US2920172A - Dielectric heating and pressing die structure - Google Patents
Dielectric heating and pressing die structure Download PDFInfo
- Publication number
- US2920172A US2920172A US61390656A US2920172A US 2920172 A US2920172 A US 2920172A US 61390656 A US61390656 A US 61390656A US 2920172 A US2920172 A US 2920172A
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- US
- United States
- Prior art keywords
- die
- spacer
- press
- electrode
- edges
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
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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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
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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
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
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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
- B29C66/006—Preventing damaging, e.g. 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
- B29C66/01—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
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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
- B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
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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
- B29C66/45—Joining of substantially the whole surface of the 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
- B29C66/72—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 structure of the material of the parts to be joined
- B29C66/723—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 structure of the material of the parts to be joined being multi-layered
- B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72321—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
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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
- B29C66/72—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 structure of the material of the parts to be joined
- B29C66/729—Textile or other fibrous material made from plastics
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8124—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/81262—Electrical and dielectric properties, e.g. electrical conductivity
- B29C66/81263—Dielectric properties
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/81457—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
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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
- B29C66/80—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
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/46—Molding using an electrical heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/013—Electric heat
Definitions
- This invention relates to novel die structure for dielectric heating and pressing apparatus.
- the present invention contemplates as a primary'object the provision of novel die structure especially adapted to eliminate undesired electrical arcing.
- the invention seeks to provide die structure including a pair' of die elements with one a spacer die element for positioning the work material a predetermined distance from the origin of the electrical arc and for' enabling the electrodes to be spaced further apart, thus eliminating the arc possibility.
- the configuration and disposition of the related die elements is such that the direction of the electric fields is controlled to prevent arcing.
- the invention provides, for some applications, resilient means for distributing and equalizing pressures which otherwise tend to injure the workpiece.
- FIG. 1 is a'schematic view of an apparatus embodying the principles of this invention.
- Figure 2 is a schematic view of a modified apparatus incorporating the invention.
- Figure 3 isr a perspective view of work material formed in the Figure l apparatus.
- Figure 4 is a perspective view of work material formed in the Figure 2 apparatus.
- the dielectric method of heating material is based on the condenser or capacitor principle.
- the material to be heated is placed between a pair of electrode or capacitor members which are subjected to a high frequency voltage lfrom a suitable source. Initially, when these members are charged, a polarity is established with the negatively charged particles being repelled by the negative member and attracted by the positive member. Then, the polarity is reversed as is the electronic action. vBy rapidly alternating the potential difference on the members, the Vcharged Aparticle movement back and forth generates heat in the dielectric between the electrode members.
- FIG 1 an arrangement is demonstrated especially adapted Vfor embossing some heat and pressure 2 sensitive fabric material, suchas a fabric pad 10 illustrated in Figure 3.
- a press element or 4embossing die 12 having embossing ribs, (not shown) to provide the Figure 3 pattern is supported by an upper press platen 14.
- a lower press platen 16 properly insulated and having mounted thereon a capacitor or electrode member 18 of good conducting material, such as aluminum.
- a resilient member 20 ofn material with excellent dielectric insulating properties such as butyl rubber, a spacer element or imager die 22 of electrically conductive material, another resilient sheet member 24 of heat resistant resilient material, eg., silicone rubber, and the fabric pad 10.
- a means e.g., ⁇ some vtype of high frequency generator designated generally at 26, is provided for applying a high frequency voltage 'betweenv the electrodes.
- the ⁇ press is operated in,a known manner simultaneously subjecting the pad 1l)y to a prescribedl pressure and a dielectric heat which togetherresult in the desired embossed pattern beingimpressedin the pad.
