CN104690930A - Steam heating type rapid heat cycle molding injection mold - Google Patents
Steam heating type rapid heat cycle molding injection mold Download PDFInfo
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- CN104690930A CN104690930A CN201310663511.7A CN201310663511A CN104690930A CN 104690930 A CN104690930 A CN 104690930A CN 201310663511 A CN201310663511 A CN 201310663511A CN 104690930 A CN104690930 A CN 104690930A
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Abstract
The invention relates to a steam heating type rapid heat cycle molding injection mold. The mold comprises a core plate and a cavity plate, wherein the core plate and the cavity plate are respectively connected with support plates; the support plates adopts ordinary steel plates with poor heat-conducting properties; the ordinary steel plates are connected to form a latticed structure in a criss-cross manner; the cavity plate is formed by a molding layer and a base layer; the base layer is prepared with ordinary hot work mold steel by adopting a conventional process; the molding layer is prepared by superposing high-quality mold steel with good heat fatigue resistance and wear resistance and terrific polishing property on the surface of the base layer by adopting an overlay welding method; heating and cooling pipelines are arranged on the core plate and the base layer of the cavity plate and are connected with temperature control devices to achieve rapid heating and cooling of the molding surface of the mold. The steam heating type rapid heat cycle molding injection mold has the beneficial effects that innovative designs of the material, the structure, and the like are put forward, so that the mold has the obvious advantages of low production cost, high heating and cooling efficiency, good product surface quality, light mold weight, and the like.
Description
Technical field
The invention belongs to the injection molding technology field of materials processing subject, particularly relate to a kind of steam heating type high-gloss injection mold.
Background technology
High light injection molding technology, as an extremely potential green forming technique, has attracted a large amount of scholars to carry out research and extension to it, but the development of high light injection molding technology is still immature, also there is the problem that many witches are to be solved.Particularly at high-gloss injection mold design and manufaction technical elements, Problems existing is particularly outstanding.
Because the forming surface polishing required precision of high-gloss injection mold is high, so, first require that its mold materials must possess excellent polishing performance; Secondly, because in normal productive process, Fast Heating and quick cooling hocket repeatedly, high-gloss injection mold forming part easily produces Under Thermal Fatigue Damage, thus causes mould invalidation, therefore, require that cavity plate material also must possess the ability of good heat resistance, thermal deformation resistant and heat fatigue.In addition, during the heating of Steam Heating high-gloss injection mold, heat medium---be often mixed with impurity in water vapour, have certain corrosiveness to mold materials, therefore, the corrosion resistance of mold materials will be got well, and can prevent from getting rusty.According to the above requirement to high-gloss injection mold cavity plate material, people often select import high-quality mould steel, as the CENAI of FDAC, the NAK80 of Japanese Datong District and Sweden's hot die steel (VIDAR SUPERIOR), these mold materials have good dimensional stability and polishing performance and higher heat shock resistance and thermal fatigue property, it is the first-selection of high-gloss injection mold material, but these high-quality price of steel product are expensive, cause the high expensive of mould.
Existing steam heating type high-gloss injection mold also also exists the low outstanding problem of the efficiency of cycle, in order to shorten molding cycle and improve injection moulding production efficiency, the structural design of steam heating type high-gloss injection mold must take into full account the requirement of mould Fast Heating and cooling fast, this just requires must adopt special method for designing or structure in Design of Dies, to reduce the thermal capacity of mould as far as possible, thus improve the efficiency of cycle.
So, the present invention is directed to the innovative design that steam heating type high-gloss injection mold carries out materials and structures two aspect, while guarantee product quality, reduce the production cost of mould, reduce the thermal capacity of mould and the loss of heat, to improve heating cooling effectiveness, shorten molding cycle.
