CN204604751U - Based on Graphene coating rapid thermal cycles Coinjection molding apparatus - Google Patents
Based on Graphene coating rapid thermal cycles Coinjection molding apparatus Download PDFInfo
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- CN204604751U CN204604751U CN201520217423.9U CN201520217423U CN204604751U CN 204604751 U CN204604751 U CN 204604751U CN 201520217423 U CN201520217423 U CN 201520217423U CN 204604751 U CN204604751 U CN 204604751U
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Abstract
The utility model discloses based on Graphene coating rapid thermal cycles Coinjection molding apparatus, comprise polymer plasticization injection device, mold closing mechanism, mould and frame, described mould includes location, guiding, die cavity and Graphene coating rapid thermal cycles device, and Graphene coating rapid thermal cycles device comprises silica-based Graphene coating, dc source, cooling water pipeline, thermocouple and temperature control system device; Metal die mold cavity surface is distributed with silica-based Graphene coating; Dc source is connected to form electric power loop by the two ends of copper electrode and Graphene coating; Thermocouple distribution is near the position of metal die mold cavity surface; Temperature control system is connected with dc source and cooling water control valve.Graphene coating of the present utility model remains the physical characteristic of the height heat conduction of Graphene monomer and high connductivity, and Graphene coating fine and close continuously can be used as film resistor heater and drives realization to follow complicated die mold cavity surface shape conformal rapid thermal cycles injection molding process by external power source.
Description
Technical field
The utility model belongs to the injection molding technology field of materials processing subject, particularly relates to rapid thermal cycles injection molding technology.
Background technology
Along with the development of the industry such as micro electronmechanical, automobile, building, Aero-Space, people propose energy-saving and environmental protection, the requirement such as attractive in appearance, comfortable to industrial products, therefore more attractive in appearance towards appearance for plastic products, wall thickness is thinner, quality is lighter, structure is more accurate, the more excellent future development of optical property.Injection mo(u)lding processing, as a kind of most widely used plastic working method, needs by constantly technological innovation, to meet the demand of market development.In recent years, a kind of new injection moulding process technology and rapid thermal cycles injection molding technology is proposed.Compared with traditional injection moulding forming technique, this technology can effectively alleviate even eliminates the defect such as injection molding product weld marks, current mark, streamline, injection trace, moire, floating fibre, low gloss, and energy significantly improving product exterior quality, make product height light highlighted, thus the secondary operations operation such as polishing, spraying, Lacquer finish avoided to product in conventional injection moulding production procedure, while significantly shortening production flow process, reduce the production cost of product.In addition, this technology significantly promotes the mobility of melt in die cavity, avoid the formation of melt condensate layer in mold cavity, improve the ability of filling melt die cavity, the accurate injection realizing 3 D complex structure, superthin structure and micro-nano structure is shaped, reduce product internal stress simultaneously, improve the shape and size precision of product.In a word, rapid thermal cycles injection molding technology is a kind of advanced injection moulding new technology considering products appearance, ambient influnence and resource consumption, effectively can improve the quality of product, improve the fineness of product surface, remarkable reduction environmental pollution, improve resource utilization, reduce production cost, reach the target of coordination optimization economic benefit and social benefit.
The mode of heating of rapid thermal cycles injection molding technology is broadly divided into mold integral heating technique and the large class of mold cavity surface heating technique two.Mold integral heating technique refers to thermal source from mould inside indirect mould mold cavity surface, also heated mold integral or most of local while heating mould die cavity.Current mold integral heating technique is based on Steam Heating rapid thermal cycles injection molding technology, because steam source distance mold cavity surface has certain distance, the temperature rise rate causing mold cavity surface is not etc., cause surface temperature distribution uneven, therefore the efficiency of heating surface is low, heating effect is not good and waste energy.Traditional mold cavity surface heating technique refers to the direct heating mould mold cavity surface of thermal source, as flame heating, eddy-current heating, Steam Heating etc., its advantage is that the efficiency of heating surface is high, its shortcoming is that traditional mold cavity surface heating technique is easily polluted mold cavity surface, is difficult to ensure the heating uniformity of die cavity, and therefore application scenario is extremely limited.
Utility model content
The defect of the pollution die cavity that the utility model exists for traditional mold cavity surface rapid thermal cycles injection molding technology and thermal uniformity difference, the rapid thermal cycles injection molding technology of a kind of new mold cavity surface heating is proposed, based on Graphene coating rapid thermal cycles injection molding technology, this technology can significantly improve the heating rate of mold cavity surface, avoid polluting mold cavity, the thermal uniformity of die cavity can be promoted, simultaneously can the injection mo(u)lding requirement of meeting requirements on three-dimensional labyrinth, superthin structure and micro-nano structure.
