CN101125460A - Heating cylinder on the injection nozzle connecting with injection forming system - Google Patents
Heating cylinder on the injection nozzle connecting with injection forming system Download PDFInfo
- Publication number
- CN101125460A CN101125460A CNA2006101148798A CN200610114879A CN101125460A CN 101125460 A CN101125460 A CN 101125460A CN A2006101148798 A CNA2006101148798 A CN A2006101148798A CN 200610114879 A CN200610114879 A CN 200610114879A CN 101125460 A CN101125460 A CN 101125460A
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- heat carrier
- cartridge heater
- hollow
- heating tube
- injection molding
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Abstract
The present invention discloses a hollow cartridge heater used in an injection nozzle which is connected with a injection molding system. A reedy heating pipe is rotatablely winded with the external side of the cartridge body; the heating pipe comprises two electric heating type heat carriers which have an electrical insulation with each other and are arranged in different areas along the long direction of the heating pipe; a heat carrier is used for heating the mouth area of the nozzle, while the other heat carrier is used for heating the handle area of the nozzle.
Description
Technical field
The present invention relates to be used for the cartridge heater of the injection nozzle of injection molding system.
Background technology
In order to understand problem to be solved by this invention, referring to the Fig. 1 in the accompanying drawing and Fig. 2.Fig. 1 shows injection molding system schematically.From the injection machine that links to each other via delivery cannula 3, hot melt (plastics of fusing just) is directed distributing cylinder body 2 to arrive two or more nozzles 10 through the heated type passage of heat.Nozzle 10 is placed in the accommodation hole 8 among the injection side member 5A of mould 6.Injection nozzle is connected to cavity 7 via so-called mouthful (or aperture) 13, molded parts be formed in the described cavity, and also be formed among the discharge side component 5B of mould 6 usually.
Between the temperature required and mould of hot melt temperature required, there is marked difference.For example, the treatment temperature of hot melt can be 250 ℃, and mould can have 50 ℃ temperature.This temperature difference has caused a large amount of hot-fluids from nozzle, leave at nozzle and mould position contacting point especially.This thermal loss must remedy by heated nozzle constantly.Finish this heating by means of the cartridge heater that can be connected on the nozzle.Most critical point about the cold excessively danger of hot melt is mouthful 13 places, because diminish by reducing gradually of nozzle diameter at the heat absorption capacity of this nozzle material around, and because tight contact the between nozzle and the mould.
The heating of these conditional requests nozzle in port area 12 must be greater than the heating in handle body region (shank region) 11.Required for this reason heat supply also is the shape that is fixed against very much the material of mode of operation, hot melt and mould and mouth 13 in port area 12.In addition, the heat supply must be controlled efficiently, and this is because the scope of the treatment temperature of some hot melt is very narrow.In addition, for example under the state of cooling of mould, more substantial heat must be supplied to port area 12.
Be well known that, nozzle can be equipped with two independently, all cartridge heater 20A, 20B as shown in Figure 2, more particularly, one is used for port area 12, another is used for handle body region 11.The heat carrier of these two cartridge heaters can be controlled with being mutually independent and/or adjust.Cartridge heater substantially is made of the carrying cylinder of hollow basically, and it is provided with the helicla flute that is used to hold heating tube (heating cartridge), embeds heat carrier in described helicla flute.Be used for spiral fluted pitch on the carrying cylinder of cartridge heater of port area 12 usually less than the spiral fluted pitch on the carrying cylinder that is used for handle body region 11.On the outside of cartridge heater, form protection metallic sheath 23.In Fig. 2, except nozzle is shown, the accommodation hole 8 in the mould has been described also.
A deficiency of this system known per is to need two independent cartridge heater 20A, 20B.Another deficiency is to be used for the electrical connector 34 of cartridge heater 20A of port area quite away from the front side of the direction of bead, thereby corresponding longitudinal fluting 9 (Fig. 2) must be set so that electrical connector 34 is contained in the hole 8 of injection side member 5A of mould.Except extra-pay, in some mould, this requirement also can cause the problem in space.
And, in the accommodation hole 8 of nozzle being introduced mould after, the significant danger of infringement electrical connector 34 appears.In Fig. 2, Reference numeral 35A representative is used for the electrical connector of the temperature sensor of cartridge heater 20B.The corresponding temperature sensor that is used for cartridge heater 20A is also not shown.
