CN207735592U - A kind of hot shaping tool of green compact for injection forming product - Google Patents
A kind of hot shaping tool of green compact for injection forming product Download PDFInfo
- Publication number
- CN207735592U CN207735592U CN201721701396.8U CN201721701396U CN207735592U CN 207735592 U CN207735592 U CN 207735592U CN 201721701396 U CN201721701396 U CN 201721701396U CN 207735592 U CN207735592 U CN 207735592U
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- China
- Prior art keywords
- green compact
- injection forming
- hot shaping
- forming product
- shaping tool
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- 238000007493 shaping process Methods 0.000 title claims abstract description 33
- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 abstract description 11
- 238000005245 sintering Methods 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000246 remedial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- Producing Shaped Articles From Materials (AREA)
Abstract
The utility model discloses a kind of hot shaping tools of the green compact for injection forming product, including pedestal, and by fixing screws and the fixed lower baffle plate of pedestal, single-acting cylinder and limited block, and the module being removably mounted between lower baffle plate and limited block；The module includes cope plate, and the upper cores being fixedly mounted by screw and cope plate, and the lower mode being fixedly mounted by screw and lower baffle plate；The lower mode is equipped with guide post, and upper cores are molded by guide post and the positioning of lower mode；The single-acting cylinder is equipped with one-way piston bar；The one-way piston bar is connected across limited block with cope plate；The hot shaping tool of green compact for injection forming product of the utility model, pass through the curvature difference between the hot shaping effective compensation green compact of green compact and ceramic block, improve the green compact deformation caused by residual stress and surface tension effects simultaneously, keep green compact seamless applying with ceramic block, sintering problem of Cracking is effectively solved, mold complex redundancy is avoided to design.
Description
Technical field
The utility model is related to a kind of green compact shaping tools for powder injection forming, and in particular to one kind is for injecting
The hot shaping tool of green compact of formed product, belongs to injection molding technology field.
Background technology
Metal or ceramic powder end and high polymer binder mixing are mixed to get by powder injection forming by injection molding machine
Feeding is injected into the part that specific shape is prepared in mold, and part status is known as green compact at this time, and green compact pass through degreasing, sintering again
Final finished is obtained with processes such as post-processings；A certain proportion of dimensional contraction can occur in sintering process for green compact；Therefore it is setting
It needs to amplify product when counting mold cavity size, amplification coefficient is the contraction factor of feeding itself, injects to obtain through mold
Green sintering shrink after right up to expected finished size.
For the special-shaped product with globoidal structure, the curvature after amplification at green compact globoidal structure is less than finished product, takes off
Due to expanding with heat and contract with cold and surface tension effects, globoidal structure curvature further decrease after mould；It is actually that product sintering is avoided to become
Shape needs to make sintering support by designing the ceramic block to match with finished size；Therefore, the green compact and ceramic block after injection
It can cause the two cambered surface face cannot be seamless applying because of curvature difference, to which vacant state occur in green compact cambered surface both wings；Product is de-
Cohering for binder is lost after fat is sintered, bond strength is extremely low between metal or ceramic powder end, and vacantly place can be because of gravity for product
It deforms with wind-force double action, gently then generating micro-crack in interiors of products influences mechanical property after sintering, heavy then cause to produce
Product cracking is directly scrapped.
A kind of common remedial measure is to be adapted to the radius of curvature of green compact when mould structure designs to meet ceramic block
Radius of curvature, it is contemplated that adjustment green compact radius of curvature necessarily affects local size after sintering, therefore is needed again to product office
Portion's structure makees design adjustment；But this remedial measure is larger to the design change of product, to the requirement of mold designer's professional standards
It is higher, and this repair capsule can only be directed to the product of simple in structure and internal no critical dimensional requirements, have labyrinth special
The product that size of seeking peace requires can not be then applicable in.
Utility model content
To solve the above problems, the utility model overcome the green compact with globoidal structure sintering support ceramic block on because
The problem of vacantly leading to degreasing sintered cracking, provide a kind of green compact shaping tool for powder injection forming.
