SU1442419A1 - Method of joining polymeric materials - Google Patents
Method of joining polymeric materials Download PDFInfo
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- SU1442419A1 SU1442419A1 SU874253182A SU4253182A SU1442419A1 SU 1442419 A1 SU1442419 A1 SU 1442419A1 SU 874253182 A SU874253182 A SU 874253182A SU 4253182 A SU4253182 A SU 4253182A SU 1442419 A1 SU1442419 A1 SU 1442419A1
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- welding
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- edge
- heat treatment
- weld
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Classifications
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- 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
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- 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"
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- 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
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- 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
- B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
- B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
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- 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
- B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
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- 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- 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
- B29C66/71—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 composition of the plastics material of the parts to be joined
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
- B29C66/8264—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using the thermal expansion of the parts to be joined
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- 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
- B29C66/43129—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles, i.e. oblique
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
- B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
Abstract
Изобретение относитс к сварке пластмасс, а именно к способам соединени термопластичных ориентированных материалов. Цель - повышение качества сварки термопластичных ориентированных материалов. Дл этого в способе соединени полимерных материалов в процессе предварительной термообработки каждую из соедин емых кромок зажимают в жесткой пресс-форме из материала, коэффициент термического расширени которого по меньшей мере равен коэффициенту термического расширени материала соедин емых кромок, нагревают их до температуры текучести материала в зоне, пм- рина которой превышает ширину сварного шва на 0,6-0,8 толщины кромки. При этом одновременно охлаждают остальную часть зажатой соедин емой кромки до температуры на 50-60 С ниже температуры разм гчени материала. После предварительной термообработки соедин емые кромки охлаждают. 3 ил.,. 1 табл. i (ЛThe invention relates to the welding of plastics, in particular to methods of joining thermoplastic oriented materials. The goal is to improve the quality of welding thermoplastic oriented materials. To do this, in the method of joining polymeric materials during the preliminary heat treatment, each of the joined edges is clamped in a rigid mold of a material whose thermal expansion coefficient is at least equal to the thermal expansion coefficient of the material of the joined edges, heated to the pouring temperature of the material in the zone, the thickness of the weld which exceeds the width of the weld by 0.6-0.8. At the same time, the rest of the clamped joint edge is cooled to a temperature 50-60 ° C below the softening temperature of the material. After preliminary heat treatment, the joined edges are cooled. 3 il.,. 1 tab. i (L
Description
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Изобретение относитс к сварке пластмасс, а именно к способам соединени термопластичньк ориентированных материалов.This invention relates to the welding of plastics, in particular to methods of joining thermoplastic oriented materials.
Цель изобретени - повышение качества сварки термопластичньк ориентированных материалов.The purpose of the invention is to improve the quality of welding thermoplastic oriented materials.
На изображена схема операции предварительной термообработки одной из кромок; на фиг,2 - схема операции сварки кромок, расположенных встык; на фиг.З - то же, с разделкой кромок на ус.On the scheme of the operation of preliminary heat treatment of one of the edges; FIG. 2 is a diagram of the operation of butt-welding of edges; on fig.Z - the same, with grooving edges on a mustache.
Способ соединени полимерных ма- териалов заключаетс в следующем,The method of combining polymeric materials is as follows.
Кажд5гю из соедин емых кромок 1 подвергают предварительной термообработке . Дл этого ее помещают между матрицей 2 и пуансоном 3, вл ющимис элементами жесткой пресс-формы, плотно прилегающей к кромке 1 (фиг,1). Материал матрицы 2 и пуансона 3 подбирают так, чтобы имел он коэффициен термического расширени , близкий к коэффициенту термического расширени материала свариваемой кромки. Создают давлешю Р на пресс-форму, например , струбцинами. Давление сжати пресс--формы подбирают так, тобы в дальнейшем исключить изменение конфигурации свариваемой кромки при термообработке.Each of the joined edges 1 is subjected to preliminary heat treatment. To do this, it is placed between the die 2 and the punch 3, which are elements of a rigid mold, tight to the edge 1 (Fig. 1). The material of the matrix 2 and the punch 3 is selected so that it has a thermal expansion coefficient close to the thermal expansion coefficient of the material of the welded edge. Create a mold P on the mold, for example, clamps. The compression pressure of the mold is selected so as to further eliminate the change in the configuration of the weld edge during heat treatment.