- the embossing die k12 is larger than the fabric pad 10 and the fabric pad 10 is larger than the image die 22. ⁇ Since the image die 22, in effect, becomes an electrode (energy is transferred through the butyl rubber by means of a high frequency capacity coupling), the electric field will be drawn ⁇ inwardly along ay path4 ,thatwill noticause destructive arcing, e.g., along the broken vlines 2 8, from the embossing die 12 to the image die 22 ⁇ -when the fabric pad 10, which constitutes a relatively strong dielectric compared to air, is ⁇ heated. Also, the edges of the dies 12 and 22 are preferably rounded to prevent point concentration of the field.
- the electric field would extend from the edges of the embossing die 12 through the air, a weak dielectric, tothe lower press platen 1.6 and electrode member 18 ⁇ causing electrical arcing with the resultant sparks burning the edges of the pad 10.
- the thickness of the image die 22 maybe varied, as desired, to insure that the distance. between the embossing die and ythe-lower press platen l'jand electrode mem-ber 18 is suiiiciem to discourage any ⁇ arcing tendency.
- the resilient members 20 and y24 are employed principally to equalize and distribute pressures during the pressing operation, thus insuring even embossing patterns Without damaging the fabric, avaluable feature with delicate fabrics.
- the heat resistant resilient material provides additional protection against electrical arcing.
- one or both of these members 20 and 24 may be eliminated in certain applications.
- the edges are moved from the electrode member 18 a sufficient distance that arcing will not occur with the voltages being used.
- the corners of the dies 12' and 22 are rounded and the image die 22 is smaller than the embossing die 12 to direct the electric eld inwardly along the lines 36 away from the electrode member 18.
- pads of material may be cut to the intended size and embossed without any necessity of later trimming away burned and scorched edges.
- Another important consideration and advantage is that with the Figure land 2 arrangements, a greater voltage may be employed without concern for arcing, hence speeding up the embossing operation and saving time.
- Apparatus for dielectrically heating and working heat yand pressure sensitive material comprising, in combination, an electrically conductive spacer element and a. press element disposed on opposite sides of the material in pressing relation therewith, an electrode member associated with said spacer member, means for applying high frequency voltage between said electrode member and said press element to dielectrically heat the material, said spacer member spacing the material a predetermined distance from the electrode to prevent electrical arcing between the press element and .the electrode member at the edges of the material.
- Apparatus for dielectrically heating and working heat and pressure sensitive material comprising, in combination, an electrically conductive spacer element and a' press element disposed on opposite sides of the material in pressing relation therewith, an electrode member associated with said spacer element opposite the material, means vfor applying high frequency voltage between said press element and said electrode member to dielectrically heat the material, said press element extending beyond and overlapping said spacer element so as to cause an electric field to be directed inwardly towards said spacer element thereby preventing destructive arcing at the edges of the material.
- Apparatus for dielectrically heating and working heat and pressure sensitive material comprising, in cornbination, yan electrically conductive spacer element and a. press element disposed on opposite sides of the material in pressing relation therewith, an electrode member associated with said spacer member opposite the material, means for applying high frequency voltage between said press element and said electrode member to dielectrically heat the material, said spacer member spacing the material a predetermined distance from said electrode member, said press element extending beyond and overlapping said spacer element so as to cause an electric field to be directed inwardly towards said spacer element, the spacing and directing by said spacer element preventing destructive arcing at the edges of the material.
- Apparatus for dielectrically heating and working heat and pressure sensitive material comprising, in combination, an electrically conductive spacer element and a press element having rounded edges and disposed on opposite sides of the material in pressing relation therewith, an electrode member associated with a part of said spacer element opposite the material, means for applying high frequency voltage between said press element and s aid electrode member to dielectrically heat the material, said spacer member spacing the Vmaterial a predetermined distance from said electrode member, said press element extending beyond and overlapping said spacer element so as to cause an electric field to be directed inwardly towards said spacer element, the spacing and directing by said spacer element preventing destructive arcing at the edges of the material.
