Screw assembly of glass fiber mineral reinforced polyphenylene sulfide composite material

Abstract

The utility model discloses a screw assembly of a glass fiber mineral reinforced polyphenylene sulfide composite material, which comprises two screws which are meshed with each other and have the same structure, and each screw comprises a material conveying and melting section, a mixing section, a mineral powder mixing section, a glass fiber mixing section and a vacuum exhaust and compaction conveying section; the material conveying and melting section, the mixing section, the mineral powder mixing section, the glass fiber mixing section and the vacuum exhausting and compacting conveying section are sequentially connected with one another from left to right and are integrally formed. According to the utility model, the problem that mineral powder filling and glass fiber filling are difficult to share one set of screw combination in the production process is solved, the time for replacing the screw is saved, the production efficiency of an extruder is improved, the dispersion of glass fibers and minerals is improved, and the comprehensive performance of a product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to modified material processing technical field, concretely is a kind of screw combination of glass fiber mineral reinforced polyphenylene sulfide composite. BACKGROUND

[0002] Glass fiber mineral reinforced polyphenylene sulfide composite is also called glass mineral fiber reinforced PPS material, because it has excellent high-temperature resistance, corrosion resistance, wear resistance, high strength, flame-retardant V0 and other characteristics, it can be used as the substitute of metal, copper, aluminum, iron, so it is widely used in electronic appliances, automobile industry, mechanization chemical industry, aerospace, textile industry, bathroom and other fields, and screw extruder is needed in the process of glass mineral fiber reinforced PPS material processing.

[0003] For mineral powder filled modified polyphenylene sulfide material, strong screw shear strength is needed to crush mineral powder and make it evenly distributed in polyphenylene sulfide matrix to achieve optimal performance, but for glass fiber filled modified polyphenylene sulfide material, weak shear strength and strong glass fiber distribution ability are needed to maximize the length of glass fiber and make it evenly distributed in polyphenylene sulfide matrix to achieve optimal performance. In order to achieve the excellent product performance of different filling systems, screw combination needs to be adjusted. For the same extruder, mineral powder or glass fiber modified polyphenylene sulfide is often needed to be disassembled and replaced with screw elements with adjusted shear strength. For mineral powder and glass fiber filled modified polyphenylene sulfide, especially high proportion filled system, the screw combination of prior art is difficult to achieve.

[0004] Therefore, it is necessary to provide a new screw combination to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a screw combination of glass fiber mineral reinforced polyphenylene sulfide composite that can better obtain excellent performance of glass fiber mineral reinforced polyphenylene sulfide product to solve the problems in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A kind of screw combination of glass fiber mineral reinforced polyphenylene sulfide composite material, including two same direction rotating double screws, two screw structures are same, meshing and having 90 degrees phase difference between each other;Each screw is composed of spline shaft, multiple groups of thread block and kneading block sleeved on spline shaft, thread block and kneading block are alternately arranged, thread block has large lead, small lead, and is distributed in different positions, and kneading block is composed of 30 °, 45 °, 90 ° and so on Kneading block and reverse thread block etc., the screw is sequentially divided into: conveying section, melting section, mixing section, mineral powder mixing section, glass fiber mixing section, vacuum exhaust section and compaction conveying section along the material flow direction.

[0008] Further, the screw of the conveying section sequentially includes the following thread elements: 15 / 30A, 40 / 90, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30.In conveying section, large lead thread block is used, which provides sufficient conveying capacity for material, makes material discharge smoothly, avoids material blocking in discharge port, and the gradual design of conveying section makes material be fully compressed and effectively enter melting section.

[0009] Further, the screw of the melting section sequentially includes the following thread elements: KB30 / 5 / 30, KB30 / 5 / 45, KS10A / F, KS10M, KS10M, KS10M, KS10F / A, 20 / 30L, 30 / 30, 40 / 30, 40 / 30, 40 / 30.Melting section uses kneading fast and thread block alternately arranged, 1 30 ° and 1 45 °, 5 single piece block, shear from strong to weak, high shear efficiency in the first half section makes material fully melt, and reducing heat generation in the second half section facilitates mineral powder discharge and mixing.

[0010] Further, the screw of the mineral powder mixing section sequentially includes the following thread elements: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, KB30 / 5 / 45, 30 / 30.By setting sufficient conveying block and shear block, alternately arranged, melt material and mineral powder are again concentrated and dispersed, forming uniform structure, and the number of meshing discs is continuously increased to continuously improve the shear speed of material, and then continuously improve the dispersion and mixing capacity of material.

