CN216804287U

CN216804287U - Rotary ejection mechanism of injection mold

Info

Publication number: CN216804287U
Application number: CN202122778480.2U
Authority: CN
Inventors: 张琳; 张先瑞; 刘居康; 王立芳; 曲小源
Original assignee: Qingdao Technical College
Current assignee: Qingdao Technical College
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-06-24
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a rotary ejection mechanism of an injection mold, which comprises an ejector block head, an ejection round rod, a rotary control guide rail and a fixed seat, wherein the top of the ejection round rod is fixedly connected with the ejector block head, the bottom of the ejection round rod is rotatably connected with the fixed seat, the rotary control guide rail is sleeved in the middle of the ejection round rod in a rotating mode, the side wall of the rotary control guide rail is provided with a chute, the chute is of a three-section structure, the middle of the ejection round rod is an inclined section, two sections on two sides of the ejection round rod are vertical sections, the side wall of the ejection round rod is fixedly connected with a first bearing through a first screw, and the first bearing is located in the chute. According to the utility model, the injection molding product is subjected to back-off and mold stripping by means of ejection and rotation of the ejection round rod, the oblique movement mode of the traditional oblique ejection mechanism is changed, and the ejection round rod is not limited by the length and the section size. The whole rotary ejection mechanism does not need external driving force, realizes ejection and rotation actions by means of reciprocating motion of the ejector plate and the rotary control guide rail, has a simple, flexible and reliable structure, and is suitable for deep cavity injection molds.

Description

Rotary ejection mechanism of injection mold

Technical Field

The utility model relates to the technical field of molds, in particular to a rotary ejection mechanism of an injection mold.

Background

In the field of injection molds, an inclined ejection mechanism is usually adopted to realize smooth demolding of injection molding products by taking off an inverted buckle inside, the adopted inclined ejection mechanism is shown in figures 1 and 2 and consists of an inclined ejector rod 1 ', an inclined ejector seat 2' and a guide seat 3 ', a certain inclined included angle alpha is formed between the inclined ejector rod 1' and the ejection direction, and the inclined ejector rod 1 'is driven by a mold ejector plate 4' to generate two-direction movement, namely movement parallel to the ejection direction and movement separated from the inverted buckle direction. Although the inclined ejection mechanism can realize the ejection of most injection products by taking off and reversing, the following two conditions are limited in use:

1) the space is insufficient; because the pitched roof needs a certain avoidance space when retreating, if the pitched roof interferes with a formed product or other mechanisms in the retreating direction of the pitched roof, the pitched roof mechanism cannot be used;

2) the mold core of the rear mold of the mold is higher, so that the strength of the inclined ejector rod is influenced; the length of an inclined ejector rod 1 'of the inclined ejector mechanism is generally controlled within 450mm, the section size is larger than 12 x 12mm, alpha is smaller than 10 degrees, and the stable production of the inclined ejector rod 1' can be ensured without bending continuously; in the deep cavity injection mold, the mold core of the mold is high, the length of the inclined ejector rod 1 'needs to exceed 600mm, the section size is smaller than 10 x 10mm, alpha is larger than 10 degrees, and the inclined ejector rod 1' is very easy to bend and clamp in the moving process, so that the use stability of the mold cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides a rotary ejection mechanism of an injection mold.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the utility model provides an injection mold rotary ejection mechanism which characterized in that: including top piece head, ejecting round bar, rotation control guide rail and fixing base, ejecting round bar top fixed connection top piece head, bottom rotate and connect the fixing base, rotate in the middle of the ejecting round bar and cup joint the rotation control guide rail, rotation control guide rail lateral wall is equipped with the spout, the spout is the syllogic structure, and the centre is the slope section, and two sections of both sides are vertical sections, ejecting round bar lateral wall is through the first bearing of first screw fixed connection, first bearing is located the spout.

Further, the method comprises the following steps of; the ejection block head is of an inverted cone structure, the lower end of the ejection block head is clamped with the top of the ejection round rod, the ejection block head is fixedly connected with the ejection round rod through a second screw, and a plurality of bosses are uniformly distributed on the side wall of the top of the ejection block head and used for reversely buckling the clamping jaws of the formed products.

