摘要:
For joining two faces (41, 42) of thermoplastics in a penetration beam welding method the covered face (42) is multiply scanned and thus incremently heated by a laser beam (10) directed through the covering face (41). This preheating is repeated until the melting temperature is attained. In the region of the covered face (42) a melt thus materializes simultaneously over the full seam length which wets the covering face (41) and thus also transfers this face into melt by heat conduction. On completion of material softening the faces (41, 42) are mutually moved until abutting. Thus the two faces (41, 42) weld in principle as if they had been plasticized simultaneously over the full seam length which significantly enhances the seal and strength of the seam, whilst the expenditure the apparatus is low.
摘要:
In a method and an apparatus for irradiation welding of two thermoplastic components, a local temperature maximum, which circulates together with the laser beam and increases from cycle to cycle, and a correspondingly circulating, locally increased clamping pressure are generated in the area of joining.
摘要:
A joining method directs polychromate, non-coherent electromagnetic radiation (14) through a radiation transmitting material (16) to an absorbing material (18) that absorbs the radiation with the generation of heat. The heat is used to heat a bond line (20) formed from the transmitting material (16) and a substrate (18) sufficiently to bond the transmitting material (16) and substrate (18). A radiation filter (22) of the same material as the transmitting material is used to reduce effectively unwanted absorption (and heat) in the transmitting material (16). Radiation focusing, masking, transmitting plastic cooling, bond line component drying, double pass welding, and additional bond line pressure are used to improve the bond of the resulting manufacture. A moving double radiation source units improves welding speed at least 5-6 times that of a moving single radiation source unit.
摘要:
A process for making a crosslinked assembly includes steps of: selecting a desired performance parameter for a molded assembly of a first polymeric component and a second polymeric component bonded to the first polymeric component, controlling a first crosslinking percentage for the first polymeric component and a second crosslinking percentage for the second polymeric component independently to provide the desired performance parameter for the assembly, orienting the assembly at an angle between an orientation axis of the assembly and a electron beam direction, exposing the oriented assembly a predetermined number of times (N) to the electron beam operable to deliver a predetermined amount of radiation (R) in the electron beam direction providing a total radiation exposure proportional to (N×R) providing the first component crosslinking percentage and the second component crosslinking percentage, the resulting assembly having the desired performance parameter.
摘要:
A process for making a crosslinked assembly includes steps of: selecting a desired performance parameter for a molded assembly of a first polymeric component and a second polymeric component bonded to the first polymeric component, controlling a first crosslinking percentage for the first polymeric component and a second crosslinking percentage for the second polymeric component independently to provide the desired performance parameter for the assembly, orienting the assembly at an angle between an orientation axis of the assembly and a electron beam direction, exposing the oriented assembly a predetermined number of times (N) to the electron beam operable to deliver a predetermined amount of radiation (R) in the electron beam direction providing a total radiation exposure proportional to (N×R) providing the first component crosslinking percentage and the second component crosslinking percentage, the resulting assembly having the desired performance parameter.
摘要:
In a method and an apparatus for irradiation welding of two thermoplastic components, a local temperature maximum, which circulates together with the laser beam and increases from cycle to cycle, and a correspondingly circulating, locally increased clamping pressure are generated in the area of joining.
摘要:
In order to provide a method for heating an object (102) that is simple to perform and makes it possible to heat an object (102) efficiently and reliably, it is proposed that the method should include the following: providing an object (102) to be heated; applying at least one energy beam (108, 109) to the object (102) to be heated, wherein at least one energy beam (108) is guided over the object (102) to be heated multiple times, along a predetermined intended heating path (114), and this heats the object (102) along the intended heating path (114); determining a temperature distribution over the intended heating path (114), for identifying one or more deviation points (120) at which an actual local temperature differs from an expected and/or calculated temperature; changing and/or supplementing the application of at least one energy beam (108, 109) in order to compensate for the temperature difference at one or more deviation points (120).
摘要:
A process for making a crosslinked assembly includes steps of: selecting a desired performance parameter for a molded assembly of a first polymeric component and a second polymeric component bonded to the first polymeric component, controlling a first crosslinking percentage for the first polymeric component and a second crosslinking percentage for the second polymeric component independently to provide the desired performance parameter for the assembly, orienting the assembly at an angle between an orientation axis of the assembly and a electron beam direction, exposing the oriented assembly a predetermined number of times (N) to the electron beam operable to deliver a predetermined amount of radiation (R) in the electron beam direction providing a total radiation exposure proportional to (N×R) providing the first component crosslinking percentage and the second component crosslinking percentage, the resulting assembly having the desired performance parameter.
摘要:
A plastic joining method directs polychromate, non-coherent electromagnetic radiation through a transmitting plastic to an absorbing material that absorbs the radiation with the generation of heat. The heat is used to heat a bond line formed from the transmitting plastic and a substrate sufficiently to bond the transmitting plastic and substrate. A radiation filter of the same material as the transmitting plastic is used to reduce effectively unwanted absorption (and heat) in the transmitting plastic. Radiation focusing, masking, transmitting plastic cooling, bond line component drying, double pass welding, and additional bond line pressure are used to improve the bond of the resulting manufacture.