CN213006324U - Injection mold core-pulling mechanism and injection mold - Google Patents

Abstract

The utility model provides an injection mold mechanism of loosing core and injection mold, the mechanism of loosing core is including the core pulling rod, smooth core, a fixed base, core pulling sleeve and spacing subassembly, the axial of core pulling rod sets up with the mould direction slope that opens and shuts, the core pulling rod runs through core pulling sleeve and sets up, the second end of core pulling rod is provided with first slide rail, first guide way and second guide way have been seted up to the fixing base, first slide rail is located first guide way, the first end of core pulling sleeve is provided with the second slide rail, the second slide rail is located the second guide way, the second guide way is highly greater than the height of second slide rail at core pulling rod axial, spacing subassembly includes spacing mold insert, drive mold insert and elastic component, the periphery wall of core pulling sleeve is seted up flutedly, the spacing portion of spacing mold insert can be inserted in the recess, the elastic component forces spacing portion to be close to the recess removal, the drive mold insert can force spacing portion to keep away. The core-pulling mechanism ensures that the core-pulling sleeve is kept still during the first core-pulling, prevents pulling damage to products, and has high yield, high production efficiency and high precision.

Description

Injection mold core-pulling mechanism and injection mold

Technical Field

The utility model belongs to the technical field of injection moulding production technique and specifically relates to an injection mold mechanism of loosing core and have this injection mold mechanism of loosing core injection mold and relate to.

Background

An injection mould is a tool for producing plastic products, and particularly relates to a formed product which is obtained by injecting heated and melted plastics into a mould cavity from an injection molding machine at high pressure and cooling and solidifying the plastics.

Referring to a prior art cap 1 shown in fig. 1 and 2, a side surface 11 of the cap 1 protrudes with an obliquely arranged cylindrical part 12, and a circumferential wall of the cylindrical part 12 is provided with a buckle 13, so that the obliquely arranged cylindrical part 12 and the buckle 13 form two inverted structures in two different directions, and correspondingly, an injection mold for injection molding the cap 1 needs to be designed with a core-pulling mechanism. However, when the conventional core pulling mechanism performs the first core pulling on the buckle 13, the second core pulling insert of the cylindrical portion 12 is easily driven, so that the product is damaged by pulling, and the production quality is unstable. In addition, the existing core pulling mechanism controls the core pulling action sequence by depending on the reset spring for a long time, and the condition of spring failure can occur in the production process, so that the production cannot be carried out, the reset spring needs to be replaced, the production is suspended, the production cost is seriously increased, and the production efficiency is low.

Disclosure of Invention

In order to realize the utility model discloses a first purpose, the utility model provides an injection mold mechanism of loosing core that production efficiency is high, the precision is high and the yields is high.

In order to realize the utility model discloses a second purpose, the utility model provides an injection mold with above-mentioned injection mold mechanism of loosing core.

In order to realize the first purpose of the utility model, the utility model provides an injection mold core pulling mechanism, which comprises a core pulling rod, a sliding core, a fixed seat, a core pulling sleeve and a limit component, wherein the axial direction of the core pulling rod and the mold opening and closing direction of the injection mold are obliquely arranged, the core pulling rod can be glidingly arranged to penetrate through the core pulling sleeve, the peripheral wall of the first end of the core pulling rod is provided with a first inclined plane for the sliding core to glide and match, the first inclined plane and the axial direction of the core pulling rod are obliquely arranged, the first inclined plane is convexly provided with a dovetail type guide strip extending along the oblique direction, the sliding core is provided with a dovetail groove, the guide strip is positioned in the dovetail groove, the second end of the core pulling rod is provided with a first slide rail, the fixed seat is provided with a first guide groove and a second guide groove which extend in parallel directions, the first slide rail can be glidingly positioned in the first guide groove, the extend direction, the first end that the cover of loosing core is close to the core rod second end is provided with the second slide rail, and the second slide rail can be located the second guide way with sliding, and the second guide way highly is greater than the height of second slide rail at the axial of core rod, and spacing subassembly includes spacing mold insert, drive mold insert and elastic component, and the periphery wall of core rod cover is seted up flutedly, and the spacing portion of spacing mold insert can be inserted in the recess, and the elastic component forces spacing portion to be close to the recess and removes, and the drive mold insert can force spacing portion to keep away from the recess and remove.