Further, the method comprises the following steps of; the ejector block head is provided with a sealing screw above the second screw, the side wall of the top of the ejection round rod is symmetrically provided with clamping grooves, and the center of the lower end of the ejector block head is provided with a groove clamped with the top of the ejection round rod.

Further, the method comprises the following steps of; the side wall of the front and the back of the first bearing is respectively provided with a front flat gasket and a back flat gasket, the side wall of the ejection round rod is connected with the first bearing and is provided with a square groove, and the back flat gasket is positioned in the square groove.

Further, the method comprises the following steps of; the rotation control guide rail is formed by splicing two semi-cylinders, and the sliding groove is formed in the splicing position of one side of the two semi-cylinders.

Further, the method comprises the following steps of; and the outer wall of the lower end of the rotation control guide rail is provided with a convex guide rail fixing seat.

Further, the method comprises the following steps of; the fixed seat comprises a bearing seat, a second bearing, a connecting shaft, a third bearing and a cover plate, wherein a trapezoidal slotted hole is formed in the bearing seat, the connecting shaft is arranged in the trapezoidal slotted hole, and the top of the connecting shaft is clamped with the bottom of the ejection round rod; the connecting shaft is characterized in that a second bearing and a third bearing are fixedly sleeved at two ends of the connecting shaft respectively, an outer ring of the second bearing and an outer ring of the third bearing are fixedly connected with the wall of the trapezoidal groove hole, a cover plate is arranged at the lower end of the trapezoidal groove hole, a plug-in connecting screw is rotated at the center of the cover plate, and the connecting screw penetrates through the connecting shaft to be connected with the bottom of the ejection round rod.

Further, the method comprises the following steps of; the fixing seat further comprises a bearing support sleeve, the connecting shaft is sleeved with the bearing support sleeve, and the upper end and the lower end of the bearing support sleeve support a second bearing outer ring and a third bearing outer ring respectively.

Further, the method comprises the following steps of; the bottom of the ejection round rod is provided with a polygonal bump, and the top of the connecting shaft is provided with a polygonal groove clamped with the polygonal bump.

Further, the method comprises the following steps of; and a gasket is arranged between the connecting screw and the cover plate.

The utility model has the beneficial effects that: the utility model solves the problem of poor strength of the inclined ejector rod of the deep-cavity inclined ejector mechanism. According to the utility model, the injection molding product is subjected to back-off and mold stripping by the ejection and rotation of the ejection round rod, the oblique movement mode of the traditional oblique ejection mechanism is changed, and the ejection round rod is not limited by the length and the section size. The whole rotary ejection mechanism does not need external driving force, realizes ejection and rotation actions by means of reciprocating motion of the ejector plate and the rotary control guide rail, has a simple, flexible and reliable structure, and is suitable for deep cavity injection molds.

The utility model has simple structural components, is easy to manufacture and assemble, does not need special maintenance, obviously reduces the time of mould maintenance and saves the maintenance cost.

Drawings

FIG. 1 is a schematic view of a prior art pitched roof mechanism;

FIG. 2 is a schematic view of a prior art pitched roof mechanism;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a front view of the present invention;

FIG. 5 is a schematic illustration of a split structure of the present invention;

FIG. 6 is a left side elevation view of the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 5;

fig. 8 is an enlarged view of a portion B in fig. 6.

In the figure: 1. a top block head; 2. ejecting the round rod; 3. rotating the control guide rail; 4. a fixed seat; 5. a first screw; 6. a second screw; 7. a boss; 8. a seal screw; 9. a chute; 9-1, an upper vertical section; 9-2, an inclined section; 9-3, a lower vertical section; 10. a first bearing; 11. a front flat washer; 12. a rear flat washer; 13. a square groove; 14. a guide rail fixing seat; 15. a bearing seat; 16. a second bearing; 17. a connecting shaft; 18. a third bearing; 19. a bearing support sleeve; 20. a cover plate; 21. a quadrangular bump; 22. a connecting screw; 23. a gasket; 24. a clamping groove.

