CN2631734Y

CN2631734Y - Heater of plastic processing machine

Info

Publication number: CN2631734Y
Application number: CN 03267433
Authority: CN
Inventors: 杨栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-08
Filing date: 2003-07-08
Publication date: 2004-08-11
Anticipated expiration: 2013-07-08

Abstract

The heating unit used for plastics processing mechanics includes a heating cylinder (1), a heating area (2) that controls the temperature as to the injection molding technology, at least two heating coils L1, L2 arranged at every heating area (2). The heating coils L1, L2 after series connection are connected to the power supply (3) that is below 80 voltages. The heating coils L1, L2 adopts a metal sectional area that is over 10 mm<2>. The heating coil L 1 and the heating coil L2 adopt the series-fed technology. The heating current is enhanced dozens of times. Plus the blue heating is adopted, the heating area is enlarged. The utility model heats evenly and is better capable of ablation-resistance and ant oxygenic, which expands the life span.

Description

The plastic processing machinery heater

Technical field

The utility model relates to firing equipment, particularly is used for the heater on the plastic processing machinery.

Background technology

Conventional heating technique is to adopt the heating of power-frequency voltage total head, because heating voltage and temperature are higher, to having relatively high expectations of insulating barrier, the general high-quality mica sheet of using is as the partiting thermal insulation material, higher and the complex process of cost, and because what carry out is full voltage heating, heating-up temperature is more than 800 ℃, the insulating materials of electrothermal device more easily produces electrical breakdown, thermal ablation phenomenon, greatly reduces the reliability of electric heater unit.In addition, the heating wire diameter of routine techniques is less, heating-up temperature is higher, add the reason of conventional total head heating wire owing to manufacturing process and metallurgical technology, diameter is little having, length is big, it is inhomogeneous easily to produce the heat radiation that causes on the inhomogeneous and manufacture craft of resistance, the localized heat that very easily produces heating wire is ablated, factors such as high-temperature oxydation, very easily cause the damage of heating element heater, make heating element heater unreliable because of quality, cause producing the disadvantage of lacking service life and can't effectively be incubated, owing to can't effectively be incubated to firing equipment, what cause that conventional heater takes on process structure is that standard-sized sheet is put the external-heat structure, its heating element heater is exposed in the air fully, causes the efficiency of heating surface low, the production environment inclement condition, and the temperature during heating is subject to external interference and produces drift, has a strong impact on the improvement of product precision and production environment.

Summary of the invention

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art, and a kind of plastic processing machinery heater of low-voltage power supply is provided.

The utility model is realized by implementing following technical scheme: a kind of plastic processing machinery heater, comprise heating cylinder, the thermal treatment zone of different temperatures is set according to the requirement of Shooting Technique on heating cylinder, is arranged at least two heater coils in each thermal treatment zone around heating cylinder; Be connected in after described two heater coils are connected in series on the following power frequency supply of 80V, described heater coil adopts sectional area to surpass 10mm ²Metal make.Take the series-fed technology at the heating of the same thermal treatment zone, heating current increases more than tens times, the corresponding increase of diameter that makes heating is more than tens times, make effective area and the diameter increase and the length minimizing of heating, add the low-temperature heat technology of taking, heating surface (area) (HS is increased, heat more even, its anti-ablation, antioxygenic property greatly strengthen, prolonged its service life greatly, under the condition of making material and technological requirement strictness, its heating element heater can accomplish substantially 10 years non-maintaining.

This device has adopted the technology of low-voltage power supply, so, efficiency of heating surface height, good heat insulating, have safe and reliable, cost is low, the characteristics of good energy-conserving effect.

Description of drawings

Fig. 1 is the three-dimensional partial schematic sectional view of the utility model plastic processing machinery heater.

Fig. 2 is the circuit theory schematic diagram of the utility model plastic processing machinery heater.

Fig. 3 is that cross-sectional schematic is looked on the left side of the utility model vacuum heat-preserving mode.

The specific embodiment

Further describe embodiment of the present utility model below in conjunction with accompanying drawing.

By finding out among Fig. 1 and Fig. 2, a kind of plastic processing machinery heater, comprise heating cylinder 1, the thermal treatment zone 2 of different temperatures is set according to the requirement of Shooting Technique on heating cylinder 1, be arranged at least two heater coil L in each thermal treatment zone 2 around heating cylinder 1 ₁, L ₂Described heater coil L ₁And L ₂Be connected on the following power frequency supply 3 of 80V described heater coil L after being connected in series ₁And L ₂Adopt sectional area to surpass 10mm ²Metal make.Heater coil L in the same thermal treatment zone ₁And L ₂Take the series-fed technology, heating current increases more than tens times, makes heater coil L ₁And L ₂The corresponding increase of diameter more than tens times, make heater coil L ₁And L ₂Effective area and diameter increases and length reduces, add the low-temperature heat technology of taking, make the heating surface (area) (HS increase, heat more evenly, it is anti-ablates, antioxygenic property greatly strengthens, and prolonged its service life greatly, under the condition of making material and technological requirement strictness, its heater coil L ₁And L ₂Substantially can accomplish 10 years non-maintaining.

