array(3) { ["data"] => array(20) { [0] => array(11) { ["tagname"] => string(5) "pp管" ["inlink"] => int(0) ["addtime"] => string(10) "1594372150" ["tagid"] => int(568330) ["id"] => string(6) "568330" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503929702088723) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/568330" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/568330" } [1] => array(11) { ["tagname"] => string(11) "铝塑pp管" ["inlink"] => int(0) ["addtime"] => string(10) "1593421715" ["tagid"] => int(43708) ["id"] => string(5) "43708" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503910002491399) ["pageurl"] => string(34) "//www.sheji456.com/ask/tlist/43708" ["m_pageurl"] => string(32) "//m.sheji456.com/ask/tlist/43708" } [2] => array(11) { ["tagname"] => string(11) "pp厚壁管" ["inlink"] => int(0) ["addtime"] => string(10) "1598923166" ["tagid"] => int(831608) ["id"] => string(6) "831608" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503938339209232) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/831608" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/831608" } [3] => array(11) { ["tagname"] => string(11) "pp管价格" ["inlink"] => int(0) ["addtime"] => string(10) "1594371757" ["tagid"] => int(520361) ["id"] => string(6) "520361" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503928326356993) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/520361" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/520361" } [4] => array(11) { ["tagname"] => string(11) "pp管规格" ["inlink"] => int(0) ["addtime"] => string(10) "1594371757" ["tagid"] => int(521124) ["id"] => string(6) "521124" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503928347328515) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/521124" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/521124" } [5] => array(11) { ["tagname"] => string(7) "pp-r管" ["inlink"] => int(0) ["addtime"] => string(10) "1594371757" ["tagid"] => int(520228) ["id"] => string(6) "520228" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503928322162706) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/520228" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/520228" } [6] => array(11) { ["tagname"] => string(23) "pp管和ppr管的区别" ["inlink"] => int(0) ["addtime"] => string(10) "1598842477" ["tagid"] => int(801650) ["id"] => string(6) "801650" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503937391296531) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/801650" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/801650" } [7] => array(11) { ["tagname"] => string(13) "pp-r管价格" 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=> int(0) ["status"] => int(99) ["_version_"] => int(1703504102099517476) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/5627284" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/5627284" } [10] => array(11) { ["tagname"] => string(19) "PP-R精品家装管" ["inlink"] => int(0) ["addtime"] => string(10) "1601458616" ["tagid"] => int(2395428) ["id"] => string(7) "2395428" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503993237405700) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/2395428" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/2395428" } [11] => array(11) { ["tagname"] => string(23) "PP管材用途有哪些" ["inlink"] => int(0) ["addtime"] => string(10) "1600842360" ["tagid"] => int(1823554) ["id"] => string(7) "1823554" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503974447972355) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/1823554" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/1823554" } [12] => array(11) { ["tagname"] => string(26) "pp管是用来做什么的" ["inlink"] => int(0) ["addtime"] => string(10) "1600842714" ["tagid"] => int(1876153) ["id"] => string(7) "1876153" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503976051245088) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/1876153" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/1876153" } [13] => array(11) { ["tagname"] => string(29) "pp发泡板材优点有哪些" ["inlink"] => int(0) ["addtime"] => string(10) "1600842360" ["tagid"] => int(1830784) ["id"] => string(7) "1830784" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503974676561926) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/1830784" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/1830784" } [14] => array(11) { ["tagname"] => string(49) "天力pp-r管价格谁了解？质量怎么样？" ["inlink"] => int(0) ["addtime"] => string(10) "1608597460" ["tagid"] => int(7601421) ["id"] => string(7) "7601421" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703504169185312772) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/7601421" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/7601421" } [15] => array(11) { ["tagname"] => string(8) "pp水槽" ["inlink"] => int(0) ["addtime"] => string(10) "1593420953" ["tagid"] => int(23570) ["id"] => string(5) "23570" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503909373345825) ["pageurl"] => string(34) "//www.sheji456.com/ask/tlist/23570" ["m_pageurl"] => string(32) "//m.sheji456.com/ask/tlist/23570" } [16] => array(11) { ["tagname"] => string(8) "pp材料" ["inlink"] => int(0) ["addtime"] => string(10) "1594371757" ["tagid"] => int(520436) ["id"] => string(6) "520436" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) 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[19] => array(11) { ["tagname"] => string(5) "pp板" ["inlink"] => int(0) ["addtime"] => string(10) "1594371757" ["tagid"] => int(521437) ["id"] => string(6) "521437" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503928355717133) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/521437" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/521437" } } ["counts"] => int(67145) ["pagecount"] => float(3358) }

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pp管挤出成型工艺流程有哪些

pp管挤出成型工艺流程有哪些

浏览：39次 | 提问时间： 08-01 05:31

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你是深巷里透进的阳光√ 08-01 05:32

挤出机可周期性重复生产中空制品,如瓶、桶等中空容器.塑料制品特点如下.①有较好的绝缘性、绝热性和隔音性.②塑料制品耐*、碱,抗腐蚀.③塑料制品一般都比较轻,密度略大于水的密度；而聚乙*和聚丙*的密度比水小.④有些塑料制品的透明性极好,在特殊场合可替代易碎的玻璃.⑤在机械设备中塑料零件,如轴承、齿*,工作时能降低噪声,而且不传导热量并耐磨.塑料成型制品的方法：一般热塑性塑料可采用挤出机设备挤出成型、*塑成型、中空成型,采用压延机设备压延成型、采用挤出机设备进行挤出成型,采用流延机进行流延成膜,另外,还可以进行发泡成型,热成型和真空成型等二次成型,热固性塑料采用模压、层压、传递模塑、反应注射成型和浇铸法成型原料干燥,成型,制品定型与冷却,制品的牵引与卷取（或切割）,制品后处理有料筒温度（即塑料温度）螺杆温度。一般控制料筒温度。温度由热电偶测量反馈到加热冷却系统，进行反馈控制。由于螺杆转速变化等原因使挤出物料温度在径向和轴向都存在波动，使用时也需进行控制和调节

人渣太多 08-01 05:40

君心今何在 08-01 05:48

1．原材料的预处理
2．温度控制
3．压力控制
4．真空定型
5．冷却
6．螺杆转速与挤出速度
7．牵引速度
8．管材的在线质量控制与后处理
希望我的回答能帮助你

他如光 08-01 05:57

别掉不该掉的泪 08-01 06:05

聚丙*管（PP－R管）生产工艺摘要：三型聚丙*管具有节能，耐腐蚀，不结垢、卫生，无毒，耐热、耐压，使用寿命长，质轻高强，流体阻力小等优点，是替代镀锌钢管的新一代产品。介绍PP－R管的特点，原料生产工艺，国内现状、施工方法、项目投资估算及市场前景分析。1前言 80年代以前，我国的住宅及公共建筑的上水管基本上是镀锌钢管，由于受材质自身的局限，镀锌钢管存在使用寿命短、易造成水质二次污染等缺点。为了保障人们日常饮用水的质量，我国部分地区，如上海、浙江、河北、江苏等省市已先后提出淘汰镀锌钢管，用高质量的塑料管代替。目前，在我国已相继开发了PVC管、PE管、铝塑复合管、玻璃钢管、钢塑复合管和PP－R管等一批塑料管材，并取得了一定的市场占有率。　　PP－R管是欧洲90年代开发的，以新型无规聚丙*为原料，经挤出成型制作的塑料管材。由于其优越的性能，正日益受到人们的青睐。 2PP－R管的主要性能聚丙*管分为均聚聚丙*（PP－H）、嵌段共聚聚丙*（PP－B）和无规聚丙*（PP－R）3种。PP－H、PP－B、PP－R管材的刚度依次递减，而抗冲击强度则依次增加。给水用聚丙*管是用特殊的PP－R制成。PP－R管作为一种新型的管材，具有以下性能特点：2．1节能PP－R管的生产能耗仅为钢管的20％，并且其导热系数低［0．2W／（m.K）］，也仅为钢管的1／200，应用于热水系统将大大减少热量损失。2．2耐腐蚀、不结垢、卫生、无毒使用PP－R管可免去使用镀锌钢管所造成的内壁结垢、生锈而引起的水质“二次污染”。由于PP－R组份单纯，基本成份为碳和氢，符合食品卫生规定，无毒，更适合于饮用水输送。2．3耐热、耐压、使用寿命长PP－R管的长期使用温度达95℃，短期使用温度可达120℃。在使用温度为70℃，工作压力为1．2MPa条件下，长期连续使用，寿命可达50年以上。2．4轻质高强、流体阻力小PP－R管密度仅为金属管的1／8，耐压力试验强度高达5MPa，且韧性好、耐冲击。由于内壁光滑、不生锈、不结垢，流体阻力小。PP－R管的主要技术指标如下：密度．9g／cm3弹性模量（20℃）　　800MPa热膨胀系数1．8×10－4／K导热系数　　0．2W／（m.K）　　纵向收缩率　　2％　　冲击试验　　破损率≤10％　　液压试验　　短期　　1h，环应力16MPa无渗漏　　长
希望您采纳谢谢

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