According to the scheme, in the first core pulling working process of stable realization of the core pulling rod and the sliding core, the driving insert can be moved away from the groove at the position-limiting part, but under the action of forcing the position-limiting part to be close to the groove to move by the elastic piece, the position-limiting part of the position-limiting insert is not completely separated from the groove, so that the core pulling sleeve is ensured to be kept still in the first core pulling working process, the core pulling sleeve can not be driven by friction force, and the product is prevented from being damaged by pulling. After the core pulling rod and the sliding core stably realize the first core pulling work, the core pulling sleeve performs the second core pulling work again. The utility model discloses injection mold mechanism of loosing core novel structure, the processing cost is low, and it is efficient to make a mould, and production efficiency is high, and the production precision is high, can smoothly demould effectively, and the yields of product is high.

The injection mold core pulling mechanism further comprises a holding insert, the sliding core is located on a second end face, close to the first end of the core pulling rod, of the core pulling sleeve, the holding insert is sleeved at the first end of the core pulling rod and located on the second end face of the core pulling sleeve, a through groove penetrating the holding insert is formed in the holding insert, and the sliding core is movably located in the through groove.

The third guide groove is communicated with the through groove and extends outwards in the radial direction of the holding insert, and a guide sliding block is convexly arranged on the side face, opposite to the dovetail groove, of the sliding core and movably located in the third guide groove.

The second end surface of the holding insert is provided with a fourth guide groove, the fourth guide groove is communicated with the through groove in the circumferential direction of the holding insert, the side surface of the sliding core, which is close to the second end surface of the core pulling sleeve, is convexly provided with a third slide rail, and the third slide rail is movably positioned in the fourth guide groove.

The elastic piece is a reset spring, the limiting insert is provided with a matching groove which runs through the limiting insert, the driving insert can movably run through the matching groove, the reset spring is pressed on the pressed side face, opposite to the limiting portion, of the limiting insert and forces the limiting portion to move close to the groove, a driving portion is arranged on the side face, close to the reset spring, of the driving insert in a protruding mode, the driving portion can be pressed on the side face, close to the reset spring, of the matching groove in a supporting mode and forces the limiting portion to move away from the groove.

According to a further scheme, the limiting assembly further comprises a locking insert, the locking insert is provided with a fifth guide groove extending along the moving direction of the limiting part, and one side, opposite to the limiting part, of the limiting insert is movably inserted into the fifth guide groove.

According to a further scheme, an assembly through hole communicated with the fifth guide groove is formed in one end face of the locking insert, a fastener is installed in the assembly through hole, a stopping groove is formed in the end face, close to the assembly through hole, of the limiting insert, the stopping groove extends in the moving direction of the limiting portion, and one end of the fastener is inserted into the stopping groove.

In order to realize the utility model discloses a second purpose, the utility model provides an injection mold, including the mechanism of loosing core, the mechanism of loosing core is foretell injection mold mechanism of loosing core.

The injection mold further comprises a rear mold core, a rear mold plate, a supporting plate, an equal-height screw and an auxiliary spring, wherein the rear mold core is arranged on a first end surface of the rear mold plate, the supporting plate can be movably located at a second end of the rear mold plate along the mold opening and closing direction, two ends of the auxiliary spring are respectively abutted and pressed between the rear mold plate and the supporting plate, a fixed seat is arranged on the supporting plate, a core pulling sleeve movably penetrates through the rear mold plate and is connected with the supporting plate, a rear mold cavity can be formed among the rear mold core, a first end of the core pulling rod, a sliding core and a second end of the core pulling sleeve, the equal-height screw is provided with a rod part and a head part which are connected, a limiting hole and a guide hole which are communicated are arranged on the rear mold plate in the mold opening and closing direction, the opening end of the limiting hole is located at the first end of the rear mold plate, the, the head is movably arranged in the limiting hole and can be abutted against the end face of the guide hole connected with the limiting hole, and the distance between the head and the supporting plate in the mold opening and closing direction is larger than the height of the guide hole.

