CN102173026B - Novel heat conducting composite material and LED (light emitting diode) shell composite injection molding process - Google Patents
Novel heat conducting composite material and LED (light emitting diode) shell composite injection molding process Download PDFInfo
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- CN102173026B CN102173026B CN201010608764.0A CN201010608764A CN102173026B CN 102173026 B CN102173026 B CN 102173026B CN 201010608764 A CN201010608764 A CN 201010608764A CN 102173026 B CN102173026 B CN 102173026B
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Abstract
The invention discloses a novel heat conducting composite material and an LED (light emitting diode) shell composite injection molding process. The process comprises the following steps of: A. raw material drying: weighing raw materials, and feeding the raw materials in a vacuum drier for vacuum drying; B. plasticizing: feeding the dried raw materials in the material cylinder of a screw rod type injection molding machine for plasticizing; C. putting an LED shell in a mold cavity of a closed mold of the screw rod type injection molding machine for injection molding; D. annealing: putting the LED shell obtained in the step C in an oven and standing still; and E. humidifying: putting the LED shell annealed in the step D in boiling water, and then taking out to obtain the finished product. The heat conducting composite material is injection-molded on the LED shell through injection molding process, thereby forming a plastic layer used as a radiator; as an insulating body, the radiator is safe to use, and the radiating property of the radiator is same as or even better than that of an aluminum radiator; and through the adoption of the injection molding process, the plastic radiator and the LED shell are combined more closely, and the process is simple and convenient.
Description
(1) technical field
The present invention relates to the composite injection molding technique of a kind of heat-conductive composite material and LED housing.
(2) background technology
LED illumination technology, due to its energy-conservation advantage, more and more becomes a kind of illumination trend.But LED illumination technology also exists shortcoming, i.e. heat dissipation problem, the heat produced when throwing light on due to LED is comparatively large, therefore how to solve the key that heat dissipation problem becomes LED illumination technical development.Generally all adopt Aluminium Radiator at present, its shortcoming also existed is: aluminium is conductive material, easily causes the electric current of LED to alter to Aluminium Radiator therefore security incident; Connection between Aluminium Radiator and LED housing also comparatively bothers, and bonding strength is not strong.
(3) summary of the invention
Adopting the above-mentioned deficiency of Aluminium Radiator in order to overcome existing LED, the invention provides the composite injection molding technique of a kind of Novel heat-conducting composite and LED housing.
The technical scheme that the present invention solves its technical problem is: the composite injection molding technique of a kind of Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%;
Consisting of of its Raw:
Polyhexamethylene adipamide: 46 ~ 91 weight portions,
Graphite: 5 ~ 25 weight portions,
Molybdenum bisuphide: 2 ~ 10 weight portions,
Nano-calcium carbonate: 0.5 ~ 2 weight portion,
Glass fibre: 2 ~ 15 weight portions,
Coupling agent: 0.5 ~ 5 weight portion,
Antioxidant: 1 ~ 2 weight portion,
Lubricant: 0.5 ~ 2 weight portion;
B. plastify: dropped into by dried raw material in the barrel of screw injection molding machine and plastify, make raw material become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C, and plasticizing back pressure is 2Mpa ~ 6Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die, heat-conductive composite material melt is full of cooling and shaping after die cavity, be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 6 ~ 8 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Recommend in step, the vacuum in vacuum drier is-94kpa ~-70Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 8 hours ~ 12 hours.
Be recommended in step C, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 95Mpa ~ 150Mpa.
Recommend in step, consisting of of raw material:
Polyhexamethylene adipamide: 91 weight portions,
Graphite: 6 weight portions,
Molybdenum bisuphide: 2 weight portions,
Nano-calcium carbonate: 1 weight portion,
Glass fibre: 2 weight portions,
Coupling agent: 0.5 weight portion,
Antioxidant: 1 weight portion,
Lubricant: 0.5 weight portion;
Wherein, coupling agent is silane coupler or titanate coupling agent or aluminate coupling agent, and antioxidant is antioxidant 1010 or antioxidant BHT or antioxidant BHA, and lubricant is stearic acid or butyl stearate or oleamide or ethylene bis stearamide.
Beneficial effect of the present invention is: be injected on LED housing by heat-conductive composite material by Shooting Technique, thus forms one deck plastics as radiator, and it is insulator, therefore uses safer, very nearly the same even better with Aluminium Radiator on heat dispersion; Shooting Technique is adopted to make the combination of plastic tank radiators and LED housing tightr, and simple process.
