CN102922633B - Prototyping silastic mould and manufacture method thereof - Google Patents
Prototyping silastic mould and manufacture method thereof Download PDFInfo
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- CN102922633B CN102922633B CN201210440452.2A CN201210440452A CN102922633B CN 102922633 B CN102922633 B CN 102922633B CN 201210440452 A CN201210440452 A CN 201210440452A CN 102922633 B CN102922633 B CN 102922633B
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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 Mould Machining field shaping technique, be specifically related to a kind of manufacture method of prototyping silica gel mould, also relate to a kind of prototyping silica gel mould using above-mentioned manufacture method to make simultaneously.
Background technology
Silica gel mould is mainly used in the fast Development of new product, especially the quick manufacture of small lot multi-assortment production.Rapid tooling based on rapid prototype manufacturing be different from conventional mechanical processing metal die, usually with bi-component high molecular synthetic material for pattern-making material (as silica gel, resin etc.), soft mold can be made fast and accurately.
To such as Fig. 1, the automobile electric connector plug as prototype parts shown in Fig. 2 carry out rapid die-manufacturing 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 plug connector housing, this plug connector housing to comprise at the bottom of shell 101 and surrounding shell wall 102, at the bottom of this shell, 101 have towards the inner bottom surface of described surrounding shell wall, at the bottom of the shell of plug connector housing, 101 are provided with five undersized variable cross-section through holes 100, this variable cross-section through hole 100 is made up 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 the inner bottom surface at the bottom of described shell, in plug connector housing at the bottom of shell 101 inner bottom surface on be convexly equipped with reinforcement plate 200, the degree of depth of described variable cross-section through hole 100 is larger than very with diameter, structure comparison typical case.During molding, need to make one wooden framed 8 according to the physical dimension of prototype parts 7 in advance, pre-configured satisfactory silicon rubber, carries out degassed process to silicon rubber.In addition, when concrete molding, for ensureing normal parting, prototype parts 7 on the face chosen in advance paste adhesive tape, through hole on original shape part is blocked by this adhesive tape, when parting, separates mould obtain outside die joint 6 according to the position blade chosen in advance, and adhesive tape present position is the inside die joint 4 of silica gel mould, upper and lower mould from outside die joint and inner die joint separated.During concrete molding, the prototype parts being pasted with adhesive tape is in advance fixed on prefabricated framed in, the silicon rubber configured is poured into framed in, after silica gel solidification, from outside die joint and inner die joint, silica gel mould is divided into upper die and lower die, when parting, cut open silica gel from reserved outside die joint blade, described inside die joint then formed in silica gel mould inside by the adhesive tape be pasted with of prototype parts.After parting, prototype parts taken out, can obtain the silica gel mould of prototype parts, this silica gel mould can use as low-volume copying part.
For steel die, the number of times of use can reach 2-10 ten thousand times.Manufacturing process is complicated, expensive, and the die joint of mould is through repeatedly optimum option optimal case.And silica gel mould can due to structural reason, the die joint chosen is not often optimum face, for the variable cross-section through-hole structure 11 shown in Fig. 4, 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 is the desirable die joint of part, but due to the sectional area of plane A and plane B 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.Make after adhesive tape is pasted in C face like this in the silica gel mould obtained as shown in Figure 5, patrix 12 carries out parting from C face and counterdie, such counterdie 13 can have more the crown part 131 of shaping thin neck corresponding to variable cross-section through hole, this crown part in thin footpath is on counterdie, certainly, when parting, by means of the high resiliency of silicon rubber, the distortion of the crown part of this thin neck can be utilized to extrude and forced demoulding from the variable cross-section through hole of prototype parts, prototype parts 11 and counterdie 13 are separated by force.But when using this silica gel mould to make product, each demoulding all needs crown for thin neck part 131 extruded once and cause the advanced wear of counterdie 13, affects mould service precision, reduce 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, to solve the technical problem that the silica gel mould made in prior art exists the crown part of answering with the reducing hole of prototype parts; Meanwhile, the present invention also provides a kind of prototyping silica gel mould using 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, and this manufacture method comprises the steps,
(1), at least choose one axially vertical with the variable cross-section through hole of prototype parts, and the cross section crossing with variable cross-section through hole is split surface, at least there is in selected cross section the smallest cross-sectional that a cross-sectional aperture crossing with described variable cross-section through hole equals variable cross-section through hole minimum-value aperture, prototype parts is carried out subdivision at described split surface place, choose and prototype parts is interface with split surface and two opposing end surfaces in the two subdivision portions that subdivision obtains are die joint, adhesive tape is pasted and fixed on one of them die joint, and by the prototype parts fixed Combination after subdivision together,
(2), fixed Combination prototype parts is together fixed on prefabricated framed in;
(3), to framed middle cast silicon rubber;
(4), after silicon rubber solidification, silica gel mould is carried out parting to obtain Split mold from the inside die joint that overlaps corresponding to the described die joint being pasted with adhesive tape and default outside die joint.
