CN1006537B - Hot runner mold for three-layer molding - Google Patents
Hot runner mold for three-layer moldingInfo
- Publication number
- CN1006537B CN1006537B CN 85103567 CN85103567A CN1006537B CN 1006537 B CN1006537 B CN 1006537B CN 85103567 CN85103567 CN 85103567 CN 85103567 A CN85103567 A CN 85103567A CN 1006537 B CN1006537 B CN 1006537B
- Authority
- CN
- China
- Prior art keywords
- geat
- flow path
- hole
- hot flow
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to a hot runner mold. Two resin channels are formed by a pouring gate pipe and a pouring gate cap. A hot runner pouring gate has a double structure, and therefore, the hot runner pouring gate is beneficial to the injection and the filling of two different resin. The present invention is suitable for the occasions of forming a plurality of synthetic resin mold products of a three-layer structure which comprises an internal layer, an outer layer and a middle layer by the hot runner mold.
Description
The present invention relates to a hot runner mould, be used for an injection molding operation to make the occasion of a series of molded product of synthetic resin.
In the past, when three layers of mechanograph are made, adopt one to comprise the dual geat of an interior geat usually, and use an outer geat.This dual geat directly inserts the mold cast gate.The resin that injects mold from two geats does not mix mutually, and the resin that injects from interior geat forms an intermediate layer, and the resin that injects from outer geat forms internal layer and all skins.
On the other hand, in order to obtain a plurality of mechanographs by an injection molding operation, adopt a kind of hot runner mould, its each geat inserts the cast gate of a series of die cavitys of mold.
This hot runner mould has a hot flow path, is used to connect all cast gates and all geats, makes the molten resin that injects from cast gate be assigned to each hot flow path geat through hot flow path.
When above-mentioned hot runner mould and dual geat were used for three layers of mechanograph of injection moulding, because the distance from the hot runner mould cast gate to each hot flow path geat has the level of two kinds of different resins to be three layers of shape, level obtained by resin is injected hot runner mould.Even so, before resin arrives all geats of hot flow path, because flow resistance makes to occur turbulent flow in the level.Sometimes different resins mixes, so can not obtain all three layers of mechanographs of sharp outline of ectonexine and intermediate layer.
In view of mentioned above, carried out such trial: in a hot flow path body, have a series of cast gates and hot flow path, the runner of one dual transport stream road geat and equidistant separation links to each other according to the number of geat, different at that time resins injects and is full of die cavity from the interior geat of runner geat and outer geat, the mechanograph of formation three-decker.
Because paired, the concentric hot flow path geat of above-mentioned hot runner mould is directly installed on the hot runner mould, thereby being connected between a series of branches runner and the hot flow path make difficulty, and along with the increase of molding number of times, resin is trapped in the coupling part easily, make resin overheated, thereby occur breaking or this phenomenon of carbonization.
The present invention has reached the purpose that solves the problem in the above-mentioned prior art.An object of the present invention is to provide a kind of new improved hot runner mould, this hot runner mould is used for the accurately goods of a series of stratification moldings of molding, promptly comprises three layers of mechanograph in an internal layer, an outer and intermediate layer.
Further purpose of the present invention provides a kind of new improved hot runner mould, wherein the hot flow path geat of dual structure can easily be assembled, can link to each other easily with hot flow path at geat, the resin trapping phenomena can not appear, and geat can dismantle easily, so that the inside of cleaning hot flow path body.
Another object of the present invention provides a kind of new improved hot runner mould, this hot runner mould cheap for manufacturing cost, but resin smooth flow, and can distribute more equably from the resin that the cast gate of hot flow path body flows to the hot flow path geat of assembled in pairs.
In order to reach above-mentioned and in the purpose that this does not point out one by one, to the invention provides a kind of hot runner mould, it comprises: two parallel hot flow paths within the hot flow path body; Be connected all paths that are arranged at two runners of desired location in the hot flow path body; Be installed in the adjacent holes and the geat pipe of a tip protrusion arranged or assembly and covers the geat tube end to form the geat lid of dual hot flow path geat.
In above-mentioned hot runner mould, different resins can inject out two runners in the hot flow path body, and these two kinds of resins are introduced into article one resin channels that is interconnected with each runner around the geat pipe and the second resin channels in the geat pipe.The geat of dual structure partly comprises an end and geat parts, the molten resin that flows out from two resin channels can inject die cavity, therefore, even distance from the cast gate of two runners to die cavity, mixing of resin can be do not occurred in the way yet, and several three layers of mechanographs can be obtained by a molded operation.
Now the present invention is described by an embodiment who represents in the accompanying drawing.
Brief description of drawings:
Represented a embodiment in the accompanying drawing according to hot runner mold for three-layer molding of the present invention.
Fig. 1 is vertical positive view of half part of injection molding, and half part of injection molding is shown in chain-dotted line.
Fig. 2 is the side view of above-mentioned situation.
Fig. 3 is the injection molding of three layers of mechanograph molding situation of expression and the partial sectional view of geat end.
In the accompanying drawing, generally have two hot flow paths 2 and 3 with label 1 represented hot flow path body, they one last, one become vertical and parallel to each other setting.Hot flow path 2 meets at right angles with all passages with 3 middle body and links to each other, and hot flow path 2 links to each other with 3a with the cast gate 2a that opens at hot flow path body 1 sidepiece respectively with 3.
