CN104441488A - Predeformation method and system of unequal-wall-thickness plastic part mold parting surface - Google Patents
Predeformation method and system of unequal-wall-thickness plastic part mold parting surface Download PDFInfo
- Publication number
- CN104441488A CN104441488A CN201410817550.2A CN201410817550A CN104441488A CN 104441488 A CN104441488 A CN 104441488A CN 201410817550 A CN201410817550 A CN 201410817550A CN 104441488 A CN104441488 A CN 104441488A
- Authority
- CN
- China
- Prior art keywords
- predeformation
- cavity
- plastic part
- wall thickness
- deformation
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 238000001746 injection moulding Methods 0.000 claims description 31
- 238000004088 simulation Methods 0.000 claims description 5
- 238000009795 derivation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 30
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 3
- 238000012938 design process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005094 computer simulation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3835—Designing moulds, e.g. using CAD-CAM
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2725—Manifolds
-
- 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
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a predeformation method of an unequal-wall-thickness plastic part mold parting surface. The predeformation method comprises the following steps: simulating an original three-dimensional model, dividing the original three-dimensional model, a gating system and a cooling system into grid cells composed of a plurality of nodes, analyzing the deformation of the nodes of the grid cells to obtain the deformation displacement values of each node in positive and negative axes in the directions X, Y and Z and displacement information of the node, and further to obtain a predeformation; overlaying a reversed predeformation in the original three-dimensional model of a product so as to compensate the buckling deformation of the product in the cooling process with the predeformation; and after determining the predeformation, reconstructing a predeformation model, so that an injection mold with a predeformation cavity is obtained according to the predeformation model. The predeformation method of the unequal-wall-thickness plastic part mold parting surface is capable of controlling the deformation of a plastic product within a tolerance range; besides, the design period is shortened and the efficiency is improved.
Description
Technical field
The present invention relates to injection molding distortion field, particularly relate to one and do not wait wall thickness plastic part mould die joint predeformation method and system thereof.
Background technology
The most traditional technological parameter of injection molding is determined, is find the unreasonable of injection technique by the actual buckling deformation situation of plastic products, thus reduces the buckling deformation of plastic products by optimizing injection technique.Due to the complexity day by day of plastic products structure, just need fastidious a large amount of injection technological parameter just can find the factor affecting goods buckling deformation, therefore, workload is too large, consuming time oversize, and through die trial repeatedly and will repair a die, cost is higher, so only from relying on the actual performance of a large amount of injection molding to carry out Optimizing Process Parameters thus the buckling deformation solving goods is unpractical.Traditional design and the technological parameter of employing do not adopt and compensate distressed structure and effectively reduce the deflection of plastic in forming process.The parting surface structure of mould does not consider the preset anti-deformation structure of plastic member product model.The cycle of Design of Dies and die trial, maintenance is long. and cost is high.After injection moulding, the percent defective of goods is high, and loss is large.When not waiting wall thickness more than 2.5 times for goods, the mould of traditional design cannot produce qualified goods, reduces the adaptability of enterprise to market.
Summary of the invention
Based on this, after being necessary to provide one that plastic products are out of shape in process of injection molding, its deformation amount controlling in the margin of tolerance, and shortens the design cycle, and that greatly raises the efficiency does not wait wall thickness plastic part mould die joint predeformation method.
One does not wait wall thickness plastic part mould die joint predeformation method, comprises the steps:
Simulation original three-dimensional model, original three-dimensional model, running gate system and cooling system are divided into the grid cell of several nodes composition, after analyzing the column joints deformation of grid cell, each node is along the displacement information of the deformation displacement value on X, Y, the positive and negative axle of Z-direction and this node, obtains a predeformation amount;
The described predeformation amount that superposition one is reverse in the original three-dimensional model of goods, make can compensate this predeformation amount when buckling deformation occurs goods in cooling procedure, after determining predeformation amount, rebuild predeformation model, draw the injection molding with predeformation cavity according to predeformation model.
Wherein in an embodiment, described original three-dimensional model passes through software simulation.
Wherein in an embodiment, goods original three-dimensional model, running gate system and cooling system are all divided into by Moldflow software analysis the grid cell be made up of several nodes.
Wherein in an embodiment, Moldflow software is derived the nodal information of grid cell and is formed message file and buckling deformation file, the message file of deriving comprises the original coordinates value of grid node, and after the buckling deformation file of derivation comprises grid cell column joints deformation, each node is along the deformation displacement value on X, Y, the positive and negative axle of Z-direction and this modal displacement information.
Wherein in an embodiment, described modal displacement information comprises global displacement information or local displacement information.
Wherein in an embodiment, described modal displacement information also comprises the node number of each node.
Another object of the present invention is also to provide one not wait wall thickness plastic part mould die joint predeformation system.
One does not wait wall thickness plastic part mould die joint predeformation system, and comprise injection molding, running gate system and cooling system, described injection molding has predeformation cavity;
Described running gate system has sprue, runner and cast gate, and described cast gate is positioned at the end of runner, and described cast gate is communicated in described predeformation cavity, and described runner is communicated in described sprue;
Described cooling system has cooling pipe, and described cooling pipe is positioned at the bottom of described predeformation cavity.
Wherein in an embodiment, described injection molding has multiple predeformation cavity, described predeformation cavity is uniformly distributed, described sprue is positioned at the center of multiple predeformation cavity, the quantity of described cast gate and the quantity of runner are all equal with described predeformation number of cavities, and runner described in each is communicated in corresponding predeformation cavity by corresponding cast gate.
Wherein in an embodiment, described cooling system has at least two group cooling pipes, and cooling pipe described in two groups lays respectively at top and the below of described predeformation cavity;
The top of described predeformation cavity and the cooling pipe of below sequentially pass through each predeformation cavity all successively.
Wherein in an embodiment, the cross section of described sprue is rounded, and the diameter of described sprue is 7mm, and the cross section of described cooling pipe is rounded, and the diameter of described cooling pipe is 10mm.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation method, improves the buckling deformation amount after plastic product forming by the situation such as size, layout of research running gate system and cooling system.Numerical value and direction is out of shape after drawing goods injection moulding by experiment, predeformation model is rebuild by distortion numerical value and deformation direction, the threedimensional model of the pre-resistance to deformation amount added obtains compensation rate at mold parting surface, thus after making plastic products be out of shape in process of injection molding, its deformation amount controlling is in the margin of tolerance.
In plastic products Injection Molded Parts at Cooling Stage, different with stress orientation because shrinking, the problem of buckling deformation occurs after causing product molding, and deformation precompensation method effectively can improve this deformation of product.The method of deformation precompensation adds a reverse predeformation amount at original threedimensional model, can compensate this predeformation amount, make the product after distortion meet tolerance when buckling deformation occurs plastic products in cooling procedure.Rebuild CAD predeformation model after determining deflection, then design predeformation die cavity, predeformation die cavity region can compensate the deformed region of goods, thus improves the precision of product.And the method shortens the design cycle of mould, greatly raises the efficiency.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation system, have employed the design of singly entering cast gate, adopt the structural design of a multi-cavity mold, the mould of this structure, the design of running gate system will ensure that plastic solution can be full of all die cavities, and in running gate system, each runner is identical with the shape and size of cast gate, running gate system also should be designed to the form of balanced type, can ensure that the flow of each cast gate and process conditions reach consistent so simultaneously, boost productivity, reduce production cost.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation system, and described cooling system has at least two group cooling pipes, and cooling pipe described in two groups lays respectively at top and the below of described predeformation cavity.The top of described predeformation cavity and the cooling pipe of below sequentially pass through each predeformation cavity all successively.The layout principles of cooling pipe be to avoid mould cold spot, avoid the larger region of plastic solution flow resistance, avoid region that thin, heavy wall connects, cooling pipe is strengthened in the thicker and region of dispelling the heat insufficient at mold wall thickness layout, make heat radiation evenly, be convenient to the heat radiation in the thicker region of goods.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation system, decreases the buckling deformation amount of plastic products in process of injection molding, thus reduces the percent defective of product, improve economic benefit.Shorten design cycle and the manufacturing cycle of mould, reduce design and manufaction cost.Overcome mould die trial repeatedly, repair a die on the impact of producing, greatly reduce the cost of Making mold and maintenance.Solve because of plastic products wall thickness do not wait, uneven and buckling deformation amount that is that produces is excessive and be difficult to the practical problem of production.Be suitable for that wall thickness does not wait, uneven scope is wide.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention injection molding schematic diagram;
Fig. 2 is embodiment of the present invention injection molding and running gate system schematic diagram;
Fig. 3 is that the embodiment of the present invention does not wait wall thickness plastic part mould die joint predeformation system schematic top plan view;
Fig. 4 is that the embodiment of the present invention does not wait wall thickness plastic part mould die joint predeformation system elevational schematic view;
Fig. 5 is that the embodiment of the present invention does not wait the deformation fuel factor schematic diagram of thick product when injection moulding;
Fig. 6 is that the embodiment of the present invention does not wait the deformation side view of thick product when injection moulding;
Fig. 7 is that the embodiment of the present invention does not wait the article model of thick product after precompensation deflection.
