CN106064421A - A kind of complicated ceramic part forming method based on wax spray rapid hardening principle - Google Patents

A kind of complicated ceramic part forming method based on wax spray rapid hardening principle Download PDF

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Publication number
CN106064421A
CN106064421A CN201610371847.XA CN201610371847A CN106064421A CN 106064421 A CN106064421 A CN 106064421A CN 201610371847 A CN201610371847 A CN 201610371847A CN 106064421 A CN106064421 A CN 106064421A
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China
Prior art keywords
wax
ceramic
pattern
wax spray
complicated
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CN201610371847.XA
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Chinese (zh)
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CN106064421B (en
Inventor
吕志刚
胡可辉
魏亚蒙
刘伟
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清华大学
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/26Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/243Setting, e.g. drying, dehydrating or firing ceramic articles

Abstract

A kind of complicated ceramic part forming method based on wax spray rapid hardening principle, belongs to melted module precise casting technology field.First the method generates the three-dimensional entity model of wax-pattern in a computer with 3D sculpting software, then it is divided into, by delamination software, a series of thin layers that thickness is 0.02~2.00mm, obtain the shape of every layer, formation 1~5mm high wax-pattern chamber is successively accumulated by wax spray technology, the ceramic size prepared is filled in die cavity, Vltrasonic device auxiliary slurry levelling is used during filled therewith, repeat to add up and form the ceramic body wrapped up by wax-pattern afterwards, heat treatment is removed wax-pattern and sinters, and ultimately forms ceramic objects.The feature of easily fabricated for rapid shaping technique complex shape part is combined by the method with the high accuracy feature of lost-wax casting, adds that segmentation is injected ceramic size and overcome the defect of tradition grouting process, can solve the complicated ceramic structures of high accuracy and manufacture a difficult problem.Achieve the Non-mould shaping of the complicated ceramic component of high accuracy.

Description

A kind of complicated ceramic part forming method based on wax spray rapid hardening principle

Technical field

The present invention relates to the new technology of a kind of ceramic component molding, be based especially on the complicated pottery zero of wax spray rapid hardening principle The process of part molding, belongs to melted module precise casting technology field.

Background technology

Ceramic material has the features such as high, wear-resistant, corrosion-resistant, the high rigidity of intensity, is one of most important engineering material, In Aero-Space, petrochemical industry, defence and military and the field extensive application such as civilian.Traditional preparation technology is to utilize mould Dusty material being made base substrate, then obtains ceramic component through high temperature sintering, this forming method is limited by Mold Making, Significantly constrain ceramic component become more meticulous complicate development and demand.The 3D printing technique that developed recently gets up makes material molding Achieve the production without modelling.

Wax spray 3D printing technique is a kind of quick shaping process grown up for wax-loss casting process, is former with full wax Material, uses three-dimensional wax spray printing technique, and amorphism limits, and precision is high, builds product surface smooth, it is adaptable to hot investment casting adds Work.

Traditional ceramic material injection forming, injection-compression molding are high to the performance requirement of ceramic size, need to apply outer strip Part, the fine structure for mould inside easily causes the defects such as filling discontented generation cavity.

Summary of the invention

In order to overcome the restriction of complicated ceramic part mould, solve tradition injection forming, the defect of injection-compression molding, the present invention Thering is provided a kind of complicated ceramic part forming method based on wax spray rapid hardening principle, the method combines high accuracy and the 3D of lost-wax casting Printing can realize the feature of part complexity so that it is produces ceramic component complex-shaped, that precision is high, surface quality is good, And wax-pattern parcel base substrate disposal molding.

The technical solution used in the present invention is as follows:

A kind of complicated ceramic part forming method based on wax spray rapid hardening principle, the method is former with paraffin and ceramic size Material, it is characterised in that it comprises the following steps:

1) construct the three-dimensional data model of wax-pattern, and data model is converted into STL formatted file;

2) doing layered shaping by the delamination software of wax spray rapid prototyping system self, thickness is 0.02~2.00mm;

3) set every layer of wax-pattern chamber height, the wax spray number of plies in the most each " wax spray-slip casting " cycle, form the wax-pattern of 1~5mm Chamber;

4) in ceramic powders, add the quick-acting binder of 5%~25%, be configured to ceramic size, ceramic size is injected In wax-pattern chamber;

5) step 3 is repeated)~4), obtain by the ceramic body of parafilm wrap;

6) ceramic body of parafilm wrap is dried, puts into and high temperature furnace is carried out dewax and high temperature sintering process, Obtain ceramic objects.