(4) detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail.
Embodiment one
A composite injection molding technique for Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%; Vacuum in the present embodiment in vacuum drier is-75Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 11 hours;
Consisting of of its Raw:
Polyhexamethylene adipamide: 91 weight portions,
Graphite: 6 weight portions,
Molybdenum bisuphide: 2 weight portions,
Nano-calcium carbonate: 1 weight portion,
Glass fibre: 2 weight portions,
Silane coupler as coupling agent: 0.5 weight portion,
Antioxidant BHT as antioxidant: 1 weight portion,
Oleamide as lubricant: 0.5 weight portion;
B. plastify: dried raw material is dropped in the barrel of screw injection molding machine and plastify, raw material is made to become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C and (accurately cannot controls at certain temperature spot by the temperature of barrel, the temperature of barrel is controlled within the scope of 200 DEG C ~ 230 DEG C), plasticizing back pressure is 3.5Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die:, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 120Mpa.
Heat-conductive composite material melt is full of cooling and shaping after die cavity, and be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 7 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Embodiment two
A composite injection molding technique for Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%; Vacuum in the present embodiment in vacuum drier is-94Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 9 hours;
Consisting of of its Raw:
Polyhexamethylene adipamide: 50 weight portions,
Graphite: 5 weight portions,
Molybdenum bisuphide: 10 weight portions,
Nano-calcium carbonate: 0.7 weight portion,
Glass fibre: 15 weight portions,
Titanate coupling agent as coupling agent: 3 weight portions,
Antioxidant 1010 as antioxidant: 1.2 weight portions,
Stearic acid as lubricant: 0.8 weight portion;
B. plastify: dried raw material is dropped in the barrel of screw injection molding machine and plastify, raw material is made to become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C and (accurately cannot controls at certain temperature spot by the temperature of barrel, the temperature of barrel is controlled within the scope of 200 DEG C ~ 230 DEG C), plasticizing back pressure is 2Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die:, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 100Mpa.
Heat-conductive composite material melt is full of cooling and shaping after die cavity, and be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 6 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Embodiment three
A composite injection molding technique for Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%; Vacuum in the present embodiment in vacuum drier is-90Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 10 hours;
Consisting of of its Raw:
Polyhexamethylene adipamide: 46 weight portions,
Graphite: 10 weight portions,
Molybdenum bisuphide: 8 weight portions,
Nano-calcium carbonate: 0.5 weight portion,
Glass fibre: 10 weight portions,
Aluminate coupling agent as coupling agent: 2 weight portions,
As the antioxidant BHA:1.5 weight portion of antioxidant,
Butyl stearate as lubricant: 1.5 weight portions;
B. plastify: dried raw material is dropped in the barrel of screw injection molding machine and plastify, raw material is made to become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C and (accurately cannot controls at certain temperature spot by the temperature of barrel, the temperature of barrel is controlled within the scope of 200 DEG C ~ 230 DEG C), plasticizing back pressure is 4Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die:, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 95Mpa.
Heat-conductive composite material melt is full of cooling and shaping after die cavity, and be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 8 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Embodiment four
A composite injection molding technique for Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%; Vacuum in the present embodiment in vacuum drier is-90Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 8 hours;
Consisting of of its Raw:
Polyhexamethylene adipamide: 60 weight portions,
Graphite: 25 weight portions,
Molybdenum bisuphide: 4 weight portions,
Nano-calcium carbonate: 2 weight portions,
Glass fibre: 8 weight portions,
Silane coupler as coupling agent: 5 weight portions,
Antioxidant BHT as antioxidant: 2 weight portions,
Ethylene bis stearamide as lubricant: 2 weight portions;
B. plastify: dried raw material is dropped in the barrel of screw injection molding machine and plastify, raw material is made to become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C and (accurately cannot controls at certain temperature spot by the temperature of barrel, the temperature of barrel is controlled within the scope of 200 DEG C ~ 230 DEG C), plasticizing back pressure is 6Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die:, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 150Mpa.
