CN102026751A - Mold for injection molding of cutting tool inserts having air gap of controlled width and method of making such inserts - Google Patents
Mold for injection molding of cutting tool inserts having air gap of controlled width and method of making such inserts Download PDFInfo
- Publication number
- CN102026751A CN102026751A CN2009801175744A CN200980117574A CN102026751A CN 102026751 A CN102026751 A CN 102026751A CN 2009801175744 A CN2009801175744 A CN 2009801175744A CN 200980117574 A CN200980117574 A CN 200980117574A CN 102026751 A CN102026751 A CN 102026751A
- Authority
- CN
- China
- Prior art keywords
- air gap
- cutting tool
- width
- edge
- tool insert
- 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
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 56
- 238000001746 injection moulding Methods 0.000 title description 11
- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims description 13
- 238000012797 qualification Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004634 thermosetting polymer Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
Abstract
A mold is provided for making a cutting tool insert from a material to be molded, the cutting tool insert having an edge defined by two intersecting surfaces. The mold includes a first surface, a second surface intersecting with the first surface to define an edge, and an air gap between the first surface and the second surface at the edge, the width of the air gap varying in a controlled way along its length. A method for making a cutting tool insert is also disclosed.
Description
Technical field
The present invention relates to a kind ofly have injection molding mould air gap, that be used for cutting tool insert of controlled width and make this method with blade of the cutting edge that has improved character.
Background technology
Usually utilize by wet-milling be mixed into slurries, with slurry dried become to have good flow character powder, the powder uniaxially is pressed into the parts with desired shape and the powder metallurgy process manufacturing cutting tool insert that made by carbide alloy, cermet, pottery etc., that be used for metal processing of sintering.Using unidirectional compacting in large-scale production is easily.Yet it has applied certain restriction for the shape with manufactured product.
Injection moulding is general in plastics industry, and the material that wherein comprises thermoplastic or thermosetting polymer is heated and is forced in the mold cavity with desired shape.When using in powder technology, this method often is known as metal injection molded (MIM).Multifunctionality that it combines injection-moulding plastic and intensity and integrality through processing, compacting or little, the complicated metal parts otherwise made.This technology comprises mixes tiny metal dust and plastic binder, the plastic-injection moulding machine device that this plastic binder allows the use standard with metal injection in mould.Utilize solvent and thermal process to remove binding agent then, and final sintered component.Metal injection molded parts for example obtain using in aviation, the automobile etc. in the range of application of broadness.The advantage of MIM is to produce has small size parts good tolerance, that have complicated shape.Therefore MIM is used in also that make in the hard carbide industry can not be by unidirectionally extruded that make, that have complicated shape easily blade.
Cutting tool insert must have cutting edge sharp keen and that improve qualification.Because the air of carrying secretly in the mold cavity, the cutting edge of injection cutting tool insert will not be enough sharp keen.Therefore, use air gap, so that air is overflowed along parting line or mold insert.This is being resolved by the air gap or the gap of using fixed qty between cutter member before, and therefore makes the cutting edge that is very difficult to avoid burr and/or sphering.Usually be necessary on the cutting tool insert that forms in this way, to carry out grinding action to obtain and the similar cutting edge of cutting edge that can obtain by traditional powder pressing operation.
The providing of expectation have sharp keen cutting edge, by the injection cutting tool insert that MIM forms, avoid producing the cutting edge of excessive burr or sphering simultaneously.Also the expectation be provided for producing this cutting tool insert mould and method.
Summary of the invention
According to an aspect of the present invention, provide the mould that is used for making by MIM cutting tool insert, described cutting tool insert has the cutting edge that is limited by two intersection surface.This mould comprises first surface, intersects limiting the second surface at edge with first surface, and in edge the air gap between first surface and second surface, the width of this air gap changes in a controlled manner along its length.
According to another aspect of the present invention, provide a kind of method that is used for making at mould cutting tool insert, this cutting tool insert has the cutting edge that is limited by two intersection surface.According to this method, the material that is used to form cutting tool insert is forced in the mold cavity with first surface and second surface, and first surface and second surface limit the edge.By the air gap between first surface and second surface removes air from mold cavity in edge, the width of this air gap changes in a controlled manner along its length.
Description of drawings
Fig. 1 illustrates the metal injection molded machine that has mould.
Fig. 2 is the side viewgraph of cross-section of mould according to an aspect of the present invention.
Fig. 3 is the top view of the example mould that obtains of separation place between mold component 10 and 11.
Fig. 4 is the perspective view with cutting tool insert of the type that utilization mould according to an aspect of the present invention makes.