In four positions of hot flow path body 1, equidistantly have four holes 4 that are used to form resin channels from upper surface, so that intersect with hot flow path 2 and 3 near base section.
Geat pipe 5 ends are connected with a geat parts 5a, and geat pipe 5 removably is assemblied in each hole 4.Geat pipe 5 comprises the base terminal 5c that diameter equals hole 4 less than the 5b of pipe portion and the diameter in hole 4, and this base terminal 5c has an opening 5d adjacent with hot flow path 3.
From the top of hot flow path body 1 geat pipe 5 is pressed into the appropriate location, opening 5d and hot flow path 3 are aligned, base terminal 5c contacts with the lower surface in hole, thereby between 5b of pipe portion and hole wall, form article one resin channels A that is communicated with hot flow path 2, form the second resin channels B that is communicated with hot flow path 3 in geat pipe 5, the geat parts 5a of geat pipe 5 ends is outstanding from the upper surface of hot flow path body 1.
Therefore, above-mentioned hot runner mould has 4 coaxial geats of giving prominence to from hot flow path body 1 of dual structure.Each all is close these geats with each mould cavity gate of injection molding 7, to obtain several three layers of mechanographs.
Fig. 3 example is separated the molding phase scenario.Two kinds of different resins that inject hot flow path 2,3 from cast gate 2a, the 3a of hot flow path body 1 are by article one and second resin channels A and B, and arrive the end of end 5a and geat cap 6, and they are at first joined at geat mouth 6a place.Then, under the situation that the molten resin from second resin channels B is surrounded by the molten resin from synthetic article one resin channels A, resin injects the die cavity of mold 7, thereby forms three layers of mechanograph 9, forms intermediate layer B from the resin of second resin channels B between ectonexine A.
In this case, can make intermediate layer B biased outward or inboard by different temperature being given injection molding 7 or core 8.
As mentioned above, in according to hot runner mould of the present invention, geat pipe 5 is assemblied in the hole of leaving in the hot flow path body 14, the geat parts 5a of geat pipe 5 is outstanding from the hot flow path body, geat pipe 5 is covered by geat cap 6, form first and second resin channels A and B effectively, and constitute a dual and coaxial hot geat, A and B are communicated with two hot flow paths 2 and 3 in the hot flow path body 1, therefore, can carry out assembly and disassembly to dual geat easily, and, only depend on and insert or remove geat pipe 5 and geat cap 6 just can be cleared up resin channels.In addition, the present invention be advantageous in that: because the negligible amounts of parts, the cost of manufacture of this mould can be lower.And assembling does not need special technique.
Claims (3)
1, a kind ofly is used for the hot runner mould that molding has the molded product of synthetic resin of three layers of composition.
Comprise: a hot flow path body (1), have first and second hot flow paths (3,2) and a plurality of geats hole (4), there is respectively the wall and the import of intersecting with every hot flow path in described geat hole, and described hot flow path body (1) has the cast gate (3a that links to each other with this each bar hot flow path (3,2), 2a), by described cast gate (3a, 2a), resin enters hot flow path body (1); Also have a plurality of geat pipes (5), each geat pipe (5) has longitudinal hole, comprise that one is positioned at a continuous mid portion (5b) of parts (5a) and a base terminal part (5c), in this base terminal part (5c) side opening (5d) that links to each other with above-mentioned first hot flow path (3) is arranged, each geat pipe (5) inserts in the geat hole (4), its base part (5c) is inserted earlier, and geat parts (5a) are partly outstanding from geat hole (4); Also having one first resin channels (A) is by forming between the wall of geat hole (4) and the geat pipe (5), and described passage (A) is connected with a heat passage (2); Other one second resin channels (B) is formed by the longitudinal hole of geat pipe (5), and this passage (B) is connected with a hot flow path (3) by the opening (5d) of the base terminal part (5c) of above-mentioned geat pipe (5); A geat cap (6) removably is located at the mouth mouth in above-mentioned hole (4), covers from the outstanding above-mentioned geat parts (5a) of hot flow path body, the heat flow geat (6a) that has dual structure with formation.
2, hot runner mould according to claim 1 is characterized in that this geat pipe (5) removably is fixed in the geat hole (4), and its bottom part (5c) is fitted in the wall at the bottom of the hole.
3, hot runner mould according to claim 1 is characterized in that the base part (5c) of geat pipe is screwed in the geat hole (4) by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103567 CN1006537B (en) | 1985-05-08 | 1985-05-08 | Hot runner mold for three-layer molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103567 CN1006537B (en) | 1985-05-08 | 1985-05-08 | Hot runner mold for three-layer molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103567A CN85103567A (en) | 1986-11-05 |
| CN1006537B true CN1006537B (en) | 1990-01-24 |
Family
ID=4793284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103567 Expired CN1006537B (en) | 1985-05-08 | 1985-05-08 | Hot runner mold for three-layer molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1006537B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7527490B2 (en) * | 2006-10-13 | 2009-05-05 | Mold-Masters (2007) Limited | Coinjection molding apparatus and related hot-runner nozzle |
| CN105965789B (en) * | 2016-07-11 | 2017-12-29 | 广州华研精密机械有限公司 | A kind of hot runner mould with double-layer channel |
| CN106003570B (en) * | 2016-07-11 | 2018-06-26 | 广州华研精密机械股份有限公司 | A kind of hot runner mould |
-
1985
- 1985-05-08 CN CN 85103567 patent/CN1006537B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85103567A (en) | 1986-11-05 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |