CN101298746A - Method for manufacturing paper pulp molding vacuum filtration die based on SLS quick forming principle - Google Patents
Method for manufacturing paper pulp molding vacuum filtration die based on SLS quick forming principle Download PDFInfo
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- CN101298746A CN101298746A CNA2008100241680A CN200810024168A CN101298746A CN 101298746 A CN101298746 A CN 101298746A CN A2008100241680 A CNA2008100241680 A CN A2008100241680A CN 200810024168 A CN200810024168 A CN 200810024168A CN 101298746 A CN101298746 A CN 101298746A
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Abstract
The invention relates to a pulp model filtering mould manufacturing method, in particular to a pulp model filtering mould manufacturing method based on the SLS quick-forming theory. The pulp model filtering mould manufacturing method based on the SLS quick-forming theory includes the steps: step 1. the design of filtering vent; step 2. the generation of an STL file; step 3. the processing of STL files: a data processing software named Magics is adopted to process the STL file of pulp model filtering mould to generate a CLI slice file used for quickly forming the pulp model filtering mould; step 4. the conversion of the CLI slice file: the CLI slice file of the pulp model filtering mould is converted to an identifiable file of a quick-forming machine and then the converted file is inputted into the quick-forming machine; step 5. the selection of sintering material, polystyrene powder or nylon powder is selected as sintering material; step 6. the setting of sintering process parameters and manufacturing; step 7. the reinforcement process: resin is painted onto surfaces of prepared prototype parts to reinforce the strength of prepared part to form the filtering mould, so as to enhance the accuracy and efficiency of pulp model filtering mould manufacturing process.
Description
Technical field
The present invention relates to a kind of paper mould suction strainer mould manufacturing method, specifically a kind of paper mould suction strainer mould manufacturing method based on SLS quick shaping principle.
Background technology
RP technique (Rapid Prototyping﹠amp; Manufacturing) originate from Japan the eighties in 20th century, develop into the U.S. and West Europe very soon.This technology is to adopt pointwise or forming method successively, and the parts of one-shot forming complexity or mould are without any need for frock, saved manufacturing expense, shorten the manufacturing cycle, realized three-dimensional manufacturing and visual, helped the information interchange between designer, manufacturer and the user.Can finish experimental study work in the design phase, reduce experimental period and material consumption, thereby can estimate fast product design, revise,, improve Enterprises'Competitiveness, can be rated as manufacturing field human thinking's once leap with the response market demand.RP technique has compiled the advanced achievement in all multiple-projects fields such as computer, laser, CAD, numerical control, physics and chemistry, material, communication network, has solved the many difficult problems in the traditional diamond-making technique, its important breakthrough again that goes out representing manufacturing technology.RP technique has wide application prospect in fields such as Aero-Space, mechano-electronic and health cares, just has been subjected to paying attention to and becoming rapidly widely the research focus in manufacturing field since being born.Along with the continuous expansion of Application Areas, RP technique has become the important component part of advanced manufacturing technology.It has equal meaning with the development of sixties Numeric Control Technology, the eighties special processing technology.
SLS (Selective Laser Sintering) technology is a branch of RP technique.The principle of this technology is that the laser beam that computerizeds control acts on dusty material, and the powder (a few tenths of approximately millimeter) that is scanned the zone produces chemical reaction and bond vitrified, a thin layer of formation part.Workbench moves down the distance of a bed thickness, so that the good product surface of adhesive solidification applies the new dusty material of one deck again, the scanning of following one deck processing so repeatedly, finishes up to whole prototype manufacturing.It is fast that this technology has manufacturing speed, and cost is low, and characteristics such as stock utilization height have been widely used in the production and the manufacturing of every field master mold or functional features at present.With this technological system be applied to the Paper plastic die set manufacturing, also all be in the verification experimental verification stage at home and abroad, also do not have the ripe technological process and the manufacture method of system so far.
The paper mould technology of China develops rapidly from the eighties from external introduction extremely from now on, nowadays progressively replaces the foamed plastics that is difficult to reclaim, be easy to cause white pollution, is used to pack mobile phone, display, notebook computer and other household appliances.On February 13rd, 2003, European Union formally starts shipment at " the waste electronic andelectrical equipment instruction " of electronic product raw material, accessory and packing materials greenization (WEEE) and " about ban use of the harmful substance instruction in electronic electric equipment " (ROHS) two decrees, has accelerated the environmental protection process of global electronic product.And the European environmental protection tax rate of paper products packaging material and foamed plastic packaging material is respectively 0.18Euro/Kg and 0.35Euro/Kg, and both differ about 7.5 times.China is the export processing big country of electronic product, therefore, the paper mould material field of product packaging substitute foamed plastic be imperative, have a extensive future.
