the support body and are connected and fixed with the side wall of the casing by bolts. 8 . 8 . The long-fiber reinforced thermoplastic composite crawler-type mixing device according to claim 4 , wherein both ends of the driving roller are respectively rotatably connected to the side wall of the casing, and at least one end of the driving roller is rotatably connected. 9 . The shaft is exposed to the housing set. 9 . The long-fiber reinforced thermoplastic composite crawler-type mixing equipment according to claim 1 , wherein the protrusions are linear structures and are evenly distributed on the surface of the crawler, and the two ends of the bulge are respectively connected with the edges on both sides of the crawler. 10 . Or the transmission teeth on both sides of the track are aligned and the protrusions are distributed in parallel. 10 . The long-fiber reinforced thermoplastic composite material track-type mixing device according to claim 1 , wherein the length direction of the protrusions is perpendicular to the sliding direction of the track. 11 . 11 . The long-fiber reinforced thermoplastic composite track-type mixing device according to claim 1 , wherein the cross section of the protrusion is arc-shaped, and two arc sides of the arc-shaped section are connected to the crawler track. 12 . The included angle of the surfaces is 45-60 degrees. 12 . The long-fiber reinforced thermoplastic composite crawler-type mixing equipment according to claim 1 , wherein the speed difference of the crawler tracks of the two groups of crawler mechanisms is 0.5-2.0 m/min. 13 . 13. A long-fiber reinforced thermoplastic composite material crawler-type mixing equipment according to claim 4, characterized in that: the support body is made of thermally conductive material and is provided with a heating channel inside, and the surface of the support body is also provided with the The liquid inlet and the liquid outlet communicated with the heating channel. 14 . The long-fiber reinforced thermoplastic composite crawler type mixing device according to claim 13 , wherein the liquid inlet is arranged near the inlet side of the channel, and the liquid outlet is arranged near the outlet side of the channel. 15 . 15 . The long-fiber reinforced thermoplastic composite material crawler-type mixing equipment according to claim 4 , wherein the support body is made of thermally conductive material and is provided with a groove body inside, and an electric heating device is provided in the groove body. 16 . 16. The long-fiber reinforced thermoplastic composite material crawler-type mixing equipment according to claim 1, characterized in that: it further comprises a scraper located inside the casing, and the scraper is arranged on the crawler and the outlet. Between the material dies, both ends of the scraper are respectively rotatably connected to the side wall of the casing, and the rotating shaft of at least one end of the scraper is arranged to be exposed from the casing. 17. The long-fiber reinforced thermoplastic composite material crawler-type mixing equipment according to claim 2, characterized in that: it further comprises a screw feeder, and the discharge side of the screw feeder is fixedly connected to the feeding die and is The two are communicated with each other, and a fiber feeding port for feeding fibers is provided at the upper end of the screw feeder. 18 . The long-fiber reinforced thermoplastic composite material crawler-type mixing equipment according to claim 17 , wherein the fibers are fed into the interior after being cut to length by a roller cutter from the upper part of the fiber feeding port. 19 . 19. The long-fiber reinforced thermoplastic composite material crawler type mixing equipment according to claim 1, characterized in that: it further comprises a traction flattening roller, and the traction and flattening roller is arranged outside the discharge port of the casing, And the mixture is drawn out from the discharge port after passing through the traction flattening roller.

Images