CN103522501A - Injection molding method of plastic worm wheel and injection mold assembly - Google Patents
Injection molding method of plastic worm wheel and injection mold assembly Download PDFInfo
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- CN103522501A CN103522501A CN201310530372.0A CN201310530372A CN103522501A CN 103522501 A CN103522501 A CN 103522501A CN 201310530372 A CN201310530372 A CN 201310530372A CN 103522501 A CN103522501 A CN 103522501A
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- worm gear
- injection
- slide block
- plastics
- oblique top
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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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4435—Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means
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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
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
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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
- B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
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- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Gears, Cams (AREA)
Abstract
The invention provides an injection molding method of a plastic worm wheel and an injection mold assembly. The injection mold assembly comprises a fixed mold part and a movable mold part, and the movable mold part comprises a plurality of circumferentially-arranged lateral sliding mechanisms and an ejection mechanism. The end portions, close to a circle center, of the lateral sliding mechanisms are in a fan-shaped tooth shape, and the fan-shaped tooth end portions of the lateral sliding mechanisms, the front mold cavity of the fixed mold part and the rear mold cavity of the movable mold part form the mold cavity of a plastic worm wheel mold. In the demolding process, the lateral sliding mechanisms laterally slide to be separated from the plastic worm wheel, the ejection mechanism arranged on the movable mold part ejects out the plastic worm wheel, and the finished product of the plastic worm wheel is obtained. An injection mold is simple in structure, the machining method of the injection molding method of the injection mold is diversified, the precision of a mold part is easy to control, the machining period is short, cost is low, and above all, large-batch production can be achieved on an injection molding machine, product precision is high, and the size is stable.
Description
Technical field
The present invention relates to a kind of injection mold component and injection moulding process, relate in particular to a kind of injection moulding process and injection mold component of plastics worm gear.
Background technology
Plastics worm gear is widely used in modern industry, and plastics worm gear and worm screw pairing are commonly used to transmit motion and the power between two alternating axis.It is large that worm-and-wheel gear has bearing capacity, has very large gearratio and axial force, compact conformation, and stable drive, vibrates littlely, and has the features such as auto-lock function.
The manufacture of plastics worm gear at present mainly realizes by following three kinds of modes:
1. use worm gear hob to process on gear-hobbing machine, worm gear hob need to be according to the parameter design of plastics worm gear, all very high to manufacturing the required precision of lathe of hobboing cutter and processing plastic worm gear.The customization hobboing cutter cycle is long, single product processing, and clamping is consuming time, and efficiency is low, and cost is high.The processing of single product clamping, also can produce clamping error, causes product size inconsistent, and Product Precision can not guarantee, can not meet existing market requirement.
2. for cost-saving and enhance productivity, most of producer changes plastics worm gear into plastic beveled wheel and coordinates transmission with worm screw.Helical teeth contacts with worm screw as some contact, characteristicness be bearing capacity little, rub large, fragile, and in machine applications, require to have the reductor of very strong auto-lock function, such as hoist engine, conveying equipment etc., so helical gear can not replace worm gear under many circumstances.
3. have partly plastic worm gear to utilize mould manufacture in the little situation of concave surface profile of tooth back-off, and gear ring obtains with electrocasting method, product takes to force pushing method depanning.It is long that this mode is manufactured the gear ring cycle, and cost is high.Because plastics worm gear product is forced to eject generation mechanically deform, the helical angle of plastics worm gear and profile of tooth can change, and Product Precision is poor.
Summary of the invention
The object of this invention is to provide a kind of injection moulding process and injection mold component of producing high accuracy plastics worm gear in enormous quantities of realizing.
The technical solution used in the present invention is:
A kind of injection moulding process of plastics worm gear, comprise: (1) matched moulds operation: the cover half part of plastics worm gear mould is partly carried out matched moulds with dynamic model, described dynamic model is partly equipped with some lateral sliding mechanisms that are circumferential arrangement, and described lateral sliding mechanism is sector shape near the end in the center of circle; Sector end, the front cavity of described cover half part and the rear cavity of described dynamic model part of described some lateral sliding mechanism is combined into the die cavity of described plastics worm gear mould;
(2) injection mo(u)lding operation: the plastics of molten condition are injected in the die cavity of described plastics worm gear mould by running gate system, the concave surface profile of tooth characteristic of the sector end combinatorial injection molding plastics worm gear of described some lateral sliding mechanism, the front mould characteristic of the front cavity injection-moulded plastic worm gear of described cover half part, the rear mold characteristic of the rear cavity injection-moulded plastic worm gear of described dynamic model part, the plastics of molten condition condense into solid shape plastics worm gear, injection mo(u)lding;
(3) stripping process: described lateral sliding mechanism lateral sliding departs from plastics worm gear, and the ejecting mechanism that described dynamic model partly arranges ejects plastics worm gear, obtains plastics worm gear finished product.
The injection mold component that the injection moulding process of described plastics worm gear adopts, it comprises cover half part and dynamic model part, described dynamic model partly comprises some lateral sliding mechanisms that are circumferential arrangement, and after injection moulding, the ejecting mechanism that plastics worm gear finished product is ejected; Described lateral sliding mechanism is sector shape near the end in the center of circle, and sector end, the front cavity of cover half part and the rear cavity of dynamic model part of described some lateral sliding mechanism form the die cavity of described plastics worm gear mould.
Preferably, described injection mold component, described lateral sliding mechanism is oblique top, the head of described oblique top is sector shape, the head both sides of described oblique top are the inclined-plane coordinating with adjacent oblique top, and the rear cavity that is the sector head of some oblique tops of circumferential arrangement, the front cavity of cover half part and dynamic model part is combined into the die cavity of described plastics worm gear mould; The back of described oblique top is provided with T shape projection, and the guiding angle of oblique top is 5 °～10 ° with respect to the direction that ejects of ejecting mechanism away from the center of described die cavity; Described oblique top is placed in oblique top gathering sill, and described oblique top gathering sill is provided with the T shape projection amalgamation with oblique top, and has the T connected in star of identical guiding angle with oblique top; Described ejecting mechanism is secondary ejecting mechanism, it comprises upper ejector plate and the lower liftout plate being installed on base plate, between described upper ejector plate and lower liftout plate, be provided with shutter, described upper ejector plate is fixed with for ejecting the first push rod of the plastics worm gear after injection moulding, and described lower liftout plate is fixed with the second push rod for ejection pitched roof.
Preferably, described injection mold component, described oblique top arranges position-limitting pin, in described oblique top gathering sill, is provided with pin stopper slot.
Preferably, described injection mold component, described lateral sliding mechanism is slide block, the head of described slide block is sector shape, the head both sides of slide block are the inclined-plane coordinating with adjacent sliders, and the rear cavity that is the sector head of some slide blocks of circumferential arrangement, the front cavity of cover half part and dynamic model part is combined into the die cavity of described plastics worm gear mould; Described slide block is placed in slider guide groove, and described slider guide groove leaves the space of sliding for slide block; Described slide block middle part is provided with oblique square groove, and the center position that described oblique square groove prolongs away from described die cavity from described slider top extends slide block inside; The lower end of the front cavity of described cover half part is fixed with the latch segment with the oblique square groove amalgamation of slide block.
Preferably, described injection mold component, the oblique square groove both sides of described slide block arrange the first press strip groove and the second press strip groove, the first annular press strip and the second annular press strip are placed in respectively in two annular press strip grooves that the first press strip groove of the some slide blocks that are circumferential arrangement and the second press strip groove form, and in described the first press strip groove and the second press strip groove, leave the slide block required space of sliding.
Preferably, described injection mold component, the bottom of described slide block arranges a circular pit, and described slider guide trench bottom arranges a location ripple pearl screw coordinating with circular pit; Matched moulds state, the sliding distance of slide block when circular pit is the demoulding with the distance of locating ripple pearl screw.
Beneficial effect of the present invention is:
The sector end of some lateral sliding of the present invention mechanism is combined into the outline of plastics worm gear, the shared position of lateral sliding mechanism ranking in injection mold is less, in the situation that product consumption is large, to implement a multi-cavity mold and more save injection moulding cost, benefit is higher.Injection mold structure of the present invention is simple, and processing mode variation, easily controls mould parts precision, and the process-cycle is short, and cost is low, the more important thing is and can on injection machine, realize large batch of production, and Product Precision is high, dimensionally stable.
Accompanying drawing explanation
Fig. 1 is the side diagram of a plastics worm gear product quoted of the present invention;
Fig. 2 is the schematic diagram that the some lateral sliding Mechanism Combinations that are circumferential arrangement of the present invention become a plastics worm gear product outline;
Fig. 3 is the cutaway view of die assembly matched moulds state in the embodiment of the present invention 1;
Fig. 4 is the cutaway view of die assembly demoulding state in the embodiment of the present invention 1;
Fig. 5 is the schematic diagram of oblique top in the embodiment of the present invention 1;
Fig. 6 is the schematic diagram of position-limitting pin in the embodiment of the present invention 1;
Fig. 7 is the schematic diagram that in the embodiment of the present invention 1, some lifter combinations that are circumferential arrangement become a plastics worm gear product outline;
Fig. 8 is the cutaway view of die assembly matched moulds state in the embodiment of the present invention 2;
Fig. 9 is the cutaway view of die assembly demoulding state in the embodiment of the present invention 2;
Figure 10 is the schematic diagram of slide block in the embodiment of the present invention 2;
Figure 11 is the schematic diagram of latch segment in the embodiment of the present invention 2;
Figure 12 is the schematic diagram of the first annular press strip in the embodiment of the present invention 2;
Figure 13 is the schematic diagram of the second annular press strip in the embodiment of the present invention 2;
Figure 14 is the schematic diagram that in the embodiment of the present invention 2, some slide blocks that are circumferential arrangement are combined into a plastics worm gear product outline.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail:
As shown in Figure 1, the present invention has quoted a plastics worm gear 101 that needs injection moulding, and it comprises tooth top region 100, concave surface profile of tooth characteristic 103, front mould characteristic 104 and rear mold characteristic 102.
The injection moulding process of plastics worm gear of the present invention is:
The cover half part 401 of plastics worm gear mould is carried out matched moulds operation with dynamic model part 402, and dynamic model part 402 is equipped with the some 201，Gai of lateral sliding mechanism lateral sliding mechanisms 201 that are circumferential arrangement and is sector shape near the end in the center of circle; Sector shape end, the front cavity 301 of described cover half part 401 and the rear cavity 302 of described dynamic model part 402 of some lateral slidings mechanism 201 is combined into the die cavity 303 of described plastics worm gear mould.The plastics of molten condition are injected in the die cavity 303 of described plastics worm gear mould by running gate system 318, the concave surface profile of tooth characteristic 103 of the sector shape end combinatorial injection molding plastics worm gear 101 of described some lateral sliding mechanism 201, the front mould characteristic 104 of the front cavity injection-moulded plastic worm gear 101 of described cover half part 401, the rear mold characteristic 102 of the rear cavity 302 injection-moulded plastic worm gears 101 of described dynamic model part 402, the plastics of molten condition condense into solid shape plastics worm gear 101, injection mo(u)lding.Described lateral sliding mechanism 201 departs from plastics worm gears 101, and the ejecting mechanism that described dynamic model part 402 arranges ejects plastics worm gear 101, obtains plastics worm gear finished product.
As shown in Figure 2, the injection mold component adopting according to the injection moulding manufacture method of described plastics worm gear, it comprises cover half part and dynamic model part, described dynamic model partly comprises some lateral sliding mechanisms 201 that are circumferential arrangement, the sector end that described lateral sliding mechanism 201 is combined into the concave surface profile of tooth characteristic 103(Ji Yi lateral sliding mechanism of plastics worm gear 101 near the sector end in the center of circle forms some profiles of tooth of plastics worm gear, the whole profiles of tooth that have been combined to form plastics worm gears of the sector end of some lateral slidings mechanism and synthetic gear ring thereof).Sector end, the front cavity of cover half part and the rear cavity of dynamic model part of described some lateral sliding mechanism 201 forms the die cavity of described plastics worm gear mould.Described dynamic model part also comprises the ejecting mechanism after injection mo(u)lding, plastics worm gear finished product being ejected.
The quantity of described lateral sliding mechanism and the number of teeth of its sector end, tooth pitch, fan-shaped radian are by determining in the number of teeth of concrete plastics worm gear product, situation that helical angle He lateral sliding mechanism glide direction does not have back-off.For not affecting Product Precision, the split line of described lateral sliding mechanism on product is arranged on the tooth top region 100 of plastics worm gear profile of tooth, can not be arranged on the flank of tooth and affect the use of product.
Embodiment 1:
As shown in FIG. 3 to 7, described lateral sliding mechanism is oblique top 501, the head of described oblique top is sector shape, described oblique top head 502 both sides are the inclined-plane 503 coordinating with adjacent oblique top, are the oblique top head 502 of sector shape of some oblique tops 501 of circumferential arrangement, the rear cavity 302 of the front cavity 301 of cover half part 401 and dynamic model part 402 is combined into the die cavity 303 of described plastics worm gear mould; The back 504 of described oblique top 501 is provided with T shape projection, and the guiding angle of oblique top 501 is 5 °～10 ° (preferably 8 °) with respect to the direction that ejects of ejecting mechanism away from the center of described die cavity 303; Described oblique top 501 is placed in oblique top gathering sill 304, and described oblique top gathering sill 304 is provided with the T shape projection amalgamation with oblique top 501, and has the T connected in star of identical guiding angle with oblique top 501; Described ejecting mechanism is secondary ejecting mechanism, it comprises upper ejector plate and the lower liftout plate being installed on base plate 305, between described upper ejector plate and lower liftout plate, be provided with shutter 308, described upper ejector plate is fixed with for ejecting the first push rod 306 of the plastics worm gear after injection moulding, and described lower liftout plate is fixed with the second push rod 307 for ejection pitched roof.
Described upper ejector plate comprises being stacked and merges upper ejector retainner plate 311 and the upper ejector retainner plate supporting plate 312 be fixedly connected with; Described lower liftout plate comprises being stacked and merges lower ejector retainner plate 313 and the lower ejector retainner plate supporting plate 314 be fixedly connected with.
Described oblique top 501 arranges position-limitting pin 601, in described oblique top gathering sill 304, is provided with pin stopper slot 309.Preferred embodiment one end of described position-limitting pin 601 is helical form as one, can screw in the screw hole 505 that oblique top 501 lower ends arrange and make it fixing; The other end of described position-limitting pin 601 is interior hexagonal shape, is convenient to use outer hexagonal spanner dismounting.The processing of described die assembly is completed by precise numerical control machine, guarantees Product Precision.
The course of work of the present embodiment:
Under mould closure state, limit lock 310, by A plate 315 and 316 lockings of B plate, prevents that mould is shifted in injection moulding process, guarantees Product Precision.Injection machine nozzle is aimed at the sprue bushing on cover half part 401 tops, the plastic warp running gate system 318 of molten condition, glue-feeder 317 are injected in the die cavity 303 of described plastics worm gear mould, the concave surface profile of tooth characteristic 103 of the oblique top head 502 injection-moulded plastic worm gears of the sector shape of described some oblique tops 501, the front mould characteristic 104 of the front cavity 301 injection-moulded plastic worm gears of described cover half part 401, the rear mold characteristic 102 of the rear cavity 302 injection-moulded plastic worm gears of described dynamic model part 402, injection mo(u)lding.Cover half part 401 is opened, and injection machine top rod 319 contacts with upper ejector plate with lower liftout plate and ejects (now, shutter 308 closures, connect upper ejector plate and lower liftout plate) through base plate 305; Meanwhile, the second push rod 307 ejects plastics worm gear along oblique top gathering sill 304 ejection pitched roof 501, the first push rods 306.When upper ejector plate upper surface touches square iron step 320, shutter 308 is stressed to be opened, lower liftout plate is static, oblique top 501 is static (in said process, oblique top departs from plastics worm gear gradually, and after oblique top is static, the head of oblique top thoroughly departs from plastics worm gear, position-limitting pin 601 is stuck in pin stopper slot 309, prevents oblique top 501 landings); Injection machine top rod 319 continues to eject, and the first push rod 306 continues to eject plastics worm gear 101, exceeds oblique top end face to plastics worm gear integral body, and now plastics worm gear can freely fall down or be taken out by manipulator.
Complete stripping process and take out after plastics worm gear, the preparation of the matched moulds operation of processing is next time: by A plate 315 and front cavity 301, push down release link 321 and oblique top realization reset, injection mold is in matched moulds state, as Fig. 3.
Embodiment 2:
As shown in Fig. 8 to 14, described lateral sliding mechanism is slide block 106, the head of described slide block 106 is sector shape, slider head 107 both sides are the inclined-plane coordinating with adjacent sliders, are the slider head 107 of sector shape of some slide blocks of circumferential arrangement, the rear cavity 302 of the front cavity 301 of cover half part 401 and dynamic model part 402 is combined into the die cavity 303 of described plastics worm gear mould; Described slide block 106 is placed in slider guide groove 801, and described slider guide groove 801 leaves the space of sliding for slide block 106; Described slide block middle part is provided with oblique square groove 110, and the center position that described oblique square groove 110 prolongs away from described die cavity 303 from described slider top extends slide block 106 inside; Front cavity 301 lower ends of described cover half part 401 are fixed with the latch segment 802 with oblique square groove 110 amalgamations of slide block 106.
Oblique square groove 110 both sides of described slide block 106 arrange respectively the first press strip groove 105 and the second press strip groove 109, the first annular press strip 121 and the second annular press strip 131 are placed in respectively in the first press strip groove 105 of the some slide blocks 106 that are circumferential arrangement and two annular press strip grooves of the second press strip groove 109 compositions, and required sliding space when leaving slide block 106 in described the first press strip groove 105 and the second press strip groove 109 and sliding, two annular press strips guarantee that slide blocks 106 steadily move.
The bottom of described slide block 106 arranges a circular pit 108, described slider guide groove 801 bottoms arrange a location ripple pearl screw 803 coordinating with circular pit 108, matched moulds state, the sliding distance of slide block 106 when the distance of circular pit 108 and location ripple pearl screw 803 is the demoulding, its sliding position when limiting slide block 106 demoulding.
Described ejecting mechanism comprises the liftout plate being installed on base plate 305, and described liftout plate is fixed with for ejecting the push rod 804 of the plastics worm gear after injection moulding.
Described liftout plate comprises being stacked and merges ejector retainner plate 805 and the ejector retainner plate supporting plate 806 be fixedly connected with.
The course of work of the present embodiment:
As shown in Figure 9, injection mold is closed, injection machine nozzle is aimed at the sprue bushing on cover half part 401 tops, the plastic warp running gate system 318 of molten condition, glue-feeder 317 are injected in the die cavity 303 of described plastics worm gear mould, the concave surface profile of tooth characteristic 103 of the slider head 107 injection-moulded plastic worm gears of the sector shape of described some slide blocks 106, the front mould characteristic 104 of the front cavity 301 injection-moulded plastic worm gears of described cover half part 401, the rear mold characteristic 102 of the rear cavity 302 injection-moulded plastic worm gears of described dynamic model part 402, injection mo(u)lding.Cover half part 401 is opened, drive the fixing latch segment 802 in front cavity 301 lower ends to move upward, slide block 106 drags the concave surface parts of tooth 103 that lower along continuous straight runs leaves plastics worm gear 101 on the inclined-plane of latch segment 802, location ripple pearl screw 803 snaps in the circular pit 108 of slide block 106 bottoms, and slide block is located.The push rod 804 that is fixed on liftout plate ejects plastics worm gear, exceeds slide block end face to plastics worm gear integral body, and now plastics worm gear can freely fall down or be taken out by manipulator.
Complete stripping process and take out after plastics worm gear, the preparation of the matched moulds operation of processing is next time: by A plate 315 and front cavity 301, push down release link, latch segment 802 and tiltedly square groove 110 amalgamations, realize slide block and reset, and injection mold is in matched moulds state, as Fig. 8.
The foregoing is only preferably embodiment of the present invention, be not used for limiting practical range of the present invention, the equivalence of in every case doing in protection scope of the present invention changes and modifies, and all should think and fall in protection scope of the present invention.
Claims (7)
1. an injection moulding process for plastics worm gear, is characterized in that:
(1) matched moulds operation: the cover half part of plastics worm gear mould is partly carried out matched moulds with dynamic model, and described dynamic model is partly equipped with some lateral sliding mechanisms that are circumferential arrangement, described lateral sliding mechanism is sector shape near the end in the center of circle; Sector end, the front cavity of described cover half part and the rear cavity of described dynamic model part of described some lateral sliding mechanism is combined into the die cavity of described plastics worm gear mould;
(2) injection mo(u)lding operation: the plastics of molten condition are injected in the die cavity of described plastics worm gear mould by running gate system, the concave surface profile of tooth characteristic of the sector end combinatorial injection molding plastics worm gear of described some lateral sliding mechanism, the front mould characteristic of the front cavity injection-moulded plastic worm gear of described cover half part, the rear mold characteristic of the rear cavity injection-moulded plastic worm gear of described dynamic model part, the plastics of molten condition condense into solid shape plastics worm gear, injection mo(u)lding;
(3) stripping process: described lateral sliding mechanism lateral sliding departs from plastics worm gear, and the ejecting mechanism that described dynamic model partly arranges ejects plastics worm gear, obtains plastics worm gear finished product.
2. the injection mold component adopting according to the injection moulding process of the plastics worm gear described in claim l, is characterized in that: it comprises cover half part and dynamic model part, and described dynamic model partly comprises
Some lateral slidings mechanism, is circumferential arrangement; With
Ejecting mechanism, after injection mo(u)lding, ejects plastics worm gear finished product;
Described lateral sliding mechanism is sector shape near the end in the center of circle, and sector end, the front cavity of cover half part and the rear cavity of dynamic model part of described some lateral sliding mechanism form the die cavity of described plastics worm gear mould.