[0011] Further, the screw thread elements of the glass fiber mixing section of the screw rod in sequence include the following: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, ZME15 / 30, ZME15 / 30, ZME20 / 30L, 30 / 30, 30 / 30. By arranging sufficient conveying blocks, shearing blocks and toothed mixing screw thread elements, which are alternately arranged, the material is fully melted, and the friction with the glass fiber is reduced, wherein the ZME15 / 30, ZME15 / 30 and ZME20 / 30L are toothed mixing screw thread elements, which are beneficial to the dispersion of the glass fiber and do not cause excessive shearing of the glass fiber. The ZME20 / 30L is a reverse screw thread block, and the reverse screw thread ZME20 / 30L can improve the time for material dispersion and distribution mixing, improve the distribution and dispersion effect, and is beneficial to the coating of the material on the glass fiber, so that the material performance is more stable.

[0012] Further, the screw thread elements of the vacuum exhaust section of the screw rod in sequence include the following: 40 / 30, 40 / 30. The exhaust section mainly discharges gas and small molecular substances in the high-pressure discharge system. The high lead screw block is adopted to improve the material melting space, which is beneficial to the gas discharge.

[0013] Further, the screw thread elements of the compact conveying section of the screw rod in sequence include the following: 40 / 30, 40 / 30, 30 / 30, 30 / 30. The compression section is mainly used for conveying and pressurizing, and the gradually changing design is adopted, the screw thread spacing is gradually reduced, the material is compacted, a certain density is formed, a certain head pressure is established, and then the material is stably discharged.

[0014] Compared with the prior art, the screw rod combination has the following advantages:

[0015] The effective arrangement of the screw thread blocks, shearing blocks and toothed screw thread elements on the screw rod of the screw rod combination has the following advantages:

[0016] (1) The glass fiber is fully sheared in the screw rod, and reaches a suitable length, thereby improving the comprehensive performance of the product;

[0017] (2) The glass fiber and the filler are fully dispersed and distributed, the stability of the material is maintained, and the dimensional stability of the material is improved;

[0018] (3) The mineral powder filling and the glass fiber filling can fully share one set of screw rod combination, the time for replacing the screw rod is saved, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure diagram of a single screw rod in a screw rod combination of a glass fiber mineral reinforced polyphenylene sulfide composite material.

[0020] Figure 2 It is a structure diagram of a single screw rod in a screw rod combination of a glass fiber mineral reinforced polyphenylene sulfide composite material.Figure 1 schematic diagram of the screw of the middle conveying section and the melting section

[0021] Figure 3 for Figure 1 schematic diagram of the middle mineral powder mixing section and the glass fiber mixing section

[0022] Figure 4 for Figure 1 schematic diagram of the screw of the middle material gas section, the vacuum exhaust section, and the melting section and the compacting conveying section

[0023] Figure 1 C1-C12, which is a heating zone of the first section to the twelfth section in the extruder. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-4 A screw combination of a glass fiber mineral reinforced polyphenylene sulfide composite material comprises two same-direction rotating double screws, the two screws are the same in structure, are meshed with each other and have a phase difference of 90 degrees between each other; each screw is composed of a spline shaft, a plurality of groups of thread blocks and kneading blocks sleeved on the spline shaft, the thread blocks and the kneading blocks are alternately arranged, the thread blocks have large leads and small leads and are distributed at different positions, the kneading blocks are composed of 30°, 45°, 90° and the like and reverse thread blocks, and the screw is sequentially divided into a conveying section, a melting section, a mixing section, a mineral powder mixing section, a glass fiber mixing section, a vacuum exhaust section and a compacting conveying section along a material flow direction.

[0026] The screw of the conveying section comprises the following thread elements in sequence: 15 / 30A, 40 / 90, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30. Large lead thread blocks are adopted in the conveying section, sufficient conveying capacity is provided for the material, the material is smoothly discharged, and the discharge port is prevented from being blocked, and the conveying section adopts a gradual change design, so that the material is fully compressed and effectively enters the melting section.

[0027] The screw of the melting section comprises the following thread elements in sequence: KB30 / 5 / 30, KB30 / 5 / 45, KS10A / F, KS10M, KS10M, KS10M, KS10F / A, 20 / 30L, 30 / 30, 40 / 30, 40 / 30, 40 / 30. The melting section adopts the arrangement of kneading fast and thread blocks alternately, 1 30° and 1 45°, 5 single-piece blocks, the shear is from strong to weak, the high shear efficiency in the first half section makes the material melt sufficiently, and the reduced heat quantity in the second half section facilitates the discharge and mixing of the mineral powder.

[0028] The screw of the mineral powder mixing section comprises the following thread elements in sequence: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, KB30 / 5 / 45, 30 / 30. By setting sufficient conveying blocks and shear blocks, which are arranged alternately, the molten material and the mineral powder are concentratedly sheared and dispersed again, forming a uniform structure, and the shear speed of the material is continuously increased by the increasing number of meshing discs, thereby continuously improving the dispersion and mixing capacity of the material.

