CN103587005A - Maze conformal cooling method and structure of mold - Google Patents
Maze conformal cooling method and structure of mold Download PDFInfo
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- CN103587005A CN103587005A CN201310559377.6A CN201310559377A CN103587005A CN 103587005 A CN103587005 A CN 103587005A CN 201310559377 A CN201310559377 A CN 201310559377A CN 103587005 A CN103587005 A CN 103587005A
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Abstract
The invention provides a maze conformal cooling method and structure of a mold, and aims to solve the problem that the conventional mold cooling method cannot meet efficient and uniform cooling requirement of a complex mold. Compared with three traditional mold cooling method including a straight hole flow channel, a built-in bent pipe flow channel and a common tubular shape follow-up flow channel, the maze conformal cooling method is high in cooling efficiency and good in cooling effect. According to the structure, a hollow layer nearly parallel to the inner surface of a cavity is arranged in the position, having certain thickness distance from the cavity, in the mold, a maze type partition wall is arranged in the hollow layer, and a cooling medium flows in a channel formed by partition wall gapes in a cooling layer. The maze conformal cooling method and the structure of the mold have the advantages that the cooling state of the cooling medium in the gaps of the maze type partition wall is turbulence, and the contact area between the cooling medium and the mold is increased, so that the cooing efficiency is high, the service life of the mold is long, an injection molding process period is shortened, and the injection molding manufacturing cost is reduced. A 3-dimensional laser printing technology is adopted to directly manufacture the mold with the layered maze flow channel conformal cooling structure, components in the mold are uniform, the molding process is simple, the mold manufacturing period is short, and the mold manufacturing cost is low.
Description
Technical field
The invention belongs to technology of die manufacturing, be specifically related to a kind of mould labyrinth conformal cooling method and structure thereof.
Background technology
Tool and Die Technology is one of most widely used technology in current manufacturing industry, and the cooling system of mould all has material impact to the production efficiency of the life-span of mould, product and quality.Special in complicated large mold, cooling system is even more important.At present, the cooling means of mould mainly contains three kinds: straight hole runner cooling means, built-in bend pipe runner cooling means and tubulose conformal runner cooling means.
Straight hole runner cooling means is most widely used general in current Tool and Die Technology, by traditional machine-tooled method, as metal blank is carried out to car, milling, plane, brill, mill, galvanic corrosion etc., thereby obtains the mould with straight hole coolant flow channel.Straight hole coolant flow channel is generally comprised of one group of straight perforate system.For forming the runner of sealing, except the import and outlet of cooling medium, other perforate need to seal with plug.There is following problem in this cooling means: first, straight hole runner cannot evenly be pressed close to die cavity and whose surfaces, causes cooling effect inhomogeneous, simultaneously in complicated die, has the thermal center that straight hole runner cannot be approaching, is unfavorable for scattering and disappearing of heat, and cooling effectiveness is low.Therefore, there is the inhomogeneous and low problem of cooling effectiveness of cooling effect in straight hole runner cooling means, can reduce the quality of product, increases forming period simultaneously, improved the cost that part is manufactured.Secondly, the processed complex of straight hole coolant flow channel, a lot of holes need to block with plug.Finally, the design of straight hole coolant flow channel mainly relies on experience, and when the mould becoming increasingly complex in the face of structure, the design of this cooling means lacks theoretical direction, is difficult to meet cooling requirement.
The built-in bend pipe runner type of cooling has solved the problem of cooling pipe shape restriction to a certain extent, its technical scheme is specially: mould consists of the fine and close filling block of mould outline housing and casting, in fine and close filling block, be provided with mould conformal cooling pipe processing, that the axis corresponding with the shape conformal of mold cavity is space three-dimensional curve in advance, fine and close filling block casts in mould outline housing.Built-in bend pipe runner takes the material bendings such as copper, nickel to be shaped, with respect to straight hole runner cooling means, its flow channel shape complexity increases, can improve cooling effectiveness and quality, fine and close filling block adopts casting process processing cost low, and the manufacturing cost of mould and manufacturing cycle are all lower than traditional machined mfg. moulding die.But its conformal cooling pipe is independent bending forming, be difficult to reach with complex cavity and meet completely, and casting cycle can affects the dimensional accuracy of preform pipeline, the more traditional forging mold poor performance of mechanical property of casting filling block.
