CN102689395A - Molding technology combining PA11 with metal embedding pieces - Google Patents
Molding technology combining PA11 with metal embedding pieces Download PDFInfo
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- CN102689395A CN102689395A CN2012102179036A CN201210217903A CN102689395A CN 102689395 A CN102689395 A CN 102689395A CN 2012102179036 A CN2012102179036 A CN 2012102179036A CN 201210217903 A CN201210217903 A CN 201210217903A CN 102689395 A CN102689395 A CN 102689395A
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Abstract
The invention discloses a molding technology combining (polyamide11) PA11 with metal embedding pieces, which comprises the following steps: (1) before injection molding, pre-heating the metal embedding pieces to enable surface temperature of the metal embedding pieces to be 185 DEG C to 340 DEG C; (2) putting the pre-heated metal embedding pieces into molds for injection molding, wherein the temperature of PA11 materials is 185 DEG C to 340 DEG C; and (3) pressurizing, cooling and de-molding, thus obtaining end products.. The molding technology combining PA11 with metal embedding pieces resolves the problems that after plastic-steel combined pieces are molded, metal embedded pieces and molded pieces are easy to fall off due to overlarge internal stress generated around the metal embedded pieces during molding.
Description
Technical field
The invention belongs to the functional high molecule material technical field, be specifically related to the moulding process that a kind of PA11 combines with metal insert.
Background technology
PA11 has another name called nylon 11, and formal name used at school is a nylon 11, has advantages such as water absorption rate is low, oil resistivity good, low temperature resistant, easy processing, but is widely used in the manufacturing of mechanical structure parts and maintenance parts.
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 PA11 is studied, and sums up a kind of technological standards of PA11 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 PA11 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 PA11 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 185 ℃-340 ℃;
2) put into mould to the metal insert after the preheating and carry out injection moulding, the temperature of PA11 material is 185 ℃-340 ℃;
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 40-60 MPa, and the dwell time is 10-15s, and be 25-30s cool time.Finishing back metal insert surface temperature in pressurize is 185 ℃-332 ℃.
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 185 ℃-340 ℃, preferred 260 ℃-300 ℃; When the metal insert after the preheating is put into mould and is carried out injection moulding; The temperature of PA11 material is 185 ℃-340 ℃; Preferred 260 ℃-300 ℃; 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 PA11 material when combining with metal insert; The surface temperature of metal insert is controlled between 185 ℃-340 ℃ all the time; The temperature of PA11 material is in the time of 185 ℃-340 ℃, 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 25mm, highly is 75mm, and the peripheral radius R of plastic is 48mm, highly is 40mm.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 PA11 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 PA11 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 | 300 | Q=160 | P Annotate=70, P Protect=58, S Protect= 12, S Cold=26 | ?F=8 |
| Comparative Examples 2 | Q=100 | 270 | Q=179 | P Annotate=70, P Protect=58, S Protect= 12, S Cold=26 | F=10 |
| Comparative Examples 3 | Q=160 | 280 | Q=217 | P Annotate=70, P Protect=58, S Protect= 12, S Cold=26 | F=18 |
| Comparative Examples 4 | Q=180 | 300 | Q=238 | P Annotate=70, P Protect=58, S Protect= 12, S Cold=26 | F=28 |
| Comparative Examples 5 | Q=370 | 350 | Q=355 | P Annotate=70, P Protect=55, S Protect=12, S Cold=30 | F=18 |
| Comparative Examples 6 | Q=380 | 360 | Q=365 | P Annotate=70, P Protect=55, S Protect=12, S Cold=30 | F=12 |
| Comparative Examples 7 | Q=370 | 330 | Q=346 | P Annotate=70, P Protect=50, S Protect= 12 ,S Cold=30 | F=29 |
| Comparative Examples 8 | Q=390 | 290 | Q=338 | P Annotate=70, P Protect=50, S Protect= 12 ,S Cold=30 | F=15 |
| Embodiment 1 | Q=185 | 290 | Q=235 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=33 |
| Embodiment 2 | Q=340 | 330 | Q=332 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=35 |
| Embodiment 3 | Q=330 | 185 | Q=257 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=36 |
| Embodiment 4 | Q=280 | 340 | Q=310 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=31 |
| Embodiment 5 | Q=200 | 210 | Q=203 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=32 |
| Embodiment 6 | Q=220 | 230 | Q=226 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=35 |
| Embodiment 7 | Q=240 | 250 | Q=243 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=36 |
| Embodiment 8 | Q=260 | 270 | Q=262 | P Annotate=70, P Protect=58, S Protect= 11 ,S Cold=29 | F=38 |
| Embodiment 8 | Q=270 | 260 | Q=265 | P Annotate=70 P Protect=58, S Protect= 12, S Cold=27 | F=36 |
| Embodiment 9 | Q=280 | 280 | Q=276 | P Annotate=70 P Protect=58, S Protect= 12, S Cold=27 | F=42 |
| Embodiment 10 | Q=300 | 300 | Q=296 | P Annotate=70 P Protect=58, S Protect= 12, S Cold=27 | F=39 |
Result by the foregoing description and Comparative Examples can find out; When PA11 combines with metal insert; When the metal insert surface temperature finally reaches between 185 ℃-340 ℃ in metal insert surface temperature between 185 ℃-340 ℃ or in injection moulding process, maximum combined power F＞31N that plastic-steel combines; The metal insert surface temperature remains between 260 ℃-300 ℃, the temperature of PA11 material in the time of 260 ℃-300 ℃, maximum combined power F＞35N that plastic-steel combines.
