CN111251621B - 一种聚酯薄膜的生产工艺 - Google Patents

一种聚酯薄膜的生产工艺 Download PDF

Info

Publication number
CN111251621B
CN111251621B CN202010144552.5A CN202010144552A CN111251621B CN 111251621 B CN111251621 B CN 111251621B CN 202010144552 A CN202010144552 A CN 202010144552A CN 111251621 B CN111251621 B CN 111251621B
Authority
CN
China
Prior art keywords
cutter
rod
cast piece
cutting
polyester film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010144552.5A
Other languages
English (en)
Other versions
CN111251621A (zh
Inventor
郭芮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANTONG KINGWAY COMPLEX MATERIAL Co.,Ltd.
Original Assignee
Nantong Kingway Complex Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nantong Kingway Complex Material Co ltd filed Critical Nantong Kingway Complex Material Co ltd
Priority to CN202010144552.5A priority Critical patent/CN111251621B/zh
Publication of CN111251621A publication Critical patent/CN111251621A/zh
Application granted granted Critical
Publication of CN111251621B publication Critical patent/CN111251621B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B26D1/085Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type for thin material, e.g. for sheets, strips or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/10Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
    • B26D1/105Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge for thin material, e.g. for sheets, strips or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D11/00Combinations of several similar cutting apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08Means for actuating the cutting member to effect the cut
    • B26D5/12Fluid-pressure means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01Means for holding or positioning work
    • B26D7/018Holding the work by suction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00Conditioning or physical treatment of the material to be shaped
    • B29B13/06Conditioning or physical treatment of the material to be shaped by drying
    • B29B13/065Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/005Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92514Pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/9258Velocity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92704Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003PET, i.e. poylethylene terephthalate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00Flat articles, e.g. films or sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

本发明属于聚酯薄膜技术领域,具体的说是一种聚酯薄膜的生产工艺;本工艺使用的切缝设备包括底座,所述底座顶部固连有弯杆,弯杆顶部向一侧弯曲后并向下弯曲,且弯杆顶端固连有水平滑轨;本发明通过将横切刀使用液压杆安装在水平滑轨上,然后在横切刀底部安装有纵切刀,使纵切刀的尖端位于铸片上方靠近铸片边缘的位置处,然后控制液压杆下移,纵切刀能够向下切割铸片,切出一个口子后,使横切刀完全贯穿铸片,然后水平滑轨带动横切刀对铸片进行横向切割,当横切刀移动到铸片另一边缘处而未将铸片完全切断时,停止水平滑轨的工作,此时铸片两边缘处没有断开,收集辊收卷铸片时,不会造成断裂,提高了切片时的效率。

