CN202934744U - Prototyping-based silastic mould - Google Patents

Abstract

The utility model discloses a prototyping-based silastic mould which is characterized in that variable cross-section spindles molded in a manner of corresponding to variable cross-section through holes of a corresponding prototype part are arranged on the silastic mould, inner part modular surfaces corresponding to the mould joints on the prototype part are arranged on the silastic mould, and the inner part modular surfaces on the silastic mould are all axially perpendicular to the variable cross-section spindle of the silastic mould and are crossed with the variable cross-section spindles; and the inner part modular surfaces at least have a minimal one, the axis diameter of the cross section of the minimal inner part modular surface which is crossed with one variable cross-section spindle is equal to the minimal axis diameter of the variable cross-section spindles. Narrow neck calyptriform parts can not be formed in the inner part modular surfaces, so that the problem of forced demoulding can not be caused during demoulding at the variable cross-section through holes, and the copy quality and service life of the prototyping-based silastic mould can be ensured.

Description

The prototyping silica gel mould

Technical field

The utility model belongs to the Mould Machining field shaping technique, is specifically related to a kind of prototyping silica gel mould.

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.Be different from the metal die of conventional mechanical processing based on the Rapid tooling of rapid prototyping manufacturing, take the bi-component high molecular synthetic material as pattern-making material (as silica gel, resin etc.) usually can make soft mold fast and accurately.

to 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 shell 101 and surrounding shell wall 102, 101 inner bottom surfaces that have towards described surrounding shell wall 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 described shell, convex with reinforcement plate 200 on 101 inner bottom surface 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, structure is more typical.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, paste adhesive tape on the face of choosing in advance on prototype parts 7, 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 minute mould, cut open silica gel from the outside die joint of reserving with blade, described inner die joint is formed silica gel mould is inner by the adhesive tape that is pasted with of prototype parts.After 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 due to structural reason, the die joint of choosing is not often 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 A place, plane 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 in the silica gel mould that obtains as shown in Figure 5 after the C face is pasted adhesive tape like this, patrix 12 divides mould from C face and counterdie, can have more on counterdie 13 like this and the crown part 131 of the thin neck of the corresponding moulding of variable cross-section through hole, this crown part in thin 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 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 the crown part 131 of thin neck is extruded the wearing and tearing in advance that once cause counterdie 13, affects the mould service precision, reduces the mold use life-span.

The utility model content

The purpose of this utility model is to provide a kind of prototyping silica gel mould, has 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 prior art.

for achieving the above object, the technical scheme of the prepared prototyping silica gel mould of the above-mentioned manufacture method of employing provided by the utility model 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 prototype parts on 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, at least have a cross section diameter of axle that intersects with described variable cross-section mandrel in described inner die joint and equal the minimum inner die joint of the minimum diameter of axle of variable cross-section mandrel.

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 beneficial effects of the utility model are: 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 inside die joint of silica gel mould provided by the utility model, 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 on Split mold and affect the crown part in the thin footpath of the demoulding, the problem of forced demoulding be can not produce, thereby reproduction quality and the service life of silica gel mould guaranteed.

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 in 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 utility model is done prepared silica gel mould;

Fig. 7 is the structural representation when in Fig. 6, the upper and lower mould of silica gel mould snaps together.

The specific embodiment

A kind of embodiment of manufacture method of prototyping silica gel mould, the manufacture method of the silica gel mould in this embodiment comprises the steps:

(1), choose one with the variable cross-section through hole of prototype parts axially vertical and with variable cross-section through hole crossing cross section 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 prototype parts as die joint, adhesive tape is pasted and fixed on one of them die joint, and the prototype parts after 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 with the described inside die joint that is pasted with corresponding coincidences of die joint of adhesive tape the outside die joint of presetting silica gel mould.

The variable cross-section through hole of the prototype parts in described step 1 is comprised of the up big and down small bellmouth section on top and the straight hole section of bottom, and the lower surface of the straight hole section in the variable cross-section hole of described smallest cross-sectional and prototype parts overlaps.

The high size of framed length and width in 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 be 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 taking out product from silicon rubber.

for as Fig. 1, automobile electric connector plug as prototype parts shown in Figure 2, the root of strengthening gusset 200 is positioned at inner bottom surface place 101 at the bottom of shell and that the lower surface straight hole section variable cross-section through hole overlaps just, smallest cross-sectional at the bottom of 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 shell is as die joint E, adhesive tape is sticked on the inner bottom surface of the convenient operation at the bottom of shell, then will strengthen on surrounding shell wall that gusset is adhesively fixed on plug connector housing 21, 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 with silica gel mould, the coincidence corresponding to 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 surrounding shell wall that will strengthen gusset 200 and plug connector housing 21 is adhesively fixed, be convenient to so on the one hand paste adhesive tape on the inner bottom surface at the bottom of the die joint after subdivision is shell, 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 are fastened just can obtain as shown in Figure 7 silica gel mould together, the upper and lower mould of this silica gel mould can form the die cavity corresponding with the prototype parts profile 30.Pour into a mould silica gel during use in the die cavity 30 of silica gel mould, 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 just and the inner bottom surface at the bottom of shell overlap, can directly carry out subdivision at the root of strengthening gusset like this, in other embodiments, also can choose other axis with the variable cross-section through hole vertical and cross sections of intersecting 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, after subdivision, prepared variable cross-section mandrel is softer, 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, 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 the rigidity of the variable cross-section mandrel after 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 in 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 prototype parts on 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, 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 silica gel mould in above-described embodiment, in other embodiments, a plurality of inner die joints can be set as required, as long as have at least an inner die joint of described minimum in these inner die joints on silica gel mould.

In the mandrel of the variable cross-section mandrel in above-described embodiment and Fig. 6, the variable cross-section through hole of concrete prototype parts is corresponding, 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 (2)

1. 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 prototype parts on 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 crossing 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 described inner die joint.

2. prototyping silica gel mould according to claim 1, 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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