CN105034244A - Thin wall low-pressure injection molding secondary forming mechanism - Google Patents
Thin wall low-pressure injection molding secondary forming mechanism Download PDFInfo
- Publication number
- CN105034244A CN105034244A CN201510475035.5A CN201510475035A CN105034244A CN 105034244 A CN105034244 A CN 105034244A CN 201510475035 A CN201510475035 A CN 201510475035A CN 105034244 A CN105034244 A CN 105034244A
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- CN
- China
- Prior art keywords
- injection molding
- block
- jacking block
- post forming
- pressure injection
- 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.)
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Classifications
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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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
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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
- B29C45/2602—Mould construction elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of mold equipment and provides a thin wall low-pressure injection molding secondary forming mechanism. The thin wall low-pressure injection molding secondary forming mechanism comprises a front mold assembly and a lower mold assembly. The front mold assembly comprises an upper fixing plate, a female mold plate and a hot runner; a valve needle is arranged at the front end of the hot runner; the female mold plate is fixed to the upper fixing plate; the hot runner is arranged inside a female mold. The lower mold assembly comprises a lower fixing plate, a supporting block and a male mold plate, wherein the supporting block is fixed to the lower fixing plate. The lower mold assembly further comprises a secondary forming device located below a male mold core. The thin wall low-pressure injection molding secondary forming mechanism has the advantages that a core of a mold, namely an ejector block adopts the through hole and insert mode, the ejector block can vertically move in the oil cylinder driving mode, and the ejector block moves to drive the thickness of a cavity to change; an oil cylinder is controllable in stroke, so that the thickness of products changes with the controllable wall thickness, the injection molding pressure is low, pressure maintaining is even, internal residual stress of formed products is low, and products deform a little.
Description
Technical field
The invention belongs to die apparatus technical field, relate to a kind of thin-walled low-pressure injection molding post forming mechanism.
Background technology
For some strips or thin wall product, general employing be the mode of many Jiao Kou, product predeformation, the Shooting Technique of high-voltage high-speed, to improve the problem of deformation of products and aspect of performance, but which die cost is high, and predeformation has a big risk, at the bottom of product percent of pass, die life declines, product size is unstable, and qualification rate is low, and local can produce shrink and overlap.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art, and a kind of thin-walled low-pressure injection molding post forming mechanism is provided, by recompressing the function of product after product injection mo(u)lding, shaping rear interiors of products residual stress is low, thus Stress Release is little, deformation of products is little, and in formed product process, technique adjustment scope is large, easily reach high profile tolerance, the requirement of high flatness.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of thin-walled low-pressure injection molding post forming mechanism, comprise front die component and lower mold assemblies, described front die component comprises upper mounted plate, caster and hot flow path, in the front end of hot flow path, needle is set, described caster is fixed on upper mounted plate, hot flow path is arranged in master mold, described lower mold assemblies includes bottom plate, back-up block and male template, described back-up block is fixed on bottom plate, treat that the product of injection moulding is between male template and caster, it is characterized in that, this lower mold assemblies also includes post forming device, under described post forming device is positioned at male die core, material enters mold cavity by hot flow path, injecting glue is stopped after full die cavity to be filled, complete first time filling, hot flow path fuel tap controls, needle close after post forming device moved upward second time forming action.
The measure taked for optimizing such scheme specifically comprises:
In above-mentioned a kind of thin-walled low-pressure injection molding post forming mechanism, described post forming device includes jacking block, oil cylinder, balance weight and limited block, described oil cylinder is positioned at back-up block, described jacking block is connected with oil cylinder, balance weight is positioned on jacking block, and the hydraulic oil cylinder driving jacking block described after completing of first time injecting glue up moves, when moving to limited block cooperation position, limited block just carries out spacing to jacking block movement position, jacking block stop motion.
In above-mentioned a kind of thin-walled low-pressure injection molding post forming mechanism, described balance weight is dismountable bottom being fixed on jacking block.
