CN212312584U - Anti-blocking discharging head of sealant double-screw extruder - Google Patents

Abstract

The utility model provides a sealed glue double screw extruder prevents stifled stub bar, relates to an extruder part, including installation piece, ejection of compact mouth and intermediate pipe, be equipped with the material way that communicates ejection of compact mouth and extruder inside on the installation piece, be equipped with supercharging device on the material way, be fixed with the screwed pipe that supplies ejection of compact mouth threaded connection on the installation piece, screwed pipe inner wall and outer wall all are equipped with the screw thread, intermediate pipe one end threaded connection is in the screwed pipe, and the other end stretches into in the ejection of compact mouth; the outer wall of the middle pipe part is attached to the inner wall of the discharging nozzle part. The utility model provides an ejection of compact head that exists blocks up easily among the prior art, difficult clearance and the long problem of clearance time. Greatly saves the time and labor for blocking the discharge head.

Description

Anti-blocking discharging head of sealant double-screw extruder

Technical Field

The utility model relates to an extruder part especially relates to a prevent stifled stub bar.

Background

The extruder is one of the most important equipments in injection molding products, especially in the industries of sealant and the like. At present, the development of extruders is rapid, and plastic extruders can be classified into single-screw, twin-screw and multi-screw extruders according to the number of screws. At present, the single-screw extruder is most widely applied and is suitable for extrusion processing of common materials. The twin-screw extruder has the advantages of less heat generated by friction, more uniform shearing of materials, higher conveying capacity of screws, more stable extrusion amount, long retention of the materials in the machine barrel, uniform mixing and the like, and is widely accepted by users.

However, whatever the extruder, it always clogs in the intermittent operation. For example, when the die equipment is in failure, the material of the discharging head part of the extruder is stagnated, the discharging head of the extruder is small, the extruder cannot be directly heated by the heating device arranged in the extruder, and the extruder is easy to block. The mode of clearance all is dismantling the screw rod clearance at present, if the equipment maintenance time is long still good, the clearance extruder while maintaining, the raw materials can be retrieved, only extravagant some manpowers. However, for some small problems, the maintenance time of ten minutes or more is about one or two hours instead in order to solve the problem of end blockage of the extruder caused subsequently; time is wasted.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides a sealed twin-screw extruder prevents stifled stub bar that goes out, its ejection of compact head of having solved existence among the prior art blocks up easily, difficult clearance and the long problem of clearance time.

In order to solve the problems, the utility model provides a blockage-preventing discharge head of a sealant double-screw extruder, which comprises an installation block, a discharge nozzle and an intermediate pipe, wherein the installation block is provided with a material channel for communicating the discharge nozzle with the interior of the extruder, the material channel is provided with a supercharging device, the installation block is fixed with a screwed pipe for the threaded connection of the discharge nozzle, the inner wall and the outer wall of the screwed pipe are both provided with threads, one end of the intermediate pipe is connected in the screwed pipe in a threaded manner, and the other end of the intermediate pipe extends into the discharge nozzle; the outer wall of the middle pipe part is attached to the inner wall of the discharging nozzle part.

Compared with the prior art, the utility model discloses following beneficial effect has: a pressurizing device is arranged on the material channel to ensure that sufficient pressure is obtained during injection molding; the discharge nozzle can be detached and cleaned through the threaded connection of the threaded pipe and the discharge nozzle, and the cleaning is more convenient; the middle pipe is arranged, and solidified blocking materials are remained in the middle pipe by means of heating and the like, so that the situation that the raw materials are blocked in the threaded pipe or the discharge nozzle and are difficult to clean is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic view of the corresponding relationship between the discharge nozzle, the intermediate pipe and the threaded pipe of the present invention.

Fig. 3 is an end view of the intermediate tube.

Fig. 4 is an end view of a threaded pipe.

Fig. 5 is an end view of the tap.

In the above drawings: 1. mounting blocks; 2. a booster gear; 3. a discharging nozzle; 4. an intermediate pipe; 5. a threaded pipe; 6. an extrusion orifice; 7. a stress edge; 8. and (4) sinking the platform.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1-2, the embodiment of the utility model provides a sealed glue twin-screw extruder prevents stifled stub bar, including installation piece 1, ejection of compact mouth 3 and intermediate pipe 4, be equipped with the material way of intercommunication ejection of compact mouth 3 and extruder inside on the installation piece 1, be equipped with supercharging device on the material way, be fixed with screwed pipe 5 that supplies ejection of compact mouth 3 threaded connection on the installation piece 1, screwed pipe 5 inner wall and outer wall all are equipped with the screw thread, 4 one end threaded connection of intermediate pipe is in screwed pipe 5, and the other end stretches into ejection of compact mouth 3; the outer wall of the middle pipe 4 is partially jointed with the inner wall of the discharging nozzle 3. The stub bar is stopped up, generally because the stub bar needs a tap 3 that has certain length and mould cooperation to accomplish to mould plastics, and this section is not covered to heating device, if do not have continuous work, the inside raw materials of short period of time will solidify and stop up the stub bar. The raw materials inside the common supercharging device cannot be easily blocked due to the heating of the equipment, and the blockage generally needs to be stopped for a long time and needs to be cleaned by disassembling the screw. The mounting block 1 should be provided with a necessary connection structure such as a flange for connecting to the extruder body.