Description of reference numerals
100, injection molding; 101, predeformation cavity; 102, groove; 200, sprue; 201, arm is poured into a mould; 300, cooling pipe; 400, goods.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein "and/or" comprises arbitrary and all combinations of one or more relevant Listed Items.
Do not wait wall thickness plastic because of wall unevenness even, in the process of cooling, shrinkage stress is uneven and buckling deformation phenomenon occurs after causing product molding.Present embodiments provide one and do not wait wall thickness plastic part mould die joint predeformation method, comprise the steps:
Original three-dimensional model, running gate system and cooling system are all divided into by Moldflow software analysis the grid cell be made up of several nodes, by the original three-dimensional model of software simulation goods 400, after the column joints deformation of software analysis grid cell, each node is along the displacement of the deformation displacement value on X, Y, the positive and negative axle of Z-direction and this node, obtains buckling deformation file; By Moldflow software, the nodal information of grid cell is derived formation message file and buckling deformation file in the present embodiment, the message file of deriving comprises the original coordinates value of grid node, and after the buckling deformation file of derivation comprises grid cell column joints deformation, each node is along the deformation displacement value on X, Y, the positive and negative axle of Z-direction and this modal displacement information; Described modal displacement information comprises global displacement information or local displacement information, and described modal displacement information also comprises the node number of each node.
By buckling deformation file by computer simulation or obtain a predeformation amount (shown in Fig. 5 and Fig. 6) from the shaping production of reality, this reverse predeformation amount is added in the original three-dimensional model of goods 400, make can compensate this predeformation amount when buckling deformation occurs goods 400 in cooling procedure, after determining predeformation amount, rebuild predeformation model (shown in Figure 7), go out to have the injection molding 100 of predeformation cavity 101 according to predeformation modelling.
The embodiment of the present invention additionally provides one and does not wait wall thickness plastic part mould die joint predeformation system.
One does not wait wall thickness plastic part mould die joint predeformation system, shown in Fig. 1-Fig. 5, comprise injection molding 100, running gate system and cooling system, described injection molding 100 is square, described injection molding 100 has 4 predeformation cavitys 101,4 predeformation cavitys 101 are uniformly distributed in 2 row * 2 row, the predeterminated position of described predeformation cavity 101 has groove 102, the position in the position of groove 102 and the thicker region of plastic products 400, the outstanding thickness of the degree of depth of groove 102 and the thicker region of plastic products 400;
Described running gate system has sprue 200, described running gate system has the runner 201 equal with described predeformation cavity 101 quantity, the end of each runner 201 has cast gate, the described runner 201 that waters is communicated in corresponding predeformation cavity 101 by the cast gate of its end, and the other end parallel communication of runner 201 is in sprue 200.Described predeformation cavity 101 is uniformly distributed, and described sprue 200 is positioned at middle part, and described runner 201 is uniformly distributed in sprue 200 around.
Further, in the present embodiment, described running gate system has 2 runners 201 and four cast gates, two ends of each runner 201 have cast gate, one of them runner 201 and corresponding two cast gates distribution are between two predeformation cavitys 101 of same row, 2 runners are parallel with cast gate 201, the cast gate (port) of each runner 201 is communicated in predeformation cavity 101 corresponding to two of same row and respectively toward groove 102 place of described predeformation cavity 101, the middle part of 2 runners 201 is communicated in described sprue 200, 2 runners 201 and sprue 200 form H type, the middle part of sprue 200 has opening for material feeding.
