CN102922633A - Prototyping silastic mould and manufacture method thereof - Google Patents
Prototyping silastic mould and manufacture method thereof Download PDFInfo
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- CN102922633A CN102922633A CN2012104404522A CN201210440452A CN102922633A CN 102922633 A CN102922633 A CN 102922633A CN 2012104404522 A CN2012104404522 A CN 2012104404522A CN 201210440452 A CN201210440452 A CN 201210440452A CN 102922633 A CN102922633 A CN 102922633A
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Abstract
The invention discloses a prototyping silastic mould and a manufacture method thereof. The manufacture method comprises the following steps of selecting at least one cross section which is axially perpendicular to a variable cross-section through hole of a prototype part and intersected with the variable cross-section through hole as a partition section, dividing the prototype part at the position of the partition section, selecting two opposite end faces of two divided portions as parting surfaces, sticking and fixing a transparent adhesive tape on one of the parting surfaces and fixing and combining divided prototype parts together, wherein the cross section is provided with at least one minimum cross section which is intersected with the variable cross-section through hole and provided with the hole diameter identical to the minimum hole diameter of the cross-section through hole, and the two divided portions obtained by dividing the prototype part with the partition section as the division surface. A thin-neck coronary portion does not produced at the position of an internal parting surface of the silastic mould manufactured by means of the manufacture method, so that the problem of forced demoulding is solved when the demoulding is performed at the position of the variable cross-section through hole, and the copying quality and the service life of the silastic mould are guaranteed.
Description
Technical field
The invention belongs to the Mould Machining field shaping technique, be specifically related to a kind of manufacture method of prototyping silica gel mould, also relate to simultaneously a kind of prototyping silica gel mould that uses above-mentioned manufacture method to make.
Background technology
Silica gel mould is mainly used in the fast Development of new product, especially the quick manufacturing of small lot multi-assortment production.Rapid tooling based on the rapid prototyping manufacturing is different from the metal die that conventional mechanical is processed, and usually take the bi-component high molecular synthetic material as pattern-making material (such as silica gel, resin etc.) can make soft mold fast and accurately.
To such as Fig. 1, automobile electric connector plug as prototype parts shown in Figure 2 carry out rapid die-manufacturing the time, need to carry out structural analysis to part, determine patrix 1 as shown in Figure 3, counterdie 5, inner die joint 4, outside die joint 6, cast gate 2, the positions such as rising head 3, this electric connector plug connector comprises the plug connector housing, this plug connector housing comprises at the bottom of the shell 101 and shell wall 102 all around, 101 have towards the described inner bottom surface of shell wall all around at the bottom of this shell, 101 are provided with five undersized variable cross-section through holes 100 at the bottom of the shell of plug connector housing, this variable cross-section through hole 100 is comprised of the up big and down small bellmouth section on top and the straight hole section of bottom, the lower surface of the straight hole section of variable cross-section through hole overlaps with inner bottom surface at the bottom of the described shell, 101 inner bottom surface convexes with reinforcement plate 200 at the bottom of shell in the plug connector housing, the degree of depth of described variable cross-section through hole 100 is larger than very with diameter, and structure is the typical case relatively.During molding, need in advance according to the physical dimension of prototype parts 7 make one wooden framed 8, pre-configured satisfactory silicon rubber carries out degassed processing to silicon rubber.In addition, when concrete molding, for guaranteeing to divide normally mould, the face of choosing in advance on prototype parts 7 is pasted adhesive tape, this adhesive tape is blocked the through hole on the original shape part, when dividing mould, separates mould according to the position of choosing in advance with blade and obtains outside die joint 6, and the adhesive tape present position is the inside die joint 4 of silica gel mould, and upper and lower mould is separated from outside die joint and inner die joint.During concrete molding, with the prototype parts that is pasted with in advance adhesive tape be fixed on prefabricated framed in, with the silicon rubber that configures be poured into framed in, after silica gel solidifies, from outside die joint and inner die joint silica gel mould is divided into upper die and lower die, when dividing mould, cut open silica gel from the outside die joint of reserving with blade, described inner die joint is then formed in silica gel mould inside by the adhesive tape that is pasted with of prototype parts.Behind minute mould, prototype parts is taken out, can obtain the silica gel mould of prototype parts, this silica gel mould can be used as the low-volume copying part and uses.