Summary of the invention
The object of the invention is the deficiency overcoming above-mentioned technology, there is provided a kind of steam heating type high-gloss injection mold, this cavity board is made up of base layer and shape layer, and selects two kinds of different steel to make, greatly can save the consumption of high-quality mould steel, thus reduce die cost.The gripper shoe of core and die cavity have employed latticed design simultaneously, can reduce the thermal capacity of mould and the loss of heat greatly, improves heating cooling effectiveness, shortens molding cycle, meanwhile, greatly can also alleviate the weight of mould.
For above reaching the object that describes, present invention employs following concrete technical scheme.
A kind of steam heating type high-gloss injection mold, this mould comprises core plate and cavity plate, and described core plate and cavity plate are connected to gripper shoe, and described gripper shoe adopts the general steel plate of heat conductivility difference, connects into latticed structure by crisscross.Described cavity plate is made up of shape layer and base layer, the very thin thickness of described shape layer.Described base layer adopts common process manufacture by common hot die steel, and described shape layer is selected to be possessed good thermal fatigue resistance and the splendid high-quality mould steel of polishing performance and adopt welding method to superpose on the surface at base layer to make.Described core plate and cavity plate base layer offer heating-cooling coil road, is connected with attemperating unit, in pipeline, pass into high-temperature steam and low-temperature cooling water realize cooling the Fast Heating of molding surface.Described core plate and the inner position near forming surface of cavity plate are also provided with temperature measuring equipment.Temperature measuring equipment, heater, cooling device are connected with attemperating unit.
Described steam heating type high-gloss injection mold comprises core plate and cavity plate.
Described core plate and cavity plate are connected to gripper shoe.
Described gripper shoe is fenestral fabric.
The design criteria of described fenestral fabric is the structural strength that will ensure mould.
Described fenestral fabric is welded by crisscross by plurality of steel plates.
Described steel plate all adopts the general steel plate of heat conductivility difference.
Described cavity plate is made up of shape layer and base layer.
Described base layer selects common hot die steel to make.
Described shape layer is selected possesses good thermal fatigue resistance and the splendid high-quality mould steel of polishing performance is made.
The preparation method of described cavity plate, is characterized in that:
The first step: with the base layer of conventional method processing and fabricating cavity plate;
Second step: adopt welding method to superpose shaping layer material on the surface at base layer, make cavity plate blank;
3rd step: sanding and polishing is carried out, to meeting roughness requirements to the type rooved face of die cavity blank.
Described core plate and cavity plate base layer offer heating-cooling coil road, is connected with attemperating unit, in pipeline, pass into high-temperature steam and low-temperature cooling water realize cooling the Fast Heating of molding surface.
The position of described cavity plate and the inner close forming surface of core plate is separately installed with temperature measuring equipment.
Described temperature measuring equipment is thermocouple.
Owing to have employed technique scheme, the steam heating type high-gloss injection mold of the present invention has the beneficial effect of following several aspect.
1. production cost is low;
Because of cavity board shape layer very thin thickness, the ratio accounting for cavity board cumulative volume is general not high, and the volume of cavity board is larger, and the volume fraction shared by shape layer can be less.So, adopt expensive high-quality mould steel to manufacture shape layer, cheap common die steel making base layer, can be implemented in and meet die surface there is good thermal fatigue resistance and polishing performance, while ensureing moulding surface quality, greatly save the consumption of expensive high-quality mould steel.Meanwhile, owing to having set up the gripper shoe that can improve the intensity of mould in cavity plate and core plate, so, while meeting mould structure requirement of strength, the thickness of cavity plate and core plate can be reduced, thus saved the consumption of mould steel.So the present invention can reduce the production cost of mould greatly, there is good economic benefit.
2. the efficiency of cycle is high;
Because the gripper shoe be connected with cavity plate and core plate have employed latticed non-solid structure, while guarantee mould structure intensity, the thermal capacity of mould can be reduced greatly.Meanwhile, because the air in mesh is the non-conductor of heat, and gripper shoe have employed the steel of heat conductivility difference, so in the heating period of mould, the heat that effectively can reduce high-temperature steam generation scatters and disappears to gripper shoe direction, thus be conducive to improving mold heated efficiency, reduce energy ezpenditure; In the mold cools down stage, effectively can reduce the heat of gripper shoe to cavity plate transmission, thus improve the cooling effectiveness of mould, be conducive to the consumption reducing energy equally.