Heat-conductive composite material melt is full of cooling and shaping after die cavity, and be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 8 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Embodiment five
A composite injection molding technique for Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%; Vacuum in the present embodiment in vacuum drier is-80Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 11 hours;
Consisting of of its Raw:
Polyhexamethylene adipamide: 75 weight portions,
Graphite: 20 weight portions,
Molybdenum bisuphide: 5 weight portions,
Nano-calcium carbonate: 1.5 weight portions,
Glass fibre: 5 weight portions,
Silane coupler as coupling agent: 1.5 weight portions,
Antioxidant BHT as antioxidant: 1.3 weight portions,
Stearic acid as lubricant: 1.8 weight portions;
B. plastify: dried raw material is dropped in the barrel of screw injection molding machine and plastify, raw material is made to become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C and (accurately cannot controls at certain temperature spot by the temperature of barrel, the temperature of barrel is controlled within the scope of 200 DEG C ~ 230 DEG C), plasticizing back pressure is 3Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die:, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 110Mpa.
Heat-conductive composite material melt is full of cooling and shaping after die cavity, and be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 7 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Embodiment six
A composite injection molding technique for Novel heat-conducting composite and LED housing, comprises the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%; Vacuum in the present embodiment in vacuum drier is-85Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 10 hours;
Consisting of of its Raw:
Polyhexamethylene adipamide: 80 weight portions,
Graphite: 16 weight portions,
Molybdenum bisuphide: 7 weight portions,
Nano-calcium carbonate: 0.8 weight portion,
Glass fibre: 13 weight portions,
Titanate coupling agent as coupling agent: 1 weight portion,
As the antioxidant BHA:1.7 weight portion of antioxidant,
Butyl stearate as lubricant: 0.7 weight portion;
B. plastify: dried raw material is dropped in the barrel of screw injection molding machine and plastify, raw material is made to become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C and (accurately cannot controls at certain temperature spot by the temperature of barrel, the temperature of barrel is controlled within the scope of 200 DEG C ~ 230 DEG C), plasticizing back pressure is 5Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die:, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 140Mpa.
Heat-conductive composite material melt is full of cooling and shaping after die cavity, and be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 6 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out.
Claims (5)
1. a composite injection molding technique for Novel heat-conducting composite and LED housing, is characterized in that comprising the following steps:
A. raw material drying: take raw material, drops into raw material in vacuum drier and carries out vacuum drying, makes the water content of raw material be down to less than 0.2%;
Consisting of of its Raw:
Polyhexamethylene adipamide: 46 ~ 91 weight portions,
Graphite: 5 ~ 25 weight portions,
Molybdenum bisuphide: 2 ~ 10 weight portions,
Nano-calcium carbonate: 0.5 ~ 2 weight portion,
Glass fibre: 2 ~ 15 weight portions,
Coupling agent: 0.5 ~ 5 weight portion,
Antioxidant: 1 ~ 2 weight portion,
Lubricant: 0.5 ~ 2 weight portion;
B. plastify: dropped into by dried raw material in the barrel of screw injection molding machine and plastify, make raw material become the heat-conductive composite material melt of molten condition, the temperature of barrel is 200 DEG C ~ 230 DEG C, and plasticizing back pressure is 2Mpa ~ 6Mpa;
C. LED housing is positioned in the die cavity of close die of screw injection molding machine, the temperature of close die is 70 DEG C ~ 90 DEG C, heat-conductive composite material melt after being plastified by step B injects the die cavity of described close die, heat-conductive composite material melt is full of cooling and shaping after die cavity, be injected into by heat-conductive composite material melt on LED housing, die sinking obtains LED shell products;
D. anneal: LED shell products obtained in step C is put into baking oven and leaves standstill 6 ~ 8 hours, the temperature of baking oven remains on 90 DEG C ~ 100 DEG C;
E. damping: the LED shell products after annealing in step D is put into boiling water, then obtain finished product after taking out;
Wherein, coupling agent is silane coupler or titanate coupling agent or aluminate coupling agent, and antioxidant is antioxidant 1010 or antioxidant BHT or antioxidant BHA, and lubricant is stearic acid or butyl stearate or oleamide or ethylene bis stearamide.
2. the composite injection molding technique of Novel heat-conducting composite as claimed in claim 1 and LED housing, it is characterized in that: in step, vacuum in vacuum drier is-94kpa ~-70Kpa, and vacuum drying temperature is 90 DEG C ~ 100 DEG C, and the vacuum drying time is 8 hours ~ 12 hours.
3. the composite injection molding technique of Novel heat-conducting composite as claimed in claim 1 or 2 and LED housing, it is characterized in that: in step C, heat-conductive composite material melt injects the die cavity of close die successively through nozzle, runner and cast gate, injection pressure is 95Mpa ~ 150Mpa.
