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发表于 2009-5-18 14:57:21
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配方师面试技术考核
2 P* B m# {* I% GChemist Interview Evaluation Test
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姓名Name: 出生年月 Birth Date:
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现任职位 Position: 联系电话 Phone No.:
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日期Date:
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备注Note;
2 t; B* k7 p6 j. Z: ^/ B1-如果需要,可加附页You may attach additional sheet as necessary: k R% j$ D. f/ O+ I* n
2-如果需要,可做必要的假设 Please make necessary assumptions to answer the questions. , \+ K. k* r; f0 ?2 _
1. 请根据提供的资料,设计一个满足要求的配方Please develop a compound recipe that will meet all the following physical property requirements.+ f9 Z% k% w8 Q4 F; @& O# n5 K
ASTM Specification SAE J200 M4AA717A13B13C12F17
|" e3 o+ j+ M' S' D" m- ~4 IAdditional Information Natural rubber8 f- O- S7 P6 \; Z2 C" S
Test Item Test method Unit Specification , K% H: G: {2 W& @5 @
Hardness ,Shore A ASTM D2240 70±5
6 W( R. Q* z# o2 S) f. ~8 B }- _! sTensile ASTM D412 MPa ≥17; h) j1 T+ b8 n$ r% F6 f+ A
Elongation ASTM D412 % ≥3006 @- p$ G: d8 f2 N+ w' m
Tear Strength,Die C ASTM D624, KN/m /
* Y0 Y# M# [) D, F' hHeat resistance,70 h at 70℃ ASTM D573
$ B$ _, A+ ?0 a; m/ L6 F6 MChange in hardness, MAX points +10, l/ U- b1 O c
Change in tensile strength, MAX % -25
- I( S7 ?0 D+ O4 M I' ^$ fChange in ulimate elongation, MAX % -25( k5 l; W8 h2 \* v! X
Compression Set(70℃x22h) ASTM D395 Method B % ≤25
1 a9 m5 H3 W$ e9 s# Z: z: LResistance to Ozone ASTM D1171
: W9 L6 t+ q2 T, B) xQuality Retention Rating, min, Method B % 857 i n; ?- h* b# N4 {
Low -temperature resistance, ASTM D2137,
5 s. X7 \ m% ~ pNonbrittle after 3 min at -40℃ Method A pass
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Recipe配方:/ \# \) A, P4 Z3 z( H
Item No. Ingredient PHR# G" h5 P' ^6 D- d: d1 F
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2. Please develop a recipe based on the following application requirement.请根据以下顾客要求,设计一个合理的配方。& X' v) M @" T( e1 h* W
顾客要求:抗静电,丁苯胶,黑色,60度(Low Static, SBR, Black, 60 shore A)& n' ~6 q! u$ V7 e
配方Recipe:
3 `3 q* J6 l2 A: R# S! c/ @Item No. Ingredient PHR% K. d1 O: U0 y0 z/ I- b
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3. 我们有一个NBR配方和顾客要求如下,请判断该配方是否能够满足顾客要求,如果不能,请修改配方Please tell if the following recipe can meet the customer’s requirements,if not, please modify the recipe to meet the specification requirements.
