CN106985352A - 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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- CN106985352A CN106985352A CN201710241626.5A CN201710241626A CN106985352A CN 106985352 A CN106985352 A CN 106985352A CN 201710241626 A CN201710241626 A CN 201710241626A CN 106985352 A CN106985352 A CN 106985352A
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- core
- pulling
- core pulling
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- shaped
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of classification core pulling method of injection mold, when dividing mould, core pulling oil cylinder drives an one-level core-pulling slide block being slidably connected in secondary core extracting sliding block to slide backward, and one-level core-pulling slide block then drives the core pulling core barrel being slidably connected with it to draw back, so as to complete one-level core pulling；The continuation of core pulling oil cylinder is acted, so as to pull secondary core extracting sliding block to retreat by one-level core-pulling slide block, and then completes secondary core extracting；Then product is ejected from dynamic model；Core pulling oil cylinder counteragent, makes one-level core-pulling slide block forward slip, and then drive core pulling core axial advancement and stretch out the forming ends of secondary core extracting sliding block；The continuation of core pulling oil cylinder is acted, so as to drive secondary core extracting sliding block and core pulling core, synchronously reach resets, and can now start the injection molding of next product.The present invention can not only simplify mould structure, adapt to the same lateral side core-pulling in shape with two any directions on product, and can avoid the retrogressing of core pulling core and sliding block.
Description
Technical field
The present invention relates to injection mold technical field, more particularly, to a kind of classification core pulling method of injection mold.
Background technology
Plastic cement products are very universal in production and daily life, and wherein injection molding is then most commonly seen one
Plasthetics molding mode is planted, it 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 provided with sprue bush, be respectively equipped with forming part corresponding with the upper and lower surface of product on fixed half and moving half.For
The forming part for enabling the product after shaping to rest on dynamic model side, usual cover half is corresponding with the profile of product die cavity,
And the forming part on dynamic model is core corresponding with the inner chamber of product.The forming method of existing injecting products is generally as follows：Will
Injection mold is fixed on injection machine, and then the injection head of injection machine projects the molten plastic cement of high pressure, and plastic cement passes through cover half
Enter running channel to enter in the molding cavity that die cavity and core are constituted, product is become after cooling, then dynamic model, top plate etc. are relative
Cover half is moved and point mould, and on the core that the product of shaping rests on dynamic model because of cooling meat, now top plate is acted, and drives push rod
The ejecting product from core, you can remove product, so as to complete single injection-molded.
When the product of injection molding has the lateral shape such as sidewise hole, groove with parting direction with angle, it is necessary to
Corresponding core-pulling mechanism is set on mould, will be used to be molded lateral shape by core-pulling mechanism during so as to parting after mould molding
The core of shape is extracted out in advance, so as to facilitate the separation of dynamic model and cover half, it is to avoid the core being laterally molded goes out to be molded as to product
Interference.Core-pulling mechanism is typically by mechanical structures such as Angle Pin, angled-lift splitses, or the hydraulic mechanism driving side such as hydraulic jack
It is displaced sideways to the core of shaping, sliding block etc., so as to realize side core-pulling.When in the lateral shape on product simultaneously have with
During the different sidewise hole slot structure in the core pulling direction of lateral shape, then need to set 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 ", its publication No. is CN102248641A, specific bag
Include horizontal core-pulling slide block, longitudinal core-pulling slide block, spring, affect bar, release link, longitudinal core-pulling slide block therein, which is arranged on, laterally to be taken out
In core sliding block.What the mould structure was adapted to is in lateral hole slot while having the product of longitudinal hole slot, mould when molding, if
The longitudinal core-pulling slide block put in horizontal core-pulling slide block is first acted, and realizes longitudinal core pulling, during avoiding horizontal core-pulling slide block from acting
Longitudinal core-pulling slide block causes interference to product；Then horizontal core-pulling slide block action, realizes horizontal 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 driven by the draw bar being longitudinally arranged, and draw bar is by spring driven, although it has letter in itself
Change the advantage of structure, but spring driven core pulling action is easy to fail, can be greatly if the elastic force design of spring is excessive
Resistance when increase resets, causes to reset difficulty.In addition, core pulling direction and the parting direction one of mould of its longitudinal core-pulling slide block
Cause, therefore, when the hole in the lateral shape for needed on product side core-pulling with the parting direction shape with mould in an angle
During groove, above-mentioned core-pulling device will be unable to realize the classification core pulling of product.
The content of the invention
The invention aims to solve the core pulling action present in existing injection mold classification pulled core structure easily
Resistance when failure, reset is big, and the longitudinal core pulling that can not be met in classification core pulling with mould parting direction there is one to press from both sides
The problem of requirement at angle, there is provided a kind of classification core pulling method of injection mold, can both significantly increase the stability of classification core pulling
And reliability, reset resistance is greatly reduced, while the classification core pulling requirement with inclined longitudinal core pulling can be met.
