CN201677460U

CN201677460U - Rapidly-heating injection-machine hot nozzle device

Info

Publication number: CN201677460U
Application number: CN2010201589754U
Authority: CN
Inventors: 李承哲; 宣海映
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-09
Filing date: 2010-04-09
Publication date: 2010-12-22
Anticipated expiration: 2020-04-09

Abstract

The utility model discloses a rapidly-heating injection-machine hot nozzle device, comprising a heated body. A runner is arranged in the heated body, wherein the heated body is wound with a high-frequency magnetic coil, and an electric-thermal control box is connected with the high-frequency magnetic coil. The electric-thermal control box comprises an electromagnetic generating substrate and a temperature control meter core. The heated body is heated by electromagnetic induction, the heating speed is fast, the output frequency is 0.03 seconds/ time, and the heating effect is not influenced by the contact effect of a heating coil and a mould. The plastics needing high temperature can also be molded. In the cooling process, the heated body has no heat supply, and cooling water brings out heat to rapidly lower the temperature.

Description

But the hot mouth device of a kind of injection machine of Fast Heating

Technical field

The utility model relates to injection machine, but relates in particular to a kind of hot mouth device of injection machine of Fast Heating.

Background technology

Current social plasthetics has obtained using widely, and most of plasthetics has a fixed structure and shape, so that bring into play required function.For obtaining the plasthetics of required form and structure, people adopt Shooting Technique to realize.Usually Shooting Technique is that solid-state plastic material is entered injection machine by hopper, the heating back enters hot machine mouth by the effect of certain pressure in the injection machine gun barrel, hot machine mouth continues heating, make plastic cement continue to keep molten condition, inject the cavity of mould under pressure, after the cooling, but just plasthetics is taken out in die sinking.At present, with the hot mouth body heating of injection-moulding device all is to heat by resistive heater, electric energy is converted to heat energy, make firing rate slow, make the frequency of hot mouth body output melt plastic cement be 1-2 second/time, the distance of resistance wire and die joint (PL) is generally 10-15MM, this segment distance can be descended by heating and melting plastic cement temperature no longer, make product quality be subjected to certain influence, add thermal effect and can be subjected to heating wire contacts effect with body influence, if loose contact is subjected to thermal effect just bad, the maximum temperature that can raise is restricted, and generally is up to 400 degree; Can only maybe can only chew structure for being fixed as needle valve heat for being fixed as open hot mouth, both can not exchange; Its cooling is also slower, and in cooling procedure, hot mouth body is also ceaselessly by the resistive heater additional heat.

Therefore, how to realize injection-moulding device hot mouth body Fast Heating, temperature is higher and can fast cooling be a technical problem that needs to be resolved hurrily in the industry.

The utility model content

The utility model is to solve the hot mouth body heating of existing injection machine and the technical problem that cooling is slow, temperature is not high enough, output frequency is not high yet, but a kind of Fast Heating, cooling is fast, temperature is higher and output frequency the is high hot mouth device of injection machine are provided.

For solving the problems of the technologies described above, the technical scheme that the utility model provides is: but the hot mouth device of a kind of injection machine of Fast Heating, comprise the body that is heated, be provided with runner in this body that is heated, wherein, be wound with the high frequency field coil on the described body that is heated, an electric heating control cabinet is connected with described high frequency field coil.

Wherein, described electric heating control cabinet comprises electromagnetism generation substrate and temperature control table core.

Wherein, described high frequency field coil is surrounded by one deck heat-barrier material outward.

Wherein, the outlet of the lower end of described high frequency field coil and runner distance is 3 to 8MM.

Compared with prior art, the electromagnetic induction heating that the utility model produces by the high frequency field coil body that is heated, firing rate is fast, output frequency is 0.03 second/time, adding thermal effect is not subjected to heating wire to contact the influence of effect with mould, heated body self heating-up temperature can add De Genggao, need the plastics of higher temperature can moulding for some, as PPS, LCP etc., open structure and needle valve can be changed each other, the type of minimizing standard, in cooling procedure, heated body does not have heat supplement, cooling water is taken away heat, can lower the temperature rapidly.

