CN103302231A - Solidification method for wet core of water-based adhesive - Google Patents
Solidification method for wet core of water-based adhesive Download PDFInfo
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- CN103302231A CN103302231A CN2013102460791A CN201310246079A CN103302231A CN 103302231 A CN103302231 A CN 103302231A CN 2013102460791 A CN2013102460791 A CN 2013102460791A CN 201310246079 A CN201310246079 A CN 201310246079A CN 103302231 A CN103302231 A CN 103302231A
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Abstract
The invention discloses a solidification method for a wet core of a water-based adhesive, and in particular relates to a method for solidifying a wet core of a water-based adhesive by microwaves. The adhesive can be an inorganic adhesive material, an organic material or any adhesive material which can be dissolved in water. Compared with conventional heating methods, the microwave heating method relates to internal heating and has the characteristics of high heating speed, temperature uniformity, zero lagging effect and the like, so that the solidification speed can be enhanced. In a solidification process for cores with the same mass, a core manufacturing process is more energy-saving than that of the conventional method, and the energy consumption is less than 1/15 of that of the conventional method; the solidification efficiency is higher, and the time consumption is only 1/10 of that of the conventional method; the cost is lower; the efficiency is higher; when the solidification method is applied to a thick and large core, the water content of the core is lower; the pouring quality of a casting can be greatly improved; furthermore, the microwaves have a small heating effect on a die, and in a die solidification process, the temperature is extremely low, so that the size of the core can be fully guaranteed.
Description
Technical field
The present invention relates to the curing of core in a kind of casting industry, be specifically related to a kind of microwave curing method of aqua type binding agent hygrometric state core.
Background technology
Existing casting core curing is to utilize heating mould that it is solidified, or blows in the core of making or the method for adding curing agent or curing catalysts is cured.These curings are not need to consume a lot of energy, can bring to environment exactly and pollute or consume the energy, increase cost for contaminated solution.
Microwave refers to that frequency is the electromagnetic wave of 0.3～300GHz.Material can produce the physical phenomenons such as intensification, melting under microwave action, also chemical reaction can occur simultaneously.Microwave can make chemical reaction under identical temperature even lower temperature, produces the efficient than high several times even tens times of conventional method.At present, microwave solidifies mainly for the larger heat reactive resin system of the dielectric dissipation factors such as epoxy resin, polyurethane.The research of microwave curing system relates generally to the systems such as radical polymerization (such as acrylic resin, unsaturated polyester (UP)/styrene system), lactone ring opening polymerization, epoxy resin/amine, epoxy resin/acid anhydrides.Also have as sodium silicate sand in wood mold coupled interior curing, but the problem such as curing efficiency is low, and the intensity of molding sand core is low only rests on to adopt and carry out in the daily small microwave stove, can not satisfy industrialized production application.
Summary of the invention
The method that the object of the present invention is to provide a kind of microwave that the coremaking of aqua type binding agent hygrometric state core is cured.
For achieving the above object, technical scheme of the present invention is: a kind of curing of aqua type binding agent hygrometric state core, and its concrete grammar is as follows:
The sand step is penetrated in coremaking, and the surface has been wrapped aqua type binding agent casting sand, and with certain gas sand ratio, the compressed air with 0.3～0.6Mpa pressure is injected in the mold cavity by core making machine, keeps pressure 2～10s of 0.3～0.6Mpa;
The coremaking heating steps is opened the microwave generating mechanism, makes microwave pass mold and enters the interior aqua type binding agent casting core of mold cavity, and microwave frequency is 0.3～300GHz, and be 30～600s heat time heating time.
