CN106985352B - A kind of classification core pulling method of injection mold - Google Patents
A kind of classification core pulling method of injection mold Download PDFInfo
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- CN106985352B CN106985352B CN201710241626.5A CN201710241626A CN106985352B CN 106985352 B CN106985352 B CN 106985352B CN 201710241626 A CN201710241626 A CN 201710241626A CN 106985352 B CN106985352 B CN 106985352B
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- core
- core pulling
- pulling
- pulling type
- cover half
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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
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- 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
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
Abstract
The invention discloses a kind of classification core pulling methods of injection mold, when dividing mould, core pulling oil cylinder drives a level-one core-pulling slide block being slidably connected in secondary core extracting sliding block to slide backward, and level-one core-pulling slide block then drives the core pulling core barrel being slidably connected with it to draw back, to complete level-one core pulling；Core pulling oil cylinder continues to act, to pull secondary core extracting sliding block to retreat by level-one core-pulling slide block, and then completes secondary core extracting；Then product is ejected from dynamic model；Core pulling oil cylinder counteragent makes level-one core-pulling slide block forward slip, and then drives core pulling core barrel to the forming ends for moving forward and stretching out secondary core extracting sliding block；Core pulling oil cylinder continues to act, so that secondary core extracting sliding block and the synchronous Forward of core pulling type core be driven to reset, can start the injection molding of next product at this time.The present invention can not only simplify mould structure, adapt to the same lateral side core-pulling having in shape there are two any direction on product, and can avoid the retrogressing of core pulling type core and sliding block.
Description
Technical field
The present invention relates to injection mold technologies, more particularly, to a kind of classification core pulling method of injection mold.
Background technique
Plastic cement products are very universal in production and daily life, and wherein injection molding is then most commonly seen one
Kind plasthetics molding mode, generally includes the cover half on the upside of die joint, the dynamic model on the downside of die joint and top plate etc., wherein
Cover half be equipped with sprue bush, be respectively equipped with forming part corresponding with the upper and lower surfaces of product on fixed half and moving half.For
Product after molding is set to rest on dynamic model side, the forming part on usual cover half is corresponding with the shape of product type chamber,
And the forming part on dynamic model is type core corresponding with the inner cavity of product.The forming method of existing injecting products is generally as follows: will
Injection mold is fixed on injection molding machine, and then the injection head of injection molding machine projects the molten plastic cement of high pressure, and plastic cement passes through cover half
Enter in the molding cavity being made of type chamber and type core into running channel, become product after cooling, then dynamic model, top plate etc. are opposite
Cover half is mobile and divides mould, and molding product is rested on because of cooling meat on the type core of dynamic model, and top plate acts at this time, drives mandril
From ejecting product on type core, product can be removed, to complete single injection-molded.
When the product of injection molding is with lateral shapes such as sidewise hole, the slots with parting direction with angle, need
Corresponding core-pulling mechanism is set on mold, will be used to form lateral shape to pass through core-pulling mechanism in mold parting after molding
The type core of shape is extracted out in advance, to facilitate the separation of dynamic model and cover half, lateral molding type core is avoided to go out to be molded as to product
Interference.Core-pulling mechanism is usually to pass through the hydraulic mechanisms driving side such as the mechanical structures such as inclined guide pillar, angled-lift splits or hydraulic cylinder
It is displaced sideways to molding type core, sliding block etc., to realize side core-pulling.When in the lateral shape on product simultaneously have with
When the different sidewise hole slot structure in the core pulling direction of lateral shape, then need to be arranged two sets of side core-drawing mechanisms.For example, one kind exists
In Chinese patent literature disclosed " coring device in sliding block of injection mold ", publication No. CN102248641A is specific to wrap
It includes lateral core-pulling slide block, longitudinal core-pulling slide block, spring, affect bar, release link, longitudinal direction core-pulling slide block therein is arranged in lateral pumping
In core sliding block.What the mould structure was suitble to is to have the product of longitudinal hole slot simultaneously in lateral hole slot, mold when being opened, if
The longitudinal core-pulling slide block set in lateral core-pulling slide block first acts, and realizes longitudinal core pulling, when to avoid the movement of lateral core-pulling slide block
Longitudinal core-pulling slide block causes to interfere to product；Then lateral core-pulling slide block movement, realizes lateral core pulling, so that product can be realized
The core pulling of both direction in length and breadth.
However, using the forming method of above-mentioned core-pulling mechanism, there are the following problems, due to the longitudinal direction in two core-pulling mechanisms
Core-pulling slide block is to be driven by longitudinally arranged draw bar, and draw bar itself is by spring driven, although having letter
The advantages of changing structure, but spring driven core pulling action is easy failure, it, can be greatly if the elastic force design of spring is excessive
Increase resistance when resetting, causes to reset difficult.In addition, its longitudinal core pulling direction of core-pulling slide block and the parting direction one of mold
It causes, therefore, when the hole in the lateral shape for need on product side core-pulling with the parting direction shape with mold in an angle
When slot, above-mentioned core-pulling device will be unable to realize the classification core pulling of product.