Термообработка, проводима в по- сто нйсЛ по конфигурации в процессе термообработки жесткой и выполненной из материала, коэффициент термического рас нреви которого близок к коэффициенту термического расширени материала кромки, пресс-форме, плотно прилегакицей. к свариваемой кромке, позвол ет искл1вчить изменение формы кромки.Heat treatment is carried out at standing on the configuration of the heat treatment process hard and made of a material whose coefficient of thermal decomposition is close to the coefficient of thermal expansion of the material of the edge, the mold is tightly fitting. to the edge to be welded, eliminates the change in the shape of the edge.
Давление Р, преп тствующее усадке зависит от степени ориентации материала кромки и в каждом конкретном слзгчае подбираетс экспериментально.The pressure P that prevents shrinkage depends on the degree of orientation of the material of the edge and in each particular case is selected experimentally.
Включив нагревательные элементы 4, нагревают свариваемую кромку 1 в зоне L шириной а, превышающей ширину b сварного шва на 0,6-0,8 толщины S свариваемой кромки, до температуры текучести материала.Turning on the heating elements 4, heat the weld edge 1 in the zone L with width a greater than the width b of the weld by 0.6-0.8 of the thickness S of the weld edge to the pour point of the material.
Термообработка свариваемой кромки с нагревом до температуры текзгчести материала в зоне шириной, превышающей ширину сварного шва на 0,6-0,8 толщины свариваемой кромки, вл етс оптимальной зоной дезориентации, такHeat treatment of the edge being welded with heating up to the material's temperature of material in a zone with a width greater than the width of the weld by 0.6-0.8 times the thickness of the edge being welded is an optimal disorientation zone.
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как увеличение зоны дезориентации кромки на величину менее 0,6 толщины свариваемого материала сильно затрудн ет гфоведение процесса сварки без дезориентации зон А и В, что ведет к снижению качества сварки за счет внутренних напр жений в шве и за счет усадочных влений материала кромки. Увеличение зоны L более 0,8 ведет к необоснованному увеличению зоны дезориентации детали, а в случае удалени части дезориентированного материала механической обработкой приводит к увеличению расхода материала без увеличени прочности сварного соединени .As an increase in the edge disorientation zone by less than 0.6 of the thickness of the material being welded, the welding behavior of the welding process is very difficult without disorienting zones A and B, which leads to a decrease in the quality of welding due to internal stresses in the seam and due to shrinkage of the edge material. Increasing the L zone by more than 0.8 leads to an unjustified increase in the zone of disorientation of the part, and in case of removing a part of the disoriented material by machining, it leads to an increase in material consumption without increasing the strength of the welded joint.
Как показали эксперименты, в случае сварки ориентированного стекла предварительна обработка при температуре текучести материала кромки позвол ет провести дезориентацию : , кромки и сн ть внутренние напр жени , св занные с ориентацией материала.As experiments have shown, in the case of welding of oriented glass, pretreatment at the temperature of fluidity of the material of the edge makes it possible to conduct disorientation: edges and relieve internal stresses associated with the orientation of the material.
Одновременно с включением нагревательных элементов 4 включают охлаж дак цие элементы 5, которые осущест- вл ют охлаждение остальной части зажатой соедин емой кромки до температуры на 50-60 С ниже температуры разм гчени материала.Simultaneously with the inclusion of the heating elements 4, the elements 5 are cooled, which cool down the rest of the clamped joined edge to a temperature 50-60 ° C below the softening temperature of the material.
Измен электрический ток в нагревательных элементах 4 и количество охлаждаклцей жидкости, проход щей через охлаждающие элементы 5, устанавливают необходимую ширину зоны L.By varying the electric current in the heating elements 4 and the amount of cooling liquid passing through the cooling elements 5, set the required width of zone L.
