CN101749406A - High-performance plastic-steel worm wheel made of montmorillonite/PA6 nano composite material and manufacturing method thereof - Google Patents
High-performance plastic-steel worm wheel made of montmorillonite/PA6 nano composite material and manufacturing method thereof Download PDFInfo
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- CN101749406A CN101749406A CN200910243247A CN200910243247A CN101749406A CN 101749406 A CN101749406 A CN 101749406A CN 200910243247 A CN200910243247 A CN 200910243247A CN 200910243247 A CN200910243247 A CN 200910243247A CN 101749406 A CN101749406 A CN 101749406A
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Abstract
The invention relates to a plastic-steel worm wheel manufacturing process, in particular to a high-performance plastic-steel worm wheel made of montmorillonite/PA6 nano composite material and a manufacturing method thereof. The method comprises the following steps: uniformly mixing dried PA6, modified montmorillonite, composite stabilizer, white oil and stearic acid in proportion, and preparing montmorillonite/PA6 nano composite material by adopting melting extrusion technique; then injection-molding the prepared montmorillonite/PA6 nano composite material into a die through an injection molding machine, so that montmorillonite/PA6 nano composite material is compounded with steel mold inserts to produce the high-performance plastic-steel worm wheel. Compared with the prior plastic-steel worm wheel, the high-performance plastic-steel worm wheel produced by the method has the advantages of larger size and higher bearing capacity.
Description
Technical field
The present invention relates to steel-mould the worm gear manufacturing process, be specifically related to the high-performance steel of a kind of Montmorilionite/PA6 nano composite material-mould worm gear and manufacture method thereof.
Background technique
High-performance steel-mould worm gear because have that comprehensive mechanical performance is good, in light weight, noise is little, corrosion-resistant, the advantage that is easy to process, also have good shock absorption, impact resistance, antifatigue and low noise performance simultaneously, replace the worm gear of making by metallic material such as copper, aluminium, be widely used in industry fields such as automobile, boats and ships, aviation, machinery, building, water conservancy and hydropower gradually.
Traditional steel-mould the worm gear material to adopt PA6, PA66, PA46, MC nylon, polyoxymethylene etc. to be the plastic matrix material of worm gear mostly.These material prices are relatively cheap, but have in various degree that low-temperature flexibility is poor, thermostability is bad, humidity effect is big, dimensional changes is big, shortcomings such as decreased performance is obvious under the high-load condition.
Montmorilionite (MMT) is the rich class natural clay mineral that produces of China, and it is a kind of phyllosilicate.Its structure lamella is a nanoscale, includes three subgrades, is embedded an alumina octahedral subgrade in the middle of two silicon-oxy tetrahedron subgrades, connects with covalent bond by shared oxygen atom between the subgrade, in conjunction with very firm.The about 1nm of total sheet bed thickness, the about 100nm of length and width, because the part aluminium atom in the alumina octahedral subgrade is replaced by the low price atom, subgrade has negative charge.Superfluous negative charge is by cation balances such as the Na+, the Ca2+ that are free on interlayer and Mg2+, therefore easily carry out ion-exchange reaction generation organic montmorillonite with alkyl quaternary ammonium salts or other organic cation, Montmorilionite after the exchange is lipophile, and the distance of interlayer increases.Organic nano imvite can further react with monomer or polymer melt, peels off the structure lamella into micron or nanoscale in the process of monomer polymerization or Mixing of Polymer Melt, evenly spreads in the polymeric matrix, thereby forms composite material.
Summary of the invention
The objective of the invention is at existing steel-mould the defective of worm gear, a kind of high-performance steel by Montmorilionite/PA6 nano composite material manufacturing-mould worm gear and manufacture method thereof is provided, make steel-mould worm gear can have more large scale and more high bearing capacity.
For achieving the above object, technological scheme of the present invention is as follows: the high-performance steel of a kind of Montmorilionite/PA6 nano composite material-mould worm gear, comprise the steel mold insert that is positioned at the middle part, and the injection moulding profile in the steel mold insert outside, wherein, described injection moulding profile is Montmorilionite/PA6 nano composite material, and the mass content of Montmorilionite is 4%～7% in Montmorilionite/PA6 nano composite material.