Summary of the invention
The purpose of the present invention is to solve core pulling actions present in existing injection mold classification pulled core structure to be easy
Resistance when failure, reset is big, and the longitudinal core pulling and mold parting direction that are unable to satisfy in classification core pulling have a folder
The problem of requirement at angle, provides a kind of classification core pulling method of injection mold, improves the stability of classification core pulling with both having can dramatically
And reliability, reset resistance is greatly reduced, while being able to satisfy the classification core pulling requirement with inclined longitudinal core pulling.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of classification core pulling method of injection mold, includes the following steps:
A. after in the mold cavity in molding state full of plastic cement simultaneously cooling and shaping, dynamic model retrogressing is separated with cover half,
Core pulling pull rod on cover half catches on the tail end of the core pulling type core of the inclination hole slot in the lateral shape for shaped article, core pulling type
Core is obliquely axially moved back in the inclined pilot hole of the core-pulling slide block of the lateral shape for shaped article by shaping position,
The forming ends of core pulling type core exit the inclination hole slot of product and retract in pilot hole, to complete the level-one core pulling of product, at this time
Core pulling type core tail end simultaneously generate a lateral displacement；
B. when dynamic model retreats in place, the travel switch of a control core pulling oil cylinder is touched, at this time the tail end of core pulling type core
It is detached from core pulling pull rod and is in the first de-molding position；
C. core pulling cylinder action, so that core-pulling slide block be driven to slide backward, the forming ends of core-pulling slide block and product it is lateral
Shape separation, to complete secondary core extracting, the core pulling type core rested in core-pulling slide block at this time follows core-pulling slide block to be moved to the
Two de-molding positions；
D. the ejecting mechanism movement of mold, product is ejected from dynamic model, pickup can be completed from mold；
E. core pulling oil cylinder counteragent rests on the core pulling type in core-pulling slide block to drive core-pulling slide block forward slip
Core follows core-pulling slide block to be reset to the first de-molding position；
F. dynamic model Forward is molded with cover half, and cover half contacts a locking surface on core pulling type core, and core pulling type core is sliding in core pulling
The inclined pilot hole of block moves forward internally reset, and the forming ends of core pulling type core stretch out pilot hole, and the tail end of core pulling type core generates one simultaneously
A lateral displacement and gradually close to core pulling pull rod；
G. dynamic model contacts with cover half and completes molding, and core pulling type core is reset to shaping position, and core pulling pull rod catches on core pulling type
The tail end of core can start the injection molding of next product.
The present invention is obliquely installed a slidable core pulling type in the core-pulling slide block for the lateral shape of shaped article
Core, and on cover half be arranged one can hooking core pulling type core core pulling pull rod.In this way, when dynamic, cover half starts point mould, core pulling
Pull rod can catch on core pulling type core and realize level-one core pulling, so that core pulling type core be enable reliably to divide mould, avoid driving core pulling with spring
The movement failure that type core core pulling is easy to appear improves the stability and reliability of classification core pulling significantly, greatly reduces reset
Resistance, while being able to satisfy the classification core pulling requirement with inclined longitudinal core pulling.In particular, the present invention dexterously utilizes core pulling type
The tilt angle of core itself, so that core pulling type core forms a lateral displacement in core pulling, in this way, when core pulling type core completes core pulling
When, core pulling pull rod can divide mould with the tail end reliable separation of core pulling type core so as to dynamic model and cover half.And move, cover half molding when,
Pushing by cover half to the locking surface of core pulling type core, make core pulling type core reset and again with core pulling pull rod phase hooking.
Preferably, the core pulling pull rod includes the straight-bar being fixedly connected with cover half and is extended by the end bending of straight-bar
The drag hook of composition, to keep core pulling pull rod L-shaped, the outer ledge of the side on the drag hook for hooking core pulling type core is equipped with
Chamfering extends to the hooking inclined-plane of straight-bar to form one and slope inwardly, and the tail end of the core pulling type core is equipped with lateral convex block,
The lateral convex block is equipped with sliding bevel corresponding with hooking inclined-plane, and when dynamic model is in molding state with cover half, hooking is oblique
Face fits with sliding bevel, and locking surface is bonded with cover half；When dynamic model and cover half divide the drag hook of mould, core pulling pull rod to catch on core pulling type
When the lateral convex block of core tail end is to make core pulling type core move back in pilot hole, the sliding bevel of core pulling type core along drag hook hook
Inclined-plane sliding is hung, on the one hand core pulling type core at this time forms a lateral displacement, a length travel is on the other hand formed, thus
Make sliding bevel from hooking inclined-plane close to the medial movement of straight-bar to the outside of separate straight-bar, and core pulling type core is with respect to dynamic model
Length travel be less than length travel of the cover half with respect to dynamic model, locking surface separates with cover half.
L-shaped core pulling pull rod facilitates processing, and ensures the reliability of hooking.It is known that in molding state, cover half and pumping
What the locking surface of core pattern core made to fit closely, so as to locking core pulling type core, core pulling type core is avoided to retreat at the time of molding.Present invention wound
The property made an inclined hooking inclined-plane is set at the drag hook of core pulling pull rod, in this way, when dynamic model, cover half start point mould, one
Aspect can make hooking inclined-plane and the moving direction of core pulling type core close to vertical, thus the pumping for keeping core pulling type core suffered in core pulling
The active force of core pull rod and the moving direction of core pulling type core are consistent substantially, so that lateral turn round will not be generated to core pulling type core
Square is conducive to the smooth movement of core pulling type core, and core pulling type core is avoided stuck phenomenon occur because of sideway torque.On the other hand, by
It is to be sticked on hooking inclined-plane always, and core pulling type core is with respect to core pulling pull rod during core pulling in the tail portion of core pulling type core
A lateral displacement is had, therefore, core pulling type core tail portion and the contact position on hooking inclined-plane can be varied, to make core pulling type
Length travel of the core with respect to dynamic model is less than length travel of the cover half with respect to dynamic model.Therefore, core pulling type core has one with respect to cover half
Length travel makes core pulling type core that can leave cover half when starting core pulling and no longer keeps being in close contact.On the contrary, when molding
When, the drag hook of core pulling pull rod first crosses the lateral convex block of core pulling type core tail end, and then the locking surface of core pulling type core is contacted with cover half,
To drive core pulling type core to reset, core pulling type core at this time has a lateral displacement, when core pulling type core resets completely, core pulling
The sliding bevel of the lateral convex block of type core tail end is just bonded with the hooking inclined-plane on the drag hook of core pulling pull rod, that is to say, that is hooked
The lateral displacement that hanging inclined-plane makes core pulling type core can avoid core pulling type core during entire core pulling causes between locking surface and cover half
Friction and sliding bevel and hooking inclined-plane between friction, thus greatly reduce when core pulling type core core pulling friction resistance
Power, it is advantageously ensured that the smooth progress of level-one core pulling.
