JP2843894B2 - How to connect plastic tubes - Google Patents
How to connect plastic tubesInfo
- Publication number
- JP2843894B2 JP2843894B2 JP3240456A JP24045691A JP2843894B2 JP 2843894 B2 JP2843894 B2 JP 2843894B2 JP 3240456 A JP3240456 A JP 3240456A JP 24045691 A JP24045691 A JP 24045691A JP 2843894 B2 JP2843894 B2 JP 2843894B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heating wire
- plastic
- plastic pipe
- joint
- 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.)
- Expired - Lifetime
Links
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
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- 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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- 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
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap 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
- B29C66/01—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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
-
- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
-
- 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
- B29C66/50—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
- B29C66/5229—Joining tubular articles involving the use of a socket
-
- 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
- B29C66/5229—Joining tubular articles involving the use of a socket
- B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
- B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
- B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
- B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
- B29C66/91655—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
- B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
-
- 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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
- B29C66/91311—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating
- B29C66/91317—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating by measuring the electrical resistance
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
- B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
- B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えばポリエチレン製
等のプラスチック管同志をプラスチック管継手を用い該
管継手をプラスチック管に溶着させることにより接続す
るプラスチック管の接続方法に関する。The present invention relates to, for example polyethylene
The present invention relates to a method for connecting plastic pipes by connecting plastic pipes to each other by using a plastic pipe joint and welding the pipe joint to the plastic pipe.
【0002】[0002]
【従来の技術】従来、プラスチック管継手の内周部に電
熱線を埋込むと共に、この電熱線の両端部にコネクタピ
ンを接涜したプラスチック管継手を用いて、これに通電
することにより該プラスチック管継手を溶融させ、プラ
スチック管同士を接続するようにしたものが知られてい
る(例えば、特開平1−114419号公報)。Conventionally, electrostatic the inner peripheral portion of the plastic pipe fittings
Embed the heating wire and connect the connector pins to both ends of the heating wire.
Energize this with plastic pipe fittings
In this case, the plastic pipe joint is melted to connect the plastic pipes to each other (for example, JP-A-1-114419).
【0003】この種のものは、プラスチック管継手の両
端に接続すべき一対のプラスチック管を挿入した後、コ
ネクタピンを介して電熱線に電流を流して該電熱線を発
熱させることによりプラスチック管継手を溶融させてプ
ラスチック管同士を接続するようにしたものである。こ
の時、電圧または電流をプラスチック管継手の各サイズ
とも一定にしておき、接続するプラスチック管とプラス
チック管継手の周囲温度によって通電時間を設定する方
法が一般に採られている。[0003] In this type of plastic pipe joint, a pair of plastic pipes to be connected are inserted into both ends of a plastic pipe joint, and then a current is applied to a heating wire through a connector pin to cause the heating wire to generate heat. Is melted to connect the plastic tubes to each other . At this time, leave a constant voltage or current respectively, and each of the plastic fittings, plastic tube and positive connecting
A method of setting the energizing time according to the ambient temperature of the tick pipe joint is generally adopted.
【0004】しかしながら、プラスチック管継手及びプ
ラスチック管の温度と周囲温度が異なる場合、電熱線の
電気抵抗誤差や通電の電流または電圧が変動した場合、
或いはプラスチック管外径とプラスチック管継手内径の
寸法誤差に基づくクリアランスの大小の影響がある場合
等、最適な通電時間の設定が困難であった。[0004] However, when the temperature of the plastic pipe joint and the plastic pipe is different from the ambient temperature, when the electric resistance error of the heating wire or the current or voltage of energization fluctuates,
Or, it is difficult to set an optimal energizing time when there is an influence of the magnitude of the clearance based on the dimensional error between the outer diameter of the plastic pipe and the inner diameter of the plastic pipe joint .
