Screw extrusion molding device

Abstract

The utility model relates to a screw extrusion molding device in the technical field of tire production equipment, which comprises a die, a first screw extruder and a second screw extruder, and discharge ports of the first screw extruder and the second screw extruder are both communicated with a feed port of the die and are arranged up and down; heating cavities are formed in shells of the first screw extruder and the second screw extruder, snakelike coil pipes are arranged in the heating cavities, and inlets and outlets of the two snakelike coil pipes extend out of the heating cavities and are connected with a first air distribution pipe and a second air distribution pipe correspondingly; and the gas distribution pipe I and the gas distribution pipe II are respectively arranged at feed ports of the first screw extruder and the second screw extruder. According to the utility model, two kinds of rubber made of different materials can be extruded and formed to form a double-layer composite rubber belt; and the rubber belt can be preheated while being purged and cleaned, so that the entering of impurities is reduced, and the extrusion molding quality and efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire production equipment, and particularly relates to a screw extrusion molding device. Background Art

[0002] In the production process of tires, rubber blocks generally need to be fed into a mixer for mixing. The rubber strips produced by mixing are stacked on a trolley and transported by the trolley to a screw extrusion molding machine, where they are extruded by the screw extrusion molding machine under certain temperature and pressure and formed after passing through a die. The patent document with the application number CN 101700692 A discloses a dissimilar double-cone screw extrusion molding device. The main structure includes a main screw, a secondary screw, a transmission support part or a machine base, a mixing and extrusion section, a feeding part, a single-screw extrusion part, a head, and a feeding port. The single-screw extrusion part includes a conical main screw and a secondary screw. The main screw is longer than the secondary screw, and the axes of the main screw and the secondary screw intersect. The spiral edges of the main screw and the secondary screw have opposite or the same spiral directions. The secondary screw is provided with a conical screw section, and the cone angle and the length of the spiral edge section are the same as the first half section of the main screw. The spiral edges have opposite or the same spiral directions and are used in cooperation with the first half section of the main screw to form a traditional double-cone screw extrusion machine type. The second half section of the main screw is a cylindrical single-screw section, similar to a single-screw extrusion machine, and the spiral edges continue to extend in length to complete the function of continuous and stable extrusion molding. Although this patent has the advantages of fewer intermediate links and high production efficiency, it cannot extrude rubber sheets of double-layer composite materials. Therefore, a screw extrusion molding device is needed to solve the above technical problems. Summary of the Utility Model

[0003] In view of the above defects existing in the prior art, the utility model provides a screw extrusion molding device, which includes a die, a first screw extruder, and a second screw extruder. The discharge ports of the first screw extruder and the second screw extruder are both communicated with the feed port of the die, and the discharge ports of the first screw extruder and the second screw extruder are arranged up and down. Heating cavities are provided on the shells of the first screw extruder and the second screw extruder. Medium inlets and medium outlets are provided on both heating cavities. Serpentine coils are provided in both heating cavities. The inlets and outlets of both serpentine coils extend outside the heating cavities. The inlets of both serpentine coils are respectively connected with air inlet pipes, and both air inlet pipes are connected with an air pump. Conveyors I and II are respectively matched at the feed ports of the first screw extruder and the second screw extruder.

[0004] A blowing component one is provided at the feed inlet of the first screw extruder. The blowing component one includes an air distribution pipe one. Both ends of the air distribution pipe one are fixed on the first screw extruder through a bracket one. One end of the air distribution pipe one is connected to the outlet of the serpentine coil in the heating cavity of the first screw extruder through a guide pipe one. A plurality of air jet nozzles one are provided on the air distribution pipe one, and the jet direction of the air jet nozzle one faces the discharging end of the conveyor one.

[0005] A blowing component two is provided at the feed inlet of the second screw extruder. The blowing component two includes an air distribution pipe two. Both ends of the air distribution pipe two are fixed on the frame of the conveyor two through a bracket two. One end of the air distribution pipe two is connected to the outlet of the serpentine coil in the heating cavity of the second screw extruder through a guide pipe two. A plurality of air jet nozzles two are provided on the air distribution pipe two, and the jet direction of the air jet nozzle two faces the feed inlet of the second screw extruder.