- Apparatus for dielectrically heating and working heat and pressure sensitive material comprising, in combination, an electrically conductive spacer element and a press element disposed on opposite sides of the material in pressing relation therewith, said spacer and press elements having rounded edges and corners so as to prevent point concentration of an electric field, an electrode member adjacent the spacer element at a side opposite the material, a heat resistant resilient member disposed between said spacer member and said electrode to equalize and distribute pressures, said press element extending beyond and overlapping said spacer element so as to cause an electric eld to be directed inwardly towards said spacer element thereby preventing destructive arcing at the edges of the material.
- Apparatus for dielectrically heating and working heat and pressure sensitive material comprising, in combinaton, an electrically conductive spacer element and a press element disposed on opposite sides of the material in pressing relation therewith, said spacer member having a heat ⁇ resistant resilient member between the material and the spacer member, ari electrode member adjacent said spacer element at a side opposite the working material, means for applying high frequency voltage between said press element and said electrode member to dielectrically heat the material, another heat resistant resilient member disposed between said electrode member and said spacer element, said heat resistant resilient members functioning to distribute pressures and stabilize heat variations, said press member extending beyond and overlapping said spacer member so as to cause an electric field to be directed inwardly towards said spaced member, said spacer member spacing the material a predetermined distance from said electrode member, the spacing and directing by said spacer member preventing destructive arcing at the edges of the material.
- Apparatus for dielectrically heating and embossing heat and pressure sensitive material with one side having a metalized surface comprising, in combination, an embossing die and an electrically conductive portable image die disposed on opposite sides of the material, the metalized surface of the material facing the embossing die, said dies being relatively movable into pressing relation with the material, said embossing die being adapted to function as an electrode, an electrode niember functioning as another electrode supporting said image die, said dies having rounded edges and corners to prevent point concentration of an electric field, and means for applying high frequency voltage between said embossing die and said electrode member, said press element extend- 4ing beyond and overlapping said image die so as to cause an electric iield to be directed inwardly towards said image die, said image die spacing the material a predetremined distance from said electrode member, the spacing and directing by said image die preventing destructive arcing at the edge of the material.
- Apparatus for dielectrically heating and embossing heat and pressure sensitive material comprising, in combination, a movable embossing die and an electrically conductive portable image die disposed on opposite sides of the material, the material having a peripheral size greater than said image die and less than said embossing die, said embossing die adapted to function as an electrode, a heat resistant resilient member being disposed between the material and the image die, a stationary electrode member functioning as another electrode and supporting said image die, another heat resistant resilient member between said electrode member and said image die, said dies having rounded edges and corners so as to prevent point concentration of an electric field, and means for applying high frequency voltage between said embossing die and said electrode member with the embossing die in pressing ,relation with the material,
- Yto function Ias an electrode and an electrically conductive transportable spacer die disposed adjacent said press die, said spacer die being of a predetermined thickness and of a smaller peripheral size than said press die so as to control arcing, said press and spacer dies having rounded boundary edges to prevent point concentration of an electric field and an electrode member supporting said spacer die.
