SU1641638A1 - Device for welding pipes of thermoplastic materials - Google Patents

Device for welding pipes of thermoplastic materials Download PDF

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Publication number
SU1641638A1
SU1641638A1 SU884610061A SU4610061A SU1641638A1 SU 1641638 A1 SU1641638 A1 SU 1641638A1 SU 884610061 A SU884610061 A SU 884610061A SU 4610061 A SU4610061 A SU 4610061A SU 1641638 A1 SU1641638 A1 SU 1641638A1
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SU
USSR - Soviet Union
Prior art keywords
rack
pipes
distribution table
welding
racks
Prior art date
Application number
SU884610061A
Other languages
Russian (ru)
Inventor
Лион Маркусович Шмульский
Соломон Натанович Эпельфельд
Николай Афанасьевич Цецюра
Алексей Абрамович Персион
Original Assignee
Киевский филиал Всесоюзного научно-исследовательского института по монтажным и специальным строительным работам
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Priority to SU884610061A priority Critical patent/SU1641638A1/en
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Publication of SU1641638A1 publication Critical patent/SU1641638A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2053—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
    • B29C65/2084—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by pivoting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" and involving the use of a facer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02241—Cutting, e.g. by using waterjets, or sawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Изобретение относитс  к сварке пластмасс и может найти применение при сварке труб из термопластов. Цель - повышение удобства в обслуживании устройства и снижение металлоемкости. Дл  этого в устройстве дл  сварки труб из термопластов раздаточный и приемный стеллажи установлены напротив друг друга по разные стороны рольгангов и снабжены размещенным между ними распределительным столом и упорами. Упоры расположены на обращен1 ных к столу концах стеллажей. Упор раздаточного стеллажа установлен под столом, а упор приемного стеллажа - над ним. Распределительный стол снабжен приводом его вертикального перемещени  и поворота относительно горизонтальной оси. параллельной ос м стыковочных узлов. Кроме того , распределительный стол подпружинен относительно основани . Раздаточный стеллаж снабжен отсекателем. 2 з.п. ф-лы, 4 ил. w ЁThe invention relates to the welding of plastics and may find application in welding of pipes from thermoplastics. The goal is to increase the ease of maintenance of the device and reduce metal consumption. For this, in the device for welding pipes from thermoplastics, the dispensing and receiving racks are installed opposite each other on different sides of the roller tables and are equipped with a distribution table and supports placed between them. The stops are located on the ends of the racks facing the table. The emphasis of the dispensing rack is installed under the table, and the emphasis of the receiving rack is above it. The distribution table is provided with a drive for its vertical movement and rotation about the horizontal axis. parallel to the axis of the docking stations. In addition, the distribution table is spring-loaded relative to the base. The distributing rack is supplied with the cut-off. 2 hp f-ly, 4 ill. w Ё

Description

Изобретение относитс  к сварке пластмасс и может найти применение при сварке труб из термопластов.The invention relates to the welding of plastics and may find application in welding of pipes from thermoplastics.

Цель изобретени  - повышение удобства в обслуживании устройства и снижение металлоемкости.The purpose of the invention is to improve the ease of maintenance of the device and reduce metal consumption.

На фиг. 1 изображено устройство, план; на фиг. 2 - разрез А-А на фиг. 1; на фиг. 3 - вид Б на фиг. 1; на фиг. 4 - вид В на фиг. 3.FIG. 1 shows a device plan; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4 is a view of B in FIG. 3

Устройство дл  сварки труб из термопластов содержит основание 1 с установленными на нем стыковочными узлами 2 и 3, расположенными по разные стороны относительно вала 4.A device for welding thermoplastic pipes contains a base 1 with docking stations 2 and 3 installed on it, which are located on opposite sides relative to the shaft 4.

Каждый стыковочный узел содержит направл ющую 5, на которой расположены опоры 6, соединенные с гидроцилиндром 7 и снабженные хомутами, каждый из которых состоит из двух полухомутов 8 и 9.Each docking assembly contains a guide 5, on which supports 6 are connected, connected to a hydraulic cylinder 7 and provided with clamps, each of which consists of two half-clamps 8 and 9.