A further proposal is that the injection mold also comprises an ejector plate and a button machine component, the ejector plate can be movably positioned at one end of the supporting plate far away from the rear template along the direction of the mould opening and closing, the button machine component comprises a button machine pull rod, a button machine slide block, a pressure spring and a button machine guide block, the button machine pull rod extends along the direction of the mould opening and closing, the first end of the button machine pull rod is connected with the side surface of the ejector plate, the second end of the button machine pull rod is provided with a buckling groove near the side surface of the rear template, the first end of the button machine guide block is connected with the side surface of the supporting plate, the second end of the button machine guide block extends towards the rear template along the direction of the mould opening and closing, the button machine guide block is provided with a sixth guide groove which is arranged in a penetrating way, the second end of the button machine pull rod can be positioned in the sixth guide groove in a sliding way, the side surface of the button machine guide block near the rear template is provided, the two ends of the pressure spring are abutted between the buckling machine sliding block and the bottom surface of the accommodating groove, the buckling tongue of the buckling machine sliding block is forced by the pressure spring to extend out of the accommodating groove and be inserted into the buckling groove and the guide groove, the height of the guide groove in the mold opening and closing direction is larger than that of the buckling tongue, and the side surface of the buckling machine guide block close to the rear template can force the buckling tongue to retract into the accommodating groove.

Drawings

Fig. 1 is a structural view of a conventional lid.

Fig. 2 is a sectional view of a conventional lid.

Fig. 3 is a structural diagram of an embodiment of the injection mold of the present invention.

Fig. 4 is an exploded view of an embodiment of the injection mold of the present invention.

Fig. 5 is a sectional view of an embodiment of the injection mold of the present invention.

Fig. 6 is an exploded view of the fastener assembly of an embodiment of the injection mold of the present invention.

Fig. 7 is a cross-sectional view of the fastening assembly of the embodiment of the injection mold of the present invention.

Fig. 8 is a structural diagram of a rear mold plate in an embodiment of the injection mold of the present invention.

Fig. 9 is a first view structural diagram of a core-pulling mechanism in an embodiment of the injection mold of the present invention.

Fig. 10 is a second view structural diagram of the core-pulling mechanism in the embodiment of the injection mold of the present invention.

Fig. 11 is an exploded view of a stop assembly in an embodiment of the injection mold of the present invention.

Fig. 12 is a partially exploded view of a core-pulling mechanism according to an embodiment of the injection mold of the present invention.

Fig. 13 is a structural view of an insert holding structure in an embodiment of the injection mold of the present invention.

Fig. 14 is a first perspective sectional view of a core-pulling mechanism in an embodiment of the injection mold of the present invention.

Fig. 15 is a second perspective sectional view of the core-pulling mechanism in the embodiment of the injection mold of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 1 and 2, a side surface 11 of the prior art cap 1 is protruded with an obliquely arranged cylindrical portion 12, and a circumferential wall of the cylindrical portion 12 is provided with four catches 13, so that the obliquely arranged cylindrical portion 12 and the four catches 13 form two inverted structures in two different directions.

Referring to fig. 3 to 7, the injection mold 2 of the present embodiment includes a rear mold core 24, a rear mold plate 21, a supporting plate 22, an ejector plate 23, four equal-height screws 212, four auxiliary springs 27, a core pulling mechanism 26, and four groups of fastener assemblies 25, the rear mold core 24 is mounted on a first end surface of the rear mold plate 21, the supporting plate 22 is movably located at a second end of the rear mold plate 21 along a mold opening and closing direction of the injection mold 2, and the ejector plate 23 is movably located at one end of the supporting plate 22 away from the rear mold plate 21 along the mold opening and closing direction of the injection mold 2.

