CN109483825A - Plastic lid injecting molding die is buckled in more specifications - Google Patents
Plastic lid injecting molding die is buckled in more specifications Download PDFInfo
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- CN109483825A CN109483825A CN201910037816.4A CN201910037816A CN109483825A CN 109483825 A CN109483825 A CN 109483825A CN 201910037816 A CN201910037816 A CN 201910037816A CN 109483825 A CN109483825 A CN 109483825A
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- Prior art keywords
- plate
- hole
- dynamic model
- guide
- guide post
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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
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
-
- 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
Abstract
The invention discloses plastic lid injecting molding die is buckled in more specifications, it is related to mold design and machine-building general field.Its mold mechanism includes dynamic model part and cover half part and its each component part and its relevant parameter, and one of feature is that corresponding oblique top is designed for the plastics electrical equipment lid containing interior buckle carries out secondary abjection using the interior draft of oblique top during the motion under the effect of push plate fixed plate after dividing mould；The two of feature are that a multi-cavity mold is arranged.The plastic part containing interior buckle can be formed in the case where guaranteeing surface quality by being had using the injection-molded item of technical solution of the present invention production, it is easy to operate simultaneously, structure is simple, one-pass molding can at most form four plastic parts, production efficiency is substantially increased, while molding plastic part thickness is uniform, no face checking, buckle structure is stablized, phenomena such as without obvious band, crack.
Description
Technical field
The present invention relates to the designs that plastic lid injecting molding die is buckled in more specifications, using three plate mould structures and
Angle ejector push-out mechanism is to make plastic lid form, and the present invention relates to mold design and mechanical manufacturing field complex arts.
Background technique
Injection moulding refers to through designed molding die, under the promotion of injector pressure, so that plastic liquid quilt
Injection enters mould inside, deviates from after cooling, to obtain required plastic products.For the plastics system buckled containing inside
Part, two common template die mechanisms can not be released normally, be released even if devising the two template die structures containing interior buckle abjection,
Still there can be the disadvantages of easy material stock of clamping part partial volume, rough surface, forming defect after dividing mould.Therefore a kind of oblique top release is designed
Mechanism carries out secondary abjection after dynamic model is separated with cover half to make buckle structure smoothly form and become technical field urgent need solution
Certainly the problem of.
Meanwhile during mold production, if a plastic part is only deviate from primary demoulding, for the production of mass production
For product, the waste on time and manpower and material resources will cause, therefore, how reasonably the production process of mold to be optimized,
Under the premise of guaranteeing its quality of production, the one-time formed product number of the raising for keeping it as high as possible during one-pass molding
Amount is equally also of great significance to raising enterprises production efficiency and product competitiveness.
Summary of the invention
The purpose of the present invention is the molds of the multiple molding plastic parts of one-pass molding for the plastic part with interior buckle
Design scheme.
The course of work of the mold are as follows: dynamic model merges with cover half, and injector injects injection material in mold, to be cooled complete
It is separated at rear moving template and solid plate, then solid plate is motionless, and the angle ejector push-out mechanism of moving template is started to work, and pitched roof mechanism is opened
Beginning work has gradient, starts to release in upper ejector plate, due to the work of oblique top in push due to being oblique top when work
With deviating from molding plastic part from moving template, is resetted under the action of reset spring again after demoulding, complete one injection
Journey.
For achieve the purpose that it is described the technical scheme is that
A kind of mold of plastic lid, molding by plastic injection material for manufacturing, the plastic lid containing interior buckle needs one
The mold of the secondary multiple plastic parts of molding.Including overall structure, 2 part of forming parts.Wherein:
The general mould structure is upright setting, including cover half part and dynamic model part；The cover half part is located at upper
Portion, cover half part are located at corresponding lower part；Plastic melt is entered inside forming parts by running gate system and is cooled to when molding
Type；
The forming parts include punch-pin and cavity plate and corresponding insert；The forming parts are generally rectangle
Cube body mechanism, die joint are chosen at the bottom surface of molding plastic part；Punch-pin links together with punch insert, is responsible for molding electricity
The bottom surface portions of device lid；Cavity plate links together with die plate insert, is responsible for the summit portion of molding electrical equipment lid；Die plate insert and convex
Mould insert is integrally respectively embedded in corresponding solid plate and moving template；
Position when the cover half part determines that the two separates or merges with guide sleeve by guide post with dynamic model part
Accuracy；Guide sleeve is located at cover half part, and guide post is fixed on dynamic model part through dynamic model and cover half part, guide post.
