摘要:
A specially designed sonotrode and anvil are adapted to be used in combination for ultrasonic welding of work pieces, to produce a narrower weld region, but one exhibiting greater durability, thereby permitting use of less packaging material. The contact surfaces comprise a surface of the anvil having a plurality of energy directors, where the plurality of energy directors are arranged into a three-dimensional grid pattern to be capable of distributed vibration-transmissive contact. The energy directors may comprise a series of plateau surfaces being regularly spaced apart from each other in a first direction, and in a second direction that is orthogonal to the first direction, to form the grid pattern. The rectangular-shaped plateaus may be spaced apart by valleys. Engagement of the energy directors of the anvil with the corresponding surface of the sonotrode may cause minor elastic deformation of work pieces positioned therebetween prior to ultrasonic welding.
摘要:
A continuous rotary filling and packaging machine covers a container body with a molded lid and ultrasonically seals the container body. The molded lid to produce a sealed container includes a lid detecting device 70 disposed on the downstream side of the lid supplying device 60 and an ultrasonic sealing device 100 including lifting and lowering means including a cam mechanism for lifting and lowering a container table 103. The lifting and lowering means is configured such that the molded lid on the container body and a seal working surface of an ultrasonic horn 108 come into press-contact with each other at a top dead point of the container table. A container table lowering control mechanism does not lift, to the top dead point, a container table of a container whose container body does not have the molded lid placed thereon or properly placed thereon as determined.
摘要:
A process for closing mesh bags, in which a longitudinal portion of constricted mesh is compressed together with a portion of at least one plastic strip provided with a width greater than that of the constricted mesh such that respective side bands of the strip project on both sides of the constricted mesh, includes the operations of introducing in a die the compressed longitudinal portions of strip and mesh such that the mentioned side bands are bent towards the constricted mesh. The bent side bands of the strip are folded over the constricted mesh the materials forming the folded strip and the constricted mesh melt. One or several attachment sections between the folded strip and the constricted mesh along the compressed portions of the mesh and of the strip are determined.
摘要:
The invention relates to a method of bonding two members together utilizing a stack of solid film adhesive and a layer of solid film adhesive, both disposed between the members. A pressure-applying device may be utilized to apply low pressure to force the members together. The pressure may force the stack to compress and expand in varying directions in order to substantially remove air-bubbles between the layer and one of the members. A heating device may be utilized to change the layer and the stack into liquid states in order to bond the members together with a void-free bond-line.
摘要:
An apparatus for welding a covering film superimposed on a sheet of thermoformable plastic material provided with a plurality of containers thermoformed thereupon, includes a first plate arrangement provided with an operating wall for supporting the sheet and a second plate arrangement provided with a welding arrangement for pressing the film and the sheet against the operating wall such as to weld the film and the sheet. The sheet includes a plurality of through holes interposed between the containers, and the first plate arrangement includes a conduit arrangement leading onto the operating wall at the through holes for extracting air from the containers, and/or for directing a gas to the containers.
摘要:
A welding system for heat welding a component to the contact surface workpiece is provided with a carriage and a component holding positioning unit and workpiece melting unit. The component holding unit and workpiece melting unit each include a respective hooked-shaped holding arm assembly and an associated support assembly used to secure and movably mount the holding arm assembly and an associated support assembly used to secure and movably mounted the holding arm assembly to the carriage. A heating or welding unit is mounted towards a distal end of the holding arm assembly, and which is operable to melt the contact surface when moved thereagainst. The component holding unit is provided with a component holder operable to fixedly grasp or release the selected component in its mounting to the workpiece. The carriage is provided for rotatable movement relative to a rotation axis to selectively move the component holding unit and workpiece melting units between melt operations position, wherein the heating or welding unit is brought into contact with the workpiece and activated to soften or partially melt the contact surface in advance of the component being moved thereagainst; and a fixture placement position, where the component holder moves the component into juxtaposition with the softened contact surface to cool and fuse with the workpiece.
摘要:
Methods and apparatus for fabricating adhesive bonded joints while minimizing the voids and/or porosity found in the cured bondline. In accordance with various embodiments, the apparatus comprises an evacuation chamber combined with a pressure inducing device to produce bonded joints that are both void free and thoroughly compacted. The surfaces to be bonded are continuously evacuated throughout the bonding process (pre-mating, mating, debulking and cure). Continuous evacuation is provided via standard vacuum, while the induced pressure can be pneumatically or mechanically provided.
摘要:
An apparatus is provided for splicing together old and new thermoformable sheets in order to supply a continuous thermoforming operation. The apparatus is used to join together thermoformable sheets by: providing a first thermoformable sheet with a trailing edge and a second thermoformable sheet with a leading edge; forming a terminal edge portion with a hot element along the trailing edge and a complementary terminal edge portion along the leading edge by severing a scrap sheet from each portion; laterally retracting each scrap portion away from the trailing edge and the leading edge; and joining together the first thermoformable sheet and the second thermoformable sheet by interlocking together the terminal edge portion with the complementary terminal edge portion.
摘要:
A thermoforming web accumulator is provided having a frame, a web guide element, an arm, and an actuator. The frame is configured to be provided within a thermoforming line. The web guide element is configured to be provided beneath a web of thermoformable material being delivered along the thermoforming line. The arm is carried by the frame and is configured to articulate the web guide element between raised and lowered positions. The actuator is operatively coupled with the arm to articulate the arm to controllably move the web guide element between raised and lowered positions to accumulate an extra length of web and discharge the extra length of web during a web splicing operation. A method is also provided.