The four groups of buckling machine assemblies 25 are respectively located on two opposite sides of the injection mold 2 in a pairwise corresponding manner, each group of buckling machine assembly 25 comprises a buckling machine pull rod 251, a buckling machine sliding block 253, two pressure springs 254 and a buckling machine guide block 252, the buckling machine pull rod 251 extends in the mold opening and closing direction of the injection mold 2, a first end of the buckling machine pull rod 251 is connected with the side face of the ejector plate 23, and a buckling groove 2511 is formed in the side face, close to the rear mold plate 21, of a second end of the buckling machine pull rod 251. The first end of the button machine guide block 252 is connected to the side surface of the supporting plate 22, the second end of the button machine guide block 252 extends toward the rear mold plate 21 in the mold opening and closing direction of the injection mold 2, the button machine guide block 252 is provided with a sixth guide groove 2522 which is arranged in a penetrating manner, the second end of the button machine pull rod 251 is slidably located in the sixth guide groove 2522, and the side surface of the button machine guide block 252 close to the rear mold plate 21 is provided with a guide groove 2521. The side surface of the rear template 21 close to the button machine pull rod 251 is provided with an accommodating groove 216, the button machine sliding block 253 can be positioned in the accommodating groove 216, two ends of two compression springs 254 respectively press between the button machine sliding block 253 and the groove bottom surface of the accommodating groove 216, the two compression springs 254 simultaneously force the button tongue portion of the button machine sliding block 253 to extend out of the accommodating groove 216 and to be inserted into the buckling groove 2511 and the guide groove 2521, the height of the guide groove 2521 in the mold opening and closing direction of the injection mold 2 is greater than that of the button tongue portion, and the side surface of the button machine guide block 252 close to the rear template 21 can force the button tongue portion of the button machine sliding block 253.

The four auxiliary springs 27 of the present embodiment are uniformly distributed at the four corners of the back mold plate 21, and two ends of each auxiliary spring 27 respectively press between the back mold plate 21 and the support plate 22. In addition, four equal-height screws 212 are uniformly distributed at four corners of the rear mold plate 21, four sets of communicated limiting holes 213 and guiding holes 214 are formed in the rear mold plate 21 in the mold opening and closing direction of the injection mold 2, and one set of communicated limiting holes 213 and guiding holes 214 is matched with one equal-height screw 212. Each of the leveling screws 212 has a shaft portion 2121 and a head portion 2122 connected, and each set of the limiting holes 213 has an open end at a first end of the rear mold plate 21 and each set of the guiding holes 214 has an open end at a second end of the rear mold plate 21. The end of the rod part 2121 of each of the equal-height screws 212, which is far away from the head part 2122, passes through the group of guide holes 214 and is connected with the supporting plate 22, the head part 2122 of each of the equal-height screws 212 is movably located in the group of limiting holes 213 and can be pressed against the end surface of the guide holes 214, which is connected with the limiting holes 213, and the distance between the head part 2122 of each of the equal-height screws 212 and the supporting plate 22 in the mold opening and closing direction of the injection mold 2 is greater than the height of each group of guide holes 214.

The injection mold 2 of the embodiment further includes four first guide rods 28, four first guide sleeves 29, four second guide rods 210 and four second guide sleeves 211, the four first guide sleeves 29 are respectively embedded in the rear mold plate 21 and are uniformly distributed at four corners of the rear mold plate 21, first ends of the four first guide rods 28 are respectively connected with the supporting plate 22, and first ends of the four first guide rods 28 movably penetrate through the four first guide sleeves 29 respectively in the mold opening and closing direction of the injection mold 2. Four clearance holes 215 are formed in the first end face of the rear template 21, and the four clearance holes 215 are uniformly distributed at four corners of the rear template 21. The first ends of the four second guide rods 210 are respectively connected with the ejector plate 23, the second ends of the four second guide rods 210 sequentially and movably penetrate through the supporting plate 22 and the rear template 21 in the mold opening and closing direction of the injection mold 2, the four second guide sleeves 211 are respectively installed on the second end faces of the four second guide rods 210, and the four second guide sleeves 211 can be simultaneously and respectively inserted into the four avoiding holes 215.