When forming die sinking, guide post is moved under the guiding role of guide sleeve to underface, thus separate dynamic model with cover half,
Complete primary die sinking process；It is opposite when molding；
The cover half part further comprises solid plate, cavity plate, die plate insert, top clamping plate, locating ring, nozzle cage, leads
Column sleeve；
The solid plate is in rectangular cubic structure, is provided with the space for being equipped with die plate insert, die plate insert below
It is connected to a fixed by 4 screws with solid plate；In solid plate right center position, there are two water hole A, B for setting, and two water holes are
Perforation, cooling water channel is provided with around punch insert inside solid plate, which is A, is exported as B；
The guide column sleeve is arranged in the through-hole of the solid plate quadrangle by force fit, which passes through 6 spiral shells
Bolt is mutually fixed with top clamping plate；
The nozzle is set on the center above solid plate；
The top clamping plate is rectangular plate-like structure, and a countersunk head through-hole is arranged in center, which is annular flange
Dish structure is fastenedly connected by two screws with top clamping plate；
The dynamic model part further comprises moving template, Bottom clamp plate, cushion block, ejector pin retaining plate, push rod support plate, resets
Spring, guide post, angle ejector push-out mechanism, guide post, spring guide pillar；
The moving template generally rectangular cubic body mechanism, top are equipped with punch insert, and punch insert passes through 4 spiral shells
Nail is connected to a fixed with moving template；In its front and rear sides, side is respectively set there are two through-hole, and upper surface is circular through hole, lower surface
To sink to the bottom through-hole, it is responsible for installation reset spring；In the setting of its surrounding, there are four through-holes, are responsible for installation guide post；It sets inside it
8 oblique through holes are equipped with, which is rectangle, and tilt angle is 12 °；It is logical that it is provided with 16 round guide posts in its center
Hole；
In active and inactive mold plate right center position, setting is there are two water hole C, D, and two water holes are perforations, in active and inactive mold intralamellar part
Cooling water channel is provided with around punch insert, which is C, is exported as D；
Four upright guides are respectively set in the solid plate surrounding, and the guide column sleeve on the upright guides and moving template matches
It closes, when being opened or molding, guide post vertical movement up and down in guide column sleeve；
The ejector pin retaining plate generally rectangular plate-like structure；At the two-part respective center in its left and right, 8 tops are respectively set
Needle through-hole；
The spring guide pillar top be it is discoid, rest part is cylindrical body；Top is in contact with ejector pin retaining plate, remaining
Reset spring is run through into moving template spring guide pillar through-hole by ejector pin retaining plate through-hole in part；Spring guide pillar is respectively equipped with one
Reset spring；
Respectively there are four sink to the bottom through-hole to push rod support plate lower surface surrounding；Push rod support plate passes through fixed screw and push rod
Fixed plate is connected to a fixed；
The cushion block generally rectangular cubic structure designs three through-holes in its height direction；
Since the presence of cushion block generates a rectangular space between the ejector pin retaining plate and push rod support plate and moving template, from
And spring is compressed in this space, so that ejector pin retaining plate is secured to plate and moves upwards together；
The Bottom clamp plate is rectangular plate-like structure, designs four in its lower surface quadrangle and sinks to the bottom through-hole；In itself and cushion block
Three bolts hole are respectively designed on the both sides that connect；
The cushion block is connected to a fixed with Bottom clamp plate by the bolt of quadrangle；The Bottom clamp plate, cushion block, moving template are logical
6 long foot bolts are crossed to be connected to a fixed；
The angle ejector push-out mechanism main part is made of three oblique top ontology, oblique jacking guide bar, tilted footstock parts, this
Body crosses over moving template, Bottom clamp plate, four ejector pin retaining plate, push rod support plate parts；Tilted footstock is embedded in ejector pin retaining plate structure
Between (ejector pin retaining plate and push rod support plate), oblique jacking guide bar connects tilted footstock and oblique top main body；Oblique top bottom and tilted footstock
Between be equipped with pin shaft, so that oblique top is rotated in tilted footstock；There is certain gap in the through-hole of oblique jacking guide bar and moving template,
Otherwise movement can not normally be released；Design has guide sleeve among through-hole, fixes oblique jacking guide bar with through-hole；
It is rectangular cubic protrusion at the top of the oblique top, in rectangular cubic external surface, there are a groove, this grooves
The responsible interior buckle part of molding plastic part, after injection material injects groove, molding required interior buckle to be cooled after finishing abjection；
When the mould secondary is released, ejector pin retaining plate moves upwards together with push rod support plate, reaches and releases stroke end
Stop after point, in this process, 4 symmetrical oblique tops in center slide up and down in solid plate, and oblique top and tilted footstock have two
Movement on a direction, one be oblique top and T-slot sliding, one is rotation of the oblique top around pin shaft.Since oblique top has tiltedly
Degree, can generate an inward force, by the movement of this power and oblique top, so that tiltedly to electrical equipment lid itself during the motion
Top is separated with buckle, to successfully deviate from；
Described its parameter of more specification moulding plastics electrical equipment lids are as follows: being injection moulded more specification electrical equipment lid outer dimension ranges is
(85-90) mm × (87-90) mm × (7-9) mm, two opposite side of inner surface have one section of square ladder, and side length 2-3mm is average
Wall thickness 2-2.5mm, most thickness is 5-7mm at ladder.Have among electrical equipment lid the rectangle inner cavity of an a length of 20cm wide 8cm with
And four a length of 9cm wide are 8cm small rectangle inner cavity, the depth of inner cavity is 2mm.There are four the inside of plastics electrical equipment lid buckles,
For rectangular prismatoid, convex 2-3mm is buckled, buckle upper surface length is 5-7mm, lower surface 7-9mm, buckles lower surface distance
Electrical equipment lid bottom 3-4mm, four buckles are to be arranged symmetrically；Pattern draft is 1.5 ° -2 °；Plastic part volume is (17-20) cm3,
It injects plastics and selects ABS；
A kind of optimal technical scheme of number of cavity, it is characterised in that affiliated (2) its number according to injection volume formula (1) with
And the comprehensive determination of clamp force formula (2)
In formula, V is the nominal injection volume of injector, cm3.The volume of V1 individual plastic part product, cm3, V2 are casting systems
System total volume, cm3；F is the specified clamp force of injection molding machine, and KN, P are the average pressures of the intracavitary plastic melt of type, and Mpa, A1 are to pour
Projected area of the injection system on die joint, cm2.A2 is projected area of the single plastic on die joint, cm2.According to formula
Obtain number of cavity 1-4.
A kind of optimal technical scheme of determining die joint, it is characterised in that in mold design, usually according to projected area
Maximum face as die joint, if in the present invention in view of die joint selection at the top surface of plastic lid since thickness herein is too big
To can have an impact to the surface quality of product after molding, therefore factor both is combined to select plastic lid bottom surface as die joint,
Advantage is to be both the maximum face in section herein, while not having an impact to plastic requirement and presentation quality.
A kind of optimal technical scheme of molded parts size, it is characterised in that be preset to plastic cover production batch be
100000/year, are designed as integral embedded type, are directly embedded into fixed plate by monoblock type concave-convex mold as insert, its advantage is that
Easy to process, vulnerable part is conveniently replaceable.3. its size design obtains specific size according to average shrinkage ratio method.It is obtained according to this method
Cavity plate radial dimension, die depth size, punch-pin radial dimension, punch-pin height dimension.