Described cooling system has cooling pipe 300 described in two groups of cooling pipes 300, two groups and lays respectively at top and the below of the groove 102 of described predeformation cavity 101.The top of the groove 102 of described predeformation cavity 101 and the cooling pipe 300 of below sequentially pass through groove 102 place of each predeformation cavity 101 all successively.The water inlet thermal creep stress of described cooling pipe 300 is 20 DEG C, and the cooling Reynolds number of described cooling pipe 300 is 6000.
The cross section of described sprue 200 is rounded, and the diameter of described sprue 200 is 7mm.The cross section of described cooling pipe 300 is rounded, and the diameter of described cooling pipe 300 is 10mm.The lateral separation at injection molding 100 center, position, sprue gate is 90mm.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation method, the running gate system of Moldflow software to the threedimensional model of goods is adopted to analyze, can by the analysis result of Moldflow software, analyze the position of cast gate, size, the size of sprue and runner, whether the parameter such as shape and distribution situation is reasonable, the design of this application Moldflow software, compensate for designer to a great extent to lack experience and error in the design caused, designer can carry out CAE sunykatuib analysis with article model at die design process, ensure that designer just finds that whether the design of running gate system is reasonable in the design process, at utmost ensure that mould finds the shortcoming in design before producing.
In order to boost productivity, reduce production cost, designer often adopts the structural design of a multi-cavity mold, the mould of this structure, the design of running gate system will ensure that plastic solution can be full of all die cavities, in order to meet this requirement, except requiring in running gate system that each runner is identical with the shape and size of cast gate, running gate system also should be designed to the form of balanced type, can ensure that the flow at each sprue gate and process conditions reach consistent simultaneously like this.Can be analyzed from above-mentioned: cooling velocity is except outside the Pass having with the flow of cooling pipe and the size of cooling pipe diameter, and the buckling deformation that the layout of cooling pipe is right also has a certain impact.The present invention does not wait the feature of wall thickness plastic part mould die joint predeformation system to be that wall unevenness is even; the wall thickness difference 2.3mm between thin-walled and heavy wall, according to matter heat transfer figure: the layout principles of cooling pipe be to avoid mould cold spot, avoid the larger region of plastic solution flow resistance, avoid region that thin, heavy wall connects, cooling pipe is strengthened in the thicker and region of dispelling the heat insufficient at mold wall thickness layout.Can obtain through above-mentioned analysis, after the optimization of cooling system, the buckling deformation maximum deformation quantity of these goods reduces to some extent, reduced although buckling deformation amount is existing, but goods still do not control in the margin of tolerance, so the buckling deformation improving goods of only starting with from the aspect of optimized cooling system still can not meet the demands.
The present invention improves the buckling deformation situation of goods by predeformation method, predeformation method is by learning that the buckling deformation amount of goods is come to the reverse predeformation amount of article made to order, and the deflection of the coordinate and node all directions that therefore obtain goods grid cell node is bases that predeformation CAD rebuilds.
Moldflow software is all divided into grid cell the original three-dimensional model of goods, running gate system and cooling system, and these grid cells are all made up of several nodes.The principle of Moldflow software analysis goods buckling deformation is, the nodal information of grid cell is derived in the PatranFile order of software, the message file of deriving comprises the original coordinates value of grid node, deformation displacement value after the buckling deformation file of deriving comprises grid cell column joints deformation in each nodes X, Y, Z-direction on positive and negative axle and this node belong to the information such as global displacement or local displacement, also comprise the node number of each node.
In plastic products Injection Molded Parts at Cooling Stage, different with stress orientation because shrinking, the problem of buckling deformation occurs after causing product molding, and deformation precompensation method effectively can improve this deformation of product.The method of deformation precompensation adds a reverse predeformation amount at original threedimensional model, can compensate this predeformation amount, make the product after distortion meet tolerance when buckling deformation occurs plastic products in cooling procedure.CAD predeformation model is rebuild after determining deflection, then predeformation die cavity is designed, predeformation die cavity region can compensate the deformed region of goods, thus improves the precision of product, and the deflection of precompensation can by computer simulation out or obtain from the shaping production of reality.
