Summary of the invention
The present invention for overcome the deficiencies in the prior art, provides a kind of long service life, demoulding smoothly injection molding demoulding mould
To achieve the goals above, the invention adopts the following technical scheme: a kind of injection molding demoulding mould, including upper mold, under
Mould is set to type core and thimble between upper and lower mould；Primary demolded parts are equipped between the type core and the lower die；The lower die
It is equipped with thimble positioning element, two stage mold unloading component is equipped between the thimble positioning element and the type core；It is set on the type core
There is the injection molding cavity passed through for thimble, the thimble is equipped with the fastener matched with workpiece；In the thimble and the injection molding cavity
The power-assist structure for reducing frictional force between the two is equipped between wall；When carrying out stripping operation, the primary demolded parts
The fastener and the workpiece is driven to be detached from first, two stage mold unloading component driving workpiece and the injection molding cavity are detached from later.This hair
Bright setting primary and secondary demolded parts, so as to workpiece realize step demoulding processing, for the first time demould when, control fastener with
Workpiece is first detached from, and controls workpiece again later and injection molding cavity is detached from, and when fastener and workpiece demould, workpiece remains motionless, and pushes up
Needle vertical shift guarantees fastener vertically by detaching on workpiece；For comparing the case where traditional travelling workpiece realizes demoulding,
The case where fastener is less prone to bending or fractures, is hardly damaged, long service life；And since workpiece uses secondary stripping operation,
Every time when demoulding, pulling force, active force for receiving between mold and workpiece etc. are all smaller, and workpiece shaping integrity degree is high, burn failure
Rate is low；The setting of power-assist structure, so that the frictional force between thimble and injection molding cavity is effectively reduced, thus in jacking workpiece
When, more smoothly and rapid, stripping result is good.
Further, the primary demolded parts include support block, demoulding column, match with the demoulding column on type core
Movable chamber, the demoulding chamber on the support block and the elastic component intracavitary set on demoulding；The demoulding column lower part and the lower die phase
Even, the top for demoulding column is arranged in the movable chamber；When demoulding for the first time, lower die is moved downward with respect to type core, at this time support block
It is moved in movable chamber, and then maintenance core, on motionless position, thimble follows lower die to move down together at this time, from
And the fastener of thimble end and workpiece are disengaged, realize the demoulding between thimble and workpiece.
Further, the elastic component is sheathed on outside the demoulding column, which acts on the type core, separately
One end acts on demoulding bottom of chamber wall；Elastic component can give always type core upward support force during lower die moves down,
The type core of avoiding follows lower die to move downwardly together.
Further, the through slot matched with the demoulding column is equipped in the support block, which is equipped with and institute
The first anti-falling piece that movable chamber matches is stated, lower part is equipped with the second anti-falling piece；The support block is equipped with and second anti-falling piece
The holding tank matched, the holding tank are connected with the through slot, and second anti-falling piece is embedded in the holding tank.
Further, the thimble positioning element include the first positioning plate in the lower die and with first positioning
The second positioning plate that plate is detachably connected is equipped with support column between first positioning plate and the type core；Pass through support column reality
Now the support of type core is positioned.
Further, the two stage mold unloading component includes the opening passed through on second positioning plate for the thimble
It slot, the through-hole passed through on first positioning plate for the thimble, the elastic telescopic part in the open slot and is set to
The limiting section that thimble lower part is matched with the lower die；During lower die moves down, elastic telescopic part continues to the second positioning plate
Downward support force is acted on, the positioning of the support to type core is further increased, prevents type core from moving when lower die is mobile, guarantee
Thimble and workpiece realize fast demoulding；When lower die moves to the first anti-falling piece and inconsistent movable chamber on demoulding column, demoulding
Column will start band ejector half core and move down, and when type core and positioning element are moved to inconsistent with mandril, mandril is by the second positioning
Plate jacks up upwards, and the second positioning plate drives the first positioning plate and support column to move up, so that the top of support column will be extend out to
Type core upper surface, and then by workpiece by being jacked up on type core, so that disengaging between workpiece and injection molding cavity, realize secondary demoulding；Due to
The setting of elastic telescopic part, so that mandril, when jacking positioning element, elastic telescopic part can also give positioning element upward work
Firmly, it so that the jacking of positioning element is more smoothly, demoulds more smooth.
Further, the support column lower part is equipped with the anti-delinking part matched with first positioning plate；Pass through anti-delinking part
Cooperation, guarantee that support column and the first positioning plate can be realized synchronizing moving, during jacking workpiece, support column will not be by
Deviate from first positioning plate.
Further, a mandril is equipped with below the lower die.
Further, the power-assist structure includes multiple ball cavities on the thimble and in the ball cavity
Ball, the ball part extend out to the thimble outer wall；By the setting of ball, high degree reduces support column and note
The contact area between chamber is moulded, to reduce frictional force between the two, support column along type core during moving up, ball
It will roll, further decrease frictional force between the two, promote the speed of demoulding.
Further, the fastener is detachably connected by connection structure and the thimble；By between fastener and thimble
Be detachably connected, when being bent or fractureing occur in fastener, individually fastener can be replaced, it is whole to extend equipment
Further, the connection structure includes the connector sleeve being connected with the fastener, set on the interior spiral shell of connector sleeve inner wall
Line and the external screw thread in the thimble external wall of upper portion；By the fit system being spirally connected, structure is simple, convenient disassembly, maintenance
It is easy to operate.