3. mold weight is light;
Fenestral fabric is made after the gripper shoe optimization that cause is connected with cavity plate and core plate, it is while the structural strength ensureing mould, no matter mold weight, be that the aspect such as transport or operation is all more convenient than the gripper shoe of entity structure and quick if being alleviated greatly.
In a word, the present invention is directed to the aspects such as the materials and structures of steam heating type high-gloss injection mold and carried out innovative design, make this mould have the significant advantages such as production cost is low, heating cooling effectiveness is high, product surface quality good, mold weight is light.
Accompanying drawing explanation
Fig. 1 is steam heating type high-gloss injection mold structural representation of the present invention.
Fig. 2 is the supporting plate structure schematic diagram of steam heating type high-gloss injection mold of the present invention.
In figure: 1, sprue bush, 2, sprue, 3, runner, 4, cast gate, 5, plastic, 6, core fixing plate, 7, core plate, 8, thermocouple in core plate, 8 ', thermocouple in cavity plate, 9, cavity plate, 10, impression bolster, 11, support, 12, backing plate, 13, thimble fixed head, 14, push rod, 15, moving clamping plate, 16, cavities bear plate, 16 ', core gripper shoe, 17, fixed clamping plate, 901, cavity plate moulding section, 902, cavity plate body portion, 1601 steel plates, 7001, heating-cooling coil road in core plate, 9001, heating-cooling coil road in cavity plate.
Detailed description of the invention
For understanding technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, a kind of steam heating type high-gloss injection mold disclosed by the invention, it comprises core plate 7 and cavity plate 9, described cavity plate and core plate are connected to gripper shoe 16 and 16 ', the general steel plate 1601 of described gripper shoe 16 and 16 ' employing polylith heat conductivility difference, connect into latticed structure by crisscross, described fenestral fabric is made up of regular polygon mesh, and the shape of mesh, size and distribution need optimal design to ensure the performance requirement of mould each side.Described cavity plate 9 is made up of shape layer 901 and base layer 902, the very thin thickness of described shape layer 901, about 0.4 ~ 4mm.Described base layer 902 adopts common process manufacture by common hot die steel, described shape layer 901 is selected possesses good thermal fatigue resistance and the splendid high-quality mould steel of polishing performance, as the CENA1 of FDAC, adopt welding method to superpose on the surface at base layer 902 to make, and through sanding and polishing to required roughness.Described core plate 7 and cavity plate base layer 902 offer heating-cooling coil road 7001 and 9001 respectively, is connected with attemperating unit, in pipeline, pass into high-temperature steam and low-temperature cooling water realize cooling the Fast Heating of mould molding piece surface.The inner position near forming surface of described core plate and cavity plate is also provided with thermocouple 8 and 8 ' as temperature measuring equipment, and is connected with attemperating unit.Temperature measuring equipment, heater, cooling device are connected with attemperating unit.
Operation principle of the present invention is as follows.
According to the course of mold temperature change, a complete high light injection molding cycle can be divided into the mold heated stage, and high temperature keeps stage, mold cools down stage and low temperature to keep the stage.Be described in detail below in conjunction with the operation principle of above-mentioned several working stage to a kind of steam heating type high-gloss injection mold of the present invention.