The hot shaping tool of green compact for injection forming product of the utility model, including pedestal, and pass through fixing screws
With the fixed lower baffle plate of pedestal, single-acting cylinder and limited block, and the module that is removably mounted between lower baffle plate and limited block；
The module includes cope plate, and the upper cores being fixedly mounted by screw and cope plate, and by screw under
The lower mode that baffle is fixedly mounted；The lower mode is equipped with guide post, and upper cores are molded by guide post and the positioning of lower mode, on
Mode and lower mode press green compact size deisgn product cavity respectively；
The single-acting cylinder is equipped with the one-way piston bar for driving cope plate and upper cores to move back and forth；It is described unidirectional
Piston rod is connected across limited block with cope plate, and upper cores are axially made by single-acting cylinder along one-way piston bar past with cope plate
Multiple movement.
Further, under molding state, it is formed with cavity between the upper cores and lower mode, life is placed in cavity
Base, upper cores and lower mode are formed with the cavity for green compact to be clamped under molding state, and a green compact correspond to a cavity.
Still further, the green compact and cavity are arcuate structure, its cambered surface radius of curvature of the cavity is equal to finished product
Its cambered surface radius of curvature, and less than its cambered surface radius of curvature of green compact.
Still further, its thickness of the cavity is equal to its thickness of green compact.
As preferred embodiment, the upper cores are made of bakelite.
As preferred embodiment, the lower mode is made of elastic plastic.
As preferred embodiment, the lower baffle plate and cope plate are brass.
Further, the through-hole of curvilinear structures is offered in the lower baffle plate.
Still further, the through-hole one end is provided with water inlet, the other end is provided with water outlet, and jig works
When entery and delivery port cooling water tank is connected to by water pipe respectively, recirculated water continues in lower baffle plate internal flow to reduce jig temperature
Degree.
Further, the green compact shaping tool work step is as follows：
The green compact of the first step, injection moulding are gripped by manipulator or this field operating personnel to the jig after die sinking
Side；
Second step, single-acting cylinder switch are closed, and unidirectional piston rod is together with upper under the spring effect in single-acting cylinder
Template and upper cores retreat together, and upper cores are detached with lower mode realizes die sinking action；
Third walks, and the lower mode cavity is put the green body by manipulator inductor or this field operating personnel；
4th step, single-acting cylinder switch start, and one-way piston bar advances together together with cope plate and upper cores, upper cores
Mould assembling action is realized with lower mode, and green compact are squeezed by mode occurs plastic deformation, until cambered surface face is bonded completely；
5th step, green compact, which have cooled and solidified, after pressurize for a period of time no longer rebounds, and single-acting cylinder switch is closed, living
Stopper rod drives cope plate and upper cores to retreat together and realizes die sinking action, and green compact are transferred under ceramic block and entrance after taking out shaping
One bout recycles successively.
As preferred embodiment, those skilled in the art can according to product structure and size, described in designed, designed on
Cavity quantity between mode and lower mode, also can be by replacing upper cores and lower mode to realize the green compact of different injection products
Shaping.
As preferred embodiment, the temperature before its shaping of the green compact is 110-160 DEG C, and the temperature of recirculated water is
20-25 DEG C, dwell time 8-30s.
Compared with prior art, the hot shaping of the green compact for injection forming product of the utility model is controlled
Tool efficiently solves the green compact with globoidal structure by the hot shaping of green compact and is bonded caused by curvature difference vacantly with ceramic block
Problem efficiently solves sintering problem of Cracking；Meanwhile somewhat complex design amendment and local structural adjustment when avoiding Mold Making,
It is applicable not only to simple structure, and equally applicable to the product complicated, that size tolerance requirements are harsh in part, objective for implementation
Extensively, simple and convenient；Furthermore it is also possible to coordinate injector, manipulator one note one of synchronization whole, pipelining, therefore
There is important practical value in industrial production.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the jig of the utility model embodiment 1.
Fig. 2 is the dimensional structure diagram of the shaping object belt fastener green compact of the utility model embodiment 1.