In conclusion the invention has the following advantages that setting primary and secondary demolded parts, divide so as to realize to workpiece
Demoulding processing is walked, since workpiece uses secondary stripping operation, every time when demoulding, the pulling force that is received between mold and workpiece, effect
Power etc. is all smaller, and workpiece shaping integrity degree is high, and burn failure rate is low;The setting of power-assist structure, so that between thimble and injection molding cavity
Frictional force effectively reduced, so that more smoothly and rapid, stripping result is good when jacking workpiece.
In order to make those skilled in the art better understand the present invention program, below in conjunction in the embodiment of the present invention
Attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.
As shown in Figs. 1-2, a kind of injection molding demoulding mould, including upper mold 1, lower die 2, the type core 3 between upper and lower mould and
Thimble 4；Primary demolded parts are equipped between the type core 3 and the lower die 2；The lower die 2 is equipped with thimble positioning element 5,
Two stage mold unloading component is equipped between the thimble positioning element 5 and the type core 3；It is worn specifically, the type core 3 is equipped with for thimble
The injection molding cavity 31 crossed, the thimble 4 are equipped with the fastener 41 that matches with workpiece, the fastener 41 by connection structure with it is described
Thimble 4 is detachably connected；The connection structure includes the connector sleeve 42 being connected with the fastener 41, in 42 inner wall of connector sleeve
Screw thread and the external screw thread in 4 external wall of upper portion of thimble, connector sleeve lower part are to be arranged in opening；Pass through matching for internal and external threads
Conjunction, realization fastener and thimble are spirally connected, convenient for replacing to fastener；When carrying out stripping operation, the primary demolded parts
The fastener 41 is driven to be detached from the workpiece first, two stage mold unloading component driving workpiece and the injection molding cavity 31 are detached from later；
Secondary stripping operation in this way avoids the bending or fracture that cause fastener during demoulding.
Specifically, the primary demolded parts include support block 61, demoulding column 62, movable chamber 63, demoulding chamber 64 and elasticity
Part 65, the support block 61 are set between type core and lower die, and the demoulding column 62 is arranged in the support block 61, and the movable chamber 63 is set
In matching on type core with the demoulding column, it is equipped with the through slot matched with the demoulding column in the support block 61, on the demoulding column
End is penetrated after through slot to movable chamber 63, and demoulding 62 lower part of column is connected with the lower die 2；Further, the demoulding column 62
Top is equipped with the first anti-falling piece 621 matched with the movable chamber, and lower part is equipped with the second anti-falling piece 622, first anti-falling piece
621 and second anti-falling piece 622 be respectively demould 62 outer wall of column direct out the flange extended to form；The demoulding chamber 64 demoulds chamber
64, the elastic component 65 is spring, and it is intracavitary which is set to demoulding, and elastic component 65 is sheathed on outside the demoulding column 62, should
65 one end of elastic component acts on the type core 3, and the other end acts on 64 bottom wall of demoulding chamber；Preferably, the support block
61 are equipped with the holding tank matched with second anti-falling piece 622, which is connected with the through slot, and described second is anti-
De- part 622 is embedded in the holding tank.
The thimble positioning element 5 includes the first positioning plate 51 and the second positioning plate 52, first positioning plate 51 and the
Two positioning plates 52 are set in the lower die, and first positioning plate and the second positioning plate 52 are removably attachable to one by screw
It rises, and is equipped with support column 7 between first positioning plate 51 and the type core 3；The two stage mold unloading component include open slot 81,
Through-hole, elastic telescopic part 82 and limiting section 83；The open slot 81 is set on second positioning plate 52, for the thimble
It passing through, the elastic telescopic part 82 is spring, which is set in the open slot 81, the one of elastic telescopic part 82
End acts on open slot and determines wall, and the other end acts in lower die；The through-hole is set on first positioning plate 51, for described
Thimble passes through；The limiting section 83 is set to thimble lower part, directs out for thimble lower sides and extends to form flange, the limiting section
Can match with the lower die prevents thimble from moving up disengagement lower die；
Preferably, 7 lower part of support column is equipped with the anti-delinking part 71 matched with first positioning plate, the anti-delinking part
71 direct out the circle protrusion extended to form for 7 lower part of support column, which is embedded in the first positioning plate；Further
, a mandril 9 is equipped with below the lower die 2, which is the mandril of injection molding machine, is no longer excessively repeated for the prior art；Injection molding
The other structures of mould are that the prior art may be implemented, no longer excessively repeat.
In order to reduce the frictional force between 31 inner wall of thimble 4 and the injection molding cavity, we are in thimble 4 and the injection molding cavity 31
Power-assist structure is provided between inner wall；The power-assist structure includes multiple ball cavities 101 on the thimble and is set to the rolling
The intracavitary ball 102 of pearl, the ball 102 are made of stainless steel, and the opening of ball cavity 101 is located on thimble side wall, opening
Size is less than the diameter of ball, to can guarantee that ball part extend out to 4 outer wall of thimble, but not drops out；Further,
Settable through slot is connected to the ball cavity at the top of thimble, and ball can be put by the through slot to ball cavity.
Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment should fall within the scope of the present invention.