In the mold heated stage, attemperating unit opens high-temperature steam pipeline by controlling reversal valve, high temperature and high pressure steam flows in the heating-cooling coil road 7001 and 9001 in core plate 7 and cavity plate 9, the heat that high temperature and high pressure steam comprises constantly spreads in the mode of convection condensation heat exchange in core plate 7 and cavity plate 9, thus raise the temperature of whose surfaces and mold cavity surface, and the gripper shoe 16 be connected with cavity plate 9 with core plate 7 and 16 ' is owing to have employed latticed non-solid structure, the thermal capacity of mould can be reduced greatly, simultaneously, because the air in mesh is the non-conductor of heat and supporting steel plate 1601 itself has selected the steel of heat conductivility difference, so the heat that effectively can reduce high-temperature steam generation scatters and disappears to gripper shoe direction, thus reduce thermal loss and improve the efficiency of heating surface.In mold heated process, be arranged on thermocouple in core plate 7 and cavity plate 98 and 8 ' respectively to the temperature of attemperating unit Real-time Feedback mold cavity surface and whose surfaces, when temperature is increased to the temperature upper limit of setting, attemperating unit cuts off high-temperature steam pipeline by switching reversal valve, thus stops heating mould.
Keep the stage at high temperature, mould is in matched moulds state, and the plastic melt in injecting machine material tube will enter mold cavity, until melt is full of die cavity completely through nozzle, sprue 2, runner 3, cast gate 4 successively.Because mould-filling time is very short, thus in the process mold cavity temperature substantially can maintain heating terminate after state.In the process, if mold cavity temperature declines too many, attemperating unit can open temperature steam pipeline again, passes into high temperature and high pressure steam to the heating-cooling coil road 7001 and 9001 in mould, to maintain the condition of high temperature on mold cavity surface and whose surfaces.
In the mold cools down stage, attemperating unit opens cooling water pipeline by controlling reversal valve, low-temperature cooling water flows in the heating-cooling coil road 7001 and 9001 in core plate 7 and cavity plate 9, the heat that core plate 7 and cavity plate 9 comprise is pulled away constantly spreading in low-temperature cooling water, thus reduce the temperature of whose surfaces and mold cavity surface, with plastic cement 5 in quick cooling die die cavity.In mold cools down process, due to the non-conductor that the air in gripper shoe 16 and 16 ' mesh is heat, and supporting steel plate 1601 has selected the steel of heat conductivility difference, so, the heat diffusion that can reduce gripper shoe enters in the low-temperature cooling water in heating-cooling coil road, thus reduces thermal loss and improve die surface cooling effectiveness.In cooling procedure, be arranged on thermocouple in core plate 7 and cavity plate 98 and 8 ' respectively in real time to the temperature of attemperating unit feedback-type wicking surface and mold cavity surface, when temperature is reduced to the lowest temperature preset, attemperating unit switches reversal valve and stops in heating and cooling system, passing into low-temperature cooling water, to stop cooling die.
The stage is kept at low temperature, attemperating unit opens high-pressure gas pipeline by controlling reversal valve, gases at high pressure enter in heating-cooling coil road, cooling water residual in pipeline is drained, thus avoid the excessive descent of mold temperature, effectively avoid cooling water residual in heating-cooling coil road to the interference of mold heated in next molding cycle simultaneously, be conducive to improving mold heated efficiency.In this stage, the temperature of plastic cement 5 has been cooled to meet and has ejected requirement, opens mould, takes out plastic 5, thus complete an injection molding cycle.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a steam heating type high-gloss injection mold, this mould comprises core plate and cavity plate, described core plate and cavity plate are connected to gripper shoe, described gripper shoe adopts general steel plate to connect into latticed structure by crisscross, the shape layer that described cavity plate is made up of two kinds of different materials and base layer form, described core plate and cavity plate base layer offer heating-cooling coil road, forms heating-cooling device.
2. steam heating type high-gloss injection mold according to claim 1, it is characterized in that: mould comprises core plate and cavity plate, described core plate and cavity plate are connected to gripper shoe.
3. steam heating type high-gloss injection mold according to claim 1, is characterized in that: described gripper shoe is fenestral fabric.
