CN212331507U

CN212331507U - Production equipment for foaming polypropylene master batch

Info

Publication number: CN212331507U
Application number: CN202020831434.7U
Authority: CN
Inventors: 刘洋; 王新营
Original assignee: Suzhou Taishang New Material Co ltd
Current assignee: Suzhou Taishang New Material Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-01-12
Anticipated expiration: 2030-05-18

Abstract

The utility model discloses a production facility for foaming polypropylene masterbatch, including the horizontal double screw mixing equipment and the single screw mixing equipment that set up, be equipped with the measurement hopper on the barrel of the double screw mixing equipment, it has first shearing interval to divide in the double screw mixing equipment, and first kneading interval, second shearing interval, second kneading interval, and third shearing interval, third kneading interval, fourth shearing interval and fifth shearing interval, the mixed equipment aircraft nose of double screw adopt uncovered design. The PP foaming master batch is produced by adopting a mode of combining a double screw and a single screw, wherein the double screw is mainly used for mixing PP and a foaming agent at a lower temperature and a lower pressure to form a primary mixture in a particle state, the mixture enters the single screw, and is subjected to melting plasticization, extrusion granulation and perfect formation of the foaming PP master batch.

Description

Production equipment for foaming polypropylene master batch

Technical Field

The utility model relates to a production facility for foaming polypropylene masterbatch.

Background

Polypropylene (PP) has good mechanical strength, hardness, and high temperature resistance, and thus has wide applications in daily life and industrial fields. The density and the dielectric constant of PP are reduced by foaming the PP, so that the PP foaming cable has a very attractive application prospect in the fields of consumption and industry, for example, in the field of communication cables, a PP foaming wire is adopted, the temperature resistance grade can reach 105 ℃ without a cross-linking mode, the foaming cable has a very low dielectric constant, and the current development requirement of 5G can be met. The foaming grade PP has higher melt strength and viscosity, so that the foaming agent and the PP are very difficult to mix and process in the preparation of the foaming material, and a foaming phenomenon can be generated due to high shear force in the process of processing, so that the manufacturing of the foaming master batch is very difficult. In order to solve the production problem of the foamed PP master batch, the invention provides the following two-stage production device, which is described in combination with a figure.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, the utility model provides a production facility for foaming polypropylene masterbatch. The utility model discloses technical scheme as follows: a production device for foaming polypropylene master batch comprises a double-screw mixing device which is transversely arranged and a single-screw mixing device which is vertically connected to a machine head of the double-screw mixing device, wherein a metering hopper is arranged on a machine barrel of the double-screw mixing device, a first shearing section, a first kneading section, a second shearing section, a second kneading section, a third shearing section, a third kneading section, a fourth shearing section and a fifth shearing section are sequentially divided from double screws in the double-screw mixing device to the length direction of the machine head, exhaust holes are arranged on the machine barrels of the second shearing section, the third shearing section and the fourth shearing section, kneading units with 45-degree angles are adopted in the first kneading section, the second kneading section and the third kneading section, and large-pitch shearing blocks are adopted in the second shearing section, the third shearing section and the fourth shearing section, the machine head of the double-screw mixing equipment adopts an open design.

Specifically, the method comprises the following steps: the single-screw mixing equipment adopts a starvation feeding mode.