Дл определени .ширины зоны L, имеющей температуру текучести материала свариваемой кромки 1j можно пользоватьс , например, термопарами (не показаны), которые помещают в узкие прорези, перпендикул рные кромке опытных образцов.To determine the width of zone L, which has the temperature of fluidity of the material of the welded edge 1j, it is possible to use, for example, thermocouples (not shown), which are placed in narrow slots perpendicular to the edge of the test specimens.
При изменении количества охлаждающей жидкости необходимо следить за тем, чтобы температура свариваемой кромки 1 в зоне В, выход щей из пресс- формы, была ниже на 50-60 С температуры разм гчени материала.When changing the amount of coolant, it is necessary to ensure that the temperature of the weld edge 1 in zone B coming out of the mold is 50–60 ° C lower than the softening temperature of the material.
Термообработка кромок с одновременным охлаждением с5 :тальиой части зажатой свариваемой кромки до температуры на 50-60 С ниже температуры разм гчени -позвол ет исключить дезориентацию незажатой кромки и исключить коробление кромки в случае неравномерного охлаждени верхней и нижней поверхностей кромок.Heat treatment of edges with simultaneous cooling of a C5: the waist of a part of the clamped welded edge to a temperature 50-60 ° C below the softening temperature makes it possible to avoid disorientation of the non-pressed edge and to exclude distortion of the edge in case of uneven cooling of the upper and lower surfaces of the edges.
Как показали эксперименты, например при сварке ориентированного органического стекла марки АО-120, снижение температуры зажатой части охлаждаемой кромки менее чем на 50° С по сравнению с температурой разм гчени материала свариваемой кромки увеличивает брак и в процессе термообработки свариваемой кромки, и при последующей ее сварке, а снижение температуры более чем на 60°С ведет к необоснованному увеличению расхода охлаждающей жидкости и мощности нагревательных элементов,Experiments have shown, for example, when welding oriented AO-120 organic glass, that the temperature of the clamped portion of the cooled edge decreases by less than 50 ° C compared to the softening temperature of the material of the welded edge increases the scrap during the heat treatment of the welded edge and subsequent welding , and a decrease in temperature of more than 60 ° C leads to an unreasonable increase in coolant flow and power of heating elements,
Термообработав свариваемую кромку 1, отключают нагревательные элементы и охлаждают свариваемую кромку 1 до комнатной температуры. Отключив охладитель 5, демонтирзпот пресс-форму, извлекают свариваемую кромку 1 и отмечают местоположение охладителей 5, Затем подвергают свариваемую кромку механической обработке, подготавлива ее свариваемую поверхность под сварку, удал окисленный слой и неровности , возникающие при термообработке , за счет незначительной усадки свариваемой кромки 1,Heat-treating the welded edge 1, turn off the heating elements and cool the welded edge 1 to room temperature. Turning off the cooler 5, dismounting the mold, remove the weld edge 1 and mark the location of the coolers 5, Then subject the weld edge to mechanical processing, preparing its welded surface for welding, removing the oxidized layer and irregularities that occur during heat treatment, due to the slight shrinkage of the weld edge 1 ,
Затем производ т установку и фнк- сацию свариваемых кромок 1 относи- . тельно нагревательного электрода 6 (фиг.2) или одна относительно другой (фиГоЗ) с последунщей установкой сварочного электрода 6, Затем размещают охлаждающие элементы 5 на отмеченных ранее участках и производ т сварку. Если сварку производ т по схеме (фиг,2), нагревают свариваемые кромки электродом 6 до температуры сварки, убирают нагревательный электрод , а соедин емые поверхности 7 сдавливают, В случае, когда сварку производ т по другой схеме (фйг,3), сварочное давление прикладывают посThen, the installation and fnxisation of the edges to be welded 1 are carried out. heating electrode 6 (Fig. 2) or one relative to another (FIG. 3) with the subsequent installation of welding electrode 6. Then, the cooling elements 5 are placed on the previously noted areas and are welded. If welding is performed according to the scheme (FIG. 2), the edges to be welded are heated by electrode 6 to the welding temperature, the heating electrode is removed, and the joined surfaces 7 are squeezed. In the case when welding is done by another scheme (fig, 3), welding pressure apply pic
ле отключени нагревательных злектро- цов. .unplugged heating electros. .