The realization of tubulose conformal cooling method is to rely on the development that increases material manufacturing technology (3D printing technique).It is a kind of according to three-dimensional data model increasing material manufacturing technology, based on successively manufacturing, dispersed material is connected into the technique of entity.This technique becomes 3D solid into some two dimensional surfaces, greatly reduces the complexity of manufacture, can Quick-forming goes out to have the mould of complicated follow-cooling passageway.Tubulose follow-cooling passageway can completely freely design and manufacture, and at die surface, forms hot envelope district, has improved cooling efficiency and the uniformity of temperature.But at flow channel cross-section long-pending regularly, girth is less for tubulose conformal cooling method, long-pending little with mould contact surface, has limited its cooling effectiveness.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of mould labyrinth conformal cooling method and structure thereof, the present invention has the advantages that cooling effectiveness is high, mold temperature is evenly distributed, and is particularly suitable for the cooling of complex-shaped mould.
A kind of mould provided by the invention labyrinth conformal cooling method, it is characterized in that, the method is or/and the position of whose surfaces arranges voided layer at the inner close die cavity of mold, and make voided layer closely parallel with described surface, in voided layer, be provided with for filling the labyrinth path of cooling medium, to increase the contact area of cooling medium and mould, and make the flow regime of cooling medium in the partition wall gap of labyrinth path for turbulent flow, to strengthen the convection current of cooling medium inside.
Die cooling structure provided by the invention, is characterized in that, the inner close die cavity of mold is or/and the position of whose surfaces is provided with voided layer, and this voided layer is closely parallel with described surface, is provided with for filling the labyrinth path of cooling medium in it.
Compared with prior art, the present invention has following technique effect: in the mould with labyrinth conformal cooling layer, runner is laminar flow road, but not traditional runner, greatly increase the contact area of cooling medium and mould, cooling medium flow regime in labyrinth type partition wall gap is turbulent flow simultaneously, has increased the convection current of cooling medium inside, has increased substantially cooling effectiveness.In the flow path of one cooling medium, have a plurality of extra access ports and outlet, multiply flow of cooling water path is in parallel, and mold integral cooling effect evenly, rapidly, reduce mould inside residual stress, extend die life, shorten the Shooting Technique cycle, reduce injection moulding production cost.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of mould example provided by the invention;
Fig. 2 is the schematic cross-section of mould example provided by the invention;
Fig. 3 is a kind of expansion schematic diagram of labyrinth conformal cooling layer;
Fig. 4 is that the second of labyrinth conformal cooling layer launches schematic diagram;
Fig. 5 is the third expansion schematic diagram of labyrinth conformal cooling layer.
The specific embodiment
Method provided by the invention arranges cooling layer by the position at die surface certain distance, labyrinth flow-path is distributing in this cooling layer, the cooling contact area that has increased cooling medium and mould of stratiform, in labyrinth flow-path, cooling medium can produce strong turbulent condition simultaneously, and cooling effectiveness further increases compared with tubulose conformal cooling method.
Mould with labyrinth conformal cooling layer provided by the invention is in mold inside, to have one and the subparallel voided layer of die cavity inner surface.The position of labyrinth cooling layer changes and arranges according to the heat dissipation capacity at product position: at product wall thickness heat energy-saving position greatly, cooling layer is near die cavity, at the little position of heat dissipation capacity, cooling layer is suitably away from die cavity, at the position being changed to thin-walled by heavy wall, realize continuous transition, make the heat radiation of this position mold cavity surface even.
Distance between this voided layer and die cavity is D; The bed thickness d of voided layer selects according to the size of product and thickness, and d generally gets 4-8mm, product larger and when thick d get higher value, the little and thin d of being of product size gets smaller value, the distance B of voided layer and mold cavity surface is 4d～6d, is generally taken as 5d.In voided layer, be provided with labyrinth path, cooling medium flows in runner.
Mould provided by the invention, cooling layer and die cavity/whose surfaces closely be arranged in parallel, the series connection runner that the labyrinth path arranging in cooling layer can single gateway, the runner in parallel of multiple port, or any combination of series connection runner and runner in parallel.
The cross section of single runner can be circular, also can be that other arbitrary shape is (as with shapes such as profile of tooth, trapezoidal, rectangles, or using these shapes as basic configuration, in addition fillet or change various parameter values and the derivative shape that generates), all can adopt the manufacture of 3D printing technique.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.At this, it should be noted that, for the explanation of these embodiments, be used for helping to understand the present invention, but do not form limitation of the invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can not combine mutually as long as do not form each other conflict.
As shown in Figure 1, 2, the example of mould provided by the invention comprises mold 2 and labyrinth cooling layer 3, labyrinth cooling layer 3 is nearly parastate with the die cavity 1 of mould, press parastate design cooling layer shape, and according to the concrete structure of mould, the distance B between labyrinth cooling layer and mold cavity surface is finely tuned.