Description

一种聚酯薄膜的生产工艺
技术领域
本发明属于聚酯薄膜技术领域,具体的说是一种聚酯薄膜的生产工艺。
背景技术
聚酯薄膜(PET)是以聚对苯二甲酸乙二醇酯为原料,采用挤出法制成厚片,再经双向拉伸制成的薄膜材料。聚酯薄膜、环保胶片、PET胶片、乳白胶片等印刷包装耗材,广泛用于玻璃钢行业、建材行业、印刷行业、医药卫生。聚酯膜又叫聚酯薄膜、光片、涤纶膜、感光纸、聚脂膜、苯锡膜、玻璃纸、离型膜。
由于对铸片后的聚酯薄膜进行切片时,都是通过收集辊将铸片收卷起来,然后在收卷过程中从一侧对聚酯薄膜进行切割,切割到一定程度后,停止切除,在两端切割处之间的位置即为一片聚酯薄膜,在收卷过程中,容易造成切开处的聚酯薄膜发生断裂,进而还需重新将聚酯薄膜缠绕在收集辊上,影响整体的切片效率,鉴于此,本发明提供了一种聚酯薄膜的生产工艺,其能够降低切片过程中断裂情况的发生,提高切片时的效率。
发明内容
针对现有技术的不足,本发明提供了一种聚酯薄膜的生产工艺,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种聚酯薄膜的生产工艺,该工艺包括以下步骤:
S1:预结晶干燥,将聚酯熔体经预结晶干燥,控制聚酯熔体含水量在35ppm以下,同时结晶度为30-35%;预结晶温度为160-175℃,干燥温度为150-165℃,除湿温度为135-145℃,预结晶干燥时间为2.5-4.5小时;
S2:熔融挤出,挤出机预热段温度控制在260-270℃,熔融段温度控制在275-290℃,聚酯熔体经计量泵、过滤器和熔体线由模头挤出,挤出速度控制在36-40r/min;模头的模唇开度控制在2.0-3.5mm,模头挤出压力控制在30-60bar,挤出速度控制在36-40r/min;
S3:铸片,聚酯熔体经表面温度为25-30℃的冷鼓进行冷却,经过高压静电附膜系统,形成结晶度小于3%的铸片;先经过温度为25-30℃的冷鼓进行冷却后,能够使铸片更好的定型;
S4:纵向拉伸,铸片经预热后纵向拉伸,拉伸温度控制在78-85℃,冷却温度控制在25-40℃;先预热再拉伸,并保持拉伸温度在78-85℃,较好的保持铸片的柔韧性;
S5:横向拉伸,纵向拉伸后的铸片经预热后横向拉伸,拉伸温度控制在115-130℃,经热定型后进行逐步冷却至常温,控制聚酯薄膜结晶度达到50%以上;横向拉伸的温度比纵向拉伸的温度高,是因为先经过纵向拉伸后,拉伸的难度变大,因此将温度变大后,更好的对纵向拉伸后的铸片进行横向拉伸;
S6:牵引收卷切片,采用接触方式收卷,收卷压力比率控制在15-40%,张力比率控制在85-95%;并将在收卷过程中通过切缝设备进行切缝;通过切缝设备进行切缝,无需再对其进行切片,后续收集较为便利;
其中,S6中所述的切缝设备包括底座,所述底座顶部固连有弯杆,弯杆顶部向一侧弯曲后并向下弯曲,且弯杆顶端固连有水平滑轨;所述水平滑轨底部安装有液压杆,液压杆的输出端固连有横切刀,横切刀底部设置有纵切刀,纵切刀一端连接在横切刀的刀刃的底部位置处,且纵切刀另一端的高度比此端的高度低;所述横切刀底部分别设置有收集辊和导向辊,且导向辊位于收集辊前方,收集辊和导向辊均通过支撑杆安装在底座上方;使用时,由于对铸片后的聚酯薄膜进行切片时,都是通过收集辊将铸片收卷起来,然后在收卷过程中从一侧对聚酯薄膜进行切割,切割到一定程度后,停止切除,在两端切割处之间的位置即为一片聚酯薄膜,在收卷过程中,容易造成切开处的聚酯薄膜发生断裂,进而还需重新将聚酯薄膜缠绕在收集辊上,影响整体的切片效率;因此本发明主要解决的是如何降低切片过程中断裂情况的发生,提高切片时的效率;具体采取的措施及工作过程如下:通过将横切刀使用液压杆安装在水平滑轨上,然后在横切刀底部安装有纵切刀,在对铸片进行切割前,通过水平滑轨和液压杆的使用,使纵切刀的尖端位于铸片上方靠近铸片边缘的位置处,然后控制液压杆下移,纵切刀能够向下切割铸片,切出一个口子后,使横切刀完全贯穿铸片,然后再启动控制水平滑轨的工作,水平滑轨能够带动横切刀对铸片进行横向切割,当横切刀移动到铸片另一边缘处而未将铸片完全切断时,停止水平滑轨的工作,通过液压杆带动横切刀和纵切刀向上,从铸片上移出,此时铸片两边缘处没有断开,收集辊收卷铸片时,不会造成断裂,提高了切片时的效率;在将铸片收卷过程中,水平滑轨带动横切刀和纵切刀回到原位,进行下一次的切片操作,如此循环往复,将一整个铸片进行切片,而分成多个部分,每次使用,只需从切缝处撕开一个聚酯薄膜即可。
