DE801479C - Mold for injection molding objects made of thermoplastics - Google Patents
Mold for injection molding objects made of thermoplasticsInfo
- Publication number
- DE801479C DE801479C DEP34947A DEP0034947A DE801479C DE 801479 C DE801479 C DE 801479C DE P34947 A DEP34947 A DE P34947A DE P0034947 A DEP0034947 A DE P0034947A DE 801479 C DE801479 C DE 801479C
- Authority
- DE
- Germany
- Prior art keywords
- mold
- channels
- mold cavities
- thermoplastics
- around
- 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.)
- Expired
Links
- 229920001169 thermoplastic Polymers 0.000 title claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 title claims description 3
- 238000001746 injection moulding Methods 0.000 title claims 2
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
-
- 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
- B29C45/2701—Details not specific to hot or cold runner channels
-
- 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
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2714—Gates elongated, e.g. film-like, annular
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
zum Pressen von Gegenständen aus thermoplastischen Kunststoffen in Formen benutzt man, insbesondere wenn die Preßteile dickwandig sind, ein Varfahren, bei dem die zu pressende Masse durch den Druck eines Kolbens durch enge Kanäle in die Form gespritzt wird, im Gegensatz zu dem sonst üblichen Verfahren, bei dem die Masse unmittelbar in die Form geschüttet und dann durch den Druck eines Stempels gepreßt wird. Das erstgenannte Verfahren hat den Vorteil, daß einerseits die einzelnen Teilchen des gepreßten Körpers gleichmäßiger sind gegenüber dem zweiten Verfahren, bei dem die äußere Schicht mehr durchgehärtet wird als der innere Teil der Körper.for pressing objects made of thermoplastics in Molds are used, especially if the pressed parts are thick-walled, a method in which the mass to be pressed by the pressure of a piston through narrow channels in the mold is injected, in contrast to the usual process in which the The mass is poured directly into the mold and then by pressing a stamp is pressed. The first-mentioned method has the advantage that on the one hand the individual Particles of the pressed body are more uniform compared to the second method, in which the outer layer is hardened more than the inner part of the body.
I)a die in die Form eingespritzte Masse meist nur einseitig durch die Spritzkanäle zugeleitet wird, ist die Gleichmäßigkeit der Körper nicht immer so einwandfrei, wie dies wünschenswert wäre. Um al)er eine entsprechende Gleichmäßigkeit zu erreichen, werden gemäß der Erfindung die Spritzkanäle um die Formnester herum und gegebenenfalls auch um den Spritzzylinder herum kreisförmig gestaltet, wobei die zwischen den Ringkanälen und den Formnestern bzw. dem Spritzzylinder verbleibenden Flächen des Werkzeugunterteiles um einen geringeren Betrag niedriger sind, als die Flächen der Trennfuge zwischen Ober- und Unterteil des Preßwerkzeuges. Dadurch, daß die letztgenannten Flächen mit der Fläche des Werkzeugoberteiles einen kleinen, sehr dünnwandigen Raum hilden. wird die eingespritzte Masse den Formliestern von allen Seiten gleichmäßig zugefiihrt. Sofern eine größere Anzahl von Formnestern in einem Werkzeug vereinigt sind, findet durch die Anwendung eines Ringkanales um den Preßzylinder eine bessere Verteilung des Preßgutes für die einzelnen Formversenken statt. I) a the mass injected into the mold mostly only on one side the spray channels is fed, the evenness of the body is not always as flawlessly as it would be desirable. To al) he a corresponding evenness to achieve, according to the invention, the injection channels around the mold cavities and optionally also designed to be circular around the injection cylinder, wherein those remaining between the ring channels and the mold cavities or the injection cylinder Surfaces of the lower tool part are lower by a smaller amount than that Areas of the parting line between the upper and lower part of the press tool. Through this, that the last-mentioned surfaces with the surface of the upper part of the tool have a small, very thin-walled space. the injected mass will meet the mold requirements of fed evenly on all sides. Provided a larger number of mold cavities are combined in one tool, takes place through the use of an annular channel the press cylinder a better distribution of the material to be pressed for the individual die sinking instead of.