[0029] The screw of the glass fiber mixing section comprises the following thread elements in sequence: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, ZME15 / 30, ZME15 / 30, ZME20 / 30L, 30 / 30, 30 / 30. By setting sufficient conveying blocks, shear blocks and tooth-shaped mixing thread elements, which are arranged alternately, the material is sufficiently melted, and the friction with the glass fiber is reduced, wherein the ZME15 / 30, ZME15 / 30 and ZME20 / 30L are tooth-shaped mixing thread elements, which are beneficial to the dispersion of the glass fiber without excessive shearing of the glass fiber. The ZME20 / 30L is a reverse thread block, and the reverse thread ZME20 / 30L can improve the dispersion and distribution mixing time of the material, improve the distribution and dispersion effect, and is beneficial to the coating of the material on the glass fiber, so that the material performance is more stable.

[0030] The screw of the vacuum exhaust section comprises the following thread elements in sequence: 40 / 30, 40 / 30. The exhaust section mainly discharges the gas and small molecular substances in the high-pressure discharge system. The high lead thread block is adopted to increase the melt space, which is beneficial to the gas discharge.

[0031] The screw of the compacting and conveying section comprises the following thread elements in sequence: 40 / 30, 40 / 30, 30 / 30, 30 / 30. The compression section is mainly for conveying and pressurizing, and adopts a gradual change design, the thread spacing gradually decreases, the material is compacted, a certain density is formed, a certain head pressure is established, so that the material stably flows out.

[0032] The technical effects of the present application are further explained below by more specific examples, but do not constitute any limitation. The raw material information used in the following examples is as follows:

[0033] Raw materials Manufacturers Polyphenylene sulfide Zhejiang Xinhengcheng Co., Ltd. Talc Quanzhou Xufeng Powder Raw Material Co., Ltd. Glass fiber China Giant Stone Co., Ltd.

[0034] The tensile properties in the examples were tested according to standard ISO 527 with a sample size of 170mm x 10mm x 4mm and a tensile rate of 50mm / min; the bending properties were tested according to standard ISO 178 with a sample size of 80mm x 10mm x 4mm; the impact strength was tested according to standard ISO 179 with a simple supported beam and a sample size of 80mm x 10mm x 4mm and an A-type notch.

[0035] Screw combination Figure 1 As shown, it comprises two co-rotating twin screws, the two screws are the same in structure, are engaged with each other and have a phase difference of 90 degrees between each other; each screw is composed of a spline shaft, a plurality of thread blocks and kneading blocks sleeved on the spline shaft, the thread blocks and the kneading blocks are arranged alternately, the thread blocks have large and small leads and are distributed at different positions, the kneading blocks are composed of 30°, 45°, 90° and reverse thread blocks, and the screw is sequentially divided into a conveying section, a melting section, a mixing section, a mineral powder mixing section, a glass fiber mixing section, a vacuum exhaust section and a compacting conveying section along the material flow direction.

[0036] The screw of the conveying section sequentially comprises the following thread elements: 15 / 30A, 40 / 90, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30.

[0037] The screw of the melting section sequentially comprises the following thread elements: KB30 / 5 / 30, KB30 / 5 / 45, KS10A / F, KS10M, KS10M, KS10M, KS10F / A, 20 / 30L, 30 / 30, 40 / 30, 40 / 30, 40 / 30.

[0038] The screw of the mineral powder mixing section sequentially comprises the following thread elements: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, KB30 / 5 / 45, 30 / 30.

[0039] The screw of the glass fiber mixing section sequentially comprises the following thread elements: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, ZME15 / 30, ZME15 / 30, ZME20 / 30L, 30 / 30, 30 / 30.

[0040] The screw of the vacuum exhaust section sequentially comprises the following thread elements: 40 / 30, 40 / 30.

[0041] The screw of the compacting conveying section comprises the following thread elements in sequence: 40 / 30, 40 / 30, 30 / 30, 30 / 30.

[0042] Example 1

[0043] The main components and their amounts are as follows:

[0044] Polyphenylene sulfide 3450 60%;

[0045] Glass fiber 584 40%.

[0046] The polyphenylene sulfide material is added through the main feeding port of the twin-screw extruder; the glass fiber is added through the glass fiber feeding port of the twin-screw extruder; the screw temperature is set in sections from the feeding port to the head as 250℃, 280℃, 280℃, 290℃, 290℃, 285℃, 285℃, 290℃, 290℃, 280℃, 280℃, 300℃, and the rotating speed is 300 rpm.

[0047] Example 2

[0048] The main components and their amounts are as follows:

[0049] Polyphenylene sulfide 3450 35%;

[0050] Talc BHS-1250A 20%;

[0051] Glass fiber 584 45%.

[0052] The polyphenylene sulfide material is added through the main feeding port of the twin-screw extruder; the glass fiber is added through the glass fiber feeding port of the twin-screw extruder; the talc is added through the mineral powder feeding port of the twin-screw extruder; the screw temperature is set in sections from the feeding port to the head as 250℃, 280℃, 280℃, 290℃, 290℃, 285℃, 285℃, 290℃, 290℃, 280℃, 280℃, 300℃, and the rotating speed is 250 rpm.

[0053] Example 3

[0054] The main components and their amounts are as follows:

[0055] Polyphenylene sulfide 3450 50%;

[0056] Talc BHS-1250A 50%.

[0057] The polyphenylene sulfide material is added through the main feeding port of the twin-screw extruder; the talc is added through the ore powder feeding port of the twin-screw extruder; the screw temperature is set in sections from the feeding port to the head as 250℃, 280℃, 280℃, 290℃, 290℃, 285℃, 285℃, 290℃, 290℃, 280℃, 280℃, 300℃, and the rotating speed is 400 rpm.

[0058] The related performance results of the ore powder and glass fiber filled modified polyphenylene sulfide composite materials prepared in the examples are listed in Table 1.

[0059]

[0060] In the description of the utility model, it is to be explained that, the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, it is also to be explained that, unless otherwise explicitly specified and limited, the terms "arrange", "connect" and the like should be understood broadly, for example, "connect" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A screw combination for glass mineral reinforced polyphenylene sulfide composites, comprising two co-rotating twin screws, the two screws having the same structure and being intermeshed, and having a phase difference of 90 degrees between each other; characterized in that, Each screw rod is composed of a spline shaft, a plurality of groups of thread blocks and kneading blocks sleeved on the spline shaft, the thread blocks and the kneading blocks are arranged alternately, and the screw rod is sequentially divided into a conveying section, a melting section, a mixing section, a mineral powder mixing section, a glass fiber mixing section, a vacuum exhaust section and a compacting and conveying section along a material flow direction; The screw rod of the conveying section sequentially comprises the following thread elements: 15 / 30A, 40 / 90, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30; large lead thread blocks are adopted in the conveying section to provide sufficient conveying capacity for the material, so that the material can be smoothly discharged, and the discharge port is prevented from being blocked; the conveying section adopts a gradual change design, so that the material is fully compressed and effectively enters the melting section; The screw rod of the melting section sequentially comprises the following thread elements: KB30 / 5 / 30, KB30 / 5 / 45, KS10A / F, KS10M, KS10M, KS10M, KS10F / A, 20 / 30L, 30 / 30, 40 / 30, 40 / 30, 40 / 30; the melting section adopts kneading blocks and thread blocks arranged alternately, 1 30° and 1 45°, 5 single-piece blocks, the shear is from strong to weak, the high shear efficiency in the front half section makes the material fully melt, and the reduced heat generation in the rear half section facilitates the discharge and mixing of the mineral powder; The screw rod of the mineral powder mixing section sequentially comprises the following thread elements: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, KB30 / 5 / 45, 30 / 30; by arranging sufficient conveying blocks and shear blocks alternately, the molten material and the mineral powder are again concentrated, sheared and dispersed, forming a uniform structure, and the shear speed of the material is continuously increased by the increasing number of meshing discs, thereby continuously improving the dispersion and mixing capacity of the material; The screw rod of the glass fiber mixing section sequentially comprises the following thread elements: 40 / 30, 40 / 30, 40 / 30, 40 / 30, 30 / 30, KB30 / 5 / 30, ZME15 / 30, ZME15 / 30, ZME20 / 30L, 30 / 30, 30 / 30; by arranging sufficient conveying blocks, shear blocks and tooth-shaped mixing thread elements alternately, the material is fully melted, and the friction with the glass fiber is reduced, wherein the ZME15 / 30, ZME15 / 30 and ZME20 / 30L are tooth-shaped mixing thread elements, which are beneficial to the dispersion of the glass fiber without excessive shearing of the glass fiber; the ZME20 / 30L is a reverse thread block, the reverse thread ZME20 / 30L can improve the dispersion and distribution mixing time of the material, improve the distribution and dispersion effect, and is beneficial to the coating of the material on the glass fiber, so that the material performance is more stable; The screw rod of the vacuum exhaust section sequentially comprises the following thread elements: 40 / 30, 40 / 30; high lead thread blocks are adopted to increase the melting space and facilitate gas exhaust. The screw of the compacting conveying section comprises the following thread elements in sequence: 40 / 30, 40 / 30, 30 / 30, 30 / 30; the compression section is mainly for conveying and pressurizing, and adopts a gradual change design, the thread spacing is gradually reduced, the material is compacted, and the material is stably discharged.

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