CN102689400A - Forming process for combining PA6T and metal insert - Google Patents
Forming process for combining PA6T and metal insert Download PDFInfo
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- CN102689400A CN102689400A CN2012102180546A CN201210218054A CN102689400A CN 102689400 A CN102689400 A CN 102689400A CN 2012102180546 A CN2012102180546 A CN 2012102180546A CN 201210218054 A CN201210218054 A CN 201210218054A CN 102689400 A CN102689400 A CN 102689400A
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Abstract
The invention discloses a forming process for combining PA6T and a metal insert. The forming process comprises the following steps of: (1) before injection moulding, carrying out pre-heating treatment on the metal insert so as to enable the temperature of the surface of the metal insert to reach 280-360 DEG C; (2) placing the preheated metal insert into a mould to carry out injection moulding so as to enable the temperature of the PA6T material to reach 280-360 DEG C; and (3) keeping the pressure, cooling down and demoulding to obtain the combined PA6T and metal insert. Through the forming process for combining the PA6T and the metal insert, disclosed by the invention, a problem that the metal insert and a plastic assembly are easy to remove under stress after a glass-reinforced plastic combined assembly is formed because the circumference of the metal insert generates overlarge inner stress during forming is solved.
Description
Technical field
The invention belongs to the functional high molecule material technical field, be specifically related to a kind of PA6T, be i.e. the moulding process that combines with metal insert of polyamide 6 T.
Background technology
PA6T is a kind of based on terephthalic acid (TPA), the upgrading nylon 6T of adipic acid and hexamethylene diamine, and its fusing point is up to 310 ℃.The key property of PA6T is excellent high temperature rigid, dimensional stability and chemical-resistant.Excellent characteristic makes PA6T comprise auto parts in a lot of fields, is widely used on machine components and the electrical/electronic part.
For many years, the technology that plastic-steel combines use always, comprises that adding metal insert, plastics in the injection moulding process carries out metal insert and heat and technology such as be pressed into.Because metal insert is varied with the form that combines of plastic; Present plastic-steel conjunction plastic and the stressed caducous problem of steel part occur through regular meeting in moulding or utilization process; Shorten the service life of plastic-steel conjunction greatly, also limited the application of plastic-steel conjunction simultaneously.
For this reason, the plastic-steel combined process of we pin PA6T is studied, and sums up a kind of technological standards of PA6T when combining with metal insert.
Summary of the invention
The moulding process that the object of the present invention is to provide a kind of PA6T to combine with metal insert, this technology can solve metal insert and stressed caducous problem appears in plastic after moulding.
The present invention realizes through following technical scheme:
The moulding process that a kind of PA6T combines with metal insert is characterized in that, comprises the steps:
1) before the injection mo(u)lding, metal insert is carried out The pre-heat treatment, make the metal insert surface temperature reach 280 ℃-360 ℃;
2) put into mould to the metal insert after the preheating and carry out injection moulding, the temperature of PA6T material is 280 ℃-370 ℃;
3) pressurize, cooling, the demoulding promptly get.
Said metal insert is steel, copper or aluminium.
Said injection pressure is 60-80MPa
,The pressure of pressurize is 50-70MPa, and the dwell time is 10-15s, and be 25-30s cool time.Finishing back metal insert surface temperature in pressurize is 280 ℃-356 ℃.
Moulding process of the present invention; Before injection mo(u)lding, earlier that the metal insert surface clean is clean, the back is put into high temperature oven to metal insert and is heated; Set and the observed temperature detection through the temperature of high temperature oven; Come the metal insert temperature in the baking oven is carried out management and control, make the metal insert surface temperature reach 280 ℃-360 ℃, preferred 310 ℃-340 ℃; When the metal insert after the preheating is put into mould and is carried out injection moulding; The temperature of PA6T material is 280 ℃-360 ℃; Preferred 310 ℃-340 ℃; The metal insert surface temperature sensor interior with being contained in mould carries out the surface and contacts, and through the temperature sensor in the mould, monitors the variation of metal insert surface temperature in the inserts injection moulding process in real time; Adopting known injection molding process to prepare product then.
The present invention compared with prior art has following beneficial effect:
The present invention is through studying technology; Sum up the temperature relation of PA6T material when combining with metal insert; The surface temperature of metal insert is controlled between 280 ℃-360 ℃ all the time; The temperature of PA6T material is in the time of 280 ℃-360 ℃, and plastic-steel combines firmly, when moulding, has avoided producing excessive internal stress and causing the plastic-steel conjunction metal insert and the stressed caducous problem of plastic after moulding, to occur around the metal insert.
Description of drawings
Fig. 1 is a plastic-steel composition surface viscous force method of testing sketch map
Fig. 2 is the side view of Fig. 1
Fig. 3 is the vertical view of Fig. 1
1, metal insert 2, plastic 3, fixed position 4, thrust direction.
The specific embodiment
Further specify the present invention through the specific embodiment below, following examples are preferred implementation of the present invention, but embodiment of the present invention does not receive the restriction of following embodiment.
Plastic-steel faying face of the present invention is that semicircle engages, and the radius R of metal insert is 45mm, highly is 85mm, and the peripheral radius R of plastic is 80mm, highly is 55mm.Before injection mo(u)lding; With surface roughness is that the P20 metal insert surface clean of Ra0.05 is clean; Putting into high temperature oven to metal insert heats; Set and the observed temperature detection through the temperature of high temperature oven, come the metal insert temperature in the baking oven is carried out management and control, the metal insert surface temperature is as shown in table 1; When the metal insert after the preheating was put into mould and carried out injection moulding, the metal insert surface temperature sensor interior with being contained in mould carried out the surface and contacts, and through the temperature sensor in the mould, monitors the variation of metallic surface temperature in the inserts injection moulding process in real time; Last pressurize, cooling, the demoulding promptly get product, and environment temperature extraneous during pressurize is a room temperature, and it is as shown in table 1 that pressurize finishes afterwards metal insert surface temperature, injection pressure, dwell pressure dwell time, cool time.
Product after the moulding was placed 24 hours, let the crystallization of PA6T and after-contraction reach stable, carry out the thrust test to the plastic-steel conjunction then.The gained result is as shown in table 1.
The viscous force method of testing is following:
Shown in Fig. 1-3; After the product after the moulding is placed 24 hours; Fixing plastic two ends, the upper and lower side at metal insert promotes with the power perpendicular to metal insert and inserts central plane then, breaks away from up to metal insert and plastic and comes; In the process that promotes, get the maximum thrust that plastic separates, thereby draw the scope of the maximum combined power that plastic-steel combines under the different condition.
Table 1
| ? | The metal insert surface temperature (℃) | The PA6T material temperature (℃) | Surface temperature after the metal insert pressurize finishes (℃) | Molding parameter: injection pressure MPa (P Annotate), packing pressure MPa (P Protect), dwell time S (S Protect), cool time S (S Cold） | Plastic-steel combines maximum thrust (N) |
| Comparative Examples 1 | Q=25 | 330 | Q=175 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | ?F=7 |
| Comparative Examples 2 | Q=275 | 320 | Q=297 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=33 |
| Comparative Examples 3 | Q=250 | 350 | Q=290 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=28 |
| Comparative Examples 4 | Q=270 | 330 | Q=295 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=29 |
| Comparative Examples 5 | Q=380 | 370 | Q=372 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=30 |
| Comparative Examples 6 | Q=450 | 320 | Q=380 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=28 |
| Comparative Examples 7 | Q=375 | 330 | Q=350 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=43 |
| Comparative Examples 8 | Q=390 | 320 | Q=351 | P Annotate=63, P Protect=60, S Protect= 10, S Cold=26 | F=36 |
| Embodiment 1 | Q=280 | 330 | Q=303 | P Annotate=73, P Protect=65, S Protect= 12, S Cold=28 | F=58 |
| Embodiment 2 | Q=360 | 320 | Q=338 | P Annotate=73, P Protect=65, S Protect= 12, S Cold=28 | F=56 |
| Embodiment 3 | Q=340 | 280 | Q=307 | P Annotate=73, P Protect=65, S Protect= 12, S Cold=28 | F=62 |
| Embodiment 4 | Q=350 | 360 | Q=356 | P Annotate=63, P Protect=65, S Protect= 12, S Cold=28 | F=56 |
| Embodiment 5 | Q=290 | 290 | Q=285 | P Annotate=73, P Protect=65, S Protect= 12, S Cold=28 | F=55 |
| Embodiment 6 | Q=300 | 300 | Q=297 | P Annotate=73, P Protect=65, S Protect= 12, S Cold=28 | F=58 |
| Embodiment 7 | Q=310 | 310 | Q=306 | P Annotate=70, P Protect=60, S Protect= 12, S Cold=25 | F=63 |
| Embodiment 8 | Q=325 | 325 | Q=319 | P Annotate=68, P Protect=60, S Protect= 13, S Cold=28 | F=69 |
| Embodiment 9 | Q=330 | 330 | Q=325 | P Annotate=68, P Protect=60, S Protect= 15, S Cold=28 | F=70 |
| Embodiment 10 | Q=340 | 340 | Q=333 | P Annotate=68, P Protect=60, S Protect= 13, S Cold=28 | F=67 |
Result by the foregoing description and Comparative Examples can find out, when the metal insert surface temperature finally reaches between 280 ℃-360 ℃ maximum combined power F＞56N that plastic-steel combines in metal insert surface temperature between 280 ℃-360 ℃ or in injection moulding process; The metal insert surface temperature remains between 310 ℃-340 ℃, the temperature of PA6T material in the time of 310 ℃-340 ℃, maximum combined power F＞62N that plastic-steel combines.