After Moldflow software completes original threedimensional model injection molding simulation, designer can analyze the situation that buckling deformation occurs when injection moulding goods, numerical value according to simulating the deformed region drawn compares with initial three-dimensional article model, determines direction and the numerical value of plastic products buckling deformation in forming process.The predeformation of this problem compensate to as if original three-dimensional article model, the threedimensional model that application predeformation is rebuild carries out Design of Dies, thus can converse for the deflection of deformed region on original mold cavity.
Threedimensional model original for goods is divided into grid cell by Moldflow software, predeformation compensate to as if original grid cell node.After the analysis of Moldflow Software Numerical Simulation completes, read the buckling deformation situation of goods grid cell node, the result of simulation value includes node number, nodes X, Y, deformation displacement in Z tri-reference axis and deformation direction, by comparing the deformation of original three-dimensional model and grid cell node, obtain the deformed region of original three-dimensional model, converse for the deflection of deformed region on original threedimensional model, then carry out Design of Dies with the threedimensional model after converse, namely equal to have arrived on mold cavity converse for the deflection of deformed region.In actual production process, owing to being subject to the impact of production environment, the shrinkage factor of each node of threedimensional model is different, if the shrinkage factor of each node will be considered, like this cause very large difficulty to Design of Dies, not only add the design cost of mould, and lengthen the Design and manufacture cycle of mould, therefore in the design process of reality, unified to goods shrinkage factor, can have some impact to the precision of model although it is so, but its precision can control in the margin of tolerance.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation method, improves the buckling deformation amount after plastic product forming by the situation such as size, layout of research running gate system and cooling system.Numerical value and direction is out of shape after drawing goods injection moulding by experiment, predeformation model is rebuild by distortion numerical value and deformation direction, the threedimensional model of the pre-resistance to deformation amount added obtains compensation rate at mold parting surface, thus after making plastic products be out of shape in process of injection molding, its deformation amount controlling is in the margin of tolerance.
In plastic products Injection Molded Parts at Cooling Stage, different with stress orientation because shrinking, the problem of buckling deformation occurs after causing product molding, and deformation precompensation method effectively can improve this deformation of product.The method of deformation precompensation adds a reverse predeformation amount at original threedimensional model, can compensate this predeformation amount, make the product after distortion meet tolerance when buckling deformation occurs plastic products in cooling procedure.Rebuild CAD predeformation model after determining deflection, then design predeformation die cavity, predeformation die cavity region can compensate the deformed region of goods, thus improves the precision of product.And the method shortens the design cycle of mould, greatly raises the efficiency.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation system, have employed the design of singly entering cast gate, adopt the structural design of a multi-cavity mold, the mould of this structure, the design of running gate system will ensure that plastic solution can be full of all die cavities, and in running gate system, each runner is identical with the shape and size of cast gate, running gate system also should be designed to the form of balanced type, can ensure that the flow of each cast gate and process conditions reach consistent so simultaneously, boost productivity, reduce production cost.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation system, and described cooling system has two groups of cooling pipes, and cooling pipe described in two groups lays respectively at top and the below of the groove of described predeformation cavity.The top of the groove of described predeformation cavity and the cooling pipe of below sequentially pass through the groove of each predeformation cavity all successively.The layout principles of cooling pipe be to avoid mould cold spot, avoid the larger region of plastic solution flow resistance, avoid region that thin, heavy wall connects, cooling pipe is strengthened in the thicker and region of dispelling the heat insufficient at mold wall thickness layout, make heat radiation evenly, be convenient to the heat radiation in the thicker region of goods.