Design and manufacturing that paper mould key technology now and production cost are Paper plastic die set.The method that is extensive use of at present digital control processing in the enterprise produces that aluminium alloy is inhaled the slurry mould because the restriction of mold materials and processing mode, causes that the mould design is inaccurate, architectural feature limitation, development cost height, construction cycle be long.Owing to be difficult to make amendment after the machine-shaping, cause occurring problems such as mould development has a big risk, waste of material simultaneously.Therefore, research adopts new die design method and mold production process to reduce production costs, and increases economic efficiency, and becomes the problem that numerous paper enterprise earnestly is concerned about and presses for solution.
The moulding in die cavity of moulded paper pulp product moulding process and rubber and plastic products differs widely, the pulp liquor material that the moulded paper pulp product moulding is adopted is a kind of the aqueous solution that contains 1% left and right sides fiber, must remove most moisture in the forming process, thereby make paper pulp fiber form ground paper attached to forming mould surface.Forming die structure is made up of punch, die, net mould (filter screen) etc., and wherein punch (being the suction strainer mould) and net mould are the keys of paper matrix formation mould.The net mould is to be formed by the silk screen of diameter 0.15mm～0.25mm (metal or plastics) braiding, and the mesh number is generally between 45～60 orders.The net mould depends on convex mould surface by the mode of welding or bonding, and convex mould surface is covered with the ventilative through hole that diameter is 2～4mm.Punch is installed in by the mould seat on the template of make-up machine, forms the back of the body chamber of certain space between punch back and the mould seat, and the another side of template is equipped with air chamber, and air chamber communicates the passage that air chamber wall is provided with two logical compressed air or vacuumizes with back of the body chamber.During vacuum adsorption molding, form the vacuum of 300Pa～650Pa in the air chamber, so paper pulp fiber forms moisture at 70%～75% l Water Paper base attached to net mould surface.The l Water Paper base of pre-profiling is adsorbed on the net mould, and intensity is very low, must rely on after the corresponding with it die matched moulds of another one, makes in the die cavity after the l Water Paper base places matched moulds, utilizes pressure differential to make it to shift, and sends in the drying plant at last and dries.
At present, the manufacturing of paper mould industry suction strainer mould mostly adopts the CNC method for processing to produce aluminum alloy mould, and the construction cycle is long, the development cost height.Because the suction strainer die surface need be covered with ventilative through hole, therefore after Mould Machining is come out, also to adopt the mode of artificial punching to drill through ventilative through hole, waste time and energy.
Summary of the invention
The objective of the invention is to design a kind of paper mould suction strainer mould manufacturing method, to improve the accuracy of manufacture and the efficient of paper mould suction strainer mould based on SLS quick shaping principle.
Based on the paper mould suction strainer mould manufacturing method of SLS quick shaping principle, it is characterized in that this method comprises the steps:
The design of step 1, suction strainer pore: utilize three-dimensional software Pro/E to design several suction strainer pores at the CAD mathematical model die surface of the paper suction strainer mould that has designed;
The generation of step 2, stl file: with three-dimensional software Pro/E the cad file of paper suction strainer mould is converted into the stl file of paper suction strainer mould again, is used for the rapid shaping manufacturing;
The processing of step 3, stl file: utilize data processing software Magics that the stl file of paper suction strainer mould is handled, generate the CLI layer section file of the paper suction strainer mould that is used for the rapid shaping manufacturing, contents processing comprises:
File-repair functions in a, the application Magics software is repaired the mistake in the stl file of paper suction strainer mould;
B, the border volume that the stl file of paper suction strainer mould is set support, and prevent the sintered part distortion;
C, application data process software Magics compensate setting to the Z direction radius of relevant suction strainer pore in the stl file of paper suction strainer mould, to improve the Forming Quality of suction strainer pore;
The conversion of step 4, CLI layer section file: the CLI layer section file of paper suction strainer mould is changed into the discernible file of rapidform machine, import rapidform machine again;
The selection of step 5, agglomerated material: select polystyrene powder or nylon powder as agglomerated material; Polystyrene powder hydroscopicity is little, and shrinkage factor is also little, and the back that is heated is fusible, bonding, and cooling back curing molding can be used as prototype or functor and uses behind the sintering; Nylon material mechanical performance excellence, TENSILE STRENGTH, toughness, anti-repeated stock vibration, anti-wear performance are all very outstanding.But because price is than polystyrene powder costliness, and the difficult control of sintering process, at present domesticly do not form the wide range of commercial use;
Step 6, setting sintering process parameter are also made: selected agglomerated material is added in the forming cavity of rapidform machine, start rapidform machine, according to the CLI layer section file after transforming, finish manufacture process by rapidform machine automatically, sintering goes out the prototype of paper suction strainer mould; Before starting rapidform machine, earlier rapidform machine is set as follows sintering process parameter:
Laser power (w) 10～20
Sweep speed (mm/s) 1500～3000
Sintering temperature (℃) 70～110 ℃
Sweep span (mm) 0.1～0.3
Bed thickness (mm) 0.1～0.25
Scan mode X-axis and Y direction hocket;
Step 7, enhancement process:,, form the suction strainer mould to strengthen product intensity at the prototype surface applied resin of preparation.