Preferably, being equipped with the guide groove with pilot hole side by side on core-pulling slide block, the core pulling core package is included to be located at and be led
Core pulling ontology into hole and the gib block for being provided integrally at core pulling ontology side, gib block are slidably connected at guide groove
Interior, gib block is equipped with guide through hole, and guiding groove bottom is equipped with the limited post extended along the glide direction of core pulling type core, limited post
The outer end for being slideably pierced by guide through hole is equipped with limited cap, and core pulling spring is arranged on the limited post in guide groove, takes out
Core spring one end compresses guiding groove bottom, and the other end compresses gib block, when dynamic model and cover half divide the drag hook of mould, core pulling pull rod to catch on
When core pulling type core tail end is to make the forming ends of core pulling type core exit the inclination hole slot of product, core pulling spring driving gib block is being led
It is fast moved into slot, and then core pulling type core is made quickly to reach the first de-molding position.
The present invention is in the gib block for molding core pulling ontology side setting one, in order to which corresponding limited post is arranged
With core pulling spring.In this way, in level-one core pulling, when core pulling pull rod, which catches on core pulling type core, to be extracted out from the side of product into hole slot,
Core pulling spring can drive core pulling type core rapidly to move back by gib block, separate core pulling type core with core pulling pull rod and reduce and rub
It wipes, what limited post then can accurately limit core pulling type core moves back distance, and core pulling type core is made accurately and reliably to be located in the first demoulding
Position, and enough evaded distances are horizontally formed between core pulling pull rod and core pulling type core in molding, to avoid molding
When core pulling pull rod and the tail end of core pulling type core between generate interference and collision.
Turn in the U-shaped opening of button preferably, the tail end of the core pulling ontology is rotatably connected on a U-shaped, core-pulling slide block
Limit sliding chutes are equipped with, the outside that U-shaped turns button is equipped with the sliding rail being slidably connected in limit sliding chutes, and U-shaped turns to detain far from U-shaped opening
Side be equipped with and reset opening, the upside for resetting opening is core pulling side, reset the downside of opening to reset side, when dynamic model with
When cover half is in molding state, the drag hook of core pulling pull rod is located at U-shaped and turns in the reset buckled opening, and sliding rail is located in limit sliding chutes,
U-shaped at this time turns buckle in hooking position；When dynamic model retrogressing is separated with cover half, drag hook catches on the core pulling side for resetting opening, U
Shape turns button and drives core pulling core barrel to move back by gib block；The inclination hole slot of product is exited when the forming ends of core pulling type core and
When retracting in pilot hole, sliding rail skids off limit sliding chutes, and core pulling type core is limited cap limit, and U-shaped turns button and rotates forward to disengagement position
It sets, drag hook abjection U-shaped turns the reset buckled opening；When dynamic model Forward is molded with cover half, drag hook first contacts the reset for resetting opening
Side makes U-shaped turn button reverse flip to hooking position, and drag hook at this time, which is located at, to be resetted in opening, and the sliding rail that U-shaped turns button is directed at limit
Position sliding slot, then drag hook turns to buckle by U-shaped pushes core pulling type core to move forward internally in pilot hole；When dynamic model is moved to the lock of core pulling type core
When only face and cover half contact, core pulling type core moves forward internally reset in pilot hole.
It is known that when the forming ends of core pulling type core are deviate from from the side of product into hole slot, the drag hook of core pulling pull rod with
Certain exposure should be kept between the tail end of core pulling type core, so that it is one section mobile to make core pulling pull rod that can pull on core pulling type core
Distance, to ensure the success of level-one core pulling.When the angle between the core pulling direction of core pulling type core and the longitudinal direction of mold is smaller, on
Stating moving distance can be longer, to will increase the length of entire core pulling type core, and then increases core-pulling slide block or even entire mold
Size.The present invention is creatively arranged a rotatable U-shaped in the tail end of gib block and turns button, and in the state of molding, U-shaped turns button
On sliding rail be located in the limit sliding chutes of core-pulling slide block, U-shaped at this time, which turns button, to be rotated, and therefore, core pulling pull rod can catch on U-shaped
Turn the reset opening of button, so that gib block and core pulling type core be driven to carry out level-one core pulling.When core pulling type core from the side of product to
In hole slot when extraction, sliding rail skids off limit sliding chutes, and U-shaped turn button at this time is i.e. free to rotate, thus the drawing with core pulling pull rod
Hook abjection.When the die is closed, drag hook can touch the reset opening of the new transit of U again, so that so that U-shaped is turned button reversion sets hooking position, this
When core pulling pull rod gib block Forward can be pushed to reset, U-shaped turns the limit sliding chutes that the sliding rail buckled reenters core-pulling slide block
It is interior.That is, the present invention deviates to stop moving into hole slot from the side of product in the forming ends one of core pulling type core, thus
The size of core pulling type core, core-pulling slide block and mold can greatly be shortened, in particular, rotatable U-shaped, which turns button, effectively to be kept away
Exempt to generate interference and collision when resetting between core pulling pull rod and core pulling type core.