Description of drawings

Below in conjunction with drawings and Examples the utility model is made detailed explanation, wherein:

Fig. 1 is the schematic diagram of the utility model preferred embodiments;

Fig. 2 is the be heated cutaway view of body of the utility model.

The specific embodiment

As shown in Figure 1, but the hot mouth device of a kind of injection machine of Fast Heating, comprise the body 1 that is heated, be provided with runner 2 in this body that is heated, wherein, be heated and be wound with high frequency field coil 3 on the body 1, also being provided with the electric heating control cabinet 4 that includes electromagnetism generation substrate 41 and temperature control table core 42 is connected with described high frequency field coil, power supply 220V50Hz is input to temperature control table core 42 conversion backs and forms an output current, this electric current is input to electromagnetism generation substrate 41 again, electromagnetism generation substrate 41 is with the current conversion direct current and uprise and frequently be input to high frequency field coil 3, forms a sealing current loop.High frequency field coil 3 outer one deck heat-barrier materials that are surrounded by; The outlet distance L of the lower end of high frequency field coil 3 and runner 2 is 3 to 8MM.

Temperature control table core 42 is to adopt transmitter that temperature signal is transformed to DC potential input recorder to carry out record, compare with setting value simultaneously, deviation is sent into the PID adjuster, regulate output direct current signal 4-20mA to the silicon controlled power modulation device, change the power output of power regulating eqiupment, this power is input to electromagnetism generation substrate 41; Electromagnetism generation substrate 41 is that the AC rectification that temperature control table core 42 is imported 220V50/60Hz is become direct current, again direct current is converted to the high-frequency high-voltage that frequency is 20-40KHz, the high-frequency high-voltage current that changes flows through the alternating magnetic field that coil can produce the high speed variation at a high speed, when the magnetic line of force in the magnetic field can produce countless little eddy current during by the magnetic conductive metal material in metallic object, make metal material heating at a high speed voluntarily itself, chew interior plastics thereby reach heating of metal material heat, the direction of arrow is current direction among the figure.

High frequency is to utilize the electromagnetic field of high frequency to make the mutual fierce purpose that generation high temperature reaches welding and welding of colliding between the material interior molecules, operation principle is that dielectric material issues muon polarization phenomenon estranged in the effect of high-frequency electric field, and press direction of an electric field and arrange, because of high-frequency electric field, change direction at a terrific speed, then dielectric material will generate heat because of dielectric loss.

Connecting external power source gives the electric heating control cabinet 4 power supplies, energising back high frequency field coil 3 produces magnetic induction line 5, as shown in Figure 2, electromagnetic induction heating, firing rate is fast, output frequency is 1 time/0.03 second, and solenoid bottom and die joint (being the outlet of runner 2) distance L is 3-8MM, is in good molten condition before short distance makes material go into mould.This device adds thermal effect and is not subjected to heating wire to contact the influence of effect with mould, it is higher that temperature can add, and for some plastic shapings that needs higher temperature, can use this device as PPS, LCP etc., open structure and needle valve can be changed each other, be reduced the type of standard.Also cooling fast, in cooling procedure, heated body does not have heat supplement, and cooling water is taken away heat, can lower the temperature rapidly.

Abovely the utility model is specifically described, but those skilled in the art can make numerous variations or variation to these embodiments these changes and changing within the scope that should fall into the utility model protection in conjunction with better embodiment.

Claims

1. but the hot mouth device of the injection machine of a Fast Heating, comprise the body that is heated (1), be provided with runner (2) in this body that is heated, it is characterized in that: be wound with high frequency field coil (3) on the described body that is heated (1), an electric heating control cabinet (4) is connected with described high frequency field coil.

2. the hot mouth device of injection machine according to claim 1 is characterized in that: described electric heating control cabinet (4) comprises electromagnetism generation substrate (41) and temperature control table core (42).

3. the hot mouth device of injection machine according to claim 2 is characterized in that: the outer one deck heat-barrier material that is surrounded by of described high frequency field coil (3).

4. according to claim 2 or the hot mouth device of 3 described injection machines, it is characterized in that: the outlet of the lower end of described high frequency field coil (3) and runner (2) distance (L) is 3 to 8MM.