A kind of injection molding extruder head shifting closed anti-reversing clutch of block
Technical field
The present invention relates to the technical fields of plastic injection mold machinery, and in particular to a kind of injection molding extruder head shifting closed anti-reverse dress of block
It sets.
Background technique
The extruder head backstop of existing injection-moulding device is made of the check ring that two end faces are plane, and there are many
Defect, for example, 1, due to end face material stock it is serious, cause non-return effect poor;2, because of no location structure, material grain direction is caused
The problems such as resistance is big.
Summary of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, providing that a kind of structure is simple, the good injection molding of non-return effect is squeezed out
Head moves the closed anti-reversing clutch of block.
In order to achieve the above objectives, the present invention provides a kind of injection molding extruder head move the closed anti-reversing clutch of block, including barrel,
Guide part and pushing screw rod;Guide part is made of the guiding main part of left part and the supporting block of right part;Supporting block is fixed on barrel
On intracavity sidewall;Pushing screw rod is arranged in the right side of guide part and the left side of pushing screw rod and is resisted against the right side of guide part
On;The central channel of cylinder channel-shaped is formed in the middle part of the right side of supporting block;Cylinder channel-shaped is formed on the left side wall of central channel
Center slide slot;The driver slot of cylinder channel-shaped is formed on the left side wall of center slide slot;Uniform circular on the side wall of central channel
The shifting chute of several rectangle channel-shaped is distributed with;The left end of shifting chute is connected to center slide slot, right end is through setting;Shifting chute
Running through to the left on the left side wall of outboard end has sizing material current groove;It is slided in shifting chute and is provided with the closing for blocking sizing material current groove shifting
Block;All closings move block synchronizing moving.
As a preferred embodiment of the above technical solution, newel is vertically and fixedly provided at the left side center of pushing screw rod;Newel
Right-to-left passes through central channel and center slide slot is articulated on the left side wall of driver slot;Center slide slot or so, which slides, to be provided with
Columned centre-drive block;The right end of centre-drive block is shaped to circular cone table top;Newel is located at the outer of the right end of driver slot
Support ring is formed on cylindrical surface;The external cylindrical surface right part of support ring is hinged with the mandril of several even circumferential distributions;Mandril
End face outside forms clump weight;The external cylindrical surface Right vertical of mandril forms tension spring support plate;The lower end of tension spring support plate
Tension spring is fixed on face;The lower end of tension spring is fixed on the right side of support ring;Clump weight is resisted against the left end of centre-drive block
On face;The inner end that closing moves block forms the conical surface with the cooperation of the circular conical surface of the right end of centre-drive block;Closing moves block
The inner end right end that is resisted against centre-drive block circular conical surface on;Several elastic telescopicing rod lists are provided on centre-drive block
Member;The right side of elastic telescopic bar unit is resisted against on the left side of pushing screw rod.
As a preferred embodiment of the above technical solution, clump weight is spherical in shape.
As a preferred embodiment of the above technical solution, the external cylindrical surface of support ring, which is located on the left of mandril, forms bending plate
Angle limit plate;The bending angle of angle limit plate is in obtuse angle.
As a preferred embodiment of the above technical solution, elastic telescopic bar unit includes left telescopic rod and right telescopic rod;Centre-drive
The right side of block forms several columned left telescopic chutes;Left telescopic rod is plugged in left telescopic chute;Setting in left telescopic chute
There is left pressure spring;The left end of left pressure spring is fixed on the left side wall of left telescopic chute, right end is fixed on the left side of left telescopic rod;It is left
Right telescopic chute is formed on the right side of telescopic rod;Right telescopic rod is plugged in right telescopic chute;Right pressure is provided in right telescopic chute
Spring;The left end of right pressure spring is fixed on the left side wall of right telescopic chute, right end is fixed on the left side of right telescopic rod.
As a preferred embodiment of the above technical solution, the left side inside that closing moves block forms driving supporting block;Driving support
The inner end of block forms the conical surface concordant with the closing shifting inner end of block;Driving supporting block is resisted against centre-drive block
On the circular conical surface of right end;The right end of the side wall of center slide slot forms the escape groove with driving supporting block cooperation.
As a preferred embodiment of the above technical solution, the outboard end that closing moves block is shaped to left wide right narrow conical surface.
The beneficial effects of the present invention are: simple and effective, when pushing screw rod rotates, it is current that closing shifting block automatically opens sizing material
Slot;When pushing screw rod is stopped rotating, closing moves block self-closed sizing material current groove, and sizing material is avoided to reversely flow back towards barrel.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of section of the invention;
Fig. 2 is the structural schematic diagram of the partial enlargement of A in Fig. 1 of the invention;
Fig. 3 is the structural schematic diagram of the partial enlargement of B-B in Fig. 1 of the invention.
In figure, 10, barrel;20, guide part;200, central channel;201, shifting chute;202, sizing material current groove;203, it drives
Slot;204, center slide slot;205, escape groove;21, it is oriented to main part;22, supporting block;23, centre-drive block;230, left flexible
Slot;231, left pressure spring;232, left telescopic rod;2320, right telescopic chute;233, right pressure spring;234, right telescopic rod;24, closing moves block;
241, supporting block is driven;30, pushing screw rod;31, newel;311, support ring;312, angle limit plate;32, mandril;321, it draws
Spring support plate;33, clump weight;34, tension spring.