Referring to fig. 8 to 15, the core pulling mechanism 26 of the present embodiment includes a core pulling rod 264, four sliding cores 263, a fixing seat 265, a core pulling sleeve 261, a holding insert 262, and a limiting assembly 266, where an axial direction of the core pulling rod 264 is inclined with respect to a mold opening and closing direction of the injection mold 2. The fixing seat 265 is installed on the supporting plate 22, the core pulling sleeve 261 is movably arranged to penetrate through the rear mold plate 21, and the core pulling rod 264 is arranged to slidably penetrate through the core pulling sleeve 261. The outer peripheral wall of the first end of the pulling rod 264 is provided with four first inclined surfaces 2642 for slidably fitting the four sliding cores 263, each first inclined surface 2642 is axially inclined with the pulling rod 264, each first inclined surface 2642 is convexly provided with a dovetail-shaped guide strip 2643 extending along the inclined direction thereof, each sliding core 263 is provided with a dovetail groove 2631, one guide strip 2643 is located in one dovetail groove 2631, and the four first inclined surfaces 2642 are uniformly distributed around the axis of the pulling rod 264 in this embodiment. The second end of the rod 264 is provided with a first slide rail 2641, the fixing base 265 is provided with a first guide slot 2651 and a second guide slot 2652, the extending directions of which are parallel to each other, the first slide rail 2641 is slidably located in the first guide slot 2651, and the extending direction of the first guide slot 2651 is perpendicular to the axial direction of the rod 264. The core pulling sleeve 261 is provided with a second sliding rail 2613 at a first end close to the second end of the core pulling rod 264, the second sliding rail 2613 is slidably located in a second guiding groove 2652, the height of the second guiding groove 2652 in the axial direction of the core pulling rod 264 is greater than the height of the second sliding rail 2613, and preferably, the height difference between the second guiding groove 2652 in the axial direction of the core pulling rod 264 and the second sliding rail 2613 is 9.0 mm. Wherein, a rear mold cavity can be formed among the rear mold core 24, the first end of the core pulling rod 264, the four sliding cores 263 and the second end of the core pulling sleeve 261.

Specifically, the four sliding cores 263 are located on a second end surface of the core pulling sleeve 261 close to the first end of the core pulling rod 264, and the holding insert 262 is sleeved on the first end of the core pulling rod 264 and located on the second end surface of the core pulling sleeve 261. The insert 262 defines four through slots 2621 therethrough, and a slide core 263 is movably disposed in one of the through slots 2621. Four third guide grooves 2622 are formed in a first end surface of the holding insert 262, one third guide groove 2622 communicates with one through groove 2621 and extends outward in the radial direction of the holding insert 262, a guide block 2632 is protruded from a side surface of each slide core 263 opposite to the dovetail groove 2631, and one guide block 2632 is movably located in one third guide groove 2622. The second end surface of the holding insert 262 is provided with four fourth guiding grooves 2623, one fourth guiding groove 2623 is communicated with one through groove 2621 in the circumferential direction of the holding insert 262, the side surface of each sliding core 263 close to the second end surface of the core pulling sleeve 261 is convexly provided with a third sliding rail 2633, and one third sliding rail 2633 is movably located in one fourth guiding groove 2623. In this embodiment, a rear mold cavity may be formed between the rear mold core 24, the first end of the plunger rod 264, the four slide cores 263, the first end of the retaining insert 262, and the second end of the core pulling sleeve 261, the core pulling sleeve 261 is composed of a first insert 2611 and a second insert 2612 connected to each other, the retaining insert 262 is located on an end surface of the first insert 2611 away from the second insert 2612, and the second slide rail 2613 is disposed at an end of the second insert 2612 away from the first insert 2611.

The limiting assembly 266 comprises a locking insert 2661, a limiting insert 2664, a driving insert 2662 and two elastic members 2663, wherein a groove 2614 is formed on the peripheral wall of the core pulling sleeve 261, and a limiting part 26641 of the limiting insert 2664 can be inserted into the groove 2614. The two resilient members 2663 simultaneously urge the stopper 26641 to move closer to the groove 2614, and the driving insert 2662 urges the stopper 26641 to move away from the groove 2614. Specifically, the second end surface of the rear mold plate 21 is provided with a mounting groove 217, the locking insert 2661 is fixedly mounted in the mounting groove 217, the locking insert 2661 is provided with a fifth guide groove 26611 extending along the moving direction of the limiting portion 26641, and one side of the limiting insert 2664 opposite to the limiting portion 26641 is movably inserted into the fifth guide groove 26611. An end surface of the locking insert 2661 is formed with an assembling through hole 26612 communicated with the fifth guide groove 26611, a fastener 2665 is installed in the assembling through hole 26612, an end surface of the limiting insert 2664 close to the assembling through hole 26612 is formed with a stopping groove 26644, the stopping groove 26644 extends in the moving direction of the limiting portion 26641, and one end of the fastener 2665 is inserted into the stopping groove 26644. The elastic member 2663 is a return spring, and two return springs are located in the mounting groove 217, and the two return springs simultaneously press against a pressed side of the limiting insert 2664 opposite to the limiting portion 26641 and force the limiting portion 26641 to move close to the groove 2614. The position-limiting insert 2664 has a fitting groove 26642 formed therethrough, and the driving insert 2662 is movably disposed through the fitting groove 26642. Specifically, the bottom surface of the mounting groove 217 is provided with a clearance groove 218, a first end of the driving insert 2662 is connected to the support plate 22, and a second end of the driving insert 2662 passes through the matching groove 26642 and can be inserted into the clearance groove 218. The driving insert 2662 is provided with a pressing portion 26621 protruding from a side surface thereof close to the return spring, and the pressing portion 26621 can press against a side surface 26643 of the engaging groove 26642 close to the return spring and force the limiting portion 26641 to move away from the groove 2614. In this embodiment, the driving insert 2662 extends in the mold opening and closing direction of the injection mold 2, the moving direction of the limiting portion 26641 is perpendicular to the mold opening and closing direction of the injection mold 2, and the groove 2614 is located on the second insert 2612.

Referring to fig. 5, 7, 14 and 15, the operation principle of the present embodiment is as follows.

When the injection mold 2 is in a mold closing state, the rear mold plate 21 and the support plate 22 are abutted and matched, the pressure spring 254 of the button machine assembly 25 forces the button tongue portion of the button machine sliding block 253 to extend out of the accommodating groove 216 and to be inserted into the buckling groove 2511 and the guide groove 2521 to be buckled and locked with the button machine pull rod 251, one end, close to the support plate 22, of the guide groove 2521 in the mold opening and closing direction of the injection mold 2 is abutted to the button tongue portion of the button machine sliding block 253, the second guide sleeve 211 is inserted into the clearance hole 215, the head 2122 of the equal-height screw 212 is far away from the end face, connected with the guide hole 214 and the limiting hole 213, the second sliding rail 2613 of the core pulling sleeve 261 is abutted to one side, close to the first guide groove 2651, of the second guide groove 2652 of the fixing seat 265, the elastic piece 2663 forces the limiting portion 26641 of the limiting insert 2664 to be inserted into the groove 2614 of the core, the four slide cores 263, the first end of the retaining insert 262 and the second end of the core barrel 261 form a rear mold cavity therebetween.

When the injection mold 2 is opened, when the supporting plate 22 moves downward under the driving of the injection machine, the restoring force of the auxiliary spring 27 assists the supporting plate 22 to move downward, the rear mold plate 21 and the ejector plate 23 remain stationary, and the buckle guide block 252 moves downward along with the driving of the supporting plate 22, and after the buckle tongue part of the buckle slider 253 is separated from the guide groove 2521, the side surface of the buckle guide block 252 close to the rear mold plate 21 is pressed against the buckle tongue part of the buckle slider 253 and forces the buckle tongue part of the buckle slider 253 to retract into the accommodating groove 216, and at this time, the buckle tongue part of the buckle slider 253 is released from locking fit with the buckle groove 2511 of the buckle pull rod 251. Meanwhile, along with the supporting plate 22 driving the fixing seat 265 and the driving insert 2662 to move downward, the core pulling rod 264 also moves downward and drives the four sliding cores 263 to retract toward the axis of the core pulling rod 264, so as to perform the first core pulling operation on the four buckles 13 of the cover body 1. The driving insert 2662 is driven by the supporting plate 22 to move downward, the driving portion 26621 of the driving insert 2662 presses against the side surface 26643, close to the elastic member 2663, of the fitting groove 26642 and forces the limiting portion 26641 to move away from the groove 2614, and before the first core-pulling operation is completed, the limiting portion 26641 is not completely separated from the groove 2614, so that the core-pulling sleeve 261 is kept still during the first core-pulling operation.

When the first core pulling operation is completed, the driving portion 26621 of the driving insert 2662 presses against the side 26643 of the matching slot 26642 close to the elastic member 2663 and forces the limiting portion 26641 to be completely separated from the groove 2614, at this time, the buckle tongue portion of the buckle slider 253 also synchronously releases the locking fit with the buckle slot 2511 of the buckle pull rod 251, the head 2122 of the equal-height screw 212 presses against the end face of the guide hole 214 connected with the limiting hole 213, and the second slide rail 2613 of the core pulling sleeve 261 presses against the side of the second guide slot 2652 of the fixing seat 265 far away from the first guide slot 2651. Then, when the rear mold plate 21 moves downward by the injection machine, the carrier plate 22 and the ejector plate 23 remain stationary, and the core pulling sleeve 261 is moved downward by the rear mold plate 21, so that the second core pulling operation is performed on the cylindrical portion 12 of the cover body 1, thereby completing the two-sided core pulling operation.