Detailed Description

Example 1:

as shown in fig. 3 to 8, the injection mold rotary ejection mechanism comprises a top block head 1, an ejection round rod 2, a rotary control guide rail 3 and a fixed seat 4, wherein the top of the ejection round rod 2 is fixedly connected with the top block head 1, the bottom of the ejection round rod is rotatably connected with the fixed seat 4, and the rotary control guide rail 3 is rotatably sleeved in the middle of the ejection round rod 2. The ejection block comprises an ejection block head 1, an ejection round rod 2, a clamping groove 24 and a groove, wherein the lower end of the ejection block head 1 is clamped with the top of the ejection round rod 2, the side wall of the top of the ejection round rod 2 is symmetrically provided with the clamping groove 24, the center of the lower end of the ejection block head 1 is provided with the groove clamped with the top of the ejection round rod 2, the ejection block head 1 is fixedly connected with the ejection round rod 2 through a second screw 6, the side wall of the top of the ejection block head 1 is uniformly provided with three bosses 7, the ejection block head 1 is provided with a sealing screw 8 above the second screw 6, and the sealing screw 8 can prevent molten plastic from entering a screw hole.

The side wall of the rotation control guide rail 3 is provided with a chute 9, the chute 9 is of a three-section structure, the upper section is an upper vertical section 9-1, the middle section is an inclined section 9-2, the lower section is a lower vertical section 9-3, the inclination angle beta of the inclined section 9-2 is 25 degrees, the side wall of the ejection round rod 2 is fixedly connected with a first bearing 10 through a first screw 5, the first screw 5 is fixedly connected with the inner ring of the first bearing 10 and the ejection round rod 2, the first bearing 10 is positioned in the chute 9, and the width of the chute 9 is slightly larger than the diameter of the outer ring of the first bearing 10; the outer wall of the lower end of the rotation control guide rail 3 is provided with a convex guide rail fixing seat 14.

In this embodiment, preferably, the front and rear side walls of the first bearing 10 are respectively provided with a front flat washer 11 and a rear flat washer 12, a square groove 13 is provided at the position where the side wall of the round ejector rod 2 is connected to the first bearing 10, and the rear flat washer 12 is located in the square groove 13.

Preferably, the rotating control guide rail 3 is formed by splicing two semi-cylinders, and the sliding groove 9 is formed at the splicing position of one side of the two semi-cylinders.

In the preferred embodiment, the fixed seat 4 includes a bearing seat 15, a second bearing 16, a connecting shaft 17, a third bearing 18, a bearing support sleeve 19 and a cover plate 20, a trapezoidal groove hole is formed in the bearing seat 15, the connecting shaft 17 is arranged in the trapezoidal groove hole, the top of the connecting shaft 17 extends out of the bearing seat 15 and is clamped with the bottom of the ejection round rod 2, a quadrilateral convex block 21 is arranged at the bottom of the ejection round rod 2, and a quadrilateral groove clamped with the quadrilateral convex block 21 is arranged at the top of the connecting shaft 17; the diameter is greater than both ends diameter in the middle of the connecting axle 17, connecting axle 17 both ends are fixed respectively and cup joint second bearing 16 and third bearing 18, second bearing 16 outer lane and third bearing 18 outer lane all with dovetail groove pore wall fixed connection, connecting axle 17 overcoat connects bearing support cover 19, bearing support cover 19 upper and lower both ends support second bearing 16 outer lane and third bearing 18 outer lane respectively.

The lower end of the trapezoid slotted hole is provided with a cover plate 20, the cover plate 20 is fixedly connected with the bearing seat 15 through a bolt, the center of the cover plate 20 rotates to be inserted with a connecting screw 22, the connecting screw 22 penetrates through the connecting shaft 17 to be connected with the bottom of the ejection round rod 2, and the connecting screw 22 is in threaded connection with the connecting shaft 17 and the ejection round rod 2.

Preferably, a gasket 23 is disposed between the connection screw 22 and the cover plate 20.