The variable cross-section through hole of the prototype parts in described step one is made up 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 described step one is electric connector plug connector, this electric connector plug connector comprises plug connector housing, this electric connector housing has at the bottom of shell and surrounding shell wall, have towards the inner bottom surface of described surrounding shell wall at the bottom of this shell, variable cross-section through hole in described prototype parts is arranged at the bottom of described shell, the lower surface of the straight hole section of described variable cross-section through hole overlaps with the inner bottom surface at the bottom of described shell, on the inner bottom surface of housing, reinforcement plate is convexly equipped with in plug connector housing, reinforcement gusset and plug connector housing subdivision are opened in reinforcement buttress portion by split surface corresponding with described smallest cross-sectional in described step one, adhesive tape be pasted and fixed at the bottom of connector housing as on the inner bottom surface of die joint, and together with the reinforcement gusset after subdivision is adhesively fixed with the surrounding shell wall of plug connector housing.
The size corresponding 50mm larger than the size of the length, width and height of prototype parts respectively of the framed length, width and height in described step 2.
The technical scheme of the prototyping silica gel mould obtained by the above-mentioned manufacture method of employing provided by the present invention is: prototyping silica gel mould, this silica gel mould have shaping variable cross-section mandrel corresponding with the variable cross-section through hole of corresponding prototype parts, described Silicon moulds have the inside die joint corresponding with the die joint in prototype parts, inside die joint on described silica gel mould is all axially vertical with the variable cross-section mandrel of silica gel mould, and it is crossing with variable cross-section mandrel, at least there is in described inside die joint the minimum inner die joint that a cross section diameter of axle crossing with described variable cross-section mandrel equals the minimum diameter of axle of variable cross-section mandrel.
The variable cross-section mandrel of described silica gel mould is made up of the up big and down small conical section on top and the straight section of bottom, and described minimum inner die joint overlaps with the lower surface of the straight section of variable cross-section mandrel.
The invention has the beneficial effects as follows: in the manufacture method of silica gel mould provided by the present invention, first prototype parts is carried out subdivision at split surface place, and the die joint obtained after subdivision pastes adhesive tape, because the selected smallest cross-sectional as there is the cross-sectional aperture crossing with described variable cross-section through hole equaling variable cross-section through hole minimum-value aperture in the cross section of split surface, at this smallest cross-sectional place, subdivision is carried out to prototype parts, all or part of of the variable cross-section mandrel of corresponding with variable cross-section through hole so shaping silica gel mould is separated with the Split mold of silica gel mould at the die joint place, inside corresponding with this smallest cross-sectional, the crown part in thin footpath affecting the demoulding would not be formed like this on Split mold, the problem of forced demoulding can not be produced, thus ensure reproduction quality and the service life of silica gel mould.
