CN103660173A - Mould for producing precise plastic parts - Google Patents
Mould for producing precise plastic parts Download PDFInfo
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- CN103660173A CN103660173A CN201310658636.0A CN201310658636A CN103660173A CN 103660173 A CN103660173 A CN 103660173A CN 201310658636 A CN201310658636 A CN 201310658636A CN 103660173 A CN103660173 A CN 103660173A
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- mould
- runner
- flow channel
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- production
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/38—Cutting-off equipment for sprues or ingates
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a mould for producing precise plastic parts, and aims to provide a mould, which can automatically separate the product and the plastic in the flow channel during the mould-splitting process, can guarantee the complete and stable separation, and maintains an intact appearance. The mould comprising a upper mould, a lower mould, a mould cavity, and a flow channel; a submergence section is arranged on the joint part between the mould cavity and the flow channel; a upper contour line, which locates in the highest part of the submergence section, and a lower contour line, which locates in the lowest part of the submergence section, are both straight lines, wherein the angle difference between the angle that is formed by the upper contour line and the horizontal plane and the angel that is formed by the lower contour line and the horizontal plane is more than 5 degrees; two opposite slide blocks are arranged in the upper mould, the two slide blocks move in a same straight line but in different directions; two inclined guide pillars, whose upper ends are inward inclined, are arranged in the upper mould, the inclined guide pillars penetrate the upper surfaces and the lower surfaces of the slide blocks; the flow channel is connected to a recessed groove, and the recessed groove is arranged below the flow channel, and communicates with the flow channel. The mould has the advantages that: during a mould splitting process of thin-wall products, automatic separation between the products and the plastic in the flow channel can be successfully achieved, the separation process is rapid and complete, furthermore, the fracture surface is smooth, the products are intact, and the mould splitting process is stable.
Description
Technical field
The invention belongs to mould applications, relate in particular to a kind of mould for the production of precision plastic rubber part.
Background technology
In the design of a lot of precision plastic rubber parts, while especially relating to some optical precision plastic parts, because structure itself is complicated, and size, appearance requirement are high, and product is little, so the manufacture of mould and exploitation are had higher requirement, should can guaranteed quality, can guarantee again the output of every day.But, a big chunk in this series products, having an obvious feature is exactly that wall thickness is very thin, allows to only have 0.5mm left and right into the position bore of glue, and some is even below 0.35mm, if the disconnected glue outlet structure of now design routine, for example put Jiao Kou, conventional submarine Jiao Kou, the disconnection of at all have no idea normally to realize product and runner plastics, its reason is exactly the very thin and insufficient strength of product, be unable to bear and take vertical direction as main tearing power, can cause the related damage of drawing of product even to break.So now often can only adopt conventional side, enter the structure of glue, namely runner Jiao Kou and product connect together, after depanning, by rear processing, make product separated with runner plastics, but so, directly caused the increase of rear manufacturing procedure, and the also unusual end of efficiency, in rear process, may cause secondary damage again, both cost of idleness, affected again efficiency.
Summary of the invention
The present invention is that product and runner plastics can not intact separated, product rapid wears when the product depanning in order to overcome in prior art precision plastic rubber mould, thereby therefore can only take rear processing separation to cause the deficiency that cost is higher, efficiency is lower, provide a kind of when parting automatically products of separated and runner plastics, and can ensure and cut off clean, separating stable, the mould that product itself is intact.
To achieve these goals, the present invention is by the following technical solutions:
A kind of mould for the production of precision plastic rubber part, comprise patrix, counterdie, die cavity, described die cavity is communicated with a runner, described runner is in cavity side top, described runner comprises at least one turnaround section, described runner contact die cavity place has a dive section, being positioned at dive section goes up most, the upper outline line of below, lower whorl profile is straight line, upper outline line, the difference of lower whorl profile and horizontal plane angulation is greater than 5 degree, described dive section is by the first half, Lower Half forms, the length of Lower Half is at least the twice of first half length, described lower portion sets low the main part in runner, in described patrix, be provided with two relative slide blocks, glide direction is mutually contrary and be on same straight line, described patrix is provided with the Angle Pin of two upper end introversions, described Angle Pin penetrates on slide block, lower surface, described runner connects a deep gouge, described deep gouge is in runner below and is communicated with runner.If object global shape is irregular, when being subject to external force, stress easily concentrates on the size smaller part of the minimum place of size, thinnest part or local linkage section.Dive section is the linkage section of Jiao Kou place and part, during depanning, the power that makes runner plastics and product be separated from each other if having, on adding, the difference of outline line, lower whorl profile and horizontal plane angulation is greater than 5 degree, Jiao Kou place overall structure is irregular, so stress can mainly concentrate on Jiao Kou place.During injection mo(u)lding, molten plastic also enters deep gouge from runner when runner, Jiao Kou enter die cavity, and with moulding together with plastics in runner, cooling after, form a downward projection.During parting discharging, upper and lower mould is separated, slide block is under the guiding of Angle Pin, start transverse shifting, now due to the existence of projection, connecting the runner plastics of projection and the relative position between slide block changes, runner plastics are upspring towards patrix direction, between product in runner plastics and die cavity, form change in location, produce the tearing power that laterally adds vertical direction, strengthening centrifugation, linkage section to product and runner plastics, also be Jiao Kou place, moment pull-off force be very large, can effectively realize fast automatic disconnection Jiao Kou.
As preferably, described deep gouge is in runner near a side of die cavity, and the lateral margin of described deep gouge vertical section is S-shaped.The projection that raising forms in deep gouge with flow to the bonding strength of plastics, and relax the stressed of runner plastics and projection place breaking for Jiao Kou when pull-off force is provided, guarantee to break to only occur in Jiao Kou place the intact common depanning that links together of remainder energy.
As preferably, described upper outline line and horizontal plane angulation are greater than lower whorl profile and horizontal plane angulation, and differential seat angle is 15 to 85 degree.
As preferably, the described first half comprises two upper sides, described Lower Half comprises two downsides, upper side, the corresponding coincidence of downside form two lateral surfaces of dive section, two lateral surfaces are the inclined-plane of top flare, and two lateral surface bottom spacing are minimum and consistent with the height of flow field end opening.Flow field end opening part is exactly Jiao Kou place, lateral surface bottom spacing is minimum and consistent with the height of flow field end opening, being equivalent to Jiao Kou place, to have two edge lines be isometric, this has just improved the self-symmetry of glue outlet structure to a certain extent, when being subject to concentrated stress generation fracture, there is self-symmetric Jiao Kou stressed more balanced, more simultaneously stressed on the whole section of convergence on section, therefore can better realize smoothly and breaking, reduce product and the adhesion of glue mouth plastics, related possibility of drawing damage, prevent that product depanning from damaging.Two lateral surfaces are the inclined-plane of top flare, so cross section, Jiao Kou place is up big and down small, improve the relative molten plastic amount of this upper part, place, improve speed and pressure that molten plastic enters die cavity, be beneficial to the filling of plastics, ensure the complete of product and Jiao Kou place, be also beneficial to follow-up parting and disconnect.
As preferably, the difference of two lateral surfaces and perpendicular angulation is different, and two described lateral surfaces are identical with the difference of upper outline line, lower whorl profile and horizontal plane angulation with the difference of perpendicular angulation.Limit two lateral surfaces, the while just defines outline line, lower whorl profile respectively has two, is in respectively on contoured surface, bottom profiled face.Also as above contoured surface, bottom profiled face are such for two lateral surfaces, have different gradients, thereby make Jiao Kou place become gradient structure more than, further put forward the effect of high stress concentrations.And two lateral surfaces are identical with the difference of upper outline line, lower whorl profile and horizontal plane angulation with the difference of perpendicular angulation, make again comparatively rule of glue mouth section part, there is certain global symmetry, stressed, break in process, stress is evenly distributed on section, the surfacing after breaking.
As preferably, described counterdie is provided with the slide rail of level, and described slide block and slide rail are slidably connected.By slide rail, control the direction of motion of slide block, guarantee the stable of minute mold process, also make Jiao Kou place automatically rupture smoothly and separation of products.
The invention has the beneficial effects as follows: when thin-wall product parting, can realize smoothly the automatic fracture of product and runner plastics, fracture process is clear-cut fast, can ensure that section is smooth intact the and parting process stabilization of product.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is Facad structure schematic diagram of the present invention;
Fig. 3 is the top view of runner of the present invention and product junction;
Fig. 4 is the side view of runner of the present invention and product junction;
Fig. 5 is the structural representation at the embodiment of the present invention 2 Jiao Kou places.