[0006] The air jet nozzles one and two on the air distribution pipe one and the air distribution pipe two can blow and dust the rubber belts entering the first screw extruder and the second screw extruder, reducing the entry of impurities. At the same time, the air ejected by the air jet nozzles one and two is heated in the serpentine coil and then blown onto the rubber belts to be fed into the first screw extruder and the second screw extruder. The heat of the first screw extruder and the second screw extruder can be used to preheat the rubber belts in advance, improving the extrusion efficiency.

[0007] Preferably, the second screw extruder is horizontally arranged, the first screw extruder is inclined and arranged above the second screw extruder, the discharging end of the conveyor one is located above the feed inlet of the first screw extruder, the conveyor two is horizontally arranged, a transition roller is provided at the feed inlet of the second screw extruder, both ends of the transition roller are matched with a bracket three, the two brackets three are fixedly connected with the second screw extruder, both ends of the transition roller are respectively rotationally connected with the corresponding bracket three through bearings, one end of the transition roller is connected with a stepping motor, and the stepping motor is fixed on the bracket three.

[0008] Preferably, a cleaning component is matched at the feed end of the conveyor two. The cleaning component includes two cleaning brushes. The bristles of the two cleaning brushes face each other. Both ends of the two cleaning brushes are respectively matched with a bidirectional screw. The end parts of the two cleaning brushes on the same side are respectively in threaded cooperation with the forward threaded section and the reverse threaded section of the corresponding bidirectional screw. One end of each of the two bidirectional screws is respectively rotationally connected with a bracket four through a bearing, the two brackets four are fixedly connected with the frame of the conveyor two, and the other ends of the two bidirectional screws are respectively fixedly connected with a rotating handle.

[0009] Preferably, both the conveyor one and the conveyor two are belt conveyors or roller conveyors.

[0010] The present utility model further includes other components that enable a screw extrusion molding device to be used normally, such as the control components of the stepping motor, the control components of conveyor one and conveyor two, the control components of the first screw extruder, the control components of the second screw extruder, the control components of the air pump, and the heating components of the first screw extruder and the second screw extruder, etc., which are all conventional technical means in the art. In addition, the devices or components not defined in the present utility model, such as the first screw extruder, the second screw extruder, the air pump, the belt conveyor, the roller conveyor, the jet head, etc., all adopt the conventional technical means and conventional equipment in the art.

[0011] The beneficial effects of the present utility model are as follows: The structure is reasonable, and it can extrude and form two different materials of rubber to form a double-layer composite rubber belt; it can blow and clean the rubber belt entering the first screw extruder and the second screw extruder while preheating, reducing the entry of impurities, and improving the quality and efficiency of extrusion molding. Brief Description of the Drawings

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 It is a schematic structural diagram of a screw extrusion molding device in an embodiment of the present utility model;

[0014] Figure 2 is Figure 1 a left view of the cooperation between the second screw extruder and conveyor two in

[0015] Figure 3 is Figure 2 an enlarged view of part A in

[0016] Figure 4 is Figure 3 a schematic structural diagram of the connection between the cleaning brush and the bidirectional screw in

[0017] In the figure: 1, die; 2, first screw extruder; 3, second screw extruder; 4, conveyor one; 5, support one; 6, jet head one; 7, air distribution pipe one; 8, transition roller; 9, stepping motor; 10, outlet of the serpentine coil; 11, rubber belt; 12, air guide pipe two; 13, conveyor two; 14, air distribution pipe two; 15, support two; 16, trolley; 17, support four; 18, bidirectional screw; 19, cleaning brush; 20, rotating handle; 21, bristles. Detailed Description of the Embodiment

[0018] The present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention and specific embodiments. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

