CN103341593A

CN103341593A - Drying method for water-based binder wet mold core

Info

Publication number: CN103341593A
Application number: CN2013102460768A
Authority: CN
Inventors: 熊鹰
Original assignee: Chongqing Changjiang Moulding Material (group) Ltd By Share Ltd
Current assignee: Chongqing Changjiang Moulding Material (group) Ltd By Share Ltd
Priority date: 2013-06-20
Filing date: 2013-06-20
Publication date: 2013-10-09

Abstract

The invention relates to a drying method for a water-based binder wet mold core, and belongs to the drying method of the mold core in casting industries. Compared with a conventional heating method, microwave heating is an internal heating method, and has the characteristics of fast heating speed, uniform temperature, no hysteretic effect and the like, so that the microwave can accelerate a curing speed. In as process for the mold core with the same quality, the process for making the mold core is more energy-efficiently than that of a conventional method; the energy consumption is less than a fifteenth that of the conventional method; the curing efficiency is high, time consumption being only one tenth that of the conventional method; cost is lower; and efficiency is higher. By applying the method in a thick and large core, water content of the core is lower, so that casting quality of the casting member can be improved greatly; at the same time, microwave has little heating effect for the mold, so that the temperature of the mold during the curing process is very low, thereby full guaranteeing the size of the mold core part.

Description

The drying means of aqua type binding agent hygrometric state core

Technical field

The present invention relates to the drying means of core in a kind of casting industry, be specifically related to the method for microwave drying of aqua type binding agent hygrometric state core.

Background technology

Existing casting core drying is a kind of technical process of necessity, needs to use in a large number water based paint in cast iron, cast steel core engineering, therefore, must carry out dry to remove the excessive moisture that contains in the core to the core of implementing coating.And common drying mode is to utilize modes such as heating, infrared, far infrared, and these drying means need consume a lot of energy, increase production cost.

Microwave refers to that frequency is the electromagnetic wave of 0.3～300GHz.Material can produce physical phenomenons such as intensification, fusion under microwave action, also chemical reaction can take place simultaneously.The microwave radiant energy make chemical reaction identical temperature rise in addition lower temperature under, produce the efficient than high several times even tens times of conventional method.

Summary of the invention

The object of the present invention is to provide a kind of microwave that aqua type binding agent hygrometric state core is carried out dry method.

For achieving the above object, technical scheme of the present invention is: the drying means of aqua type binding agent hygrometric state core, and its concrete grammar is as follows: molding sand immersion fundamental mode bonding agent, carry out drying by microwave mechanism afterwards, microwave frequency is 0.3～300GHz, and be 30～600s heat time heating time.

Further, described microwave frequency is 900～20000MHz.

When adopting technique scheme, by microwave aqua type binding agent hygrometric state core is carried out drying, its binding agent that contains can be the inorganic nature binding material, also can be organic property material and can with any adhesive material of the molten breast of water.The present technique method is to utilize the microwave radiation to produce heat, and namely so-called microwave " thermal effect " raises internal temperature, mode of heating with respect to routine, microwave is a kind of interior heating, has characteristics such as firing rate is fast, temperature even, no hysteresis effect, therefore can accelerate rate of drying.Simultaneously, microwave plays facilitation to the drying 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 the microwave radiation is used for the binding agent that core contains is synthetic, and makes aqueous water fundamental mode binding agent drying by microwave action, is exactly a kind of coremaking microwave drying technology method of aqua type binding agent hygrometric state core.In the core dry run of equal in quality, more energy-conservation than the existing conventional method, energy consumption is less than 1/15th of the conventional method energy consumption, and drying efficiency is higher, and 1/10th durations of conventional method are only arranged, and cost is lower, and efficient is higher; For thick big core chipware, lower water content can be improved the casting pouring quality greatly, can fully guarantee the size of core members.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:

Fig. 1 is the flow chart of the drying means of aqua type binding agent hygrometric state core of the present invention.

The specific embodiment

Embodiment 1

The drying means of a kind of aqua type binding agent of the present invention hygrometric state core, its concrete grammar is as follows:

As shown in Figure 1, the drying means of aqua type binding agent hygrometric state core, its concrete grammar is as follows: molding sand immersion fundamental mode bonding agent, carry out drying by microwave mechanism afterwards, microwave frequency is 0.3GHz, be 600s heat time heating time.

Embodiment 2

As shown in Figure 1, the drying means of aqua type binding agent hygrometric state core, its concrete grammar is as follows: molding sand immersion fundamental mode bonding agent, carry out drying by microwave mechanism afterwards, microwave frequency is 300GHz, be 30s heat time heating time.

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 into 900～20000MHz, and these also should be considered as protection scope of the present invention, and these can not influence effect of the invention process and practical applicability.

Claims

1. the drying means of aqua type binding agent hygrometric state core, its concrete grammar is as follows:

Molding sand immersion fundamental mode bonding agent carries out drying by microwave mechanism afterwards, and microwave frequency is 0.3～300GHz, and be 30～600s heat time heating time.

2. the drying means of aqua type binding agent hygrometric state core according to claim 1 is characterized in that, described microwave frequency is 900～20000MHz.