4. steam heating type high-gloss injection mold according to claim 3, is characterized in that: described fenestral fabric is that the general steel plate differed from by polylith heat conductivility is formed by connecting by crisscross.
5. steam heating type high-gloss injection mold according to claim 1, is characterized in that: cavity plate is made up of shape layer and base layer.
6. steam heating type high-gloss injection mold according to claim 5, is characterized in that: described base layer selects common hot die steel to make.
7. steam heating type high-gloss injection mold according to claim 5, is characterized in that: described shape layer is selected possesses good thermal fatigue resistance and the splendid high-quality mould steel of polishing performance is made.
8. steam heating type high-gloss injection mold according to claim 5, the preparation method of described cavity plate, is characterized in that:
The first step: with the base layer of conventional method processing and fabricating cavity plate;
Second step: adopt welding method to superpose shaping layer material on the surface at base layer, make cavity plate blank;
3rd step: sanding and polishing is carried out, to meeting roughness requirements to the type rooved face of die cavity blank.
9. steam heating type high-gloss injection mold according to claim 1, it is characterized in that: described core plate and cavity plate base layer offer heating-cooling coil road, be connected with attemperating unit, in pipeline, pass into high-temperature steam and low-temperature cooling water realize cooling the Fast Heating of molding surface.
10. steam heating type high-gloss injection mold according to claim 1, is characterized in that: described cavity plate and the inner position near forming surface of core plate are separately installed with temperature measuring equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310663511.7A CN104690930A (en) | 2013-12-10 | 2013-12-10 | Steam heating type rapid heat cycle molding injection mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310663511.7A CN104690930A (en) | 2013-12-10 | 2013-12-10 | Steam heating type rapid heat cycle molding injection mold |
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| CN104690930A true CN104690930A (en) | 2015-06-10 |
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| CN201310663511.7A Pending CN104690930A (en) | 2013-12-10 | 2013-12-10 | Steam heating type rapid heat cycle molding injection mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105034301A (en) * | 2015-08-28 | 2015-11-11 | 宁波均胜汽车电子股份有限公司 | Injection-mold rapid-cooling and rapid-heating product welding line removing method |
| CN110126226A (en) * | 2019-06-13 | 2019-08-16 | 西南科技大学 | A kind of micro-nano injection forming mold type chamber heating system and its heating means |
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| CN202556679U (en) * | 2012-05-14 | 2012-11-28 | 宁波和鑫光电科技有限公司 | Highlight injection mold of clutch type cooling structure |
| CN203665888U (en) * | 2013-12-10 | 2014-06-25 | 深圳信息职业技术学院 | Steam-heating type specular injection mold |
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2013
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005161798A (en) * | 2003-12-05 | 2005-06-23 | Daito Kogyo Kk | Resin forming mold |
| JP2010201866A (en) * | 2009-03-05 | 2010-09-16 | Sumitomo Heavy Ind Ltd | Metal mold device, heat insulating member and method of manufacturing metal mold device |
| CN201989305U (en) * | 2010-12-31 | 2011-09-28 | 深圳市华益盛模具有限公司 | High gloss mold |
| CN102179909A (en) * | 2011-03-04 | 2011-09-14 | 慈溪市盛艺模具有限公司 | High-brightness non-melted mark steam injection mold and using method thereof |
| CN202556679U (en) * | 2012-05-14 | 2012-11-28 | 宁波和鑫光电科技有限公司 | Highlight injection mold of clutch type cooling structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105034301A (en) * | 2015-08-28 | 2015-11-11 | 宁波均胜汽车电子股份有限公司 | Injection-mold rapid-cooling and rapid-heating product welding line removing method |
| CN110126226A (en) * | 2019-06-13 | 2019-08-16 | 西南科技大学 | A kind of micro-nano injection forming mold type chamber heating system and its heating means |
| CN110126226B (en) * | 2019-06-13 | 2021-04-06 | 西南科技大学 | Micro-nano injection molding die cavity heating system and heating method thereof |
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