CN1733448A - Manufacturing technique of brittle fracture preventing plastic rubber shell using PC+ABS as raw material - Google Patents
Manufacturing technique of brittle fracture preventing plastic rubber shell using PC+ABS as raw material Download PDFInfo
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- CN1733448A CN1733448A CN 200410052456 CN200410052456A CN1733448A CN 1733448 A CN1733448 A CN 1733448A CN 200410052456 CN200410052456 CN 200410052456 CN 200410052456 A CN200410052456 A CN 200410052456A CN 1733448 A CN1733448 A CN 1733448A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 74
- 239000002994 raw material Substances 0.000 title claims abstract description 28
- 229920006834 PC+ABS Polymers 0.000 title claims description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 238000000034 method Methods 0.000 title abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000011347 resin Substances 0.000 claims abstract description 18
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- 238000002347 injection Methods 0.000 claims description 36
- 238000001746 injection moulding Methods 0.000 claims description 35
- 238000013461 design Methods 0.000 claims description 20
- 238000005516 engineering process Methods 0.000 claims description 20
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The produce technique for plastic shell of PC and ABS to prevent brittle fracture is characterized in that, when on injecting step, it needs proper temperature and time for resin to prevent resin degradation that should ensure [(B-A)/A]X100%<30% even [(B-A)/A]X100%<15%, wherein, A is the fusion index of raw material and B is the product fusion index, which can prevent material from degradation, change of chain structure and decomposition mechanism. This invention decreases degradation degree and fusion index, and improves the effect of preventing brittle fracture.
Description
Technical field
The present invention relates to a kind of production technology of plastic cement shell, be specifically related to a kind of can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, mainly be suitable for the production of the frequent sophisticated product plastic cement shell that uses such as mobile phone, PDA, palm PC, digital camera.
Background technology
In the prior art, make the mobile phone that is used for of raw material production with PC+ABS, PDA, palm PC, the frequent sophisticated product plastic cement shell that uses such as digital camera, the embrittlement phenomenon appears easily, as mobile phone plastic cement shell, because mobile phone designs very for a short time at present, and handset structure is very complicated, especially be embodied on the clamshell phone, the phenomenon of embrittlement of plastic cement shell or fracture appears in rotating shaft place of clamshell phone and SIM seat place easily, the manufacturer does not have good solution to this, so manufacturer or avoid this difficult problem and do bar phone, or adopt the very expensive PC material of price and do not adopt the relatively cheap PC+ABS material of price.And our present mobile phone plastic cement shell adopts the PC+ABS material more.Therefore require us to address this problem.And adopt the phenomenon of PC+ABS as ubiquity embrittlement of plastic cement shell or fracture, do not have good solution.
The embrittlement of plastic cement shell relates to the problem of many-sided factors such as product design, mould design, Shooting Technique, material melt index, oil spout auxiliary material and oil spout material, is directly connected to the quality and benefits of product.
Summary of the invention
The technical problem to be solved in the present invention is, at the deficiency that above-mentioned prior art exists, provide a kind of can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS.
The technical solution used in the present invention is, a kind of can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, when being included in injection step, suitable resin temperature and resin reasonable time under higher temperature be arranged, prevent the resin degraded, described temperature and time, can guarantee [(B-A) ÷ A] * 100%＜30%, A is the melt index of raw material, and B is the melt index of finished product.Keep [(B-A) ÷ A] * 100%＜15% better.
Above-mentioned can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, during injection moulding, resin material pipe design temperature is, nozzle is 265 ℃～275 ℃, and N1 is 270 ℃～280 ℃, N2 is 265 ℃～275 ℃, N3 is 260 ℃～270 ℃, and the melten gel temperature of plastic cement is controlled in 270 ℃～290 ℃ scopes, and N1 is the temperature of barrel stage casing front end, N2 is the temperature of barrel stage casing mid portion, and N3 is the temperature of rear end, barrel stage casing.。
Injection moulding adds will have suitable resin temperature man-hour, use suitable material pipe design temperature, because it is generally less that mobile phone is moulded the nozzle size of the employed injection machine of shell,, cause material degradation in order to avoid be detained for a long time under the situation of high temperature so design temperature is too not high.When quality problem occurring, for example be not fully filled, shrink etc., when material pipe temperature being increased to the limit, confirm whether material degrades as needs, optimal method is to improve filling capacity by improving mould design.The degraded of process causes chain structure to change to some extent, makes splitting mechanism that part take place and changes.Resin temperature of the present invention and resin be reasonable time under higher temperature, is precondition with assurance [(B-A) ÷ A] * 100%＜30%, thereby the degree of degradation of resin is reduced, and reduces the melt index of plastic cement shell finished product, has improved the effect that prevents embrittlement.