A kind of optimal technical scheme of concave-convex mold insert design, it is characterised in that cavity plate is using whole insert or composite structure, material
Material selection P20, plastic generally rectangular or square, insert also use rectangular insert (easy to process), are fixed with screw.
It is square according to the shape approximation of projected area combination plastic of the plastic on die joint itself, takes the cavity plate side wall length to be
20-50mm takes wall thickness 37mm on the upside of the length direction of cavity plate, it is determined that the length of insert is 37 × 2+86=160mm.Together
Reason, width direction upside wall thickness are taken as 28mm, then insert length is 28 × 2+86=142mm.The thickness of female bottom size
Generally by structure determination, for plastic sheet as flat pieces, running gate system takes the thickness of bottom to fix tentatively as 28- preferably based on elongated
30mm.Due to cavity plate with punch-pin be it is complementary, punch insert length and width dimensions should be identical as cavity plate size, equally adopt
With P20 material, screw is fixed；
A kind of optimal technical scheme that standard die set is chosen, it is characterised in that affiliated (4) are according to GB/T12556-90 " plastics
The middle-size and small-size mould bases of injection mold and technical conditions ", applicable <=5.60 template size B × L × 900mm, the selection method of mould bases
It is 5. calculated according to following empirical equation；
Projection width W1 of the plastic on die joint must satisfy: W1≤W2-10mm； ⑤
Projected length L1 of the plastic on die joint must satisfy: L1≤L2-d-30mm；
W2 is upper ejector plate width in formula, and L1 is the spacing of release link in the longitudinal direction, and d is to reset shank diameter.
It is (85-90) mm × (87-90) mm × (7-9) mm, rule of thumb formula 87 according to electrical equipment lid outer dimension range
≤W2- 10mm, it is assumed that the design of two chamber of a mould, therefore W2The both sides >=97 × 2=194mm respectively reserve 50mm spacing install other zero
Part, so width should take W=350mm for W=194+100=294, the corresponding shank diameter that resets is d=20mm；It is rule of thumb public
86≤L2-20-30 of formula can obtain the spacing L2 >=136 of release link in the longitudinal direction, and two chamber of mould arrangement, both sides are respectively flowed out
50mm spacing, so L=130 × 2+100=372 takes L=400mm；To design mould bases selection dragon note style big water gap mould bases series B
× L is 350mm × 400mm；Model A1 type, take upper ejector plate with a thickness of 20mm；When four chamber of a mould sets clocking method and two
It is identical when chamber；It is comprehensive according to the standard die set combination mould bases overall structure of selection to cover half seat version, solid plate, the design of cushion block board size
It closes and determines；
The size of each part according to the specification angle ejector push-out mechanism of plastic part is that Core-pulling distance is (6.5-8) mm, upper ejector plate
Thickness (18-22) mm.Respectively there is a groove at oblique top both ends, and oblique top section is rectangle, and side length 5--7mm, oblique top inclination angles are such as
Fruit is excessive, and the moment of flexure for bearing oblique top is excessive, on the other hand Core-pulling distance is increased, and taking it here is 10 ° -12 °,
Stroke 35-40mm is released, oblique top total length is 150-165mm.Convex block sectional dimension is identical as oblique top.The long 13-18mm of tilted footstock,
Wide 13-18mm, high 30mm, T-slot width 8-12mm, pin groove diameter 2-4mm；
A kind of running gate system optimal technical scheme, it is characterised in that: affiliated sprue bush material selection T10A, shape are
Cone, cone angle are 5 °, and surface roughness RA is 0.8 μm.Sprue recessed radius of a ball 6-7mm, depth 4-5mm, runner segment are straight
Diameter 3.9-4.1mm, big section diameter 4.1-4.15mm, flow channel length 67-68mm.Shape is cone, and cone angle is 5-6 °, and surface is thick
Rugosity RA is 0.8 μm；Runner length 13-14mm, diameter 8-8.5mm.Side gate, a length of 1mm, width 3mm, depth 1mm.
Using the gap exhaust between part；
A kind of optimal technical scheme of cooling water channel, it is characterised in that cooling using cooling water.Cooling time 9-10s.It is cold
But pipeline section is circle, diameter 6-6.5mm.Minimum flow rate is 2.16m/s, mean flow rate 7.6m/s, heat transfer coefficient h=
91044KJ/(m2×h×C)；Total heat conduction area A=0.01m2, total length 1.65-1.68m, cooling water hole number are 2.Electricity
Device lid size itself is smaller, and flash gap can satisfy exhaust requirements, thus using between part gap exhaust by the way of into
Row exhaust；
A kind of optimal technical scheme of guide post, it is characterised in that guide post type is straight guide post, and guide post front end is taper, half cone
Angle number a is taken as 12-15 °, and guide post and support plate bottom H7/k6 transition fit, slipper use H8/f7 clearance fit, table
Surface roughness size is Ra0.8 μm, guide post diameter 33-37mm, and guide post length is 90-100mm, material selection T10A surface hardening
Processing；
A kind of optimal technical scheme of guide sleeve, it is characterised in that guide sleeve type is to take the lead guide sleeve, according to GB6149.2-
1984, material selection No. 20 steel surfaces quenching treatment, guide sleeve section is inside and outside and the front end rounded corner of pilot hole, surface roughness
Ra0.8μm.Taking the lead guide sleeve diameter of bore is 36-37mm, and outer diameter 41-43mm, head outside diameter is 46-48mm, wall
Thick 2.8-3.2mm.Guide post and guide sleeve, which are matched, is combined into H7/m6 clearance fit；
Have and can be formed in the case where guaranteeing surface quality using the injection-molded item of technical solution of the present invention production
Plastic part containing interior buckle, at the same it is easy to operate, and structure is simple, and one-pass molding can at most form four plastic parts, mentions significantly
High production efficiency, while molding plastic part thickness is uniform, no face checking, buckle structure is stablized, without obvious band, crack
Phenomena such as；
Detailed description of the invention
Fig. 1 is that plastic lid injecting molding die structural exploded view is buckled in more specifications
Fig. 2 is mold overall perspective
Fig. 3 is mold front view
Fig. 4 is mold left view
Fig. 5 is mold top view
Figure label is A01. locating ring；A02. nozzle cage；A03., screw is installed；A04. top clamping plate；A05. guide sleeve；
A06. solid plate；A07. die plate insert；B01. punch insert；B02. guide post；B03. moving template；B04. reset spring；B05. it pushes away
Plate support plate；B06. screw；B07. the fixed version of push plate；B08. cushion block；B09. Bottom clamp plate；B10. screw；B11. long foot screw；
B12. thimble；B13. sprue puller；B14. tilted footstock；B15. oblique top；B16. spring guide pillar；C. moulding plastics lid.