Preferably, turning to be equipped with positioning torsional spring and rotary position limiting structure between button and gib block tail end in U-shaped, when core pulling type
The forming ends of core exit the inclination hole slot of product and retract in pilot hole, when sliding rail skids off limit sliding chutes, and positioning torsional spring drives U-shaped
Turn button to rotate forward, rotary position limiting structure makes U-shaped turn button be located in disengaged position；When dynamic model Forward is molded with cover half, drag hook
First contacting the reset side for resetting and being open makes U-shaped turn button reverse flip, and rotary position limiting structure makes U-shaped turn button be located in hooking position
It sets.
Reliable location when positioning torsional spring can make U-shaped turn to be buckled in rotation, the drag hook for being conducive to core pulling pull rod when molding enter again
In the opening of position.
Therefore, the invention has the following beneficial effects: improve classification core pulling stability and reliability with both can dramatically, poles
The earth, which reduces, resets resistance, while being able to satisfy the classification core pulling requirement with inclined longitudinal core pulling.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the attachment structure schematic diagram of the core-pulling slide block and core pulling type core in Fig. 1.
Fig. 3 is a kind of structural schematic diagram of the embodiment of the present invention 2.
Fig. 4 is the attachment structure schematic diagram of 3 core-pulling slide block and core pulling type core in figure.
Fig. 5 is that U-shaped turns at hooking position and the attachment structure schematic diagram of core pulling pull rod.
Fig. 6 is that U-shaped turns in disengaged position and the attachment structure schematic diagram of core pulling pull rod.
In figure: 1, cover half 2, dynamic model 21, moving template 22, dynamic model pressing plate 23, top plate 231, mandril 3, pumping
Core pull rod 31, drag hook 321, hooks inclined-plane 4, core pulling type core 41, lateral convex block 411, sliding bevel at straight-bar 32
42, locking surface 43, gib block 431, guide through hole 44, core pulling ontology 45, spacer pin 5, core-pulling slide block 51, lead
Turn to buckle to hole 52, guide groove 521, limited post 522, limited cap 523, core pulling spring 53, limit sliding chutes 6, U-shaped
61, sliding rail 62, core pulling side 63, reset side 64, arc groove 65；Raised line 7, core pulling oil cylinder.
Specific embodiment
The present invention will be further described with specific embodiment with reference to the accompanying drawing.
The classification core pulling method of injection mold of the invention is suitable in the lateral shape for needing side core-pulling while having
The product of the lateral hole slot of side core-pulling in need, and the core pulling direction of lateral shape and the core pulling direction of lateral hole slot are different
Cause, that is to say, that type core for forming the big sliding block of lateral shape and for forming lateral hole slot or small slide block need along
Different direction core pullings, and the type core or small slide block core pulling that need first to make to form lateral hole slot and separated with product, then
It can make big slipper block loose core, to avoid in big slipper block loose core and still remain in the type core or small slide block in the lateral hole slot of product
Generate Xiang Hu Gan Wataru.
As shown in Figure 1, injection mold of the invention includes the cover half 1 on top, the dynamic model 2 of lower part and setting in dynamic model one
The ejecting mechanism of side, setting forming part corresponding with the upper surface of product on cover half, the downside of cover half is with a die joint.It is dynamic
Mould then includes moving template 21 and the dynamic model pressing plate 22 being arranged in below moving template, the lower surface of setting and product on moving template
The upside of corresponding forming part, moving template has a die joint.In addition, the setting left and right two between moving template and dynamic model pressing plate
Top plate 23 is arranged in the ejection space, the forming part of moving template is corresponded on top plate to constitute an ejection space for a feet
Several mandrils 231 are arranged in position, so that ejecting mechanism is formed, so as to the ejecting product after formed product divides mould.In the present embodiment,
Cover half side is known as upside by us, and dynamic model side is known as downside, and correspondingly, the moving direction of dynamic model is up and down when dividing mould
Direction, or be longitudinal, and the correspondingly definition left and right sides or laterally, when mold on horizontal injection molding machine in use, on
Lower direction is horizontal direction.Since the essential structure of injection forming mold belongs to the state of the art, do not did herein
More descriptions.
The present embodiment it is targeted be that core-pulling mechanism needs that the product of dynamic model side is arranged in, accordingly, it is desirable to which pumping is arranged
Core sliding block 5 and core pulling type core 4, with needed on shaped article side core-pulling lateral shape and lateral hole slot, specifically,
Following method can be used when formed product and realize classification core pulling.
Embodiment 1: a kind of classification core pulling method of injection mold includes the following steps:
A. when the plastic cement in the mold cavity in molding state full of molten and after cooling and shaping, dynamic model retreat with
Cover half separates, and the tail end of core pulling type core is caught in the lower end of the vertical core pulling pull rod 3 of one be fixed on cover half, makes core pulling
Type core is obliquely axially moved back in the inclined pilot hole 51 of core-pulling slide block by shaping position, core-pulling slide block therein be used at
The lateral shape of type product, core pulling type core are then used for the inclination hole slot in the lateral shape of shaped article, and core-pulling slide block and
The core pulling direction of core pulling type core is inconsistent.When the forming ends of core pulling type core front end exit the inclination hole slot of product and retract pilot hole
When interior, that is, the level-one core pulling of product is completed, at this time on the one hand the tail end of the core pulling type core of inclination movement forms a length travel,
A lateral displacement is generated simultaneously.As shown in Fig. 2, core pulling pull rod of the invention includes being fixedly connected with cover half and towards dynamic model one
The straight-bar 31 and the drag hook 32 constituted is extended by the bending of the end of straight-bar that side longitudinally extends, to keep core pulling pull rod L-shaped.Phase
Ying Di, the lateral convex block 41 of the tail end setting one of core pulling type core, the drag hook of core pulling pull rod are hooked on the lateral convex of core pulling type core
On block.In addition, cover half contacts core pulling when molding state with the locking surface 42 of a transverse direction, dynamic model and cover half on core pulling type core
Locking surface on type core, so that locking core pulling type core, avoids core pulling type core from retreating at the time of molding.It should be noted that this implementation
Molding one end will be used in core-pulling slide block, core pulling type core in example and be defined as front end, and correspondingly define rear end and two sides.