The beneficial effects of the utility model reside in that: the PP foaming master batch is produced by adopting a mode of combining a double screw and a single screw, wherein the double screw is mainly used for mixing PP and a foaming agent at a lower temperature and a lower pressure to form a primary mixture in a particle state, the mixture enters the single screw, and is subjected to melting plasticization, extrusion granulation and perfect formation of the foaming PP master batch; a vent hole is arranged on the machine barrel above the shearing section of the double screw to prevent gas accumulation; the kneading unit with an angle of 45 degrees and the shearing block with a large screw pitch can reduce the pressure of the screw and avoid pp foaming; the double-screw machine head adopts an open design instead of an extrusion opening design, so that the material can enter the single screw under zero pressure, and the foaming of the material is avoided; and in the single screw, a starvation feeding mode is adopted, so that the material is fully melted and plasticized in the single screw, and the bracing and granulating are carried out, thereby completing the whole production process.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Wherein: 1-machine barrel; 2-double screw; 201-a first cutting interval; 202-a first engagement interval; 203-second cutting interval; 204-a second engagement zone; 205-third shear interval; 206-a third engagement zone; 207-fourth shear interval; 208-fifth shear interval; 3, a machine head; 4-a metering hopper; 5-single screw mixing equipment; 6-air vent.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a production apparatus for a foamed polypropylene master batch comprises a twin-screw mixing apparatus arranged horizontally and a single-screw mixing apparatus 5 vertically connected to a head of the twin-screw mixing apparatus, wherein a metering hopper 4 is arranged on a barrel 1 of the twin-screw mixing apparatus, a first shearing section 201, a first kneading section 202, a second shearing section 203, a second kneading section 204, a third shearing section 205, a third kneading section 206, a fourth shearing section 207 and a fifth shearing section 208 are sequentially divided in a length direction of the twin-screw 2 in the twin-screw mixing apparatus toward the head 3, vent holes 6 are arranged on the barrel 1 of the second shearing section 203, the third shearing section 205 and the fourth shearing section 207, kneading units (not shown) with an angle of 45 degrees are arranged in the first kneading section 202, the second kneading section 204 and the third kneading section 206, the second shearing interval 203, the third shearing interval 205 and the fourth shearing interval 207 adopt large-pitch shearing blocks (not shown), and the head 3 of the double-screw mixing device adopts an open design.

The utility model discloses in single screw mixing equipment 5 adopts hungry feed mode.

In the actual use process, a double-screw and single-screw combined mode is adopted to produce the PP foaming master batch, wherein the double screws are mainly used for mixing PP and a foaming agent at a lower temperature and a lower pressure to form a preliminary mixture in a particle state, the mixture enters the single screw, and the single screw is used for melting and plasticizing, extruding and granulating to perfectly form foaming PP master batches; a vent hole 6 is arranged on the machine barrel 1 above the shearing section of the double screw to prevent gas accumulation; the kneading unit with an angle of 45 degrees and the shearing block with a large screw pitch can reduce the pressure of the screw and avoid pp foaming; the double-screw machine head 3 adopts an open design instead of an extrusion opening design, so that the material can enter the single screw under zero pressure, and the foaming of the material is avoided; and in the single screw, a starvation feeding mode is adopted, so that the material is fully melted and plasticized in the single screw, and the bracing and granulating are carried out, thereby completing the whole production process.

It should be noted that the kneading unit, the shear block and the starvation feeding mode of the present invention are common terms in screw extruders and are not described herein.

The drawings and the embodiments are only for illustrating the present invention, and any suitable changes or modifications made by those skilled in the art should not be considered as departing from the scope of the present invention.

Claims

1. A production facility for foaming polypropylene masterbatch which characterized in that: comprises a double-screw mixing device which is transversely arranged and a single-screw mixing device which is vertically connected with the head of the double-screw mixing device, a metering hopper is arranged on a machine barrel of the double-screw mixing equipment, a double screw in the double-screw mixing equipment is sequentially divided into a first shearing interval, a first kneading interval, a second shearing interval, a second kneading interval, a third shearing interval, a third kneading interval, a fourth shearing interval and a fifth shearing interval towards the length direction of the machine head, the machine barrels of the second shearing section, the third shearing section and the fourth shearing section are provided with vent holes, the kneading units with 45-degree angles are adopted in the first kneading interval, the second kneading interval and the third kneading interval, the second shearing interval, the third shearing interval and the fourth shearing interval adopt large-pitch shearing blocks, and the machine head of the double-screw mixing equipment adopts an open design.

2. The production equipment for the expanded polypropylene master batch as claimed in claim 1, wherein: the single-screw mixing equipment adopts a starvation feeding mode.