【0005】このため、図6に示すように、接続すべき
一対のプラスチック管1,1の端部を挿入するプラスチ
ック管継手2の内部に該プラスチック管継手2の温度を
測定する感温センサ3を装着しておき、プラスチック管
継手2の内周面に埋め込んだ電熱線4にコントローラ5
からコネクタ6,6及びコネクタピン7,7を介して所
定の電流を流して加熱した時に生じるプラスチック管継
手2の温度を前記感温センサ3で検出し、プラスチック
管継手2の温度が所定の温度に達した時に前記電熱線4
への通電を停止するようにしたものが開発されている
(例えば、特開昭63−99927号公報及び特開昭6
0−198224号公報等参照)。For this reason, as shown in FIG. 6, the temperature of the plastic pipe joint 2 is measured inside the plastic pipe joint 2 into which the ends of the pair of plastic pipes 1 and 1 to be connected are inserted. The temperature sensor 3 is mounted, and the heating wire 4 embedded in the inner peripheral surface of the plastic fitting 2 is connected to the controller 5.
A temperature of the plastic fitting 2 generated when a predetermined current flows through the connector 6 and 6 and the connector pins 7 and 7 and heated is detected by the temperature sensor 3, and the temperature of the plastic fitting 2 becomes a predetermined temperature. When the heating wire 4
There have been developed ones in which the power supply to the power supply is stopped (see, for example, JP-A-63-99927 and JP-A-6-99927).
0-198224).
【0006】また、図示しないが、前記感温センサをプ
ラスチック管継手の2カ所に装着しておき、両者の平均
値が所定の温度に達した時に電熱線への通電を停止する
ようにしたものも開発されている。Although not shown , the temperature sensor is mounted at two locations of the plastic pipe joint, and when the average value of the two reaches a predetermined temperature, the power supply to the heating wire is stopped. Has also been developed.
【0007】[0007]
【発明が解決しようとする課題】しかしながら、上記従
来例にあっては、前者ではプラスチック管継手と周囲温
度が異なる場合やプラスチック管の外径とプラスチック
管継手の内径の寸法誤差に基づくクリアランスの大小の
影響がある場合等、最適な通電時間の設定が困難であっ
た。 また後者では感温センサに接続ミス等があると、プ
ラスチック管継手が所定の温度に達してもこれを検出す
ることができなかったり、検出するまでに時間がかかり
過ぎ、電流が長時間流れてプラスチック管継手が軟化し
てしまうといった問題があった。However, in the above-mentioned conventional example, in the former case, the plastic pipe joint and the ambient temperature
If the degree is different or the outer diameter of the plastic tube and the plastic
The size of the clearance based on the dimensional error of the inner diameter of the pipe joint
It is difficult to set the optimal energizing time when
Was. In the latter case, if there is a connection error or the like in the temperature sensor, even if the plastic fitting reaches a predetermined temperature, it cannot be detected, or it takes too long to detect, and the current flows for a long time. There was a problem that the plastic pipe joint was softened.
【0008】本発明は上記に鑑み、プラスチック管継手
が所定の温度に達したことを確実に検出して、電熱線へ
の通電を停止できるようにしたものを提供することを目
的とする。SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an apparatus which can reliably detect that a plastic pipe joint has reached a predetermined temperature and can stop energizing a heating wire.
【0009】[0009]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は、内周部に電熱線を埋め込んだプラスチッ
々管継手内にプラスチック管の端部を挿入し、管継手に
設けた温度測定用穴に感温センサを挿入して前記電熱線
への通電時におけるプラスチック管継手の温度を測定
し、この測定温度が設定温度に達した時に通電を停止さ
せるプラスチック管の接続方法において、前記電熱線へ
通電する前に、プラスチック管継手の温度を測定し、こ
の温度の変化が大きいか否かを判断し、この温度変化が
小さくなったときの温度を継手の初期温度として検出
し、この検出した初期温度によって通電完了温度を設定
し、前記電熱線への通電時におけるプラスチック管継手
の温度を少なくとも継手の2ヶ所以上に亘って測定し、
この測定値のうちのいずれかが先に設定した通電完了温
度に達したときに通電を停止させることを特徴とするも
のである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to insert an end of a plastic pipe into a plastic pipe joint in which a heating wire is embedded in an inner peripheral portion, and insert the plastic pipe into the pipe joint.
Insert a temperature sensor into the provided temperature measurement hole and measure the temperature of the plastic pipe joint when energizing the heating wire.
And, in the connection method for a plastic tube to stop energization when the measured temperature has reached the set temperature, to the heating wire
Before turning on the power, measure the temperature of the plastic
Judge whether the temperature change is large or not.
