CN212603153U

CN212603153U - Inner core-pulling mechanism of injection mold

Info

Publication number: CN212603153U
Application number: CN202021062224.2U
Authority: CN
Inventors: 解富清; 张云飞; 江挺
Original assignee: Yonggao Co Ltd
Current assignee: Era Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-02-26
Anticipated expiration: 2030-06-10

Abstract

The utility model provides an injection mold's interior mechanism of loosing core belongs to mould technical field. The technical problem that the process is complex when the existing injection mold is used for injecting the valve body product is solved. The inner core-pulling mechanism of the injection mold comprises a fixed mold and a movable mold, a first mold core and a second mold core are arranged between the movable mold and the fixed mold, the end part of the second mold core, which is close to the first mold core, is columnar and is provided with a slide hole extending along the radial direction, a chamfer mold core capable of sliding along the slide hole in a reciprocating manner is embedded in the slide hole, the outer end of the chamfer mold core is provided with an annular chamfer molded surface, the end part of the first mold core is fixedly provided with a first inclined guide pillar, the chamfer mold core is provided with a slide way capable of being matched with the first inclined guide pillar, the chamfer mold core can be driven to slide along the slide hole in a reciprocating manner under the action of the inner side wall of the slide way when the first inclined guide pillar moves left and right, the outer end of the chamfer mold core stretches. The utility model discloses production efficiency is higher and the precision is better.

Description

Inner core-pulling mechanism of injection mold

Technical Field

The utility model belongs to the technical field of injection mold, a mechanism of loosing core in injection mold is related to.

Background

The injection mold is a tool for producing plastic products, generally comprises a movable mold and a fixed mold, wherein the movable mold and the fixed mold are closed to form a runner system and a cavity of the plastic products during injection molding. During injection molding, the mold is clamped on an injection molding machine, molten plastic is injected into the cavity and is cooled and molded in the cavity, meanwhile, the molten plastic is also cooled in the runner system to form runner system condensate, the movable mold and the fixed mold are separated after the plastic product is molded, the plastic product is ejected out of the driven mold cavity through the ejection system and leaves the mold, finally, the movable mold and the fixed mold are closed again to perform next injection molding, and the whole injection molding process is performed circularly.

Valve class product has the wide application in production and construction process, and valve class product need just can assemble into a product at valve body internal assembly case, need put into this hole with the club when having a club hole assembly inside the product, current product structure all adopts straight hole shape state basically, need take the chamfer sword earlier by the installer before the installation club to carry out the chamfer operation around the hole, so that the club can do smooth installation in the club hole, a process has been increased during the installation to this kind of structure, and the chamfer size of every workman is also different, the installation effect that causes is also different.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide an injection mold's interior mechanism of loosing core, the utility model aims to solve the technical problem that: the existing injection molding valve body needs manual work to carry out an inner chamfering process, and is low in efficiency and poor in precision.

The purpose of the utility model can be realized by the following technical proposal:

an inner core-pulling mechanism of an injection mold comprises a fixed mold and a movable mold, wherein a first mold core and a second mold core which can respectively slide and demold towards the left and right directions are arranged between the movable mold and the fixed mold, it is characterized in that the end part of the second core close to the first core is columnar and is provided with a sliding hole extending along the radial direction, a chamfer angle core which can slide along the slide hole in a reciprocating way is embedded in the slide hole, the outer end of the chamfer angle core is provided with an annular chamfer angle molded surface, the end part of the first mold core is fixedly provided with a first inclined guide post, the chamfer mold core is provided with a slideway which can be matched with the first inclined guide post, when the inclined guide post moves left and right, the inclined guide post can drive the chamfering mold core to slide along the slide hole in a reciprocating way through the action of the inclined guide post and the inner side wall of the slide way, when the first core and the second core are abutted, the outer end of the chamfer core extends out of the slide hole, when the inclined guide post is separated from the slide way, the outer end of the chamfer angle mold core retracts into the slide way.

The fixed die, the movable die, the first core and the second core form a die cavity for injection molding of the valve body, and the first core and the second core are responsible for forming a channel of the valve body. The end part of the core II close to the core I is provided with a slide hole which is radially opened, a chamfer core is embedded in the slide hole in a sliding manner, the outer end of the chamfer core is provided with an annular chamfer profile which is responsible for chamfer forming of a ball rod hole in the valve body, an inclined guide post is fixedly arranged at the end part of the core I, a slide way which can be matched with the inclined guide post I is arranged on the chamfer core, so that the chamfer core can be driven to slide along the slide hole in a reciprocating manner by acting component force with the inner side wall of the slide way when the inclined guide post I moves left and right, the outer end of the chamfer core is driven to extend out of the slide hole to participate in the forming of the valve body when the core I and the core II abut against the mold core to be matched, the inclined guide post I drives the inclined guide post I to separate from the slide way to obliquely drive the outer end of the chamfer core to retract into the slide hole when the, thereby realize the interior chamfer structure of valve body and guarantee higher product uniformity through once only moulding plastics.

In the internal core-pulling mechanism of the injection mold, the opening of the slide hole is upward, and when the inclined guide post is separated from the slide way, the inner end of the chamfer core is abutted against the bottom of the slide hole. The opening through setting up the slide opening extends upwards, can avoid like this that the back chamfer core of drawing of patterns is accomplished to slide by oneself and influence the compound die, and the inner of chamfer core leans on with the bottom of slide opening when further setting up oblique guide pillar one and breaking away from the slide, guarantees like this that oblique guide pillar one can be vertical just right with the entry of slide opening when the compound die.

In the internal core-pulling mechanism of the injection mold, the bottom of the sliding hole is provided with a special-shaped hole, the inner end of the chamfer core is provided with an inserting column which can be matched with the special-shaped hole, and when the inclined guide column is separated from the slide way, the inserting column is inserted into the special-shaped hole and forms circumferential positioning. Through set up the dysmorphism hole in the bottom of slide opening, make oblique guide pillar when breaking away from the slide the inner insert the post insert locate in the dysmorphism hole and form circumferential location, further guarantee like this before the compound die that the circumferential position of chamfer core is stable, and then guarantee that whole mould operation is normal accurate.

In the internal core-pulling mechanism of the injection mold, the inner side wall of the sliding hole is provided with a yielding groove, and when the first core and the second core abut against each other, the end part of the first inclined guide post extends out of the chamfering core and is positioned in the yielding groove. The inner side wall of the sliding hole is provided with the yielding groove, so that the end part of the first inclined guide post extends out of the chamfering core and is positioned in the yielding groove when the die assembly is in place, the first inclined guide post is fully contacted with the chamfering core, and the inclination of the first inclined guide post is reduced or the movement stroke of the chamfering core is increased.

In the internal core-pulling mechanism of the injection mold, the fixed mold is fixedly provided with a second inclined guide post which can drive the first core to pull the core when the mold is opened. The core I can be driven to loose core by the aid of the arrangement of the fixed die, so that the core I can be controlled to move leftwards by the aid of component force of the inclined guide post when the die is opened, die opening efficiency is improved, and sequence stability is guaranteed.

In foretell injection mold's interior mechanism of loosing core, through set up the straight tube core in the bottom of cover half, the shaping of valve body club hole straight tube section can be participated in to the straight tube core, makes the straight tube core can support with vertical chamfer core under the compound die state and lean on, does benefit to the length that reduces the chamfer core like this, reduces the demand to the motion stroke.

In the internal core-pulling mechanism of the injection mold, a driving oil cylinder capable of driving the second core to slide left and right is arranged on the outer side of the movable mold. The driving oil cylinder for controlling the second mold core is arranged on the outer side of the movable mold, so that the second mold core is independently controlled, and the smooth injection molding process is guaranteed.