3. injection mold component according to claim 2, it is characterized in that: described lateral sliding mechanism is oblique top, the head of described oblique top is sector shape, the head both sides of described oblique top are the inclined-plane coordinating with adjacent oblique top, and the rear cavity that is the sector head of some oblique tops of circumferential arrangement, the front cavity of cover half part and dynamic model part is combined into the die cavity of described plastics worm gear mould; The back of described oblique top is provided with T shape projection, and the guiding angle of oblique top is 5 °～10 ° with respect to the direction that ejects of ejecting mechanism away from the center of described die cavity; Described oblique top is placed in oblique top gathering sill, and described oblique top gathering sill is provided with the T shape projection amalgamation with oblique top, and has the T connected in star of identical guiding angle with oblique top; Described ejecting mechanism is secondary ejecting mechanism, it comprises upper ejector plate and the lower liftout plate being installed on base plate, between described upper ejector plate and lower liftout plate, be provided with shutter, described upper ejector plate is fixed with for ejecting the first push rod of the plastics worm gear after injection moulding, and described lower liftout plate is fixed with the second push rod for ejection pitched roof.
4. injection mold component according to claim 3, is characterized in that: described oblique top arranges position-limitting pin, in described oblique top gathering sill, is provided with pin stopper slot.
5. injection mold component according to claim 2, it is characterized in that: described lateral sliding mechanism is slide block, the head of described slide block is sector shape, the head both sides of slide block are the inclined-plane coordinating with adjacent sliders, and the rear cavity that is the sector head of some slide blocks of circumferential arrangement, the front cavity of cover half part and dynamic model part is combined into the die cavity of described plastics worm gear mould; Described slide block is placed in slider guide groove, and described slider guide groove leaves the space of sliding for slide block; Described slide block middle part is provided with oblique square groove, and described oblique square groove extends slide block inside from described slider top along the center position away from described die cavity; The lower end of the front cavity of described cover half part is fixed with the latch segment with the oblique square groove amalgamation of slide block.
6. injection mold component according to claim 5, it is characterized in that: the oblique square groove both sides of described slide block arrange the first press strip groove and the second press strip groove, the first annular press strip and the second annular press strip are placed in respectively in two annular press strip grooves that the first press strip groove of the some slide blocks that are circumferential arrangement and the second press strip groove form, and in described the first press strip groove and the second press strip groove, leave the slide block required space of sliding.
7. according to the injection mold component described in claim 5 or 6, it is characterized in that: the bottom of described slide block arranges a circular pit, described slider guide trench bottom arranges a location ripple pearl screw coordinating with circular pit; Matched moulds state, the sliding distance of slide block when circular pit is the demoulding with the distance of locating ripple pearl screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310530372.0A CN103522501A (en) | 2013-10-30 | 2013-10-30 | Injection molding method of plastic worm wheel and injection mold assembly |
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| CN201310530372.0A CN103522501A (en) | 2013-10-30 | 2013-10-30 | Injection molding method of plastic worm wheel and injection mold assembly |
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Cited By (7)
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| CN104943073A (en) * | 2015-06-30 | 2015-09-30 | 芜湖奕辰模具科技有限公司 | Magnetic-ring driving wheel injection mold |
| CN105729724A (en) * | 2016-04-13 | 2016-07-06 | 海信（山东）冰箱有限公司 | Injection mold |
| CN109049551A (en) * | 2018-08-30 | 2018-12-21 | 珠海格力精密模具有限公司 | A kind of inclined-ejection core pulling mechanism and the injection mold with the structure |
| CN110802858A (en) * | 2019-11-25 | 2020-02-18 | 衡阳市鑫诚和重型机械设备制造有限公司 | Production process of speed reduction worm gear in water treatment system |
| CN111571960A (en) * | 2020-05-17 | 2020-08-25 | 宁波正佳模塑有限公司 | Demoulding mechanism and demoulding method of staggered-tooth snap ring plastic part forming mould |
| CN113211688A (en) * | 2021-05-08 | 2021-08-06 | 珠海格力大金精密模具有限公司 | Impeller mould shedder |
| CN113442386A (en) * | 2021-08-30 | 2021-09-28 | 南通诺澳电子有限公司 | Automatic demoulding system for injection moulding of plastic manufactured products |
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Application publication date: 20140122 |