In technique scheme, described ceramic powders is SiO2、Al2O3、ZrO2And Y2O3In the mixing of one or more, Its granularity is 200 mesh~10000 mesh.

Preferably, step 4) in ceramic size is injected wax-pattern chamber during, use Vltrasonic device auxiliary slurry levelling.

The step 6 of the present invention) in, the dry of described ceramic body includes normal temperature drying, lyophilization, vacuum drying or micro- Ripple is dried;Dewaxing temperature is 400~800 DEG C, and high temperature sintering temperature is 1000~1600 DEG C.

The present invention has the following advantages and the technique effect of salience: the present invention uses wax spray 3D to print and makes pottery with subsection filling Porcelain slurry combines, and has both broken the mould restriction for complicated shape, it is achieved that the precision manufactureing without mould of ceramic material, again may be used Realize the disposable base substrate forming wax-pattern parcel, solve fine structure and be easily generated the problem of cavity defect, shape can be produced Ceramic component complicated, that precision is high, surface quality is good, simplifies the technological process of production, substantially increases production efficiency.

Accompanying drawing explanation

Fig. 1 is the process chart of the present invention.

Fig. 2 is three-dimensional entity model figure and the profile of wax-pattern.

Fig. 3 is the ceramic part illustraton of model that wax-pattern correspondence manufactures.

Fig. 4 (a)-4 (e) is multistep molding schematic diagram.

In figure: 1-wax spray shower nozzle;2-wax mould shell;3-slip casting pressure head;4-ultrasonic wave added leveling device;5-injects wax mould shell Ceramic size.Black part is divided into ceramic size.

The present invention is described in further detail for the example be given below in conjunction with accompanying drawing and inventor.

Detailed description of the invention

The present invention is further described with being embodied as example below in conjunction with the accompanying drawings.

As shown in fig. 1, a kind of based on wax spray rapid hardening principle the complicated ceramic part forming method that the present invention provides, its Specifically include following steps:

First by the three-dimensional data model of Pro/E or Solidworks software construction wax-pattern, data model is as shown in Figure 2 (Fig. 3 is the ceramic part that wax-pattern shown in Fig. 2 is formed).Subsequently model shown in Fig. 2 is stored as STL formatted file.Next step The delamination software using wax spray rapid prototyping system self does layered shaping, sets every layer thickness, namely every section of wax-pattern cavity Highly, thickness is generally 0.02~2.00mm;According to the requirement of Part Surface Roughness, needed for selecting to print monolayer wax-pattern cavity The wax spray number of plies wanted, will process data and import in fabrication schedule.

Subsequently entering the actual preparatory phase of ceramic part, this stage first step adds 5%~25% in ceramic powders Quick-acting binder, be configured to ceramic size, described ceramic powders is SiO2、Al2O3、ZrO2And Y2O3In one or more Mixing, its granularity is 200 mesh~10000 mesh.Quick-acting binder includes rapidly-dried silica sol, silester, waterglass;Second step Being added to spreading system by ceramic size, wherein spreading system is made up of material storing box and shower nozzle;3rd step sets in a computer Put technological parameter, proceed by " wax spray-slip casting " step.Through preparing cere cavity such as Fig. 4 of certain altitude after a while A, shown in (), wax spray program temporarily ceases, now adjuvant systems starts, and in the wax-pattern cavity formed, filling enters ceramic size Form the structure such as Fig. 4 (b) to complete.Owing to cere cavity height is low, the ceramic size total amount that filling enters is little, can be by super Sound auxiliary flow leveling device 4 promotes the homogenization that ceramic size is distributed effectively, is also beneficial to the eliminating of bubble in slurry, is conducive to The raising of the final mass of ceramic part, now completes once " wax spray-slip casting " operation.Again open after filled therewith, levelling Beginning " wax spray-slip casting " operation, prepares shown in wax-pattern cavity such as Fig. 4 (c) of certain altitude on the basis of original wax-pattern again, In this wax-pattern cavity, filling enters ceramic size formation and completes next time " wax spray-slip casting " operation as shown in Fig. 4 (d).So Duplicate printing wax-pattern, the process of filling slurry, finally prepare the ceramic part of wax-pattern parcel.Subsequently enter post processing rank Section, is dried the ceramic body that wax-pattern wraps up, dewaxes, high temperature sintering step, and dewaxing temperature is 400~800 DEG C, and high temperature burns Junction temperature is 1000~1600 DEG C.Finally molded article is carried out removing surface and obtains ceramic component (Fig. 3).