In figure: patrix 1, counterdie 2, runner 3, dive section 4, Angle Pin 5, slide block 6, product 7, projection 8, lateral surface 9, slide rail 10.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment 1: as Fig. 1, Fig. 2, Fig. 3, a kind of mould for the production of precision plastic rubber part shown in Fig. 4, comprise patrix 1, counterdie 2, die cavity, described die cavity is communicated with a runner 3, described runner 3 is in cavity side top, described runner 3 comprises at least one turnaround section, described runner 3 contact die cavity places have a dive section 4, being positioned at dive section 4 goes up most, the upper outline line of below, lower whorl profile is straight line, upper outline line, the difference of lower whorl profile and horizontal plane angulation is greater than 5 degree, described dive section 4 is by the first half, Lower Half forms, the length of Lower Half is at least the twice of first half length, described lower portion sets low in the main part of runner 3, in described patrix 1, be provided with two relative slide blocks 6, glide direction is mutually contrary and be on same straight line, described patrix 1 is provided with the Angle Pin 5 of two upper end introversions, described Angle Pin 5 penetrates on slide block 6, lower surface, described runner 3 connects a deep gouge, described deep gouge is in runner 3 belows and is communicated with runner 3.Described deep gouge is in runner 3 near a side of die cavity, and the lateral margin of described deep gouge vertical section is S-shaped.Described counterdie 2 is provided with the slide rail 10 of level, and described slide block 6 is slidably connected with slide rail 10.
During injection mo(u)lding, molten plastic also enters deep gouge from runner 3 when runner 3, Jiao Kou enter die cavity, and with moulding together with plastics in runner 3, cooling after, form a downward projection 8.During parting discharging, upper and lower mould is separated, slide block 6 is under the guiding of Angle Pin 5, start transverse shifting, now due to the existence of projection 8, connecting the runner of projection 8 and the relative position between slide block 6 changes, runner is upspring towards patrix 1 direction, between product 7 in runner and die cavity, form change in location, produce the tearing power that laterally adds vertical direction, strengthening centrifugation, in addition the many gradients glue outlet structure in addition having with dive section 4 and product 7 junctions, linkage section to product 7 and runner, also be Jiao Kou place, moment, pull-off force was very large, can effectively realize fast automatic disconnection Jiao Kou, and, because the pull-off force of moment is very large, concentrate on again Jiao Kou, therefore section part can be comparatively smooth intact.
Embodiment 2: as shown in Figure 1, Figure 2, a kind of mould for the production of precision plastic rubber part shown in Fig. 3, Fig. 4, Fig. 5, its basic structure and embodiment are with embodiment 1, difference is: described upper outline line and horizontal plane angulation are greater than lower whorl profile and horizontal plane angulation, and differential seat angle is 15 to 85 degree.The described first half comprises two upper sides, described Lower Half comprises two downsides, upper side, the corresponding coincidence of downside form two lateral surfaces 9 of dive section 4, two lateral surfaces 9 are the inclined-plane of top flare, and two lateral surface 9 bottom spacing are minimum and consistent with the open-ended height of runner 3.Runner 3 end openings places are exactly Jiao Kou place, lateral surface 9 bottom spacing are minimum and consistent with the open-ended height of runner 3, being equivalent to Jiao Kou place, to have two edge lines be isometric, this has just improved the self-symmetry of glue outlet structure to a certain extent, when being subject to concentrated stress fracture, there is self-symmetric Jiao Kou stressed more balanced, more simultaneously stressed on the whole section of convergence on section, therefore can better realize smoothly and breaking, reduce the possibility of product 7 and the adhesion of glue mouth plastics, prevent that product 7 depannings from damaging.Two lateral surfaces 9 are different with the difference of perpendicular angulation, and two described lateral surfaces 9 are identical with the difference of upper outline line, lower whorl profile and horizontal plane angulation with the difference of perpendicular angulation.Limit two lateral surfaces 9, the while just defines outline line, lower whorl profile respectively has two, is in respectively on contoured surface, bottom profiled face.Also as above contoured surface, bottom profiled face are such for two lateral surfaces 9, have different gradients, thereby make Jiao Kou place become gradient structure more than, further put forward the effect of high stress concentrations.And two lateral surfaces 9 are identical with the difference of upper outline line, lower whorl profile and horizontal plane angulation with the difference of perpendicular angulation, make again comparatively rule of glue mouth section part, there is certain global symmetry, stressed, break in process, stress is evenly distributed on section, the surfacing after breaking.