Claims (7)
1. the moulding process that PA6T combines with metal insert is characterized in that, comprises the steps:
1) before the injection mo(u)lding, metal insert is carried out The pre-heat treatment, make the metal insert surface temperature reach 280 ℃-360 ℃;
2) put into mould to the metal insert after the preheating and carry out injection moulding, the temperature of PA6T material is 280 ℃-360 ℃;
3) pressurize, cooling, the demoulding promptly get.
2. the moulding process that PA6T according to claim 1 combines with metal insert is characterized in that step 2) when carrying out injection moulding, the metal insert surface temperature is 310 ℃-340 ℃, the temperature of PA6T material is 310 ℃-340 ℃.
3. the moulding process that PA6T according to claim 1 combines with metal insert is characterized in that, said metal insert is steel, copper or aluminium.
4. the moulding process that PA6T according to claim 1 combines with metal insert; It is characterized in that; Said The pre-heat treatment is to put into high temperature oven to metal insert to heat; Set and the observed temperature detection through the temperature of high temperature oven, come the metal insert temperature in the baking oven is carried out management and control.
5. the moulding process that PA6T according to claim 1 combines with metal insert; It is characterized in that; When putting into the metal insert after the preheating mould and carry out injection moulding step 2); The metal insert surface temperature sensor interior with being contained in mould carries out the surface and contacts, and monitors the variation of metal insert surface temperature in injection moulding process in real time.
6. the moulding process that PA6T according to claim 1 combines with metal insert is characterized in that, said injection pressure is 60-80MPa
,The pressure of pressurize is 50-70MPa, and the dwell time is 10-15s, and be 25-30s cool time.
7. the moulding process that PA6T according to claim 1 combines with metal insert is characterized in that, finishing back metal insert surface temperature in pressurize is 280 ℃-356 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218054.6A CN102689400B (en) | 2012-06-28 | 2012-06-28 | Forming process for combining PA6T and metal insert |
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| CN201210218054.6A CN102689400B (en) | 2012-06-28 | 2012-06-28 | Forming process for combining PA6T and metal insert |
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| CN102689400B CN102689400B (en) | 2015-03-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107939A (en) * | 1994-07-21 | 1995-09-06 | 武进县五星农机配件有限公司 | Oil tank, gearbox cover, back head and top head for single-cylinder diesel engine |
| EP1342547A1 (en) * | 2002-03-09 | 2003-09-10 | Demag Ergotech GmbH | Check valve |
| CN1469500A (en) * | 2002-07-17 | 2004-01-21 | 山 黄 | Composite leading and collecting plate for fuel cell and its manufacture |
| US20060157891A1 (en) * | 2005-01-14 | 2006-07-20 | Tyco Electronics Corporation | Insert injection-compression molding of polymeric PTC electrical devices |
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2012
- 2012-06-28 CN CN201210218054.6A patent/CN102689400B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107939A (en) * | 1994-07-21 | 1995-09-06 | 武进县五星农机配件有限公司 | Oil tank, gearbox cover, back head and top head for single-cylinder diesel engine |
| EP1342547A1 (en) * | 2002-03-09 | 2003-09-10 | Demag Ergotech GmbH | Check valve |
| CN1469500A (en) * | 2002-07-17 | 2004-01-21 | 山 黄 | Composite leading and collecting plate for fuel cell and its manufacture |
| US20060157891A1 (en) * | 2005-01-14 | 2006-07-20 | Tyco Electronics Corporation | Insert injection-compression molding of polymeric PTC electrical devices |
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| CN102689400B (en) | 2015-03-25 |
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