Claims (4)

1. a complicated ceramic part forming method based on wax spray rapid hardening principle, the method is former with paraffin and ceramic size Material, it is characterised in that it comprises the following steps:
1) construct the three-dimensional data model of wax-pattern, and data model is converted into STL formatted file;
2) doing layered shaping by the delamination software of wax spray rapid prototyping system self, thickness is 0.02~2.00mm;
3) preparing every layer of wax-pattern chamber height, the wax spray number of plies in the most each " wax spray-slip casting " cycle, every layer of wax-pattern chamber height is set as 1~5mm;
4) in ceramic powders, add the quick-acting binder of 5%~25%, be configured to ceramic size, ceramic size is injected wax-pattern In chamber, complete once " wax spray-slip casting " operation;
5) on the basis of completing once " wax spray-slip casting " operation, step 3 is repeated)~4), obtain by the ceramic blank of parafilm wrap Body;
6) ceramic body of parafilm wrap is dried, puts into and high temperature furnace is carried out dewax and high temperature sintering process, obtain Ceramic objects.
A kind of complicated ceramic part forming method based on wax spray rapid hardening principle the most according to claim 1, its feature exists In step 4) in ceramic size is injected wax-pattern chamber during, use Vltrasonic device auxiliary slurry levelling.
A kind of complicated pottery based on wax spray rapid hardening principle according to claim 1 the most according to claim 1 and 2 Method for forming parts, it is characterised in that: described step 4) described in ceramic powders be SiO2、Al2O3、ZrO2And Y2O3In one Kind or several mixing, its granularity is 200 mesh~10000 mesh.
A kind of complicated ceramic part forming method based on wax spray rapid hardening principle the most according to claim 1, its feature exists In step 6) described in ceramic body dry include normal temperature drying, lyophilization, vacuum drying or microwave drying;Dewaxing temperature Degree is 400~800 DEG C, and high temperature sintering temperature is 1000~1600 DEG C.
CN201610371847.XA 2016-05-30 2016-05-30 A kind of complicated ceramic part forming method based on wax spray rapid hardening principle CN106064421B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110370423A (en) * 2019-07-30 2019-10-25 华中科技大学 The casting method of ceramic/metal integration part based on layering extrusion molding

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6375880B1 (en) * 1997-09-30 2002-04-23 The Board Of Trustees Of The Leland Stanford Junior University Mold shape deposition manufacturing
CN1686691A (en) * 2005-04-20 2005-10-26 陕西科技大学 Fast shaping method of coramic component port
CN103737934A (en) * 2014-01-22 2014-04-23 黑龙江省科学院自动化研究所 3D (3-Dimensional) printer based on fused-deposition rapid prototyping technology and printing method thereof
CN104526838A (en) * 2014-12-30 2015-04-22 宁波伏尔肯机械密封件制造有限公司 Method for 3D ceramic printing forming
CN105109040A (en) * 2014-12-31 2015-12-02 刘恩辰 Three dimensional structure shaping method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6375880B1 (en) * 1997-09-30 2002-04-23 The Board Of Trustees Of The Leland Stanford Junior University Mold shape deposition manufacturing
CN1686691A (en) * 2005-04-20 2005-10-26 陕西科技大学 Fast shaping method of coramic component port
CN103737934A (en) * 2014-01-22 2014-04-23 黑龙江省科学院自动化研究所 3D (3-Dimensional) printer based on fused-deposition rapid prototyping technology and printing method thereof
CN104526838A (en) * 2014-12-30 2015-04-22 宁波伏尔肯机械密封件制造有限公司 Method for 3D ceramic printing forming
CN105109040A (en) * 2014-12-31 2015-12-02 刘恩辰 Three dimensional structure shaping method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110370423A (en) * 2019-07-30 2019-10-25 华中科技大学 The casting method of ceramic/metal integration part based on layering extrusion molding

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