What the present invention relates to does not wait wall thickness plastic part mould die joint predeformation system, decreases the buckling deformation amount of plastic products in process of injection molding, thus reduces the percent defective of product, improve economic benefit.Shorten design cycle and the manufacturing cycle of mould, reduce design and manufaction cost.Overcome mould die trial repeatedly, repair a die on the impact of producing, greatly reduce the cost of Making mold and maintenance.Solve because of plastic products wall thickness do not wait, uneven and buckling deformation amount that is that produces is excessive and be difficult to the practical problem of production.Be suitable for that wall thickness does not wait, uneven scope is wide.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. do not wait a wall thickness plastic part mould die joint predeformation method, it is characterized in that, comprise the steps:
Simulation original three-dimensional model, original three-dimensional model, running gate system and cooling system are divided into the grid cell of several nodes composition, after analyzing the column joints deformation of grid cell, each node is along the displacement information of the deformation displacement value on X, Y, the positive and negative axle of Z-direction and this node, obtains a predeformation amount;
The described predeformation amount that superposition one is reverse in the original three-dimensional model of goods, make can compensate this predeformation amount when buckling deformation occurs goods in cooling procedure, after determining predeformation amount, rebuild predeformation model, draw the injection molding with predeformation cavity according to predeformation model.
2. method such as predeformation such as die joint such as plastic part mould such as wall thickness such as grade according to claim 1, it is characterized in that, described original three-dimensional model passes through software simulation.
3. method such as predeformation such as die joint such as plastic part mould such as wall thickness such as grade according to claim 1, it is characterized in that, goods original three-dimensional model, running gate system and cooling system are all divided into by Moldflow software analysis the grid cell be made up of several nodes.
4. method such as predeformation such as die joint such as plastic part mould such as wall thickness such as grade according to claim 3, it is characterized in that, Moldflow software is derived the nodal information of grid cell and is formed message file and buckling deformation file, the message file of deriving comprises the original coordinates value of grid node, and after the buckling deformation file of derivation comprises grid cell column joints deformation, each node is along the deformation displacement value on X, Y, the positive and negative axle of Z-direction and this modal displacement information.
5. method such as predeformation such as die joint such as plastic part mould such as wall thickness such as grade according to claim 4, it is characterized in that, described modal displacement information comprises global displacement information or local displacement information.
6. method such as predeformation such as die joint such as plastic part mould such as wall thickness such as grade according to claim 5, it is characterized in that, described modal displacement information also comprises the node number of each node.
7. do not wait a wall thickness plastic part mould die joint predeformation system, it is characterized in that, comprise injection molding, running gate system and cooling system, described injection molding has predeformation cavity;
Described running gate system has sprue, runner and cast gate, and described cast gate is positioned at the end of runner, and described cast gate is communicated in described predeformation cavity, and described runner is communicated in described sprue;
Described cooling system has cooling pipe, and described cooling pipe is positioned at the bottom of described predeformation cavity.
8. system such as predeformation such as die joint such as plastic part mould such as wall thickness such as grade according to claim 7, it is characterized in that, described injection molding has multiple predeformation cavity, described predeformation cavity is uniformly distributed, described sprue is positioned at the center of multiple predeformation cavity, the quantity of described cast gate and the quantity of runner are all equal with described predeformation number of cavities, and runner described in each is communicated in corresponding predeformation cavity by corresponding cast gate.
9. the system such as predeformation such as die joint such as plastic part mould such as wall thickness such as not grade according to claim 7 or 8, it is characterized in that, described cooling system has at least two group cooling pipes, and cooling pipe described in two groups lays respectively at top and the below of described predeformation cavity;
The top of described predeformation cavity and the cooling pipe of below sequentially pass through each predeformation cavity all successively.
10. the system such as predeformation such as die joint such as plastic part mould such as wall thickness such as not grade according to claim 7 or 8, it is characterized in that, the cross section of described sprue is rounded, and the diameter of described sprue is 7mm, the cross section of described cooling pipe is rounded, and the diameter of described cooling pipe is 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817550.2A CN104441488A (en) | 2014-12-23 | 2014-12-23 | Predeformation method and system of unequal-wall-thickness plastic part mold parting surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817550.2A CN104441488A (en) | 2014-12-23 | 2014-12-23 | Predeformation method and system of unequal-wall-thickness plastic part mold parting surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104441488A true CN104441488A (en) | 2015-03-25 |
Family
ID=52888613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410817550.2A Pending CN104441488A (en) | 2014-12-23 | 2014-12-23 | Predeformation method and system of unequal-wall-thickness plastic part mold parting surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104441488A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105599185A (en) * | 2016-03-11 | 2016-05-25 | 武汉华星光电技术有限公司 | Manufacturing method of light guide plate mold |
| CN105690650A (en) * | 2016-03-11 | 2016-06-22 | 佛山市顺德区百年科技有限公司 | Injection molding method of product |
| CN108595866A (en) * | 2018-05-02 | 2018-09-28 | 广东工业大学 | A kind of optical element mold cavity design method and device |
| CN108890982A (en) * | 2018-07-26 | 2018-11-27 | 骏伟塑胶制品（太仓）有限公司 | A kind of injection molding plastic cement products counter-bonification production technology |
| CN109334045A (en) * | 2018-11-16 | 2019-02-15 | 航天特种材料及工艺技术研究所 | A kind of cavity body structure and preparation method thereof |
| CN110315741A (en) * | 2019-06-27 | 2019-10-11 | 上海乔治费歇尔亚大塑料管件制品有限公司 | The method of sectional type amendment PE pipe fitting ovality |
| CN111086132A (en) * | 2019-12-30 | 2020-05-01 | 天津银宝山新科技有限公司 | Plastic grid pre-deformation mold design method |
| CN113021816A (en) * | 2021-03-04 | 2021-06-25 | 上海泰客诺信息科技有限公司 | Method and system for improving anti-deformation accuracy of injection molding product |
| WO2021134247A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Diaphragm forming mold |
| CN113799316A (en) * | 2020-06-17 | 2021-12-17 | 五行科技股份有限公司 | Method for manufacturing composite board |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188441A (en) * | 1996-04-11 | 1998-07-22 | 花王株式会社 | Mold designing method and apparatus |
| JP2001076015A (en) * | 1999-09-03 | 2001-03-23 | Canon Inc | Device and method for designing mold and storage medium |
| JP2001101246A (en) * | 1999-09-29 | 2001-04-13 | Canon Inc | Three-dimensional mold designing device, thrre- dimensional mold designing method and storage medium |
| CN101544037A (en) * | 2008-03-28 | 2009-09-30 | 佛山普立华科技有限公司 | Lens shaping mould |
-
2014
- 2014-12-23 CN CN201410817550.2A patent/CN104441488A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188441A (en) * | 1996-04-11 | 1998-07-22 | 花王株式会社 | Mold designing method and apparatus |
| JP2001076015A (en) * | 1999-09-03 | 2001-03-23 | Canon Inc | Device and method for designing mold and storage medium |
| JP2001101246A (en) * | 1999-09-29 | 2001-04-13 | Canon Inc | Three-dimensional mold designing device, thrre- dimensional mold designing method and storage medium |
| CN101544037A (en) * | 2008-03-28 | 2009-09-30 | 佛山普立华科技有限公司 | Lens shaping mould |
Non-Patent Citations (3)
| Title |
|---|
| 刘琼: "《塑料注射Moldflow实用教程》", 31 October 2008, 机械工业出版社 * |
| 徐佩弦: "《塑料注射成型与模具设计指南》", 30 September 2013, 机械工业出版社 * |
| 李代叙: "《Moldflow模流分析从入门到精通》", 31 May 2012, 清华大学出版社 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105690650A (en) * | 2016-03-11 | 2016-06-22 | 佛山市顺德区百年科技有限公司 | Injection molding method of product |
| US20170261681A1 (en) * | 2016-03-11 | 2017-09-14 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Method for manufacturing light guide plate mold |
| CN105599185B (en) * | 2016-03-11 | 2018-06-29 | 武汉华星光电技术有限公司 | A kind of manufacturing method of light-conducting board mold |
| US10222538B2 (en) * | 2016-03-11 | 2019-03-05 | Wuhan China Star Optoelectronics Technology Co., Ltd | Method for manufacturing light guide plate mold |