For steel die, the number of times of use can reach 2-10 ten thousand times.Manufacturing process is complicated, and is expensive, and the die joint of mould is chosen optimal case through repeatedly optimizing.And silica gel mould can be owing to structural reason, the die joint of choosing often is not optimum face, take variable cross-section through-hole structure 11 shown in Figure 4 as example, for this variable cross-section through-hole structure, the plane A of the miner diameter end of variable cross-section through hole and plane B are the desirable die joints of part, but because the sectional area of plane A and plane B is too little, and the hole at plane A place is darker, inconvenient operation is inconvenient to paste adhesive tape, therefore can only choose the larger C face of sectional area and paste adhesive tape.After the C face is pasted adhesive tape, make in the silica gel mould that obtains as shown in Figure 5 like this, patrix 12 divides mould from C face and counterdie, can have more on the counterdie 13 like this and the crown part 131 of the thin neck of the corresponding moulding of variable cross-section through hole, carefully the crown part in footpath is on counterdie, certainly, when dividing mould, by means of the high resiliency of silicon rubber, can utilize the distortion of the crown part of this thin neck from the variable cross-section through hole of prototype parts, to extrude and forced demoulding, prototype parts 11 and counterdie 13 are separated by force.But when using this silica gel mould to make product, each demoulding all needs the crown part 131 of thin neck is extruded the in advance wearing and tearing that once cause counterdie 13, affects the mould service precision, reduces the mold use life-span.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method of prototyping silica gel mould, have the technical problem of the crown part of being answered with the reducing hole of prototype parts to solve the silica gel mould of making in the prior art; Simultaneously, the present invention also provides a kind of prototyping silica gel mould that uses above-mentioned manufacture method to make.
For achieving the above object, the technical scheme of the manufacture method of prototyping silica gel mould provided by the present invention is: the manufacture method of prototyping silica gel mould, this manufacture method comprise the steps,
(1), at least it is axially vertical to choose the variable cross-section through hole with prototype parts, and the cross section of intersecting with the variable cross-section through hole is split surface, at least has the smallest cross-sectional that a cross-sectional aperture that intersects with described variable cross-section through hole equals variable cross-section through hole minimum-value aperture in the selected cross section, prototype parts is carried out subdivision at described split surface place, choose two opposing end surfaces of the two subdivision sections that obtain take split surface as the interface subdivision on the prototype parts as die joint, adhesive tape is pasted and fixed on one of them die joint, and with the prototype parts fixed combination behind the subdivision together;
(2), fixed combination prototype parts together is fixed on prefabricated framed in;
(3), to framed middle cast silicon rubber;
(4), after silicon rubber solidifies, divide mould to obtain Split mold from reaching the outside die joint of presetting with the described inside die joint that is pasted with corresponding coincidences of die joint of adhesive tape silica gel mould.
The variable cross-section through hole of the prototype parts in the described step 1 is comprised of the up big and down small bellmouth section on top and the straight hole section of bottom, and described smallest cross-sectional overlaps with the lower surface of the straight hole section of the variable cross-section through hole of prototype parts.
Prototype parts in the described step 1 is the electric connector plug connector, this electric connector plug connector comprises the plug connector housing, this electric connector housing has at the bottom of the shell and shell wall all around, have at the bottom of this shell towards the described inner bottom surface of shell wall all around, variable cross-section through hole on the described prototype parts is arranged at the bottom of the described shell, the lower surface of the straight hole section of described variable cross-section through hole overlaps with inner bottom surface at the bottom of the described shell, inner bottom surface in housing in the plug connector housing convexes with the reinforcement plate, the split surface corresponding with described smallest cross-sectional will be strengthened gusset and plug connector housing subdivision is opened in reinforcement buttress section in the described step 1, adhesive tape is pasted and fixed on the inner bottom surface as die joint at the bottom of the connector housing, and shell wall around the reinforcement gusset behind the subdivision and the plug connector housing is adhesively fixed together.