To achieve these goals, the present invention uses following technical scheme：
A kind of classification core pulling method of injection mold, comprises the following steps：
A. after in the mold cavity in matched moulds state full of plastic cement simultaneously cooling and shaping, dynamic model is retreated and separated with cover half, cover half
On core pulling pull bar catch on inclination hole slot in the lateral shape for shaped article core pulling core tail end, core pulling core exists
For by shaping position, obliquely axle to be moved back by the inclined pilot hole of the core-pulling slide block of the lateral shape of shaped article, core pulling
The forming ends of core exits the inclination hole slot of product and in retraction pilot hole, so as to complete the one-level core pulling of product, taking out now
The tail end of core pattern core produces a lateral displacement simultaneously；
B. when dynamic model is retreated in place, the travel switch of a control core pulling oil cylinder is touched, now the tail end of core pulling core is with taking out
Core pull bar departs from and is in the first de-molding position；
C. core pulling cylinder action, so that drive core-pulling slide block to slide backward, the forming ends of core-pulling slide block and the lateral shape of product
Separation, so as to complete secondary core extracting, it is de- that the core pulling core now rested in core-pulling slide block follows core-pulling slide block to be moved to second
Mould position；
D. the ejecting mechanism action of mould, product is ejected from dynamic model, you can pickup is completed from mould；
E. core pulling oil cylinder counteragent, so as to drive core-pulling slide block forward slip, the core pulling core rested in core-pulling slide block with
The first de-molding position is reset to core-pulling slide block；
F. dynamic model moves forward and cover half matched moulds, and a locking face on cover half contact core pulling core, core pulling core inclines in core-pulling slide block
Reach resets in oblique pilot hole, and the forming ends of core pulling core stretches out pilot hole, and the tail end of core pulling core produces a horizontal stroke simultaneously
To displacement progressively close to core pulling pull bar；
G. dynamic model contacts with cover half and completes matched moulds, and core pulling core is reset to shaping position, and core pulling pull bar catches on core pulling core
Tail end, you 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 set one can hooking core pulling core core pulling pull bar.So, when dynamic, cover half starts point mould, core pulling
Pull bar can catch on core pulling core and realize one-level core pulling, so that core pulling core can reliably divide mould, it is to avoid use Spring driving core pulling
The action failure that core core pulling easily occurs, significantly increases the stability and reliability of classification core pulling, greatly reduces reset
Resistance, while the classification core pulling requirement with inclined longitudinal core pulling can be met.Particularly, the present invention dexterously utilizes core pulling type
The angle of inclination of core in itself so that core pulling core forms a lateral displacement in core pulling, so, when core pulling core completes core pulling
When, the tail end reliable separation that core pulling pull bar can be with core pulling core, so as to dynamic model and point mould of cover half.And move, cover half matched moulds when,
Pushing by cover half to the locking face of core pulling core, make core pulling core reset and again with core pulling pull bar phase hooking.
Preferably, the core pulling pull bar includes the straight-bar being fixedly connected with cover half and bent by the end of straight-bar to extend
The drag hook of composition, so that core pulling pull bar is L-shaped, the outer ledge of the side on the drag hook for hooking core pulling core is provided with
Chamfering, extends to the hooking inclined-plane of straight-bar, the tail end of the core pulling core is provided with lateral projection so as to form one and slope inwardly,
The lateral projection is provided with sliding bevel corresponding with hooking inclined-plane, and when dynamic model is in matched moulds state with cover half, hooking is oblique
Face is fitted with sliding bevel, and locking face is fitted with cover half；When dynamic model and cover half point mould, the drag hook of core pulling pull bar catch on core pulling type
The lateral projection of core tail end so that core pulling core in pilot hole after when moving, the hook of the sliding bevel of core pulling core along drag hook
Hang inclined-plane to slide, on the one hand core pulling core now forms a lateral displacement, on the other hand forms a length travel, so that
Make medial movement of the sliding bevel close to straight-bar from hooking inclined-plane to the outside away from straight-bar, and core pulling core is with respect to dynamic model
Length travel be less than cover half with respect to the length travel of dynamic model, locking face and cover half are separated.
The core pulling pull bar of L-shaped is convenient to be processed, and ensures the reliability of hooking.It is known that in matched moulds state, cover half and take out
The locking face of core pattern core makes what is be brought into close contact, so as to locking core pulling core, it is to avoid core pulling core is retreated in shaping.Present invention wound
The property made an inclined hooking inclined-plane is set at the drag hook of core pulling pull bar, so, when dynamic model, cover half start point mould, one
Aspect can make the moving direction of hooking inclined-plane and core pulling core close to vertical, be taken out so that core pulling core is suffered in core pulling
The moving direction of the active force of core pull bar and core pulling core is consistent substantially, so that lateral turn round will not be produced to core pulling core
Square, is conducive to the smooth movement of core pulling core, it is to avoid core pulling core stuck phenomenon occurs because of sideway torque.On the other hand, by
In the afterbody of core pulling core abutted in all the time on hooking inclined-plane during core pulling, and core pulling core is with respect to core pulling pull bar
A lateral displacement is had, therefore, the contact position of core pulling core afterbody and hooking inclined-plane can be varied from, so that 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 core has one with respect to cover half
Length travel, makes core pulling core to leave cover half when starting core pulling and no longer keep being in close contact.On the contrary, working as matched moulds
When, the drag hook of core pulling pull bar first crosses the lateral projection of core pulling core tail end, and then the locking face of core pulling core is contacted with cover half,
So as to drive core pulling core to reset, core pulling core now has a lateral displacement, when core pulling core resets completely, core pulling
The sliding bevel of the lateral projection of core tail end is just fitted with the hooking inclined-plane on the drag hook of core pulling pull bar, that is to say, that hooked
Hanging inclined-plane makes core pulling core that the lateral displacement of core pulling core can be avoided to cause between locking face and cover half during whole core pulling
Friction and sliding bevel and hooking inclined-plane between friction so that when greatly reducing core pulling core core pulling friction resistance
Power, it is advantageously ensured that the smooth progress of one-level core pulling.
Preferably, provided with the guide groove with pilot hole side by side on core-pulling slide block, the core pulling core, which includes being located at, leads
Core pulling body into hole and the gib block for being provided integrally at core pulling body side, gib block are slidably connected at guide groove
Interior, gib block is provided with guide through hole, is oriented to groove bottom and is provided with the limited post extended along the glide direction of core pulling core, limited post
The outer end for slideably passing guide through hole is provided with limited cap, and core pulling spring is arranged with the limited post in guide groove, is taken out
Core spring one end compresses guiding groove bottom, and the other end compresses gib block, when the drag hook of dynamic model and cover half point mould, core pulling pull bar is caught on
Core pulling core tail end is so that when the forming ends of core pulling core exits the inclination hole slot of product, core pulling Spring driving gib block is being led
Quickly moved into groove, and then core pulling core is quickly reached the first de-molding position.
The present invention sets the gib block of one in the core pulling body side for shaping, in order to set corresponding limited post
With core pulling spring.So, in one-level core pulling, when core pulling pull bar, which catches on core pulling core, to be extracted out out of lateral hole slot of the product,
Core pulling spring can drive core pulling core rapidly to move afterwards by gib block, core pulling core is separated with core pulling pull bar and is reduced and rub
Wipe, limited post can then limit the rear shifting distance of core pulling core exactly, core pulling core is accurately and reliably positioned at first demoulding
Position, and enough evaded distances are formed between core pulling pull bar and core pulling core in the horizontal in matched moulds, to avoid in matched moulds
When core pulling pull bar and core pulling core tail end between produce interference and collision.
Turn preferably, the tail end of the core pulling body is rotatably connected on a U-shaped in the U-shaped opening of button, core-pulling slide block
Limit sliding chutes are provided with, the outside that U-shaped turns button is provided with the slide rail being slidably connected in limit sliding chutes, and U-shaped turns button away from U-shaped opening
Side provided with reset be open, reset opening upside for core pulling side, reset opening downside for reset side, when dynamic model with
When cover half is in matched moulds state, the drag hook of core pulling pull bar is located in the reset opening that U-shaped turn is buckled, and slide rail is located in limit sliding chutes,
U-shaped now turns buckle in hooking position；When dynamic model, which is retreated, to be 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 be moved back by by gib block；The inclination hole slot of product is exited when the forming ends of core pulling core and
When in retraction pilot hole, slide rail skids off limit sliding chutes, and it is spacing that core pulling core is limited cap, and U-shaped turns button and rotated forward to disengaging position
Put, drag hook abjection U-shaped turns the reset opening buckled；When dynamic model reach is with cover half matched moulds, drag hook first contacts the reset for resetting opening
Side makes U-shaped turn button reverse flip to hooking position, and drag hook now is located in reset opening, and the slide rail that U-shaped turns button is directed at limit
Position chute, then drag hook turns to buckle by U-shaped promotes core pulling core to be moved forward in pilot hole；When dynamic model is moved to the lock of core pulling core
When only face is contacted with cover half, core pulling core moves forward reset in pilot hole.
It is known that when the forming ends of core pulling core is deviate from out of lateral hole slot of the product, the drag hook of core pulling pull bar with
Certain exposure should be kept between the tail end of core pulling core, so that core pulling pull bar can pull on core pulling core and move one section
Distance, to ensure the success of one-level core pulling.When the angle between the core pulling direction of core pulling core and the longitudinal direction of mould is smaller, on
Stating displacement can be longer, so as to can increase the length of whole core pulling core, and then increases core-pulling slide block or even whole mould
Size.The present invention creatively sets a rotatable U-shaped to turn button in the tail end of gib block, and in matched moulds state, U-shaped turns button
On slide rail be located in the limit sliding chutes of core-pulling slide block, U-shaped now, which turns button, to be rotated, and therefore, core pulling pull bar can catch on U-shaped
Turn the reset opening of button, so as to drive gib block and core pulling core to carry out one-level core pulling.When core pulling core is from the lateral of product
When being extracted out in hole slot, slide rail is to skid off limit sliding chutes, and U-shaped turn button now is free to rotate, so that the drawing with core pulling pull bar
Hook is deviate from.When the die is closed, drag hook can touch the reset opening of the new transits of U again, so that U-shaped turns button reversion and puts hooking position, this
When core pulling pull bar can promote gib block reach reset, U-shaped turns the limit sliding chutes that the slide rail buckled reenters core-pulling slide block
It is interior.That is, the present invention deviates to stop movement in the forming ends one of core pulling core out of lateral hole slot of the product, so that
The size of core pulling core, core-pulling slide block and mould can greatly be shortened, particularly, rotatable U-shaped, which turns button, effectively to be kept away
Exempt to produce interference and collision when resetting between core pulling pull bar and core pulling core.
Preferably, turning in U-shaped provided with positioning torsion spring and rotary position limiting structure between button and gib block tail end, when core pulling type
The forming ends of core exit the inclination hole slot of product and in retraction pilot hole, slide rail is when skidding off limit sliding chutes, positioning torsion spring driving U-shaped
Turn button to rotate forward, rotary position limiting structure makes U-shaped turn button to be positioned at disengaged position；When dynamic model reach is with cover half matched moulds, drag hook
First contact reset opening reset side make U-shaped turn button reverse flip, rotary position limiting structure make U-shaped turn button be positioned at hooking position
Put.
Positioning torsion spring can make U-shaped turn reliable location when being buckled in rotation, be conducive to the drag hook of core pulling pull bar during matched moulds to enter multiple
In the opening of position.
Therefore, the present invention has the advantages that：Both the stability and reliability of classification core pulling, pole can be significantly increased
The earth reduction resets resistance, while the classification core pulling requirement with inclined longitudinal core pulling can be met.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the embodiment of the present invention 1.
Fig. 2 is the attachment structure schematic diagram of core-pulling slide block in Fig. 1 and core pulling core.
Fig. 3 is a kind of structural representation of the embodiment of the present invention 2.
Fig. 4 is in figure 3 core-pulling slide block and the attachment structure schematic diagram of core pulling core.
Fig. 5 be U-shaped turn at hooking position and core pulling pull bar attachment structure schematic diagram.
Fig. 6 be U-shaped turn in disengaged position and core pulling pull bar attachment structure schematic diagram.
In figure：1st, cover half 2, dynamic model 21, moving platen 22, dynamic model pressing plate 23, top plate 231, push rod 3, core pulling pull bar
31st, straight-bar 32, drag hook 321, hook inclined-plane 4, core pulling core 41, lateral projection 411, sliding bevel 42, locking face
43rd, gib block 431, guide through hole 44, core pulling body 45, spacer pin 5, core-pulling slide block 51, pilot hole 52, guide groove
521st, limited post 522, limited cap 523, core pulling spring 53, limit sliding chutes 6, U-shaped turn to buckle 61, slide rail 62, core pulling side
63rd, side 64, deep-slotted chip breaker 65 are resetted；Raised line 7, core pulling oil cylinder.
Embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
The classification core pulling method of the injection mold of the present invention is applied to simultaneously have in the lateral shape for need side core-pulling
The product of the lateral hole slot of side core-pulling in need, and laterally the core pulling direction of shape and the core pulling direction of lateral hole slot are differed
Cause, that is to say, that for be molded lateral shape big sliding block and for be molded lateral hole slot core or small slide block need along
Different direction core pullings, and need first to make the core of the lateral hole slot of shaping or small slide block core pulling and separate with product, Ran Houcai
Big slipper block loose core can be made, so as to avoid the core or small slide block in the lateral hole slot in big slipper block loose core with still remaining in product
Produce Xiang Hu Gan Wataru.
As shown in figure 1, the cover half 1 of the injection mold including top of the present invention, the dynamic model 2 of bottom and being arranged on dynamic model one
Forming part corresponding with the upper surface of product is set on the ejecting mechanism of side, cover half, and the downside of cover half has a die joint.It is dynamic
Mould then includes setting the lower surface with product on moving platen 21 and the dynamic model pressing plate 22 being arranged on below moving platen, moving platen
Corresponding forming part, the upside of moving platen has a die joint.In addition, setting left and right two between moving platen and dynamic model pressing plate
Individual feet, so as to constitute an ejection space, sets the forming part of correspondence moving platen on top plate 23, top plate in the ejection space
Position sets some push rods 231, so that ejecting mechanism is formed, so as to the ejecting product after formed product point mould.In the present embodiment,
Cover half side is referred to as upside by us, and dynamic model side is referred to as into downside, correspondingly, above and below the moving direction of dynamic model is during point mould
Direction, or be longitudinal direction, and correspondingly define the left and right sides or transverse direction, when mould on horizontal injection molding machine in use, on
Lower direction is horizontal direction.Because the essential structure of injection forming mold belongs to the state of the art, do not did herein
Many descriptions.
The present embodiment it is targeted be that core-pulling mechanism needs to be arranged on the product of dynamic model side, taken out accordingly, it is desirable to set
Core sliding block 5 and core pulling core 4, for needing the lateral shape and lateral hole slot of side core-pulling on shaped article, specifically,
It can be adopted during formed product and realize classification core pulling with the following method.
Embodiment 1：A kind of classification core pulling method of injection mold, comprises the following steps：
A. after the plastic cement full of molten in the mold cavity in matched moulds state and cooling and shaping, dynamic model is retreated and cover half
Separate, the tail end of core pulling core is caught in the lower end for a vertical core pulling pull bar 3 being fixedly installed on cover half, makes core pulling core
By shaping position, obliquely axle is moved back by the inclined pilot hole 51 of core-pulling slide block, and core-pulling slide block therein, which is used to be molded, to be produced
The lateral shape of product, the inclination hole slot that core pulling core is then used in the lateral shape of shaped article, and core-pulling slide block and core pulling
The core pulling direction of core is inconsistent.When the forming ends of core pulling core front end exits the inclination hole slot of product and in retraction pilot hole
When, that is, the one-level core pulling of product is completed, now on the one hand the tail end of the core pulling core of inclination movement forms a length travel, together
When produce a lateral displacement.As shown in Fig. 2 the core pulling pull bar of the present invention includes being fixedly connected with cover half and towards dynamic model side
The straight-bar 31 of Longitudinal extending and the drag hook 32 being made up of the end bending extension of straight-bar, so that core pulling pull bar is L-shaped.Accordingly
Ground, the tail end of core pulling core sets the lateral projection 41 of one, and the drag hook of core pulling pull bar is hooked on the lateral projection of core pulling core
On.In addition, there is the locking face 42 of a transverse direction on core pulling core, and when dynamic model is with cover half matched moulds state, cover half contact core pulling type
Locking face on core, so that locking core pulling core, it is to avoid core pulling core is retreated in shaping.It should be noted that the present embodiment
It is middle that the one end for being used to be molded in core-pulling slide block, core pulling core is defined as front end, and correspondingly define rear end and both sides.
In order to reduce friction of the locking face of core pulling core in core pulling core lateral displacement between cover half, we can be
The outer ledge of lateral projection on drag hook for hooking core pulling core sets chamfering, is extended to so as to form an inward slant
Sliding bevel 411 corresponding with hooking inclined-plane is correspondingly set on the hooking inclined-plane 321 of straight-bar, lateral projection, when dynamic model is with determining
When mould is in matched moulds state, hooking inclined-plane is fitted with sliding bevel, and locking face is fitted with cover half；When dynamic model and cover half point mould,
The drag hook of core pulling pull bar catch on the lateral projection of core pulling core tail end so that core pulling core in pilot hole after move when, core pulling type
Hooking inclined-plane of the sliding bevel along drag hook on the lateral projection of core is slided, and on the one hand core pulling core now forms a horizontal stroke
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 away from
The outside of straight-bar, that is to say, that core pulling core can not keep synchronizing moving with core pulling pull bar in the vertical, so that core pulling core
Length travel with respect to 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 face of core is separated with cover half immediately, and friction is produced so as to be effectively prevented from locking face and the sword of cover half；
B. when dynamic model is retreated in place, touch the travel switch of a control core pulling oil cylinder 7, now the tail end of core pulling core with
Core pulling pull bar departs from and is in the first de-molding position.In order to reduce the friction between core pulling pull bar and core pulling core, we can be
On core-pulling slide block set with the guide groove 52 of pilot hole side by side, correspondingly, core pulling core include for be molded core pulling body 44,
And the gib block 43 of core pulling body side is provided integrally at, core pulling body is located in pilot hole, and gib block is slidably connected at
In guide groove, and lateral projection is then arranged on the tail end of core pulling body.In addition, setting the guiding axially extended to lead on gib block
Hole 431, is oriented to the limited post 521 that groove bottom sets the glide direction along core pulling core to extend, limited post is slideably located in
The outer end that guide through hole is passed in guide through hole, on lead sets a limited cap 522, on the limited post in guide groove
A core pulling spring 523 is arranged, core pulling spring one end compresses guiding groove bottom, and the other end compresses gib block.So, when dynamic model with
Cover half divides mould, the drag hook of core pulling pull bar catches on core pulling core tail end so that the forming ends of core pulling core exits the angling hole of product
During groove, the Bao Moli moments of core pulling core eliminate, and now core pulling spring can drive gib block quickly to be moved in guide groove, enter
And the lateral projection of core pulling core is separated with the drag hook of core pulling pull bar, core pulling core quickly reaches the first de-molding position, and
Pass through limited cap accurate limit.That is, the core pulling spring in the present invention is to play a driving core pulling core quickly to move
The effect moved and separated with core pulling pull bar, and power required during core pulling core core pulling then comes from core pulling pull bar, therefore core pulling bullet
Elastic force needed for spring is smaller, correspondingly, and the elastic force of the required core pulling spring overcome is also smaller when core pulling core resets.Certainly, I
On gib block positioned at the two ends of guide through hole counterbore can be set respectively so that core pulling spring and limited cap can be spacing respectively
In two counterbores；
C. core pulling cylinder action, so that drive core-pulling slide block to slide backward, the forming ends of core-pulling slide block and the lateral shape of product
Separation, so as to complete secondary core extracting, it is de- that the core pulling core now rested in core-pulling slide block follows core-pulling slide block to be moved to second
Mould position；
D. the ejecting mechanism action of mould, product is ejected from dynamic model, you can pickup is completed from mould, so as to complete one
The shaping of individual product；
E. core pulling oil cylinder counteragent, its piston rod is forward extended out, so as to drive core-pulling slide block forward slip, rests on core pulling
Core pulling core in sliding block follows core-pulling slide block to be reset to the first de-molding position；
F. dynamic model moves forward and cover half matched moulds, and a locking face on cover half contact core pulling core, core pulling core inclines in core-pulling slide block
Reach resets in oblique pilot hole, and the forming ends of core pulling core stretches out pilot hole, and the tail end of core pulling core produces a horizontal stroke simultaneously
To displacement progressively close to core pulling pull bar；
G. dynamic model contacts with cover half and completes matched moulds, and core pulling core is reset to shaping position, and core pulling pull bar catches on core pulling core
Tail end, you 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, comprises the following steps：
A. after the plastic cement full of molten in the mold cavity in matched moulds state and cooling and shaping, dynamic model 2 is retreated and cover half
1 separates, and the tail end of core pulling core 4 is caught in the lower end for a vertical core pulling pull bar 3 being fixedly installed on cover half, makes core pulling type
By shaping position, obliquely axle is moved back by core in the inclined pilot hole 51 of core-pulling slide block 5.When the shaping of core pulling core front end
End exits the inclination hole slot of product and when in retraction pilot hole, that is, completes the core pulling of the one-level core pulling, now inclination movement of product
On the one hand the tail end of core forms a length travel, while producing a lateral displacement.Core pulling pull bar includes fixing with cover half
Connect and the straight-bar 31 towards dynamic model side Longitudinal extending and the bending of the end by straight-bar extend the drag hook 32 constituted, so that
Core pulling pull bar is L-shaped.In addition, there is the locking face 42 of a transverse direction on core pulling core, and when dynamic model is with cover half matched moulds state, cover half
The locking face on core pulling core is contacted, so that locking core pulling core, it is to avoid core pulling core is retreated in shaping.Need explanation
Be, in the present embodiment by core-pulling slide block, core pulling core be used for be molded one end be defined as front end, and correspondingly define rear end with
And both sides.
In order to reduce friction of the locking face of core pulling core in core pulling core lateral displacement between cover half, we can be
Outer ledge on drag hook for hooking core pulling core sets chamfering, and the hooking of straight-bar is extended to so as to form one and slope inwardly
Inclined-plane 321, when dynamic model is in matched moulds state with cover half, hooking inclined-plane catches on the tail end of core pulling core；When dynamic model and cover half point
Mould, the drag hook of core pulling pull bar catch on core pulling core tail end so that core pulling core in pilot hole after move when, the tail of core pulling core
Hold along the hooking inclined-plane of drag hook and slide, on the one hand core pulling core now forms a lateral displacement, on the other hand forms one
Individual length travel, the medial movement of the tail end of core pulling core from hooking inclined-plane close to straight-bar is to the outside away from straight-bar, also
It is to say, core pulling core can not keep synchronizing moving with core pulling pull bar in the vertical, so that longitudinal direction of the core pulling core with respect to dynamic model
Displacement is less than length travel of the cover half with respect to dynamic model, therefore, when dynamic model and cover half start separated, and the locking face of core pulling core is vertical
Separated with cover half, friction is produced so as to be effectively prevented from locking face and the sword of cover half；
B. when dynamic model is retreated in place, touch the travel switch of a control core pulling oil cylinder 7, now the tail end of core pulling core with
Core pulling pull bar departs from and is in the first de-molding position.In order to reduce the friction between core pulling pull bar and core pulling core, we can be
On core-pulling slide block set with the guide groove 52 of pilot hole side by side, correspondingly, core pulling core include for be molded core pulling body 44,
And the gib block 43 of core pulling body side is provided integrally at, core pulling body is located in pilot hole, and gib block is slidably connected at
In guide groove, the drag hook of core pulling pull bar then catches on the tail end of core pulling body, and locking face is then arranged on core pulling body.In addition, leading
The guide through hole 431 axially extended is set on to bar, the limit that groove bottom sets the glide direction along core pulling core to extend is oriented to
Position post 521, limited post is slideably located in guide through hole, and the outer end setting one that guide through hole is passed on lead is spacing
Cap 522, is arranged a core pulling spring 523 on the limited post in guide groove, and core pulling spring one end compresses guiding groove bottom, separately
One end compresses gib block.So, when dynamic model and cover half point mould, the drag hook of core pulling pull bar catch on core pulling body tail end so that core pulling
When forming ends on body exits the inclination hole slot of product, the Bao Moli moments of core pulling core eliminate, now core pulling spring
Driving gib block is quickly moved in guide groove, and then the tail end of core pulling body is separated with the drag hook of core pulling pull bar, core pulling
Core quickly reaches the first de-molding position, and passes through limited cap accurate limit.Certainly, we can be located to be oriented on gib block and lead to
The two ends in hole set counterbore respectively, so that core pulling spring and limited cap can be spacing in two counterbores respectively.
It is known that when the forming ends of core pulling core is deviate from out of lateral hole slot of the product, the drag hook of core pulling pull bar with
Certain exposure should be kept between the lateral projection of core pulling core, so that core pulling pull bar can pull on the movement of core pulling core
One segment distance, to ensure the success of one-level core pulling.When the angle between the core pulling direction of core pulling core and the longitudinal direction of mould is smaller
When, above-mentioned displacement can be longer, so as to can increase the length of whole core pulling core, and then increases core-pulling slide block or even whole mould
The size of tool.Therefore, we can set a U-shaped with U-shaped opening to turn button 6, and core pulling sheet in the tail end of core pulling body
The tail end of body is rotatably connected on U-shaped and turned in the U-shaped opening of button, and U-shaped turns to buckle the side away from U-shaped opening close to core pulling drawing
Bar.In addition, setting the limit sliding chutes 53 along the core pulling direction extension of core pulling core on core-pulling slide block, the outside that U-shaped turns button is set
The slide rail 61 in limit sliding chutes is slidably connected at, so as to limit the rotation that U-shaped turns button.As shown in Figure 5, Figure 6, U-shaped turns button far
Side from U-shaped opening sets one to reset opening, and it is core pulling side 62 to reset the upside in opening, resets the downside in opening
To reset side 63.When dynamic model and cover half are in matched moulds state, the drag hook of core pulling pull bar is located at the reset opening that U-shaped turns to buckle
Interior, slide rail is located in limit sliding chutes, and U-shaped now turns buckle in hooking position, and U-shaped turn button can not relative core pulling body turn
Dynamic, drag hook catches on core pulling body.When dynamic model, which is retreated, to be 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 be moved back by.When the forming ends of core pulling core exits the inclination hole slot of product and in retraction pilot hole
When, slide rail skids off limit sliding chutes, and now core pulling core is limited that cap is spacing in the first de-molding position, and the drag hook of core pulling pull bar then makes
U-shaped turns button and rotated forward to disengaged position, and drag hook abjection U-shaped turns the reset opening buckled.
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 torsion spring is set between the tail end of core pulling body, and positioning one end pins U-shaped and turns button, and the other end pins core pulling sheet
Body.In addition, U-shaped turns to buckle setting deep-slotted chip breaker 64, and the spacer pin 45 being located in deep-slotted chip breaker is then set, so that structure on core pulling body
Into a rotary position limiting structure.When the forming ends of core pulling core exit the inclination hole slot of product and in retraction pilot hole, slide rail slides
When going out limit sliding chutes, positioning torsion spring driving U-shaped turns button and rotated forward, and spacer pin now is moved in deep-slotted chip breaker, so that U-shaped
Turn button and be positioned at disengaged position, positioning torsion spring can then avoid U-shaped turn button from voluntarily inverting；
C. core pulling cylinder action, so that drive core-pulling slide block to slide backward, the forming ends of core-pulling slide block and the lateral shape of product
Separation, so as to complete secondary core extracting, it is de- that the core pulling core now rested in core-pulling slide block follows core-pulling slide block to be moved to second
Mould position；
D. the ejecting mechanism action of mould, product is ejected from dynamic model, you can pickup is completed from mould, so as to complete one
The shaping of individual product；
E. core pulling oil cylinder counteragent, its piston rod is forward extended out, so as to drive core-pulling slide block forward slip, rests on core pulling
Core pulling core in sliding block follows core-pulling slide block to be reset to the first de-molding position；
F. dynamic model moves forward and cover half matched moulds, and the reset side that drag hook first contacts reset opening makes U-shaped turn buckle reverse flip, rotates
Position limiting structure makes U-shaped turn button to be positioned at hooking position, and drag hook now, which is located at, to be resetted in opening, and U-shaped turns the slide rail alignment limit of button
Position chute, then drag hook turns to buckle by U-shaped promotes core pulling core to be moved forward in pilot hole, and the slide rail that U-shaped turns button then enters spacing
In chute.Then cover half contacts the locking face on the core pulling body of core pulling core, and core pulling core is in the inclined guiding of core-pulling slide block
Move forward and reset in hole, the forming ends of core pulling core stretches out pilot hole, the tail end of core pulling core produce a lateral displacement simultaneously and
Progressively close to core pulling pull bar；
G. dynamic model is contacted with cover half and completes matched moulds, and core pulling core is reset to shaping position, and core pulling pull bar is caught on core pulling core
U-shaped turn button, you can start the injection molding of next product.
Interference is produced with drag hook when turning to be buckled in rotation in order to avoid U-shaped, we can also turn taking out for the reset opening of button in U-shaped
Core side outside sets the raised line 65 of a semi-cylindrical, so that the cross section semicircular in shape of raised line, and the shape in raised line
Into an avoidance space.When dynamic model and cover half are in matched moulds state, the hook inclined-plane of drag hook and the semi-cylindrical of raised line recline,
And the end of drag hook, which is located at, to be avoided at space, when U-shaped, which turns button, to be rotated, the end of drag hook can relatively live avoiding in 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 (5)
1. a kind of classification core pulling method of injection mold, comprises the following steps：
A. after in the mold cavity in matched moulds state full of plastic cement simultaneously cooling and shaping, dynamic model is retreated and separated with cover half, cover half
On core pulling pull bar catch on inclination hole slot in the lateral shape for shaped article core pulling core tail end, core pulling core exists
For by shaping position, obliquely axle to be moved back by the inclined pilot hole of the core-pulling slide block of the lateral shape of shaped article, core pulling
The forming ends of core exits the inclination hole slot of product and in retraction pilot hole, so as to complete the one-level core pulling of product, taking out now
The tail end of core pattern core produces a lateral displacement simultaneously；
B. when dynamic model is retreated in place, the travel switch of a control core pulling oil cylinder is touched, now the tail end of core pulling core is with taking out
Core pull bar departs from and is in the first de-molding position；
C. core pulling cylinder action, so that drive core-pulling slide block to slide backward, the forming ends of core-pulling slide block and the lateral shape of product
Separation, so as to complete secondary core extracting, it is de- that the core pulling core now rested in core-pulling slide block follows core-pulling slide block to be moved to second
Mould position；
D. the ejecting mechanism action of mould, product is ejected from dynamic model, you can pickup is completed from mould；
E. core pulling oil cylinder counteragent, so as to drive core-pulling slide block forward slip, the core pulling core rested in core-pulling slide block with
The first de-molding position is reset to core-pulling slide block；
F. dynamic model moves forward and cover half matched moulds, and a locking face on cover half contact core pulling core, core pulling core inclines in core-pulling slide block
Reach resets in oblique pilot hole, and the forming ends of core pulling core stretches out pilot hole, and the tail end of core pulling core produces a horizontal stroke simultaneously
To displacement progressively close to core pulling pull bar；
G. dynamic model contacts with cover half and completes matched moulds, and core pulling core is reset to shaping position, and core pulling pull bar catches on core pulling core
Tail end, you can start the injection molding of next product.
2. a kind of classification core pulling method of injection mold according to claim 1, it is characterized in that, the core pulling pull bar includes
The straight-bar being fixedly connected with cover half and the drag hook being made up of the end bending extension of straight-bar, so that core pulling pull bar is L-shaped, institute
The outer ledge for stating the side on drag hook for hooking core pulling core is provided with chamfering, is extended to directly so as to form one and slope inwardly
The hooking inclined-plane of bar, the tail end of the core pulling core is provided with lateral projection, and the lateral projection is provided with corresponding with hooking inclined-plane
Sliding bevel, when dynamic model and cover half are in matched moulds state, hooking inclined-plane fits with sliding bevel, locking face and cover half patch
Close；When dynamic model and cover half point mould, the drag hook of core pulling pull bar catch on the lateral projection of core pulling core tail end so that core pulling core exists
When being moved after in pilot hole, the hooking inclined-plane of the sliding bevel of core pulling core along drag hook is slided, and core pulling core now is on the one hand
A lateral displacement is formed, a length travel is on the other hand formed, so that sliding bevel close straight-bar from hooking inclined-plane
Medial movement to away from straight-bar outside, and core pulling core with respect to dynamic model length travel be less than cover half with respect to dynamic model indulging
To displacement, locking face and cover half are separated.
3. a kind of classification core pulling method of injection mold according to claim 1, it is characterized in that, it is provided with core-pulling slide block
With the guide groove of pilot hole side by side, the core pulling core includes the core pulling body being located in pilot hole and is provided integrally at
The gib block of core pulling body side, gib block is slidably connected in guide groove, and gib block is provided with guide through hole, is oriented to groove bottom
Limited post provided with the glide direction extension along core pulling core, limited post slideably passes the outer end of guide through hole provided with spacing
Cap, is arranged with core pulling spring on the limited post in guide groove, and core pulling spring one end compresses guiding groove bottom, and the other end is compressed
Gib block, when the drag hook of dynamic model and cover half point mould, core pulling pull bar catches on core pulling core tail end so that the forming ends of core pulling core
When exiting the inclination hole slot of product, core pulling Spring driving gib block is quickly moved in guide groove, and then makes core pulling core quick
Reach the first de-molding position.
4. a kind of classification core pulling method of injection mold according to claim 3, it is characterized in that, the tail of the core pulling body
End is rotatably connected in the U-shaped opening of a U-shaped turn button, and core-pulling slide block is provided with limit sliding chutes, and the outside of U-shaped turn button, which is provided with, to be slided
The dynamic slide rail being connected in limit sliding chutes, side of the U-shaped turn button away from U-shaped opening resets the upside of opening provided with opening is resetted
For core pulling side, the downside of reset opening is resets side, when dynamic model is in matched moulds state with cover half, the drag hook of core pulling pull bar
In the reset opening that U-shaped turns button, slide rail is located in limit sliding chutes, and U-shaped now 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 turns button and drives core pulling core axial by gib block
After move；When the forming ends of core pulling core exits the inclination hole slot of product and when in retraction pilot hole, slide rail skids off limit sliding chutes, takes out
It is spacing that core pattern core is limited cap, and U-shaped turns button and rotated forward to disengaged position, and drag hook abjection U-shaped turns the reset opening buckled；Work as dynamic model
When reach is with cover half matched moulds, drag hook, which is first contacted, to be resetted the reset side of opening and U-shaped is turned to buckle reverse flip to hooking position, now
Drag hook be located at reset opening in, U-shaped turn button slide rail alignment limit sliding chutes, then drag hook by U-shaped turn buckle promote core pulling type
Core moves forward in pilot hole；When the locking face that dynamic model is moved to core pulling core is contacted with cover half, core pulling core is in pilot hole
Reach resets.
5. a kind of classification core pulling method of injection mold according to claim 4, it is characterized in that, turn button with being oriented in U-shaped
Provided with positioning torsion spring and rotary position limiting structure between bar tail end, contracted when the forming ends of core pulling core exits the inclination hole slot of product
Return in pilot hole, slide rail is when skidding off limit sliding chutes, positioning torsion spring driving U-shaped turns button and rotated forward, and rotary position limiting structure turns U-shaped
Button is positioned at disengaged position；When dynamic model reach is with cover half matched moulds, the reset side that drag hook first contacts reset opening makes U-shaped turn to buckle
Reverse flip, rotary position limiting structure makes U-shaped turn button to be positioned at hooking position.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107738412A (en) * | 2017-10-27 | 2018-02-27 | 宁波方正汽车模具有限公司 | A kind of sliding block core-pulling mechanism |
| CN107838397A (en) * | 2017-12-11 | 2018-03-27 | 江苏中翼汽车新材料科技有限公司 | A kind of slide block thimble mechanism of compression mod |
| 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 |
| 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 |
| 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 |
| CN110202753A (en) * | 2019-07-04 | 2019-09-06 | 晋江市思博箱包配件有限公司 | Automatic assembling turns to hook modular structure, mold and its method of operating |
| CN112549454A (en) * | 2019-09-10 | 2021-03-26 | 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 |
| CN113942191A (en) * | 2021-10-31 | 2022-01-18 | 盐城友生汽车配件有限公司 | Self-ejection dust cover injection mold |
| CN114290628A (en) * | 2022-01-06 | 2022-04-08 | 宁波方正汽车模具股份有限公司 | Combined sliding block demoulding mechanism |
| CN115366351A (en) * | 2022-02-28 | 2022-11-22 | 浙江凯华模具有限公司 | Inclined core pulling structure in oil cylinder sliding block |
| CN116512541A (en) * | 2023-07-03 | 2023-08-01 | 赫比(成都)精密塑胶制品有限公司 | Sectional type slider actuating mechanism and injection molding machine |
| CN117382111A (en) * | 2023-12-11 | 2024-01-12 | 湖南四维模塑科技有限公司 | Injection mold for processing automobile parts |
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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 |
| CN107738412A (en) * | 2017-10-27 | 2018-02-27 | 宁波方正汽车模具有限公司 | A kind of sliding block core-pulling mechanism |
| 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 |
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| 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 |
| CN110202753A (en) * | 2019-07-04 | 2019-09-06 | 晋江市思博箱包配件有限公司 | Automatic assembling turns to hook modular structure, mold and its method of operating |
| CN110202753B (en) * | 2019-07-04 | 2023-10-20 | 晋江市思博箱包配件有限公司 | Automatic assembly rotating hook module structure, mold and action method thereof |
| 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 |
| CN112549454A (en) * | 2019-09-10 | 2021-03-26 | 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 |
| CN113942191A (en) * | 2021-10-31 | 2022-01-18 | 盐城友生汽车配件有限公司 | Self-ejection dust cover injection mold |
| 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 |
| CN114290628A (en) * | 2022-01-06 | 2022-04-08 | 宁波方正汽车模具股份有限公司 | Combined sliding block demoulding mechanism |
| 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 |
| CN115366351A (en) * | 2022-02-28 | 2022-11-22 | 浙江凯华模具有限公司 | Inclined core pulling structure in oil cylinder sliding block |
| CN116512541A (en) * | 2023-07-03 | 2023-08-01 | 赫比(成都)精密塑胶制品有限公司 | Sectional type slider actuating mechanism and injection molding machine |
| 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 |
| CN117382111A (en) * | 2023-12-11 | 2024-01-12 | 湖南四维模塑科技有限公司 | Injection mold for processing automobile parts |
| 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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Address after: 315408 788 Tanjialing West Road, Yuyao City, Ningbo City, Zhejiang Province Applicant after: Shentong Science and Technology Group Co., Ltd. Address before: 315408 788 Tanjialing West Road, Yuyao City, Ningbo City, Zhejiang Province Applicant before: Ningbo Shentong Mould & Plastic Co., Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |