CN103640152A - Mud guard mold and injection molding process thereof - Google Patents
Mud guard mold and injection molding process thereof Download PDFInfo
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- CN103640152A CN103640152A CN201310569328.0A CN201310569328A CN103640152A CN 103640152 A CN103640152 A CN 103640152A CN 201310569328 A CN201310569328 A CN 201310569328A CN 103640152 A CN103640152 A CN 103640152A
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- 238000001746 injection moulding Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 19
- 229920003023 plastic Polymers 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 18
- 230000004907 flux Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000007423 decrease Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 19
- 239000007924 injection Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 238000009966 trimming Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
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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
- B29C2045/0032—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks sequential injection from multiple gates, e.g. to avoid weld lines
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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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2709—Gates with a plurality of mould cavity inlets in close proximity
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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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2712—Serial gates for moulding articles in successively filled serial mould cavities
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- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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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 mud guard mold, which comprises a plurality of gates. Specifically, the gate G8 can be disposed in the mold in a bidirectional movement way and in a direction perpendicular to the demolding direction. The main part (1) of a mold cavity has thickness of 1.5mm, a first local part (2) has thickness of 1.8mm, and a second local part (3) has thickness of 2.5mm. The main body thickness of a mud guard produced by the mud guard mold decreases from 2mm to 1.5mm, the weight of a single part is reduced by 300g, and the weight of four mud guards is reduced by 1200g. The invention also provides an injection molding method matching with the mold. The method employs a new process of ''a vertical hot runner (with the opening direction of a needle valve being perpendicular to the demolding direction), ordinal opening, first opening and first close'', and realizes the purposes that large thin-wall workpieces like mud guards can control the mold clamping force within a required range, parts are free of burr and flash, and mass production can be smooth.
Description
Technical field
The present invention relates to molding technology field, be specifically related to mud guard mould and Shooting Technique thereof.
Background technology
Auto parts and components lightweight is the major way that reduces automobile making cost and automobile energy consumption.Except most parts " to mould Dai Gang ", increasing parts are by reducing to expect that thick mode realizes part lightweight.Particularly the large parts on automobile is as mud guard, and fender is mounted in wheel outside framework plank frame below, and its material is generally general-purpose plastics.Mainly more can: (1) splashes on vehicle body in order to prevent earth, causes vehicle body not attractive in appearance; (2) for fear of the handstone of carrying secretly in tire seam, get rid of on vehicle body, collapse this car and paint outward.In addition, mud guard can also increase vehicle body overall appearance.
If be reduced to 1.5mm by 2mm by the main body material of this part is thick, the weight of single part will reduce 300g, four mud guard weight reducing 1200g, and this reduction to complete vehicle weight is considerable.
In the light-weighted problem that there will be forming parts difficulty of part simultaneously.Because die cavity is thinner, the distance that flows is long, and not only flow resistance increases, plastics also can not be full of whole die cavity because temperature reduces in flow process, otherwise the burr of product is serious, increase extra modification operation to injection moulding operation, increase manufacturing cost.
Importantly, for heavy parts, due to large in stripping direction projected area, conventionally need larger clamp force, this has just proposed more harsh requirement to injection machine.
The thick 2mm that is of material of common mud guard, once there is project by the thick 1.8mm of reducing to of material, but unreasonable due to the design of running gate system and Shooting Technique, cause locking force of injection machine cannot meet production requirement, part burr is serious, cannot carry out smoothly volume production, expect that the most at last the thick 2mm of increasing to just completes production.And A94 mud guard main body material thick be 1.5mm, and locking force of injection machine is limited in 2300T, complete smooth volume production, need carefully consider running gate system and Shooting Technique.
At plastic melt, be filled in the process of die cavity, in order to overcome the power that in die cavity, melt has Injection Motor Template to impose on mould to the spreading power of mould, become clamp force.The unit of locking a door of injection machine must provide enough clamp forces, no person, and mould can be produced burr by spreading or plastic part in filling process.As shown in Figure 1, mould is contained between moving platen and front template.
In order to solve above-mentioned deficiency of the prior art, the present invention proposes a kind of new solution.
Summary of the invention
The object of this invention is to provide mud guard mould and Shooting Technique thereof, to realize mud guard, need lightweight, and the object that is no more than existing locking force of injection machine restriction triumph lightweight mud guard.
