Requirements for dimensional type repair
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Requirements for dimensional type repair

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Requirements for dimensional type repair

Requirements for dimensional type repair

Poor size of type repair:

1.Confirm the relationship between the size modification method and the mold core

(for example)


2.Confirm the difference between the specification value and the trimming method

(for example: the measured part size is 51.21, the part specification is 51.25 ± 0.05, and the difference with the specification value is 0.04)

3.Before the size modification of gold mould without drawing, it is necessary to measure and record the relevant size of mould core, and keep the report for tracking and comparison after the size modification

4.Make sure that the size of the existing die is consistent with the size of the drawing before the size modification of the metal mold with the drawing, and make a record after measurement

5.It is necessary to measure and make records after the completion of the pattern repair and compare the records made before the pattern repair to confirm whether the pattern repair is in place

6.In the case of type trimming, it is necessary to consider whether the dimension method connected with the difference will be affected and confirm the relevant edge dimension value (for example)

7.The dimension method of type repair should be considered in the direction of type repair

1. When type repair products have a hole diameter, the hole diameter shall be repaired to the upper and middle limit

2. When a column diameter of the type repair product is one, the column diameter shall be repaired to the lower and middle limit

(for example)

8.The factors that affect the bad size method

1. The product has a drape

2. Deformation of products

3. Wrong measurement method

4. Improper adjustment

5. Special abnormality of gold type

9.A brief introduction to the properties of plastics

(for example)