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риваемых поверхностей. Можно также исключить дезориентацию во врем сварки, если ув личить расход охлаждающей жидкости в охладительных элементах 5 по сравнению с расходом жидкости при термообработке или расположить охлаждающие элементы 5 на зоне А, Во всех случа х отключение охлаждающих элементов 5 производ т после окончани процесса сварки.surfaces to be drawn. It is also possible to eliminate disorientation during welding by increasing the coolant flow rate in the cooling elements 5 as compared to the liquid consumption during heat treatment or placing the cooling elements 5 in zone A. In all cases, the cooling elements 5 are disconnected after the end of the welding process.
Осуществление сварки на режимах, не допускающих дезориентации оставшихс ориентированных участков А и В, исключает возможность повьппени температуры при сварке зон А и В до температзгры, близкой к температуре разм гчени материала, и тем самым исключаетс возможность образовани напр жени в сварном шве за счет дезориентации соседних ориентированных участков.Welding in modes that prevent disorientation of the remaining oriented sections A and B eliminates the possibility of welding temperature during welding zones A and B to a temperature close to the softening temperature of the material, and thereby eliminating the possibility of stress in the weld due to the disorientation of neighboring oriented plots.
Результаты экспериментов способа приведены в таблице дл полимерного ориентированного материала - органического стекла марки АО-140 с itapa- метрами: степень ориентации 60%, толщина 10 мм, прочность иа разрыв основного материала 7,2 кГ/мм, способ нагрева свариваемых поверхностей контактный, врем нагрева 10 мин, температура сварки 260 с, сварочное давление 10 кГ/см, тeмпepaтyI a термообработки 195-220 С, врем термообработки 2 ч. Сжатие пресс-формы производ т струбцинами, свариваемые кромки охлаждают при температуре 80es c .The results of the experiments of the method are given in the table for a polymer oriented material - organic glass AO-140 with itapa-meters: orientation degree 60%, thickness 10 mm, strength and rupture of the base material 7.2 kg / mm, the method of heating the welded surfaces is contact, time heating 10 minutes, welding temperature 260 s, welding pressure 10 kg / cm, heat treatment temperature 195-220 ° C, heat treatment time 2 hours. Compression of the mold is made by clamps, the edges being welded are cooled at a temperature of 80es c.
JQ Jq
4040
JQ Jq
4545
Чтобы в процессе сварки не происходила дезориентаци оставшихс ори- . ентированных или частично дезориенти-,-. рованных зон, соответственно В и А, дл этого необходимо, найример, перед включением нагревательного электрода 6 включить охлаждакнцие элементы 5, размещенные в отмеченных ранее местах и охладить расположенные между ними участки (по толщине свариваемых кромок) до температуры ниже комнатной и после этого производить, нагрев сва55In order to avoid disorientation of the remaining ori- gens during the welding process. or partly disorienting -, -. for this, it is necessary, we recommend, to switch on the heating electrode 6, turn on the cooling elements 5 placed in the previously noted places and cool the areas between them (along the thickness of the edges to be welded) to a temperature below room temperature and then produce heating sva55
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874253182A SU1442419A1 (en) | 1987-03-31 | 1987-03-31 | Method of joining polymeric materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874253182A SU1442419A1 (en) | 1987-03-31 | 1987-03-31 | Method of joining polymeric materials |
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| Publication Number | Publication Date |
|---|---|
| SU1442419A1 true SU1442419A1 (en) | 1988-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874253182A SU1442419A1 (en) | 1987-03-31 | 1987-03-31 | Method of joining polymeric materials |
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| Country | Link |
|---|---|
| SU (1) | SU1442419A1 (en) |
-
1987
- 1987-03-31 SU SU874253182A patent/SU1442419A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР W 1184696, кл. В 29 С 65/02, 1984. Трост нска Е.Б. и др. Сварка пластмасс, М.: Машиностроение, 1967, с.74 и 99. * |
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