- Die structure for use in delectrically heated press apparatus comprising, in combination, a press die and an electrically conductive transportable spacer die oppositely disposed with the press die extending beyond and overlapping the spacer die, said spacer die having a heat resistant resilient member disposed along a side opposite the press die and another heat resistant resilient member disposed on the opposite side of the spacer die, and an electrode member next to said other heat resistant resilient member, said spacer die being of a predetermined thickness and of a smaller peripheral size than said press die so as to control arcing.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Textile Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US61390656 US2920172A (en) | 1956-10-04 | 1956-10-04 | Dielectric heating and pressing die structure |
DEG22963A DE1295113B (de) | 1956-10-04 | 1957-09-19 | Vorrichtung zum Praegen eines Musters auf ein dielektrisches Plattenmaterial |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61390656 US2920172A (en) | 1956-10-04 | 1956-10-04 | Dielectric heating and pressing die structure |
Publications (1)
Publication Number | Publication Date |
---|---|
US2920172A true US2920172A (en) | 1960-01-05 |
Family
ID=24459146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US61390656 Expired - Lifetime US2920172A (en) | 1956-10-04 | 1956-10-04 | Dielectric heating and pressing die structure |
Country Status (2)
Country | Link |
---|---|
US (1) | US2920172A (de) |
DE (1) | DE1295113B (de) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3368692A (en) * | 1964-01-20 | 1968-02-13 | Coniker Entpr Inc | Pleated pocket forming method |
US3671709A (en) * | 1970-09-14 | 1972-06-20 | Monsanto Co | Heat sealing of porous materials |
US3892505A (en) * | 1968-07-23 | 1975-07-01 | Cebal Gp | Means for heating a mold |
US4308223A (en) * | 1980-03-24 | 1981-12-29 | Albany International Corp. | Method for producing electret fibers for enhancement of submicron aerosol filtration |
US4380519A (en) * | 1981-03-30 | 1983-04-19 | E. I. Du Pont De Nemours And Company | Process for embossing polymeric substrates by using a composite structure of an aromatic polyamide fabric coated with a fluorosilicone rubber |
US5051083A (en) * | 1988-03-28 | 1991-09-24 | De La Rue Giori S.A. | Plant for manufacturing a mold in the form of a multiple-impression plastic plate for reproducing intaglio printing plates |
US5122043A (en) * | 1990-12-06 | 1992-06-16 | Matthews M Dean | Electric pulsed power vacuum press |
US5139407A (en) * | 1989-09-01 | 1992-08-18 | General Electric Company | Apparatus for reducing thermoplastic material compression mold cycle time |
US5223684A (en) * | 1991-05-06 | 1993-06-29 | Ford Motor Company | Method and apparatus for dielectrically heating an adhesive |
US5418466A (en) * | 1990-10-12 | 1995-05-23 | Watson; Keith | Moisture and salinity sensor and method of use |
US20180177003A1 (en) * | 2015-08-28 | 2018-06-21 | Toyo Seikan Group Holdings, Ltd. | High-frequency dielectric heating method |
US10513079B2 (en) | 2016-10-20 | 2019-12-24 | Baxter International Inc. | Sealing die with chamfered edge |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4346140A (en) * | 1981-03-30 | 1982-08-24 | E. I. Du Pont De Nemours And Company | Composite structure of an aromatic polyamide fabric coated with a fluorosilicone rubber |
Citations (9)
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US1806846A (en) * | 1931-05-26 | Vania | ||
US1997263A (en) * | 1928-07-04 | 1935-04-09 | Telefunken Gmbh | Method of manufacturing thin dielectric materials for high potential work |
GB577719A (en) * | 1944-04-22 | 1946-05-29 | British Insulated Cables Ltd | Improvements relating to apparatus for heating insulating material by subjecting it to a high frequency field of electric force |
GB621514A (en) * | 1946-09-18 | 1949-04-11 | British Insulated Callenders | Improvements in or relating to bags for bag moulding |
US2526697A (en) * | 1946-06-21 | 1950-10-24 | Armstrong Cork Co | Dielectric heating method and apparatus |
US2526699A (en) * | 1946-06-21 | 1950-10-24 | Armstrong Cork Co | Method of compensating for or preventing heat losses from material during dielectric heating thereof |
US2536316A (en) * | 1949-05-03 | 1951-01-02 | Art Electrotype Company | Method of making electrotype molds |
US2578209A (en) * | 1949-11-30 | 1951-12-11 | Art Electrotype Company | Method of making molds for electrotypes |
US2595502A (en) * | 1946-08-01 | 1952-05-06 | Allis Chalmers Mfg Co | Variable capacity circuit for dielectric heating apparatus |
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GB577720A (en) * | 1944-04-22 | 1946-05-29 | British Insulated Cables Ltd | Improvements relating to apparatus for heating insulating material by subjecting it to a high frequency field of electric force |
DE896247C (de) * | 1945-03-30 | 1953-11-09 | Siemens Ag | Anordnung zum Erhitzen von Isolierkoerpern im elektrischen Wechselfelde, insbesondere zum Vulkanisieren von Kautschuk |
GB629371A (en) * | 1946-06-21 | 1949-09-19 | Armstrong Cork Co | Improvements in or relating to dielectric heating |
FR963711A (de) * | 1948-02-26 | 1950-07-19 | ||
DE866372C (de) * | 1951-03-18 | 1953-02-09 | Lorenz C Ag | Anordnung zur Verschweissung thermoplastischer Folien |
-
1956
- 1956-10-04 US US61390656 patent/US2920172A/en not_active Expired - Lifetime
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- 1957-09-19 DE DEG22963A patent/DE1295113B/de active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US1806846A (en) * | 1931-05-26 | Vania | ||
US1997263A (en) * | 1928-07-04 | 1935-04-09 | Telefunken Gmbh | Method of manufacturing thin dielectric materials for high potential work |
GB577719A (en) * | 1944-04-22 | 1946-05-29 | British Insulated Cables Ltd | Improvements relating to apparatus for heating insulating material by subjecting it to a high frequency field of electric force |
US2526697A (en) * | 1946-06-21 | 1950-10-24 | Armstrong Cork Co | Dielectric heating method and apparatus |
US2526699A (en) * | 1946-06-21 | 1950-10-24 | Armstrong Cork Co | Method of compensating for or preventing heat losses from material during dielectric heating thereof |
US2595502A (en) * | 1946-08-01 | 1952-05-06 | Allis Chalmers Mfg Co | Variable capacity circuit for dielectric heating apparatus |
GB621514A (en) * | 1946-09-18 | 1949-04-11 | British Insulated Callenders | Improvements in or relating to bags for bag moulding |
US2536316A (en) * | 1949-05-03 | 1951-01-02 | Art Electrotype Company | Method of making electrotype molds |
US2578209A (en) * | 1949-11-30 | 1951-12-11 | Art Electrotype Company | Method of making molds for electrotypes |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3368692A (en) * | 1964-01-20 | 1968-02-13 | Coniker Entpr Inc | Pleated pocket forming method |
US3892505A (en) * | 1968-07-23 | 1975-07-01 | Cebal Gp | Means for heating a mold |
US3671709A (en) * | 1970-09-14 | 1972-06-20 | Monsanto Co | Heat sealing of porous materials |
US4308223A (en) * | 1980-03-24 | 1981-12-29 | Albany International Corp. | Method for producing electret fibers for enhancement of submicron aerosol filtration |
US4380519A (en) * | 1981-03-30 | 1983-04-19 | E. I. Du Pont De Nemours And Company | Process for embossing polymeric substrates by using a composite structure of an aromatic polyamide fabric coated with a fluorosilicone rubber |
US5051083A (en) * | 1988-03-28 | 1991-09-24 | De La Rue Giori S.A. | Plant for manufacturing a mold in the form of a multiple-impression plastic plate for reproducing intaglio printing plates |
US5139407A (en) * | 1989-09-01 | 1992-08-18 | General Electric Company | Apparatus for reducing thermoplastic material compression mold cycle time |
US5418466A (en) * | 1990-10-12 | 1995-05-23 | Watson; Keith | Moisture and salinity sensor and method of use |
US5122043A (en) * | 1990-12-06 | 1992-06-16 | Matthews M Dean | Electric pulsed power vacuum press |
WO1992010348A1 (en) * | 1990-12-06 | 1992-06-25 | Matthews M Dean | Electric pulsed power vacuum press |
US5223684A (en) * | 1991-05-06 | 1993-06-29 | Ford Motor Company | Method and apparatus for dielectrically heating an adhesive |
US20180177003A1 (en) * | 2015-08-28 | 2018-06-21 | Toyo Seikan Group Holdings, Ltd. | High-frequency dielectric heating method |
US10513079B2 (en) | 2016-10-20 | 2019-12-24 | Baxter International Inc. | Sealing die with chamfered edge |
Also Published As
Publication number | Publication date |
---|---|
DE1295113B (de) | 1969-05-14 |
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