Through after the enhancement process, carry out the covering of net mould again: utilize welding, bonding or bind method surface coverage net mould at the suction strainer mould.
Advantage of the present invention is: use the SLS RP technique, directly preparation has the paper mould suction strainer mould of plastics of ventilative through hole.By strengthening the postprocessing working procedures of intensity, make mould of plastics can substitute conventional aluminum alloy suction strainer mould fully and carry out the production of paper matrix.This kind production technology only needs the man-hour of traditional diamond-making technique 30～50% and 20～35% cost, has shortened construction cycle and development cost greatly, has reduced production process, has improved production efficiency.
The SLS laser sintering rapid prototyping technology is applied to the manufacturing of master mold more, is applied to make paper mould suction strainer mould (functional mould), still belongs to the first time in the paper industry.Because paper mould suction strainer mould is porous, shaped, when using the SLS laser sintering rapid prototyping technology paper mould suction strainer mould is made and to make the desired technological parameter of other moulds also inequality.
Description of drawings
Fig. 1 is the three-dimensional model diagram of angle pad.
Fig. 2 temperature control curve figure.X-axis is the number of plies, and Y-axis is a temperature.
The specific embodiment
The design of step 1, suction strainer pore: in three-dimensional software Pro/E, use " array " order and directly design several suction strainer pores at the CAD mathematical model die surface of the paper suction strainer mould that has designed; This kind method has changed the technology that traditional suction strainer pore manually drills through, and reaches the disposable design of suction strainer pore, has improved the design accuracy and the efficient of suction strainer pore.
Because paper products is manufactured, at the suction strainer die surface of paper, it is a lot of apertures of 3～5mm that diameter need be set, as shown in Figure 1.It mainly acts on is that vacuum suction filter process when producing for paper matrix provides ventilative through hole, and paper pulp is being adsorbed under the effect of air pressure suction on the apron that is attached to die surface, forms paper matrix.The air-vent of conventional aluminum alloy mold is artificial boring, because the mould structure complexity, drilling operating often expends a large amount of time and cost, and the air-vent difficult quality guarantee influences paper matrix filtering molding effect simultaneously.
The generation of step 2, stl file: with three-dimensional software Pro/E the cad file of paper suction strainer mould is converted into the stl file of paper suction strainer mould, is used for the rapid shaping manufacturing;
The processing of step 3, stl file: utilize data processing software Magics that the stl file of paper suction strainer mould is handled, generate the CLI layer section file of the paper suction strainer mould that is used for the rapid shaping manufacturing, contents processing comprises:
File-repair functions in a, the application Magics software is repaired the mistake in the stl file of paper suction strainer mould;
B, the border volume that the stl file of paper suction strainer mould is set support, and prevent the sintered part distortion;
C, application data process software Magics compensate setting to the Z direction radius of relevant suction strainer pore in the stl file of paper suction strainer mould.The moulding process that successively adds up based on the SLS sintering process and the characteristics of paper suction strainer mould porous when treatment S TL file, need be provided with radius compensation to the Z direction, avoid the machining hole distortion, improve Forming Quality; The processing of stl file is improved the precision of suction strainer mould file, helped follow-up rapid shaping manufacturing;
The conversion of step 4, CLI layer section file: the CLI layer section file of paper suction strainer mould is changed into the discernible file of rapidform machine, import rapidform machine again;
The selection of step 5, agglomerated material: select polystyrene powder or nylon powder as agglomerated material; Polystyrene powder hydroscopicity is little, and shrinkage factor is also little, and the back that is heated is fusible, bonding, and cooling back curing molding can be used as prototype or functor and uses behind the sintering; Nylon material mechanical performance excellence, TENSILE STRENGTH, toughness, anti-repeated stock vibration, anti-wear performance are all very outstanding.But because price is than polystyrene powder costliness, and the difficult control of sintering process, at present domesticly do not form the wide range of commercial use;
Step 6, setting sintering process parameter are also made: selected agglomerated material is added in the forming cavity of rapidform machine, start rapidform machine, according to the CLI layer section file after transforming, finish manufacture process by rapidform machine automatically, sintering goes out the prototype of paper suction strainer mould; Owing to paper suction strainer mould porous, conveniently improve and make efficient for the ease of clear powder behind mould molding, also inequality when required technological parameter is controlled with other parts of manufacturing during sintering.By a large amount of experiments, determined that a cover is suitable for making the technological parameter proportioning of paper mould suction strainer mould, both guaranteed the precision and the intensity of mould, improved make efficiency again.The sintering process parameter of rapidform machine is as follows:
Laser power (w): 10～20
Sweep speed (mm/s) 1500～3000
70～110 ℃ of sintering temperatures
Sweep span (mm) 0.1～0.3
Bed thickness (mm) 0.1～0.25
Scan mode X-axis and Y direction hocket;
During moulding, spread one deck polystyrene dusty material earlier in the forming cavity of rapidform machine, the laser beam emitting device controlled motion is implemented scanning successively in the forming cavity of having spread the polystyrene dusty material.Laser focal beam spot scanning place of arrival, polystyrene powder sintering forms the part of physical model, until forming complete physical model.It is taken out from the forming cavity of polystyrene dusty material and remove unnecessary powder promptly get prototype.The utilization rate height of SLS process materials, the adaptation of material is wide, can not only make the high-strength plastic materials and parts, can also make the part of materials such as pottery, paraffin, uses very extensive at present.
Step 7, enhancement process:,, form the suction strainer mould to strengthen product intensity at the prototype surface applied resin of preparation;
The surface roughness and the strength ratio of SLS workpiece itself are lower.Therefore, after SLS is shaped, still need further to handle the performance that improves workpiece.Existing technology has three kinds: first kind is that workpiece is carried out surface treatment, with the intensity that improves its roughness grade and suitably improve workpiece.This treatment process is mainly used in visual workpiece.Second kind is to handle with resin, improves its intensity.This treatment process is mainly used in the workpiece of function part, and what the present invention adopted is this technology.The third is to carry out waxdip to handle, and improves the intensity and the roughness grade of workpiece.This workpiece of handling through waxdip can be used as wax-pattern and is directly used in hot investment casting.
Through after the enhancement process, carry out the covering of net mould again: utilize welding, bonding or bind method surface coverage net mould at the suction strainer mould.
The production of step 8, paper matrix: the suction strainer mould can directly carry out the production of paper matrix after making.
Be example with corrugated board corner protector suction strainer mould below, describe the manufacturing process of a reality:
Experiment material: polystyrene powder (PSB).
The experiment exemplar: corrugated board corner protector suction strainer mould, see Fig. 1.Technological parameter sees Table 1.
Table 1. technological parameter is provided with table
Wherein, temperature control curve 1 as shown in Figure 2: to the 70th layer of test specimen, temperature rises to 115 ℃ from 100 ℃ from the shop powder, and from the 70th layer to the 499th layer (last one deck), temperature is reduced to 108 ℃ gradually by 115 ℃, and in the insulating process, temperature is reduced to 100 ℃ gradually.
Processing and attached net after the formation prototype:
The surface roughness and the strength ratio of SLS workpiece itself are lower.Therefore, after SLS is shaped, still need further to handle the performance that improves workpiece.In order to improve the bending resistance compression strength of product as much as possible, obtain being fit to be directly used in the functional paper suction strainer mould that paper matrix is produced, adopt the aftertreatment technology of application of resin.
After solidifying post processing, the performance of exemplar test comprises contraction, density, compression strength.
Test result and analysis:
Experimental data by table 2 as can be seen, the shrinkage factor of mould and compression strength satisfy the paper pulp moulding technology production requirement fully.During 2 hours hardening times, it is maximum that the density of mould and intensity reach, near entity density.
The testing experiment result is shunk in the post processing of table 2 epoxy resin
Table 3 epoxy resin post processing strength character testing experiment result
The net mould of conventional aluminum alloy mold often is welded on the suction strainer mould by the mode of spot welding.Because the mould of plastics that the SLS sintering goes out does not possess conducting function, so the mode that can adopt bonding or fix with the thin wire binding.In the process of attached net, can be according to the features of shape of mould, burst bonding or nerve of a covering mould.