[0019] Embodiment

[0020] As Figures 1-4 shown, the present invention provides a screw extrusion molding device, including a die 1, a first screw extruder 2 and a second screw extruder 3. The discharge ports of the first screw extruder 2 and the second screw extruder 3 are both communicated with the feed port of the die 1, and the discharge ports of the first screw extruder 2 and the second screw extruder 3 are arranged vertically; heating chambers are provided on the shells of the first screw extruder 2 and the second screw extruder 3, a medium inlet and a medium outlet are provided on both of the two heating chambers, serpentine coils are provided in the two heating chambers, the inlets and outlets of the two serpentine coils extend outside the heating chambers, the inlets of the two serpentine coils are respectively connected with air inlet pipes, both of the two air inlet pipes are connected with an air pump, and a conveyor one 4 and a conveyor two 13 are respectively matched at the feed ports of the first screw extruder 2 and the second screw extruder 3;

[0021] A blowing assembly one is provided at the feed port of the first screw extruder 2. The blowing assembly one includes an air distribution pipe one 7. Both ends of the air distribution pipe one 7 are fixed on the first screw extruder 2 through a support one 5. One end of the air distribution pipe one 7 is connected with the outlet 10 of the serpentine coil in the heating chamber of the first screw extruder 2 through a guide air pipe one. A plurality of air jet heads one 6 are provided on the air distribution pipe one 7, and the jetting direction of the air jet heads one 6 faces the discharging end of the conveyor one 4;

[0022] A blowing assembly two is provided at the feed port of the second screw extruder 3. The blowing assembly two includes an air distribution pipe two 14. Both ends of the air distribution pipe two 14 are fixed on the frame of the conveyor two 13 through a support two 15. One end of the air distribution pipe two 14 is connected with the outlet 10 of the serpentine coil in the heating chamber of the second screw extruder 3 through a guide air pipe two 12. A plurality of air jet heads two are provided on the air distribution pipe two 14, and the jetting direction of the air jet heads two faces the feed port of the second screw extruder 3.

[0023] The air jet nozzles I (6) on the air distribution pipe I (7) and the air distribution pipe II (14) can blow and remove dust from the rubber belts (11) entering the first screw extruder (2) and the second screw extruder (3), reducing the entry of impurities. At the same time, the air ejected from the air jet nozzles I (6) and the air jet nozzles II is heated in the serpentine coil pipes and then blown onto the rubber belts (11) to be fed into the first screw extruder (2) and the second screw extruder (3). The heat of the first screw extruder (2) and the second screw extruder (3) can preheat the rubber belts (11) in advance, improving the extrusion efficiency.

[0024] The second screw extruder (3) is horizontally arranged, the first screw extruder (2) is inclined and arranged above the second screw extruder (3), the discharge end of the conveyor I (4) is located above the feed inlet of the first screw extruder (2), the conveyor II (13) is horizontally arranged, a transition roller (8) is provided at the feed inlet of the second screw extruder (3), both ends of the transition roller (8) are fitted with support brackets III, the two support brackets III are fixedly connected to the second screw extruder (3), both ends of the transition roller (8) are respectively rotatably connected to the corresponding support brackets III through bearings, one end of the transition roller (8) is connected with a stepping motor (9), and the stepping motor (9) is fixed on the support bracket III.

[0025] The feed end of the conveyor II (13) is fitted with a cleaning assembly. The cleaning assembly includes two cleaning brushes (19), the bristles (21) of the two cleaning brushes (19) face each other, both ends of the two cleaning brushes (19) are respectively fitted with a bidirectional screw (18), and the end parts of the two cleaning brushes (19) on the same side are respectively in threaded fit with the forward threaded section and the reverse threaded section of the corresponding bidirectional screw (18). One ends of the two bidirectional screws (18) are respectively rotatably connected to a support bracket IV (17) through bearings, the two support brackets IV (17) are fixedly connected to the frame of the conveyor II (13), and the other ends of the two bidirectional screws (18) are respectively fixedly connected with a rotating handle (20). The rubber belt (11) on the trolley (16) passes between the two cleaning brushes (19) before entering the conveyor II (13), and the bristles (21) of the two cleaning brushes (19) are respectively in contact with the upper and lower surfaces of the rubber belt (11) to clean it. In order to further improve the product quality, a same cleaning assembly can be provided at the feed end of the conveyor I to clean the rubber belt entering the conveyor I.