| CN105599185A (en) * | 2016-03-11 | 2016-05-25 | 武汉华星光电技术有限公司 | Manufacturing method of light guide plate mold |
| CN108595866A (en) * | 2018-05-02 | 2018-09-28 | 广东工业大学 | A kind of optical element mold cavity design method and device |
| CN108890982A (en) * | 2018-07-26 | 2018-11-27 | 骏伟塑胶制品（太仓）有限公司 | A kind of injection molding plastic cement products counter-bonification production technology |
| CN109334045B (en) * | 2018-11-16 | 2020-11-13 | 航天特种材料及工艺技术研究所 | Cavity structure and preparation method thereof |
| CN109334045A (en) * | 2018-11-16 | 2019-02-15 | 航天特种材料及工艺技术研究所 | A kind of cavity body structure and preparation method thereof |
| CN110315741A (en) * | 2019-06-27 | 2019-10-11 | 上海乔治费歇尔亚大塑料管件制品有限公司 | The method of sectional type amendment PE pipe fitting ovality |
| CN113147008A (en) * | 2019-06-27 | 2021-07-23 | 上海乔治费歇尔亚大塑料管件制品有限公司 | Method for correcting ovality of PE pipe fitting |
| CN111086132A (en) * | 2019-12-30 | 2020-05-01 | 天津银宝山新科技有限公司 | Plastic grid pre-deformation mold design method |
| WO2021134247A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Diaphragm forming mold |
| CN111086132B (en) * | 2019-12-30 | 2022-04-12 | 天津银宝山新科技有限公司 | Plastic grid pre-deformation mold design method |
| CN113799316A (en) * | 2020-06-17 | 2021-12-17 | 五行科技股份有限公司 | Method for manufacturing composite board |
| CN113021816A (en) * | 2021-03-04 | 2021-06-25 | 上海泰客诺信息科技有限公司 | Method and system for improving anti-deformation accuracy of injection molding product |
| CN113021816B (en) * | 2021-03-04 | 2023-03-07 | 上海泰客诺信息科技有限公司 | Method and system for improving anti-deformation accuracy of injection molding product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104441488A (en) | Predeformation method and system of unequal-wall-thickness plastic part mold parting surface | |
| Matin et al. | A CAD/CAE-integrated injection mold design system for plastic products | |
| CN106346705A (en) | 3D (three-dimension) printing module and manufacturing method thereof | |
| CN111177906B (en) | Method for accurately compensating discrete die profile | |
| CN103699718A (en) | Predeformation design method of plastic injection product | |
| CN108228925A (en) | A kind of method for numerical simulation of complex shapes extrusion process | |
| CN108407222A (en) | A kind of water route containing conformal cooling mold cores mold insert | |
| Wei et al. | Review of conformal cooling system design and additive manufacturing for injection molds | |
| CN110076974A (en) | The design method of injection mold conformal cooling channel based on increases material manufacturing technology | |
| Kariminejad et al. | Comparison of conventional and conformal cooling channels in the production of a commercial injection-moulded component | |
| CN104657565A (en) | Method for designing hot-working die of close-profile water channel | |
| CN104999083A (en) | Preparation method of sloped top of heteromorphic waterway and sloped top | |
| CN113158483A (en) | Wax mold injection process parameter determination method based on injection molding numerical simulation | |
| CN205929373U (en) | Sub - forming die cooling device of plastic insulation | |
| CN109002581A (en) | High temperature alloy non-standard fastener Plastic Forming Reverse Design based on emulation | |
| Cao et al. | Design of an automobile injection mould based on automation technology | |
| CN209176057U (en) | A kind of injection mold of automobile instrument dial | |
| CN203110286U (en) | Insert structure of special mold core for water line to pass | |
| Jain et al. | Plastic injection molding with taguchi approach-a review | |
| CN202137911U (en) | Runner structure for multiple cavities | |
| CN210910938U (en) | Injection mold of quick manufacturing | |
| Huang | The Optimal Design of Injection Mold Cooling System | |
| CN204398265U (en) | A kind of water tank cross beam cushion pad mould special for mfg | |
| Chen et al. | Experimental investigation into suitable process conditions for plastic injection molding of thin-sheet parts | |
| Gu et al. | Research on intelligent control of thin-walled plastic parts forming quality based on CAE and DOE technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
|
| RJ01 | Rejection of invention patent application after publication |