4. the composite injection molding technique of Novel heat-conducting composite as claimed in claim 1 or 2 and LED housing, is characterized in that: in step, consisting of of raw material:
Polyhexamethylene adipamide: 91 weight portions,
Graphite: 6 weight portions,
Molybdenum bisuphide: 2 weight portions,
Nano-calcium carbonate: 1 weight portion,
Glass fibre: 2 weight portions,
Coupling agent: 0.5 weight portion,
Antioxidant: 1 weight portion,
Lubricant: 0.5 weight portion.
5. the composite injection molding technique of Novel heat-conducting composite as claimed in claim 3 and LED housing, is characterized in that: in step, consisting of of raw material:
Polyhexamethylene adipamide: 91 weight portions,
Graphite: 6 weight portions,
Molybdenum bisuphide: 2 weight portions,
Nano-calcium carbonate: 1 weight portion,
Glass fibre: 2 weight portions,
Coupling agent: 0.5 weight portion,
Antioxidant: 1 weight portion,
Lubricant: 0.5 weight portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010608764.0A CN102173026B (en) | 2010-12-16 | 2010-12-16 | Novel heat conducting composite material and LED (light emitting diode) shell composite injection molding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010608764.0A CN102173026B (en) | 2010-12-16 | 2010-12-16 | Novel heat conducting composite material and LED (light emitting diode) shell composite injection molding process |
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| CN102173026B true CN102173026B (en) | 2015-01-14 |
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| CN103342891B (en) * | 2013-07-03 | 2015-08-12 | 中山市永威新材料有限公司 | Heat conductive plastic material of a kind of high-performance refractory and preparation method thereof |
| CN104227915A (en) * | 2014-07-24 | 2014-12-24 | 镇江洋溢汽车部件有限公司 | Plastic shell manufacturing technique |
| CN104497542B (en) * | 2014-12-08 | 2016-04-27 | 国家电网公司 | A kind of preparation technology of power capacitor casing |
| CN105037866A (en) * | 2015-04-28 | 2015-11-11 | 桐城市新丰彩印包装有限公司 | Degradable thin film preparation process |
| CN105419322A (en) * | 2015-12-08 | 2016-03-23 | 安徽天瑞塑业有限公司 | Nylon abrasive filament and manufacturing method thereof |
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| CN105860518A (en) * | 2016-04-29 | 2016-08-17 | 安徽安缆模具有限公司 | Molybdenum-disulfide-modified nylon mold and preparation method thereof |
| CN105820564A (en) * | 2016-04-29 | 2016-08-03 | 安徽安缆模具有限公司 | Silane modified nylon mould material and preparation method thereof |
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| CN105838065A (en) * | 2016-04-29 | 2016-08-10 | 安徽安缆模具有限公司 | Antistatic polyamide mold material and preparing method thereof |
| CN105924959A (en) * | 2016-06-06 | 2016-09-07 | 淮南曹庵润龙塑业有限公司 | Heat-resistant nylon die material and preparation method thereof |
| CN106046775A (en) * | 2016-06-06 | 2016-10-26 | 淮南曹庵润龙塑业有限公司 | Easily molding nylon mold material and preparation method thereof |
| CN106084765A (en) * | 2016-06-06 | 2016-11-09 | 淮南曹庵润龙塑业有限公司 | A kind of fire-retardant nylon mold materials and preparation method thereof |
| CN113146927B (en) * | 2020-11-23 | 2023-05-09 | 太仓丹妮尔模塑汽配有限公司 | Pressurized quick injection molding process for antistatic household appliance structural part |
| CN112571715A (en) * | 2020-12-18 | 2021-03-30 | 昆山市杰尔电子科技股份有限公司 | Environment-friendly forming process for notebook computer shell |
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| CN1043776A (en) * | 1988-12-28 | 1990-07-11 | 黄根宝 | Self-lubricating bearing material |
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| MXPA02001090A (en) * | 1999-07-30 | 2003-07-21 | Ppg Ind Ohio Inc | Impregnated glass fiber strands and products including the same. |
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|---|---|---|---|---|
| CN1043776A (en) * | 1988-12-28 | 1990-07-11 | 黄根宝 | Self-lubricating bearing material |
| CN1295542A (en) * | 1998-03-03 | 2001-05-16 | Ppg工业俄亥俄公司 | Inorganic lubricant-coated glass fiber strands and products including the same |
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