The working principle is as follows: the whole of top piece head 1 is inlayed in back mould mold insert, and three boss 7 of its lateral wall is used for the shaping goods jack catch back-off, and on rotary control guide rail 3 was fixed in mould back template through guide rail fixing base 14, fixing base 4 was fixed on the mould thimble board, and reciprocating motion through the thimble board drove 2 reciprocating motion of ejecting round bar, and 2 reciprocating motion in-process primary shaft bearings 10 of ejecting round bar move along spout 9, and spout 9 is the syllogic structure: an upper vertical section 9-1, an inclined section 9-2 and a lower vertical section 9-3; when the first bearing 10 runs upwards along the lower vertical section 9-3, the three bosses 7 are completely separated from the rear die insert to give room for the next rotation action; when the molded product is moved to the inclined section 9-2, the ejection round rod 2 is driven to rotate, the ejection block head 1 is completely separated from the product back-off after rotating, and the inclination angle beta of the inclined section 9-2 is determined according to the back-off position and size of the molded product; and continuously moving upwards along the upper vertical section 9-1, ejecting the product by the ejector block head 1 to completely separate the product from the rear mold core, and smoothly taking the product.

The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the utility model as set forth in the appended claims.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientations and positional relationships shown in the drawings only for the convenience of describing the present invention and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Claims

1. The utility model provides an injection mold rotary ejection mechanism which characterized in that: including ejecting block head, ejecting round bar, rotation control guide rail and fixing base, ejecting round bar top fixed connection ejecting block head, bottom rotate and connect the fixing base, rotate in the middle of the ejecting round bar and cup joint the rotation control guide rail, the rotation control guide rail lateral wall is equipped with the spout, the spout is syllogic structure, and the centre is the slope section, and two sections of both sides are vertical sections, ejecting round bar lateral wall is through the first bearing of first screw fixed connection, first bearing is located the spout.

2. The injection mold rotary ejection mechanism of claim 1, wherein: the ejecting block head is of an inverted cone structure, the lower end of the ejecting block head is clamped with the top of the ejection round rod, the ejecting block head is fixedly connected with the ejection round rod through a second screw, and a plurality of bosses are uniformly distributed on the side wall of the top of the ejecting block head.

3. The injection mold rotary ejection mechanism of claim 2, wherein: the ejector block head is provided with a sealing screw above the second screw, the side wall of the top of the ejection round rod is symmetrically provided with clamping grooves, and the center of the lower end of the ejector block head is provided with a groove clamped with the top of the ejection round rod.

4. The injection mold rotary ejection mechanism of claim 1, wherein: the side wall of the front and the back of the first bearing is respectively provided with a front flat gasket and a back flat gasket, the side wall of the ejection round rod is connected with the first bearing and is provided with a square groove, and the back flat gasket is positioned in the square groove.

5. The injection mold rotary ejection mechanism of claim 1, wherein: the rotation control guide rail is formed by splicing two semi-cylinders, and the sliding groove is formed in the splicing position of one side of the two semi-cylinders.

6. The injection mold rotary ejection mechanism of claim 1, wherein: and the outer wall of the lower end of the rotation control guide rail is provided with a convex guide rail fixing seat.

7. The injection mold rotary ejection mechanism of claim 1, wherein: the fixed seat comprises a bearing seat, a second bearing, a connecting shaft, a third bearing and a cover plate, wherein a trapezoidal slotted hole is formed in the bearing seat, the connecting shaft is arranged in the trapezoidal slotted hole, and the top of the connecting shaft is clamped with the bottom of the ejection round rod; the two ends of the connecting shaft are respectively fixedly sleeved with a second bearing and a third bearing, an outer ring of the second bearing and an outer ring of the third bearing are fixedly connected with the wall of the trapezoidal groove hole, a cover plate is arranged at the lower end of the trapezoidal groove hole, the center of the cover plate rotates to be connected with a plug-in connection screw, and the connection screw penetrates through the connecting shaft to be connected with the bottom of the ejection round rod.

8. The injection mold rotary ejection mechanism of claim 7, wherein: the fixing seat further comprises a bearing support sleeve, the connecting shaft outer sleeve is connected with the bearing support sleeve, and the upper end and the lower end of the bearing support sleeve support a second bearing outer ring and a third bearing outer ring respectively.

9. The injection mold rotary ejection mechanism of claim 7, wherein: the bottom of the ejection round rod is provided with a polygonal convex block, and the top of the connecting shaft is provided with a polygonal groove clamped with the polygonal convex block.

10. The injection mold rotary ejection mechanism of claim 7, wherein: and a gasket is arranged between the connecting screw and the cover plate.