When adopting technique scheme, the method that the present invention then adopts microwave that the coremaking of aqua type binding agent hygrometric state core is cured, its binding agent that contains can be the inorganic nature binding material, also can be the Organic material and can with any adhesive material of the molten breast of water.The present technique method is to utilize microwave to produce heat, be so-called microwave " thermal effect ", the core internal temperature is raise and the generation curing reaction, mode of heating with respect to routine, microwave is a kind of interior heating, have that firing rate is fast, temperature evenly, without characteristics such as hysteresis effects, therefore can accelerate curing rate.Simultaneously, microwave plays facilitation to the curing chemistry reaction of aqua type binding agent, and making on the one hand is that reactant molecule has absorbed microwave energy, has improved molecular motion speed, causes molecular motion disorderly and unsystematic, causes the increase of entropy; The effect of microwave polar molecule that binding agent is contained forces it to move according to the electromagnetic field effect mode on the other hand, has caused the minimizing of entropy.Can not only describe with the microwave thermal effect when therefore, microwave is fierce to the effect of the chemical reaction of aqua type binding agent.Microwave is except having fuel factor, and also existing a kind of is not the non-thermal effect that temperature causes.Organic reaction under the microwave action, changed kinetics, lowered reaction activity, the microwave non-thermal effect may play decisive action to the acceleration of reaction, microwave has reduced the activation energy of reaction, the chemical gel that microwave is used for the binding agent that core contains is synthetic, and it is solid-state by microwave action aqueous water fundamental mode binding agent to be become, and is exactly a kind of coremaking microwave curing technical method of aqua type binding agent hygrometric state core.In the core solidification process journey of equal in quality, the more existing conventional method of manufacturing mold core process is more energy-conservation, and energy consumption is less than 1/15th of the conventional method energy consumption, and curing efficiency is higher, and 1/10th durations of conventional method are only arranged, and cost is lower, and efficient is higher; For thick large core chipware, lower water content can be improved the casting pouring quality greatly, and simultaneously, because microwave is small to the heat effect of mould, temperature is very low in the mold cured process, can fully guarantee the size of core members.
Further, described microwave frequency is 900～20000MHz.
Further, the material of described mould comprises engineering plastics, engineering organic composite material, pottery or ceramic composite, high-purity siliceous.The mould that adopts above-mentioned material to make has enough intensity and heat resistance, has to make the microwave penetration mold, reaches the purpose of heating using microwave.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the schematic diagram of heating using microwave mechanism among the curing embodiment of a kind of aqua type binding agent of the present invention hygrometric state core;
Fig. 2 is the structural representation of mould among the curing embodiment of a kind of aqua type binding agent of the present invention hygrometric state core.
The specific embodiment
The curing of a kind of aqua type binding agent of the present invention hygrometric state core, its concrete grammar is as follows:
The sand step is penetrated in coremaking, the surface has been wrapped aqua type binding agent casting sand, by core making machine with certain gas sand ratio, compressed air with 0.3～0.6Mpa pressure is injected in the mold cavity, keep pressure 2～10s(of 0.3～0.6Mpa when pressure is 0.3Mpa, to keep 10 seconds, when pressure is 0.6 Mpa, kept 2 seconds);
The coremaking heating steps is opened the microwave generating mechanism, makes microwave pass mold and enters the interior aqua type binding agent casting core of mold cavity, and microwave frequency is 0.3～300GHz, and be 30～600s heat time heating time.
As shown in Figure 1, heating using microwave mechanism has power-supply system, microwave generator 1, heating using microwave control system, switch and shielding body 2, and microwave generator 1 is looped around around the mold 3.When heating using microwave mechanism opened, the microwave electromagnetic waves of sending in the microwave generator 1 was will spigot die concrete 3, saw through the water based adhesive core in the core chamber and produced solidification.Step is, sets heating using microwave control program parameter, closes shielding body 2, adjust microwave generator 1 and the relative position relation that is heated mold 3 and be looped around around the mold 3 to guarantee it,
As shown in Figure 2, the structure of mold 3 includes external mold body mechanism 31, in addition can be so that the steam of curing is by the passage 33 of negative pressure sucking-off in the core inner chamber 32 between the structure of core inner chamber 32 and external mold body mechanism 31; Passage 33 has an end and is communicated with core inner chamber 32, and an end communicates with negative-pressure adsorption mechanism.
The material of described mould comprises engineering plastics, engineering organic composite material, pottery or ceramic composite, high-purity siliceous.Any two or more composite of above-mentioned material, or the synthesis that makes up of any two or more assembly of above-mentioned material.
Above-described only is preferred embodiment of the present invention, should be understood that, for a person skilled in the art, under the prerequisite that does not break away from design concept of the present invention, can also make some distortion and improvement, for example: the frequency of microwave can be adjusted to 900～20000MHz, the heating frequency 0.3～300GHz of microwave with heat time heating time 30～600s corresponding; Be that frequency is 600s heat time heating time when being 0.3GHz, be 30s heat time heating time when frequency was 300GHz.These also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.