The large 50mm of size corresponding to size difference that framed length and width in the described step 2 are high.
The technical scheme of the prepared prototyping silica gel mould of the above-mentioned manufacture method of employing provided by the present invention is: the prototyping silica gel mould, has the variable cross-section mandrel with the corresponding moulding of variable cross-section through hole of corresponding prototype parts on this silica gel mould, have the inside die joint corresponding with the die joint on the prototype parts on the described silica gel mould, inside die joint on the described silica gel mould all variable cross-section mandrel with silica gel mould is axially vertical, and intersect with the variable cross-section mandrel, have at least the minimum inner die joint that a cross section diameter of axle that intersects with described variable cross-section mandrel equals the minimum diameter of axle of variable cross-section mandrel in the described inner die joint.
The variable cross-section mandrel of described silica gel mould is comprised of the up big and down small conical section on top and the straight section of bottom, and the inner die joint of described minimum overlaps with the lower surface of the straight section of variable cross-section mandrel.
The invention has the beneficial effects as follows: first prototype parts is carried out subdivision at the split surface place in the manufacture method of silica gel mould provided by the present invention, and the die joint that obtains behind subdivision is pasted adhesive tape, because have the smallest cross-sectional that the cross-sectional aperture that intersects with described variable cross-section through hole equals variable cross-section through hole minimum-value aperture in the selected cross section as split surface, at this smallest cross-sectional place prototype parts is carried out subdivision, separate with the Split mold of silica gel mould at the inside die joint place corresponding with this smallest cross-sectional with all or part of of the variable cross-section mandrel of the silica gel mould of the corresponding moulding of variable cross-section through hole like this, so just can not form the crown part in thin footpath that affects the demoulding at Split mold, can not produce the problem of forced demoulding, thereby guarantee reproduction quality and the service life of silica gel mould.
At least have a cross section diameter of axle that intersects with described variable cross-section mandrel in the inside die joint of silica gel mould provided by the present invention and equal the minimum inner die joint of the minimum diameter of axle of variable cross-section mandrel, the inner die joint of this minimum is separating with this place all or part of of variable cross-section mandrel with the Split mold of silica gel mould, so just can not form the crown part in thin footpath that affects the demoulding at Split mold, can not produce the problem of forced demoulding, thereby guarantee reproduction quality and the service life of silica gel mould.
Description of drawings
Fig. 1 is existing a kind of structural representation with electric connector plug connector of variable cross-section through hole;
Fig. 2 is the cutaway view of Fig. 1;
Fig. 3 uses electric connector plug connector shown in Figure 1 as the structural representation of the silica gel mould of prototype parts made;
Fig. 4 is the structural representation of variable cross-section throughhole portions among Fig. 2;
Fig. 5 is the decomposition texture schematic diagram of the silica gel mould corresponding with prototype parts shown in Figure 4;
Fig. 6 is the decomposition texture schematic diagram that the manufacture method of silica gel mould provided by the present invention is done prepared silica gel mould;
Fig. 7 is the structural representation when the upper and lower mould of silica gel mould snaps together among Fig. 6.
The specific embodiment
A kind of embodiment of manufacture method of prototyping silica gel mould, the manufacture method of the silica gel mould among this embodiment comprises the steps:
(1), choose one with the variable cross-section through hole of prototype parts axially vertical and with the crossing cross section of variable cross-section through hole be split surface, this cross section equals the smallest cross-sectional of variable cross-section through hole minimum-value aperture for the cross-sectional aperture that intersects with described variable cross-section through hole, prototype parts is carried out subdivision at described split surface place, choose two-part two opposing end surfaces of obtaining take split surface as the interface subdivision on the prototype parts as die joint, adhesive tape is pasted and fixed on one of them die joint, and the prototype parts behind the subdivision is retightened combine;
(2), the prototype parts of fixed combination prototype parts together is fixed on prefabricated framed in;
(3), to framed middle cast silicon rubber;
(4), after silicon rubber solidifies, divide mould to obtain Split mold from reaching the outside die joint of presetting with the described inside die joint that is pasted with corresponding coincidences of die joint of adhesive tape silica gel mould.