This technical application is novel to be realized by following technical solution:
Based on Graphene coating rapid thermal cycles Coinjection molding apparatus, comprise polymer plasticization injection device, mold closing mechanism, mould and frame, polymer plasticization injection device and mold closing mechanism are fixed in frame, mould is arranged between the template of mold closing mechanism, polymer plasticization injection device is to injection of polymer melt in mould, mold closing mechanism controls the folding of mould, mould includes location, guiding, die cavity and Graphene coating rapid thermal cycles device, Graphene coating rapid thermal cycles device comprises silica-based Graphene coating, dc source, cooling water pipeline, thermocouple and temperature control system device, mold cavity is distributed with silica-based Graphene coating on the surface, dc source is connected to form electric power loop by the two ends of copper electrode and Graphene coating, thermocouple distribution is near the position of mold cavity surface, thermocouple is connected with temperature control system, temperature control system is connected with dc source and cooling water control valve.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, described silica-based Graphene coating is distributed in mold cavity surface, silica-based wherein in silica-based Graphene coating is as transition zone at mold cavity plated surface silica, the coating of silica plates the nano level Graphene coating of one deck, or adopt elemental silicon to make mold cavity module, plate Graphene coating on the surface in silicon type chamber.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, described Graphene coating adopts chemical vapour deposition (CVD) (Chemical Vapor Deposition, CVD) method prepares on mold cavity surface the continuous densification that formed by Graphene monomer and the controlled Graphene coating of thickness, mode wherein between Graphene monomer and Graphene monomer, all by chemical bonding between Graphene monomer and base material guarantees that coating has enough adhesions, and thickness is only 45nm.
The utility model, based on Graphene coating rapid thermal cycles Coinjection molding apparatus, carrys out Real-time Collection by the thermocouple of mold cavity near surface and feeds back the temperature of mold cavity surface.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, and described temperature control system is divided into heating-up section, insulating sections and cooling part.Described heating-up section is connected with programmable DC power supply, and programmable DC power supply applies voltage to Graphene coating two ends, the temperature feedback collected by thermocouple, graphenic surface temperature is risen to optimum temperature during melt injection; Described insulating sections is connected with programmable DC power supply, programmable DC power supply applies voltage to Graphene coating two ends, by the temperature feedback that thermocouple collects, the mold cavity surface temperature of Graphene coating is kept injection optimum temperature until injection packing stage; Described cooling part is connected with programmable DC power supply and cooling water control valve, and cooling system, by programmable DC power-off, is opened cooling water control valve and die cavity temperature is reduced to calcining temperature.
Described rapid thermal cycles temperature control system connects with the injecting systems of injector, and the injecting systems of injector and temperature control system carry out real-time data interaction.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, described Graphene coating remains the physical characteristic of the height heat conduction of Graphene monomer and high connductivity, and Graphene coating fine and close continuously be can be used as film resistor heater and driven the conformal rapid thermal cycles injection molding process realizing following complicated die mold cavity surface shape by external power source.The electrical conductivity of Graphene coating is 1.98 × 104S/m, and is distributed in mold cavity surface, therefore, it is possible to realization " conformal " is rapidly heated and the uniformity of mold cavity surface temperature.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, described Graphene coating has the surface of ultra-smooth, surface roughness Ra value is about 4.5nm and its skin-friction coefficient is 0.029 (polished silicon material is 0.076), which enhance the mobility of melt in die cavity inside, improve the fillibility of melt, significantly improve the stripping difficulty during feature demoulding of high-aspect-ratio injection-molded item fine structure.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, and the high-intensity performance of described Graphene coating, ensure that rigidity and the repeatability injection of mold cavity.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, described mold cavity surface distributed has silica-based Graphene coating to be at the silica-based Graphene coating of plated surface one deck of mold cavity, the coating of Graphene without the need to being all distributed in die cavity various piece, at most of area of die cavity and ensure energising after form electric power loop.
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, and the surface that described Graphene coating covers die cavity can realize, to conformal heating, greatly improving heat utilization rate.
Accompanying drawing explanation
Fig. 1 is silica-based Graphene coating structure schematic diagram in the die cavity of the utility model based on Graphene coating rapid thermal cycles Coinjection molding apparatus.
Fig. 2 is the structural representation that the utility model is applied in a mold based on Graphene coating rapid thermal cycles Coinjection molding apparatus.
Fig. 3 is that the utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus injection molding technique circular chart.
Fig. 4 is that the utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus injector control system and temperature control system draw bail schematic diagram.
In figure: 1, Graphene coating, 2, silica coating, 3, Mold Metal die cavity, 4, die matrix, 5, sprue bush, 6, goods, 7, troposphere, 8, thermocouple, 9, copper electrode, 10, cooling water pipeline, 11, dc source, 12, temperature acquisition, 13, cooling water control valve, 14, rapid thermal cycles temperature control system, 15, injector control system.
Detailed description of the invention
The utility model is based on Graphene coating rapid thermal cycles Coinjection molding apparatus, comprise polymer plasticization injection device, mold closing mechanism, mould and frame, polymer plasticization injection device and mold closing mechanism are fixed in frame, mould is arranged between the template of mold closing mechanism, polymer plasticization injection device is to injection of polymer melt in mould, mold closing mechanism controls the folding of mould, mould includes location, guiding, die cavity and Graphene coating rapid thermal cycles device, Graphene coating rapid thermal cycles device comprises silica-based Graphene coating, dc source, cooling water pipeline, thermocouple and temperature control system device, mold cavity is distributed with silica-based Graphene coating on the surface, dc source is connected to form electric power loop by the two ends of copper electrode and Graphene coating, thermocouple distribution is near the position of mold cavity surface, thermocouple is connected with temperature control system, temperature control system is connected with dc source and cooling water control valve 13.
As shown in Figure 1, silica coating 2 is distributed with as transition zone in Mold Metal die cavity 3, Graphene coating 1 is plated on silica coating 2, wherein silica coating 2 is insulation, on it, Graphene coating 1 thickness is about about 45nm, the electric conductivity of die cavity, heat superconducting performance, ultra-smooth is guaranteed with extremely repeatability.
The utility model is applied as shown in Figure 2 on mould, and troposphere 7 comprises Graphene coating 1 and silica coating 2, and troposphere 7 is distributed in the surface of Mold Metal die cavity 3; Coolant flow channel 10 is distributed in die matrix 4, and its position is near troposphere 7; Copper electrode 9 (plating insulated hull) is connected with the Graphene coating 1 in troposphere 7, and copper electrode 9 is connected with the two ends, left and right of Graphene coating 1, and the part of copper electrode 9 plated surface insulating barrier is put in die matrix 4 slot electrode; Thermocouple 8 thermometric end is arranged in the position of die matrix 4 near mold cavity surface.During work, DC power output end is connected with two copper electrodes 9, direct current makes it be rapidly heated by the Graphene coating 1 in troposphere 7, the thermocouple 8 being arranged in die matrix 4 shows the temperature of mold cavity surface, and cooling water pipeline 10 leads to cooling water and cools to troposphere 7.
The utility model controls as shown in Figure 3 based on the rapid thermal cycles of Graphene coating rapid thermal cycles Coinjection molding apparatus, show outside mould and injecting systems in Fig. 3, in block diagram, also have dc source 11, temperature acquisition 12, cooling water control valve 13, rapid thermal cycles temperature control system 14 and injector control system 15.Rapid thermal cycles temperature control system 14 is mainly divided into the control section that is rapidly heated, preservation and controlling part and control section three parts that cool, the control section that is wherein rapidly heated controls dc source 11 output voltage, when the temperature that the thermocouple of temperature acquisition 12 shows is for injection optimum temperature, enter preservation and controlling part, the voltage of dc source 11 required for injection temperature adjustment insulation, the heat that mold cavity surface is lost keeps balancing with the heat supplemented.Entering cooling down part after having injected, now control dc source zero output and open cooling water pipeline, when the temperature of thermocouple display is for ejecting temperature, closing cooling water pipeline.
The utility model based on Graphene coating rapid thermal cycles Coinjection molding apparatus operation principle as shown in Figure 2,3, 4, according to mold temperature change course, complete rapid thermal cycles injection molding cycle can be divided into the mold cavity surface heating period, high temperature keeps stage, mold cavity surface cooling stage.In conjunction with injector in above-mentioned three working stages, operation principle of the present utility model is described in detail.