By finding out among Fig. 2, described power frequency supply 3 is the secondary of transformer 4, and it adopts and heater coil L ₁, L ₂Material is identical and metallic plate that resistance is different is made, and external power supply inserts the elementary of this transformer 4, described power frequency supply 3 and heater coil L ₁And L ₂Between adopt welding manner to connect.The utility model is for increasing the reliability of equipment effectively, and carried out particular design on low-voltage power supply technology and technology: 1. the power supply of each thermal treatment zone is taked from the mode of the elementary control of transformer 4 high pressure, and low-voltage secondary is then used and heater coil L ₁And L ₂Equivalent material but the different metal of resistance are made, and promptly use low resistance nickel chromium triangle band to make 4 levels of transformer, 2. with heater coil L ₁And L ₂Adopt comparatively meticulous solder technology reliably to connect during connection, make secondary current supply circuit realize the contactless operation of closed loop, to guarantee the reliability of long-term big electric current power supply, this integration power supply technology can guarantee the reliability service of whole heater effectively, accomplishes non-maintaining all the year round production.When carrying out primary controlled, adopt the controllable silicon contactless control element of high reliability, to improve the overall operation q﹠r.

By finding out described heater coil L among Fig. 1 ₁And L ₂About two sides be equipped with insulating barrier 5, described insulating barrier 5 is entwined for the quartz glass fibre band.Because the utility model adopts low pressure, low-temperature heat technology, the requirement of insulating barrier 5 is reduced greatly, this has reduced on the one hand manufactures cost, also because the requirement of insulating barrier 5 is reduced, thermal conductivity factor is increased in addition, has strengthened energy-saving efficiency effectively.

By finding out described heater coil L among Fig. 1 and Fig. 3 ₁And L ₂Also be provided with heat-insulation layer 6 outward, this device is owing to there being heat insulation effect preferably, so general heating-up temperature can be controlled at below 600 ℃.And heat preserving mode can adopt following two kinds according to actual needs, and a kind of is that described heat-insulation layer 6 comprises basic heat-insulation layer 61 and heat-insulation layer shell 62, and described basic heat-insulation layer 61 is that high temperature resistant asbestos or glass fibre cotton material are entwined.Described heat-insulation layer shell 62 is that two semicircle bodies fastening forms, and the fastening place adds the heat preserving and insulating material sealing.This heat preserving mode is a kind of traditional heat preserving method, and characteristics are exactly that cost is low, making is simple.

And another kind of mode is the muff of described heat-insulation layer 6 for bilayer, vacuumizes in its interlayer, and the inwall 63 of this muff and outer wall 64 adopt stainless steels or steel plate is zinc-plated or chromium plating is handled, and the outer surface of the inner surface of inwall 63 and outer wall 64 carries out polishing.Described heat-insulation layer 6 is that two semicircle bodies fastening forms, and the fastening place adds the heat preserving and insulating material sealing.This a kind of mode is utilized the vacuum heat-insulation principle and is designed, and characteristics are to make good heat-insulation effect.

Claims

1. plastic processing machinery heater, comprise heating cylinder (1), go up the thermal treatment zone (2) that different temperatures is set according to the requirement of Shooting Technique at heating cylinder (1), be arranged at least two interior heater coil L of each thermal treatment zone (2) around heating cylinder (1) ₁, L ₂It is characterized in that: described heater coil L ₁And L ₂Be connected on the following power frequency supply (3) of 80V described heater coil L after being connected in series ₁And L ₂Adopt sectional area to surpass 10mm ²Metal make.

2. plastic processing machinery heater according to claim 1 is characterized in that: described power frequency supply (3) is the secondary of transformer (4), and it adopts and heater coil L ₁, L ₂Material is identical and metallic plate that resistance is different is made, and external power supply inserts the elementary of this transformer (4).

3. plastic processing machinery heater according to claim 1 is characterized in that: described power frequency supply (3) and heater coil L ₁And L ₂Between adopt welding manner to connect.

4. plastic processing machinery heater according to claim 1 is characterized in that: described heater coil L ₁And L ₂About two sides be equipped with insulating barrier (5).

5. plastic processing machinery heater according to claim 4 is characterized in that: described insulating barrier (5) is entwined for the quartz glass fibre band.

6. plastic processing machinery heater according to claim 1 is characterized in that: described heater coil L ₁And L ₂Also be provided with heat-insulation layer (6) outward.

7. plastic processing machinery heater according to claim 6, it is characterized in that: described heat-insulation layer (6) comprises basic heat-insulation layer (61) and heat-insulation layer shell (62), and described basic heat-insulation layer (61) is that high temperature resistant asbestos or glass fibre cotton material are entwined.

8. plastic processing machinery heater according to claim 6, it is characterized in that: described heat-insulation layer (6) is double-deck muff, vacuumize in its interlayer, inwall of this muff (63) and outer wall (64) adopt stainless steel or steel plate is zinc-plated or chromium plating is handled, and the outer surface of the inner surface of inwall (63) and outer wall (64) carries out polishing.

9. plastic processing machinery heater according to claim 8 is characterized in that: described heat-insulation layer (6) is that two semicircle bodies fastening forms, and the fastening place adds the heat preserving and insulating material sealing.

10. plastic processing machinery heater according to claim 7 is characterized in that: described heat-insulation layer shell (62) is that two semicircle bodies fastening forms, and the fastening place adds the heat preserving and insulating material sealing.