In der Abb. 1 ist tlie Form im Längsschnitt und in der Abb. 2 eine Draufsicht auf das Unterteil derselben abgebildet. In Fig. 1 tlie shape is in longitudinal section and in Fig. 2 one Top view of the lower part of the same shown.
111 dem Werkzeugunterteil I befindet sich in Form einer Bohrung der Spritzzylinder 2, in den von unten der Kolben 3 eingreift. Die Formnester 4 s:iid entsprechend den Erfordernissen in dem Werkzeugunterteil r angeordnet. Um die Formnester herum sind ringförmige Kanäle 5 angeordnet, die noch einen kleinen Abstand von den Nestern haben, so daß die ringförmigen Flächen 6 zwischen den Formnestern und diesen verbleiben. Diese Flächen 6 sind aber etwas niedriger als die Oberfläche des Werkzeugunterteiles I, so daß ein sehr kleiner Raum 7 zwischen den Flächen 6 und der Unterfläche des Werkzeugoberteiles verbleibt. Ein gleicher Ringkanal 8 wird auch um den Zylinder 2 angeordnet. sofern mehrere Formnester in dem Werkzeug vorhanden sind, denen die Masse gleichmäßig zugeführt werden muß. Die zwischen dem Zylinder 2 und dem Ringkanal 8 verbleibende kleine Ringfläche 9 bildet mit der Unterfläche des Oberstempels den kleinen Raum 10. Die Ringkaiiäle 8 und 5 stehen durch die geraden Spritzkanäle 11 in Verbindung. 111 the lower tool part I is in the form of a bore of the Injection cylinder 2, in which the piston 3 engages from below. The mold cavities 4 s: iid arranged according to the requirements in the tool lower part r. Around the mold cavities around annular channels 5 are arranged, which are still a small distance from the Have nests, so that the annular surfaces 6 between the mold nests and these remain. These surfaces 6 are, however, somewhat lower than the surface of the lower part of the tool I, so that a very small space 7 between the surfaces 6 and the lower surface of the The upper part of the tool remains. An identical ring channel 8 is also around the cylinder 2 arranged. if there are several mold cavities in the tool, which the Mass must be fed evenly. The one between the cylinder 2 and the ring channel 8 remaining small ring surface 9 forms with the lower surface of the upper punch small space 10. The ring kai channels 8 and 5 stand through the straight spray channels 11 in connection.
Das Spritzgut in dem Zyliiider 2 wird von dem Kolben durch den engen Raum 10 gleichmäßig dem Ringkanal 8 zugeführt. Von diesem fließt die Masse durch die Kanäle 11 in die Ringkanäle 5 hinein. The spray material in the cylinder 2 is pushed by the piston through the narrow Space 10 is fed evenly to the annular channel 8. From this the mass flows through the channels 11 into the ring channels 5.
Von den Ringkanälen 5 tritt sie durch die schmalen I Räume 7 in die Formnester 4 ein. Die Preßmasse läuft also nicht nur von der Seite der Spritzkanäle 1 1 in die Formnester 4 hinein, sondern allseitig. d. h. von allen Seiten gleichmäßig. From the ring channels 5 it occurs through the narrow I spaces 7 in the Mold cavities 4 a. The molding compound does not only run from the side of the injection channels 1 1 into the mold cavities 4, but on all sides. d. H. evenly on all sides.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP34947A DE801479C (en) | 1949-02-24 | 1949-02-24 | Mold for injection molding objects made of thermoplastics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP34947A DE801479C (en) | 1949-02-24 | 1949-02-24 | Mold for injection molding objects made of thermoplastics |
Publications (1)
Publication Number | Publication Date |
---|---|
DE801479C true DE801479C (en) | 1951-01-08 |
Family
ID=7373964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP34947A Expired DE801479C (en) | 1949-02-24 | 1949-02-24 | Mold for injection molding objects made of thermoplastics |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE801479C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0210942A2 (en) * | 1985-07-31 | 1987-02-04 | The Goodyear Tire & Rubber Company | Process and apparatus for injection molding tire treads |
EP1023979A2 (en) * | 1999-01-29 | 2000-08-02 | Daikyo Seiko, Ltd. | Molding die assembly for rubber members and rubber member produced thereby |
-
1949
- 1949-02-24 DE DEP34947A patent/DE801479C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0210942A2 (en) * | 1985-07-31 | 1987-02-04 | The Goodyear Tire & Rubber Company | Process and apparatus for injection molding tire treads |
EP0210942A3 (en) * | 1985-07-31 | 1988-05-25 | The Goodyear Tire & Rubber Company | Process and apparatus for injection molding tire treads |
EP1023979A2 (en) * | 1999-01-29 | 2000-08-02 | Daikyo Seiko, Ltd. | Molding die assembly for rubber members and rubber member produced thereby |
EP1023979A3 (en) * | 1999-01-29 | 2001-05-16 | Daikyo Seiko, Ltd. | Molding die assembly for rubber members and rubber member produced thereby |
US7426998B2 (en) | 1999-01-29 | 2008-09-23 | Daikyo Seiko, Ltd. | Molding die assembly for rubber members and rubber member produced thereby |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1577073C3 (en) | Method for producing a die element used for pressing sheet metal parts | |
DE2342794A1 (en) | METHOD AND DEVICE FOR THE DISCONTINUOUS MANUFACTURE OF MULTI-LAYER MOLDED PARTS FROM THERMOPLASTIC PLASTIC | |
DE2106546A1 (en) | Method and device for the injection molding of objects made of plastic | |
DE2346135A1 (en) | METHOD AND DEVICE FOR THE DISCONTINUOUS MANUFACTURING OF MULTI-LAYER MOLDED PARTS FROM THERMOPLASTIC PLASTIC | |
EP0064247A1 (en) | Apparatus for producing moulded articles with non spherical surfaces | |
DE717122C (en) | Method and device for the production of molded bodies from plastic masses, in particular hardenable synthetic resins | |
DE801479C (en) | Mold for injection molding objects made of thermoplastics | |
DE885152C (en) | Method and machine for pressing or spraying multicolored parts, preferably made of thermoplastics | |
DE2052220B2 (en) | Method and apparatus for manufacturing a plastic article having an annular incision in a mold | |
DE1177326B (en) | Process for the production of artificial flower petals made of thermoplastics and device for carrying out this process | |
DE19941997A1 (en) | Method and device for producing a tablet or the like | |
DE1623251U (en) | TOOLS FOR PRESSING MOLDED PARTS FROM COMPRESSED INSULATION MATERIAL. | |
DE1779884A1 (en) | Device for making seals | |
DE2315861A1 (en) | DEVICE FOR MANUFACTURING MOLDING COMPRESSES | |
DE894909C (en) | Tool for the production of molded parts using the transfer molding process | |
DE803683C (en) | Tool for pressing moldings made of thermoplastics using the injection molding process | |
DE1164035B (en) | Device for spotting and for the production of sample casts of die casting molds, injection molds or the like. | |
DE825167C (en) | Device for the production of objects from molding compound with an insert that contrasts in color with the surface of the object | |
AT232711B (en) | Process for the manufacture of articles from thermoplastic material | |
DE653980C (en) | Press casting machine with piston pressure | |
DE751116C (en) | Injection molding machine for heat-elastic masses | |
DE2431382A1 (en) | RESERVOIR MADE OF PLASTIC | |
DE1160169B (en) | Process for the injection molding of thick-walled bodies made of thermoplastics | |
DE913577C (en) | Process for the production of objects by non-cutting deformation | |
DE870476C (en) | Process for the production of bodies from plastic by compression molding |