Compared with prior art, the invention has the advantages that the core of this mould and the mode of jacking block employing through hole mold insert, jacking block adopts the mode of hydraulic oil cylinder driving, can move up and down, and the athletic meeting of jacking block drives the change of die cavity thickness, and oil cylinder is stroke is controlled, thus the thickness of product being formed to the change of controlled wall thickness, injection pressure is little, and pressurize is even, shaping rear interiors of products residual stress is low, and deformation of products is little; In formed product process, technique adjustment scope is large, easily reaches high profile tolerance, the requirement of high flatness, and during low-pressure injection molding, inner pressure uniform distribution, product residue stress is little, and the distortion of product is little, thus can reduce production cost significantly, has good practicality
Accompanying drawing explanation
Fig. 1 is this thin-walled low-pressure injection molding post forming mechanism overall structure schematic diagram.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
In figure, front die component 1; Lower mold assemblies 2; Upper mounted plate 3; Caster 4; Hot flow path 5; Needle 6; Bottom plate 7; Back-up block 8; Male template 9; Product 10; Post forming device 11; Jacking block 12; Oil cylinder 13; Balance weight 14; Limited block 15.
As shown in Figure 1, this thin-walled low-pressure injection molding post forming mechanism, comprise front die component 1 and lower mold assemblies 2, front die component 1 comprises upper mounted plate 3, caster 4 and hot flow path 5, in the front end of hot flow path 5, needle 6 is set, caster 4 is fixed on upper mounted plate 3, hot flow path 5 is arranged in master mold, lower mold assemblies 2 includes bottom plate 7, back-up block 8 and male template 9, back-up block 8 is fixed on bottom plate 7, treat that the product 10 of injection moulding is between male template 9 and caster 4, this lower mold assemblies 2 also includes post forming device 11, under post forming device 11 is positioned at male die core, material enters mold cavity by hot flow path 5, injecting glue is stopped after full die cavity to be filled, complete first time filling, hot flow path 5 fuel tap controls, needle 6 close rear post forming device 11 moved upward second time forming action, post forming device 11 includes jacking block 12, oil cylinder 13, balance weight 14 and limited block 15, oil cylinder 13 is positioned at back-up block 8, jacking block 12 is connected with oil cylinder 13, balance weight 14 is positioned on jacking block 12, the oil cylinder 13 described after completing of first time injecting glue drives jacking block 12 up to move, when moving to limited block 15 cooperation position, limited block 15 just carries out spacing to jacking block 12 movement position, jacking block 12 stop motion, balance weight 14 is dismountable bottom being fixed on jacking block 12, like this can according to the balance weight 14 needing replacing suitable of actual product 10 thickness, also namely balance weight 14 highly can control actual product 10 thickness.
When implementing the technique of this thin-walled low-pressure injection molding post forming mechanism, step is as follows:
The first step: when mill run will change thin-walled low-pressure injection molding into, product 10 needs to do some to be improved, and these improvement can't affect the function of product 10, but can be applicable to the requirement of thin-walled low-pressure injection molding technology;
Second step: carry out CAE software sunykatuib analysis to the product 10 after optimizing, revise product 10 according to analysis result, make the product after optimization 10, its quality and aspect of performance meet the requirements of the customers
3rd step: the key component of this technology is realized by mould inside structure exactly, and material enters mold cavity by the needle 6 of hot flow path 5, stops injecting glue after full die cavity to be filled, complete first time filling, end-of-fill for the first time, controlled by hot flow path 5 fuel tap, needle 6 is closed; Now product 10 meat is thick is that T is (by balance weight 14 height, change T size), because oil cylinder 13 is connected with jacking block 12, after injecting glue completes, oil cylinder 13 drives jacking block 12 up to move, when limited block 15 moves to cooperation position, jacking block 12 stop motion, jacking block 12 move distance L=product original depth T-product final thickness T ', after product 10 thinning action completes, unnecessary defective material can be overflowed by flash groove, mould die sinking completes shaping;
4th step: after Mould Machining manufacture completes, process conditions when project team technologist simulates according to CAE, carry out injection moulding checking, during according to injection mo(u)lding, actual defect, the technological parameter of injection moulding is revised, numerical value will be repaiied file, as the reference of follow-up like product 10, also to carry out three coordinate <CMM> to the product 10 of range estimation OK to detect, according to the defect in the testing result of trial product 10 first, mould is rectified and improved, product 10 after rectification is be sure of again, detect through three coordinates (CMM), second time trial product 10 meets customer demand substantially.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from the scope that spirit of the present invention defines.
Claims (3)
1. a thin-walled low-pressure injection molding post forming mechanism, comprise front die component and lower mold assemblies, described front die component comprises upper mounted plate, caster and hot flow path, in the front end of hot flow path, needle is set, described caster is fixed on upper mounted plate, hot flow path is arranged in master mold, described lower mold assemblies includes bottom plate, back-up block and male template, described back-up block is fixed on bottom plate, treat that the product of injection moulding is between male template and caster, it is characterized in that, this lower mold assemblies also includes post forming device, under described post forming device is positioned at male die core, material enters mold cavity by hot flow path, injecting glue is stopped after full die cavity to be filled, complete first time filling, hot flow path fuel tap controls, needle close after post forming device moved upward second time forming action.
2. a kind of thin-walled low-pressure injection molding post forming mechanism according to claim 1, it is characterized in that, described post forming device includes jacking block, oil cylinder, balance weight and limited block, described oil cylinder is positioned at back-up block, and described jacking block is connected with oil cylinder, and balance weight is positioned on jacking block, the hydraulic oil cylinder driving jacking block described after completing of first time injecting glue up moves, when moving to limited block cooperation position, limited block just carries out spacing to jacking block movement position, jacking block stop motion.
3. a kind of thin-walled low-pressure injection molding post forming mechanism according to claim 2, it is characterized in that, described balance weight is dismountable bottom being fixed on jacking block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475035.5A CN105034244A (en) | 2015-08-05 | 2015-08-05 | Thin wall low-pressure injection molding secondary forming mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475035.5A CN105034244A (en) | 2015-08-05 | 2015-08-05 | Thin wall low-pressure injection molding secondary forming mechanism |
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| Publication Number | Publication Date |
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| CN105034244A true CN105034244A (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510475035.5A Pending CN105034244A (en) | 2015-08-05 | 2015-08-05 | Thin wall low-pressure injection molding secondary forming mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489903A (en) * | 2019-01-08 | 2019-03-19 | 宁波朗迪叶轮机械有限公司 | A kind of automatic balancing machine and its balance weight production and assemble mechanism, dynamic balancing compensation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314253A (en) * | 2008-05-06 | 2008-12-03 | 许南旭 | Heat flow path apparatus for injection molding |
| CN201669862U (en) * | 2010-05-07 | 2010-12-15 | 嘉兴信元精密模具科技有限公司 | Intramode compression device of injection mold |
| CN202318763U (en) * | 2011-11-16 | 2012-07-11 | 滁州市科铭模塑制品有限公司 | Injection mold with sticking film at inner part |
| CN202448302U (en) * | 2012-01-31 | 2012-09-26 | 大连多利电器用品有限公司 | Thin-wall part forming die |
| CN204955262U (en) * | 2015-08-05 | 2016-01-13 | 嘉兴信元精密模具科技有限公司 | Thin wall low pressure secondary forming mechanism that moulds plastics |
-
2015
- 2015-08-05 CN CN201510475035.5A patent/CN105034244A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314253A (en) * | 2008-05-06 | 2008-12-03 | 许南旭 | Heat flow path apparatus for injection molding |
| CN201669862U (en) * | 2010-05-07 | 2010-12-15 | 嘉兴信元精密模具科技有限公司 | Intramode compression device of injection mold |
| CN202318763U (en) * | 2011-11-16 | 2012-07-11 | 滁州市科铭模塑制品有限公司 | Injection mold with sticking film at inner part |
| CN202448302U (en) * | 2012-01-31 | 2012-09-26 | 大连多利电器用品有限公司 | Thin-wall part forming die |
| CN204955262U (en) * | 2015-08-05 | 2016-01-13 | 嘉兴信元精密模具科技有限公司 | Thin wall low pressure secondary forming mechanism that moulds plastics |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489903A (en) * | 2019-01-08 | 2019-03-19 | 宁波朗迪叶轮机械有限公司 | A kind of automatic balancing machine and its balance weight production and assemble mechanism, dynamic balancing compensation method |
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Application publication date: 20151111 |