Special die head for high fluid

Abstract

The utility model discloses a special die head for high fluid, which comprises a machine head, an extrusion cylinder, a connecting plate, a screen exchanger, a flange, a splitter plate, an elbow and a mouth die, the extrusion cylinder is arranged at one end of the machine head, the machine head is connected with the screen exchanger through the connecting plate, the screen exchanger is connected with the splitter plate through the flange, and the splitter plate is connected with the mouth die through the elbow. Raw materials enter the screen exchanger through the extrusion cylinder and the connecting plate, then reach the splitter plate through the flange, are vertically turned on the elbow after passing through the splitter plate, are changed from horizontal to vertical, and are uniformly discharged through multiple holes of the mouth die after reaching the mouth die. High-flowability melt raw materials uniformly flow in the whole high-flowability special die head and have the same retention time in each position in the width direction, so that the uniform extrusion flow speed of melt in each discharge hole in the mouth die is ensured, and the stability and the production efficiency in the production process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a die head, specifically relates to a high fluid special die head. BACKGROUND

[0002] With the application of high molecular material in each field, the pollution of waste high molecular material to the environment has the increasingly aggravating tendency. Plastic is the most widely used high molecular material, and has occupied the world first according to volume. The use of super dilution, low viscosity material is more and more widely applied under the current environment.

[0003] At present, the process of using double screw extruder to process super dilution, low viscosity material is various, and the requirement of raw material before and after discharging is high, which directly causes that the difficulty of discharging is difficult to control. SUMMARY

[0004] In order to solve the unstable problem that super dilution, low viscosity material is difficult to control before and after discharging, the utility model provides a high fluid special die head.

[0005] The utility model provides the following technical scheme:

[0006] A high fluid special die head, including head, extrusion cylinder, connecting plate, screen changer, flange, shunt plate, elbow and mouth mould, the extrusion cylinder is in the head one end, the head is connected with screen changer through connecting plate, screen changer is connected with shunt plate through flange, shunt plate is connected with mouth mould through elbow, raw material passes through extrusion cylinder, connecting plate and enters screen changer, raw material reaches shunt plate again through flange, after passing through shunt plate, it is completed vertical turning on elbow, changes from horizontal to vertical, reaches mouth mould, and the uniform discharging of mouth mould is carried out.

[0007] Further, the water tank and the water tank are sequentially arranged in the proximity of the head end, and the melt raw material is uniformly formed into a strip after discharging through the mouth mould and is introduced into the water tank by the water flow.

[0008] Further, the inlet of the flow channel of the shunt plate is gradually decreasing, and the length of the shunt plate 6 ranges from 175mm to 400mm.

[0009] Further, the number of holes of the mouth mould ranges from 5 to 50, and the hole diameter is Φ2mm to 6mm.

[0010] Further, the water tank is composed of steel plates, a slide is arranged in the water tank, the length of the water tank ranges from 500mm to 1500mm, and the height ranges from 500mm to 1500mm.

[0011] Compared with the prior art, the high fluid special die head has the advantages that the high fluidity melt raw material flows uniformly in the whole high fluid special die head, each place has the same residence time in the width direction, so that the melt extrusion flow rate in each discharge hole of the die head is uniform, and the stability and production efficiency in the production process are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 It is Figure 1 It is an enlarged schematic view of A in the middle.

[0015] In the drawing: 1, head; 2, extrusion cylinder; 3, connecting plate; 4, screen changer; 5, flange; 6, flow dividing plate; 7, elbow; 8, die head; 9, flow guide water tank, 91, slide; 10, water tank. EMBODIMENT

[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] Please refer to Figures 1-3 The high fluid special die head comprises a head 1, an extrusion cylinder 2, a connecting plate 3, a screen changer 4, a flange 5, a flow dividing plate 6, an elbow 7 and a die head 8, one end of the head 1 is the extrusion cylinder 2, the extrusion cylinder 2 is connected with the screen changer 4 through the connecting plate 3, the screen changer 4 is connected with the flow dividing plate 6 through the flange 5, the flow dividing plate 6 is connected with the die head 8 through the elbow 7, the raw material enters the screen changer 4 through the extrusion cylinder 2 and the connecting plate 3, the raw material reaches the flow dividing plate 6 through the flange 5, and the vertical turning is completed on the elbow 7 after passing through the flow dividing plate 6, the horizontal is changed into the vertical, and after reaching the die head 8, the uniform discharge is realized through the multiple holes of the die head 8.

[0018] The melt raw material is uniformly formed into a strip after discharging from the die 8, and is quickly introduced into the water tank 10 by water flow to be completely cooled into a material strip.

[0019] The length of the flow distribution plate 6 ranges from 175mm to 400mm.

[0020] The number of holes of the die 8 ranges from 5 to 50, and the hole diameter is Φ2mm-6mm.

[0021] The flow guide water tank 9 is composed of a steel plate by welding, and a slide 91 is arranged in the flow guide water tank 9. The length of the flow guide water tank ranges from 500mm to 1500mm, the height ranges from 500mm to 1500mm, and the height can be adjusted in the range of 0-200mm.