Specific embodiment
As shown in FIG. 1 to 3, a kind of injection molding extruder head moves the closed anti-reversing clutch of block, including barrel 10,20 and of guide part
Pushing screw rod 30;Guide part 20 is made of the guiding main part 21 of left part and the supporting block 22 of right part;Supporting block 22 is fixed on barrel
On 10 intracavity sidewall;Pushing screw rod 30 is arranged in the right side of guide part 20 and the left side of pushing screw rod 30 and is resisted against guiding
On the right side of part 20;The central channel 200 of cylinder channel-shaped is formed in the middle part of the right side of supporting block 22;The left side of central channel 200
The center slide slot 204 of cylinder channel-shaped is formed on wall;The driving of cylinder channel-shaped is formed on the left side wall of center slide slot 204
Slot 203;The shifting chute 201 of several rectangle channel-shaped is distributed in uniform circular on the side wall of central channel 200;The left end of shifting chute 201
It is connected to center slide slot 204, right end is through setting;Running through to the left on the left side wall of the outboard end of shifting chute 201 has sizing material logical
Row slot 202;It is slided in shifting chute 210 and is provided with the closing for blocking sizing material current groove 202 shifting block 24;It is synchronous that all closings move block 24
It is mobile.
As shown in FIG. 1 to 3, newel 31 is vertically and fixedly provided at the left side center of pushing screw rod 30;Newel 31 is certainly
A dextrad left side passes through central channel 200 and center slide slot 204 is articulated on the left side wall of driver slot 203;Center slide slot 204 or so
It slides and is provided with columned centre-drive block 23;The right end of centre-drive block 23 is shaped to circular cone table top;Newel 31 is located at
Support ring 311 is formed on the external cylindrical surface of the right end of driver slot 203;The external cylindrical surface right part of support ring 311 is hinged with several
The mandril 32 of even circumferential distribution;The end face outside of mandril 32 forms clump weight 33;The external cylindrical surface Right vertical of mandril 32
Form tension spring support plate 321;Tension spring 34 is fixed on the lower end surface of tension spring support plate 321;The lower end of tension spring 34 is fixed on branch
On the right side of pushing out ring 311;Clump weight 33 is resisted against on the left side of centre-drive block 23;Closing moves the inner end molding of block 24
There is the conical surface with the cooperation of the circular conical surface of the right end of centre-drive block 23;The inner end that closing moves block 24 is resisted against centre-drive
On the circular conical surface of the right end of block 23;Several elastic telescopic bar units are provided on centre-drive block 23;Elastic telescopic bar unit
Right side is resisted against on the left side of pushing screw rod 30.
As shown in Figure 1 and Figure 2, clump weight 33 is spherical in shape.
As shown in Figure 1 and Figure 2, the left side that the external cylindrical surface of support ring 311 is located at mandril 32 forms the angle of bending plate
Limit plate 312;The bending angle of angle limit plate 312 is in obtuse angle.
As shown in Figure 1 and Figure 2, elastic telescopic bar unit includes left telescopic rod 232 and right telescopic rod 234;Centre-drive block 23
Right side form several columned left telescopic chutes 230;Left telescopic rod 232 is plugged in left telescopic chute 230;Left telescopic chute
Left pressure spring 231 is provided in 230;The left end of left pressure spring 231 is fixed on the left side wall of left telescopic chute 230, right end is fixed on a left side
On the left side of telescopic rod 232;Right telescopic chute 2320 is formed on the right side of left telescopic rod 232;Right telescopic rod 234 is plugged in
In right telescopic chute 2320;Right pressure spring 233 is provided in right telescopic chute 2320;The left end of right pressure spring 233 is fixed on right telescopic chute
On 2320 left side wall, right end is fixed on the left side of right telescopic rod 234.
As shown in Figure 1 and Figure 2, the left side inside that closing moves block 24 forms driving supporting block 241;Drive supporting block 241
Inner end form and move the concordant conical surface in the inner end of block 24 with closing;Driving supporting block 241 is resisted against centre-drive
On the circular conical surface of the right end of block 23;The right end of the side wall of center slide slot 204 forms the evacuation cooperated with driving supporting block 241
Slot 205.
As shown in FIG. 1 to 3, the outboard end that closing moves block 24 is shaped to left wide right narrow conical surface.
Move the working principle of the closed anti-reversing clutch of block:
When extruder head stops working, pushing screw rod 40 is stopped rotating, and the centrifugal force acted on clump weight 33 becomes smaller gradually,
On the left side that clump weight 33 is resisted against centre-drive block 23 under the action of tension spring 34 and overcome elastic telescopic bar unit
Active force drives centre-drive block 23 to move right, during centre-drive block 23 moves right, closing move block 24 along
Shifting chute 201 is displaced outwardly, and when centre-drive block 23 is in right end, closing moves block 24 and closes sizing material current groove 202, this
Sample sizing material can not reversely flow back towards in barrel 10;
When extruder head stops working, pushing screw rod 40 rotates, and the centrifugal force acted on clump weight 33 becomes larger gradually, counterweight
Block 33 leaves on the left side of centre-drive block 23 under the action of overcoming tension spring 34, in this way the active force in elastic telescopic bar unit
Under drive centre-drive block 23 to be moved to the left, closing move 24 non-stop layer drive block 23 of block support, enter sizing material extruding under,
Closing shifting block 24 moves along slot 201 and moves inward, and sizing material current groove 202 is opened, and such sizing material can squeeze out.
The above content is only better embodiment of the invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to this hair
Bright limitation.