Above-mentioned can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, during injection moulding, keep mold temperature even, the mold cores portion temperature is 70 ℃～80 ℃, 75 ℃ are best; 80 ℃～90 ℃ of mold cavity parts, 85 ℃ best.
Above-mentioned can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, before injection moulding, material is advanced drying, dry temperature is 100 ℃～140 ℃, best 120 ℃; The dry time is 4～8 hours, and is best more than 4 hours.
Above-mentioned can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, during injection moulding, the slow earlier back of injection speed is fast, keep the steady homogeneous of plastic cement to flow, i.e. injection speed V1=30～40mm/ second, V2=55～65mm/ second, V3=40～50mm/ second, described V1 is the injection commencing speed, and V2 is the injection midrange speed, and V3 is the injection final velocity.
Above-mentioned can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, before the injection moulding, with Environmental Chemistry material wiped clean such as the grease that adheres on the mould and lubricating grease.
Above-mentioned can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, during injection moulding, use suitable back pressure and screw speed, screw speed RPM=[60 * preferred outside diameter linear velocity 202.4mm/ second] ÷ [screw diameter * π].
The specific embodiment
A kind of can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, comprise step, when injection moulding, suitable resin temperature and resin reasonable time under higher temperature is arranged, prevent the resin degraded, described temperature and time can guarantee [(B-A) ÷ A] * 100%＜15%, A is the melt index of raw material, and B is the melt index of finished product.Injection moulding adds will have suitable resin temperature man-hour, need suitable material pipe design temperature, nozzle is 265 ℃～275 ℃, N1 is 270 ℃～280 ℃, N2 is 265 ℃～275 ℃, and N3 is 260 ℃～270 ℃, and N1 is the temperature of barrel stage casing front end, N2 is the temperature of barrel stage casing mid portion, and N3 is the temperature of rear end, barrel stage casing.Because it is generally less that mobile phone is moulded the nozzle size of the employed injection machine of shell,, cause material degradation in order to avoid be detained for a long time under the situation of high temperature so design temperature is too not high.When quality problem occurring, for example be not fully filled, shrink etc., when as needs material pipe temperature being increased to the limit, whether the PLSCONFM material degrades, and optimal method is to improve filling capacity by improving mould design.The degraded of process causes chain structure to change to some extent, makes splitting mechanism that part take place and changes.The melten gel temperature of plastic cement is controlled in 270 ℃～290 ℃ scopes preferable.Thereby make [(B-A) ÷ A] * 100%＜15%, A is the melt index of raw material, and B is the melt index of finished product.
Use suitable back pressure and screw speed.Screw speed RPM=[60 * preferred outside diameter linear velocity 202.4mm/ second] ÷ [screw diameter * π].
When the tonnage of injection machine excessive, and working of plastics weight is when kicking the beam, then can cause the phenomenon of low load with strong power to take place, thereby make and accumulate a lot of material in the injection machine, cause plastic cement to be degraded in injection machine gun barrel internal cause overlong time, so cause the melt index of finished product to raise significantly, just can judge from the melt index of finished product and the melt index contrast of raw material, make [(B-A) ÷ A] * 100%＜30%, preferably make [(B-A) ÷ A] * 100%＜15%, when selecting injection machine, the injection amount of supposing each injection moulding is the Y gram, and then selecting the injection amount for use is that the injection machine of 1.5 * Y gram is just passable.
Reasonably mold temperature is set, and improves the residual internal stress of product; The mould temperature is very important to the outward appearance of product; The mould temperature is consistent very important to size Control; The mould temperature can reduce warpage uniformly; Reasonably the mould temperature is 70 ℃～80 ℃ of core parts, 80 ℃～90 ℃ of die cavity parts, can reduce the product internal stress; Reasonably the mould temperature can be improved material flowability, avoids inhomogenous cooling phenomenon to occur.
Use correct condition and equipment that material is carried out drying, and guarantee enough drying times, drying more than 4 hours under 120 ℃ the temperature conditions.If material is oven dry not, during injection moulding, water vapour molecule can play the stress effect in material, thereby has weakened the bond strength of material.