[0026] Both the conveyor I (4) and the conveyor II (13) are belt conveyors or roller conveyors.

[0027] Working principle: The two different rubber belts after being kneaded by the internal mixer are respectively stacked on the trolleys and transported to the conveyor I and the conveyor II by the trolleys. The conveyor I and the conveyor II transport the corresponding rubber belts to the first screw extruder and the second screw extruder. The rubber belts entering the first screw extruder and the second screw extruder are respectively blown and dust-removed and preheated by the air jet nozzles I and the air jet nozzles II, improving the efficiency and effect of extrusion molding. Then, they enter the die forming to form a rubber belt composed of two composite rubber materials, upper and lower.

[0028] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A screw extrusion molding device, comprising a die, a first screw extruder and a second screw extruder, wherein the discharge ports of the first screw extruder and the second screw extruder are both connected to the feed port of the die, and the discharge port of the first screw extruder and the discharge port of the second screw extruder are arranged up and down; characterized in that: The first screw extruder and the second screw extruder are both provided with a heating chamber on their shells, and the two heating chambers are both provided with a medium inlet and a medium outlet, and the two heating chambers are provided with a serpentine coil, and the inlet and outlet of the two serpentine coils are both extended out of the heating chamber, and the inlet of the two serpentine coils are respectively connected to an air inlet pipe, and the two air inlet pipes are both connected to an air pump, and the first screw extruder and the second screw extruder are respectively equipped with a conveyor 1 and a conveyor 2 at the feed inlet; A blowing assembly is provided at the feed inlet of the first screw extruder, and the blowing assembly includes an air distribution pipe, both ends of which are fixed to the first screw extruder through a bracket, one end of which is connected to the outlet of the serpentine coil in the heating chamber of the first screw extruder through an air guide pipe, and a plurality of air jet heads are provided on the air distribution pipe, and the air jet direction of the air jet head is toward the unloading end of the conveyor; A second blowing assembly is provided at the feed inlet of the second screw extruder, and the second blowing assembly includes a second air distribution pipe. Both ends of the second air distribution pipe are fixed to the frame of the second conveyor through a second bracket, and one end of the second air distribution pipe is connected to the outlet of the serpentine coil in the heating chamber of the second screw extruder through a second air guide pipe. A plurality of second jet nozzles are provided on the second air distribution pipe, and the jetting direction of the second jet nozzle is toward the feed inlet of the second screw extruder.

2. A screw extrusion molding device according to claim 1, characterized in that: The second screw extruder is horizontally arranged, the first screw extruder is tiltedly arranged above the second screw extruder, the discharge end of the conveyor one is located above the feed port of the first screw extruder, the conveyor two is horizontally arranged, a transition roller is provided at the feed port of the second screw extruder, both ends of the transition roller are matched with bracket three, two of the bracket three are fixedly connected to the second screw extruder, both ends of the transition roller are rotatably connected to the corresponding bracket three through bearings, one end of the transition roller is connected to a stepper motor, and the stepper motor is fixed on the bracket three.

3. A screw extrusion molding device according to claim 1, characterized in that: The feed end of the conveyor 2 is equipped with a cleaning assembly, which includes two cleaning brushes, the bristles of the two cleaning brushes are arranged facing each other, and the two ends of the two cleaning brushes are respectively equipped with bidirectional screws, and the ends of the two cleaning brushes located on the same side are respectively threadedly matched with the positive thread segment and the reverse thread segment of the corresponding bidirectional screw, one end of the two bidirectional screws is rotatably connected to a bracket four through a bearing, the two brackets four are fixedly connected to the frame of the conveyor 2, and the other ends of the two bidirectional screws are respectively fixedly connected to a rotating handle.

4. A screw extrusion molding device according to claim 1, characterized in that: The conveyor 1 and the conveyor 2 are both belt conveyors or roller conveyors.

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