Fig. 3 is the lower mode dimensional structure diagram of the jig of the utility model embodiment 1.
Fig. 4 is the upper cores dimensional structure diagram of the jig of the utility model embodiment 1.
Fig. 5 is the lower baffle plate dimensional structure diagram of the jig of the utility model embodiment 1.
Fig. 6 is the lower baffle plate cross-sectional view of the jig of the utility model embodiment 1.
Each component is labeled as in attached drawing：1- pedestals, 2- single-acting cylinders, 3- cope plates, 4- upper cores, mode under 5-, 6-
Lower baffle plate, 7- limited blocks, 8- guide posts, 9- one-way piston bars, 10- cavities, 11- belt fastener green compact, 12- through-holes, 13- water inlets,
14- water outlets.
Specific implementation mode
Embodiment 1：
Life for injection forming product (injection forming product is specially belt buckle product) as shown in Figures 1 to 6
The hot shaping tool of base, including pedestal 1, and pass through fixing screws and 1 fixed lower baffle plate 6 of pedestal, single-acting cylinder 2 and limited block
7, and the module that is removably mounted between lower baffle plate 6 and limited block 7；
The module includes cope plate 3, and the upper cores 4 being fixedly mounted by screw and cope plate 3, and by screw with
The lower mode 5 that lower baffle plate 6 is fixedly mounted；The lower mode 5 is equipped with guide post 8, and upper cores 4 are fixed by guide post 8 and lower mode 5
Position molding；
The single-acting cylinder 2 is equipped with the one-way piston bar 9 for driving cope plate 3 and upper cores 4 to move back and forth；It is described
One-way piston bar 9 is connected across limited block 7 with cope plate 3.
Under molding state, it is formed with cavity 10 between the upper cores 4 and lower mode 5, belt is placed in cavity 10
Detain green compact 11.
The belt fastener green compact 11 and cavity 10 are arcuate structure, its cambered surface radius of curvature of the cavity 10 is equal to belt
It is fastened as product (not shown) its cambered surface radius of curvature, and less than its cambered surface radius of curvature of belt fastener green compact 11.
Its thickness of the cavity 10 is equal to its thickness of belt fastener green compact 11.
The upper cores 4 are made of bakelite.
The lower mode 5 is made of elastic plastic.
The lower baffle plate 6 and cope plate 3 are brass.
The through-hole 12 of curvilinear structures is offered in the lower baffle plate 6.
12 one end of the through-hole is provided with water inlet 13, and the other end is provided with water outlet 14, and when jig works into,
Water outlet 13,14 is connected to cooling water tank (not shown) by water pipe respectively.
The green compact shaping tool work step is as follows：
First, the belt fastener green compact 11 for just having completed injection moulding demoulding are gripped by manipulator to the jig after die sinking
Top；
Second, the switch of single-acting cylinder 2 is closed, the effect (not shown) of spring of the one-way piston bar 9 in single-acting cylinder 2
Lower drive cope plate 3 and upper cores 4 retreat together, and jig is opened；
Third, manipulator inductor obtain die sinking information and product are put into shaping tool；
4th, the switch of single-acting cylinder 2 is opened, and one-way piston bar 9 pushes cope plate 3 to realize molding, to belt fastener green compact
11 carry out hot shaping, pressurize 25S；
5th, the switch of single-acting cylinder 2 is closed, and mode is opened, and manipulator takes shaping green compact away, and is put into next production
Product recycle successively.
Wherein, the temperature before 11 its shaping of the belt fastener green compact is 130-155 DEG C, and the temperature of recirculated water is 25 DEG C.
The hot shaping tool of green compact for injection forming product of the utility model, is efficiently solved by the hot shaping of green compact
Green compact with globoidal structure are bonded hanging problem with ceramic block caused by curvature difference, efficiently solve sintering cracking and ask
Topic；Meanwhile somewhat complex design amendment and local structural adjustment when avoiding Mold Making, it is applicable not only to simple structure, and right
The product that partial structurtes are complicated, size tolerance requirements are harsh is equally applicable, and objective for implementation is extensive, simple and convenient；In addition, also
Injector, manipulator one note one of synchronization can be coordinated whole, pipelining, therefore there is important practical valence in the industrial production
Value.
Above-described embodiment is only the better embodiment of the utility model, therefore all according to the utility model patent application range
The equivalent change or modification that the structure, feature and principle is done, is included in the scope of the utility model patent application.
Claims (9)
1. a kind of hot shaping tool of green compact for injection forming product, it is characterised in that：Including pedestal, and pass through fixing screws
With the fixed lower baffle plate of pedestal, single-acting cylinder and limited block, and the module that is removably mounted between lower baffle plate and limited block；
The module includes cope plate, and the upper cores being fixedly mounted by screw and cope plate, and passes through screw and lower baffle plate
The lower mode being fixedly mounted；The lower mode is equipped with guide post, and upper cores are molded by guide post and the positioning of lower mode；
The single-acting cylinder is equipped with the one-way piston bar for driving cope plate and upper cores to move back and forth；The one-way piston
Bar is connected across limited block with cope plate.
2. the hot shaping tool of the green compact according to claim 1 for injection forming product, it is characterised in that：In molding shape
Under state, it is formed with cavity between the upper cores and lower mode, green compact are placed in cavity.
3. the hot shaping tool of the green compact according to claim 1 or 2 for injection forming product, it is characterised in that：It is described
Green compact and cavity are arcuate structure, its cambered surface radius of curvature of the cavity is less than life equal to its cambered surface radius of curvature of finished product
Its cambered surface radius of curvature of base.
4. the hot shaping tool of the green compact according to claim 2 for injection forming product, it is characterised in that：The cavity
Its thickness is equal to its thickness of green compact.
5. the hot shaping tool of the green compact according to claim 1 for injection forming product, it is characterised in that：The upper mold
Benevolence is made of bakelite.
6. the hot shaping tool of the green compact according to claim 1 for injection forming product, it is characterised in that：The lower die
Benevolence is made of elastic plastic.
7. the hot shaping tool of the green compact according to claim 1 for injection forming product, it is characterised in that：The lower block
Plate and cope plate are brass.
8. the hot shaping tool of the green compact according to claim 1 for injection forming product, it is characterised in that：The lower block
The through-hole of curvilinear structures is offered in plate.
9. the hot shaping tool of the green compact according to claim 8 for injection forming product, it is characterised in that：The through-hole
One end is provided with water inlet, and the other end is provided with water outlet, and entery and delivery port is connected by water pipe respectively when jig work
To cooling water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721701396.8U CN207735592U (en) | 2017-12-08 | 2017-12-08 | A kind of hot shaping tool of green compact for injection forming product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721701396.8U CN207735592U (en) | 2017-12-08 | 2017-12-08 | A kind of hot shaping tool of green compact for injection forming product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207735592U true CN207735592U (en) | 2018-08-17 |
Family
ID=63117543
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721701396.8U Active CN207735592U (en) | 2017-12-08 | 2017-12-08 | A kind of hot shaping tool of green compact for injection forming product |
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| Country | Link |
|---|---|
| CN (1) | CN207735592U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109128180A (en) * | 2018-10-19 | 2019-01-04 | 萍乡市慧成精密机电有限公司 | A kind of apparatus for shaping of the straight component of rod category of powder injection forming plate |
| CN109226772A (en) * | 2018-11-20 | 2019-01-18 | 深圳艾利佳材料科技有限公司 | A kind of hot shaping methods of high-yield strength powder metallurgy product |
-
2017
- 2017-12-08 CN CN201721701396.8U patent/CN207735592U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109128180A (en) * | 2018-10-19 | 2019-01-04 | 萍乡市慧成精密机电有限公司 | A kind of apparatus for shaping of the straight component of rod category of powder injection forming plate |
| CN109226772A (en) * | 2018-11-20 | 2019-01-18 | 深圳艾利佳材料科技有限公司 | A kind of hot shaping methods of high-yield strength powder metallurgy product |
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| GR01 | Patent grant |