The core pulling mechanism 26 of the injection mold 2 of the present embodiment guarantees the core pulling rod 264 and the sliding core 263 to stably realize the first core pulling operation through the limiting component 266, and ensures that the core pulling sleeve 261 remains stationary in the first core pulling operation process, and the core pulling sleeve 261 cannot be driven by friction force, so that the product is prevented from being damaged by pulling. Meanwhile, the button machine assembly 25 of the injection mold 2 can ensure that the supporting plate 22 is opened first, and can ensure that the opening sequence can be ensured after the auxiliary spring 27 fails in long-term production. This embodiment injection mold 2's novel structure, the processing cost is low, and it is efficient to make a mould, and production efficiency is high, and the production precision is high, can smoothly demold effectively, and the yields of product is high.

Above embodiment is the preferred example of the utility model, and not the restriction the utility model discloses the range of implementing, the event all according to the utility model discloses the equivalent change or the decoration that structure, characteristic and principle were done of application for patent scope all should be included in the utility model discloses the patent application scope.

Claims (10)

1. Injection mold mechanism of loosing core, including loosing core pole, smooth core and fixing base, the axial of loosing core pole sets up its characterized in that with injection mold's the mould direction slope that opens and shuts:

the core pulling mechanism of the injection mold further comprises a core pulling sleeve and a limiting assembly, the core pulling rod can penetrate through the core pulling sleeve in a sliding manner, a first inclined plane for the sliding core to be matched in a sliding manner is formed in the peripheral wall of the first end of the core pulling rod, the first inclined plane and the axial direction of the core pulling rod are obliquely arranged, a dovetail-shaped guide strip extending along the oblique direction of the first inclined plane is convexly arranged on the first inclined plane, a dovetail groove is formed in the sliding core, and the guide strip is located in the dovetail groove;

a first sliding rail is arranged at the second end of the core pulling rod, a first guide groove and a second guide groove which are parallel to each other in extension direction are formed in the fixed seat, the first sliding rail can be slidably positioned in the first guide groove, and the extension direction of the first guide groove is perpendicular to the axial direction of the core pulling rod;

a second sliding rail is arranged at the first end, close to the second end of the core pulling rod, of the core pulling sleeve, the second sliding rail is slidably positioned in the second guide groove, and the axial height of the second guide groove in the core pulling rod is greater than that of the second sliding rail;

the limiting assembly comprises a limiting insert, a driving insert and an elastic piece, a groove is formed in the outer peripheral wall of the core pulling sleeve, and a limiting part of the limiting insert can be inserted into the groove;

the elastic piece forces the limiting part to move close to the groove, and the driving insert can force the limiting part to move away from the groove.

2. The injection mold core-pulling mechanism according to claim 1, characterized in that:

the core pulling mechanism of the injection mold further comprises a holding insert, the sliding core is positioned on a second end face, close to the first end of the core pulling rod, of the core pulling sleeve, and the holding insert is sleeved on the first end of the core pulling rod and positioned on the second end face of the core pulling sleeve;

the holding insert is provided with a through groove which penetrates through the holding insert, and the sliding core is movably located in the through groove.

3. The injection mold core-pulling mechanism according to claim 2, characterized in that:

the first end face of the holding insert is provided with a third guide groove, the third guide groove is communicated with the through groove and extends outwards in the radial direction of the holding insert, a guide sliding block is convexly arranged on the side face, opposite to the dovetail groove, of the sliding core, and the guide sliding block is movably located in the third guide groove.

4. The injection mold core-pulling mechanism according to claim 3, characterized in that:

the second end surface of the holding insert is provided with a fourth guide groove, the fourth guide groove is communicated with the through groove in the circumferential direction of the holding insert, a third slide rail is convexly arranged on the side surface of the sliding core close to the second end surface of the core drawing sleeve, and the third slide rail is movably positioned in the fourth guide groove.