At least there is in the inside die joint of silica gel mould provided by the present invention the minimum inner die joint that a cross section diameter of axle crossing with described variable cross-section mandrel equals the minimum diameter of axle of variable cross-section mandrel, all or part of of variable cross-section mandrel is being separated with the Split mold of silica gel mould with this place by this minimum inner die joint, the crown part in thin footpath affecting the demoulding would not be formed like this on Split mold, the problem of forced demoulding can not be produced, thus ensure reproduction quality and the service life of silica gel mould.
Accompanying drawing explanation
Fig. 1 is existing a kind of structural representation with the electric connector plug connector of variable cross-section through hole;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 uses the electric connector plug connector shown in Fig. 1 as the structural representation of the silica gel mould made by prototype parts;
Fig. 4 is the structural representation of variable cross-section throughhole portions in Fig. 2;
Fig. 5 is the decomposition texture schematic diagram of the silica gel mould corresponding with the prototype parts shown in Fig. 4;
Fig. 6 is the decomposition texture schematic diagram that the manufacture method of silica gel mould provided by the present invention does obtained silica gel mould;
Fig. 7 is the structural representation of the upper and lower mould of silica gel mould in Fig. 6 when snapping together.
Detailed description of the invention
An embodiment for the manufacture method of prototyping silica gel mould, the manufacture method of the silica gel mould in this embodiment comprises the steps:
(1), choosing one with axial vertical and crossing with the variable cross-section through hole cross section of the variable cross-section through hole of prototype parts is split surface, this cross section is the smallest cross-sectional that the cross-sectional aperture crossing with described variable cross-section through hole equals variable cross-section through hole minimum-value aperture, prototype parts is carried out subdivision at described split surface place, choose and prototype parts is interface with split surface and two-part two opposing end surfaces that subdivision obtains are die joint, adhesive tape is pasted and fixed on one of them die joint, and the prototype parts after subdivision is retightened combines;
(2), the prototype parts of fixed Combination prototype parts is together fixed on prefabricated framed in;
(3), to framed middle cast silicon rubber;
(4), after silicon rubber solidification, silica gel mould is carried out parting to obtain Split mold from the inside die joint that overlaps corresponding to the described die joint being pasted with adhesive tape and default outside die joint.
The variable cross-section through hole of the prototype parts in described step one is made up 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 size 50mm larger than the size of the length, width and height of prototype parts respectively of the framed length, width and height in described step 2.The undersized result of use that can affect silicon rubber of length, width and height framed herein, is also unfavorable for the normal cast of silicon rubber.And oversize, both cause the waste of silica gel also can reduce the flexibility of silica gel, increase the difficulty of taking out product from silicon rubber.
For such as Fig. 1, the automobile electric connector plug as prototype parts shown in Fig. 2, the root strengthening gusset 200 is positioned at the inner bottom surface place overlapped with the lower surface of the straight hole section of variable cross-section through hole of at the bottom of shell 101 just, smallest cross-sectional in the corresponding above-mentioned steps one of the inner bottom surface of 101 at the bottom of shell, like this, as shown in Figure 6, by electric connector plug connector at the bottom of shell 101 inner bottom surface carry out subdivision, reinforcement gusset 200 and plug connector housing 21 subdivision are opened, like this when making silica gel mould for this electric connector plug connector, inner bottom surface at the bottom of shell is as die joint E, adhesive tape is pasted onto on the inner bottom surface of the convenient operation at the bottom of shell, then reinforcement gusset is adhesively fixed on the surrounding shell wall of plug connector housing 21, such plug connector housing 21 is together with reinforcement gusset 200 fixed Combination, put it into framed in, to framed middle injection silicon rubber, after silicon rubber solidification, silica gel mould is carried out parting from inner die joint and the outside die joint that presets and obtains patrix 22 and counterdie 23 respectively, this inner die joint is corresponding with the inner bottom surface being pasted with adhesive tape to be overlapped.Only reinforcement gusset 200 and plug connector housing 21 subdivision are opened herein, and subdivision is not carried out to plug connector housing 21, and then be adhesively fixed strengthening the surrounding shell wall of gusset 200 with plug connector housing 21, such one side is convenient to the inner bottom surface at the bottom of the die joint after subdivision and shell pastes adhesive tape, avoid the crown part of thin neck occurring affecting the demoulding, on the other hand, also reinforcement gusset 200 is convenient to retighten on plug connector housing 21, be convenient to the precision ensureing prototype parts, improve the precision of the silica gel mould made.Just can obtain silica gel mould as shown in Figure 7 together with being fastened with counterdie 23 by patrix 22 shown in Fig. 6, the upper and lower mould of this silica gel mould can form the die cavity 30 corresponding with prototype parts profile.In the die cavity 30 of silica gel mould, pour into a mould silica gel during use, required plug connector can be obtained.
In the above-described embodiments, because the lower surface of the straight hole section in the variable cross-section hole in prototype parts overlaps with the inner bottom surface at the bottom of shell just, directly can carry out subdivision at the root strengthening gusset like this, in other embodiments, also can choose other axes normal with variable cross-section through hole and the cross section crossing with 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, when can avoid pouring into a mould, there is the crown part in thin footpath affecting the demoulding.
The degree of depth of the variable cross-section through hole in above-described embodiment is little, and in other embodiments, if when the degree of depth running into variable cross-section through hole is larger, variable cross-section mandrel obtained after a subdivision softer, rigidity is inadequate.During actual molding, can get several axially vertical with the variable cross-section through hole of prototype parts by multiselect, and the cross section crossing with variable cross-section through hole is split surface, as long as at least have the smallest cross-sectional that cross-sectional aperture that a described variable cross-section through hole intersects equals variable cross-section through hole minimum-value aperture in these cross sections, after multistage subdivision is carried out to the variable cross-section through hole of prototype parts, variable cross-section mandrel corresponding with variable cross-section through hole so just can sectional forming, be convenient to carry out the demoulding according to the concrete size of variable cross-section through hole on the one hand, also can improve on the other hand shaping after the rigidity of variable cross-section mandrel.
Variable cross-section through hole in above-described embodiment is made up 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, variable cross-section through hole can be up big and down small bellmouth, now, 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 prototyping silica gel mould obtained by said method, silica gel mould in this embodiment comprises patrix 22 and the counterdie 23 of corresponding fastening, on, counterdie fastens and forms the die cavity 30 corresponding with prototype parts profile, shaping variable cross-section mandrel corresponding with the variable cross-section through hole of corresponding prototype parts is convexly equipped with in the bottom of patrix, silica gel mould has the inside die joint corresponding with the die joint in prototype parts, die joint on this silica gel mould is all axially vertical with the variable cross-section mandrel of silica gel mould, and it is crossing with variable cross-section mandrel, described inside die joint is that the sectional axis crossing with described variable cross-section mandrel is through equaling the minimum inner die joint of the minimum diameter of axle of variable cross-section mandrel, this variable cross-section mandrel is made up of the up big and down small conical section on top and the straight section of bottom, minimum inner die joint overlaps with the lower surface of the straight section of non-uniform shaft.
In the die cavity 30 of silica gel mould, pouring into a mould silica gel during use, after silica gel solidification, upper die and lower die are being separated from inner die joint and outside die joint, required plug connector can be obtained.
Silica gel mould in above-described embodiment is only provided with an inner die joint, in other embodiments, can multiple inner die joint be set as required on silica gel mould, as long as at least there is the minimum inner die joint described in these inner die joints.