[0022] The double-screw extruder is composed of a feeder, a main motor, a speed reducer, a screw, a cylinder, an exhaust device, a high fluid special die head, and a flow guide water tank. The main function of the double-screw extruder is to heat the raw materials to melt them, and further mix them through the mutual movement of the screw and the cylinder to make the components fully dispersed and uniformly distributed, so as to finally form a well-plasticized melt raw material.

[0023] The well-mixed melt raw material of the double-screw extruder passes through the special variable-diameter flow channel of the extrusion cylinder 2 and the connecting plate 3, enters the screen changer 4, and the screen changer 4 is provided with a filter screen for filtering the melt to remove impurities. The melt raw material passes through the flange 5 to reach the flow distribution plate 6. The flow channel of the flow distribution plate 6 is treated by transition variable diameter, the inner flow channel surface is plated with chromium and mirror polished, and the smooth flow of the melt raw material is ensured.

[0024] The flow distribution plate 6 is specially designed in structure. The inlet of the flow channel port is gradually decreasing. Through calculation, the special variable diameter and flow channel distribution of the flow channel port are reasonably defined. The flow distribution plate is provided with a heating device and a water cooling structure, so that the melt raw material maintains a stable temperature when passing through the flow distribution plate. The inner wall of the flow channel is polished to ensure the uniform pressure of the melt raw material discharge. The high flowability melt uniformly flows in the whole high fluid special die head, and has the same residence time in the width direction, so as to ensure that the melt extrusion flow rate of each discharge hole of the die is uniform, smooth and stable.

[0025] After the melt raw material passes through the flow distribution plate 6, it completes the vertical turning on the elbow 7 part, changes from horizontal to vertical, reaches the die 8, uniformly discharges from the multiple holes of the die 8, and after cooling and guiding by the specially designed flow guide water tank 9, the melt raw material enters the water tank 10 and completes the subsequent process.

[0026] The special design of the water tank 9 is equipped with a slide type flow guide device near the head end, which is close to the discharge hole of the head and connected to the water inlet. The flow guide device quickly cools the high-speed melt flowing out of the discharge hole, so that the cooling water flows smoothly on the smooth slope surface, which reduces the impact of the water flow and achieves rapid water flow. The melt raw material is uniformly formed into a strip after discharging from the die 8, and is quickly introduced into the water tank part by the water flow to completely cool into a material strip. The special water tank effectively avoids the accumulation of material strips caused by the high melt index and easy adhesion of the melt at the die. The use range of the flow guide water tank 9 is between 500mm-1500mm, the height can be adjusted, and it can better adapt to the needs of different working environments.

[0027] The shunt plate 6, the connected plate 3, the flange 5, the screen changer 4, the elbow 7 and other components are all equipped with heating devices and temperature control devices, and melt pressure and solution temperature sensors are added at key positions to accurately control the temperature and pressure data of the melt raw material. The complete equipment is controlled by a PLC control system. The control system collects various data and provides a man-machine interface, so that various information can be processed in real time, automatic and information management is realized, and the purpose of centralized information processing is achieved.

[0028] The melt raw material is finally formed into a strip after passing through the connected plate 3, the screen changer 4, the flange 5, the shunt plate 6, the elbow 7 and the die 8, and the subsequent pelletizing and collecting are completed.

[0029] When the melt raw material passes through the shunt plate 6, the special design of the shunt plate 6 flow channel structure makes the solution raw material flow uniformly, and each part has the same residence time in the width direction, so that the melt extrusion flow rate in each discharge hole of the die is uniform, the pressure of the melt raw material discharge is uniformly released, and the flow rate is stable, which makes necessary and sufficient preparation for the uniform discharge of the die 8.

[0030] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high fluid dedicated die characterized in that: It includes a head (1), an extrusion barrel (2), a connecting plate (3), a screen changer (4), a flange (5), a flow divider (6), an elbow (7) and a die (8), one end of the head (1) is the extrusion barrel (2), the head (1) is connected with the screen changer (4) through the connecting plate (3), the screen changer (4) is connected with the flow divider (6) through the flange (5), the flow divider (6) is connected with the die (8) through the elbow (7), the raw material enters the screen changer (4) through the extrusion barrel (2) and the connecting plate (3), the raw material reaches the flow divider (6) through the flange (5), and the raw material is vertically turned on the elbow (7) after passing through the flow divider (6), changes from horizontal to vertical, reaches the die (8), and is uniformly discharged through the multiple holes of the die (8).

2. A high fluid speciality die as claimed in claim 1, wherein: A guide water tank (9) and a water tank (10) are sequentially arranged at the head end, the melt raw material is uniformly formed into a strip after being discharged from the die (8), and the melt raw material is introduced into the water tank (10) through water flow.

3. A high fluid speciality die as claimed in claim 1, wherein: The inlet of the flow channel of the flow divider (6) is gradually reduced, and the length of the flow divider (6) ranges from 175mm to 400mm.

4. A high fluid speciality die as claimed in claim 1, wherein: The number of holes of the die (8) ranges from 5 to 50, and the hole diameter is Φ2mm-6mm.

5. A high fluid speciality die as claimed in claim 2, wherein: The guide water tank (9) is composed of a steel plate, a slide (91) is arranged in the guide water tank (9), the length of the guide water tank (9) ranges from 500mm to 1500mm, and the height ranges from 500mm to 1500mm.

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