塑膠材料的固態性質表
分    類番 號略 號樹  脂 名機    械   特   性比重熱    特    性成形特性特長用        途番 號
抗拉強度(kgf/cm2)衝擊強度(kgf.cm/cm2)硬  度耐熱溫度    (連續)熱變形溫度(18.6kgf/cm)(℃)射出壓力金型溫度通氣孔適深度收縮率シソンダ溫度
ASTM D638.D651ASTM D256ASTM D785ASTM D792(℃)ASTM D648(kgf/cm2)(℃)(mm)(%)(℃)
熱塑性通用塑料結晶性1PP聚丙烯300~3902~6.4     (23℃)R85~1100.90~0.91121~6057~64700~140040~600.01~0.021~2.5205~288耐竹擊性一般家電用品.汽車零件.工業零件.餐具1
2LDPE高壓聚乙烯80~160不折斷D41~460.91~0.9382~10032~41560~210020~600.021.5~5149~371耐裂性.柔軟性.反光性密封容器蓋.瓶.軟管容器.絞鏈.合藥用品餐具2
3HDPE低壓聚乙烯220~39086D60~700.94~0.9712143~49700~140010~600.022~5149~316耐裂性.反光性.耐衝擊性洗滌劑容器.藥品罐.煤油罐.瓶子3
非晶性4PS聚苯乙烯350~4801.1~1.7M65~801.04~1.0966~76<104700~210020~600.020.2~0.6163~316透明性.耐竹擊性電氣器具.汽車零.件栗貨.文具4
5ABS丙烯脯-丁二烯-苯乙烯(耐熱用)490~56010.9~21.8     (23℃)R110~1151.0~1.0888~110114~118560~175050~600.030.3~0.8260~288機械性性質耐樂品性電氣器具.汽車外裝品.雜.文具.餐具5
6ABS丙烯脯-丁二烯-苯(耐竹擊用)350~42027.3~43.7     (23℃)R100~1051.02~1.0477~99102~103560~175060~800.030.3~0.8193~274耐熱性.耐樂品性弱電零件.電氣器具.汽車內裝品.餐具6
7AS(SAN)丙烯脯-丁二烯-苯乙烯665~8401.9~2.7M80~901.08~1.160~9688~102700~231050~700.030.2~0.7191~316授明性.機械性性質電氣器具.汽車零件.雜貨.餐具7
8PMMA聚甲基丙烯酸甲脂350~6302.7~24.6R99~1201.08~1.1871~8574~102700~140040~70
0.4~0.8204~254授明性.耐候性防風玻璃.看.板照明器具.家電用品8
9PVC聚氯乙烯480~5501.7~8.6D65~851.35~1.4566~7954~80700~280010~60
0.1~0.5170~210透明性.無毒耐候性.耐熱絕緣建材.瓶子.雜貨.膠片.管子.電線包覆皮9
通用工程塑料結晶性10PA聚烯烯胺(尼能6)490~8404.3~24R100~1201.12~1.1479~11866~80700~175060~800.01~0.030.6~1.4227~316耐摩損性.潤滑性精密機械件(培林.齒輪.軸承)拉鍊.電氣器具.雜貨10
11PA聚烯烯胺(尼能66)630~8405.5~10.9R108~1201.13~1.1582~14966~86700~175060~800.01~0.031.5271~381耐摩損性.耐衝擊性.潤滑性精密機械件(培林.齒輪.軸承)拉鍊.電氣器具.雜貨11
12POM聚縮醛700~8407.6M94(R120)1.4285124700~1400950.012~2.5193~243耐熱性.尺寸穩定性.耐摩損性.耐勞強度高精密機械件(培林.齒輪.軸承)拉鍊.電氣器具.雜貨12
13POM聚縮醛(玻璃207)595~7704.4M75~901.5485~104157~174700~1400950.030.2~1.8176~249耐熱性.尺寸穩定性.剛性.耐勞強度高精密機械件(培林.齒輪.軸承)拉鍊.電氣器具.雜貨13
14PBT聚丁烯對酉太酸6204R1191.3160400~1200~800.005~0.0152210~250反光性.耐摩損性彈簧性精密機零件(鍵開關)汽車柃件14
15PBT聚丁烯對酉太酸(玻璃30%)11707R1201.63200600~1400~1000.005~0.0150.3230~260尺寸穩定性難燃性.耐樂品性弱電零 件(連接器.馬達件)15
非晶性16PC聚碳酸脂560~67030~100R1151.2121130~138700~140090~1100.010.5~0.7274~331壓熱性.耐衝擊性剛性.透明性電機器具.照明器具.精密機械零件.醫器具.保安用具.光學零件.餐具16
17變性PPO變性聚苯醚7708.2~10.4R118~1201.061911050~1400
0.02~0.040.7288~338耐熱性.電氣特性機械性性質精密零件.電氣.電子器具17
特殊工程塑料結晶性18PET聚對苯二甲酸脂(玻璃45%)193012.8R1201.6914022690095
0.2~0.8293~310耐熱性.機械性性質.反光性電子器具.家電器具.汽車零件18
19PPS聚苯硫醚13707R1231.6220~240>260640120~130
0.2290~310耐熱性.難燃性.耐樂品性.機械性性質機械零件.電氣.電子零件.化學裝置零件19
非晶性20PSU聚酉風7147.1M69.R1201.24121~1741811050~1400110~130
0.7343~399耐熱性.機械性性質機械零件.電氣.電子零件.化學裝置零件20
熱硬化性21EP環氧(低密度)176~2810.82~1.36
0.75~1.0
11~1397~105139~167
0.6~1.060~90耐溫性.耐樂品性.電氣特性電氣.電子零件.汽車零件21
22PF苯酚(木粉及綿悄填充)352~6331.31~3.27M100~1151.34~1.45167~94167~206700~1410183~222
0.4~0.970~90耐熱性.難燃性家電熱器具.電氣.電子零件.汽車零件.餐具.22
23MF三聚氰胺(a纖維素填充)492~9141.31~1.91M115~1251.47~1.52117144~1611050~1410161~189
0.5~1.570~100高強度.難燃性餐具.家電熱器具.電氣零件23
24UF尿素(a纖維素填充)387~9141.36~2.18M110~1201.47~1.5294.5144~1611050~1410161~178
0.6~1.450~140耐熱性.機性性質電氣零件.機械零件.餐具24
25UP不飽合聚脂(低收縮)316~141013.6~81.640~701.6~2.4167
~2000150~183
0.0125~50耐熱性.機性性質電氣零件.汽車零件.耐熱零件25


The appropriate processing technology should be selected for the pattern repair method

Grinding machine: the highest precision, the fastest processing efficiency (without polishing)

CNC milling machine: high machining accuracy, high efficiency (no need to polish)

Wire cutting, discharge: same as EDM, machining surface

There is spark pattern, and the side of discharge plate shall be considered in the dimension repair method

(spark pattern on slightly polished surface is required)


plastic injection moulding

Dongguan JiangZhi Electronic Technology Co., Ltd.  offer you a full range of plastic injection moulding services from design to injection moulding production and assembly plastic parts.
 Contact Us
+86 - 0769-81582899

Jerry@jiangzhimy.com
 

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