Fig. 5 is the perspective view of a part of mould according to an aspect of the present invention, and the air gap that width changes along length is shown.
Fig. 6 is the side viewgraph of cross-section of mould according to another aspect of the present invention.
The specific embodiment
In Fig. 1, the summary signal of injection moulding machine and mould 21 is shown.Material 25 is injected in one or more mold cavity 41.Also therefore limiting mold cavity 41 forms mould 21 by closing molding member 10,11 and 12.
In Fig. 1 and Fig. 2, seen in further detail and being used for from treating to be made the mould 21 of cutting tool insert 23 (Fig. 4) by the material 25 of moulding.As see ground in Fig. 4, cutting tool insert 23 has by two intersection surface 29 and 31 cutting edges that limit 27.Mould 21 comprises first surface 33 and intersects to limit the second surface 35 at edge 37 with first surface.
The width of air gap 39 changes on width in a controlled manner along its length.The minimum widith of air gap 39 is 0-5 μ m, and the Breadth Maximum of air gap reaches 20 μ m.The width of air gap 39 will be usually as influence treat by the material 25 of moulding, flowing changes with the function of the factor of the ability in the space of filling neighboring edge 37.
For example, as in the injection moulding as shown in Fig. 1,2 and 3 operation, the width of air gap 39 changes as the function of the distance at distance sprue gate 47.Fig. 5 illustrates by two intersection surface 33 and 35 edges that limit 37, has air gap 39 in edge.The width of air gap 39 from the Breadth Maximum W1 of the point 48 of the nose that is used to form cutting tool insert to away from described nose but more changing along its length near the width smaller W2 at the some place at sprue gate 47.
The width of air gap 39 is incited somebody to action usually the function of conduct pressure at 37 places at the edge and is changed.For example, along with flow front 43 more away from sprue gate 47, pressure at the flow front place reduce usually and become more and more be difficult to force air from mold cavity by have with more near the air gap of the identical width of the width of the point at sprue gate 47, and bigger air gap is convenient to air and is overflowed.
The width of air gap 39 is as treating to be changed by the function of the characteristic of the material 25 of moulding.For example, along with material 25 more away from sprue gate 47, its temperature trends towards lower and it also trends towards toughness more.Lower and/or its more sticking some place in the temperature of material, compare when low with and its viscosity higher when the temperature of material, it is useful making air gap bigger.
As in Fig. 4, seeing, for forming cutting tool insert 23, think that mould 21 is useful especially, described cutting tool insert 23 is the forms that have the cutting tip of cutting edge 27.This blade usually by from the organic binder bond moulded blade of mixing with cemented carbide powder and subsequently sintering form to form finished product.As in the process of injection molding of in Fig. 1 and Fig. 2, seeing, relative to each other closed with after forming mold cavity at mold component 10,11 and 12, by sprue gate 47 powder and binder mixtures are introduced mold cavity 41.
Though the air gap 39 in the edge of the cutting edge that is used to form cutting tip is useful especially for requiring for the cutting edge seldom or that do not require any processing subsequently after being formed on sintering, but as in Fig. 6, seeing, can also air gap 49 be set at parting line 51 places that limit by the pin 53 of mould at least in part.Similarly, form air gap 55 at 57 places, bight that limit by the core rod 59 of mould at least in part.Any position in mold cavity is provided with air gap, in described position, may expect to discharge air so that form feature on treating by the cutting tool insert of moulding.The width of this air gap be change so that discharge air.
Though air gap 39 can have various suitable forms, Fig. 2 illustrates a kind of useful especially form of thinking at present.Air flow channel 45 forms in first mold component 10 basically fully, and second mold component 11 is formed with shallow recess 65.The degree of depth that changes shallow recess 65 is considered to the simplest at present with the width that changes air gap.For example, shallow recess 65 can have the degree of depth of 0-5 μ m and have the degree of depth that reaches 20 μ m at the depth capacity place at the most shallow degree of depth place.
One aspect of the present invention also relates to a kind of method that is used for making at mould 21 cutting tool insert 23.Cutting tool insert 23 has by two intersection surface 29 and 31 cutting edges that limit 27.According to this method, the material 25 that is used to form cutting tool insert 23 is forced in the mold cavity 41 with first surface 33 and second surface 35.First surface 33 and second surface 35 limit edge 37.Air is overflowed from mold cavity 41 by the first surface 33 and the air gap 39 between the second surface 35 at 37 places, edge.The size of air gap 39 changes on width in a controlled manner.