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/ j3 [# }9 r9 N4 e原始配方Original Recipe 改进配方Improved Recipe. t) f( i' S1 A
Item No. Ingredients PHR (180.3)
( n4 J! E1 M" [5 e, i+ r1 230S NBR 100 / d/ x9 A9 [1 K, h+ J
2 4010NA 1 ( E: q1 u6 z/ ?5 l, v6 T
3 RD 1
+ ?, R, R1 ?% \/ m4 Zinc Oxide 5 . |, x' h, G/ m+ J. R
5 Stearic Acid 1 & b+ J8 s9 a0 |; G( q9 T/ R4 b
6 Paraffin Wax 1 " o- K$ \8 b6 K8 J/ x
7 N330 23
3 d6 B) @0 |- R y# O8 N770 40 # V8 X$ w H, Z# |
9 DOP 5
( U" L. b( |% J0 w, |- h10 TMTM 0.3 ; ]' T9 {) x: Y2 n$ p6 ~2 W+ v4 v
11 CBS 1.5 " `8 j. m3 m& _4 E: w8 K+ H
12 Sulfur 1.5 ; h1 ]4 C" n! Z Y) |, {
4 k/ q+ u! @4 j% q6 h顾客的要求如下Customer’s requirements is as follows:
6 i% J3 A& i; V7 OTest Item Test method Unit Specification
7 p' @) `8 G( a+ BHardness ,Shore A ASTM D2240 70±5
/ V: t2 E8 K- P/ z# u( {3 nTensile Strength, ASTM D412 MPa ≥141 c: }1 K' Y+ M" `7 B* v/ U
Elongation ASTM D412 % ≥250
; {* B) B) p4 e% k" uTear Strength,Die C ASTM D624, KN/m /% X* k' P5 K; ]
Heat resistance,70 h at 125℃ ASTM D865 * f. C0 f W, N
Change in hardness, MAX points 0~+15, A; X) J3 _" }3 Q- F' Z! O1 p
Change in tensile strength, MAX % -25( N0 l B0 i. P0 ?$ Y+ c2 I7 @) Q
Change in elongation, MAX % -50" _. n. H8 d- x4 M6 `7 K6 p
Compression Set(150℃x22h) ,ASTM D395 Method B % ≤30
9 e* m3 g- I4 b% H4 FFluid resistance,No.IRM903 Oil,150℃,70 HOURS ASTM D471
# y. i. X) u) A: q$ cChange in hardness, ASTM D2240 Point -10$ i5 K) x$ D, U- k2 h9 `* X
Change in tensile strength, MAX ASTM D412 % -35
- _1 d/ X2 I/ X0 V2 D/ u9 cChange in elongation, MAX ASTM D412 % -35* l3 r1 S- y" b* K! x Y
Volume change ASTM D471 % -0~25
# h! g+ c; o7 i- X# a3 wLow temperature TR-10Max ASTM D1329-02 ℃ -20
" }+ `' h ^4 ^' p8 |" Y% jLow temperature -35℃@5hrs.180。 No cracks
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8 T( F: E7 S- A& k8 d4. 下面是一个EPDM配方,在硫化后出模时,制品容易撕裂且不易脱模,如何改进?The parts is easy to tear and difficult to be removed after molding, please solve the problems by modifying the recipe provided.
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Item No. Ingredients PHR (238)
+ d* k, r* Q& c5 V& i1 EPDM4045 100
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# s! B& e" b; g7 p# U4 l- |3 Zinc Oxide 5
8 C8 [# c- S8 G, z6 w3 N4 Stearic Acid 0.5
3 m- a4 H) B# m0 p" L) V6 M" X. e. e5 N770 80
' p% h l) H# Z8 I6 2280 5
& D' f2 A* j6 u- v" r6 l7 TAIC 1.5
5 I }- x3 c4 ?! {9 _* Q8 DCP 6 9 n; L- `6 p' H& o
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5.为了保证配方价格合理而且满足物性,重复性和工艺要求,请列出合理的配方开发步骤.Please list the compound development procedure to ensure the compound cost is reasonable and the compound meet all physical properties, repeatability and processing requirements. / ^2 u# y! @: X( ^
工艺设计师面试技术考核% D" z9 F% Z& X9 }
Processing Engineer Evaluation Test$ p" h5 |8 M$ n5 w
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姓名Name: 出生年月 Birth Date:
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日期Date:
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- `. d1 H5 X* g! d& R备注Note;0 ^' R5 b; G" ^$ Z/ h# z
1-如果需要,可加附页You may attach additional sheet as necessary
$ J* A6 ~* l0 q- U2-如果需要,可做必要的假设 Please make necessary assumptions to answer the questions.
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* k$ j! {- C$ G% ^2 X0 |1)你以前用过哪几种压机,说明压机的特性和能力. What type of presses have you used in the past; describe the specific features / capabilities.