Fig. 2 is the schematic cross-section of example 1, and the setting of labyrinth cooling layer 3 should consider that the heat dissipation capacity at product position changes: at product wall thickness heat energy-saving position greatly, cooling layer 3 should be near die cavity 1, and the distance B between labyrinth cooling layer and mold cavity surface is dwindled 1～4mm; At the little position of the heat dissipation capacities such as thin-walled, cooling layer 3 should be suitably away from die cavity 2, and the distance B between labyrinth cooling layer and mold cavity surface increases 1～4mm.Stratiform conformal cooling method can realize continuous transition at the position being changed to thin-walled by heavy wall, makes the heat radiation of this position mold cavity surface even.
Traditional straight hole runner cooling means, built-in bend pipe runner cooling means and tubulose conformal cooling method be structurally all based on tubulose runner, exists to take the thermograde of the concentric circles that conduit axis is the center of circle on the cross section of tubulose runner.If pipe is arranged sparse, the thermograde on mold cavity surface is inhomogeneous, and cooling effect is not good; If pipe is arranged too intensive, can greatly increase the manufacture difficulty of mould, reduce mould production efficiency, increase die cost.The runner of mould provided by the invention is stratiform follow-cooling passageway, and thermograde is uniformly distributed in the plane that is closely parallel to cooling layer, has strengthened cooling effect.
When product has sunk structure, when mold cavity has outstanding structure, highlight is heated more concentrated around, needs emphasis cooling, avoids cooling rear distortion.While adopting straight hole tubulose cooling means, face equally the problem that arranges of cooling pipe, in the outstanding part of mold cavity, be difficult to arrange straight hole cooling water channel, sometimes can only be arranged to the cooling duct of fountain type, be difficult to guarantee cooling effectiveness; While adopting built-in bend pipe runner cooling means, the outstanding local bend pipe flexibility of mould is larger, and manufacture difficulty is large, and during casting mold body owing to not supporting easily distortion.Can the fit outstanding position of mould of the stratiform follow-cooling passageway of mould provided by the invention, guarantees the cooling effect at the cooling position of emphasis.
Fig. 3 is simple labyrinth cooling layer schematic diagram, only has an entrance and an outlet, and in the cooling layer of labyrinth, cooling medium is only along a flow path.The mobile distance of cooling medium in this schematic diagram, if product is oversize, may cause the flow path of cooling medium long, the coolant temperature of entrance and exit is poor excessive, cooling effect is inhomogeneous, so this simple labyrinth cooling layer is suitable for, product size is little, the mould of simple shape.
On the basis of the labyrinth cooling layer shown in Fig. 3, improve and obtain the second labyrinth cooling layer, as shown in Figure 4, adopt the pattern of a plurality of coolant flow channel parallel connections.In this schematic diagram, have a plurality of coolant flow channels, each cooling water channel length is shorter, and cooling medium can be brought into play rapidly cooling effect, improve cooling effectiveness, paralleling model makes mould, and cooling effect is even everywhere, is suitable for rapidly cooling mould of needs, or the mould that is easily out of shape because inhomogeneous cooling is even of product.
For larger-size complicated die, can adopt the third labyrinth cooling layer as shown in Figure 5, this cooling structure has a plurality of cooling medium entrance and exits, and the inner a plurality of series connection runners of cooling layer and runner in parallel combine.This labyrinth cooling layer is applicable to larger-size mould, or the more complicated mould of internal structure, and cooling effectiveness is high, and part performance is good, and die life is long.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So every, do not depart from the equivalence completing under spirit disclosed in this invention or revise, all falling into the scope of protection of the invention.
Claims (8)
1. a mould labyrinth conformal cooling method, it is characterized in that, the method is or/and the position of whose surfaces arranges voided layer at the inner close die cavity of mold, and make voided layer closely parallel with described surface, in voided layer, be provided with for filling the labyrinth path of cooling medium, to increase the contact area of cooling medium and mould, and make the flow regime of cooling medium in the partition wall gap of labyrinth path for turbulent flow, to strengthen the convection current of cooling medium inside.
2. mould according to claim 1 labyrinth conformal cooling method, is characterized in that, described labyrinth path is manufactured by 3D printing technique, produces labyrinth type partition wall in voided layer, and vacant region forms described labyrinth path automatically.
3. a die cooling structure, is characterized in that, the inner close die cavity of mold is or/and the position of whose surfaces is provided with voided layer, and this voided layer is closely parallel with described surface, is provided with for filling the labyrinth path of cooling medium in it.
4. die cooling structure according to claim 3, is characterized in that, the series connection runner that described labyrinth path is single gateway.
5. die cooling structure according to claim 3, is characterized in that, the runner in parallel that described labyrinth path is multiple port.