5. An injection mold core pulling mechanism according to any one of claims 1 to 4, characterized in that:

the elastic part is a return spring, the limiting insert is provided with a matching groove which penetrates through the limiting insert, and the driving insert movably penetrates through the matching groove;

the reset spring is pressed against the pressed side face of the limiting insert opposite to the limiting part and forces the limiting part to move close to the groove;

the side surface of the driving insert, which is close to the reset spring, is convexly provided with a driving portion, and the driving portion can be pressed on the side surface of the matching groove, which is close to the reset spring, and force the limiting portion to move away from the groove.

6. The injection mold core-pulling mechanism according to claim 5, characterized in that:

the limiting assembly further comprises a locking insert, the locking insert is provided with a fifth guide groove extending along the moving direction of the limiting portion, and one side, opposite to the limiting portion, of the limiting insert is movably inserted into the fifth guide groove.

7. The injection mold core-pulling mechanism according to claim 6, characterized in that:

an assembly through hole communicated with the fifth guide groove is formed in one end face of the locking insert, and a fastening piece is installed in the assembly through hole;

the end face, close to the assembling through hole, of the limiting insert is provided with a stopping groove, the stopping groove extends along the moving direction of the limiting portion, and one end of the fastener is inserted into the stopping groove.

8. Injection mold, including the mechanism of loosing core, its characterized in that:

the core-pulling mechanism is an injection mold core-pulling mechanism as set forth in any one of claims 1 to 7 above.

9. An injection mold according to claim 8, wherein:

the injection mold further comprises a rear mold core, a rear mold plate, a supporting plate, a contour screw and an auxiliary spring, wherein the rear mold core is installed on a first end face of the rear mold plate, the supporting plate is movably located at a second end of the rear mold plate along the mold opening and closing direction, and two ends of the auxiliary spring are respectively abutted between the rear mold plate and the supporting plate;

the fixed seat is installed on the supporting plate, the core pulling sleeve movably penetrates through the rear template, the driving insert is connected with the supporting plate, and a rear mold cavity can be formed among the rear mold core, the first end of the core pulling rod, the sliding core and the second end of the core pulling sleeve;

the equal-height screws are provided with rod parts and head parts which are connected, the rear template is provided with a limiting hole and a guide hole which are communicated in the die opening and closing direction, the opening end of the limiting hole is positioned at the first end of the rear template, and the opening end of the guide hole is positioned at the second end of the rear template;

one end, far away from the head, of the rod part penetrates through the guide hole and is connected with the supporting plate, the head is movably located in the limiting hole and can be pressed on the end face, connected with the limiting hole, of the guide hole in a propping mode, and the distance between the head and the supporting plate in the mold opening and closing direction is larger than the height of the guide hole.

10. An injection mold according to claim 9, wherein:

the injection mold further comprises an ejector plate and a buckling machine assembly, wherein the ejector plate can be movably located at one end, far away from the rear template, of the supporting plate along the mold opening and closing direction;

the buckling machine assembly comprises a buckling machine pull rod, a buckling machine sliding block, a pressure spring and a buckling machine guide block, the buckling machine pull rod extends in the mold opening and closing direction, the first end of the buckling machine pull rod is connected with the side face of the ejector plate, and the second end of the buckling machine pull rod, close to the side face of the rear template, is provided with a buckling groove;

the first end of the button machine guide block is connected with the side face of the supporting plate, the second end of the button machine guide block extends towards the rear template in the die opening and closing direction, a sixth guide groove which penetrates through the button machine guide block is formed in the button machine guide block, the second end of the button machine pull rod can be located in the sixth guide groove in a sliding mode, and a guide groove is formed in the side face, close to the rear template, of the button machine guide block;

the side surface of the rear template, which is close to the button machine pull rod, is provided with a containing groove, the button machine slide block can be positioned in the containing groove, two ends of a pressure spring are pressed between the button machine slide block and the bottom surface of the containing groove in a propping manner, the pressure spring forces the button tongue part of the button machine slide block to extend out of the containing groove and be inserted into the buckling groove and the guide groove, the height of the guide groove in the mold opening and closing direction is greater than that of the button tongue part, and the side surface of the button machine guide block, which is close to the rear template, can force the button tongue part to retract into the containing groove.

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