For reaching foregoing invention object, the technical solution adopted in the present invention is: mud guard mould is provided, comprises die cavity, described die cavity comprises ridge structure and the rear portion of front portion, centre, respectively ridge structure and the rear portion of the front portion of corresponding mud guard 0, centre;
The top of the ridge structure of described die cavity in the middle of mud guard 0 is provided with cast gate G1;
Between the top of the ridge structure of described die cavity in the middle of mud guard 0 and rear portion, be provided with cast gate G2;
The front, top of the ridge structure of described die cavity in the middle of mud guard 0 is provided with cast gate G3;
Between the top of the ridge structure of described die cavity in the middle of mud guard 0 and front portion, be provided with cast gate G4;
The rear portion of the ridge structure of described die cavity in the middle of mud guard 0 is provided with cast gate G5 in the outer part;
The front portion of the ridge structure of described die cavity in the middle of mud guard 0 is provided with cast gate G6 in the inner part;
The rear portion of the ridge structure of described die cavity in the middle of mud guard 0 is provided with cast gate G7 in the inner part;
The front portion of the ridge structure of described die cavity in the middle of mud guard 0 is provided with cast gate G8;
Described die cavity is provided with cast gate G9 before mud guard 0.
Described mould comprises plastic melt runner; Described plastic melt runner comprises and interconnects sprue bush 11 and hot runner manifold 22, and hot runner manifold 22 is provided with 9 transverse branch hot flow paths; 9 transverse branch hot flow paths are connected with 9 longitudinal heat flux roads downwards respectively; Wherein, 4 longitudinal heat flux roads are connected with cast gate G1 ~ G4 respectively, and another 4 longitudinal heat flux roads are respectively by cold runner and cast gate G5 ~ G7, and G9 is connected, cast gate G5 ~ G7, and G9 is cold cast gate; Last 1 longitudinal heat flux road is connected with cast gate G8 through lateral heat flow road.
Described cast gate G8 can be along being arranged in mould of moving with the mutual vertical bidirectional of stripping direction.
Described G1, G2, G3, G4, G5, G6, G7 and G9 can along with stripping direction being arranged in mould of bidirectional-movement that be parallel to each other.
The thick 1.5mm of major part 1 of die cavity, the thick 2.5mm of local one 2 thick 1.8mm, part 23; Major part 1 is anterior, front portion, top and the rear portion of middle ridge structure; The inside portion that part 1 is ridge structure; Local 23 is rear portion.
The present invention also provides a kind of Shooting Technique, comprises the process that plastic melt is filled to the die cavity of mould,
The needle-valve of each cast gate " order is opened, and first opens first and closes "; Unlatching and the duration of the needle-valve of each cast gate are as follows:
The needle-valve of cast gate G1 was opened at 0 second, continued to close after 4s; The needle-valve of cast gate G2, G3 is opened at 1.2s, continues to close after 2.8s; The needle-valve of cast gate G4 is opened at 1.9s, continues to close after 3.1s; The needle-valve of cast gate G5, G6 is opened when 2.8s, continues to close after 2.8s; The needle-valve of cast gate G7 is opened at 2.9s, continues to close after 2.6s; The needle-valve of cast gate G8, G9 is opened when 2.5s, continues to close after 1.5s.
The opening direction of described cast gate G8 is mutually vertical with stripping direction; Cast gate G1, G2, G3, G4, G5, G6, G7 and G9, opening direction is parallel with stripping direction.
Cast gate G1 flow is total flow 263/1385;
Cast gate G2 flow is total flow 162/1385;
Cast gate G3 flow is total flow 181/1385;
Cast gate G4 flow is total flow 169/1385;
Cast gate G5 flow is total flow 130/1385;
Cast gate G6 flow is total flow 129/1385;
Cast gate G7 flow is total flow 146/1385;
Cast gate G8 flow is total flow 118/1385;
Cast gate G9 flow is total flow 87/1385.
Described plastic melt is PP class material, and stream is long than getting 200.
The clamp force of die cavity is less than 2300T.
In sum, tool of the present invention has the following advantages:
1, the mud guard main body material of this mud guard mould production is thick is reduced to 1.5mm by 2mm, and the weight of single part will reduce 300g, four mud guard weight reducing 1200g, and this reduction to complete vehicle weight is considerable.And can guarantee bulk strength and shape.Met present auto parts and components lightweight to reduce the demand of automobile making cost and automobile energy consumption.
2, this mud guard mould provides a kind of new mode---vertical thermal runner (opening direction of needle-valve is vertical with stripping direction) that enters to water, and the design of each gate location has guaranteed that PP class material stream grows than getting 200.