Summary of the invention
The purpose of this invention is to provide a kind of improved heating system that is used for the injector nozzle.
Only utilize a cartridge heater according to system of the present invention, rather than in current system the cartridge heater independently of two known.According to the present invention, elongated heating tube is wound in a spiral on the outside of cartridge heater of hollow.Heating tube comprises two electrical heating type heat carriers, and they are electric insulation each other, and vertically is arranged in roughly different zones along heating tube.A heat carrier is settled mouth (aperture) zone that is used for heated nozzle, and another heat carrier is settled the handle body region that is used for heated nozzle.Thereby, omitted electrical connector 34, its in the prior art, the Cylinder shape constructional element from the cartridge heater of port area in port area radially outward stretches out.Therefore, can save the pockets 9 that is used for nozzle accommodation hole 8 this connector, mould.In addition, the requirement for the space in the cable channel of system also reduces, and this is because only need an ISO cable that is used for two heating connectors.According to the present invention, realize significantly saving cost.
Description of drawings
Be described with reference to the accompanying drawings the present invention, wherein:
Fig. 1 shows the schematic diagram according to the injection molding system of prior art;
Fig. 2 shows the injection nozzle with two independent cartridge heaters according to prior art;
Fig. 3 shows the injection nozzle that has according to the embodiment of cartridge heater of the present invention;
Fig. 4 shows the illustrative examples that is used for according to the heating tube of cartridge heater of the present invention;
Fig. 5 shows the illustrative examples that is used for according to the carrying cylinder of cartridge heater of the present invention.
The specific embodiment
Figure 4 illustrates illustrative examples according to heating tube of the present invention.Heating tube 30 comprises two heat carriers 32 and 33, and they are reeled to form the spiral heating coil.Heater coil is contained in the metallic sheath 31, and in described metallic sheath, described heater coil is become traditional electric insulation complex 40 by embedding.Heater coil 32 is positioned at cover 31 front side (die side) part B1, and compartment of terrain and be positioned at the remainder B2 of cover 31 with the heater coil 32 of heater coil 32 electric insulations.The electrical connector 34 of two heater coils and 35 is stretching out metallic sheath 31 with the opposite end of heater coil 32.
The length of heating tube 30 is much larger than its diameter, and this is in Fig. 4 and can not find out easily that Fig. 4 has only schematically shown the structure of heating tube.In practice, heating tube 30 is similar to elongated plastic deformation bar or wire rod, and is wound on the carrying cylinder of all hollow of schematic 21 as shown in Figure 5.In order to guide the heating tube that will be reeled, the outside of carrying cylinder 21 is provided with helicla flute 22, and the pitch of described helicla flute in the B1 of oral-lateral zone is significantly less than the pitch in handle body region B2.The length of heater coil 32,33 is adjusted with respect to carrying cylinder, thereby the pitch of the laps of the helicla flute 22 that closely is close together in port area B1 is roughly received by heater coil 32, and is provided with in handle body region B2 more that the pitch of the laps of the helicla flute 22 of coarse pitch is roughly received by heater coil 33.The connector 34 of these two heater coils and 35 locates to stretch out cartridge heater 20 at A (Fig. 5).Protective sleeve 23 is placed on the radial outside of the carrying cylinder 21 that is provided with heating tube 30, and is also not shown but shown in Figure 3 in Fig. 5.
Fig. 3 shows nozzle 100, is connected on the described nozzle according to the cartridge heater 20 of hollow of the present invention.It can be seen that whole injection nozzle 100 does not comprise any part of radially protruding along its whole length, as the known injection nozzle of Fig. 2.What it can also be seen that is that the accommodation hole 8 shown in the mould also needs groove 9 (see figure 2)s unlike needed in the art.The end that the electrical connector 34,35 of these two heater coils is positioned at away from the nozzle of mould, and be positioned at the outside of accommodation hole 8.The thin connecting line that is used for the temperature sensor in port area and the handle body region lays respectively in the little longitudinal fluting 24 and 25 in the protective sleeve 23, thus, can radially not expand.
As in the prior art, can control or adjustment heating independently in the port area of nozzle and in the handle body region.Preferably, among the port area B1 on the carrying cylinder 21 thickness of the pitch of the laps of heating tube 30 bigger, but that this is not the present invention is necessary.
Yet, advantageously, because if used identical pitch in two zones, then the ability of the loaded current of heater coil 32 must be higher than the ability of the loaded current of heater coil 33, and the result is that the conduction size of the heater coil in two zones is inequality.
Although illustrated and illustrated different embodiment of the present invention, clear to those skilled in the art multiple remodeling and optional embodiment.Therefore, expectation is that the present invention only limits to claims.
Claims (13)
1. the cartridge heater of the hollow on the injection nozzle that is connected injection molding system, described cartridge heater comprises elongated heating tube, it is wound in a spiral in the outside of described cartridge heater, described heating tube comprises the first electrical heating type heat carrier and the second electrical heating type heat carrier, described heat carrier is electric insulation each other, and vertically be positioned at the zone that is different in essence along described heating tube, described first heat carrier is provided for heating the port area of injection nozzle, and described second heat carrier is provided for heating the handle body region of injection nozzle.
2. the cartridge heater of hollow according to claim 1 is characterized in that, described first heat carrier and described second heat carrier comprise electrical connector, and wherein said electrical connector is arranged on and described first heat carrier end opposite, described heating tube.
3. the cartridge heater of hollow according to claim 1 is characterized in that, described heat carrier comprises the spiral heating coil.
4. the cartridge heater of hollow according to claim 1 is characterized in that, described heating tube is placed in the helicla flute on the outer surface of described cartridge heater.
5. the cartridge heater of hollow according to claim 4 is characterized in that, the described helicla flute in the zone of contiguous described first heat carrier has than pitch littler in all the other zones.
6. the cartridge heater of hollow according to claim 1 is characterized in that, also comprises the outer jointing jacket around described cartridge heater.
7. the cartridge heater of hollow according to claim 6 is characterized in that, also comprises the longitudinal fluting that is arranged in described protective sleeve, and it is used to settle the port area that is used for described nozzle and the temperature sensor of handle body region.
8. injection molding system, comprise at least one mould and at least one injection nozzle, this injection molding system is characterised in that, also comprise the cartridge heater that is arranged on the hollow on the described injection nozzle, the cartridge heater of described hollow comprises the elongated heating tube of body member and the described body member of screw winding, be provided with first heat carrier and second heat carrier in described heating tube, described first heat carrier and described second heat carrier vertically are arranged in different zones along described body member.
9. injection molding system according to claim 8 is characterized in that, has helicla flute on the outer surface of described body member, and described elongated heating tube is arranged on the described helicla flute.
10. injection molding system according to claim 9 is characterized in that described helicla flute comprises first pitch, and it is suitable for settling described first heat carrier; And second pitch that is different from described first pitch, it is suitable for settling described second heat carrier.
11. injection molding system according to claim 9 is characterized in that, described first heat carrier and described second heat carrier comprise the spiral heating coil respectively.
12. injection molding system according to claim 8 is characterized in that, also comprises the cover member of settling the cartridge heater that covers described hollow.
13. injection molding system according to claim 12 is characterized in that, also comprises the temperature sensor that is arranged in the described cover member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101148798A CN101125460A (en) | 2006-08-16 | 2006-08-16 | Heating cylinder on the injection nozzle connecting with injection forming system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101148798A CN101125460A (en) | 2006-08-16 | 2006-08-16 | Heating cylinder on the injection nozzle connecting with injection forming system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101125460A true CN101125460A (en) | 2008-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101148798A Pending CN101125460A (en) | 2006-08-16 | 2006-08-16 | Heating cylinder on the injection nozzle connecting with injection forming system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101125460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001166A (en) * | 2010-11-12 | 2011-04-06 | 台州市黄岩炜大塑料机械有限公司 | Heating mechanism inside steel skeleton mould cavity of PE (Poly Ethylene) pipe mould |
-
2006
- 2006-08-16 CN CNA2006101148798A patent/CN101125460A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001166A (en) * | 2010-11-12 | 2011-04-06 | 台州市黄岩炜大塑料机械有限公司 | Heating mechanism inside steel skeleton mould cavity of PE (Poly Ethylene) pipe mould |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20080220 |