CN218803794U

CN218803794U - Mold ejection mechanism and plastic mold

Info

Publication number: CN218803794U
Application number: CN202222864725.8U
Authority: CN
Inventors: 王纯东; 余闯; 陈旭峰; 陈强; 郑琴
Original assignee: Qingling Motors Group Co Ltd; Chongqing Qingling Plastic Co Ltd
Current assignee: Qingling Motors Group Co Ltd; Chongqing Qingling Plastic Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-07
Anticipated expiration: 2032-10-28

Abstract

The utility model provides a mould ejection mechanism and plastic mold belongs to mould technical field. The utility model comprises an ejector plate, an ejector fixing plate and a rear mould, wherein the ejector plate is connected with the ejector fixing plate, and the rear mould is provided with a guide channel vertical to the ejector fixing plate; the ejector pin fixing plate is characterized by further comprising a fixed mounting assembly and a guide ejection assembly, wherein the fixed mounting assembly is arranged on the ejector pin fixing plate and used for driving the guide ejection assembly to perform ejection and/or retraction movement; the guide ejection assembly comprises an ejection rod and a guide block, the tail end of the ejection rod is connected with the fixed mounting assembly, and the ejection rod is used for changing a straight ejection mode into an inclined ejection mode to perform demolding under the guide effect of the guide channel and the guide block. The utility model provides a product quality has been guaranteed to the problem of the adjacent two back-off drawing of patterns of product, has improved production efficiency, simple structure, and the commonality is strong, but the multiple product of adaptation is used, and is favorable to arranging of mould cooling water route to improve product cooling effect.

Description

Mold ejection mechanism and plastic mold

Technical Field

The utility model relates to the technical field of mold, especially, relate to a mould ejection mechanism and plastic mold.

Background

In the design of a plastic mold, when a product structure has structures such as a boss, a hole site, a groove and the like, if the structure demolding direction is inconsistent with the normal product demolding direction, an inverted buckle is formed. At this time, a mechanism (i.e., a lifter mechanism) needs to be added to the mold to release the reverse buckle in other directions.

In the prior art, an inclined top hole is generally processed on a die, an inclined top rod is inserted into the inclined top hole, and one end of the inclined top rod, which is close to a product, is connected with an inclined top block. When the ejector rod of the injection molding machine pushes the mold ejector plate, the oblique ejector pin is obliquely processed, the oblique ejector pin moves along the direction of the oblique ejector pin when moving upwards, and the bottom of the oblique ejector pin moves towards the horizontal direction, so that the product buckling position is separated from the reverse buckle.

When the product back structure has two back-off that the adjacent distance is close, and need be towards not equidirectional ejecting, for avoiding oblique ejector pin and oblique spout to interfere, need do the oblique kicking block big to dodge oblique ejector pin towards both sides separately. However, after the inclined ejecting block is enlarged, the inclined ejecting block is easy to interfere with other structures of a product, the die sinking of the product is influenced, and the cooling water path position of the inclined ejecting area is not easy to arrange after the overall dimension of the inclined ejecting block is enlarged, so that the cooling effect of the movable die at the position is poor. Secondly, the processing difficulty of the inclined top hole of the movable mould is higher than that of the straight top hole.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a mould ejection mechanism and plastic mold for product back structure has the nearly back-off of two adjacent distances among the solution prior art, and when needing to go to equidirectional ejecting, the problem that the piece does not have enough spatial arrangement to one side.

To achieve the above and other related objects, the present invention provides a mold ejection mechanism, which is specifically configured as follows: the ejector pin plate is connected with the ejector pin fixing plate, and the rear die is provided with a guide channel vertical to the ejector pin fixing plate; the ejection mechanism further comprises a fixed mounting assembly and a guide ejection assembly, wherein the fixed mounting assembly is arranged on the thimble fixing plate and is used for driving the guide ejection assembly to perform ejection and/or retraction movement; the guide ejection assembly comprises an ejection rod and a guide block, the tail end of the ejection rod is connected with the fixed mounting assembly, and the ejection rod is used for demoulding a product from a straight top to an inclined top under the guide effect of the guide channel and the guide block.

Optionally, the guide block is embedded in the rear mold and provided with a guide hole, and the ejector rod passes through the guide hole and is inserted into the guide channel.

Optionally, a first guide inclined plane is arranged on the hole wall of the guide hole, and a second guide inclined plane matched with the first guide inclined plane is arranged on one side, facing the first guide inclined plane, of the ejection rod.