The antirust agent that adheres on the mould is wanted abundant wiped clean, will use the less kind of influence in the time of must using releasing agent.Injection moulding adds avoids adhering to Environmental Chemistry materials such as grease, lubricating grease man-hour as far as possible.
Injection moulding adds the low pressure of trying one's best man-hour and is shaped.Injection pressure is crossed to hang down and can be caused the cavity pressure deficiency, and melt can not be full of die cavity smoothly; Otherwise injection pressure is excessive, not only can cause the goods flash, also can cause product deformation, system overload even; The structure of injection pressure and cast gate, product has bigger relation, and difference is also very big.
The slow earlier back of injection speed is fast, avoids penetrating at a high speed.Note keeping the smooth flow of plastic cement, avoid the heterogeneity flow phenomenon to occur.Issuing velocity (being injection speed): V1=30～40mm/ second, V2=55～65mm/ second, V3=40～50mm/ second, described V1 is the injection commencing speed, and V2 is the injection midrange speed, and V3 is the injection final velocity.
Whether the instrument on the injection machine, instrument can correctly show actual temperature, pressure and other relevant parameter, if regularly do not carry out measurement verification, data presented and real data have bigger difference, also can mislead the operator of injection machine, and the quality guarantee of injection moulding is had harmful effect.The temperature fluctuation of injection moulding processing environment is big, environment is too dirty, light is too dark all can produce harmful effect to the quality guarantee of injection moulding.Whether there is detailed operational procedure to come standard injection moulding processing operation.Operational procedure will quantize, refinement.
The present invention relates to research and analyse method as follows:
1). sample melted index (MI) is measured: if plastic rubber material is degraded in injection machine, the melt index of finished product is significantly raise.Just contrast as can be seen from the melt index of finished product and the melt index of raw material, suppose that A is the melt index of raw material, B is the melt index of finished product, and [(B-A) ÷ A] * 100%＜30% illustrates that Shooting Technique is more normal.The MI assessment of indices adopts GB/T36 82-2000 standard, and test condition is 260 ℃/5000g.
2). mechanical property test: the project that the plastic cement shell is carried out mechanical property test has hot strength, and (unit is: the standard of MPa foundation is: GB1040-92), (unit is: the standard of % foundation is elongation at break: GB1040-92), (unit is: the standard of MPa foundation is bending strength: GB/T9341-2000), (unit is: the standard of MPa foundation is bending modulus: GB/T9341-2000), (unit is: the standard of J/m foundation is impact strength: ASTM256).
3). FFIR (FTIR) is analyzed: their infrared spectrum is compared, under the resolution ratio condition that experiment sets, the distribution situation of the infrared absorption peak of analytic sample, the water content that shows on the spectrogram with certain casing contrasts other samples and analyzes.
4). thermogravimetic analysis (TGA) (TGA): sample is carried out temperature programming under nitrogen atmosphere, measure the weight-loss curve of sample, can obtain the situation of heat endurance, blend ratio and filler of situation, the sample of the moisture and volatile components of sample.
5). differential scanning calorimetry (DSC):
6). pyrolysis gas chromatograph-mass spectrometry analysis: analyzed sample carries out cracking under 590 ℃ of high-pure helium gas shileds, cracked gas is introduced gas chromatography-mass spectrum by special purpose interface separate and identify.Infer that whether may to be the degraded of process cause chain structure to change to some extent, make splitting mechanism that part take place and change.
The embrittlement of plastic cement shell also relates to the problem of many-sided factors such as product design, mould design, oil spout auxiliary material and oil spout material, is directly connected to the quality and benefits of product.
The mechanism that the plastic cement shell produces embrittlement or fracture is as follows:
1). the plastic cement shell is lower at the bond strength at weld bond place, under the cyclic force effect, because the bond strength at weld bond place can't overcome fatigue strength and produce fracture at the weld bond place of plastic cement shell.Mainly show the main frame face-piece and renovate dress rotating shaft place, dig or when closing when renovating, mechanical force acts on the weld bond place of plastic cement shell by rotating shaft, makes the plastic cement shell be easy to generate fracture at the main frame face-piece and the weld bond position of renovating dress rotating shaft place owing to acting on repeatedly for a long time.