In the injection moulding operation, treat to be injected in the mold cavity 41 by sprue gate 47 by the material 25 of moulding.The width of air gap 39 is as the function of the distance at distance sprue gate 47 and change.The width of air gap 39 injects by the simulation moulding to be optimized, thereby make the width of air gap for example depend on 47 distance and act on these factors of pressure on the material, thereby but optimizing air removes and avoid forming burr in edge along air gap apart from the sprue gate.By making in this way, therefore may powder injection-moldedly produce cutting tool insert, and not need grinding to come the available cutting edge of generation on cutting tool insert basically by using to clean shape.
The mould that is used for process of injection molding by use injects simulation, may calculate material 25 and act on time and pressure on the air gap, also has it is so done under what temperature.During the injection of material 25, near sprue gate 47, material 25 is warmmer usually, and has lower viscosity, and acts on for more time on the air gap 39, and for fear of burr, air gap 39 should be less, is 0-5 μ m.When material 25 flowed away from sprue gate 47 more, temperature reduced, and this has increased viscosity, and the pressure that acts on the air gap 39 descends.This combines with the amount of entrained air that increases, and it is useful making the width of air gap 39 increase to 20 μ m, reaches Breadth Maximum until it at the rearmost point place that mold cavity 41 is injected.Other entrapped air point also can be discerned, and for example sells 53 and core rod 59, and air gap can correspondingly obtain revising.
The key factor that successful air gap is revised is the knowledge that characteristic character, Tool Design and the mould of moulding material 25 injects simulation process.In order to produce the clean shape injection-molded product that has with those similar cutting edge character that produce by standard powder compaction process after sintering, it is crucial that air gap is revised.
The present invention has been described with reference to cutting tool insert.Be apparent that it can also be applied to other products, in described other products, blade sharp keen, that improve qualification has importance for product property.
The application require disclosure among the Swedish patent application No.0801071-2 of priority at this by with reference to being merged in.
Claims (10)
1. one kind is used for from treating to be made by the material of moulding (25) mould (21) of cutting tool insert (23), and described cutting tool insert has the cutting edge (27) that is limited by two intersection surface (29,31), and described mould (21) comprising:
First surface (33),
With the crossing second surface (35) of described first surface with qualification edge (37), and
Locate to be positioned at air gap (39) between described first surface (33) and the described second surface (35) in described edge (37), it is characterized in that the width of described air gap (39) changes in a controlled manner along its length.
2. mould according to claim 1 is characterized in that, the minimum widith of described air gap (39) is 0-5 μ m.
3. mould according to claim 2 is characterized in that, the Breadth Maximum of described air gap (39) reaches 20 μ m.
4. mould according to claim 1 is characterized in that, the Breadth Maximum of described air gap (39) reaches 20 μ m.
5. mould according to claim 1 comprises sprue gate (47), it is characterized in that, the width of described air gap (39) is as changing apart from the function of the distance at described sprue gate.
6. mould according to claim 1 is characterized in that, the width of described air gap (39) is as changing at the function of the pressure of described edge.
7. mould according to claim 1 is characterized in that, the width of described air gap (39) is changed by the function of the characteristic of the material of moulding (25) as described treating.
8. mould according to claim 1 is characterized in that, the width of described air gap (39) is changed by the function of the temperature of the material of moulding as described treating.
9. method that is used for making cutting tool insert (23) at mould (21), described cutting tool insert has the cutting edge (27) that is limited by two intersection surface (29,31), and described method comprises:
The material (25) that will be used to form described cutting tool insert (23) is expelled in the mold cavity (41) of have first surface (33) and second surface (35), and described first surface (33) and described second surface (35) limit edge (37), and
Air is overflowed from described mold cavity (41) by the air gap of locating in described edge (37) to be positioned between described first surface (33) and the described second surface (35) (39), it is characterized in that the width of described air gap (39) changes in a controlled manner along its length.