3, Shooting Technique of the present invention is that provide in conjunction with mould new enters to water mode and Shooting Technique--" vertical thermal runner (opening direction of needle-valve is vertical with stripping direction), order is opened, and first opens first and closes ".Contrast, the cost of conventional mode hot flow path is lower, and process debugging is simple, is applicable to expect thick moderate, and accessory size is less, without the part of clamp force restriction, enters to water mode.New to enter to water mode hot runner structure complicated, and cost is higher, but is applicable to the thick thinner large-scale part of material, particularly to putting the part of gate location demoulding angle too small.
4, this Shooting Technique is very effective to controlling its injection pressure and clamp force.For " order is opened, and first opens first and the closes " mode in new technology, can avoid die cavity to reach maximum injection pressure simultaneously, very useful for the clamp force that reduces large size, thin walled part.Make clamp force lower than 2300T, need not change injection machine like this, surplus production cost.
5, this mud guard mould and Shooting Technique thereof have realized in the scope that large-scale thin wall parts as mud guard is controlled at clamp force requirement and the object of the smooth volume production of part non-trimming burr; Similarly the manufacture of large-scale thin wall parts does not provide important reference.
Accompanying drawing explanation
Fig. 1 is the structural representation of injection molding machine mold clamping mechanism;
Fig. 2 is the structural representation of mud guard 0, has also shown the wall thickness situation of mud guard 0 in figure;
Fig. 3 is the main TV structure schematic diagram of running gate system, has also shown the main TV structure schematic diagram of mud guard 0 in figure;
Fig. 4 is the left TV structure schematic diagram of running gate system, has also shown the left TV structure schematic diagram of mud guard 0 in figure;
Fig. 5 is the right TV structure schematic diagram of running gate system, has also shown the right TV structure schematic diagram of mud guard 0 in figure;
Fig. 6 is the perspective view of running gate system, has also shown the perspective view of mud guard 0 in figure.
Wherein,
A1, rear pattern plate; A2, moving platen; A3, front template;
0, mud guard; 1, major part; 2, local one; 3, local two;
G1～G9, cast gate G1～cast gate G9.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
-at plastic melt, be filled in the process of die cavity, in order to overcome the power that in die cavity, melt has Injection Motor Template to impose on mould to the spreading power of mould, become clamp force.The unit of locking a door of injection machine must provide enough clamp forces, no person, and mould can be produced burr by spreading or plastic part in filling process.As shown in Figure 1, mould is contained between moving platen A2 and front template A3.A1 is rear pattern plate.
Clamp force P
mshould meet following condition:
P
cp---cavity pressure (Kg/cm
2)
A---die cavity projected area (cm
2)
P
m---clamp force (ton)
In the situation that die cavity projected area is certain, clamp force is relevant with the pressure of die cavity.And for heavy parts mud guard, the projected area of die cavity is larger, it is more important that the control of injection pressure just seems.
As shown in Figure 2, the thick 1.5mm of material of the major part 1 of the mud guard 0 that this mould is manufactured, the thick 2.5mm of material of local 1 the thick 1.8mm of material, part 23.Assemble by double buckle and panel beating at a place, b place and c place, and assemble by double buckle and beater or beat-up at d place, and assemble by tapping screw and vehicle body lower decoration at e place, and assemble by four screws and bumper at f place.Major part 1 is the front portion of mud guard 0, front portion, top and the rear portion of middle ridge structure; Local 1 is the inside portion of mud guard 0 ridge structure; Local 23 is the rear portion of mud guard 0.
Accordingly, described die cavity comprises ridge structure and the rear portion of front portion, centre, respectively ridge structure and the rear portion of the front portion of corresponding mud guard (0), centre; The thick 1.5mm of the major part of die cavity (1), the thick 2.5mm of local one (2) thick 1.8mm, part two (3); Major part (1) is anterior, front portion, top and the rear portion of middle ridge structure; The inside portion that part one (2) is ridge structure; Local two (3) is rear portion.
High being of a size of of these mud guard 0 length and width: 940 * 571 * 322(mm), the flow process that material require is filled is longer.We apply the design that finite element software Moldflow carries out running gate system, conventionally with " the long ratio of stream ", represent the filling length of different materials under different pressures, and its computing formula is:
Long ratio=L/ the δ of stream
L in formula---each segment length (mm) flows
δ---each section of thickness (mm) flows
Stream is long to be changed than character, temperature, injection pressure, gate type with plastic melt.Following table is the approximate range of the long ratio of common plastics stream that drawn by practice, can be used as the reference of definite gate location:
The long ratio of stream of table one common plastics
According to the empirical value described in table one, for PP class material, for making injection pressure be no more than 70Mpa, stream is long than getting 200.
This mud guard 0 main body material is thick is 1.5mm, and product stream length need be less than 300mm so.Because this accessory size is larger, also restricted on the tonnage of injection machine: maximum clamp force can not surpass 2300T, directly according to stream is long, recently determine that gate location has very large risk, the empirical value of upper table can only be as a reference.Therefore by mold flow analysis Moldflow software, simulate, through checking, Design of Runner System is shown in following Fig. 3 to Fig. 6 the most at last.
As shown in Figures 3 to 6, plastic melt runner comprises and interconnects sprue bush 11 and hot runner manifold 22, and hot runner manifold (22) is provided with 9 transverse branch hot flow paths; 9 transverse branch hot flow paths are connected with 9 longitudinal heat flux roads downwards respectively; Wherein, 4 longitudinal heat flux roads are connected with cast gate G1 ~ G4 respectively, and another 4 longitudinal heat flux roads are respectively by cold runner and cast gate G5 ~ G7, and G9 is connected, cast gate G5 ~ G7, and G9 is cold cast gate; Last 1 longitudinal heat flux road is connected with cast gate G8 through lateral heat flow road.Each cast gate is all connected with die cavity.
Die cavity comprises ridge structure and the rear portion of front portion, centre, respectively ridge structure and the rear portion of the front portion of corresponding mud guard (0), centre;
The top of the ridge structure of die cavity in the middle of mud guard (0) arranges cast gate G1;
Between the top of the ridge structure of die cavity in the middle of mud guard (0) and rear portion, cast gate G2 is set;
The front, top of the ridge structure of die cavity in the middle of mud guard (0) arranges cast gate G3;
Between the top of the ridge structure of die cavity in the middle of mud guard (0) and front portion, cast gate G4 is set;
The rear portion of the ridge structure of die cavity in the middle of mud guard (0) arranges cast gate G5 in the outer part;
The front portion of the ridge structure of die cavity in the middle of mud guard (0) arranges cast gate G6 in the inner part;
The rear portion of the ridge structure of die cavity in the middle of mud guard (0) arranges cast gate G7 in the inner part;
The front portion of the ridge structure of die cavity in the middle of mud guard (0) arranges cast gate G8;
Die cavity arranges cast gate G9 before mud guard (0).
Long than requiring in order to meet part flow, in Design of Runner System, there is in design larger difference with normal pouring system.As cast gate G8, its opening direction is along the direction of arrow indication, and its direction is vertical with stripping direction.And conventional cast gate is as G1, G2, G3, G4, G5, G6, G7, G9, opening direction is parallel with stripping direction.Thisly enter to water mode and use still first on mud guard, solved to a great extent the problem that causes placing cast gate because drafting angle is too small, and shortened the long ratio of stream, reduced injection pressure, and then clamp force has been controlled in the scope of requirement.Because this part is to outward appearance no requirement (NR), so conventional mud guard all adopts the mode of filling simultaneously, be that a plurality of cast gates are opened simultaneously, but because each gate location can reach the maximum of injection pressure simultaneously, and whole die cavity, by the clamp force of needs maximum, cannot meet the requirement that clamp force is less than 2300T this moment.
Therefore, when Design of Runner System is such scheme, take special Shooting Technique: the needle-valve of each cast gate " order is opened, and first opens first and closes "; The unlatching of the needle-valve of each cast gate and duration are as shown in Table 2.
The needle-valve of cast gate G1 was opened at 0 second, continued to close after 4s; The needle-valve of cast gate G2, G3 is opened at 1.2s, continues to close after 2.8s; The needle-valve of cast gate G4 is opened at 1.9s, continues to close after 3.1s; The needle-valve of cast gate G5, G6 is opened when 2.8s, continues to close after 2.8s; The needle-valve of cast gate G7 is opened at 2.9s, continues to close after 2.6s; The needle-valve of cast gate G8, G9 is opened when 2.5s, continues to close after 1.5s.
Table two mud guard cast gate open and close timetable
We have also carried out analysis and calculation to the size of each cast gate and flow, draw the data as table three.