优选的,所述纵切刀铰接在横切刀刀刃的底部位置处,且纵切刀顶部远离铰接点的位置处固连有弧形杆,弧形杆顶端位于横切刀内部,且弧形杆底部固连有横杆,横杆两端底部均固连有辅杆,横切刀内部开设有弧形腔,辅杆底端位于弧形腔内部,弧形腔底部的横切刀上开设有吸气孔,吸气孔的底端朝向纵切刀的自由端;在纵切刀下移时,纵切刀会向下挤压铸片,同时铸片会对纵切刀有一个向上的反作用力,进而使纵切刀的自由端绕着铰接点向上转动,纵切刀会推动弧形杆向上,弧形杆会对东横杆向上,横杆会带动辅杆向上,辅杆底端在弧形腔内移动时,会通过吸气孔从下方向弧形腔内抽气,即会从铸片与纵切刀接触的位置处抽气,由于负压的作用,铸片会向上被抽动,进而铸片能够与纵切刀紧紧接触,纵切刀对铸片切割时,切割效率高,切割效果好。
优选的,所述横切刀前侧面和后侧面均固连有拉绳,每个拉绳上均穿有两个滚珠;纵切刀将铸片切割出一个口子,横切刀下移过程中,滚珠会被向下带动,最下方的滚珠越过切口处的铸片,到达铸片下方,此时同一个拉绳上的两个滚珠能够对铸片起到夹持作用,在横切刀对铸片进行横向切割时,两个滚珠能够保证被切割过的铸片处于水平状态,进而保证横切刀行进切割过程中,不会发生铸片的上下偏折的现象,而影响切割时的效果。
优选的,所述拉绳底端由弹性材料制成,用于在滚珠受到挤压时,滚珠能够向上移动;拉绳底端具有一定弹性后,在横切刀向下移动过程中,下方的滚珠先与铸片接触后,拉绳底端处能变长,滚珠进而能够在与铸片接触后向上移动,有一定的缓冲效果,防止滚珠下移时直接撞击到铸片上,影响铸片表面的完整性。
优选的,所述弧形腔内设置有弹性膜,弹性膜中部开设有条形开口;由于纵切刀在对铸片完全切割后,向上转动的纵切刀没有外力向上推动,此时,纵切刀的自由端会受到重力的作用向下转动,最终会在辅杆底端在弧形腔内向下移动时,弧形腔内的气体快速由吸气孔喷出,会对铸片有向下吹动的效果,影响横切刀水平切割铸片时的效果,因此在弧形腔内部设置有弹性膜,当辅杆首先脱离弹性膜向上运动后,在纵切刀的自由端向下转动时,辅杆会首先撞击到弹性膜上,由于有弹性膜的阻挡,能够降低辅杆的下移速度,当辅杆底端经过条形开口继续向下后,由于有弹性膜的摩擦作用,进一步降低了气体从吸气口吹出的速度,保证了横切刀水平切割铸片时的效果。
优选的,所述辅杆插接有底杆,底杆底端为一尖端,且底杆顶端能够在辅杆内上下移动;辅杆底端有能够沿其上下移动的底杆,底杆能够率先与弹性膜接触,底杆底端为尖端,能够保证底杆将条形开口打开,防止弹性膜影响辅杆的通过,同时底杆尖端完全向下越过弹性膜后,底杆会快速沿辅杆向下移动,底杆首先将弧形腔内的一小部分气体推出,底杆推动的气体的量较少,对铸片影响的效果小,然后底杆带动辅杆撞击到弹性膜上,使辅杆顺利通过弹性膜,进一步保证了辅杆的通过。
本发明的技术效果和优点:
1、本发明提供的一种聚酯薄膜的生产工艺,通过将横切刀使用液压杆安装在水平滑轨上,然后在横切刀底部安装有纵切刀,使纵切刀的尖端位于铸片上方靠近铸片边缘的位置处,然后控制液压杆下移,纵切刀能够向下切割铸片,切出一个口子后,使横切刀完全贯穿铸片,然后水平滑轨带动横切刀对铸片进行横向切割,当横切刀移动到铸片另一边缘处而未将铸片完全切断时,停止水平滑轨的工作,此时铸片两边缘处没有断开,收集辊收卷铸片时,不会造成断裂,提高了切片时的效率。
2、本发明提供的一种聚酯薄膜的生产工艺,通过液压杆推动纵切刀会向下挤压铸片,同时铸片会对纵切刀有一个向上的反作用力,进而使纵切刀的自由端绕着铰接点向上转动,纵切刀会推动弧形杆向上,弧形杆会对东横杆向上,横杆会带动辅杆向上,辅杆底端在弧形腔内移动时,会通过吸气孔从下方向弧形腔内抽气,即会从铸片与纵切刀接触的位置处抽气,由于负压的作用,铸片会向上被抽动,进而铸片能够与纵切刀紧紧接触,纵切刀对铸片切割时,切割效率高,切割效果好。
附图说明
下面结合附图对本发明作进一步说明。
图1是本发明的工艺流程图;
图2是本发明中使用的切缝设备立体示意图;
图3是本发明中图2的A部放大图;
图4是本发明中使用的切缝设备的主视图;
图5是本发明中图4的B部放大图;
图6是弹性膜的结构示意图;
图中:底座1、弯杆2、水平滑轨3、液压杆4、横切刀5、纵切刀6、收集辊7、导向辊8、弧形杆9、横杆10、辅杆11、弧形腔12、吸气孔13、拉绳14、滚珠15、弹性膜16、条形开口17、支撑杆18、底杆19。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体实施方式,进一步阐述本发明,本发明中前、后、左、右、上、下均是基于图4的视图方向。
如图1-6所示,本发明所述的一种聚酯薄膜的生产工艺,该工艺包括以下步骤:
S1:预结晶干燥,将聚酯熔体经预结晶干燥,控制聚酯熔体含水量在35ppm以下,同时结晶度为30-35%;预结晶温度为160-175℃,干燥温度为150-165℃,除湿温度为135-145℃,预结晶干燥时间为2.5-4.5小时;
S2:熔融挤出,挤出机预热段温度控制在260-270℃,熔融段温度控制在275-290℃,聚酯熔体经计量泵、过滤器和熔体线由模头挤出,挤出速度控制在36-40r/min;模头的模唇开度控制在2.0-3.5mm,模头挤出压力控制在30-60bar,挤出速度控制在36-40r/min;
S3:铸片,聚酯熔体经表面温度为25-30℃的冷鼓进行冷却,经过高压静电附膜系统,形成结晶度小于3%的铸片;先经过温度为25-30℃的冷鼓进行冷却后,能够使铸片更好的定型;
S4:纵向拉伸,铸片经预热后纵向拉伸,拉伸温度控制在78-85℃,冷却温度控制在25-40℃;先预热再拉伸,并保持拉伸温度在78-85℃,较好的保持铸片的柔韧性;
S5:横向拉伸,纵向拉伸后的铸片经预热后横向拉伸,拉伸温度控制在115-130℃,经热定型后进行逐步冷却至常温,控制聚酯薄膜结晶度达到50%以上;横向拉伸的温度比纵向拉伸的温度高,是因为先经过纵向拉伸后,拉伸的难度变大,因此将温度变大后,更好的对纵向拉伸后的铸片进行横向拉伸;
S6:牵引收卷切片,采用接触方式收卷,收卷压力比率控制在15-40%,张力比率控制在85-95%;并将在收卷过程中通过切缝设备进行切缝;通过切缝设备进行切缝,无需再对其进行切片,后续收集较为便利;
其中,S6中所述的切缝设备包括底座1,所述底座1顶部固连有弯杆2,弯杆2顶部向一侧弯曲后并向下弯曲,且弯杆2顶端固连有水平滑轨3;所述水平滑轨3底部安装有液压杆4,液压杆4的输出端固连有横切刀5,横切刀5底部设置有纵切刀6,纵切刀6一端连接在横切刀5的刀刃的底部位置处,且纵切刀6另一端的高度比此端的高度低;所述横切刀5底部分别设置有收集辊7和导向辊8,且导向辊8位于收集辊7前方,收集辊7和导向辊8均通过支撑杆18安装在底座1上方;使用时,由于对铸片后的聚酯薄膜进行切片时,都是通过收集辊7将铸片收卷起来,然后在收卷过程中从一侧对聚酯薄膜进行切割,切割到一定程度后,停止切除,在两端切割处之间的位置即为一片聚酯薄膜,在收卷过程中,容易造成切开处的聚酯薄膜发生断裂,进而还需重新将聚酯薄膜缠绕在收集辊7上,影响整体的切片效率;因此本发明主要解决的是如何降低切片过程中断裂情况的发生,提高切片时的效率;具体采取的措施及工作过程如下:通过将横切刀5使用液压杆4安装在水平滑轨3上,然后在横切刀5底部安装有纵切刀6,在对铸片进行切割前,通过水平滑轨3和液压杆4的使用,使纵切刀6的尖端位于铸片上方靠近铸片边缘的位置处,然后控制液压杆4下移,纵切刀6能够向下切割铸片,切出一个口子后,使横切刀5完全贯穿铸片,然后再启动控制水平滑轨3的工作,水平滑轨3能够带动横切刀5对铸片进行横向切割,当横切刀5移动到铸片另一边缘处而未将铸片完全切断时,停止水平滑轨3的工作,通过液压杆4带动横切刀5和纵切刀6向上,从铸片上移出,此时铸片两边缘处没有断开,收集辊7收卷铸片时,不会造成断裂,提高了切片时的效率;在将铸片收卷过程中,水平滑轨3带动横切刀5和纵切刀6回到原位,进行下一次的切片操作,如此循环往复,将一整个铸片进行切片,而分成多个部分,每次使用,只需从切缝处撕开一个聚酯薄膜即可。
所述纵切刀6铰接在横切刀5刀刃的底部位置处,且纵切刀6顶部远离铰接点的位置处固连有弧形杆9,弧形杆9顶端位于横切刀5内部,且弧形杆9底部固连有横杆10,横杆10两端底部均固连有辅杆11,横切刀5内部开设有弧形腔12,辅杆11底端位于弧形腔12内部,弧形腔12底部的横切刀5上开设有吸气孔13,吸气孔13的底端朝向纵切刀6的自由端;在纵切刀6下移时,纵切刀6会向下挤压铸片,同时铸片会对纵切刀6有一个向上的反作用力,进而使纵切刀6的自由端绕着铰接点向上转动,纵切刀6会推动弧形杆9向上,弧形杆9会对东横杆10向上,横杆10会带动辅杆11向上,辅杆11底端在弧形腔12内移动时,会通过吸气孔13从下方向弧形腔12内抽气,即会从铸片与纵切刀6接触的位置处抽气,由于负压的作用,铸片会向上被抽动,进而铸片能够与纵切刀6紧紧接触,纵切刀6对铸片切割时,切割效率高,切割效果好。
所述横切刀5前侧面和后侧面均固连有拉绳14,每个拉绳14上均穿有两个滚珠15;纵切刀6将铸片切割出一个口子,横切刀5下移过程中,滚珠15会被向下带动,最下方的滚珠15越过切口处的铸片,到达铸片下方,此时同一个拉绳14上的两个滚珠15能够对铸片起到夹持作用,在横切刀5对铸片进行横向切割时,两个滚珠15能够保证被切割过的铸片处于水平状态,进而保证横切刀5行进切割过程中,不会发生铸片的上下偏折的现象,而影响切割时的效果。
所述拉绳14底端由弹性材料制成,用于在滚珠15受到挤压时,滚珠15能够向上移动;拉绳14底端具有一定弹性后,在横切刀5向下移动过程中,下方的滚珠15先与铸片接触后,拉绳14底端处能变长,滚珠15进而能够在与铸片接触后向上移动,有一定的缓冲效果,防止滚珠15下移时直接撞击到铸片上,影响铸片表面的完整性。
所述弧形腔12内设置有弹性膜16,弹性膜16中部开设有条形开口17;由于纵切刀6在对铸片完全切割后,向上转动的纵切刀6没有外力向上推动,此时,纵切刀6的自由端会受到重力的作用向下转动,最终会在辅杆11底端在弧形腔12内向下移动时,弧形腔12内的气体快速由吸气孔13喷出,会对铸片有向下吹动的效果,影响横切刀5水平切割铸片时的效果,因此在弧形腔12内部设置有弹性膜16,当辅杆11首先脱离弹性膜16向上运动后,在纵切刀6的自由端向下转动时,辅杆11会首先撞击到弹性膜16上,由于有弹性膜16的阻挡,能够降低辅杆11的下移速度,当辅杆11底端经过条形开口17继续向下后,由于有弹性膜16的摩擦作用,进一步降低了气体从吸气口吹出的速度,保证了横切刀5水平切割铸片时的效果。
所述辅杆11插接有底杆19,底杆19底端为一尖端,且底杆19顶端能够在辅杆11内上下移动;辅杆11底端有能够沿其上下移动的底杆19,底杆19能够率先与弹性膜16接触,底杆19底端为尖端,能够保证底杆19将条形开口17打开,防止弹性膜16影响辅杆11的通过,同时底杆19尖端完全向下越过弹性膜16后,底杆19会快速沿辅杆11向下移动,底杆19首先将弧形腔12内的一小部分气体推出,底杆19推动的气体的量较少,对铸片影响的效果小,然后底杆19带动辅杆11撞击到弹性膜16上,使辅杆11顺利通过弹性膜16,进一步保证了辅杆11的通过。
使用时,由于对铸片后的聚酯薄膜进行切片时,都是通过收集辊7将铸片收卷起来,然后在收卷过程中从一侧对聚酯薄膜进行切割,切割到一定程度后,停止切除,在两端切割处之间的位置即为一片聚酯薄膜,在收卷过程中,容易造成切开处的聚酯薄膜发生断裂,进而还需重新将聚酯薄膜缠绕在收集辊7上,影响整体的切片效率;因此本发明主要解决的是如何降低切片过程中断裂情况的发生,提高切片时的效率;具体采取的措施及工作过程如下:通过将横切刀5使用液压杆4安装在水平滑轨3上,然后在横切刀5底部安装有纵切刀6,在对铸片进行切割前,通过水平滑轨3和液压杆4的使用,使纵切刀6的尖端位于铸片上方靠近铸片边缘的位置处,然后控制液压杆4下移,纵切刀6能够向下切割铸片,切出一个口子后,使横切刀5完全贯穿铸片,然后再启动控制水平滑轨3的工作,水平滑轨3能够带动横切刀5对铸片进行横向切割,当横切刀5移动到铸片另一边缘处而未将铸片完全切断时,停止水平滑轨3的工作,通过液压杆4带动横切刀5和纵切刀6向上,从铸片上移出,此时铸片两边缘处没有断开,收集辊7收卷铸片时,不会造成断裂,提高了切片时的效率;在将铸片收卷过程中,水平滑轨3带动横切刀5和纵切刀6回到原位,进行下一次的切片操作,如此循环往复,将一整个铸片进行切片,而分成多个部分,每次使用,只需从切缝处撕开一个聚酯薄膜即可。
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (5)