In order to reduce friction of the locking surface of core pulling type core in core pulling type core lateral displacement between cover half, we can be
Chamfering is arranged in outer ledge on drag hook for the lateral convex block of hooking core pulling type core, extends to form an inward slant
Sliding bevel 411 corresponding with hooking inclined-plane is correspondingly arranged on lateral convex block for the hooking inclined-plane 321 of straight-bar, when dynamic model with calmly
When mould is in molding state, hooking inclined-plane fits with sliding bevel, and locking surface is bonded with cover half；When dynamic model and cover half divide mould,
When the drag hook of core pulling pull rod catches on the lateral convex block of core pulling type core tail end to make core pulling type core move back in pilot hole, core pulling type
Sliding bevel on the lateral convex block of core is slided along the hooking inclined-plane of drag hook, on the one hand core pulling type core at this time forms a cross
To displacement, a length travel is on the other hand formed, medial movement of the sliding bevel from hooking inclined-plane close to straight-bar is far from
The outside of straight-bar, that is to say, that core pulling type core cannot keep synchronizing moving with core pulling pull rod in the longitudinal direction, to make core pulling type core
The length travel of opposite dynamic model is less than length travel of the cover half with respect to dynamic model, therefore, when dynamic model and cover half start separated, core pulling
The locking surface of type core is separated with cover half immediately, generates friction so as to be effectively prevented from the sword of locking surface and cover half；
B. when dynamic model retreats in place, the travel switch of a control core pulling oil cylinder 7 is touched, at this time the tail of core pulling type core
End is detached from core pulling pull rod and is in the first de-molding position.In order to reduce the friction between core pulling pull rod and core pulling type core, we
Can be arranged on core-pulling slide block with the guide groove 52 of pilot hole side by side, correspondingly, core pulling core package is included for molding core pulling sheet
Body 44 and the gib block 43 for being provided integrally at core pulling ontology side, core pulling ontology are located in pilot hole, and gib block sliding connects
It connects in guide groove, and the tail end of core pulling ontology is then arranged in lateral convex block.In addition, on gib block setting axially extend lead
To through-hole 431, it is oriented to the limited post 521 that groove bottom setting extends along the glide direction of core pulling type core, limited post is slideably worn
It is located in guide through hole, a limited cap 522, the limit in guide groove is arranged in the outer end that guide through hole is pierced by guide post
A core pulling spring 523 is arranged on column, core pulling spring one end compresses guiding groove bottom, and the other end compresses gib block.In this way, when dynamic
Mould divides mould with cover half, the drag hook of core pulling pull rod catches on core pulling type core tail end to make the forming ends of core pulling type core exit inclining for product
When inclined hole slot, the Bao Moli moment of core pulling type core is eliminated, and core pulling spring can be driven gib block and quickly move in guide groove at this time
It is dynamic, and then separate the lateral convex block of core pulling type core mutually with the drag hook of core pulling pull rod, core pulling type core quickly reaches the first demoulding position
It sets, and passes through limited cap accurate limit.That is, only to play a driving core pulling type core fast for core pulling spring in the present invention
Fast movement and the effect separated with core pulling pull rod, and power required when core pulling type core core pulling then comes from core pulling pull rod, therefore takes out
Elastic force needed for core spring is smaller, and correspondingly, the elastic force of core pulling type core required core pulling spring overcome when resetting is also smaller.When
So, counterbore is respectively set in the both ends that we can be located at guide through hole on gib block, to make core pulling spring and limited cap that can divide
It Xian Wei not be in two counterbores；
C. core pulling cylinder action, so that core-pulling slide block be driven to slide backward, the forming ends of core-pulling slide block and product it is lateral
Shape separation, to complete secondary core extracting, the core pulling type core rested in core-pulling slide block at this time follows core-pulling slide block to be moved to the
Two de-molding positions；
D. the ejecting mechanism movement of mold, product is ejected from dynamic model, pickup can be completed from mold, thus complete
At the molding of a product；
E. core pulling oil cylinder counteragent, piston rod forward extend out, to drive core-pulling slide block forward slip, rest on
Core pulling type core in core-pulling slide block follows core-pulling slide block to be reset to the first de-molding position；
F. dynamic model Forward is molded with cover half, and cover half contacts a locking surface on core pulling type core, and core pulling type core is sliding in core pulling
The inclined pilot hole of block moves forward internally reset, and the forming ends of core pulling type core stretch out pilot hole, and the tail end of core pulling type core generates one simultaneously
A lateral displacement and gradually close to core pulling pull rod；
G. dynamic model contacts with cover half and completes molding, and core pulling type core is reset to shaping position, and core pulling pull rod catches on core pulling type
The tail end of core can start the injection molding of next product.
Embodiment 2: as shown in Figure 3, Figure 4, a kind of classification core pulling method of injection mold includes the following steps:
A. when the plastic cement in the mold cavity in molding state full of molten and after cooling and shaping, dynamic model 2 retreat with
Cover half 1 separates, and the tail end of core pulling type core 4 is caught in the lower end of the vertical core pulling pull rod 3 of one be fixed on cover half, makes to take out
Core pattern core is obliquely axially moved back in the inclined pilot hole 51 of core-pulling slide block 5 by shaping position.When core pulling type core front end
When forming ends exit the inclination hole slot of product and retract in pilot hole, that is, the level-one core pulling of product is completed, at this time inclination movement
On the one hand the tail end of core pulling type core forms a length travel, while generating a lateral displacement.Core pulling pull rod includes and cover half
It is fixedly connected and the straight-bar 31 that longitudinally extends towards dynamic model side and the drag hook 32 constituted is extended by the bending of the end of straight-bar, from
And keep core pulling pull rod L-shaped.In addition, when molding state with the locking surface 42 of a transverse direction, dynamic model and cover half on core pulling type core,
Cover half contacts the locking surface on core pulling type core, so that locking core pulling type core, avoids core pulling type core from retreating at the time of molding.It needs to illustrate
, molding one end will be used in core-pulling slide block, core pulling type core in the present embodiment and be defined as front end, and correspondingly define rear end
And two sides.