In the internal core-pulling mechanism of the injection mold, the second mold core comprises a fixed mold core and a threaded mold core sleeved on the periphery of the fixed mold core, the slide hole is positioned on the fixed mold core, and a driving motor capable of driving the threaded mold core to perform demolding rotation relative to the fixed mold core is arranged on the second mold core. Through setting up core two and locating design core outlying screw core including deciding the core and overlapping, set up the rotatory drawing of patterns of driving motor control screw core at core two, do benefit to the drawing of patterns control that realizes threaded valve body like this, improve mould application scope.

Compared with the prior art, the utility model has the advantages as follows:

the valve body product that this mechanism was moulded plastics can reduce the installation procedure, the structure in ball pole hole has been changed, directly make injection moulding with the chamfer, increase a plane again below the bevel angle in addition, make and adopt the plane to fix a position from top to bottom between club and the valve body, make the locating position of club up lift and ball core between the location size increase, it has bigger contact surface to make the club rotate with ball core, adjustment through inner structure, the installation procedure has been reduced, the installation time has been reduced, the size that has realized the chamfer is unified, more make things convenient for the installation of club, installation efficiency reduction in production cost has been improved.

Drawings

Fig. 1 is a schematic sectional structure view of the internal core-pulling mechanism of the injection mold.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an exploded view of the inner core-pulling mechanism of the injection mold.

Fig. 4 is an exploded sectional view of the inner core-pulling mechanism of the present injection mold.

In the figure, 1, a fixed die; 2. moving the mold;

3. a first mold core; 31. a first inclined guide post;

4. a second mold core; 41. a slide hole; 42. a profiled hole; 43. a yielding groove; 44. fixing a mold core; 45. a threaded core;

5. chamfering the mold core; 51. chamfering the molded surface; 52. a slideway; 53. inserting a column;