2). because wedge angle stress is concentrated, the sharp corner the during demoulding on the plastic cement shell easily is scratched the effect that produces micro-crack, mechanical force, the influence of the principal elements such as corrosiveness of the chemical substance used during the oil spout lacquer, sharp corner on the plastic cement shell (being the place that wedge angle does not fall into fillet) is easy to generate fracture, this kind phenomenon mainly occurs in renovating of mobile phone, and mainly the form with fracture shows.
3). when the wall thickness of plastic cement shell design very thinly (for example during thickness≤0.7mm) since in the injection moulding process because of the very thin thickness of plastic cement shell, cool off easily during injection moulding, thereby cause the bond strength at weld bond place not enough, show as embrittlement.Mainly occur in the place, thin glue position of battery case, main frame drain pan.The wall thickness of plastic cement shell is designed to 1.0～1.5mm the best on the mobile phone.
4). when on the plastic cement shell a lot of hole being arranged, because cool off comparatively fast in many places, hole, hole local weld bond how is also many, and this also is the place that the plastic cement shell is easy to generate embrittlement.Mainly occur in the next door at the porose positions of part such as main frame drain pan, main frame face-piece.
5). when plastic mould adopts the injection moulding of the big mouth of a river, shrink because of plastic cement cools off at place, the big mouth of a river, thereby produce shrinkage stress at place, the big mouth of a river.Also occur in conjunction with imprecise situation (being the shrinkage porosite phenomenon) at place, the big mouth of a river because of the last insufficient material structure that causes of feed supplement.
6). the too high and cracking (also crying degraded) of material overlong time or temperature in injection machine, the mouth of a river material of the material of cracking and doping quadric injection mould all can weaken the bond strength of plastic cement shell at the weld bond place.
7). Environmental Chemistry materials such as the antirust agent that adheres on the injection mold, releasing agent, grease, lubricating grease also can weaken the bond strength of plastic cement shell at the weld bond place.The chemical solvent that adopts during oil spout also has certain influence to weakening the bond strength of plastic cement shell at the weld bond place.ESC is to be in the Environmental Chemistry material to be arranged and exist inner or outside two conditions of stress just are easier to take place when possessing simultaneously, only possesses under the situation of any one of them condition cracking and can delay generation; Therefore, remove wherein any one condition, this cracking just can reduce significantly.Because the polymer molecular chain effect of solvent and frosting layer makes the cohesive energy reduction on top layer,, will produce cracking phenomena when being reduced to bear existing stress again the time; Solvent is darker to the goods infiltration, and it is darker bigger that crackle will become.
Because PC+ABS belongs to the amorphism material, does not have crystalline portion, molecule to be unordered dispersity in the material structure, therefore intermolecular have certain interval to exist.So-called ESC is exactly owing to the Environmental Chemistry material effect of soaking in the molecule gap, the cracking that adhesion causes between the saboteur.Have only one of stress or Environmental Chemistry material then to be difficult to cracking.Just take place easily when having only two conditions to possess simultaneously.
The plastic cement shell produces the analysis of causes and the system scheme of embrittlement or fracture:
1). analyze from material: note control and guarantee each batch plastic material melt index stability and batch with criticize between the stability of product quality.It is better generally the plastic material melt index to be controlled at 6～13g/10min.In the material certificate, indicate the specification requirement of this project of melt index.
2). analyze from product design:
A. fall some R arc fillets, it is concentrated to eliminate stress, and the situation of wedge angle scratch plastic parts occurs in the time of also can eliminating the demoulding.Some R arc fillets also have very big benefit to the flowability that strengthens injection moulding.The R value is got 0.2～0.5mm, and (reason is to concentrate eliminating stress very significantly effect is arranged when the R value is got 0.2～0.5mm with regard to passable, can eliminate stress and concentrate 70%～85%, the flowability of injection moulding can improve 15%～25%, and structural strength can improve 20%～50%); When R value＞0.5mm, concentrate to have certain effect, but effect is not clearly to eliminating stress.
B. design suitable pattern draft, to reduce demoulding stress.Pattern draft is got 1.5 °～3.0 ° better, and pattern draft is the bigger the better certainly, but pattern draft is crossed the performance space that conference influences product-forming.
C. rational structure and thickness, the wall thickness of plastic cement shell is designed to 1.0～1.5mm the best on the mobile phone.Adhere to even principle of wall thickness and slow transition principle.