Claims (2)
1,, it is characterized in that this method comprises the steps: based on the paper mould suction strainer mould manufacturing method of SLS quick shaping principle
The design of step 1, suction strainer pore: utilize three-dimensional software Pro/E to design several suction strainer pores at the CAD mathematical model die surface of the paper suction strainer mould that has designed;
The generation of step 2, stl file: with three-dimensional software Pro/E the cad file of paper suction strainer mould is converted into the stl file of paper suction strainer mould again, is used for the rapid shaping manufacturing;
The processing of step 3, stl file: utilize data processing software Magics that the stl file of paper suction strainer mould is handled, generate the CLI layer section file of the paper suction strainer mould that is used for the rapid shaping manufacturing, contents processing comprises:
File-repair functions in a, the application Magics software is repaired the mistake in the stl file of paper suction strainer mould;
B, the border volume that the stl file of paper suction strainer mould is set support, and prevent the sintered part distortion;
C, application data process software Magics compensate setting to the Z direction radius of relevant suction strainer pore in the stl file of paper suction strainer mould, to improve the Forming Quality of suction strainer pore;
The conversion of step 4, CLI layer section file: the CLI layer section file of paper suction strainer mould is changed into the discernible file of rapidform machine, import rapidform machine again;
The selection of step 5, agglomerated material: select polystyrene powder or nylon powder as agglomerated material;
Step 6, setting sintering process parameter are also made: selected agglomerated material is added in the forming cavity of rapidform machine, start rapidform machine, according to the CLI layer section file after transforming, finish manufacture process by rapidform machine automatically, sintering goes out the prototype of paper suction strainer mould; Before starting rapidform machine, earlier rapidform machine is set as follows sintering process parameter:
Laser power (w) 10～20
Sweep speed (mm/s) 1500～3000
Sintering temperature (℃) 70～110 ℃
Sweep span (mm) 0.1～0.3
Bed thickness (mm) 0.1～0.25
Scan mode X-axis and Y direction hocket;
Step 7, enhancement process:,, form the suction strainer mould to strengthen product intensity at the prototype surface applied resin of preparation.
2, according to claim 1 based on the paper mould suction strainer mould manufacturing method of SLS quick shaping principle, it is characterized in that: through after the enhancement process, carry out the covering of net mould again: utilize welding, bonding or bind method surface coverage net mould at the suction strainer mould.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885248A (en) * | 2010-07-27 | 2010-11-17 | 冠捷显示科技（厦门）有限公司 | A kind of paper mould production method |
| CN104227230A (en) * | 2014-07-24 | 2014-12-24 | 中国工程物理研究院机械制造工艺研究所 | Rapid laser manufacturing method for micropore foamy copper |
| CN104493163A (en) * | 2014-12-30 | 2015-04-08 | 无锡银邦精密制造科技有限公司 | 3D (Three-Dimensional) printing processing method capable of facilitating power clearing treatment for injection mold overall mold core |
| CN106064478A (en) * | 2016-06-29 | 2016-11-02 | 白嘉远 | A kind of selective laser sintering manufacturing process of hollow out bone injury protector |
| CN108999289A (en) * | 2018-07-19 | 2018-12-14 | 江苏东南结构防灾工程有限公司 | The raw shape concrete slab shell manufacturing process of number |
| CN112238209A (en) * | 2020-10-16 | 2021-01-19 | 向孙团 | Manufacturing method of pulp molding stainless steel forming die |
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2008
- 2008-05-19 CN CNA2008100241680A patent/CN101298746A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885248A (en) * | 2010-07-27 | 2010-11-17 | 冠捷显示科技（厦门）有限公司 | A kind of paper mould production method |
| CN104227230A (en) * | 2014-07-24 | 2014-12-24 | 中国工程物理研究院机械制造工艺研究所 | Rapid laser manufacturing method for micropore foamy copper |
| CN104227230B (en) * | 2014-07-24 | 2017-02-01 | 中国工程物理研究院机械制造工艺研究所 | Rapid laser manufacturing method for micropore foamy copper |
| CN104493163A (en) * | 2014-12-30 | 2015-04-08 | 无锡银邦精密制造科技有限公司 | 3D (Three-Dimensional) printing processing method capable of facilitating power clearing treatment for injection mold overall mold core |
| CN106064478A (en) * | 2016-06-29 | 2016-11-02 | 白嘉远 | A kind of selective laser sintering manufacturing process of hollow out bone injury protector |
| CN108999289A (en) * | 2018-07-19 | 2018-12-14 | 江苏东南结构防灾工程有限公司 | The raw shape concrete slab shell manufacturing process of number |
| CN112238209A (en) * | 2020-10-16 | 2021-01-19 | 向孙团 | Manufacturing method of pulp molding stainless steel forming die |
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