6. a second inclined guide post; 7. a straight tube core; 8. a driving oil cylinder; 9. the motor is driven.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-4, the internal core pulling mechanism of the injection mold comprises a fixed mold 1 and a movable mold 2, a first mold core 3 and a second mold core 4 which can be respectively arranged on the left side and the right side are arranged between the movable mold 2 and the fixed mold 1, the end part of the second mold core 4 close to the first mold core 3 is columnar and is provided with a slide hole 41 which extends along the radial direction, the slide hole 41 is circular hole-shaped, a chamfering mold core 5 which can slide along the slide hole 41 in a reciprocating manner is embedded in the slide hole 41, the chamfering mold core 5 is columnar, the outer end of the chamfering mold core 5 is provided with an annular chamfering molded surface 51, the end part of the first mold core 3 is fixedly provided with a first inclined guide pillar 31, the chamfering mold core 5 is provided with a slide way 52 which can be matched with the first inclined guide pillar 31, the first inclined guide pillar 31 can drive the chamfering mold core 5 to slide along the slide hole 41 in a reciprocating manner by acting on the inner side wall of the slide way 52 when the, when the first inclined guide post 31 is separated from the slide way 52, the outer end of the chamfering core 5 retracts into the slide hole 41. The fixed die 1, the movable die 2, the first core 3 and the second core 4 form a die cavity for injection molding of the valve body, and the first core 3 and the second core 4 are responsible for channel molding of the valve body. The end part of the second mold core 4 close to the first mold core 3 is provided with a slide hole 41 which is radially opened, a chamfer mold core 5 is embedded in the slide hole 41 in a sliding way, the outer end of the chamfer mold core 5 is provided with an annular chamfer molding surface 51 which is responsible for chamfer molding of a ball rod hole in a valve body, the end part of the first mold core 3 is fixedly provided with a first inclined guide post 31, and the chamfer mold core 5 is provided with a slide way 52 which is matched with the first inclined guide post 31, so that the first inclined guide post 31 can drive the chamfer mold core 5 to slide along the slide hole 41 in a reciprocating way by acting component force with the inner side wall of the slide way 52 when moving left and right, when the first mold core 3 is abutted against the second mold core 4, the outer end of the chamfer mold core 5 is driven to extend out of the slide hole 41 to participate in the molding of the valve body, when the mold is opened, the first mold core 3 drives the first inclined guide post 31 to be separated from the slide way 52 to drive the outer end of the, realize smooth drawing of patterns to realize the interior chamfer structure of valve body and guarantee higher product uniformity through once only moulding plastics. Further, the opening of the slide hole 41 is upward, and the inner end of the chamfering core 5 abuts against the bottom of the slide hole 41 when the first angle guide post 31 is disengaged from the slide rail 52. The opening of the slide hole 41 extends upwards, so that the phenomenon that the die assembly is influenced by the fact that the chamfering mold core 5 slides automatically after the die stripping is finished can be avoided, when the inclined guide pillar I31 is further arranged to be separated from the slide rail 52, the inner end of the chamfering mold core 5 is abutted to the bottom of the slide hole 41, and therefore the inclined guide pillar I31 can be vertically opposite to the inlet of the slide hole 41 when the die assembly is carried out. Preferably, the bottom of the slide hole 41 is provided with a profile hole 42, the inner end of the chamfering core 5 is provided with an inserting column 53 which can be matched with the profile hole 42, and the inserting column 53 is inserted into the profile hole 42 and forms circumferential positioning when the first inclined guide column 31 is separated from the slide way 52. Through set up dysmorphism hole 42 in the bottom of slide opening 41, dysmorphism hole 42 is the multilateral hole, makes oblique guide pillar one 31 break away from when slide 52 the interior post 53 of inserting of chamfer core 5 inner insert and locate in dysmorphism hole 42 and form circumferential location, further guarantees like this that the circumferential position of chamfer core 5 is stable before the compound die, and then guarantees that whole mould operation is normal accurate. The inner side wall of the slide hole 41 is provided with a relief groove 43, and when the first core 3 abuts against the second core 4, the end part of the first inclined guide post 31 extends out of the chamfering core 5 and is positioned in the relief groove 43. Through set up the groove 43 of stepping down at the inside wall of slide opening 41, make the compound die when target in place the tip of oblique guide pillar one 31 stretch out chamfer core 5 and lie in the groove 43 of stepping down, guarantee like this that oblique guide pillar one 31 fully contacts with chamfer core 5, do benefit to in addition and reduce the inclination of oblique guide pillar or increase the motion stroke of chamfer core 5.

As shown in figure 1, an inclined guide post II 6 capable of driving a core I3 to loose core when the mold is opened is fixedly arranged on the fixed mold 1. The lower end of the second inclined guide post 6 is inserted into the first core 3, the first core 3 can be driven to loose core by relative motion of the fixed die 1 and the movable die 2, and therefore the second inclined guide post 6 can control the first core 3 to move leftwards through component force during die opening, die opening efficiency is improved, and sequence stability is guaranteed. The bottom of the fixed die 1 is provided with a straight tube core 7, the chamfer angle core 5 is vertically arranged, and the straight tube core 7 can be abutted against the outer end face of the chamfer angle core 5 when the die is closed. Through setting up straight tube core 7 in the bottom of cover half 1, straight tube core 7 can participate in the shaping of valve body club hole straight tube section, makes straight tube core 7 can support with vertical chamfer core 5 under the compound die state and lean on, does benefit to the length that reduces chamfer core 5 like this, reduces the demand to the motion stroke. And a driving oil cylinder 8 capable of driving the second core 4 to slide left and right is arranged on the outer side of the movable mold 2. The driving oil cylinder 8 for controlling the second mold core 4 is arranged on the outer side of the movable mold 2, so that the second mold core 4 is independently controlled, and the smooth injection molding process is ensured. The second mold core 4 comprises a fixed mold core 44 and a threaded mold core 45 sleeved on the periphery of the fixed mold core 44, the slide hole 41 is positioned on the fixed mold core 44, and the second mold core 4 is provided with a driving motor 9 capable of driving the threaded mold core 45 to demould and rotate relative to the fixed mold core 44. Through setting up second core 4 and including deciding core 44 and the peripheral screw core 45 of core 44 is located to the cover, set up driving motor 9 control screw core 45 rotatory drawing of patterns at second core 4, do benefit to the drawing of patterns control that realizes the threaded valve body like this, improve mould application scope.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An inner core-pulling mechanism of an injection mold comprises a fixed mold (1) and a movable mold (2), wherein a first mold core (3) and a second mold core (4) which can respectively slide and demold in the left-right direction are arranged between the movable mold (2) and the fixed mold (1), the inner core-pulling mechanism is characterized in that the end part of the second mold core (4) close to the first mold core (3) is columnar and is provided with a slide hole (41) extending along the radial direction, a chamfer mold core (5) capable of sliding along the slide hole (41) in a reciprocating manner is embedded in the slide hole (41), the outer end of the chamfer mold core (5) is provided with an annular chamfer molded surface (51), the end part of the first mold core (3) is fixedly provided with a first inclined guide pillar (31), the chamfer mold core (5) is provided with a slide way (52) capable of being matched with the first inclined guide pillar (31), and the chamfer mold core (5) can be driven to slide along the slide hole (41) in a reciprocating manner under the action with the inner side, when the first core (3) abuts against the second core (4), the outer end of the chamfering core (5) extends out of the sliding hole (41), and when the first inclined guide post (31) is separated from the sliding way (52), the outer end of the chamfering core (5) retracts into the sliding hole (41).

2. An internal core-pulling mechanism of an injection mold according to claim 1, characterized in that the opening of the slide hole (41) is upward, and the inner end of the chamfer core (5) abuts against the bottom of the slide hole (41) when the first angle guide post (31) is disengaged from the slide (52).

3. An inner core pulling mechanism of an injection mold according to claim 2, characterized in that the bottom of the slide hole (41) is provided with a profiled hole (42), the inner end of the chamfering core (5) is provided with an inserting column (53) which can be matched with the profiled hole (42), and the inserting column (53) is inserted into the profiled hole (42) and forms circumferential positioning when the first inclined guide column (31) is separated from the slide way (52).

4. An inner core-pulling mechanism of an injection mold according to claim 1, characterized in that the inner side wall of the slide hole (41) is provided with a relief groove (43), and when the first core (3) abuts against the second core (4), the end of the first inclined guide post (31) extends out of the chamfering core (5) and is located in the relief groove (43).

5. An injection mold inner core-pulling mechanism according to claim 1, 2, 3 or 4, characterized in that the fixed mold (1) is fixedly provided with a second inclined guide post (6) capable of driving the first core (3) to perform core-pulling when the mold is opened.

6. An injection mold internal core pulling mechanism according to claim 1, 2, 3 or 4, characterized in that the bottom of the fixed mold (1) is provided with a straight tube core (7), the chamfer angle core (5) is vertically arranged, and the straight tube core (7) can be abutted against the outer end surface of the chamfer angle core (5) when the mold is closed.

7. The inner core-pulling mechanism of the injection mold according to claim 1, 2, 3 or 4, characterized in that a driving oil cylinder (8) capable of driving the second core (4) to slide left and right is arranged on the outer side of the movable mold (2).

8. The internal core pulling mechanism of the injection mold according to claim 1, 2, 3 or 4, wherein the second mold core (4) comprises a fixed mold core (44) and a threaded mold core (45) sleeved on the periphery of the fixed mold core (44), the slide hole (41) is positioned on the fixed mold core (44), and a driving motor (9) capable of driving the threaded mold core (45) to perform demolding rotation relative to the fixed mold core (44) is arranged on the second mold core (4).