Specific embodiment
Technical solution of the present invention is described in detail as follows with reference to the accompanying drawing, completely describes skill of the invention comprehensively with sharp
Art scheme.
A kind of more specifications are interior to buckle plastic lid injecting molding die, molding by plastic injection material for manufacturing, containing in
The plastic lid of buckle needs the mold of the multiple plastic parts of one-pass molding.Including die ontology, 2 part of forming parts.Wherein:
The die ontology is upright setting, including cover half part A and dynamic model part B；The cover half part is located at top,
Cover half part is located at corresponding lower part；
The forming parts include punch insert B01 and die plate insert A07；The forming parts are generally rectangle
Cube body mechanism, die joint are chosen at the bottom surface of molding plastic part；Punch-pin links together with punch insert B01, is responsible for into
The bottom surface portions of type electrical equipment lid；Cavity plate links together with die plate insert A07, is responsible for the summit portion of molding electrical equipment lid；Expansion
Body is respectively embedded in corresponding solid plate A06 and moving template B03；
When the cover half part determines that the two separates or merges with guide sleeve A05 by guide post B02 with dynamic model part
Wait the accuracy of position；Guide sleeve A05 is located at cover half part, and guide post B02 runs through dynamic model and cover half, is fixed on dynamic model part.
When forming die sinking, guide post B02 is moved under the guiding role of guide sleeve A05 to underface, to make dynamic model and determine
Primary die sinking process is completed in mould separation；It is opposite when molding；
The cover half part further comprises locating ring A01, nozzle cage A02, mounting screw A03, top clamping plate A04, leads
To set A05, solid plate A06, cavity plate, die plate insert A07；
The solid plate A06 is in rectangular cubic structure, is provided with the space for being equipped with die plate insert A07 below, recessed
Mould insert A07 is connected to a fixed by 4 screws with solid plate；It is arranged in solid plate right center position there are two water hole A, B,
Two water holes are perforations, are provided with cooling water channel around punch insert A07 inside solid plate, which is A,
Outlet is B；It is the temperature range for making mold keep certain using the cooling purpose of cooling water, so that shaped article quality is protected
Card；
The guide sleeve A05 is arranged in the through-hole of the solid plate quadrangle by force fit, the effect of guide column sleeve A05
It is to reduce friction, keeps guide post smoother when moving up and down；Solid plate A06 passes through 6 screw A03 and top clamping plate A04 phase
It is fixed；That is the effect of template fixing screws A03 is fixed form A03 and top clamping plate A04；The nozzle cage A02 setting is fixed
Center above template；Nozzle cage A02 is responsible for docking injection molding machine nozzle, is that injection material is smoothly smooth into mold by it
It is internal；
The top clamping plate A04 is rectangular plate-like structure, and a countersunk head through-hole is arranged in center, is used to placement positioning circle
A01 is annular flange dish structure, is fastenedly connected by two screws with top clamping plate；That is the effect of screw is to make locating ring
A01 is fixed on top clamping plate A04；The effect of top clamping plate A04 is lower section embedded with die plate insert A07, at the same with injector pressure
Plate matches, and so that injector is had stress object in injection, so that injection process is steady；
The dynamic model part further comprises punch insert B01, guide post B02, moving template B03, reset spring B04, push rod branch
Fagging B05, it screw B06, ejector pin retaining plate B07, cushion block B08, Bottom clamp plate B09, screw B10, screw B11, thimble B12, draws
Expect bar B13, angle ejector push-out mechanism B14, B15；
The moving template B03 generally rectangular cubic body mechanism, top are embedded with punch insert B01, and punch insert B01 is logical
4 screws are crossed to be connected to a fixed with moving template；In its front and rear sides, side is respectively set there are two through-hole, and upper surface is round logical
Hole, lower surface are to sink to the bottom through-hole, are responsible for installation reset spring B04；In the setting of its surrounding, there are four through-holes, are responsible for installation guide post
B02；It is provided with 8 oblique through holes inside it, which is rectangle, and tilt angle is 12 °, for assembling oblique top；?