D. do not design some very high ribs, if rib is very high, plastic cement is filled difficulty when then being prone to injection moulding, and the demoulding is also difficult.Latticed reinforcement height is got 0.8～1.5mm and is got final product, and the product internal side wall is strengthened or the muscle height of location is got 1.0～2.0mm and got final product, and the positioning bar height of parts is got 1.0～3.5mm and got final product on the product, and the width of all ribs is got 0.55～1.0mm and got final product.
E. make structural strength analysis with finite element method.
3). analyze from the mould design:
A. add some slag wells in the place of plastic cement thinner thickness and the position of porous, thereby improve the bond strength at weld bond place.
B. with mold flow analysis software an initial analysis is done in the weld bond position of plastic parts, the position of appropriate design cast gate, quantity and size make the weld bond of plastic parts not be in force part and the thin position of wall thickness.And low pressure is shaped as far as possible, and the mouth of a river (also being cast gate) the small increase of radius just can reduce pressure largely and fall.Reach a conclusion according to experiment: Δ P ≈ [biquadratic of 1 ÷ R] * K (wherein K is a coefficient, and R is for watering port radius) falls in pressure.
C. selecting for use of gate form, important spare part and key components and parts are generally selected a cast gate for use, thereby avoid plastic cement at the big mouth of a river place's cooling shrink, the big mouth of a river can occur in conjunction with imprecise situation (being the shrinkage porosite phenomenon) because of the insufficient material structure that causes of feed supplement at last.
D. the appropriate design of cooling water channel also is helpful to the bond strength that improves plastic parts weld bond place.Adopt the temperature field analysis method to analyze.Rational mould temperature: 70 ℃～80 ℃ of GENERAL TYPE core segments, 80 ℃～90 ℃ of die cavity parts.
E. the good exhaust effect of mould has certain help to the bond strength that improves plastic parts weld bond place.The quick filling of plastic cement also is convenient in good exhaust.The degree of depth of air discharge duct is 0.02～0.04mm, and the width of air discharge duct is 3.00～6.00mm.
F. the reasonable structure of mould has a significant impact the bond strength at plastic parts weld bond place.
G. the hot flow path version of mould especially is very helpful to the bond strength that improves rotating shaft place, porous place and thin-wall part weld bond position.
4). analyze from oil spout:
A. because the water of using before the oil spout of scrounging has in various degree weakening to the bond strength at injecting products weld bond place, strengthen this assessment on the one hand.
B. the paint that is sprayed on the plastic cement shell is also influential to the bond strength at injecting products weld bond place, also will be analyzed the degree of depth of influence.
5). analyze from human factor:
A. dislike trouble during injection moulding, with the remaining sizing material row light in the barrel,, thereby cause the plastic cement shell to produce embrittlement during the beginning injection moulding because more serious degraded takes place remaining sizing material.
B. should strengthen detection, the analysis of sample after Incoming Quality Control and the injection moulding.
C. this is common mistake conscientiously not transfer injection machine or misoperation, should strengthen the drop accumulation of injection moulding experience, and pay attention to the stability and development talent team.
D. mix mouth of a river material injection moulding, the melt index of product is raise a lot, thereby cause the insufficient strength of product, especially the bond strength at product weld bond place can descend significantly, and it is very crisp to show as product.
E. not enough to injection moulding process operation rules implementation dynamics.
Facts have proved: above analytical method is right as rain, and the system scheme of embrittlement of plastic cement shell or fracture is very effective.
Claims (7)
1, a kind of can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, when being included in injection step, suitable resin temperature and resin reasonable time under higher temperature is arranged, prevent the resin degraded, described temperature and time can guarantee [(B-A) ÷ A] * 100%＜30%, A is the melt index of raw material, and B is the melt index of finished product.
2, according to claim 1 described can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, during injection moulding, resin material pipe design temperature is, nozzle is 265 ℃～275 ℃, N1 is 270 ℃～280 ℃, N2 is 265 ℃～275 ℃, N3 is 260 ℃～270 ℃, the melten gel temperature of plastic cement is controlled in 270 ℃～290 ℃ scopes, keeps [(B-A) ÷ A] * 100%＜15%, described N1 is the temperature of barrel stage casing front end, N2 is the temperature of barrel stage casing mid portion, and N3 is the temperature of rear end, barrel stage casing.
3, according to claim 1 described can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that during injection moulding, keep mold temperature even, the mold cores portion temperature is 70 ℃～80 ℃, 80 ℃～90 ℃ of mold cavity parts.