10. method according to claim 9 comprises: will treat to be expelled in the described mold cavity (41) by the material of moulding (25) by sprue gate (47), and it is characterized in that, the width of described air gap (39) is as changing apart from the function of the distance at described sprue gate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0801071A SE533916C2 (en) | 2008-05-13 | 2008-05-13 | Form for injection molding of cutter tools having an air gap of controlled width and a method of making such cutters |
| SE0801071-2 | 2008-05-13 | ||
| PCT/SE2009/050506 WO2009139700A1 (en) | 2008-05-13 | 2009-05-08 | Mold for injection molding of cutting tool inserts having air gap of controlled width and method of making such inserts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102026751A true CN102026751A (en) | 2011-04-20 |
| CN102026751B CN102026751B (en) | 2013-10-30 |
Family
ID=41318915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801175744A Expired - Fee Related CN102026751B (en) | 2008-05-13 | 2009-05-08 | Mold for injection molding of cutting tool inserts having air gap of controlled width and method of making such inserts |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110189046A1 (en) |
| CN (1) | CN102026751B (en) |
| DE (1) | DE112009001138T5 (en) |
| SE (1) | SE533916C2 (en) |
| WO (1) | WO2009139700A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030287A (en) * | 2015-09-29 | 2017-08-11 | 山特维克知识产权股份有限公司 | The mould and method of powder injection molding hard alloy or cermet components |
| CN107921534A (en) * | 2015-09-01 | 2018-04-17 | 京瓷株式会社 | The manufacture method of cutting element blade |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10022845B2 (en) | 2014-01-16 | 2018-07-17 | Milwaukee Electric Tool Corporation | Tool bit |
| JP6603083B2 (en) * | 2015-09-01 | 2019-11-06 | 京セラ株式会社 | Cutting tool insert manufacturing method |
| JP6603082B2 (en) * | 2015-09-01 | 2019-11-06 | 京セラ株式会社 | Cutting tool insert manufacturing method |
| WO2017038929A1 (en) * | 2015-09-01 | 2017-03-09 | 京セラ株式会社 | Method for manufacturing tip for cutting tool |
| JP6618746B2 (en) * | 2015-09-28 | 2019-12-11 | 京セラ株式会社 | Cutting tool insert manufacturing method |
| JP6723010B2 (en) * | 2015-12-25 | 2020-07-15 | 京セラ株式会社 | Cutting tool tip and manufacturing method thereof |
| JP6758604B2 (en) * | 2016-09-21 | 2020-09-23 | 株式会社タンガロイ | Cutting insert and its manufacturing method |
| CN212351801U (en) | 2017-12-01 | 2021-01-15 | 米沃奇电动工具公司 | Tool head for driving fasteners |
| USD921468S1 (en) | 2018-08-10 | 2021-06-08 | Milwaukee Electric Tool Corporation | Driver bit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB792351A (en) * | 1954-12-27 | 1958-03-26 | Shenango China Inc | Dies for pressing green ceramic objects |
| DE2836096A1 (en) * | 1978-08-17 | 1980-03-06 | Demag Kunststofftech | METHOD AND DEVICE FOR PRODUCING CERAMIC MOLDINGS IN THE WAY OF INJECTION MOLDING |
| US4473526A (en) * | 1980-01-23 | 1984-09-25 | Eugen Buhler | Method of manufacturing dry-pressed molded articles |
| DE3713334A1 (en) * | 1987-04-21 | 1988-11-03 | Krupp Gmbh | PRESSING TOOL AND CUTTING INSERT SEMINATED FROM A GRUENLING THEREFORE |
| JP2002346716A (en) * | 2001-05-24 | 2002-12-04 | Toyota Industries Corp | Die-casting die |
| US20060047309A1 (en) * | 2004-08-25 | 2006-03-02 | Cichocki Frank R Jr | Metal injection molded suture needles |
-
2008
- 2008-05-13 SE SE0801071A patent/SE533916C2/en not_active IP Right Cessation
-
2009
- 2009-05-08 WO PCT/SE2009/050506 patent/WO2009139700A1/en active Application Filing
- 2009-05-08 US US12/992,602 patent/US20110189046A1/en not_active Abandoned
- 2009-05-08 DE DE112009001138T patent/DE112009001138T5/en not_active Withdrawn
- 2009-05-08 CN CN2009801175744A patent/CN102026751B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107921534A (en) * | 2015-09-01 | 2018-04-17 | 京瓷株式会社 | The manufacture method of cutting element blade |
| CN107921534B (en) * | 2015-09-01 | 2020-05-29 | 京瓷株式会社 | Method for manufacturing cutting insert for cutting tool |
| CN107030287A (en) * | 2015-09-29 | 2017-08-11 | 山特维克知识产权股份有限公司 | The mould and method of powder injection molding hard alloy or cermet components |
| CN107030287B (en) * | 2015-09-29 | 2020-06-16 | 山特维克知识产权股份有限公司 | Moulding tool and method for powder injection moulding of cemented carbide or cermet parts |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009139700A1 (en) | 2009-11-19 |
| US20110189046A1 (en) | 2011-08-04 |
| SE533916C2 (en) | 2011-03-01 |
| DE112009001138T5 (en) | 2011-05-26 |
| CN102026751B (en) | 2013-10-30 |
| SE0801071L (en) | 2009-11-14 |
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Granted publication date: 20131030 Termination date: 20200508 |