DE2462405A1 - Injection pressure control - by sensing mould pressure and heater or obstructing material flow accordingly - Google Patents

Injection pressure control - by sensing mould pressure and heater or obstructing material flow accordingly

Info

Publication number
DE2462405A1
DE2462405A1 DE19742462405 DE2462405A DE2462405A1 DE 2462405 A1 DE2462405 A1 DE 2462405A1 DE 19742462405 DE19742462405 DE 19742462405 DE 2462405 A DE2462405 A DE 2462405A DE 2462405 A1 DE2462405 A1 DE 2462405A1
Authority
DE
Germany
Prior art keywords
pressure
mold cavity
injection
control device
measuring device
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.)
Granted
Application number
DE19742462405
Other languages
German (de)
Other versions
DE2462405C2 (en
Inventor
Rodney J Groleau
Donald C Paulson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Control Process Inc
Original Assignee
Control Process Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Control Process Inc filed Critical Control Process Inc
Priority to DE19742462405 priority Critical patent/DE2462405C2/en
Publication of DE2462405A1 publication Critical patent/DE2462405A1/en
Application granted granted Critical
Publication of DE2462405C2 publication Critical patent/DE2462405C2/en
Expired legal-status Critical Current

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
    • B29C2045/304—Adjustable torpedoes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The injection pressure in a mould for fluid synthetic resins is controlled by sensing the pressure within the mould and either controlling the temp. of the incoming material or its flow rate accordingly. Temp. may be controlled by heaters located around or projecting into the sprue and flow rate may be controlled by a plug which projects into the sprue. Such control produces highly uniform batches of articles and is simple compared with the prior cut. The pressure sensing means is pref. a plug slidable, in response to the pressure of the injecte material, in a bore leading into the mould cavity.

Claims (3)

PATENTANSPRÜCHE 1. Kunststoff-Spritzgießmaschine zum Herstellen von Spritzguß-Formteilen, mit einer Spritzgießform mit mindestens einem Formhohlraum in den plastifizierte Kunststoffmasse einspritzbar ist, mit einer Druckmeßeinrichtung zum Messen eines Drukkes in der einspritzbaren, plastifizierten Kunststoffmasse, und mit einer Regeleinrichtung, die an die Druckmeßeinrichtung angeschlossen ist und über eine Steuereinrichtung den Druckverlauf im Formhohlraum regelt, dadurch g e k e n n -z e i c h n e t , daß die Druckmeßeinrichtung (26) in an sich bekannter Weise in der Spritzgießform (10) zur direkten Messung des Druckes im Formhohlraum (20) angeordnet ist, und daß die Steuereinrichtung ein an einer Stelle längs eines innerhalb der Spritzgießform (10) geführten Zufuhrkanals (14) für die einspritzbare Kunststoffmasse angeordnetes Ventilelement (96) zur Steuerung des Durchtrittsquerschnittes für die Kunststoffmasse vorgesehen ist, um den Durchtrittsquerschnitt mit Bezug auf den Druck im Formhohlraum derart zu variieren, daß ein vorbestimmtes Druckprofil der Kunststoffmasse einstell-- und aufrechterhaltbar ist.PATENT CLAIMS 1. Plastic injection molding machine for the production of Injection molded parts, with an injection mold with at least one mold cavity can be injected into the plasticized plastic mass, with a pressure measuring device for measuring a pressure in the injectable, plasticized plastic compound, and with a control device which is connected to the pressure measuring device and regulates the pressure profile in the mold cavity via a control device, thereby g e k e n n -z e i c h n e t that the pressure measuring device (26) is known per se Way in the injection mold (10) for direct measurement of the pressure in the mold cavity (20) is arranged, and that the control device at a point along one inside the injection mold (10) guided feed channel (14) for the injectable Plastic compound arranged valve element (96) for controlling the passage cross-section for the plastic mass is provided to the passage cross-section with reference to vary the pressure in the mold cavity so that a predetermined pressure profile the plastic compound can be adjusted and maintained. 2. Kunststo#ff-Spritzgießmaschine nach Anspruch 1, dadurch g e -k e n n z e i c h n e t , daß mindestens im Bereich eines Formhohlraums (20) eine Druckmeßeinrichtung (26) angeordnet ist, bei der der im Formhohlraum (20)auftretende Druck über ein mechanisches Glied (32) auf einen Aufnehmer oder Wandler (34) übertragbar ist, durch den den gemessenen Druckwerten entsprechende elektrische Ausgangssignale der Regeleinrichtung (24, 28) zuführbar sind.2. Kunststo # ff injection molding machine according to claim 1, characterized in that g e -k It is noted that at least in the area of a mold cavity (20) a Pressure measuring device (26) is arranged in which the occurring in the mold cavity (20) Pressure can be transmitted to a transducer or transducer (34) via a mechanical member (32) is through the electrical output signals corresponding to the measured pressure values the control device (24, 28) can be fed. 3. Kunststoff-Spritzgießmaschine nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß das Ventilelement (98) in der Spritzgießform (10) bewegbar gelagert ist und in einen dem Formhohlraum (20, 22) vorgelagerten, dem Zufuhrkanal (14) zugeordneten Ventiltrichter (16, 18) ragt, und daß eine Einrichtung (104) vorgesehen ist, die in Abhängigkeit von den der Regeleinrichtung (24, 28) seitens der Druckmeßeinrichtung (26) zugeführten Ausgangssignalen das Ventilelement bewegt.3. Plastic injection molding machine according to claim 1, characterized in that g e k e It is noted that the valve element (98) is movable in the injection mold (10) is stored and in one of the mold cavity (20, 22) upstream, the supply channel (14) associated valve funnel (16, 18) protrudes, and that a device (104) is provided which depends on the control device (24, 28) on the part of the pressure measuring device (26) supplied output signals moves the valve element. LeerseiteBlank page
DE19742462405 1974-01-10 1974-01-10 Pressure measuring and control device for a plastic injection molding machine Expired DE2462405C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742462405 DE2462405C2 (en) 1974-01-10 1974-01-10 Pressure measuring and control device for a plastic injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742462405 DE2462405C2 (en) 1974-01-10 1974-01-10 Pressure measuring and control device for a plastic injection molding machine

Publications (2)

Publication Number Publication Date
DE2462405A1 true DE2462405A1 (en) 1977-05-18
DE2462405C2 DE2462405C2 (en) 1983-12-15

Family

ID=5934991

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19742462405 Expired DE2462405C2 (en) 1974-01-10 1974-01-10 Pressure measuring and control device for a plastic injection molding machine

Country Status (1)

Country Link
DE (1) DE2462405C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001366A1 (en) * 1979-06-25 1981-01-08 Yamato Kogure METHOD AND DEVICE FOR INJECTION MOLDING RESIN AND PRODUCTS PRODUCED AFTER IT, METHOD FOR EMBEDDING A WAX MOLD IN A PLASTER MOLD

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127465A1 (en) * 1971-06-03 1972-12-14 Hengstler Kg Measuring and control device on injection molding machines
DE2227048A1 (en) * 1971-06-03 1973-01-25 Gir Pi Societe Plast Ind Gir INJECTION MOLDING TOOL
DE2230649A1 (en) * 1971-07-14 1973-02-08 Tempcraft Tool & Mold NOZZLE ARRANGEMENT FOR MOLD INJECTION

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127465A1 (en) * 1971-06-03 1972-12-14 Hengstler Kg Measuring and control device on injection molding machines
DE2227048A1 (en) * 1971-06-03 1973-01-25 Gir Pi Societe Plast Ind Gir INJECTION MOLDING TOOL
DE2230649A1 (en) * 1971-07-14 1973-02-08 Tempcraft Tool & Mold NOZZLE ARRANGEMENT FOR MOLD INJECTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001366A1 (en) * 1979-06-25 1981-01-08 Yamato Kogure METHOD AND DEVICE FOR INJECTION MOLDING RESIN AND PRODUCTS PRODUCED AFTER IT, METHOD FOR EMBEDDING A WAX MOLD IN A PLASTER MOLD

Also Published As

Publication number Publication date
DE2462405C2 (en) 1983-12-15

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