Каждый из полухомутов 8 закреплен на соответствующей опоре 6 и шарниром 10 соединен с одним концом полухомута 9, другой конец которого соединен с гидроцилиндром 11. Направл ющие 5 стыковочных узлов 2 и 3 параллельны валу 4, который расположен с возможностью вращени  в подшипниках 12, жестко закрепленных на стойках 13, установленных на основании. Вал 4 состоит из двух соосных участков 14 иEach of the half-sleeves 8 is fixed on the corresponding support 6 and the hinge 10 is connected to one end of the half-sleeve 9, the other end of which is connected to the hydraulic cylinder 11. The guides 5 of the docking stations 2 and 3 are parallel to the shaft 4, which is rotatably mounted in bearings 12 rigidly fixed on racks 13 mounted on the base. Shaft 4 consists of two coaxial sections 14 and

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15, жестко соединенных с корпусом 16 торцовки 17. На одном из участков 14 вала 4 с возможностью вращени  и без возможности продольного перемещени  относительно вала 4 установлена обойма 18, к которой жестко прикреплен нагреватель 19. Нагреватель 19 и торцовка 17 обладают возможностью поворота в обе стороны (положение II и 111 на фиг. 4) до совмещени  с продольными ос ми 20 хомутов стыковочных узлов 2 иЗ. В корпусе 16 торцовки 17 закреплен вал 21, на котором жестко установлены звездочка 22 и расположенные по обе стороны от нее ножевые диски 23. Участок 15 вала 4 выполнен полым. Внутри него с возможностью вращени  относительно вала 4 расположен дополнительный вал 24, на концах которого установлены звездочки 25 и 26. На основании 1 смонтирован привод 27, на валу которого установлена звездочка 28. Звездочки 22 и 25, а также 26 и 28 соответственно соединены цепными передачами 29 и 30. Обойма 18 и участок 15 вала 4 соединены соответственно с черв чными редукторами 31 и 32, каждый из которых снабжен приводом 33. Черв чные редукторы 31 и 32 с приводами 33 размещены соответственно на кронштейнах 34 и 35, жестко установленных на стойках 13,15, rigidly connected to the housing 16 of the facing 17. On one of the sections 14 of the shaft 4, a rotation 18 is mounted for rotation and without the possibility of longitudinal movement relative to the shaft 4, to which the heater 19 is rigidly attached. The heater 19 and facing 17 have the possibility of rotation in both directions (position II and 111 in Fig. 4) before combining with the longitudinal axes 20 clamps of the docking stations 2 and 3. In case 16 of trimming 17, shaft 21 is fixed, on which an asterisk 22 is rigidly mounted and knife disks 23 located on either side of it. Section 15 of shaft 4 is made hollow. Inside it is rotatable with respect to shaft 4 there is an additional shaft 24, on the ends of which sprockets 25 and 26 are mounted. On base 1 there is mounted an actuator 27, on the shaft of which an asterisk 28 is mounted. Stars 22 and 25, and also 26 and 28 are connected by chain gears 29 and 30. The yoke 18 and the section 15 of the shaft 4 are connected respectively to the worm gearboxes 31 and 32, each of which is equipped with a drive 33. The worm gearboxes 31 and 32 with the drives 33 are placed respectively on the brackets 34 and 35 rigidly mounted on the uprights 13 ,

Реверсивные рольганги 36 и 37 расположены соосно стыковочным узлам 2 и 3. С обеих сторон рольгангов 36 и 37 напротив друг друга установлены раздаточный 38 (дл  хранени  отдельных труб) и приемный 39 (дл  хранени  сваренных плетей труб) стеллажи . Стеллаж 38 снабжен отсекателем 40. Между стеллажами 38 и 39 установлен распределительный стол 41. К средней части распределительного стола 41 шарнирно прикреплен гидроцилиндр 42, установленный на основании 1. Гидроцилиндр 42 обеспечивает вертикальное перемещение стола 41 и поворот его относительно горизонтальной оси, параллельной ос м стыковочных узлов.The reversing roller tables 36 and 37 are arranged coaxially with the docking stations 2 and 3. On both sides of the roller tables 36 and 37, distributing 38 (for storing individual pipes) and receiving 39 (for storing welded pipe bands) racks are installed opposite each other. The rack 38 is provided with a cutter 40. A distribution table 41 is installed between the racks 38 and 39. A hydraulic cylinder 42 mounted on the base 1 is pivotally attached to the middle part of the distribution table 41. The hydraulic cylinder 42 provides vertical movement of the table 41 and its rotation relative to the horizontal axis parallel to the joining axis knots.