4, according to claim 1,2 or 3 arbitrary described can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that before injection moulding, material is advanced drying, dry temperature is 100 ℃～140 ℃, the dry time is 4～8 hours.
5, according to claim 1,2 or 3 arbitrary described can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, during injection moulding, the slow earlier back of injection speed is fast, keeps the steady homogeneous of plastic cement to flow, it is injection speed V1=30～40mm/ second, V2=55～65mm/ second, V3=40～50mm/ second, described V1 is the injection commencing speed, V2 is the injection midrange speed, and V3 is the injection final velocity.
6, according to claim 1,2 or 3 arbitrary described can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, before the injection moulding, Environmental Chemistry material wiped clean such as the grease that adheres on the mould and lubricating grease.
7, according to claim 1,2 or 3 arbitrary described can prevent embrittlement make the production technology of the plastic cement shell of raw material with PC+ABS, it is characterized in that, during injection moulding, use suitable back pressure and screw speed, screw speed RPM=[60 * preferred outside diameter linear velocity 202.4mm/ second] ÷ [screw diameter * π].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100524569A CN100344437C (en) | 2004-11-24 | 2004-11-24 | Manufacturing technique of brittle fracture preventing plastic rubber shell using PC+ABS as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100524569A CN100344437C (en) | 2004-11-24 | 2004-11-24 | Manufacturing technique of brittle fracture preventing plastic rubber shell using PC+ABS as raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1733448A true CN1733448A (en) | 2006-02-15 |
| CN100344437C CN100344437C (en) | 2007-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100524569A Expired - Fee Related CN100344437C (en) | 2004-11-24 | 2004-11-24 | Manufacturing technique of brittle fracture preventing plastic rubber shell using PC+ABS as raw material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205594A (en) * | 2011-05-11 | 2011-10-05 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
| CN106154005A (en) * | 2015-03-27 | 2016-11-23 | 安徽圣享智能科技有限公司 | A kind of processing technique of electric meter box body |
| CN114103043A (en) * | 2021-10-27 | 2022-03-01 | 东风延锋汽车饰件系统有限公司 | Method for improving performance of TPO injection molding air bag frame hinge |
| CN117841319A (en) * | 2024-03-07 | 2024-04-09 | 南通百扬塑料制品有限公司 | Food-grade PET plastic bottle and tank injection molding control system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW575493B (en) * | 2002-04-01 | 2004-02-11 | Jiann Gwo Plastic Industry Co | Method for producing plastic bottle with mat surface |
| US20040007798A1 (en) * | 2002-04-30 | 2004-01-15 | Kreager Andrew S. | Polymer blends for tip molding process and method of forming a plastic part |
| US6887923B2 (en) * | 2002-12-11 | 2005-05-03 | Equistar Chemicals, L.P. | Processing aids for enhanced machine direction orientation rates and property enhancement of polyolefin films using hydrocarbon waxes |
-
2004
- 2004-11-24 CN CNB2004100524569A patent/CN100344437C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205594A (en) * | 2011-05-11 | 2011-10-05 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
| CN102205594B (en) * | 2011-05-11 | 2014-03-26 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
| CN106154005A (en) * | 2015-03-27 | 2016-11-23 | 安徽圣享智能科技有限公司 | A kind of processing technique of electric meter box body |
| CN114103043A (en) * | 2021-10-27 | 2022-03-01 | 东风延锋汽车饰件系统有限公司 | Method for improving performance of TPO injection molding air bag frame hinge |
| CN117841319A (en) * | 2024-03-07 | 2024-04-09 | 南通百扬塑料制品有限公司 | Food-grade PET plastic bottle and tank injection molding control system |
| CN117841319B (en) * | 2024-03-07 | 2024-05-03 | 南通百扬塑料制品有限公司 | Food-grade PET plastic bottle and tank injection molding control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100344437C (en) | 2007-10-24 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Dongguan Konka Mould Plastic Co., Ltd. Assignor: Konka Group Co., Ltd. Contract fulfillment period: 2007.10.30 to 2012.10.30 contract change Contract record no.: 2009440000042 Denomination of invention: Manufacturing technique of brittle fracture preventing plastic rubber shell using PC+ABS as raw material Granted publication date: 20071024 License type: Exclusive license Record date: 2009.1.9 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.10.30 TO 2012.10.30; CHANGE OF CONTRACT Name of requester: DONGGUAN KANGJIA MODULE PLASTIC CEMENT CO., LTD. Effective date: 20090109 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20131124 |