1.一种聚酯薄膜的生产工艺,其特征在于:该工艺包括以下步骤:
S1:预结晶干燥,将聚酯熔体经预结晶干燥,控制聚酯熔体含水量在35ppm以下,同时结晶度为30-35%;
S2:熔融挤出,挤出机预热段温度控制在260-270℃,熔融段温度控制在275-290℃,聚酯熔体经计量泵、过滤器和熔体线由模头挤出,挤出速度控制在36-40r/min;
S3:铸片,聚酯熔体经表面温度为25-30℃的冷鼓进行冷却,经过高压静电附膜系统,形成结晶度小于3%的铸片;
S4:纵向拉伸,铸片经预热后纵向拉伸,拉伸温度控制在78-85℃,冷却温度控制在25-40℃;
S5:横向拉伸,纵向拉伸后的铸片经预热后横向拉伸,拉伸温度控制在115-130℃,经热定型后进行逐步冷却至常温,控制聚酯薄膜结晶度达到50%以上;
S6:牵引收卷切片,采用接触方式收卷,收卷压力比率控制在15-40%,张力比率控制在85-95%;并将在收卷过程中通过切缝设备进行切缝;通过切缝设备进行切缝,无需再对其进行切片,后续收集较为便利;
其中,S6中所述的切缝设备包括底座(1),所述底座(1)顶部固连有弯杆(2),弯杆(2)顶部向一侧弯曲后并向下弯曲,且弯杆(2)顶端固连有水平滑轨(3);所述水平滑轨(3)底部安装有液压杆(4),液压杆(4)的输出端固连有横切刀(5),横切刀(5)底部设置有纵切刀(6),纵切刀(6)一端连接在横切刀(5)的刀刃的底部位置处,且纵切刀(6)另一端的高度比此端的高度低;所述横切刀(5)底部分别设置有收集辊(7)和导向辊(8),且导向辊(8)位于收集辊(7)前方,收集辊(7)和导向辊(8)均通过支撑杆(18)安装在底座(1)上方;
所述纵切刀(6)铰接在横切刀(5)刀刃的底部位置处,且纵切刀(6)顶部远离铰接点的位置处固连有弧形杆(9),弧形杆(9)顶端位于横切刀(5)内部,且弧形杆(9)底部固连有横杆(10),横杆(10)两端底部均固连有辅杆(11),横切刀(5)内部开设有弧形腔(12),辅杆(11)底端位于弧形腔(12)内部,弧形腔(12)底部的横切刀(5)上开设有吸气孔(13),吸气孔(13)的底端朝向纵切刀(6)的自由端。
2.根据权利要求1所述的一种聚酯薄膜的生产工艺,其特征在于:所述横切刀(5)前侧面和后侧面均固连有拉绳(14),每个拉绳(14)上均穿有两个滚珠(15)。
3.根据权利要求2所述的一种聚酯薄膜的生产工艺,其特征在于:所述拉绳(14)底端由弹性材料制成,用于在滚珠(15)受到挤压时,滚珠(15)能够向上移动。
4.根据权利要求1所述的一种聚酯薄膜的生产工艺,其特征在于:所述弧形腔(12)内设置有弹性膜(16),弹性膜(16)中部开设有条形开口(17)。
5.根据权利要求4所述的一种聚酯薄膜的生产工艺,其特征在于:所述辅杆(11)插接有底杆(19),底杆(19)底端为一尖端,且底杆(19)顶端能够在辅杆(11)内上下移动。
CN202010144552.5A 2020-03-04 2020-03-04 一种聚酯薄膜的生产工艺 Active CN111251621B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010144552.5A CN111251621B (zh) 2020-03-04 2020-03-04 一种聚酯薄膜的生产工艺