Each cast gate parameter list of table three
Through die trial checking, according to the cast gate open-interval control mode of table two, effectively clamp force is controlled in 2300T, and accessory appearance is good, non-trimming burr, can realize smooth volume production.
New aging method comparison
For mud guard part, conventional enter to water mode is generally " parallel hot flow path (opening direction of needle-valve is parallel with stripping direction), unlatching is closed simultaneously simultaneously " mode with Shooting Technique and fill.This project is reduced into 1.5mm because part material is thick by 2mm, need take new enter to water mode and Shooting Technique--" vertical thermal runner (opening direction of needle-valve is vertical with stripping direction), order is opened, and first opens first and closes ".Contrast, the cost of conventional mode hot flow path is lower, and process debugging is simple, is applicable to expect thick moderate, and accessory size is less, without the part of clamp force restriction, enters to water mode.
New to enter to water mode hot runner structure complicated, and cost is higher, but is applicable to the thick thinner large-scale part of material, particularly to putting the part of gate location demoulding angle too small, very effective to controlling its injection pressure and clamp force.Technology mode for " order is opened, and first opens first and closes " in new method can avoid die cavity to reach maximum injection pressure simultaneously, very useful for the clamp force that reduces large size, thin walled part.
Gate location and the design of order open-interval for large-scale thin wall parts, want that clamp force is controlled in the scope of requirement and part non-trimming burr is realized smooth volume production, if just by virtue of experience, subjective judgement, to have no theoretical foundation, after die trial, can repeatedly repair a die, debug difficulties equivalent risk.Only have flexible Application finite element software Moldlfow, add special enter to water mode and special cast gate opening ways, could realize part non-trimming burr and produce qualified parts, and clamp force is controlled in claimed range.
Although by reference to the accompanying drawings the specific embodiment of the present invention is described in detail, should not be construed as the restriction to the protection domain of this patent.In the described scope of claims, the various modifications that those skilled in the art can make without creative work and distortion still belong to the protection domain of this patent.
Claims (10)
1. mud guard mould, comprises die cavity, and described die cavity comprises ridge structure and the rear portion of front portion, centre, respectively ridge structure and the rear portion of the front portion of corresponding mud guard (0), centre; It is characterized in that:
The top of the ridge structure of described die cavity in the middle of mud guard (0) is provided with cast gate G1;
Between the top of the ridge structure of described die cavity in the middle of mud guard (0) and rear portion, be provided with cast gate G2;
The front, top of the ridge structure of described die cavity in the middle of mud guard (0) is provided with cast gate G3;
Between the top of the ridge structure of described die cavity in the middle of mud guard (0) and front portion, be provided with cast gate G4;
The rear portion of the ridge structure of described die cavity in the middle of mud guard (0) is provided with cast gate G5 in the outer part;
The front portion of the ridge structure of described die cavity in the middle of mud guard (0) is provided with cast gate G6 in the inner part;
The rear portion of the ridge structure of described die cavity in the middle of mud guard (0) is provided with cast gate G7 in the inner part;
The front portion of the ridge structure of described die cavity in the middle of mud guard (0) is provided with cast gate G8;
Described die cavity is provided with cast gate G9 before mud guard (0).
2. mould according to claim 1, is characterized in that: comprise plastic melt runner; Described plastic melt runner comprises and interconnects sprue bush (11) and hot runner manifold (22), and hot runner manifold (22) is provided with 9 transverse branch hot flow paths; 9 transverse branch hot flow paths are connected with 9 longitudinal heat flux roads downwards respectively; Wherein, 4 longitudinal heat flux roads are connected with cast gate G1 ~ G4 respectively, and another 4 longitudinal heat flux roads are respectively by cold runner and cast gate G5 ~ G7, and G9 is connected, cast gate G5 ~ G7, and G9 is cold cast gate; Last 1 longitudinal heat flux road is connected with cast gate G8 through lateral heat flow road.
3. mould according to claim 1 and 2, is characterized in that: described cast gate G8 can be along being arranged in mould of moving with the mutual vertical bidirectional of stripping direction.
4. mould according to claim 3, is characterized in that: described G1, G2, G3, G4, G5, G6, G7 and G9 can along with stripping direction being arranged in mould of bidirectional-movement that be parallel to each other.
5. mould according to claim 1, is characterized in that: the thick 1.5mm of the major part of die cavity (1), the thick 2.5mm of local one (2) thick 1.8mm, part two (3); Major part (1) is anterior, front portion, top and the rear portion of middle ridge structure; The inside portion that part one (2) is ridge structure; Local two (3) is rear portion.
6. Shooting Technique, comprises the process that plastic melt is filled to the die cavity of mould, it is characterized in that:
The needle-valve of each cast gate " order is opened, and first opens first and closes "; Unlatching and the duration of the needle-valve of each cast gate are as follows:
The needle-valve of cast gate G1 was opened at 0 second, continued to close after 4s; The needle-valve of cast gate G2, G3 is opened at 1.2s, continues to close after 2.8s; The needle-valve of cast gate G4 is opened at 1.9s, continues to close after 3.1s; The needle-valve of cast gate G5, G6 is opened when 2.8s, continues to close after 2.8s; The needle-valve of cast gate G7 is opened at 2.9s, continues to close after 2.6s; The needle-valve of cast gate G8, G9 is opened when 2.5s, continues to close after 1.5s.
7. by technique claimed in claim 6, it is characterized in that: the opening direction of described cast gate G8 is mutually vertical with stripping direction; Cast gate G1, G2, G3, G4, G5, G6, G7 and G9, opening direction is parallel with stripping direction.
8. by the technique described in claim 6 or 7, it is characterized in that:
Cast gate G1 flow is total flow 263/1385;
Cast gate G2 flow is total flow 162/1385;
Cast gate G3 flow is total flow 181/1385;
Cast gate G4 flow is total flow 169/1385;
Cast gate G5 flow is total flow 130/1385;
Cast gate G6 flow is total flow 129/1385;
Cast gate G7 flow is total flow 146/1385;
Cast gate G8 flow is total flow 118/1385;
Cast gate G9 flow is total flow 87/1385.
9. by the technique described in claim 5,6 or 7, it is characterized in that: described plastic melt is PP class material, stream is long than getting 200.
10. by the technique described in claim 5,6 or 7, it is characterized in that: the clamp force of die cavity is less than 2300T.
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| CN201310569328.0A CN103640152B (en) | 2013-11-15 | 2013-11-15 | Mud guard mould and Shooting Technique thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924529A (en) * | 2015-05-29 | 2015-09-23 | 浙江鑫鼎塑业有限公司 | Tray mold facilitating injection molding of bottom feet |
| CN106696163A (en) * | 2016-12-29 | 2017-05-24 | 重庆理工大学 | Injection molding technique for automobile body panel and electric automobile fender |
| CN109822817A (en) * | 2019-03-11 | 2019-05-31 | 番禺得意精密电子工业有限公司 | Molded part and its manufacturing method with sheet metal |
| EP4015183A1 (en) * | 2020-12-16 | 2022-06-22 | Ningbo Geely Automobile Research & Development Co. Ltd. | Injection moulding apparatus and method to reduce velocity increase of flow front during injection moulding |
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| CN201483684U (en) * | 2009-09-15 | 2010-05-26 | 群达模具(深圳)有限公司 | Automobile fender mold |
| CN203622810U (en) * | 2013-11-15 | 2014-06-04 | 成都航天模塑股份有限公司 | Splash guard mould |
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| JPH03281321A (en) * | 1990-03-30 | 1991-12-12 | Kinugawa Rubber Ind Co Ltd | Manufacture of mudguard for automobile |
| CN201483684U (en) * | 2009-09-15 | 2010-05-26 | 群达模具(深圳)有限公司 | Automobile fender mold |
| CN203622810U (en) * | 2013-11-15 | 2014-06-04 | 成都航天模塑股份有限公司 | Splash guard mould |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924529A (en) * | 2015-05-29 | 2015-09-23 | 浙江鑫鼎塑业有限公司 | Tray mold facilitating injection molding of bottom feet |
| CN104924529B (en) * | 2015-05-29 | 2017-06-27 | 浙江鑫鼎塑业有限公司 | The tray die of convenient injection footing |
| CN106696163A (en) * | 2016-12-29 | 2017-05-24 | 重庆理工大学 | Injection molding technique for automobile body panel and electric automobile fender |
| CN109822817A (en) * | 2019-03-11 | 2019-05-31 | 番禺得意精密电子工业有限公司 | Molded part and its manufacturing method with sheet metal |
| EP4015183A1 (en) * | 2020-12-16 | 2022-06-22 | Ningbo Geely Automobile Research & Development Co. Ltd. | Injection moulding apparatus and method to reduce velocity increase of flow front during injection moulding |
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|---|---|
| CN103640152B (en) | 2015-11-04 |
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