A kind of Montmorilionite/PA6 nano composite material manufacturing high-performance steel-mould the method for worm gear comprises the steps:
Step 3, Montmorilionite/PA6 nano composite material that step 2 is made are carried out injection moulding by injection machine to mould, make Montmorilionite/PA6 nano composite material compound with the steel mold insert that processes in advance, produce high-performance steel-mould worm gear.
Further, aforesaid Montmorilionite/PA6 nano composite material manufacturing high-performance steel-mould the method for worm gear, the process for preparing Montmorilionite/PA6 nano composite material in the step 2 is divided into following two steps:
(a) PA6 pellet, modified montmorillonoid, compound stabilizer, white oil, the stearic acid with drying mixes in proportion, and making the mass content of Montmorilionite in mixture is 15%～30%, and employing melt extrudes technology and makes the transition raw material;
(b) the transition raw material that step (a) is made, PA6 pellet, compound stabilizer, white oil, stearic acid mix in proportion, making the mass content of Montmorilionite in mixture is 4%～7%, and employing melt extrudes technology and makes Montmorilionite/PA6 nano composite material.
Further, aforesaid Montmorilionite/PA6 nano composite material manufacturing high-performance steel-mould the method for worm gear, the quality proportioning of various raw materials is as follows in the step (a): 70～85 parts of PA6 pellets, 15～30 parts of modified montmorillonoids, 0.2～0.5 part of compound stabilizer, 0.5～1 part of white oil, 0.1～0.5 part of stearic acid; The quality proportioning of various raw materials is as follows in the step (b): 30～50 parts of transition raw materials, 150～200 parts of PA6 pellets, 1.5～2 parts of compound stabilizers, 1～1.5 part of white oil, 0.5～1 part of stearic acid; Compound stabilizer comprises calcium-zinc composite stabilizing agent, heat stabilizer, fire retardant.
Beneficial effect of the present invention is as follows: the present invention is by preparation Montmorilionite/PA6 nano composite material, it is used for high-performance steel-the mould production of worm gear as raw material, prepared steel-mould worm gear has large scale more, higher bearing capacity, thereby overcome existing steel-mould the defective of worm gear, made novel steel-mould worm gear have more good thermal characteristics and mechanical property.
Description of drawings
Fig. 1 is high-performance steel-the mould worm gear arrangement schematic representation of Montmorilionite/PA6 nano composite material;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is high-performance steel-the mould manufacture method flow chart of worm gear of Montmorilionite/PA6 nano composite material.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As Fig. 1, shown in Figure 2, the high-performance steel of Montmorilionite provided by the present invention/PA6 nano composite material-mould worm gear comprises the steel mold insert 1 that is positioned at the middle part, and the injection moulding profile 2 in steel mold insert 1 outside, wherein, described injection moulding profile 2 is Montmorilionite/PA6 nano composite material, and Montmorilionite content is 4%～7% in Montmorilionite/PA6 nano composite material.
The manufacture method of the high-performance steel of Montmorilionite as shown in Figure 3 ,/PA6 nano composite material-mould worm gear comprises the steps:
Step S01 carries out pH value analysis, processing to the nano imvite raw material, measures the CEC value (interlayer exchangeable cations total amount) of raw material, selected imvite modified dose, modification is carried out in Montmorilionite handled.
Imvite modified dose can be adopted Cu, Co or Ni inorganic metal cation, organic anion surface active agents such as dodecyl sodium sulfate, lauryl sodium sulfate, alpha-alkene sulfonate or neopelex, and organic cation surface active agent such as hexadecylpyridinium chloride, softex kw, DTAB.
The modification treatment step is as follows:
1. get a certain amount of Montmorilionite and be scattered in the distilled water, be heated to uniform temperature;
2. use certain amount of H Cl acid for adjusting pH, stir a period of time, add a certain amount of modifier (metal ion, organic yin, yang ionic surface active agent), constant temperature stirs a period of time, natural cooling, and centrifugation is washed 2 times;
3. use the alcohol water blend of certain volume mark to wash again 1 time, vacuum drying is ground and is obtained modified montmorillonoid.
In the present embodiment, get 5g MMT original soil and be scattered in the 200mL distilled water, be heated to uniform temperature, with 0.2mol/L HCl acid for adjusting pH, stir a period of time, add 2.5% modifier, constant temperature stirs 3h.Natural cooling, centrifugation is washed 2 times, uses the alcohol water blend of 50% (volume fraction) to wash again 1 time, and vacuum drying is ground and is obtained modified montmorillonoid.
Step S02, is that 15%～30% ratio mixes with the PA6 (model 1013) of drying, modified montmorillonoid, compound stabilizer, white oil, stearic acid according to nano imvite content, the quality proportioning of various raw materials is as follows: 70～85 parts of PA6 pellets, 15～30 parts of modified montmorillonoids, 0.2～0.5 part of compound stabilizer, 0.5～1 part of white oil, 0.1～0.5 part of stearic acid, wherein, compound stabilizer comprises calcium-zinc composite stabilizing agent, heat stabilizer, fire retardant.Control each section temperature and rotating speeds such as double screw extruder head, machine barrel, barrel well, temperature range is 125 ℃～255 ℃, and the extruder rotating speed is 30r/min, adopts the way that melt extrudes to obtain the transition raw material.
Step S03, above-mentioned transition raw material, dry PA6, compound stabilizer, white oil, stearic acid are mixed according to the ratio of nano imvite content 4%～7%, the quality proportioning of various raw materials is as follows: 30～50 parts of transition raw materials, 150～200 parts of PA6 pellets, 1.5～2 parts of compound stabilizers, 1～1.5 part of white oil, 0.5～1 part of stearic acid, wherein, compound stabilizer comprises calcium-zinc composite stabilizing agent, heat stabilizer, fire retardant.Control each section temperature and rotating speeds such as double screw extruder head, machine barrel, barrel once more well, temperature range is 180～300 ℃, and the extruder rotating speed is 30r/min, adopts the way that melt extrudes to make nano imvite/PA6 composite material.With the feed particles that obtains in baking oven 100 ℃ dry 8 hours down.
Step S04 carries out injection moulding by injection machine to mould with the raw material that makes, and makes Montmorilionite/PA6 nano composite material and the steel mold insert that processes in advance compound, and producing with nano imvite/PA6 composite material is high-performance steel-the mould worm gear of raw material.
At high-performance steel of the present invention-mould worm gear, carried out following Performance Detection.
Though Montmorilionite/PA6 nano composite material has mechanical and physical performance preferably, can verify with calculating by experiment at aspects such as contact strength, flexural strengths, also exist two key factors of thermostability and humidity effect to determine its military service performance.This is because engineering plastics all can descend significantly in its mechanical property of back of being heated, and expanding can appear after being heated and absorbing water in the PA6 material simultaneously, influences its dimensional stability.Therefore detected performance of the present invention respectively by two groups of tests.
1. a collection of 15 detected worm gears are heated up and remained on 100 ℃ of conditions following 500 hours.After the taking-up, per 51 group, divide three groups to carry out tension, compression and the detection of flexural strength mechanical property rapidly, calculate according to the transmission power of worm-and-wheel gear, require tensile strength to be not less than 53.5Mpa; Compression strength is not less than 62.5Mpa; Flexural strength is not less than 58.7Mpa.
After testing, tensile strength is 61.4-57.1Mpa; Compression strength is 68.3-63.1Mpa; Flexural strength is 60.4-59.1Mpa, all meets the demands.
2. a collection of 10 detected worm gears are heated up and remain on 80 ℃, keep under the situation of envionmental humidity 90%, tested 1000 hours.After the taking-up, detect worm-gear toothing external diameter and flank profil rapidly and change.Consider machining error and gap adjustment, setting dimensional changes is defective above 40 μ m.
It is+37 μ m that whole after testing 10 tested worm gear external diameters change maximum value, and minimum is+33 μ m; Flank profil changes maximum+4 μ m, and minimum is 2 μ m, satisfies the requirement to the worm gear dimensional changes.
Claims (6)
1. the high-performance steel of Montmorilionite/PA6 nano composite material-mould worm gear, comprise the steel mold insert (1) that is positioned at the middle part, and the injection moulding profile (2) in the steel mold insert outside, it is characterized in that: described injection moulding profile (2) is Montmorilionite/PA6 nano composite material, and the mass content of Montmorilionite is 4%～7% in Montmorilionite/PA6 nano composite material.