Detects the temperature at which the temperature has decreased as the initial temperature of the joint
Then, the energization completion temperature is set based on the detected initial temperature.
And measuring the temperature of the plastic pipe joint when energizing the heating wire over at least two places of the joint ,
When any one of the measured values reaches the previously set energization completion temperature, the energization is stopped.
【0010】[0010]
【作用】本発明によれば、通電前の継手の初期温度検出
を温度変化が収束するのを待って検出しているので、温
度センサ自体の熱の影響や継手周囲の熱の影響をなくし
て確実な継手の初期温度を検出し、この検出した継手の
初期温度に基づいて通電完了温度が設定される。そして
電熱線への通電時に、複数個所に亘って測定される管継
手の温度の内、先に設定された通電完了温度に達した時
点で電熱線への通電が停止される。このため、継手への
感温センサ接続不良等による不良検出値を除いて、正確
に検出された継手温度に基づいて通電制御が行われ、周
囲温度の影響や電熱線の電気抵抗誤差、通電電流及び通
電電圧が変動した場合、あるいは継手の内径と管の外径
間のクリアランス大小等、融着時の種々の条件に関係な
く正確な通電制御による最適な融着が行われる。 According to the present invention, the initial temperature of a joint before energization is detected.
Is detected waiting for the temperature change to converge.
Eliminates the effects of the heat of the temperature sensor itself and the heat around the joint.
Detects the initial temperature of the joint
The energization completion temperature is set based on the initial temperature. And
When the heating wire is energized, pipe joints are measured at multiple locations.
When the power supply completion temperature set in the hand temperature is reached
At the point, energization of the heating wire is stopped. For this reason,
Except for failure detection value due to poor connection of temperature sensor, etc.
Energization control is performed based on the joint temperature detected at
Influence of ambient temperature, electric resistance error of heating wire,
If the electric voltage fluctuates, or the inner diameter of the fitting and the outer diameter of the pipe
Related to various conditions during fusion, such as the clearance between
Optimal welding is performed by precise and accurate energization control.
【0011】[0011]
【実施例】以下、本発明の一実施例を図1乃至図5を参
照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.
【0012】図1において、接続すべきプラスチック管
1,1の端部を挿入するプラスチック管継手2の内周面
には、通電することにより該プラスチック管継手2を溶
融させる電熱線4が螺旋状に巻いた状態で埋込まれ、こ
の電熱線4の両端には、コネクタピン7,7が接続され
ている。そして、このコネクタピン7,7にコントロー
ラ5のコネクタ6,6を接続することにより、電熱線4
へ通電してこれを発熱させ、この電熱線4の発熱により
プラスチック管継手2をプラスチック管1,1に融着さ
せて該プラスチック管1,1を接続する。このとき、こ
の電熱線4への通電時におけるプラスチック管継手2の
温度を2つの感温センサ3,3で測定する。In FIG. 1, a heating wire 4 for melting the plastic pipe joint 2 by applying a current is spirally formed on the inner peripheral surface of the plastic pipe joint 2 into which the ends of the plastic pipes 1 and 1 to be connected are inserted. The connector pins 7 are connected to both ends of the heating wire 4. By connecting the connectors 6 and 6 of the controller 5 to the connector pins 7 and 7,
The plastic pipe joint 2 is fused to the plastic pipes 1 and 1 by the heat generated by the heating wire 4 and the plastic pipes 1 and 1 are connected . At this time, the temperature of the plastic pipe joint 2 when the heating wire 4 is energized is measured by the two temperature sensors 3 and 3.
【0013】即ち、プラスチック管継手2のコネクタピ
ン7,7に近接した外周面には、2つの測定用穴2a,
2aが設けられ、一方、コントローラ5のコネクタ6,
6をコネクタピン7,7に接続したときに前記測定用穴
2a,2aには、電熱対で構成した感温センサ3,3が
備えられている。That is, on the outer peripheral surface of the plastic pipe joint 2 near the connector pins 7, 7, two measurement holes 2a,
2a, while connectors 6, 6 of the controller 5 are provided.
The measuring hole when connecting the 6 to connector pins 7,7
2a, 2a are provided with temperature-sensitive sensors 3, 3 each formed by an electric thermocouple.
