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5641448 Method of producing plastic injection molds for prototype parts
Patents ALERT
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5636440
OPERATOR STATION FOR MANUFACTURING PROCESS CONTROL SYSTEM van Weele Leonardus A; de Bruijn Ronny; Vermeire Roger; Zemering Christ; Lenting Ben Terneuzen, NETHERLANDS assigned to Dow Benelux N V An operator station for a manufacturing process control system including a network of at least one dedicated process control computer for monitoring and controlling SECTIONS of the manufacturing process wherein each SECTION includes one or more SEQUENCES of the manufacturing processthe operator station includes a processor, a communication link to the process control communication system, a display including a SECTIONS window providing information relating to at least one of the SECTIONS monitored by the operating station and a SEQUENCE window providing information relating to one or more SEQUENCES monitored by the operator station, a data input device for selecting a SECTION from which information is to be displayed. The operator station may further include a flow sheet display window which includes a graphic depiction of a portion of the process, and a trend display window which includes current and historical information in graphic form for selected process control variables.
PROCESS FOR MANUFACTURING HOLLOW BLADE FOR A TURBO-MACHINE
A
Bichon Matthieu; Douguet Charles J P; Lorieux Alain G H; Louesdon Yvon M J; Renou Florence A N Ermont, FRANCE assigned to Societe Nationale d’Etude et de Construction de Moteurs d’Aviation Snecma A process for manufacturing a hollow turbo-machine blade comprises the steps of: (a) using computer aided design and manufacture (CAD/CAM) means to create, from a definition of the blade to be produced, a digital simulation of the flat form of the primary parts of said blade; (b) die-forging said primary parts in a press observing certain conditions; (c) machining said primary parts; (d) depositing diffusion barriers on at least one of said primary parts according to a predefined pattern; (e) assembling said primary parts, followed by diffusion welding them together under isostatic pressure; (f) inflating the welded assembly and shaping it by superplastic forming; and, (g) final machining; the process possibly also including an additional step of cambering and twisting the primary parts either before or after they are welded together.
5641448 5631851 METHOD OF MONITORING MACHINING LOAD USING VARIABLE ALARM THRESHOLD Tanaka Kunio; Onishi Yasush; Sato Koji assigned to Fanuc Ltd
METHOD OF PRODUCING PLASTIC INJECTION MOLDS FOR PROTOTYPE PARTS Yeung Millan K; Wells William J; Bramall Brian K; Laporte Michel V Ottawa, CANADA assigned to National Research Council of Canada
Akishima, JAPAN
A method of monitoring machining load on a numerically controlled machine tool in such a way that incorrect judgment due to variations in machining load which are caused according to the machining conditions is made less frequent. The method is started by performing plural trial cutting operations. A signal indicating the machining load during these trial cutting operations is sampled and thus, sampling data is obtained. Reference data about the machining load and its variance are calculated from the sampling data and loaded in a reference data table. A threshold value according to variations in the sampling data is established, using the value of the variance. A load monitor means compares the reference data with data about the machining load obtained from actual measurements whenever each interval of time elapses. A decision is made as to whether the difference exceeds the threshold value. In this way, the machining load is monitored.
A process for making a portion of a temporary mold capable of producing several prototype plastic parts, including using computer-aided design to produce a geometric computer model of a prototype part suitable for being molded in plastic, and using this computer model in a rapid prototyping system, such as a stereolithography system, to produce a mold portion from plastic material. The mold portion has an inner surface substantially complementary to an outer surface of the intended plastic part. Solid support is provided for the mold portion to prevent any flexing thereof in later operation. The mold portion inner surface is coated with a layer of metal such as nickel having a thickness of between 75 and 150 mum, which layer has an inner surface adhered to the mold inner surface and an outer surface of the precise shape and dimensions for forming the plastic parts. The mold portion, including its support, is fitted into an injection molding machine, and used to produce the prototype parts at relatively low pressures which do not harm the mold.
245
5631825
5636440
OPERATOR STATION FOR MANUFACTURING PROCESS CONTROL SYSTEM van Weele Leonardus A; de Bruijn Ronny; Vermeire Roger; Zemering Christ; Lenting Ben Terneuzen, NETHERLANDS assigned to Dow Benelux N V An operator station for a manufacturing process control system including a network of at least one dedicated process control computer for monitoring and controlling SECTIONS of the manufacturing process wherein each SECTION includes one or more SEQUENCES of the manufacturing processthe operator station includes a processor, a communication link to the process control communication system, a display including a SECTIONS window providing information relating to at least one of the SECTIONS monitored by the operating station and a SEQUENCE window providing information relating to one or more SEQUENCES monitored by the operator station, a data input device for selecting a SECTION from which information is to be displayed. The operator station may further include a flow sheet display window which includes a graphic depiction of a portion of the process, and a trend display window which includes current and historical information in graphic form for selected process control variables.
PROCESS FOR MANUFACTURING HOLLOW BLADE FOR A TURBO-MACHINE
A
Bichon Matthieu; Douguet Charles J P; Lorieux Alain G H; Louesdon Yvon M J; Renou Florence A N Ermont, FRANCE assigned to Societe Nationale d’Etude et de Construction de Moteurs d’Aviation Snecma A process for manufacturing a hollow turbo-machine blade comprises the steps of: (a) using computer aided design and manufacture (CAD/CAM) means to create, from a definition of the blade to be produced, a digital simulation of the flat form of the primary parts of said blade; (b) die-forging said primary parts in a press observing certain conditions; (c) machining said primary parts; (d) depositing diffusion barriers on at least one of said primary parts according to a predefined pattern; (e) assembling said primary parts, followed by diffusion welding them together under isostatic pressure; (f) inflating the welded assembly and shaping it by superplastic forming; and, (g) final machining; the process possibly also including an additional step of cambering and twisting the primary parts either before or after they are welded together.
5641448 5631851 METHOD OF MONITORING MACHINING LOAD USING VARIABLE ALARM THRESHOLD Tanaka Kunio; Onishi Yasush; Sato Koji assigned to Fanuc Ltd
METHOD OF PRODUCING PLASTIC INJECTION MOLDS FOR PROTOTYPE PARTS Yeung Millan K; Wells William J; Bramall Brian K; Laporte Michel V Ottawa, CANADA assigned to National Research Council of Canada
Akishima, JAPAN
A method of monitoring machining load on a numerically controlled machine tool in such a way that incorrect judgment due to variations in machining load which are caused according to the machining conditions is made less frequent. The method is started by performing plural trial cutting operations. A signal indicating the machining load during these trial cutting operations is sampled and thus, sampling data is obtained. Reference data about the machining load and its variance are calculated from the sampling data and loaded in a reference data table. A threshold value according to variations in the sampling data is established, using the value of the variance. A load monitor means compares the reference data with data about the machining load obtained from actual measurements whenever each interval of time elapses. A decision is made as to whether the difference exceeds the threshold value. In this way, the machining load is monitored.
A process for making a portion of a temporary mold capable of producing several prototype plastic parts, including using computer-aided design to produce a geometric computer model of a prototype part suitable for being molded in plastic, and using this computer model in a rapid prototyping system, such as a stereolithography system, to produce a mold portion from plastic material. The mold portion has an inner surface substantially complementary to an outer surface of the intended plastic part. Solid support is provided for the mold portion to prevent any flexing thereof in later operation. The mold portion inner surface is coated with a layer of metal such as nickel having a thickness of between 75 and 150 mum, which layer has an inner surface adhered to the mold inner surface and an outer surface of the precise shape and dimensions for forming the plastic parts. The mold portion, including its support, is fitted into an injection molding machine, and used to produce the prototype parts at relatively low pressures which do not harm the mold.