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010144552.5A CN111251621B (zh) 2020-03-04 2020-03-04 一种聚酯薄膜的生产工艺

Publications (2)

Publication Number Publication Date
CN111251621A CN111251621A (zh) 2020-06-09
CN111251621B true CN111251621B (zh) 2020-11-17

Family

ID=70945739

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010144552.5A Active CN111251621B (zh) 2020-03-04 2020-03-04 一种聚酯薄膜的生产工艺

Country Status (1)

Country Link
CN (1) CN111251621B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11806909B2 (en) 2020-12-22 2023-11-07 Nan Ya Plastics Corporation Biaxially oriented polyester film and manufacturing method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE547189A (zh) * 1955-04-22 1900-01-01
CN202934613U (zh) * 2012-11-16 2013-05-15 杭州福斯特光伏材料股份有限公司 塑料薄膜切割设备
CN103897355B (zh) * 2012-12-27 2015-08-26 天津世起科技发展有限公司 一种超薄聚酯薄膜及其制造方法
CN107243932B (zh) * 2017-05-31 2019-02-12 重庆安洁电子有限公司 膜分切调整装置

Also Published As

Publication number Publication date
CN111251621A (zh) 2020-06-09

Similar Documents

Publication Publication Date Title
CN104495486B (zh) 自动削棉机
CN111251621B (zh) 一种聚酯薄膜的生产工艺
CN105034338A (zh) 一种表层共挤缠绕管生产设备
CN213893179U (zh) 一种柔性薄膜连续切断机构
CN106739155B (zh) 塑料编织袋封口卷边设备
CN215287252U (zh) 一种全自动收卷切断机
CN204820310U (zh) 一种表层共挤缠绕管生产设备
CN204843099U (zh) 一种金属纤维切断机
CN115416086A (zh) 一种60m海绵工业化高效环切设备及生产工艺
CN105133218A (zh) 一种新型缝纫机控制装置
CN107471582A (zh) 一种全自动橡胶生产设备
CN211165418U (zh) 一种定长切割的尼龙拉链成型机
CN211897276U (zh) 一种设置有切边装置的织造机
CN204977344U (zh) 牵引收卷机中的切割装置
CN220864096U (zh) 丝带切断装置
CN113415661B (zh) 一种全自动收卷切断机
CN216551295U (zh) 一种广告用反光材料的面料加工设备
CN205000108U (zh) 一种新型缝纫机控制装置
CN218555171U (zh) 一种鱼钩生产制作用拉丝机
CN209971531U (zh) 一种带有毛刷辊的吹膜机
CN205775529U (zh) 一种新型分切装置
CN215397044U (zh) 一种隧道自粘式防水板/防排水板用粘接带生产装备
CN111977465B (zh) 一种四面弹面料弹性纱线的加工方法及加工设备
CN220520797U (zh) 一种涤纶衣物布料拼接的缝纫机
CN213111928U (zh) 一种纱线转移机构

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20201102

Address after: No.59, Kanghua Road, Haian Development Zone, Nantong City, Jiangsu Province, 226000

Applicant after: NANTONG KINGWAY COMPLEX MATERIAL Co.,Ltd.

Address before: No. n793, floor 3, xingguangyingjing, No. 117, Shuiyin Road, Yuexiu District, Guangzhou City, Guangdong Province

Applicant before: Guangzhou haokezhi Technology Development Co.,Ltd.

GR01 Patent grant
GR01 Patent grant