【0014】これにより、電熱線4への通電と同時に2
つの感温センサ3,3でプラスチック管継手2の温度を
測定するのであるが、この時、両感温センサ3,3での
測定値のうちのいずれかがコントローラ5に予め設定さ
れている設定温度に達した時には電熱線4への通電を停
止する。[0014] Thereby, simultaneously with energizing the heating wire 4,
The temperature of the plastic pipe joint 2 is measured by the two temperature sensors 3, 3. At this time, one of the measured values of the two temperature sensors 3, 3 is set in the controller 5 in advance. When the temperature reaches the temperature, the power supply to the heating wire 4 is stopped.
【0015】このように、感温センサ3,3でプラスチ
ック管継手2の温度を測定し、一方の測定値が設定温度
に達した時に電熱線4への通電を停止することにより、
最適通電時間の設定の困難性を解消するとともに、一つ
の感温センサ3に接続ミスがあるときにおける電流の流
れ過ぎを防止することができる。As described above, the temperature of the plastic pipe joint 2 is measured by the temperature-sensitive sensors 3 and 3, and when one of the measured values reaches the set temperature, the energization of the heating wire 4 is stopped.
It is possible to eliminate the difficulty of setting the optimal energizing time and to prevent excessive current flow when one temperature-sensitive sensor 3 has a connection error.
【0016】即ち、図2に示すように、外気温度の相違
により最適な通電時間が異なるが、設定温度を一定(例
えば、135℃)にしておき、感温センサ3,3による
測定温度がこの設定温度に達した時に電熱線4への通電
を停止させることにより、外気温度に応じた通電時間の
補正を行うことができ、これによって、通電時間の設定
の困難性が解消される。That is, as shown in FIG. 2, although the optimum energization time varies depending on the outside air temperature, the set temperature is kept constant (for example, 135 ° C.), and the temperature measured by the temperature-sensitive sensors 3 By stopping the energization to the heating wire 4 when the set temperature is reached, the energization time can be corrected according to the outside air temperature, thereby eliminating the difficulty of setting the energization time.
【0017】また、図3に示すように、どちらか一方の
感温センサ3に接続ミス等があって、この温度上昇が一
点鎖線で示すように遅れて設定温度に達しなくても、こ
の影響を受けることなく、正常に接続された他方の感温
センサ3でプラスチック管継手2が確実に設定温度に達
したことを検知して電熱線4への通電を停止させるの
で、これによって高精度の制御を行うことができる。As shown in FIG. 3, even if one of the temperature sensors 3 has a connection error or the like, and this temperature rise does not reach the set temperature with a delay as shown by a dashed line, the influence is not affected. Without receiving any electric current, the other temperature sensor 3 connected normally detects that the plastic fitting 2 has reached the set temperature without fail and stops the supply of electric power to the heating wire 4. Control can be performed.
【0018】このときのフローチャートを図4及び図5
により説明する。The flowchart at this time is shown in FIGS.
This will be described below.
【0019】先ず、電源をONにより時間表示をリセッ
トするとともに取付ランプをONにする。そして、2個
のコネクター6,6を継手本体2のコネクターピン7,
7に接続するとコネクター取付ランプがOFFし、通電
接続ランプがONする。 First, when the power is turned on, the time display is reset and the mounting lamp is turned on. And two
Connectors 6 and 6 of the connector body 2
When connected to 7, the connector mounting lamp is turned off and the power is turned on.
The connection lamp turns on.
【0020】次に、通電ボタンをONにして通電ランプ
を点滅させ、感温センサ3,3に断線があるか否かを判
定し、断線があった場合には、異常ランプと高音ブザー
を共にONにして出力をOFFにする。また、温度変化
が大きいか否かを判断し、温度変化が小になるまで待機
される。すなわち温度変化が大のときはセンサ断線の有
無と温度変化の判断が繰返される。これが小さくなった
ら初期温度を検出するとともに通電完了温度(設定温
度)を設定し、メモリに格納される。これは、センサ
3,3の温度が前回の融着作業で受けた熱の影響で実際
の継手の温度よりも高い温度に検出するのを防止するた
めで、間違った継手の初期温度により通電完了温度(設
定温度)が異なるからである。Next, the energizing button is turned on to blink the energizing lamp, and it is determined whether or not the temperature sensors 3 and 3 are disconnected. If there is a disconnection, both the abnormal lamp and the high-pitched buzzer are turned off. Turn ON and output OFF. Also, judge whether the temperature change is large or not and wait until the temperature change becomes small.