Гидроцилиндры 7 стыковочных узлов 2 и 3, гидроцилиндры 11 полухомутов 8, а также гидроцилиндр 42 соединены с общей насосной станцией (не показана). Гидроцилиндр 42 смещен от центра т жести стола, 41 в сторону стеллажа 39. Стеллажи 38 и 39 снабжены соответственно упорами 43 и 44, расположенными на обращенных к столу концах стеллажей. Распределительный стол 41 установлен с возможностью взаимодействи  с этими упорами, причем упор 43 расположен под, а упор 44 - над столом.The hydraulic cylinders 7 docking stations 2 and 3, the hydraulic cylinders 11 half-sleeves 8, as well as the hydraulic cylinder 42 are connected to a common pumping station (not shown). The hydraulic cylinder 42 is offset from the center of the table body, 41 towards the rack 39. The racks 38 and 39 are provided with lugs 43 and 44 respectively located on the ends of the racks facing the table. Distribution table 41 is installed with the ability to interact with these stops, and the stop 43 is located under, and the stop 44 - above the table.

На основании 1 может быть установлена пружина 45, взаимодействующа  со столом 41 и обеспечивающа  его установку вOn base 1, a spring 45 can be installed, interacting with table 41 and ensuring its installation in

нейтральное положение (стол одновременно взаимодействует с упорами 43 и 44).neutral position (the table simultaneously interacts with the stops 43 and 44).

Устройство работает следующим образом .The device works as follows.

В нерабочем положении торцовка 17 иIn the off position trimming 17 and

нагреватель 19 наход тс  в положении I (фиг. 4). Отдельные трубы размещают на стеллаже 38. При помощи стола 41 эти предназначенные дл  сварки трубы подаютheater 19 is in position I (Fig. 4). Separate pipes are placed on the rack 38. Using the table 41, these welding pipes serve

на один из рольгангов 36 или 37. Дл  этого гидроцилиндром 42 стол 41 опускают на соответствующую величину. При этом стол поворачиваетс  относительно упора 43 и освобождаемые при помощи отсекател  40onto one of the live rolls 36 or 37. For this, the hydraulic cylinder 42 lowers the table 41 by the appropriate amount. In this case, the table is rotated relative to the stop 43 and released with the help of the shutter 40.

трубы по очереди скатываютс  со стеллажа 38 на соответствующий рольганг (например 36) и подаютс  в стыковочный узел 2, Гидроцилиндрами 11 трубы закрепл ют в полухомутах 8 и 9. Одним из приводов 33 черезthe pipes in turn roll down from the rack 38 to the corresponding roller table (for example, 36) and are fed to the docking station 2, the cylinders 11 are fixed in the half-sleeves 8 and 9. One of the drives 33 through

редуктор 31 поворачивают торцовку 17 в положение II. Гидроцилиндром 7 прижимают свариваемые трубы к ножевым дискам 23, которые привод т во вращение приводом 27 через цепные передачи 29 и 30. Поеле окончани  обработки торцов гидроцилиндром 7 трубы развод т, торцовку 17 устанавливают в исходное положение I, другим приводом 33 через редуктор 32 устанавливают между свариваемыми трубами нагреватель 19 и прижимают к нему торцы труб. После нагрева нагреватель вывод т из зоны сварки и сдавливают трубы с заданным давлением. В этом положении свариваемые трубы должны находитьс  доthe gear 31 rotate the trim 17 to position II. The hydraulic cylinder 7 presses the pipes to be welded to the blade disks 23, which are driven by the drive 27 through chain drives 29 and 30. After the ends of the ends are machined by the hydraulic cylinder 7, the pipe is set apart, trimming 17 is set to its original position I, and another drive 33 is installed between reducer 32 welded pipes heater 19 and pressed to him the ends of the pipes. After heating, the heater is removed from the weld zone and the pipes are pressed at a predetermined pressure. In this position, the pipes to be welded must be up to

их остывани . В это врем  со стеллажа 38 при помощи рольганга 37 в стыковочный узел 3 подают следующую пару свариваемых труб. Процесс сварки производ т аналогичным образом. Во врем  остывани their cooling down. At this time, from the rack 38, with the help of a roller table 37, the next pair of pipes being welded is supplied to the docking station 3. The welding process is done in a similar way. During cooling

стыка труб в стыковочном узле 3 плеть труб с уже остывшим стыком из стыковочного узла 2 рольгангом 36 подают в зону приемного стеллажа 39. Гидроцилиндром 42 стол подымают, при этом он поворачиваетс  относительно упора 44 и плеть труб скатываетс  на приемный стеллаж 39. После этого на рольганг 36 со стеллажа 38 подают очередную пару труб. Цикл повтор етс .the pipe joint in the docking station 3, the lash of the pipes with the already cooled joint from the docking station 2, roller table 36 is supplied to the receiving rack area 39. The cylinder 42 is lifted by the hydraulic cylinder 42, and it rotates relative to the stop 44, and the pipe pipe is rolled onto the receiving rack 39. Thereafter, the roller table 36 from the rack 38 serves the next couple of pipes. The cycle is repeated.

Claims (3)

1. Устройство дл  сварки труб из термопластов , содержащее основание, на котором смонтированы стыковочные узлы, установленные соосно им рольганги, раздаточный и приемный стеллажи, отличающеес  тем, что, с целью повышени  удобства в обслуживании устройства и снижени  материалоемкости, раздаточный и приемный стеллажи установлены напротив1. A device for welding thermoplastic pipes, comprising a base on which docking stations, coaxial rollers installed, distributing and receiving racks are mounted, characterized in that, in order to increase the ease of maintenance of the device and reduce material consumption, the distributing and receiving racks are installed opposite друг друга по разные стороны рольгангов иeach other on different sides of the live rolls and снабжены размещенным между ними распределительным столом и упорами, расположенными на обращенных к столу концах стеллажей, при этом упор раздаточного стеллажа установлен под столом, и упор приемного стеллажа - над ним, причем распределительный стол снабжен приводом его вертикального перемещени  и поворотаprovided with a distribution table placed between them and stops located on the ends of the racks facing the table, while the emphasis of the dispensing rack is installed under the table, and the stop of the receiving rack is above it, the distribution table being equipped with a drive for its vertical movement and rotation относительно горизонтальной оси, параллельной ос м стыковочных узлов.with respect to the horizontal axis parallel to the axis of the docking stations. 2.Устройство по п. 1, отличающеес  тем, что распределительный стол подпружинен относительно основани .2. A device according to claim 1, characterized in that the distribution table is spring-loaded relative to the base. 3.Устройство по п. 1, отличающеес  тем, что раздаточный стеллаж снабжен отсекателем.3. The device according to claim 1, characterized in that the dispensing rack is provided with a cut-off device. Фиг. 2FIG. 2 Фиг.11 &идб& idb w.w. гg
SU884610061A 1988-11-28 1988-11-28 Device for welding pipes of thermoplastic materials SU1641638A1 (en)

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SU884610061A SU1641638A1 (en) 1988-11-28 1988-11-28 Device for welding pipes of thermoplastic materials

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Application Number Priority Date Filing Date Title
SU884610061A SU1641638A1 (en) 1988-11-28 1988-11-28 Device for welding pipes of thermoplastic materials

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SU1641638A1 true SU1641638A1 (en) 1991-04-15

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SU884610061A SU1641638A1 (en) 1988-11-28 1988-11-28 Device for welding pipes of thermoplastic materials

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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 1362651, кл. В 29 С 65/18, 1965. Технологи сварочно-монтажных работ при сооружении полиэтиленовых трубопроводов на нефтегазопромыслах. М.: ВСН 190-85 Миннефтегазстрой, ВНИИ СТ, 1986, с. 34-35. *

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