Claims (7)
1. the moulding process that PA11 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 185 ℃-340 ℃;
2) put into mould to the metal insert after the preheating and carry out injection moulding, the temperature of PA11 material is 185 ℃-340 ℃;
3) pressurize, cooling, the demoulding promptly get.
2. the moulding process that PA11 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 260 ℃-300 ℃, the temperature of PA11 material is 260 ℃-300 ℃.
3. the moulding process that PA11 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 PA11 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 PA11 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 PA11 according to claim 1 combines with metal insert is characterized in that, said injection pressure is 60-80MPa
,The pressure of pressurize is 40-60 MPa, and the dwell time is 10-15s, and be 25-30s cool time.
7. the moulding process that PA11 according to claim 1 combines with metal insert is characterized in that, finishing back metal insert surface temperature in pressurize is 185 ℃-332 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210217903.6A CN102689395B (en) | 2012-06-28 | 2012-06-28 | Molding technology combining PA11 with metal embedding pieces |
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| CN201210217903.6A CN102689395B (en) | 2012-06-28 | 2012-06-28 | Molding technology combining PA11 with metal embedding pieces |
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| CN102689395A true CN102689395A (en) | 2012-09-26 |
| CN102689395B CN102689395B (en) | 2015-06-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918505A (en) * | 2015-12-28 | 2017-07-04 | 小米科技有限责任公司 | The method tested the device of mechanical property and Mechanics Performance Testing is carried out to it |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55156037A (en) * | 1979-05-23 | 1980-12-04 | Meiwa Sangyo Kk | Manufacture of plastic molded article with spongy skin material attached |
| JPH11115013A (en) * | 1997-10-17 | 1999-04-27 | Tohoku Munekata Co Ltd | Plastic injection molding method |
| US6471276B1 (en) * | 2000-02-04 | 2002-10-29 | Universal Trim, Inc. | Molded insert netted map pocket |
| CN102229129A (en) * | 2011-02-23 | 2011-11-02 | 江苏大学 | Insert reinforced nylon pipe pliers and manufacturing method |
-
2012
- 2012-06-28 CN CN201210217903.6A patent/CN102689395B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55156037A (en) * | 1979-05-23 | 1980-12-04 | Meiwa Sangyo Kk | Manufacture of plastic molded article with spongy skin material attached |
| JPH11115013A (en) * | 1997-10-17 | 1999-04-27 | Tohoku Munekata Co Ltd | Plastic injection molding method |
| US6471276B1 (en) * | 2000-02-04 | 2002-10-29 | Universal Trim, Inc. | Molded insert netted map pocket |
| CN102229129A (en) * | 2011-02-23 | 2011-11-02 | 江苏大学 | Insert reinforced nylon pipe pliers and manufacturing method |
Non-Patent Citations (2)
| Title |
|---|
| 孙立新，张昌松: "《塑料成型基础及成型工艺》", 29 February 2012, article "嵌件的预热", pages: 168 * |
| 杨鸣波，唐志玉: "《中国材料工程大典第6卷 高分子材料工程（上）》", 31 March 2006, article "工程塑料", pages: 207 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918505A (en) * | 2015-12-28 | 2017-07-04 | 小米科技有限责任公司 | The method tested the device of mechanical property and Mechanics Performance Testing is carried out to it |
| CN106918505B (en) * | 2015-12-28 | 2020-06-02 | 小米科技有限责任公司 | Device for testing mechanical property and method for testing mechanical property of device |
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| CN102689395B (en) | 2015-06-03 |
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