The variable cross-section through hole of the prototype parts in the described step 1 is comprised of the up big and down small bellmouth section on top and the straight hole section of bottom, and described smallest cross-sectional overlaps with the lower surface of the straight hole section in the variable cross-section hole of prototype parts.
The high size of framed length and width in the described step 2 is the size large 50mm higher than the length and width of prototype parts respectively.The high undersized result of use that can affect silicon rubber of framed length and width also is unfavorable for the normal cast of silicon rubber herein.And oversize, both caused the waste of silica gel also can reduce the flexibility of silica gel, increase the difficulty of from silicon rubber, taking out product.
For such as Fig. 1, automobile electric connector plug as prototype parts shown in Figure 2, the root of strengthening gusset 200 is positioned at the inner bottom surface place that lower surface 101 and the straight hole section variable cross-section through hole overlaps at the bottom of the shell just, smallest cross-sectional at the bottom of the shell in the corresponding above-mentioned steps one of 101 inner bottom surface, like this, as shown in Figure 6, electric connector plug connector inner bottom surface of 101 at the bottom of the shell is carried out subdivision, strengthening gusset 200 and plug connector housing 21 subdivisions opens, like this when making silica gel mould for this electric connector plug connector, inner bottom surface at the bottom of the shell is as die joint E, adhesive tape is sticked on the inner bottom surface of the convenient operation at the bottom of the shell, then will strengthen gusset be adhesively fixed on plug connector housing 21 around on the shell wall, plug connector housing 21 is in the same place with reinforcement gusset 200 fixed combination like this, put it into framed in, to framed middle Implanted Silicon rubber, after silicon rubber solidifies, die joint and the outside die joint place that presets divide mould to obtain respectively patrix 22 and counterdie 23 internally silica gel mould, the corresponding coincidence with the inner bottom surface that is pasted with adhesive tape of this inside die joint.Only will strengthen gusset 200 herein opens with plug connector housing 21 subdivisions, and plug connector housing 21 is not carried out subdivision, and then the shell wall all around that will strengthen gusset 200 and plug connector housing 21 is adhesively fixed, the inner bottom surface of being convenient at the bottom of the die joint behind the subdivision is shell is so on the one hand pasted adhesive tape, avoid occurring affecting the crown part of thin neck of the demoulding, on the other hand, also be convenient to reinforcement gusset 200 is retightened on plug connector housing 21, be convenient to guarantee the precision of prototype parts, improve the precision of the silica gel mould of making.Patrix shown in Figure 6 22 and counterdie 23 be fastened just can obtain as shown in Figure 7 silica gel mould together, and the upper and lower mould of this silica gel mould can form the die cavity corresponding with the prototype parts profile 30.In the die cavity 30 of silica gel mould, pour into a mould silica gel during use, can make needed plug connector.
In the above-described embodiments, because the lower surface of the straight hole section in the variable cross-section hole in prototype parts inner bottom surface lucky and at the bottom of the shell overlaps, can directly carry out subdivision at the root of strengthening gusset like this, in other embodiments, also can choose other axis with variable cross-section through hole cross section vertical and that intersect with the variable cross-section hole as split surface, as long as the cross-sectional aperture of this split surface and variable cross-section through hole equals the minimum-value aperture of variable cross-section through hole, the crown part in thin footpath of the demoulding appears affecting in the time of can avoiding pouring into a mould.