Claims (3)
1. the curing of an aqua type binding agent hygrometric state core, its concrete grammar is as follows:
The sand step is penetrated in coremaking, and the surface has been wrapped aqua type binding agent casting sand, and with certain gas sand ratio, the compressed air with 0.3～0.6Mpa pressure is injected in the mold cavity by core making machine, keeps pressure 2～10s of 0.3～0.6Mpa;
The coremaking heating steps is opened the microwave generating mechanism, makes microwave pass mold and enters the interior aqua type binding agent casting core of mold cavity, and microwave frequency is 0.3～300GHz, and be 30～600s heat time heating time.
2. the curing of a kind of aqua type binding agent hygrometric state core according to claim 1 is characterized in that, described microwave frequency is 900～20000MHz.
3. the curing of a kind of aqua type binding agent hygrometric state core according to claim 1 and 2 is characterized in that, the material of described mould comprises engineering plastics, engineering organic composite material, pottery or ceramic composite, high-purity siliceous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013102460791A CN103302231A (en) | 2013-06-20 | 2013-06-20 | Solidification method for wet core of water-based adhesive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102460791A CN103302231A (en) | 2013-06-20 | 2013-06-20 | Solidification method for wet core of water-based adhesive |
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| CN103302231A true CN103302231A (en) | 2013-09-18 |
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| CN2013102460791A Pending CN103302231A (en) | 2013-06-20 | 2013-06-20 | Solidification method for wet core of water-based adhesive |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017152348A1 (en) * | 2016-03-07 | 2017-09-14 | 苏州明志科技有限公司 | Core making machine with integrated microwave curing function |
| CN108075056A (en) * | 2016-11-10 | 2018-05-25 | 罗伯特·博世有限公司 | For manufacturing the joint method of battery and battery |
| CN112517841A (en) * | 2020-11-26 | 2021-03-19 | 浙江省机电设计研究院有限公司 | Microwave heating resin sand core forming device and method thereof |
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| JP2004249340A (en) * | 2003-02-21 | 2004-09-09 | Mazda Motor Corp | Water-soluble mold for casting and its manufacturing method |
| CN1538887A (en) * | 2001-08-10 | 2004-10-20 | ��ķ�չ���ʦ����˾ | Method and device for production of molds or cores for foundry purposes |
| EP2392424A1 (en) * | 2004-09-02 | 2011-12-07 | AS Lüngen GmbH | Method for producing casting moulds for metal processing, casting moulds produced according to the method and the use of same |
| CN202683976U (en) * | 2012-08-27 | 2013-01-23 | 重庆长江造型材料（集团）有限公司 | Silicate inorganic binder sand core shooter |
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2013
- 2013-06-20 CN CN2013102460791A patent/CN103302231A/en active Pending
Patent Citations (6)
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| KR910009367B1 (en) * | 1985-05-07 | 1991-11-14 | 가부시끼가이샤 고마쓰 세이사꾸쇼 | Process for making foundry molds |
| US4705570A (en) * | 1985-11-05 | 1987-11-10 | American Cyanamid Company | Method of manufacturing a bonded particulate article by reacting a polyol and a meterocyclic compound |
| CN1538887A (en) * | 2001-08-10 | 2004-10-20 | ��ķ�չ���ʦ����˾ | Method and device for production of molds or cores for foundry purposes |
| JP2004249340A (en) * | 2003-02-21 | 2004-09-09 | Mazda Motor Corp | Water-soluble mold for casting and its manufacturing method |
| EP2392424A1 (en) * | 2004-09-02 | 2011-12-07 | AS Lüngen GmbH | Method for producing casting moulds for metal processing, casting moulds produced according to the method and the use of same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017152348A1 (en) * | 2016-03-07 | 2017-09-14 | 苏州明志科技有限公司 | Core making machine with integrated microwave curing function |
| CN109311079A (en) * | 2016-03-07 | 2019-02-05 | 苏州明志科技有限公司 | A kind of core making machine being integrated with microwave curing function |
| CN108075056A (en) * | 2016-11-10 | 2018-05-25 | 罗伯特·博世有限公司 | For manufacturing the joint method of battery and battery |
| CN112517841A (en) * | 2020-11-26 | 2021-03-19 | 浙江省机电设计研究院有限公司 | Microwave heating resin sand core forming device and method thereof |
| CN112517841B (en) * | 2020-11-26 | 2022-06-03 | 浙江省机电设计研究院有限公司 | Microwave heating resin sand core forming device and method thereof |
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Application publication date: 20130918 |