Its left and right two parts center is each provided with 5 round thimble through-holes, for assembling thimble；In its position of centre of gravity, one through-hole is set,
For assembling sprue puller B13；
In moving template B03 right center position, setting is there are two water hole C, D, and two water holes are perforations, in active and inactive mold plate B03
Inside is provided with cooling water channel around punch insert B01, which is C, exports as D；
The moving template B03 surrounding is respectively set on four upright guides B02, upright guides B02 and solid plate A06
Guide column sleeve A05 is matched, when being opened or molding, guide post B02 vertical movement up and down in guide column sleeve A05；
The push rod support plate B05 generally rectangular plate-like structure；Respectively it is arranged 8 at the two-part respective center in its left and right
Thimble through-hole；
The corresponding guide post top the reset spring B04 be it is discoid, rest part is cylindrical body；Top and ejector pin retaining plate
It is in contact, rest part runs through reset spring B04 into moving template spring guide pillar through-hole by push rod support plate B05 through-hole；Bullet
Spring guide post B16 is respectively equipped with a reset spring B04；The effect of spring guide pillar B16 be make spring defined vertical direction into
Row is shunk；The effect of reset spring B04 is to reset mold after the completion of two-step ejecting；
The cushion block B08 generally rectangular cubic structure designs three through-holes in its height direction；Cushion block B08's
Effect is that a rectangular space is formed between the two, provides necessary possibility for two-step ejecting；
Respectively there are four sink to the bottom through-hole to the lower surface push rod support plate B05 surrounding；Push rod support plate B05 passes through fixed screw
B06 is connected to a fixed with ejector pin retaining plate B07；I.e. fixed screw makes ejector pin retaining plate B07 and push rod support plate B05 be connected as one
Body can move up and down in the space between two cushion block B08 together；
Since the presence of cushion block B08 generates between the ejector pin retaining plate B07 and push rod support plate B05 and moving template B03
One rectangular space, so that reset spring B04 can be compressed in this space, so that push rod support plate B05 is secured to
Plate B07 is moved upwards together；
The Bottom clamp plate B09 is rectangular plate-like structure, designs four in its lower surface quadrangle and sinks to the bottom through-hole；In itself and pad
Block B08 respectively designs joint three bolts hole；It is connected fastening by being located at angle screwing B10 with cushion block B08；
The cushion block B08 and Bottom clamp plate B09 is connected to a fixed by the bolt of quadrangle；The Bottom clamp plate B09, cushion block
B04, moving template B03 are connected to a fixed by foot screw B11 6 long；
The angle ejector push-out mechanism main part is made of oblique top ontology B15, tri- parts tilted footstock B14, this ontology by
Oblique top, guide rod are constituted, and cross over moving template B03, Bottom clamp plate B09, ejector pin retaining plate B07, tetra- portions push rod support plate B05
Point；Between ejector pin retaining plate structure (ejector pin retaining plate B07 and push rod support plate B05), oblique jacking guide bar connects tilted footstock B14
Connect tilted footstock and oblique top main body；Pin shaft is housed between oblique top bottom B15 and tilted footstock B14, enables oblique top B15 in tilted footstock
Rotation in B14；There is certain gap in the through-hole of oblique jacking guide bar and moving template B03, otherwise can not normally release movement；Through-hole
Among design have guide sleeve, fix oblique jacking guide bar with through-hole；
It is rectangular cubic protrusion at the top of the oblique top B15, in rectangular cubic external surface there are a groove, this is recessed
Slot is responsible for the interior buckle part of molding plastic part, after injection material injects groove, molding required interior buckle to be cooled after finishing abjection；
When the mould secondary is released, ejector pin retaining plate B07 is moved upwards together with push rod support plate B05, is reached and is released
Stop behind stroke end, in this process, thimble B12 ejects plastic under the action of ejector pin retaining plate B07 upwards, simultaneously
The symmetrical oblique top B15 in 4 centers is slided up and down in determining B03, oblique top B15 and tilted footstock B14 there are two the movement on direction,
One be oblique top B15 and T-slot sliding, one is its rotation around pin shaft.Since it is with gradient, during the motion can
One inward force is generated to electrical equipment lid itself, by the movement of this power and oblique top, separates it with plastic shaping buckle,
To successfully deviate from；
Generally speaking, moving template B03 is responsible for the structures such as series of fasteners, cooling water channel, guide post, angle ejector push-out mechanism
Carrier perforation；Ejector pin retaining plate B07 and push plate support plate B05 are responsible for plastic releasing punch-pin after dividing mould；Oblique top kickoff mechanism
Structure, which passes through the interior draft generated when two-step ejecting, separates oblique top with buckle；When the effect of guide post B02 is responsible for die sinking with molding
The accuracy of position；Reset spring B04 is responsible for the reset after plastic separation；Bottom clamp plate B09 is responsible for injector and mold sheet
Body provides support and is fastenedly connected each section by screw；
Embodiment 1
Corresponding parameter declaration is given using plastics electrical equipment lid C:
(1) such as Fig. 3, molding plastic part C size characteristic is that outer dimension is 87mm × 86mm × 7mm, and inner surface two right
Bian Youyi sections of square ladders, side length 2mm, average wall thickness 2mm, most thickness is 5mm at ladder.Have among electrical equipment lid one long
It is 8cm small rectangle inner cavity for the rectangle inner cavity of 20cm wide 8cm and four a length of 9cm wide, the depth of inner cavity is 2mm.Together
When the inside of electrical equipment lid there are four buckle, be rectangular prismatoid, buckle convex 2mm, buckle upper surface length be 5mm, following table
Face is 7mm, and buckle lower surface is to be arranged symmetrically apart from electrical equipment lid bottom 3mm, four buckles.Calculating plastic part volume according to UG is
18.5cm3 selects ABS；
(2) injector model ZYK118/SA is selected, is adopted according to its technical parameter combination clamp force and injection volume empirical equation
It is arranged with two chamber of a mould；
(3) made according to selection plastic lid bottom surface the considerations of projected area maximum principle connecting shaping component surface quality
For die joint；Forming parts are using whole insert or composite structure, material selection P20.It is made of cavity plate and punch-pin；Insert uses square
Shape insert, is fixed with screw.Female mold part insert A07 long 160mm, wide 142mm, high 28mm, insert punch-pin B01 size with
Cavity plate A07 is identical；The size for calculating molded parts, obtains D1=86.810 +0.17, D2=88.110 +0.12H1=7.130 + 0.06D1=80.670 -0.12D2=83.710 -0.12, d3=8.120 -0.09, d4=20.170 -0.12, d5=9.420 -0.09, h1=
7.120 -0.05, h2=3.240 -0.07, h3=5.190 -0.06；Wherein D1 is the cavity plate radial dimension in width direction, and D2 is length
Cavity plate radial dimension on direction, H1 are die depth size, and d1 is the radial dimension in punch-pin width direction, and d2 is that punch-pin is long
The radial dimension on direction is spent, d3 is the radial dimension of punch-pin fastening forming partial width, and d4 is that punch-pin is responsible for moulding plastics lid
Radial dimension on intermediate rectangular hole length direction, d5 are square the radial dimension on length direction, mm.
(4) it is 350mm × 400mm, top clamping plate A04 thickness that mould bases type, which is dragon note style big water gap mould bases series B × L,
80mm, solid plate A0665mm, cushion block C08 size 90mm.The diameter for taking the lead guide post B02 is 35mm, length 110mm；Guide sleeve
A05 diameter 35mm, material T10A, standard die set model C I-3540-A65-B80-C90；
(5) angle ejector push-out mechanism is used for interior buckle, is made of oblique top B15 and tilted footstock B14, Core-pulling distance 6.5mm,
Push rod support plate B05 thickness 20mm；Respectively there is a groove at oblique top both ends, and oblique top section is rectangle, side length 5mm, oblique top inclination angle
10 °, stroke 37mm is released, oblique top total length is 152.5mm.Convex block sectional dimension is identical as oblique top；Tilted footstock long 15mm, it is wide
15mm, high 30mm, T-slot width 10mm, pin groove diameter 3mm；
(6) running gate system sprue bush material selection T10A, shape are cone, and cone angle is 5 °, surface roughness RA
It is 0.8 μm；Sprue recessed radius of a ball 6mm, depth 4mm, runner segment diameter 4mm, big section diameter 4.1mm, flow channel length
67.5mm.Shape is cone, and cone angle is 5 °, and surface roughness RA is 0.8 μm；Runner length 13.1mm, diameter 8mm；Side
Cast gate, a length of 1mm, width 3mm, depth 1mm；Using the gap exhaust between part；
(7) cooling using cooling water；Cooling time 9.3s；Cooling pipe section is circle, diameter 6mm.Minimum flow rate
For 2.16m/s, mean flow rate 7.6m/s, heat transfer coefficient h=91044KJ/ (m2 × h × C).Total heat conduction area A=0.01m2,
Total length is 1.66m, and cooling water hole number is 2.Guide post B02 type is straight guide post, and guide post front end is taper, half cone angle number a
13 ° are taken as, guide post B02 and the bottom moving template B03 H7/k6 transition fit, slipper use H8/f7 clearance fit, and surface is thick
Rugosity size is Ra0.8 μm；Guide sleeve type is to take the lead guide sleeve, No. 20 steel surface quenching treatments of material selection, guide sleeve cross section face
Inside and outside and pilot hole front end rounded corner, 0.8 μm of surface roughness Ra；Taking the lead guide sleeve A05 diameter of bore is 36mm, and outer wall is straight
Diameter is 42mm, and head outside diameter is 47mm, wall thickness 3mm；Guide post and guide sleeve, which are matched, is combined into H7/m6 clearance fit；
(8) to maximum injection amount, injection pressure, clamp force, opening stroke, installation dimension (jet size, locating ring ruler
Very little, mold closure height, template size) empirically formula check and meet the requirements.
Electrical equipment lid of the present invention can be used for other daily fields such as household electrical appliance, vehicle-mounted accessory.
Claims (19)
1. plastic lid injecting molding die is buckled in specification more than, it is characterised in that it is molding by plastic injection material for manufacturing, contain
There is the plastic lid of interior buckle, needs the mold of the multiple plastic parts of one-pass molding；Including die ontology, 2 part of forming parts；Its
In:
Described its parameter of more specification moulding plastics electrical equipment lid C are as follows: being injection moulded more specification electrical equipment lid outer dimension ranges is (85-
90) mm × (87-90) mm × (7-9) mm, two opposite side of inner surface have one section of square ladder, side length 2-3mm, average wall thickness
2-2.5mm, most thickness is 5-7mm at ladder.There is the rectangle inner cavity and four of an a length of 20cm wide 8cm among electrical equipment lid
A a length of 9cm wide is 8cm small rectangle inner cavity, and the depth of inner cavity is 2mm；The inside of plastics electrical equipment lid is straight there are four buckle
Angle prismatoid buckles convex 2-3mm, and buckle upper surface length is 5-7mm, lower surface 7-9mm, buckles lower surface apart from electric appliance
Base portion 3-4mm, four buckles are to be arranged symmetrically；Pattern draft is 1.5 ° -2 °；Plastic part volume is (17-20) cm3, injection
Plastics select ABS；Number of cavity 1-4；
The die ontology structure is upright setting, including cover half part A and dynamic model part B；The cover half part is located at top,
Cover half part is located at corresponding lower part；Plastic melt is entered inside forming parts by running gate system and is cooled and shaped when molding.
The forming parts include punch insert (B01) and die plate insert (A07)；The forming parts are generally rectangle
Cube body mechanism, die joint are chosen at the bottom surface of molding plastic part；Punch-pin links together with punch insert (B01), is responsible for
Form the bottom surface portions of electrical equipment lid；Cavity plate links together with die plate insert (A07), is responsible for the summit portion of molding electrical equipment lid；
Insert is integrally respectively embedded in corresponding solid plate (A06) and moving template (B03)；Its dimensional parameters is cavity plate radial dimension
For D1=86.810 +0.17, D2=88.110 +0.12Depth dimensions are H1=7.130 +0.06 punch-pin radial dimension d1=80.670 - 0.12D2=83.710 -0.12, d3=8.120 -0.09, d4=20.170 -0.12, d5=9.420 -0.09, height dimension h1=
7.120 -0.05, h2=3.240 -0.07, h3=5.190 -0.06；
When the cover half part determines that the two separates or merges with guide sleeve (A05) by guide post (B02) with dynamic model part
Wait the accuracy of position；Guide sleeve (A05) is located at cover half part, and guide post (B02) runs through dynamic model and cover half, is fixed on dynamic model portion
Point；
When forming die sinking, guide post (B02) is moved under the guiding role of guide sleeve (A05) to underface, to make dynamic model and determine
Primary die sinking process is completed in mould separation；It is opposite when molding.