Is done. That is, if the temperature change is large, the sensor
The determination of nothing and a temperature change is repeated. This has become rather small
Then, the initial temperature is detected, and the energization completion temperature (set temperature) is set and stored in the memory. This is a sensor
The temperature of 3,3 is actually affected by the heat received in the previous welding operation
To prevent detection at temperatures higher than the joint temperature.
This is because the current completion temperature (set temperature) differs depending on the wrong initial temperature of the joint .
【0021】そして、出力をONにし、時間カウンタ、
通電ランプ及び低音ブザーを共にONにした後、感温セ
ンサ3,3に断線があるか否か、電熱線にショートがあ
るか否か、出力電圧に異常があるか否か、昇温に異常が
あるか否かを順次判断し、これらがあった場合には、異
常ランプと高音ブザーを共にONにして出力をOFFに
する。そして、リセットボタンがONになっていないこ
とを条件として、2個の感温センサ3,3のうちの一方
が設定温度(完了温度)に達した時には、出力をOFF
にする。Then, the output is turned on, and a time counter,
After turning on both the energizing lamp and the low-pitched buzzer, whether or not the temperature sensors 3 and 3 are disconnected, whether or not the heating wire is short-circuited, whether or not the output voltage is abnormal, and whether or not the temperature rises It is sequentially determined whether or not there is, and if they are present, the abnormal lamp and the high-pitched sound buzzer are both turned on and the output is turned off. When one of the two temperature sensors 3 and 3 reaches a set temperature (completion temperature) on condition that the reset button is not turned on, the output is turned off.
To
【0022】次に、回路及び通電ランプを共にOFFに
して、低音ブザーをOFF、冷却ランプをONにする。
そして、出力OFFから55秒経過した後に、継手を取
外し、継手取外ランプ及び接続ランプを共にOFFにし
た後に、異常ランプ、高音ブザー及び冷却ランプを共に
OFFにしてプラスチック管1,1の接続作業を完了す
る。ここに、出力OFFから55秒経過していない時
で、継手を取外していない時には、リセットボタンがO
Nになっていることを条件として、異常ランプ、高音ブ
ザーを共にOFFにして55秒経過することを待つ。Next, the circuit and the energizing lamp are both turned off, the bass buzzer is turned off, and the cooling lamp is turned on.
After 55 seconds have passed since the output was turned off, the joint was removed, the joint removal lamp and the connection lamp were both turned off, and then the abnormal lamp, treble buzzer and cooling lamp were both turned off to connect the plastic pipes 1 and 1. Complete. Here, when 55 seconds have not passed since the output was turned off and the joint was not removed, the reset button
Under the condition that N has been reached, both the abnormal lamp and the high-pitched sound buzzer are turned off, and wait for 55 seconds to elapse.
【0023】なお、上記実施例においては、感温センサ
3,3として熱電対を使用した例を示しているが、サー
ミスタや温度抵抗体を使用することもでき、また、温度
センサ3の数は、2個以上であればいくつでも良いこと
は勿論である。In the above embodiment, a thermocouple is used as each of the temperature sensors 3 and 3. However, a thermistor or a temperature resistor can be used. Of course, any number of two or more may be used.
【0024】[0024]
【発明の効果】以上の説明から明らかなように、本発明
によれば、従来の通電時間設定の困難さを解消して、継
手の通電完了温度が継手以外の他の熱の影響を除いて正
しく設定され、しかも通電中の継手の温度を複数個所に
亘って測定し、先に設定温度に達した検出値に基づいて
通電制御が行われるので、継手へのセンサ接続不良等、
融着時の種々の条件による不良検出値を除いて正確に検
出された温度でもって通電制御が行われるので、最適な
しかも正確な融着が行われる。 As is apparent from the above description, according to the present invention, it is possible to eliminate the difficulty of setting the conventional energizing time, and
Excitation temperature of the hand is correct except for the effect of heat other than the joint.