The detailed working process of the embodiment is as follows: when the discharge head is blocked due to solidification of the raw materials, the discharge nozzle 3 is heated through an external heating device, the inner wall of the discharge nozzle 3 is smooth, and the discharge nozzle is easy to separate from the solidified raw materials after being heated; but remains in the intermediate tube 4 and the threaded tube 5; since the solidification degree is weaker toward the inside, the solidified material is also removed when the threaded pipe 5 is unscrewed again, and the pressurizing device can be used normally after extruding the remaining little material with weak fluidity for several times. The raw material in the detached middle tube 4 is cylindrical, and the middle tube 4 is easily processed after being independently heated. The middle pipe 4 can extend deeply to the discharging nozzle 3 to prevent the material from being broken in the discharging nozzle 3, one end of the discharging nozzle 3 is provided with the extrusion hole 6, and the extrusion hole 6 is small and difficult to clean; and the material in the threaded pipe 5 is prevented from being too deep and not being cleaned well in the threaded pipe 5. After the middle pipe 4 is disassembled, the middle pipe can be directly cleaned, and can also be directly replaced by a spare pipe to avoid delaying production.

Further, as shown in fig. 2, a sinking platform 8 matched with the middle pipe 4 is arranged in each of the threaded pipe 5 and the discharging nozzle 3. After the discharging nozzle 3 is in threaded fit with the threaded pipe 5, the distance between the two sinking platforms 8 is approximately equal to the length of the middle pipe 4. So that the intermediate tube 4 does not have a space between its ends for the material to be extruded. As shown in fig. 4 and 5, particularly the sunken platform 8 in the threaded pipe 5, the intermediate pipe 4 should be contacted with it after being screwed down.

Further, the external thread direction of the middle pipe 4 is the same as the internal thread direction of the discharging nozzle 3. Two screw threads are respectively matched with the internal thread and the external thread, and when the screw threads rotate in the same direction, one screw thread is screwed up, and the other screw thread is unscrewed. When the discharging nozzle 3 is screwed out, the solidified raw material transmits torque to the intermediate pipe 4, the intermediate pipe 4 is screwed, and the intermediate pipe 4 is prevented from being screwed out together with the discharging nozzle 3. When screwing in ejection of compact mouth 3, because the raw materials has not been exported yet, the raw materials transmission moment of torsion that does not solidify, ejection of compact mouth 3 can not cause the not hard up of well pipe 3, on the contrary tightly prevents through heavy platform 8 axial clamp that intermediate pipe 4 is not hard up after screwing up.

Further, as shown in fig. 3, a plurality of stress ribs 7 or stress grooves are arranged on the inner wall of the middle tube 4. The stress edges 7 can be arranged along the axial direction and the radial direction, in order to screw out the discharge nozzle 3 and the middle pipe 4, materials can be remained in the middle pipe 4, the stress edges 7 increase the acting force capable of bearing the solidification raw materials, and the materials are not easy to rotate relative to the middle pipe 4.

Further, as shown in fig. 1, the supercharging device comprises two supercharging gears 2 which are meshed with each other, the tangential direction of the meshed part is parallel to the discharging direction, and the cross-sectional area of the part of the material channel before passing through the supercharging device is larger than that of the part after passing through the supercharging device. When the pressurizing gear 2 rotates, the raw materials are taken away from the inner side and discharged from the outer side (the inner value and the outer value are the inner value and the outer value in the conveying direction of the extruder, and the arrow direction in fig. 1 shows the rotating direction of the pressurizing gear 2), the pushing effect of the gear is obtained by adding the larger area, and the part with the smaller area is discharged, so that the pressurizing effect is achieved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (5)

1. The utility model provides a sealed gluey twin-screw extruder prevents stifled stub bar which characterized in that: the extruder comprises an installation block, a discharge nozzle and an intermediate pipe, wherein a material channel communicated with the discharge nozzle and the interior of the extruder is arranged on the installation block, a supercharging device is arranged on the material channel, a threaded pipe for the threaded connection of the discharge nozzle is fixed on the installation block, threads are arranged on the inner wall and the outer wall of the threaded pipe, one end of the intermediate pipe is in threaded connection with the interior of the threaded pipe, and the other end of the intermediate pipe extends into the discharge nozzle; the outer wall of the middle pipe part is attached to the inner wall of the discharging nozzle part.

2. The sealant twin-screw extruder anti-clogging discharge head of claim 1, characterized in that: and the threaded pipe and the discharge nozzle are internally provided with sinking platforms matched with the middle pipe.

3. The sealant twin screw extruder block-resistant discharge head of claim 1 wherein said pressurizing means comprises two intermeshing pressurizing gears, and the tangential direction of the intermeshing gears is parallel to the discharge direction, and the cross-sectional area of the portion of said throat before passing through said pressurizing means is larger than the cross-sectional area of the portion after passing through said pressurizing means.

4. The sealant twin screw extruder anti-clogging discharge head of claim 3 wherein the external thread direction of said intermediate tube is the same as the internal thread direction of the discharge nozzle.

5. The sealant twin screw extruder block-resistant discharge head as claimed in any one of claims 1 to 4, wherein the inner wall of the intermediate tube is provided with a plurality of stress ribs or stress grooves.

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