2. die ontology part according to claim 1, it is characterised in that the cover half part further comprises locating ring
(A01), nozzle cage (A02), mounting screw (A03), top clamping plate (A04), guide sleeve (A05), solid plate (A06), cavity plate, recessed
Mould insert ((A07)).
3. cover half part according to claim 2, it is characterised in that the solid plate (A06) is in rectangular cubic structure,
It is provided with the space for being equipped with die plate insert (A07) below, die plate insert (A07) is connected by 4 screws with solid plate
It is fixed；The solid plate (A06) is mutually fixed by 6 screws (A03) with top clamping plate (A04)；That is template fixing screws (A03)
Effect is fixed solid plate (A03) and top clamping plate (A04)；The centre bit above solid plate is arranged in the nozzle cage (A02)
It sets；Nozzle cage (A02) is responsible for docking injection molding machine nozzle, and injection material is made smoothly smoothly to enter mould inside by it；In solid plate
(A06) setting of right center position is there are two water hole A, B, and two water holes are perforations, along punch insert (A07) inside solid plate
Surrounding is provided with cooling water channel, which is A, exports as B；It is to keep mold using the cooling purpose of cooling water
Certain temperature range, so that shaped article quality is guaranteed；Water channel its relevant parameter in cold-zone is cooling using cooling water.It is cold
But time 9-10s.Cooling pipe section is circle, diameter 6-6.5mm.Minimum flow rate is 2.16m/s, and mean flow rate is
7.6m/s, heat transfer coefficient h=91044KJ/ (m2 × h × C)；Total heat conduction area A=0.01m2, total length 1.65-1.68m,
Cooling water hole number is 2；It is exhausted by the way of the gap exhaust between part.
4. cover half part according to claim 2, it is characterised in that the guide sleeve (A05) is arranged by force fit
In the through-hole of the solid plate quadrangle, the effect of guide column sleeve (A05) is to reduce friction, keeps guide post smoother when moving up and down；
Its respective detailed parameters are as follows: guide sleeve type is to take the lead guide sleeve, No. 20 steel surfaces quenching treatments of material selection, guide sleeve end face it is inside and outside with
And the front end rounded corner of pilot hole, 0.8 μm of surface roughness Ra.Taking the lead guide sleeve diameter of bore is 36-37mm, and outer diameter is
41-43mm, head outside diameter are 46-48mm, wall thickness 2.8-3.2mm.Guide post and guide sleeve, which are matched, is combined into H7/m6 clearance fit.
5. cover half part according to claim 2, it is characterised in that the top clamping plate (A04) is rectangular plate-like knot
A countersunk head through-hole is arranged in structure, center, is used to placement positioning circle (A01), is annular flange dish structure, passes through two screws
It is fastenedly connected with top clamping plate；That is the effect of screw is to be fixed on locating ring (A01) on top clamping plate (A04)；Top clamping plate
(A04) effect is to be embedded with die plate insert ((A07)) below, while matching with injector pressing plate, and injector is enable to exist
There is stress object when injection, so that injection process is steady.
6. the dynamic model part according to claim 1, it is characterised in that it further comprises punch insert (B01), guide post
(B02), moving template (B03), reset spring (B04), push rod support plate (B05), screw (B06), ejector pin retaining plate (B07), pad
Block (B08), Bottom clamp plate (B09), screw (B10), screw (B11), thimble (B12), sprue puller (B13), angle ejector push-out mechanism
(B14), (B15).
7. dynamic model part according to claim 6, it is characterised in that moving template (B03) the generally rectangular cubic
Mechanism, top are embedded with punch insert (B01), and punch insert (B01) is connected to a fixed by 4 screws with moving template；At it
Front and rear sides side is respectively set there are two through-hole, and upper surface is circular through hole, and lower surface is to sink to the bottom through-hole, is responsible for installation and resets bullet
Spring (B04)；In the setting of its surrounding, there are four through-holes, are responsible for installation guide post (B02)；It is provided with 8 oblique through holes inside it, this is logical
Hole cross section is rectangle, and tilt angle is 12 °, for assembling oblique top；In its left and right, two parts center is each provided with 5 circular tops
Needle through-hole, for assembling thimble；One through-hole is set in its position of centre of gravity, for assembling sprue puller (B13).
8. dynamic model part according to claim 7, guide post (B02) described in feature is that guide post type is straight guide post,
Guide post front end is taper, and half cone angle number a is taken as 13 °, and guide post and support plate bottom H7/k6 transition fit, slipper use
H8/f7 clearance fit, surface roughness size are Ra0.8 μm, guide post diameter 35mm, and guide post length is 95mm, material selection
T10A surface hardening processing.
9. dynamic model part according to claim 6, it is characterised in that moving template (B03) the right center position setting
There are two water hole C, D, two water holes are perforations, are provided with cooling around punch insert (B01) in active and inactive mold plate (B03) inside
Water channel, the cooling water channel import are C, are exported as D；Four upright guides (B02) are respectively set in moving template (B03) surrounding,
The upright guides (B02) are matched with the guide column sleeve (A05) on solid plate (A06), and when being opened or molding, which exists
Vertical movement up and down in guide column sleeve (A05).
10. dynamic model part according to claim 6, it is characterised in that push rod support plate (B05) the generally rectangle
Plate structure；At the two-part respective center in its left and right, 8 thimble through-holes are respectively set.
11. dynamic model part according to claim 6, it is characterised in that the reset spring (B04) and its spring guide pillar
(B16) the corresponding guide post top (B16) is discoid, and rest part is cylindrical body；Top is in contact with ejector pin retaining plate, remaining part
Divide through push rod support plate (B05) through-hole through reset spring (B04) into moving template spring guide pillar through-hole；Spring guide pillar is respectively pacified
Equipped with a reset spring (B04)；The effect of spring guide pillar (B16) is to shrink spring in defined vertical direction；It is multiple
The effect of position spring (B04) is to reset mold after the completion of two-step ejecting.