The degree of depth of the variable cross-section through hole in above-described embodiment is little, and in other embodiments, if run into the degree of depth of variable cross-section through hole when larger, prepared variable cross-section mandrel is softer behind subdivision, and rigidity is inadequate.During actual molding, can multiselect to get several variable cross-section through holes with prototype parts axially vertical, and the cross section of intersecting with the variable cross-section through hole is split surface, as long as have at least the smallest cross-sectional that the crossing cross-sectional aperture of a described variable cross-section through hole equals variable cross-section through hole minimum-value aperture in these cross sections, after the variable cross-section through hole to prototype parts carries out the multistage subdivision, corresponding with the variable cross-section through hole like this variable cross-section mandrel just can sectional forming, on the one hand be convenient to carry out the demoulding according to the concrete size of variable cross-section through hole, also can improve on the other hand the rigidity of the variable cross-section mandrel after the moulding.
Variable cross-section through hole in above-described embodiment is comprised of the up big and down small bellmouth section on top and the straight hole section of bottom, in other embodiments, during the prototype parts of corresponding difformity size, the variable cross-section through hole can be up big and down small bellmouth, at this moment, described smallest cross-sectional overlaps with the lower surface of the miner diameter end of bellmouth.
As shown in Figure 7, use the embodiment of the prepared prototyping silica gel mould of said method, silica gel mould among this embodiment comprises patrix 22 and the counterdie 23 of corresponding fastening, on, counterdie fastens and forms the die cavity 30 corresponding with the prototype parts profile, convex with the variable cross-section mandrel with the corresponding moulding of variable cross-section through hole of corresponding prototype parts in the bottom of patrix, have the inside die joint corresponding with the die joint on the prototype parts at silica gel mould, die joint on this silica gel mould all variable cross-section mandrel with silica gel mould is axially vertical, and intersect with the variable cross-section mandrel, described inner die joint for the sectional axis that intersects with described variable cross-section mandrel through equaling the minimum inner die joint of the minimum diameter of axle of variable cross-section mandrel, this variable cross-section mandrel is comprised of the up big and down small conical section on top and the straight section of bottom, and minimum inner die joint overlaps with the lower surface of the straight section of non-uniform shaft.
Pouring into a mould silica gel during use in the die cavity 30 of silica gel mould, after silica gel solidified, die joint and outside die joint place separately can make needed plug connector internally with upper die and lower die.
Only be provided with an inner die joint on the silica gel mould in above-described embodiment, in other embodiments, can at silica gel mould a plurality of inner die joints be set as required, as long as have at least an inner die joint of described minimum in these inner die joints.
The variable cross-section through hole of concrete prototype parts is corresponding among the mandrel of the variable cross-section mandrel in above-described embodiment and Fig. 6, in other embodiments, the variable cross-section mandrel of silica gel mould also can be other structures, such as the up big and down small pyramidal structure corresponding with big up and small down bellmouth.
Claims (7)
1. the manufacture method of prototyping silica gel mould is characterized in that: this manufacture method comprises the steps,
(1), at least it is axially vertical to choose the variable cross-section through hole with prototype parts, and the cross section of intersecting with the variable cross-section through hole is split surface, at least has the smallest cross-sectional that a cross-sectional aperture that intersects with described variable cross-section through hole equals variable cross-section through hole minimum-value aperture in the selected cross section, prototype parts is carried out subdivision at described split surface place, choose two opposing end surfaces of the two subdivision sections that obtain take split surface as the interface subdivision on the prototype parts as die joint, adhesive tape is pasted and fixed on one of them die joint, and with the prototype parts fixed combination behind the subdivision together;
(2), fixed combination prototype parts together is fixed on prefabricated framed in;
(3), to framed middle cast silicon rubber;
(4), after silicon rubber solidifies, divide mould to obtain Split mold from reaching the outside die joint of presetting with the described inside die joint that is pasted with corresponding coincidences of die joint of adhesive tape silica gel mould.
2. the manufacture method of prototyping silica gel mould according to claim 1, it is characterized in that: the variable cross-section through hole of the prototype parts in the described step 1 is comprised of the up big and down small bellmouth section on top and the straight hole section of bottom, and described smallest cross-sectional overlaps with the lower surface of the straight hole section of the variable cross-section through hole of prototype parts.
3. the manufacture method of prototyping silica gel mould according to claim 2, it is characterized in that: the prototype parts in the described step 1 is the electric connector plug connector, this electric connector plug connector comprises the plug connector housing, this electric connector housing has at the bottom of the shell and shell wall all around, have at the bottom of this shell towards the described inner bottom surface of shell wall all around, variable cross-section through hole on the described prototype parts is arranged at the bottom of the described shell, the lower surface of the straight hole section of described variable cross-section through hole overlaps with inner bottom surface at the bottom of the described shell, inner bottom surface in housing in the plug connector housing convexes with the reinforcement plate, the split surface corresponding with described smallest cross-sectional will be strengthened gusset and plug connector housing subdivision is opened in reinforcement buttress section in the described step 1, adhesive tape is pasted and fixed on the inner bottom surface as die joint at the bottom of the connector housing, and shell wall around the reinforcement gusset behind the subdivision and the plug connector housing is adhesively fixed together.
4. the manufacture method of prototyping silica gel mould according to claim 1, it is characterized in that: the variable cross-section through hole on the prototype parts in the described step 1 is up big and down small bellmouth, described smallest cross-sectional overlaps with the lower surface of the miner diameter end of bellmouth.
5. it is characterized in that according to claim 1 and 2 or the manufacture method of 3 or 4 described prototyping silica gel moulds: the high size of the framed length and width in the described step 2 is corresponding higher than the length and width of the prototype parts large 50mm of size respectively.
6. the prototyping silica gel mould that uses manufacture method as claimed in claim 1 to make, has the variable cross-section mandrel with the corresponding moulding of variable cross-section through hole of corresponding prototype parts on this silica gel mould, have the inside die joint corresponding with the die joint on the prototype parts on the described silica gel mould, inside die joint on the described silica gel mould all variable cross-section mandrel with silica gel mould is axially vertical, and intersect with the variable cross-section mandrel, it is characterized in that: have at least the minimum inner die joint that a cross section diameter of axle that intersects with described variable cross-section mandrel equals the minimum diameter of axle of variable cross-section mandrel in the described inner die joint.
7. prototyping silica gel mould according to claim 6, it is characterized in that: the variable cross-section mandrel of described silica gel mould is comprised of the up big and down small conical section on top and the straight section of bottom, and the inner die joint of described minimum overlaps with the lower surface of the straight section of variable cross-section mandrel.
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| CN201210440452.2A CN102922633B (en) | 2012-11-07 | 2012-11-07 | Prototyping silastic mould and manufacture method thereof |
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| CN201210440452.2A CN102922633B (en) | 2012-11-07 | 2012-11-07 | Prototyping silastic mould and manufacture method thereof |
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Cited By (3)
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| CN105328840A (en) * | 2015-12-04 | 2016-02-17 | 吉林大学 | Manufacturing method of sewing dark line-containing slush molding die groove entering die |
| CN105691078A (en) * | 2016-03-15 | 2016-06-22 | 江乐平 | Production technology for artware capable of reflecting distanced gradation third dimension |
| CN113172728A (en) * | 2021-04-21 | 2021-07-27 | 连云港东睦新材料有限公司 | Method for duplicating parts from original parts by adopting powder injection molding |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105328840A (en) * | 2015-12-04 | 2016-02-17 | 吉林大学 | Manufacturing method of sewing dark line-containing slush molding die groove entering die |
| CN105328840B (en) * | 2015-12-04 | 2018-02-16 | 吉林大学 | The preparation method that a kind of slush mold comprising sewing concealed wire enters channel mould |
| CN105691078A (en) * | 2016-03-15 | 2016-06-22 | 江乐平 | Production technology for artware capable of reflecting distanced gradation third dimension |
| CN113172728A (en) * | 2021-04-21 | 2021-07-27 | 连云港东睦新材料有限公司 | Method for duplicating parts from original parts by adopting powder injection molding |
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Granted publication date: 20150617 Termination date: 20211107 |