阅读说明：本技术 一种用于pet瓶片物料的节能型组合螺杆 (Energy-saving combined screw for PET bottle flake material ) 是由 曹阳 于 2020-05-21 设计创作，主要内容包括：本发明涉及螺杆领域,提出了一种用于PET瓶片物料的节能型组合螺杆,该组合螺杆由10节区段机筒组成,单节区段机筒长度为290mm,包括喂料区段、熔融区段、排气区段、混炼区段、均化区段,其中排气区段与混炼区段的机筒结构交替设置,本申请通过对不同区段螺杆元件的针对性组合设计,有效提高了组合螺杆的实用效率,用于螺杆造粒机,显著改善了PET料的塑化效果,造粒产量提高了2倍以上,且使用寿命较常规机型提高了50%以上,综合使用效益高,高效节能,值得推广应用。(The invention relates to the field of screws, and provides an energy-saving combined screw for PET (polyethylene terephthalate) bottle flake materials, which consists of 10 sections of barrels, wherein the length of a single section of barrel is 290mm, and the single section of barrel comprises a feeding section, a melting section, an exhaust section, a mixing section and a homogenizing section, wherein the barrel structures of the exhaust section and the mixing section are alternately arranged.)

1. The utility model provides an energy-saving combination screw rod for PET bottle piece material which characterized in that: the combined screw consists of 10 sections of barrels, wherein the length of a single section of barrel is 290mm, and the single section of barrel comprises a feeding section, a melting section, an exhaust section, a mixing section and a homogenizing section, wherein the barrel structures of the exhaust section and the mixing section are alternately arranged.

2. The energy-saving combined screw for PET bottle flake materials as claimed in claim 1, wherein: the melting section comprises 3 sections of continuously arranged cylinder structures, the exhaust section comprises 3 sections of alternately arranged cylinder structures, the mixing section comprises 2 sections of alternately arranged cylinder structures, and the feeding section and the homogenizing section are respectively provided with 1 section of cylinder.

3. The energy-saving combined screw for PET bottle flake materials as claimed in claim 2, wherein: the barrel structure comprises a conveying element and a shearing element, wherein,

the feeding section is formed by sequentially combining the following elements in a cylinder structure: a conveying element with a lead of 56mm and a length of 56mm, a conveying element with a lead of 96mm and a length of 96mm, a conveying element with a lead of 72mm and a length of 72mm, and a conveying element with a lead of 64mm and a length of 64 mm;

the melting section is formed by sequentially combining the following elements in a cylinder structure: 5 pieces of cutting elements with the length of 56mm, 7 pieces of cutting elements with the length of 72mm, conveying elements with the lead of 56mm and the length of 56mm, and 5 pieces of reverse-rotation cutting elements with the length of 56 mm;

the cylinder structure of the exhaust section is formed by sequentially combining the following elements: conveying elements with leads of 96mm and lengths of 96mm, conveying elements with leads of 72mm and lengths of 72mm, conveying elements with leads of 64mm and lengths of 64mm, and conveying elements with leads of 56mm and lengths of 56 mm;

the mixing section is formed by sequentially combining the following components in a cylinder structure: 5 shearing elements with the length of 56mm, and conveying elements with the lead of 56mm and the length of 56 mm;

the cylinder structure of the homogenizing section is formed by sequentially combining the following elements: a conveying element with a lead of 96mm and a length of 96mm, a conveying element with a lead of 72mm and a length of 72mm, a conveying element with a lead of 64mm and a length of 64mm, and a conveying element with a lead of 56mm and a length of 56 mm.

4. The energy-saving combined screw for PET bottle flake materials as claimed in claim 3, wherein: the conveying element with the internal lead of 96mm and the length of 96mm in the cylinder structure of the feeding section adopts an SK type conveying element.

5. The energy-saving combined screw for PET bottle flake materials as claimed in claim 3, wherein: the 56mm shear element included angle was 45 °, 72mm shear element included angle was 30 °, and 56mm counter-rotating shear element included angle was 45 ° within the barrel structure of the melting section.

6. The energy-saving combined screw for PET bottle flake materials as claimed in claim 3, wherein: the included angle of the 56mm shearing elements in the barrel structure of the mixing section was 45 °.

7. The energy-saving combination screw for PET bottle flake material according to any one of claims 2-6, characterized in that: the thickness of the shearing element sheet is 8-12mm, and the gap is 1.5-2 mm.

8. Use of the energy-saving combination screw for PET bottle flake material as claimed in claim 7 in a twin-screw granulator.

Technical Field

The invention relates to the field of energy conservation and environmental protection, in particular to an energy-saving combined screw for PET bottle flake materials, which has high yield and high efficiency and effectively prolongs the service life.

Background

The screw is a cylinder with a spiral groove cut on the outer surface or a cone with a conical spiral groove cut on the outer surface, and is widely applied to machining centers, CNC machines, numerically controlled lathes, injection molding machines, wire cutting, grinding machines, milling machines, slow wire feeding, fast wire feeding, PCB drilling machines, engraving and milling machines, spark discharge machines, gear biting machines, planing machines, large vertical lathes, planomillers and the like.

At present, screws are used in plastic molding equipment such as plastic profile extruders, injection molding machines, and the like. The screw is an important part in the plastic granulator, the working mechanism of the screw is that the pressure and the shearing force are generated by the rotation of the screw, so that materials can be fully plasticized and uniformly mixed, a common screw is provided with a combined screw, the combined screw is formed by sleeving a plurality of thread elements on a mandrel, the combined screw can form different arrangement combinations on the mandrel of the screw through conveying elements and shearing elements with different specifications, the screw can have different effects, and different screws can be combined according to different materials to have the effect suitable for producing the materials. To this end, the application provides an energy-saving combination screw rod for PET bottle piece material.

Disclosure of Invention

Aiming at the existing problems, the invention provides the energy-saving combined screw for the PET bottle flake material, the practical efficiency of the combined screw is effectively improved through the targeted combined design of screw elements in different sections, the energy-saving combined screw is used for a screw granulator, the plasticizing effect of the PET material is obviously improved, the granulation yield is improved by more than 2 times, the service life is improved by more than 50 percent compared with that of the conventional machine type, the comprehensive use benefit is high, the energy is high, and the energy-saving combined screw is worthy of popularization and application.

In order to achieve the above object, the present invention adopts the following technical solutions:

an energy-saving combined screw for PET bottle flake materials consists of 10 sections of barrels, wherein the length of a single section of barrel is 290mm, and the single section of barrel comprises a feeding section, a melting section, an exhaust section, a mixing section and a homogenizing section, wherein the barrel structures of the exhaust section and the mixing section are alternately arranged.

The melting section comprises 3 sections of continuously arranged cylinder structures, the exhaust section comprises 3 sections of alternately arranged cylinder structures, the mixing section comprises 2 sections of alternately arranged cylinder structures, and the feeding section and the homogenizing section are respectively provided with 1 section of cylinder.

As a further optimization of the invention, the barrel structure comprises a conveying element and a shearing element, wherein,

the feeding section is formed by sequentially combining the following elements in a cylinder structure: a conveying element with a lead of 56mm and a length of 56mm, a conveying element with a lead of 96mm and a length of 96mm, a conveying element with a lead of 72mm and a length of 72mm, and a conveying element with a lead of 64mm and a length of 64 mm;

the melting section is formed by sequentially combining the following elements in a cylinder structure: 5 pieces of cutting elements with the length of 56mm, 7 pieces of cutting elements with the length of 72mm, conveying elements with the lead of 56mm and the length of 56mm, and 5 pieces of reverse-rotation cutting elements with the length of 56 mm;

the cylinder structure of the exhaust section is formed by sequentially combining the following elements: conveying elements with leads of 96mm and lengths of 96mm, conveying elements with leads of 72mm and lengths of 72mm, conveying elements with leads of 64mm and lengths of 64mm, and conveying elements with leads of 56mm and lengths of 56 mm;

the mixing section is formed by sequentially combining the following components in a cylinder structure: 5 shearing elements with the length of 56mm, and conveying elements with the lead of 56mm and the length of 56 mm;

the cylinder structure of the homogenizing section is formed by sequentially combining the following elements: a conveying element with a lead of 96mm and a length of 96mm, a conveying element with a lead of 72mm and a length of 72mm, a conveying element with a lead of 64mm and a length of 64mm, and a conveying element with a lead of 56mm and a length of 56 mm.

As a further optimization of the invention, the conveying element with the internal lead of 96mm and the length of 96mm in the cylinder structure of the feeding section adopts an SK type conveying element.

As a further optimization of the invention, the 56mm shearing element included angle is 45 °, the 72mm shearing element included angle is 30 °, and the 56mm counter-rotating shearing element included angle is 45 ° within the barrel structure of the melting section.

As a further optimization of the invention, the 56mm shearing element included angle in the barrel structure of the compounding section was 45 °.

As a further optimization of the invention, the thickness of the shear element sheet is 8-12mm, and the gap is 1.5-2 mm.

The energy-saving combined screw for the PET bottle flake material is applied to a double-screw granulator.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

the invention effectively improves the practical efficiency of the combined screw by the targeted combined design of screw elements in different sections, is used for a screw granulator, obviously improves the plasticizing effect of PET materials, improves the granulation yield by more than 2 times, prolongs the service life by more than 50 percent compared with the conventional machine type, has high comprehensive use benefit, saves energy, protects environment and is worthy of popularization and application.

The combined screw disclosed by the invention is applied to a double-screw granulator, is suitable for granulating PET bottle flake materials, improves the purity and viscosity of the produced materials by 46% and 52% respectively compared with the screw structure of the existing granulator, and can also be applied to an engineering plastic double-screw granulator.

The combined screw is divided into a feeding section, a melting section, an exhaust section, a mixing section and a homogenizing section, and the whole screw combination is formed by combining most of conveying elements and a small part of shearing elements and is a weak shearing mode.

The feeding section is composed of a large-lead conveying element, the total length of the feeding section exceeds the length of a feed opening, then the conveying elements are arranged and combined into the conveying section in a lead reducing mode, then the materials are mixed by two shearing blocks, four small-lead screw elements are conveyed, the mixing strength is increased through mixing and reverse rotation of the shearing blocks, the materials enter an exhaust section to volatilize some moisture and impurities, the exhaust opening adopts the length that the large-lead conveying element also needs to exceed an exhaust opening, then the conveying elements with the gradually reduced leads are arranged to the next exhaust opening to realize two-section small-lead conveying, a shearing block needs to be added in the middle, the materials are mixed and then enter the next section for exhausting in the same arrangement, the materials are fully mixed, and fully discharging water and impurities in the materials, and finally entering a homogenizing section to arrange the conveying elements with decreasing leads.

The melting section is formed by combining 45-degree and 30-degree neutral shear blocks, the front part of the first exhaust port is formed by combining 45-degree forward rotation and 45-degree reverse rotation, a 45-degree shear block is used between the two adjacent exhaust ports, a 45-degree shear block is also used between the three adjacent exhaust ports, and through the alternative structural design, the multistage shear units with weak shear force are reasonably installed, so that the multistage shear units are progressively mixed and gradually mixed, the homogenization degree of material treatment is effectively improved, and the granules made of PET bottle flakes are excellent in quality, high in purity and good in viscosity.

Drawings

FIG. 1 is a schematic view of the structure of the cylinder of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

The screw combination is applied to a granulator of a double-screw KTE-75B type, the total section is divided into 10 sections, wherein the first section is a feeding machine barrel, the 5 th section, the 7 th section and the 9 th section are exhaust machine barrels which are used for a vacuum pumping system, the rest machine barrels are closed machine barrels, and the lengths of all the machine barrels are 290 mm.

The conveying element is a product formed by double-thread, the conveying element pushes materials forwards through the groove through the rotation of the mandrel, so that the conveying effect is realized, and the shearing element is generally overlapped by the same end surface shape to form a certain angle to form a spiral product. The illustration shows a 45 included angle, a sheet thickness of 10mm and a gap of 1.5. The larger the included angle is, and the thicker the included angle is, the smaller the gap is, and the shearing force to the material is stronger.

In the screw combination technology of the invention, the feeding section is formed by sequentially combining the following elements: 56mm long conveying elements are arranged in a lead, 96mmSK type conveying elements are arranged in a lead, 72mm long conveying elements are arranged in a lead, and 64mm long conveying elements are arranged in a lead. The feeding section adopts full conveying elements, the leads are arranged in a descending manner, and the SK type elements with large leads at the feed opening are used for better feeding, and the SK type elements are wider than the conventional conveying element grooves, so that the materials can better enter, and the bridging phenomenon is prevented. The subsequent lead reduction is in order to obtain a certain pressure before entering the melting section so that the material can smoothly enter the next section.

The melting section is formed by sequentially combining the following elements: 5 length of 45 contained angles are 56mm shearing component, 7 length of 30 contained angles are 72mm shearing component, 56mm length of helical pitch 56mm conveying component, 5 length of 45 contained angles are 56mm backspin shearing component combination, this section is arranged and is obviously more than conveying component, the backspin shearing component is for better shearing material, mix, this section is sheared through heat transfer and friction, make the material fully melt and preliminary homogenization.

The exhaust section consists of the following elements in sequence: the lead length of 96mm is 96mm, the lead length of 72mm is 72mm, the lead length of 64mm is 64mm, and the lead length of 56mm is 56mm, which makes the moisture of the materials and impurities such as low molecular weight substances discharged.

The mixing section consists of the following elements in sequence: 5 shearing elements with the length of 56mm at an included angle of 45 degrees and conveying elements with the length of 56mm at a lead of 56mm make the structure of the materials further refined and uniform to reach an ideal state, simultaneously give consideration to the dispersibility and fully mix

The exhaust section consists of the following elements in sequence: the lead length of 96mm is 96mm, the lead length of 72mm is 72mm, the lead length of 64mm is 64mm, and the lead length of 56mm is 56mm, which makes the moisture of the materials and impurities such as low molecular weight substances discharged.

The mixing section consists of the following elements in sequence: 5 shearing elements with the length of 56mm are arranged at an included angle of 45 degrees, and conveying elements with the length of 56mm are arranged at a lead of 56mm, so that the organization of the materials is further refined and uniform, an ideal state is achieved, and meanwhile, the dispersibility and the sufficient mixing are considered.

The exhaust section consists of the following elements in sequence: the lead length of 96mm is 96mm, the lead length of 72mm is 72mm, the lead length of 64mm is 64mm, and the lead length of 56mm is 56mm, which makes the moisture of the materials and impurities such as low molecular weight substances discharged.

The homogenization section consists of the following elements in sequence: the length of the lead is 96mm, the length of the lead is 72mm, the length of the lead is 64mm, the length of the lead is 56mm, the length of the lead is 72mm, the length of the lead is 64mm, the length of the lead is 56mm, the lead is used for conveying and pressurizing, certain pressure is established, materials at a die opening are enabled to have certain density, and meanwhile, the materials are further mixed, and finally, the purpose of smoothly extruding and granulating is achieved.

The invention effectively improves the practical efficiency of the combined screw by the targeted combined design of screw elements in different sections, is efficient and energy-saving, is used for a screw granulator, obviously improves the plasticizing effect of PET materials, improves the granulation yield by more than 2 times, prolongs the service life by more than 50 percent compared with the conventional machine type, has high comprehensive use benefit and is worthy of popularization and application.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.