In order to reduce friction of the locking surface of core pulling type core in core pulling type core lateral displacement between cover half, we can be
Chamfering is set for the outer ledge of hooking core pulling type core on drag hook, extends to the hooking of straight-bar to form one and slope inwardly
Inclined-plane 321, when dynamic model is in molding state with cover half, hooking inclined-plane catches on the tail end of core pulling type core；When dynamic model and cover half point
Mould, core pulling pull rod drag hook catch on core pulling type core tail end to move back core pulling type core in pilot hole when, the tail of core pulling type core
End is slided along the hooking inclined-plane of drag hook, on the one hand core pulling type core at this time forms a lateral displacement, on the other hand forms one
A length travel, the tail end of core pulling type core from hooking inclined-plane close to straight-bar medial movement to far from straight-bar outside, also
It is to say, core pulling type core cannot keep synchronizing moving with core pulling pull rod in the longitudinal direction, to make core pulling type core with respect to the longitudinal direction of dynamic model
Displacement is less than length travel of the cover half with respect to dynamic model, and therefore, when dynamic model and cover half start to separate, the locking surface of core pulling type core is stood
It is separated with cover half, generates friction so as to be effectively prevented from the sword of locking surface and cover half；
B. when dynamic model retreats in place, the travel switch of a control core pulling oil cylinder 7 is touched, at this time the tail of core pulling type core
End is detached from core pulling pull rod and is in the first de-molding position.In order to reduce the friction between core pulling pull rod and core pulling type core, we
Can be arranged on core-pulling slide block with the guide groove 52 of pilot hole side by side, correspondingly, core pulling core package is included for molding core pulling sheet
Body 44 and the gib block 43 for being provided integrally at core pulling ontology side, core pulling ontology are located in pilot hole, and gib block sliding connects
It connects in guide groove, the drag hook of core pulling pull rod then catches on the tail end of core pulling ontology, and locking surface is then arranged on core pulling ontology.This
Outside, the guide through hole 431 axially extended is set on gib block, and the setting of guiding groove bottom extends along the glide direction of core pulling type core
Limited post 521, limited post is slideably threaded through in guide through hole, be pierced by guide post guide through hole outer end be arranged one
Limited cap 522, is arranged a core pulling spring 523 on the limited post in guide groove, and core pulling spring one end compresses guide groove bottom
Face, the other end compress gib block.In this way, when dynamic model and cover half divide mould, the drag hook of core pulling pull rod catch on core pulling ontology tail end to
When the forming ends on core pulling ontology being made to exit the inclination hole slot of product, the Bao Moli moment of core pulling type core is eliminated, at this time core pulling bullet
Spring can be driven gib block and fast move in guide groove, and then make drag hook phase point of the tail end of core pulling ontology with core pulling pull rod
From core pulling type core quickly reaches the first de-molding position, and passes through limited cap accurate limit.Certainly, we can be upper in gib block
Counterbore is respectively set in the both ends of guide through hole, to make core pulling spring and limited cap that can limit respectively in two counterbores.
It is known that when the forming ends of core pulling type core are deviate from from the side of product into hole slot, the drag hook of core pulling pull rod with
Certain exposure should be kept between the lateral convex block of core pulling type core, so that it is mobile to make core pulling pull rod that can pull on core pulling type core
A distance, to ensure the success of level-one core pulling.When the angle between the core pulling direction of core pulling type core and the longitudinal direction of mold is smaller
When, above-mentioned moving distance can be longer, to will increase the length of entire core pulling type core, and then increases core-pulling slide block or even entire mould
The size of tool.For this purpose, the U-shaped with U-shaped opening, which can be arranged, in the tail end of core pulling ontology in we turns button 6, and core pulling sheet
The tail end of body is rotatably connected on U-shaped and turns in the U-shaped opening of button, and U-shaped turns to buckle the side far from U-shaped opening close to core pulling drawing
Bar.In addition, the limit sliding chutes 53 extended along the core pulling direction of core pulling type core are arranged on core-pulling slide block, U-shaped turns the outside setting of button
The sliding rail 61 being slidably connected in limit sliding chutes, so as to limit the rotation that U-shaped turns button.As shown in Figure 5, Figure 6, it is remote to turn button for U-shaped
Side from U-shaped opening is arranged a reset and is open, and resetting the upside in opening is core pulling side 62, resets the downside in opening
To reset side 63.When dynamic model and cover half are in molding state, the drag hook of core pulling pull rod is located at U-shaped and turns the reset buckled opening
Interior, sliding rail is located in limit sliding chutes, and U-shaped at this time turns buckle in hooking position, and U-shaped turns button and can not turn with respect to core pulling ontology
Dynamic, drag hook catches on core pulling ontology.When dynamic model retrogressing is separated with cover half, drag hook catches on the core pulling side for resetting opening, and U-shaped turns button
Core pulling body shaft can be driven to move back.It is retracted in pilot hole when the forming ends of core pulling type core exit the inclination hole slot of product
When, sliding rail skids off limit sliding chutes, and core pulling type core is limited cap limit in the first de-molding position at this time, and the drag hook of core pulling pull rod then makes
U-shaped turns button and rotates forward to disengaged position, and drag hook abjection U-shaped turns the reset buckled opening.
Turn the rotational angle of button to limit U-shaped, and disengaged position can be accurately positioned in, we can turn button in U-shaped
One positioning torsional spring is set between the tail end of core pulling ontology, and positioning one end of torsional spring pins U-shaped and turns button, and the other end pins core pulling sheet
Body.In addition, U-shaped turns to buckle setting arc groove 64, and then setting is located at the spacer pin 45 in arc groove on core pulling ontology, thus structure
At a rotary position limiting structure.When the forming ends of core pulling type core exit the inclination hole slot of product and retract in pilot hole, sliding rail cunning
Out when limit sliding chutes, positioning torsional spring driving U-shaped turns button and rotates forward, and spacer pin at this time moves in arc groove, to make U-shaped
Turn button and be located in disengaged position, positioning torsional spring then can avoid U-shaped turn button and voluntarily invert；
C. core pulling cylinder action, so that core-pulling slide block be driven to slide backward, the forming ends of core-pulling slide block and product it is lateral
Shape separation, to complete secondary core extracting, the core pulling type core rested in core-pulling slide block at this time follows core-pulling slide block to be moved to the
Two de-molding positions；
D. the ejecting mechanism movement of mold, product is ejected from dynamic model, pickup can be completed from mold, thus complete
At the molding of a product；
E. core pulling oil cylinder counteragent, piston rod forward extend out, to drive core-pulling slide block forward slip, rest on
Core pulling type core in core-pulling slide block follows core-pulling slide block to be reset to the first de-molding position；
F. dynamic model Forward is molded with cover half, and drag hook, which first contacts the reset side for resetting and being open, makes U-shaped turn to buckle reverse flip,
Rotary position limiting structure makes U-shaped turn button be located in hooking position, and drag hook at this time, which is located at, to be resetted in opening, the sliding rail pair of U-shaped turn button
Quasi- limit sliding chutes, then drag hook turns to buckle by U-shaped pushes core pulling type core to move forward internally in pilot hole, and the sliding rail that U-shaped turns button then enters
In limit sliding chutes.Then the locking surface on the core pulling ontology of cover half contact core pulling type core, core pulling type core are inclined in core-pulling slide block
Pilot hole moves forward internally reset, and the forming ends of core pulling type core stretch out pilot hole, and the tail end of core pulling type core generates a lateral position simultaneously
Move and gradually close to core pulling pull rod；
G. dynamic model contacts with cover half and completes molding, and core pulling type core is reset to shaping position, and core pulling pull rod catches on core pulling type
U-shaped on core turns to buckle, and can start the injection molding of next product.
Interference is generated with drag hook when turning to be buckled in rotation in order to avoid U-shaped, we can also be in the pumping of the reset opening of U-shaped turn button
The raised line 65 of one semi-cylindrical of setting on the outside of core side, to make the cross section semicircular in shape of raised line, and the shape in raised line
At an avoiding space.When dynamic model and cover half are in molding state, the hook inclined-plane of drag hook and the semi-cylindrical of raised line recline,
And the end of drag hook is located at avoiding space, and when U-shaped turns button rotation, the end of drag hook can be relatively living in avoiding space
It is dynamic, and the semi-cylindrical of the hook inclined-plane of drag hook and raised line remains the state of reclining.
Claims (4)
1. a kind of classification core pulling method of injection mold, includes the following steps:
A. after in the mold cavity in molding state full of plastic cement simultaneously cooling and shaping, dynamic model retrogressing is separated with cover half, cover half
On core pulling pull rod catch on the inclination hole slot in the lateral shape for shaped article core pulling type core tail end, core pulling type core exists
It is obliquely axially moved back in the inclined pilot hole of the core-pulling slide block of lateral shape for shaped article by shaping position, core pulling
The forming ends of type core exit the inclination hole slot of product and retract in pilot hole, so that the level-one core pulling of product is completed, pumping at this time
The tail end of core pattern core generates a lateral displacement simultaneously；
B. when dynamic model retreats in place, the travel switch of a control core pulling oil cylinder is touched, at this time the tail end and pumping of core pulling type core
Core pull rod is detached from and is in the first de-molding position, and the guide groove with pilot hole side by side, the core pulling type are equipped on core-pulling slide block
Core includes the core pulling ontology in pilot hole and the gib block for being provided integrally at core pulling ontology side, gib block sliding
It is connected in guide groove, gib block is equipped with guide through hole, and guiding groove bottom is equipped with the glide direction extension along core pulling type core
Limited post, the outer end that limited post is slideably pierced by guide through hole are equipped with limited cap, are arranged on the limited post in guide groove
There is core pulling spring, core pulling spring one end compresses guiding groove bottom, and the other end compresses gib block, when dynamic model and cover half divide mould, core pulling
When the drag hook of pull rod catches on core pulling type core tail end to make the forming ends of core pulling type core exit the inclination hole slot of product, core pulling spring
Driving gib block fast moves in guide groove, and then core pulling type core is made quickly to reach the first de-molding position；
C. core pulling cylinder action, so that core-pulling slide block is driven to slide backward, the forming ends of core-pulling slide block and the lateral shape of product
Separation, to complete secondary core extracting, it is de- that the core pulling type core rested in core-pulling slide block at this time follows core-pulling slide block to be moved to second
Mould position；
D. the ejecting mechanism movement of mold, product is ejected from dynamic model, pickup can be completed from mold；
E. core pulling oil cylinder counteragent, to drive core-pulling slide block forward slip, rest on core pulling type core in core-pulling slide block with
The first de-molding position is reset to core-pulling slide block；
F. dynamic model Forward is molded with cover half, and cover half contacts a locking surface on core pulling type core, and core pulling type core inclines in core-pulling slide block
Oblique pilot hole moves forward internally reset, and the forming ends of core pulling type core stretch out pilot hole, and the tail end of core pulling type core generates a cross simultaneously
To displacement gradually close to core pulling pull rod；
G. dynamic model contacts with cover half and completes molding, and core pulling type core is reset to shaping position, and core pulling pull rod catches on core pulling type core
Tail end can start the injection molding of next product.