6. die cooling structure according to claim 3, is characterized in that, described labyrinth path is any combination of series connection runner and runner in parallel.
7. according to the arbitrary described die cooling structure of claim 3 to 6, it is characterized in that, the cross section that forms the single runner of labyrinth path is arbitrary shape.
8. according to the arbitrary described die cooling structure of claim 3 to 6, it is characterized in that, the position of labyrinth cooling layer changes and arranges according to the heat dissipation capacity at product position: at product wall thickness heat energy-saving position greatly, cooling layer is near die cavity, at the little position of heat dissipation capacity, cooling layer, suitably away from die cavity, is realized continuous transition at the position being changed to thin-walled by heavy wall, makes the heat radiation of this position mold cavity surface even.
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| CN104129050A (en) * | 2014-06-30 | 2014-11-05 | 华南理工大学 | Injection mould with specially-shaped conformal cooling water channel and manufacturing method thereof |
| CN104760169A (en) * | 2015-02-12 | 2015-07-08 | 上海交通大学 | Laser-manufacturing-technology-based conformal cooling device making method |
| CN104875351A (en) * | 2015-06-04 | 2015-09-02 | 东莞宏光光学制品有限公司 | Annular circulation water path of optical mold |
| CN105312544A (en) * | 2014-07-30 | 2016-02-10 | 丰田自动车株式会社 | Mold |
| CN105437426A (en) * | 2015-06-29 | 2016-03-30 | 深圳光韵达光电科技股份有限公司 | Repair and renovation method for mold |
| CN105855510A (en) * | 2016-05-25 | 2016-08-17 | 蚌埠市隆兴压铸机厂 | Instant cooling charging barrel for die casting machine |
| CN106170354A (en) * | 2014-10-28 | 2016-11-30 | 韩国生产技术研究院 | Utilize the hot stamping die cooling block manufacture method of 3-dimensional metal printer |
| CN106862491A (en) * | 2017-03-29 | 2017-06-20 | 福建工程学院 | One kind become shape heating cooling mould and its processing and application method |
| CN107639823A (en) * | 2016-07-21 | 2018-01-30 | 利萨·德雷克塞迈尔有限责任公司 | For producing the monolithic instrument of moulded parts |
| CN107842483A (en) * | 2017-10-30 | 2018-03-27 | 华中科技大学 | A kind of compound compressor cooler based on 3D printing technique |
| TWI622477B (en) * | 2014-05-28 | 2018-05-01 | 劉忠男 | Method for forming a cooling system of rapid heating mould |
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| CN109277525A (en) * | 2018-10-22 | 2019-01-29 | 瑞安市亚泰铜带厂 | The mold and casting method of casting copper artware |
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| CN108421898B (en) * | 2018-04-24 | 2024-05-03 | 大连理工大学 | Conformal cooling pipeline mold with internal threads and manufacturing method thereof |
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| TWI622477B (en) * | 2014-05-28 | 2018-05-01 | 劉忠男 | Method for forming a cooling system of rapid heating mould |
| TWI641470B (en) * | 2014-05-28 | 2018-11-21 | 劉忠男 | Method for forming a cooling system of rapid heating mould |
| TWI641469B (en) * | 2014-05-28 | 2018-11-21 | 劉忠男 | Method for forming a cooling system of rapid heating mould |
| CN104129050A (en) * | 2014-06-30 | 2014-11-05 | 华南理工大学 | Injection mould with specially-shaped conformal cooling water channel and manufacturing method thereof |
| CN105312544A (en) * | 2014-07-30 | 2016-02-10 | 丰田自动车株式会社 | Mold |
| US9987769B2 (en) | 2014-07-30 | 2018-06-05 | Toyota Jidosha Kabushiki Kaisha | Mold |
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| US9849548B2 (en) | 2014-10-28 | 2017-12-26 | Korea Institute Of Industrial Technology | Method of manufacturing cooling block for hot stamping mold using three-dimensional metal printer |
| CN104760169A (en) * | 2015-02-12 | 2015-07-08 | 上海交通大学 | Laser-manufacturing-technology-based conformal cooling device making method |
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| CN114555331A (en) * | 2019-10-15 | 2022-05-27 | 迪恩易有限公司 | Mold plate cooling device |
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| CN111085833B (en) * | 2019-11-26 | 2022-04-29 | 重庆大学 | Method for controlling volume plastic forming distortion of bent hole by using local temperature difference |
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| CN113134571A (en) * | 2021-04-15 | 2021-07-20 | 苏威新材料(徐州)有限公司 | Precoated sand forming die |
| CN113134571B (en) * | 2021-04-15 | 2022-05-17 | 苏威新材料(徐州)有限公司 | Precoated sand forming die |
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