12. dynamic model part according to claim 6, it is characterised in that cushion block (B08) the generally rectangular cubic
Structure designs three through-holes in its height direction；The effect of cushion block (B08) is that a rectangular space is formed between the two,
Necessary possibility is provided for two-step ejecting.
13. dynamic model part according to claim 6, it is characterised in that the lower surface push rod support plate (B05) surrounding
It is each that there are four sink to the bottom through-hole；Push rod support plate (B05) is connected to a fixed by fixed screw (B06) with ejector pin retaining plate (B07)；
I.e. fixed screw is connected as one ejector pin retaining plate (B07) with push rod support plate (B05), can be together at two cushion blocks (B08)
Between space in move up and down；
Due to the presence of cushion block (B08) between the ejector pin retaining plate (B07) and push rod support plate (B05) and moving template (B03)
A rectangular space is generated, so that reset spring (B04) can be compressed in this space, so that push rod support plate (B05)
Plate (B07) is secured to move upwards together.
14. dynamic model part according to claim 6, it is characterised in that the Bottom clamp plate (B09) is rectangular plate-like knot
Structure designs four in its lower surface quadrangle and sinks to the bottom through-hole；Three bolts hole are respectively designed with the joint cushion block (B08) at it；It is logical
It crosses and is located at angle screwing (B10) and is connected with cushion block (B08) fastening.
15. dynamic model part according to claim 6, it is characterised in that the cushion block (B08) and Bottom clamp plate (B09) is logical
The bolt for crossing quadrangle is connected to a fixed；The Bottom clamp plate (B09), cushion block (B04), moving template (B03) pass through 6 long foot screw
(B11) it is connected to a fixed.
16. dynamic model part according to claim 6, it is characterised in that the angle ejector push-out mechanism main part is by oblique top
Ontology (B15), the part of tilted footstock (B14) three form, this ontology is made of oblique top, guide rod, across moving template (B03),
Four Bottom clamp plate (B09), ejector pin retaining plate (B07), push rod support plate (B05) parts；Tilted footstock (B14) is fixed embedded in push rod
Between hardened structure (ejector pin retaining plate (B07) and push rod support plate (B05)), oblique jacking guide bar connects tilted footstock and oblique top main body；
Pin shaft is housed between oblique top bottom (B15) and tilted footstock (B14), makes oblique top (B15) being capable of the rotation in tilted footstock (B14)；Tiltedly
There is certain gap in the through-hole of top guide rod and moving template (B03), otherwise can not normally release movement；There is design among through-hole
Guide sleeve fixes oblique jacking guide bar with through-hole；Its relevant parameter is that Core-pulling distance is (6.5-8) mm, upper ejector plate thickness
(18-22)mm.Respectively there is a groove at oblique top both ends, and oblique top section is rectangle, side length 5--7mm, if oblique top inclination angles mistake
Greatly, the moment of flexure for bearing oblique top is excessive, on the other hand Core-pulling distance is increased, and taking it here is 10 ° -12 °, releases
Stroke 35-40mm, oblique top total length are 150-165mm.Convex block sectional dimension is identical as oblique top.Tilted footstock long 13-18mm, it is wide
13-18mm, high 30mm, T-slot width 8-12mm, pin groove diameter 2-4mm.
17. dynamic model part according to claim 16, it is characterised in that its top of the oblique top (B15) is that a rectangle is vertical
Cube protrusion, in rectangular cubic external surface there are a groove, this groove is responsible for buckling part in molding plastic part, works as injection
After expecting injection groove, molding required interior buckle to be cooled after finishing abjection；
When the mould secondary is released, ejector pin retaining plate (B07) moves upwards together with push rod support plate (B05), reaches and releases
Stop behind stroke end, in this process, thimble (B12) ejects plastic under the action of ejector pin retaining plate (B07) upwards,
4 symmetrical oblique tops in center (B15) slide up and down in fixed (B03) simultaneously, and there are two oblique top (B15) and tilted footstock (B14)
Movement on direction, one be oblique top (B15) and T-slot sliding, one is its rotation around pin shaft.Since it has tiltedly
Degree, an inward force can be generated to electrical equipment lid itself during the motion, by the movement of this power and oblique top, make its with
Plastic shaping buckle separation, to successfully deviate from.
18. dynamic model part according to claim 6, it is characterised in that the moving template (B03) is responsible for a series of fastenings
The isostructural carrier perforation of part, cooling water channel, guide post, angle ejector push-out mechanism；Ejector pin retaining plate (B07) and push plate support plate
(B05) it is responsible for plastic releasing punch-pin after dividing mould；Angle ejector push-out mechanism, which passes through the interior draft generated when two-step ejecting, makes oblique top
It is separated with buckle；The effect of guide post (B02) is responsible for the accuracy of die sinking with position when molding；Reset spring (B04) is responsible for modeling
Reset after part separation；Bottom clamp plate (B09) is responsible for providing support to injector and die ontology and makes each portion by screw
Divide and is fastenedly connected.
19. mold according to claim 1, it is characterised in that the sprue bush material selection of the running gate system
T10A, shape are cone, and cone angle is 5 °, and surface roughness RA is 0.8 μm.Sprue recessed radius of a ball 6-7mm, depth 4-5mm,
Runner segment diameter 3.9-4.1mm, big section diameter 4.1-4.15mm, flow channel length 67-68mm.Shape is cone, and cone angle is
5-6 °, surface roughness RA is 0.8 μm.Runner length 13-14mm, diameter 8-8.5mm.Side gate, a length of 1mm, width are
3mm, depth 1mm.Using the gap exhaust between part.
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| CN201910037816.4A CN109483825B (en) | 2019-01-15 | 2019-01-15 | Multi-specification inner buckle plastic cover injection molding die |
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| CN201910037816.4A CN109483825B (en) | 2019-01-15 | 2019-01-15 | Multi-specification inner buckle plastic cover injection molding die |
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| CN109483825B (en) | 2020-10-16 |
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