2. a kind of classification core pulling method of injection mold according to claim 1, characterized in that the core pulling pull rod includes
The straight-bar being fixedly connected with cover half and the drag hook being made of the bending extension of the end of straight-bar, thus keep core pulling pull rod L-shaped, institute
It states the outer ledge on drag hook for the side of hooking core pulling type core and is equipped with chamfering, extended to directly to form one and slope inwardly
The hooking inclined-plane of bar, the tail end of the core pulling type core are equipped with lateral convex block, and the lateral convex block is equipped with corresponding with hooking inclined-plane
Sliding bevel, when dynamic model and cover half be in molding state, hooking inclined-plane fits with sliding bevel, locking surface and cover half patch
It closes；When dynamic model and cover half divide mould, the drag hook of core pulling pull rod catches on the lateral convex block of core pulling type core tail end to make core pulling type core exist
When moving back in pilot hole, the sliding bevel of core pulling type core is slided along the hooking inclined-plane of drag hook, and core pulling type core at this time is on the one hand
A lateral displacement is formed, a length travel is on the other hand formed, to make sliding bevel from hooking inclined-plane close to straight-bar
Medial movement to far from straight-bar outside, and core pulling type core with respect to dynamic model length travel be less than cover half with respect to dynamic model indulging
To displacement, locking surface is separated with cover half.
3. a kind of classification core pulling method of injection mold according to claim 1, characterized in that the tail of the core pulling ontology
End is rotatably connected on a U-shaped and turns in the U-shaped opening of button, and core-pulling slide block is equipped with limit sliding chutes, and the outside that U-shaped turns button, which is equipped with, to be slided
The dynamic sliding rail being connected in limit sliding chutes, U-shaped turn to detain the side far from U-shaped opening and be equipped with to reset opening, reset the upside of opening
For core pulling side, the downside for resetting opening is to reset side, when dynamic model is in molding state with cover half, the drag hook of core pulling pull rod
In the reset opening that U-shaped turns button, sliding rail is located in limit sliding chutes, and U-shaped at this time turns buckle in hooking position；After dynamic model
Move back when being separated with cover half, drag hook catches on the core pulling side for resetting opening, U-shaped turn button i.e. by gib block drive core pulling core barrel to
It moves back；When the forming ends of core pulling type core exit the inclination hole slot of product and retract in pilot hole, sliding rail skids off limit sliding chutes, takes out
Core pattern core is limited cap limit, and U-shaped turns button and rotates forward to disengaged position, and drag hook abjection U-shaped turns the reset buckled opening；Work as dynamic model
When Forward is molded with cover half, drag hook, which first contact, to be resetted the reset side of opening U-shaped is made turn to buckle reverse flip to hooking position, at this time
Drag hook be located at reset opening in, U-shaped turn button sliding rail be aligned limit sliding chutes, then drag hook by U-shaped turn buckle promotion core pulling type
Core is moved forward internally in pilot hole；When dynamic model is moved to the locking surface of core pulling type core and cover half contacts, core pulling type core is in pilot hole
Forward resets.
4. a kind of classification core pulling method of injection mold according to claim 3, characterized in that turn button and guiding in U-shaped
It is equipped with positioning torsional spring and rotary position limiting structure between tail end, contracts when the forming ends of core pulling type core exit the inclination hole slot of product
Return in pilot hole, sliding rail is when skidding off limit sliding chutes, positioning torsional spring driving U-shaped turns button and rotates forward, and rotary position limiting structure turns U-shaped
Button is located in disengaged position；When dynamic model Forward is molded with cover half, drag hook, which first contacts the reset side for resetting and being open, makes U-shaped turn to buckle
Reverse flip, rotary position limiting structure make U-shaped turn button be located in hooking position.
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| CN109421215A (en) * | 2017-08-28 | 2019-03-05 | 深圳市银宝山新科技股份有限公司 | A kind of injection molding apparatus |
| CN107738412B (en) * | 2017-10-27 | 2020-03-17 | 宁波方正汽车模具股份有限公司 | Sliding block core pulling mechanism |
| CN107838397B (en) * | 2017-12-11 | 2023-08-11 | 江苏中翼汽车新材料科技有限公司 | Slider thimble mechanism of die-casting mould |
| CN108015993A (en) * | 2017-12-20 | 2018-05-11 | 深圳市华益盛模具股份有限公司 | A kind of core pulling method of injection mold |
| CN110126214A (en) * | 2019-04-11 | 2019-08-16 | 宁波公牛精密制造有限公司 | A kind of mold and its operation method with the secondary incorgruous pulled core structure of composite slider |
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| CN112549454B (en) * | 2019-09-10 | 2022-08-05 | 深圳兴精科塑胶模具有限公司 | Core-pulling mechanism of injection molding mold of oil tank refueling mask |
| CN113942191B (en) * | 2021-10-31 | 2024-03-12 | 盐城友生汽车配件有限公司 | Injection mold for self-ejection dust cover |
| CN114290628B (en) * | 2022-01-06 | 2023-07-21 | 宁波方正汽车模具股份有限公司 | Combined sliding block demoulding mechanism |
| CN116512541B (en) * | 2023-07-03 | 2023-08-22 | 赫比(成都)精密塑胶制品有限公司 | Sectional type slider actuating mechanism and injection molding machine |
| CN117382111B (en) * | 2023-12-11 | 2024-02-20 | 湖南四维模塑科技有限公司 | Injection mold for processing automobile parts |
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