The mandrel of the variable cross-section mandrel in above-described embodiment is corresponding with the variable cross-section through hole of prototype parts concrete in Fig. 6, in other embodiments, the variable cross-section mandrel of silica gel mould also can be other structures, 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 choose one axially vertical with the variable cross-section through hole of prototype parts, and the cross section crossing with variable cross-section through hole is split surface, at least there is in selected cross section the smallest cross-sectional that a cross-sectional aperture crossing with described variable cross-section through hole equals variable cross-section through hole minimum-value aperture, prototype parts is carried out subdivision at described split surface place, choose and prototype parts is interface with split surface and two opposing end surfaces in the two subdivision portions that subdivision obtains are die joint, adhesive tape is pasted and fixed on one of them die joint of two die joints of the opposing end surface each other that described subdivision obtains, and by the prototype parts fixed Combination after subdivision together,
(2), fixed Combination prototype parts is together fixed on prefabricated framed in;
(3), to framed middle cast silicon rubber;
(4), after silicon rubber solidification, silica gel mould is carried out parting to obtain Split mold from the inside die joint that overlaps corresponding to the described die joint being pasted with adhesive tape and default outside die joint, avoids forced demoulding.
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 described step one is made up 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 described step one is electric connector plug connector, this electric connector plug connector comprises plug connector housing, this plug connector housing has at the bottom of shell and surrounding shell wall, have towards the inner bottom surface of described surrounding shell wall at the bottom of this shell, variable cross-section through hole in described prototype parts is arranged at the bottom of described shell, the lower surface of the straight hole section of described variable cross-section through hole overlaps with the inner bottom surface at the bottom of described shell, on the inner bottom surface of housing, reinforcement plate is convexly equipped with in plug connector housing, reinforcement gusset and plug connector housing subdivision are opened in reinforcement buttress portion by split surface corresponding with described smallest cross-sectional in described step one, adhesive tape be pasted and fixed at the bottom of connector housing as on the inner bottom surface of die joint, and together with the reinforcement gusset after subdivision is adhesively fixed with the surrounding shell wall of plug connector housing.
4. the manufacture method of prototyping silica gel mould according to claim 1, is characterized in that: the variable cross-section through hole in the prototype parts in described step one is up big and down small bellmouth, and described smallest cross-sectional overlaps with the lower surface of the miner diameter end of bellmouth.
5. the manufacture method of the prototyping silica gel mould according to claim 1 or 2 or 3 or 4, is characterized in that: the size corresponding 50mm larger than the size of the length, width and height of prototype parts respectively of the framed length, width and height in described step 2.
6. use the prototyping silica gel mould that manufacture method as claimed in claim 1 is obtained, this silica gel mould have shaping variable cross-section mandrel corresponding with the variable cross-section through hole of corresponding prototype parts, described silica gel mould have the inside die joint corresponding with the die joint in prototype parts, inside die joint on described silica gel mould is all axially vertical with the variable cross-section mandrel of silica gel mould, and it is crossing with variable cross-section mandrel, it is characterized in that: at least there is in described inside die joint the minimum inner die joint that a cross section diameter of axle crossing with described variable cross-section mandrel equals the minimum diameter of axle of variable cross-section mandrel.
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 made up of the up big and down small conical section on top and the straight section of bottom, and described minimum inner die joint overlaps with the lower surface of the straight section of variable cross-section mandrel.
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| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN102922633A CN102922633A (en) | 2013-02-13 |
| CN102922633B true CN102922633B (en) | 2015-06-17 |
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| 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 |
| CN113172728B (en) * | 2021-04-21 | 2022-07-19 | 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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| CN101239491A (en) * | 2008-02-04 | 2008-08-13 | 吴滄松 | Resin composition mold and manufacturing method thereof and resin composition |
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| SE8605560D0 (en) * | 1986-12-23 | 1986-12-23 | Sca Emballage | MOLD |
| CN101239491A (en) * | 2008-02-04 | 2008-08-13 | 吴滄松 | Resin composition mold and manufacturing method thereof and resin composition |
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| 基于硅胶模技术的小批量塑料件快速制造;王艳萍;《塑料科技》;20091130;第37卷(第11期);62-65 * |
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