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/ r; x M- v6 F' g% g2)工艺工程师应如何参与新模具的设计和加工?新模具进厂后如何建立稳定的生产工艺? How do the process engineer participate the design and manufacturing of the tool? How to set up the stable process with new tools.
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4 Q, s. U2 \; k3)请画一个草图举例说明你以前是如何通过修改模具改善成型工艺的.Please draw a simple sketch of a tool revision where you made a suggestion to make the molding process better?& Y8 A4 R" v8 W0 F: y& _
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$ _7 V: m; a" H. M4 u1 k4)作为一个工艺工程师,请提出一个新模具预防性维护的方案As a process engineer, what are your recommendations for developing a solid preventive maintenance program on new tools?+ y. R% H9 \: G8 D& O9 X
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5)请列出解决下列生产问题的步骤和方法Describe your process for trouble shooting the following production problems:% b$ A, B' S3 u
a) Non-fill缺料 P( Y0 M& |. p* `
b) Porosity气孔,海绵状5 I3 z2 o6 \; v, ~! c8 e
c) Blister包风或窝气
$ V5 Z) f. r# {; o1 {' G4 zd) Back-grind焦边
1 M1 O' O; R3 \8 `e) Split裂缝
2 K% l- W9 q1 Z6 sf) Tear撕裂2 B. E. s& K+ S5 s, {
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6)请详细说明如何解决胶料在压模中流动不好的问题Explain step by step how you would go about solving a material problem on the factory floor when the compound is not flowing well in a compression tool?
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# X, U- [/ q, U7)请说明你曾经做过的车间规划布局,请说明你在车间布局方面主要做了哪些工作,结果如何Describe a work cell environment you created; please explain your specific involvement and document the results.. }* T! E) [' Z t1 F2 x8 M" {
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* O, }3 w0 n/ l0 o3 ?8)常用的修边方法有几种?各种修边方法适用于哪几种场合?请对每种修边方法给出一个实例。What trimming methods are there? What application for each trimming method? Please give some examples for each trimming method.
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' C4 i7 F) T( q% N, b# p9)请介绍一下硫化曲线MDR,说明如何用硫化曲线确定初始工艺或者调工艺,请举例说明.Explain a MDR curve and how it can benefit you when starting up a new or existing process? Please be detailed and give specific examples.! `! z7 `2 i, n w2 I0 I s. F
并说明如何应用硫化曲线提高生产效率?+ c# r: m3 D }" a* u% J
And explain how to increase the efficiency of the molding by the curing curve.( M5 R( d, _% ]+ T! X% h2 |" R% N
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10)根据模具结构分,产品尺寸包括哪几类?多腔模具产品尺寸出现不合格,如何分析解决?What kinds of dimensions of the parts are divided into according to the tool configure? How to analyze and resolve the dimension problems for the tool with many cavities?
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& K/ V% z$ P& r; p0 b11) 金属和橡胶粘合的基本原理是什么?如何分析解决生产中出现的脱胶问题?
7 Z5 c% P, V% c4 E( TWhat is the principle of the adhensive between the insert and compound? How to solve the separation between the insert and compound?: F7 o/ a/ m6 D% X+ G
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/ e5 J! h7 k8 V6 w+ s! B12)假如有一个新产品需要做生产准备,计划产量每年600万件,模具64腔,尺寸600*600,硫化温度是180度,硫化时间300秒,采用工具自动装料和自动脱模的工艺生产,硫化设备采用抽真空350T平板硫化机,请按照APQP要求做一个完整的生产准备计划。
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13)有一个产品(A18989-01)的模具结构如图所示,硫化体系采用过氧化物硫化体系,硫化温度是180度,时间300秒,手工脱模,脱模时在点A处产品容易撕裂,请分析一下产生撕裂的原因,并提出改进方案。
* D. p- V# I$ k3 s2 j. ^' H' J% ?2 _The tool configure (18989-01) of a part is as following ,the curing agent is peroxide, the parts are easily torn at the corner(A), please analyze the potential reasons and give your improvement plan |
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