Claims (7)
1. the mould for the production of precision plastic rubber part, comprise patrix (1), counterdie (2), die cavity, it is characterized in that, described die cavity is communicated with a runner (3), described runner (3) is in cavity side top, described runner (3) comprises at least one turnaround section, described runner (3) contact die cavity place has a dive section (4), being positioned at dive section (4) goes up most, the upper outline line of below, lower whorl profile is straight line, upper outline line, the difference of lower whorl profile and horizontal plane angulation is greater than 5 degree, described dive section (4) is by the first half, Lower Half forms, the length of the first half is at least the twice of Lower Half length, described lower portion sets low in the main part of runner (3), in described patrix (1), be provided with two relative slide blocks (6), glide direction is mutually contrary and be on same straight line, described patrix (1) is provided with the Angle Pin (5) of two upper end introversions, described Angle Pin (5) penetrates on slide block (6), lower surface, described runner (3) connects a deep gouge, described deep gouge is in runner (3) below and is communicated with runner (3).
2. a kind of mould for the production of precision plastic rubber part according to claim 1, is characterized in that, described deep gouge is in runner (3) near a side of die cavity, and the lateral margin of described deep gouge vertical section is S-shaped.
3. a kind of mould for the production of precision plastic rubber part according to claim 1 and 2, is characterized in that, described upper outline line and horizontal plane angulation are greater than lower whorl profile and horizontal plane angulation, and differential seat angle is 15 to 85 degree.
4. a kind of mould for the production of precision plastic rubber part according to claim 1, it is characterized in that, the described first half comprises two upper sides, described Lower Half comprises two downsides, upper side, the corresponding coincidence of downside form two lateral surfaces (9) of dive section (4), two lateral surfaces (9) are the inclined-plane of top flare, and two lateral surfaces (9) bottom spacing is minimum and consistent with the open-ended height of runner (3).
5. a kind of mould for the production of precision plastic rubber part according to claim 4, is characterized in that, two lateral surfaces (9) are different with the difference of perpendicular angulation.
6. a kind of mould for the production of precision plastic rubber part according to claim 5, is characterized in that, described two lateral surfaces (9) are identical with the difference of the difference of perpendicular angulation and upper outline line, lower whorl profile and horizontal plane angulation.
7. according to a kind of mould for the production of precision plastic rubber part described in claim 1 or 4 or 5 or 6, it is characterized in that, described counterdie (2) is provided with the slide rail (10) of level, and described slide block (6) is slidably connected with slide rail (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310658636.0A CN103660173B (en) | 2013-12-06 | 2013-12-06 | A kind of mould for the production of precise plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310658636.0A CN103660173B (en) | 2013-12-06 | 2013-12-06 | A kind of mould for the production of precise plastic |
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| Publication Number | Publication Date |
|---|---|
| CN103660173A true CN103660173A (en) | 2014-03-26 |
| CN103660173B CN103660173B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310658636.0A Active CN103660173B (en) | 2013-12-06 | 2013-12-06 | A kind of mould for the production of precise plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216248A (en) * | 2015-10-29 | 2016-01-06 | 勋龙精密模具(昆山)有限公司 | Cutting apparatus in a kind of mould |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003039456A (en) * | 2001-07-31 | 2003-02-13 | Inoac Corp | Mold for molding foamed urethane roll |
| CN101347995A (en) * | 2007-07-16 | 2009-01-21 | 汉达精密电子(昆山)有限公司 | Pin point glue inlet flow passage structure |
-
2013
- 2013-12-06 CN CN201310658636.0A patent/CN103660173B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003039456A (en) * | 2001-07-31 | 2003-02-13 | Inoac Corp | Mold for molding foamed urethane roll |
| CN101347995A (en) * | 2007-07-16 | 2009-01-21 | 汉达精密电子(昆山)有限公司 | Pin point glue inlet flow passage structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216248A (en) * | 2015-10-29 | 2016-01-06 | 勋龙精密模具(昆山)有限公司 | Cutting apparatus in a kind of mould |
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| Publication number | Publication date |
|---|---|
| CN103660173B (en) | 2016-01-20 |
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| C14 | Grant of patent or utility model | ||
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Address after: 315400 No.184, Shunyu West Road, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Bellon Precision Technology Co.,Ltd. Address before: 315400 No.184, Shunyu West Road, Yuyao City, Ningbo City, Zhejiang Province Patentee before: Ningbo Beilong Precision Molding Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 315400 No.184, Shunyu West Road, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Ningbo Beilong Precision Molding Co.,Ltd. Address before: 315400 C20 building, Far East Industrial City, Ningbo, Zhejiang, Yuyao Patentee before: NINGBO BEILONG PRECISION MOLDING Co.,Ltd. |
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| CP03 | Change of name, title or address |