In the mold cavity surface heating period, heating-up section in temperature control system is defeated by controlling dc source, voltage is applied on copper electrode 9, the Graphene coating 1 of mold cavity surface is rapidly heated, thermal conductivity factor due to Graphene is about the 3-4 of the thermal conductivity factor of mould steel doubly, the thermal conductivity factor of silica and silicon is all than the height of mould steel, therefore the temperature of the Graphene coating 1 of mold cavity surface can improve fast, the temperature of mould steel can heat up slow relatively, when mold cavity surface reaches injection optimum temperature, the temperature-rise ratio of die matrix is less, thus reduce heat exhaustion and improve the die cavity efficiency of heating surface.Because in the process that therefore the Graphene coating of mold cavity surface heat with goods geometry, the temperature on mold cavity surface can obtain efficiently, equably distributing.When the temperature of the mold cavity surface that thermocouple 8 shows reaches injection optimum temperature, enter mold cavity surface high temperature and keep the stage, plastic melt in injecting machine material tube will enter mold cavity through nozzle, sprue bush 5 successively, until melt is full of die cavity completely, now the temperature of high temperature maintenance and the temperature of thermocouple 8 display carry out Voltage Cortrol to dc source as required.
When injector enters packing stage, rapid thermal cycles temperature control system 14 enters the stage of cooling, now controlling dc source 11 is zero output voltage, controlled cooling model water control valve 13 opens cooling water pipeline, low-temperature cooling water flows into die matrix, the heat of die matrix is pulled away constantly spreading in low-temperature cooling water, thus reduces the temperature of die matrix and mold cavity surface, with the plastic in quick cooling die die cavity.In mold cools down process, thermocouple 8 is in real time to the temperature of attemperating unit feedback mold cavity surface, and when temperature is reduced to the lowest temperature preset, attemperating unit closed control valve stops passing into cooling water to cooling water pipeline 10, to stop cooling die.In this stage, the temperature of goods oneself be cooled to meet eject requirement, can mould be opened, take out goods.After injector completes matched moulds, temperature control system enters next circulation.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (4)
1. based on Graphene coating rapid thermal cycles Coinjection molding apparatus, comprise polymer plasticization injection device, mold closing mechanism, mould and frame, polymer plasticization injection device and mold closing mechanism are fixed in frame, mould is arranged between the template of mold closing mechanism, polymer plasticization injection device is to injection of polymer melt in mould, mold closing mechanism controls the folding of mould, it is characterized in that: mould includes location, guiding, die cavity and Graphene coating rapid thermal cycles device, Graphene coating rapid thermal cycles device comprises silica-based Graphene coating, dc source, cooling water pipeline, thermocouple and temperature control system device, metal die mold cavity surface is distributed with silica-based Graphene coating, dc source is connected to form electric power loop by the two ends of copper electrode and Graphene coating, thermocouple distribution is near the position of metal die mold cavity surface, thermocouple is connected with temperature control system, temperature control system is connected with dc source and cooling water control valve.
2. according to claim 1 based on Graphene coating rapid thermal cycles Coinjection molding apparatus, it is characterized in that: for silica is as transition zone between described silica-based Graphene coating and metal die mold cavity surface.
3. according to claim 1 based on Graphene coating rapid thermal cycles Coinjection molding apparatus, it is characterized in that: adopt elemental silicon to make mold cavity module, plate Graphene coating on the surface in silicon type chamber.
4. according to claim 1 based on Graphene coating rapid thermal cycles Coinjection molding apparatus, it is characterized in that: Graphene thickness of coating is 45nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520217423.9U CN204604751U (en) | 2015-04-10 | 2015-04-10 | Based on Graphene coating rapid thermal cycles Coinjection molding apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520217423.9U CN204604751U (en) | 2015-04-10 | 2015-04-10 | Based on Graphene coating rapid thermal cycles Coinjection molding apparatus |
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| CN204604751U true CN204604751U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520217423.9U Withdrawn - After Issue CN204604751U (en) | 2015-04-10 | 2015-04-10 | Based on Graphene coating rapid thermal cycles Coinjection molding apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723510A (en) * | 2015-04-10 | 2015-06-24 | 北京化工大学 | Rapid heating-cycle molding set based on graphene coating |
| CN106738641A (en) * | 2016-12-04 | 2017-05-31 | 北京化工大学 | A kind of new microfluidic chip mould and method |
-
2015
- 2015-04-10 CN CN201520217423.9U patent/CN204604751U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723510A (en) * | 2015-04-10 | 2015-06-24 | 北京化工大学 | Rapid heating-cycle molding set based on graphene coating |
| CN104723510B (en) * | 2015-04-10 | 2016-10-05 | 北京化工大学 | Based on Graphene coating rapid thermal cycles Coinjection molding apparatus |
| CN106738641A (en) * | 2016-12-04 | 2017-05-31 | 北京化工大学 | A kind of new microfluidic chip mould and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150902 Effective date of abandoning: 20161005 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |