SE428447B - SET TO MAKE A RESISTANT ELEMENT OF PLASTIC - Google Patents
SET TO MAKE A RESISTANT ELEMENT OF PLASTICInfo
- Publication number
- SE428447B SE428447B SE8101760A SE8101760A SE428447B SE 428447 B SE428447 B SE 428447B SE 8101760 A SE8101760 A SE 8101760A SE 8101760 A SE8101760 A SE 8101760A SE 428447 B SE428447 B SE 428447B
- Authority
- SE
- Sweden
- Prior art keywords
- mold
- plastic
- area
- cooling
- mold cavity
- Prior art date
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
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
- B42F1/00—Sheets temporarily attached together without perforating; Means therefor
- B42F1/02—Paper-clips or like fasteners
- B42F1/10—Paper-clips or like fasteners non-metallic
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/7343—Heating or cooling of the mould heating or cooling different mould parts at different temperatures
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/735—Heating or cooling of the mould heating a mould part and cooling another mould part during moulding
Description
8101760-0 varigenom elementet först efter uttagning ur gjutformen er- håller sin slutliga form. 8101760-0 whereby the element only after removal from the mold receives its final shape.
.Det fjädrande elementet enligt uppfinningen gjuts i en form som innefattar åtminstone en formhalva med ett formhålrum, som omsluter en formkärna, vilken uppvisar ett övergångspar- ti som sträcker sig över väsentligen hela bredden av formhâl- rummet och som är utfört i ett sammanhängande stycke med for- men. Formen enligt uppfinningen kännetecknas av en kylkanal, som är förlagd i formen utanför formhålrummet och i anslut- ning till kärnans spets eller motsvarande. När den gjutna pro- dukten uttages ur formen finns ett gap mellan elementets tunga och dess motstående ben, men efter en kort tid går gapet ihop och tungan kommer till kontakt med benet eller motsvarande.The resilient element according to the invention is cast in a mold comprising at least one mold half with a mold cavity enclosing a mold core, which has a transition portion extending over substantially the entire width of the mold cavity and which is made in a continuous piece with form. The mold according to the invention is characterized by a cooling duct, which is located in the mold outside the mold cavity and in connection with the tip of the core or the like. When the cast product is removed from the mold, there is a gap between the tongue of the element and its opposite bone, but after a short time the gap merges and the tongue comes into contact with the bone or the like.
De exakta fysikaliska förloppen som därvid utspelar sig är inte kända, men det kan förmodas att den enligt förfarandet uppkomna temperaturskillnaden mellan kärnan och den del av formen, som omger formhålrummet, i kombination med plastmate- rialens krympningsegenskaper är av avgörande betydelse för fenomenet. Klart är också att spänningar byggs in i den fär- diga klämman, att dessa spänningar åstadkommer ett tryck mel- lan tungan och benet och att spänningarna inte försvinner ävenfom klämman hålls utspänd under långa tidsperioder.The exact physical processes that take place are not known, but it can be assumed that the temperature difference arising according to the process between the core and the part of the mold which surrounds the mold cavity, in combination with the shrinkage properties of the plastic material, is of crucial importance for the phenomenon. It is also clear that tensions are built into the finished clamp, that these tensions create a pressure between the tongue and the leg and that the tensions do not disappear even if the clamp is kept taut for long periods of time.
De för uppfinningen utmärkande särdragen framgår av de bifo- gade patentkraven.The features characteristic of the invention appear from the appended claims.
Uppfinningen kommer att beskrivas närmare nedan i anslutning till de bifogade ritningarna, i vilka fig. 1 visar en sek- tionsvy av en form för framställning av ett fjädrande element i form av en klämma, fig. 2 visar en plan vy ovanifrân av den i fig. 1 visade undre formhalvan och fig. 3 är en perspektiv- vy av den färdiga klämman.The invention will be described in more detail below in connection with the accompanying drawings, in which Fig. 1 shows a sectional view of a mold for producing a resilient element in the form of a clamp, Fig. 2 shows a plan view from above of the one in Figs. 1 shows the lower mold half and Fig. 3 is a perspective view of the finished clamp.
Fig. 1 visar en av två formhalvor 1, 2, bestående form. Medelst icke visade, konventionella organ bringas formhalvorna till ' tät anliggning mot varandra utmed den visade delningslinjen 3. 8101760-0 'Formhalvorna har varsitt formhålrum 4, 5 som tillsammans bil- dar formen för den färdiga produkten. Medelst stavar eller pinnar 6, vilka är förskjutbara i den undre formhalvan 1, stöts den gjutna produkten ut ur den undre formhalvan (efter det att den övre formhalvan 2 först avlägsnats). En ej visad formsprutmaskin av konventionell typ ansluts till ett inlopp 7 för insprutning av uppvärmd plastmassa genom en inloppska- nal 8, s.k. ingöt till formhålrummen 4, 5. En kylkanal 9 sträcker sig runt formhålrummen 4, 5. Kylkanalen 9 har ett inlopp 10 och ett utlopp 11.Fig. 1 shows a mold consisting of two mold halves 1, 2. By means of conventional means (not shown), the mold halves are brought into close abutment with each other along the shown dividing line 3. The mold halves each have mold cavities 4, 5 which together form the mold for the finished product. By means of rods or pins 6, which are displaceable in the lower mold half 1, the molded product is ejected from the lower mold half (after the upper mold half 2 has first been removed). An injection molding machine of conventional type (not shown) is connected to an inlet 7 for injecting heated plastic mass through an inlet duct 8, so-called molded into the mold cavities 4, 5. A cooling channel 9 extends around the mold cavities 4, 5. The cooling channel 9 has an inlet 10 and an outlet 11.
Fig. 2 visar en plan vy av den undre formhalvan. Som framgår av figuren finns två formhålrum 5, som vart och ett är avsett för framställning av varsin klämma. Ingötet 8 står i förbin- delse med vardera formhålrummet via den visade kanalen 12.Fig. 2 shows a plan view of the lower mold half. As can be seen from the figure, there are two mold cavities 5, each of which is intended for the production of each clamp. The ingot 8 is connected to each of the mold cavities via the channel 12 shown.
Varje formhâlrum 5 omsluter en kärna 13 som vid ett övergångs- parti 14 bildar ett sammanhängande stycke med formhalvan 1.Each mold cavity 5 encloses a core 13 which at a transition portion 14 forms a continuous piece with the mold half 1.
Den minsta tjockleken D av övergångspartiet 14 bestäms av me- kaniska hâllfasthetskrav. Kylkanalen 9 sträcker sig runt de två formhålrummen på det visade sättet. Det är viktigt att kylning sker av formen i området runt det omböjda partiet 15, dvs. det parti som skall bilda ett avsnitt med fjädringsför- måga i den färdiga produkten.The minimum thickness D of the transition portion 14 is determined by mechanical strength requirements. The cooling channel 9 extends around the two mold cavities in the manner shown. It is important that cooling takes place of the mold in the area around the bent portion 15, i.e. the batch which is to form a section with resilience in the finished product.
Gjutning sker på inom plastformningstekniken känt sätt. Kyl- medium ansluts till inloppet 10 och avleds vid utloppet 11.Casting takes place in a manner known in plastic molding technology. Coolant is connected to the inlet 10 and diverted at the outlet 11.
En konventionell, icke visad formsprutmaskin fylls med plast- material i form av granulat eller liknande, som värms upp till flytande tillstånd. Formsprutan anbringas mot den i fig. 1 visade övre delen av ingötet 8 och varm flytande plastmassa sprutas in i formhålrummen 5. Den varma plastmassan värmer kärnorna 13 samtidigt som kylmediet kyler de omböjda partier- na 15. Efter formhålrummens fullständiga fyllning kvarhålls formhalvorna under högt tryck slutna mot varandra, till dess att plastmassan genom kylningen bringats från flytande till fast tillstånd, innan formhalvan 2 avlägsnas och pinnarna 6 därefter får stöta ut de båda klämmorna ur den undre form- halvan 1. Omedelbart efter utstötningen har klämmorna ett gap ,. ......-.~....._.,-_ .- _.. 3101760-o mellan tungan 16 (fig. 3) och benet 17, vilket gap således be- stäms av avståndet D. Efter kort tid går emellertid detta gap ihop ooh :ungen 16 kommer till kontakt med benet 17. Efter ut- stötningen fixeras den övre formhalvan 2 på den undre och för- loppet upprepas. Under hela tiden kan kylmediet, som lämpli- gen utgörs av kylvatten, föras igenom kanalen 9.A conventional injection molding machine (not shown) is filled with plastic material in the form of granules or the like, which is heated to a liquid state. The injection molding is applied to the upper part of the ingot 8 shown in Fig. 1 and hot liquid plastic mass is injected into the mold cavities 5. The hot plastic mass heats the cores 13 while the coolant cools the bent portions 15. After the filling of the mold cavities is completely maintained under high pressure closed to each other, until the plastic mass has been brought from the liquid to the solid state by the cooling, before the mold half 2 is removed and the pins 6 are then allowed to eject the two clamps from the lower mold half 1. Immediately after the ejection, the clamps have a gap,. ......-. ~ ....._., -_ .- _ .. 3101760-o between the tongue 16 (fig. 3) and the leg 17, which gap is thus determined by the distance D. After shortly, however, this gap merges ooh: the kid 16 comes into contact with the leg 17. After the ejection, the upper mold half 2 is fixed on the lower one and the process is repeated. At all times, the coolant, which suitably consists of cooling water, can be passed through the channel 9.
Enligt en modifiering av sättet enligt uppfinningen bryts kylvattentillförseln efter utstötningen av de gjutna produk- terna och âterupptages inte förrän ny varm plastmassa sprutas in i førmhålrummen.According to a modification of the method according to the invention, the cooling water supply is interrupted after the ejection of the cast products and is not resumed until new hot plastic mass is injected into the mold cavities.
Av det ovanstående är det tydligt att kärnorna 13 kommer att bilda ett varmt område i formen medan formens områden utmed .kylkanalerna är relativt sett svalare.From the above it is clear that the cores 13 will form a hot area in the mold while the areas of the mold along the cooling channels are relatively cooler.
Enligt en ytterligare utföringsform av uppfinningen kan varje formhalva uppvisa tre eller flera med lämplig geometri pla- cerade formhålrum 5 varigenom ett stort antal enheter av pro- dukten kan gjutas samtidigt. Kylkanalen förläggs därvid så att den passerar utmed de omböjda partierna 15 av samtliga enheter.According to a further embodiment of the invention, each mold half can have three or more mold cavities placed with suitable geometry, whereby a large number of units of the product can be cast simultaneously. The cooling duct is then arranged so that it passes along the bent portions 15 of all units.
Fastän uppfinningen visats med användande av en enda kylka- nal 9 kan givetvis flera separata kylkanaler användas.Although the invention has been shown using a single cooling duct 9, several separate cooling ducts can of course be used.
Claims (7)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8101760A SE428447B (en) | 1981-03-19 | 1981-03-19 | SET TO MAKE A RESISTANT ELEMENT OF PLASTIC |
DE19823237444 DE3237444A1 (en) | 1981-03-19 | 1982-03-19 | SPRING ELEMENT AND A METHOD AND DEVICE FOR ITS PRODUCTION |
PCT/SE1982/000079 WO1982003204A1 (en) | 1981-03-19 | 1982-03-19 | A resilient element and a method and a device for the production thereof |
DK510482A DK147538C (en) | 1981-03-19 | 1982-11-16 | PROCEDURE AND FORM FOR MANUFACTURING A SPRING CLIP |
NO823855A NO157208C (en) | 1981-03-19 | 1982-11-17 | PROCEDURE AND DEVICE FOR MANUFACTURING A REMOVING ELEMENT. |
SE8207050A SE438632B (en) | 1981-03-19 | 1982-12-09 | SPRING ELEMENT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8101760A SE428447B (en) | 1981-03-19 | 1981-03-19 | SET TO MAKE A RESISTANT ELEMENT OF PLASTIC |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8101760L SE8101760L (en) | 1982-09-20 |
SE428447B true SE428447B (en) | 1983-07-04 |
Family
ID=20343375
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8101760A SE428447B (en) | 1981-03-19 | 1981-03-19 | SET TO MAKE A RESISTANT ELEMENT OF PLASTIC |
SE8207050A SE438632B (en) | 1981-03-19 | 1982-12-09 | SPRING ELEMENT |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8207050A SE438632B (en) | 1981-03-19 | 1982-12-09 | SPRING ELEMENT |
Country Status (3)
Country | Link |
---|---|
DK (1) | DK147538C (en) |
SE (2) | SE428447B (en) |
WO (1) | WO1982003204A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006003545B4 (en) | 2006-01-24 | 2012-06-06 | "Durable" Hunke & Jochheim Gmbh & Co. Kg | Designed as an injection molded part nameplate and method for producing this nameplate |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1187966A (en) * | 1966-06-03 | 1970-04-15 | W & J Jarvis Ltd | Improved Attachment Means for Sheets of Paper and the like. |
FR1527582A (en) * | 1967-06-16 | 1968-05-31 | Attachment for documents |
-
1981
- 1981-03-19 SE SE8101760A patent/SE428447B/en not_active IP Right Cessation
-
1982
- 1982-03-19 WO PCT/SE1982/000079 patent/WO1982003204A1/en active Application Filing
- 1982-11-16 DK DK510482A patent/DK147538C/en not_active IP Right Cessation
- 1982-12-09 SE SE8207050A patent/SE438632B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8207050L (en) | 1982-12-09 |
WO1982003204A1 (en) | 1982-09-30 |
DK510482A (en) | 1982-11-16 |
SE438632B (en) | 1985-04-29 |
SE8101760L (en) | 1982-09-20 |
SE8207050D0 (en) | 1982-12-09 |
DK147538B (en) | 1984-09-24 |
DK147538C (en) | 1985-03-18 |
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