2. a Montmorilionite/PA6 nano composite material is made high-performance steel-mould the method for worm gear, comprises the steps:
Step 1, the nano imvite raw material is carried out modification handle;
Step 2, the PA6 with drying, modified montmorillonoid, compound stabilizer, white oil, stearic acid mix in proportion, and employing melt extrudes technology and makes Montmorilionite/PA6 nano composite material;
Step 3, Montmorilionite/PA6 nano composite material that step 2 is made are carried out injection moulding by injection machine to mould, make Montmorilionite/PA6 nano composite material compound with the steel mold insert that processes in advance, produce high-performance steel-mould worm gear.
3. Montmorilionite as claimed in claim 2/PA6 nano composite material manufacturing high-performance steel-mould the method for worm gear, it is characterized in that: the process for preparing Montmorilionite/PA6 nano composite material in the step 2 is divided into following two steps:
(a) PA6 pellet, modified montmorillonoid, compound stabilizer, white oil, the stearic acid with drying mixes in proportion, and making the mass content of Montmorilionite in mixture is 15%～30%, and employing melt extrudes technology and makes the transition raw material;
(b) the transition raw material that step (a) is made, PA6 pellet, compound stabilizer, white oil, stearic acid mix in proportion, making the mass content of Montmorilionite in mixture is 4%～7%, and employing melt extrudes technology and makes Montmorilionite/PA6 nano composite material.
4. Montmorilionite as claimed in claim 3/PA6 nano composite material manufacturing high-performance steel-mould the method for worm gear, it is characterized in that: the quality proportioning of various raw materials is as follows in the step (a): 70～85 parts of PA6 pellets, 15～30 parts of modified montmorillonoids, 0.2～0.5 part of compound stabilizer, 0.5～1 part of white oil, 0.1～0.5 part of stearic acid.
5. make high-performance steel-mould the method for worm gear as claim 3 or 4 described Montmorilionites/PA6 nano composite material, it is characterized in that: the quality proportioning of various raw materials is as follows in the step (b): 30～50 parts of transition raw materials, 150～200 parts of PA6 pellets, 1.5～2 parts of compound stabilizers, 1～1.5 part of white oil, 0.5～1 part of stearic acid.
6. Montmorilionite as claimed in claim 5/PA6 nano composite material manufacturing high-performance steel-mould the method for worm gear, it is characterized in that: described compound stabilizer comprises calcium-zinc composite stabilizing agent, heat stabilizer, fire retardant.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928448A (en) * | 2010-08-16 | 2010-12-29 | 中国科学技术大学 | Nano composite flame-retardant reinforced polyester engineering plastic and preparation method thereof |
| CN108443312A (en) * | 2018-04-28 | 2018-08-24 | 周德志 | A kind of centrifuge running wheel |
-
2009
- 2009-12-29 CN CN2009102432475A patent/CN101749406B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928448A (en) * | 2010-08-16 | 2010-12-29 | 中国科学技术大学 | Nano composite flame-retardant reinforced polyester engineering plastic and preparation method thereof |
| CN101928448B (en) * | 2010-08-16 | 2013-03-13 | 中国科学技术大学 | Nano composite flame-retardant reinforced polyester engineering plastic and preparation method thereof |
| CN108443312A (en) * | 2018-04-28 | 2018-08-24 | 周德志 | A kind of centrifuge running wheel |
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| CN101749406B (en) | 2012-03-07 |
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Owner name: DONGGUAN YIFANG XINDA AUTOMOBILE TECHNOLOGY CO., L Free format text: FORMER OWNER: WU SHIJIAN QIAN ZHIQI Effective date: 20111209 |
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Effective date of registration: 20111209 Address after: 523560 science and technology innovation center, Changping Town, Dongguan Town, Guangdong, China Applicant after: Dongguan Jinghangda Electric Power Steering Systems Co., Ltd. Co-applicant after: Dongguan Yifang Xinda Automobile Technology Co., Ltd. Co-applicant after: Wu Shijian Co-applicant after: Qian Zhiqi Address before: 523560 science and technology innovation center, Changping Town, Dongguan Town, Guangdong, China Applicant before: Dongguan Jinghangda Electric Power Steering Systems Co., Ltd. Co-applicant before: Wu Shijian Co-applicant before: Qian Zhiqi |
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Granted publication date: 20120307 Termination date: 20121229 |