The temperature of the joint during energization is set at multiple locations.
Measured over time and based on the detected value that reached the set temperature first
Since energization control is performed, such as sensor connection failure to the joint,
Accurate inspection except for defective detection values due to various conditions during fusion
Since the energization control is performed at the output temperature,
Moreover, accurate fusion is performed.
【図1】本発明の一実施例の説明に付する縦断面図であ
る。FIG. 1 is a longitudinal sectional view for explaining one embodiment of the present invention.
【図2】外気温度の相違に基づく感温センサと通電時間
の関係を示すグラフである。FIG. 2 is a graph showing a relationship between a temperature sensor based on a difference in outside air temperature and an energization time.
【図3】一方の感温センサに異常があった場合の感温セ
ンサ温度と通電時間の関係を示すグラフである。[Figure 3] temperature-sensitive cell when there is an abnormality in one temperature-sensitive sensor
6 is a graph showing a relationship between a sensor temperature and a current supply time.
【図4】図1におけるフローチャートである。FIG. 4 is a flowchart in FIG. 1;
【図5】図1におけるフローチャートである。FIG. 5 is a flowchart in FIG. 1;
【図6】従来例を示す図1相当図である。FIG. 6 is a diagram corresponding to FIG. 1 showing a conventional example.
1 プラスチック管 2 プラスチック管継手 3 感温センサ 4 電熱線 5 コントローラDESCRIPTION OF SYMBOLS 1 Plastic pipe 2 Plastic pipe joint 3 Temperature sensor 4 Heating wire 5 Controller
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) F16L 47/02──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) F16L 47/02
Claims (1)
ク管継手内にプラスチック管の端部を挿入し、管継手に
設けた温度測定用穴に感温センサを挿入して前記電熱線
への通電時におけるプラスチック管継手の温度を測定
し、この測定温度が設定温度に達した時に通電を停止さ
せるプラスチック管の接続方法において、前記電熱線へ
通電する前に、プラスチック管継手の温度を測定し、こ
の温度の変化が大きいか否かを判断し、この温度変化が
小さくなったときの温度を継手の初期温度として検出
し、この検出した初期温度によって通電完了温度を設定
し、前記電熱線への通電時におけるプラスチック管継手
の温度を少なくとも継手の2ヶ所以上に亘って測定し、
この測定値のうちのいずれかが先に設定した通電完了温
度に達したときに通電を停止させることを特徴とするプ
ラスチック管の接続方法。1. An end portion of a plastic pipe is inserted into a plastic pipe joint in which a heating wire is embedded in an inner peripheral portion thereof, and the heat pipe is inserted into the pipe joint.
Insert a temperature sensor into the provided temperature measurement hole and measure the temperature of the plastic pipe joint when energizing the heating wire.
And, in the connection method for a plastic tube to stop energization when the measured temperature has reached the set temperature, to the heating wire
Before turning on the power, measure the temperature of the plastic
Judge whether the temperature change is large or not.
Detects the temperature at which the temperature has decreased as the initial temperature of the joint
Then, the energization completion temperature is set based on the detected initial temperature.
And measuring the temperature of the plastic pipe joint when energizing the heating wire over at least two places of the joint ,
A method of connecting a plastic pipe, wherein the current supply is stopped when any one of the measured values reaches the previously set power supply completion temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3240456A JP2843894B2 (en) | 1991-08-27 | 1991-08-27 | How to connect plastic tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3240456A JP2843894B2 (en) | 1991-08-27 | 1991-08-27 | How to connect plastic tubes |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8085715A Division JP2828425B2 (en) | 1996-03-14 | 1996-03-14 | How to connect plastic tubes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0560287A JPH0560287A (en) | 1993-03-09 |
JP2843894B2 true JP2843894B2 (en) | 1999-01-06 |
Family
ID=17059770
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JP3240456A Expired - Lifetime JP2843894B2 (en) | 1991-08-27 | 1991-08-27 | How to connect plastic tubes |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63195493A (en) * | 1987-02-09 | 1988-08-12 | 三菱樹脂株式会社 | Pipe joint |
-
1991
- 1991-08-27 JP JP3240456A patent/JP2843894B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0560287A (en) | 1993-03-09 |
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