Optionally, one side of the ejection rod, which deviates from the first guide inclined plane, is provided with a first chamfer portion, and when the first guide inclined plane is in fit contact with the second guide inclined plane, the first chamfer portion penetrates out of the guide channel.

Optionally, the ejector rod is provided with two.

Optionally, the two ejection rods are symmetrically arranged, and the two ejection rods are in a relatively expanded state when obliquely ejecting the product and in a relatively contracted state when retracting.

Optionally, the fixed mounting assembly comprises a mounting plate, the mounting plate is embedded on the ejector fixing plate, and a pressing plate is arranged between the mounting plate and the ejector plate.

Optionally, the ejection rod is connected with the mounting plate through a rotation pin, and the ejection rod can rotate around the axis of the rotation pin.

Optionally, one end of the ejector rod connected with the mounting plate is provided with a second chamfer part.

The utility model also provides a plastic mold, include as above arbitrary the mould ejection mechanism.

As above, the utility model discloses a mould ejection mechanism and plastic mold has following beneficial effect:

the end and the fixed mounting subassembly of ejector pin are connected, and the fixed mounting subassembly drive ejector pin is ejecting and/or the motion of backing back, and the ejector pin becomes to push back to one side by straight the product and carries out the drawing of patterns under the guide effect of direction passageway and guide block, has solved the problem of the adjacent two back-off drawing of patterns of product, has guaranteed product quality, has improved production efficiency. The utility model discloses simple structure, the commonality is strong, but multiple product of adaptation is used, and the ejector pin is compared in the oblique kicking block overall dimension that increases little, can not take place to interfere with other structures, is favorable to arranging in mould cooling water route, improves product cooling effect.

Drawings

Fig. 1 is a schematic structural view of a mold ejection mechanism according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the ejector rod in fig. 1 according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the guide block in fig. 1 according to an embodiment of the present invention;

FIG. 4 is a top view of the mounting plate of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 5 is a side view of the mounting plate of FIG. 1 in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the pressing plate in fig. 1 according to an embodiment of the present invention.

Description of reference numerals

1-ejecting a rod; 11-a second guiding ramp; 12-a first chamfer; 13-a second chamfer;

2-a guide block; 21-a pilot hole; 22-a first guiding ramp;

3-a rotation pin;

4-mounting a plate; 41-a first abdicating groove; 42-U-shaped through holes;

5, pressing a plate; 51-a second yielding slot;

6-ejector pin plate;

7-a thimble fixing plate;

8-back mould;

9-front mould;

10-products.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Please refer to fig. 1 to 6. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the shape, quantity and proportion of the components in actual implementation can be changed as desired by the ejection mechanism of the plastic mold and the plastic mold thereof, and the layout of the components can be more complicated. The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the essential significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed by the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the modifications may be changed or adjusted without substantial technical changes.

As shown in fig. 1, some embodiments of the present application provide a mold ejection mechanism including an ejector plate 6, an ejector fixing plate 7, and a rear mold 8. The thimble plate 6 and the thimble fixing plate 7 are detachably connected, such as screwed connection or a positioning pin and screw combination connection. The rear die 8 is provided with a guide channel perpendicular to the ejector pin fixing plate 7, so that the problem of high difficulty in machining an inclined ejector pin hole is solved, and the machining cost is reduced.

The ejection mechanism further comprises a fixed mounting assembly and a guide ejection assembly, wherein the fixed mounting assembly is arranged on the ejector pin fixing plate 7 and is used for driving the guide ejection assembly to perform ejection and/or retraction movement. The guide ejection assembly comprises an ejection rod 1 and a guide block 2, the tail end of the ejection rod 1 is movably connected with the fixed mounting assembly, the ejection rod 1 can rotate around the tail end of the ejection rod, and the ejection rod 1 is changed from a straight ejection to an inclined ejection for demolding under the guide effect of the guide channel and the guide block 2. The problem of product 10 adjacent two back-off drawing of patterns has been solved to such setting, has guaranteed product quality, has improved production efficiency.

In some embodiments, the guide block 2 is embedded in the rear mold 8, and the guide block 2 is provided with a guide hole 21, and the ejector rod 1 passes through the guide hole 21 and is inserted into a guide channel of the rear mold 8, so that the guide hole 2 and the guide channel guide a movement trajectory of the ejector rod 1.

It should be noted that only one ejector rod 1 is inserted into each guide channel of the rear mold 8, which is convenient for the guide channel to better guide the ejector rod 1, and the movement track of the ejector rod 1 is not easy to deviate. In other embodiments, more than two ejector rods 1, e.g., 2, 3, 4, etc., may be inserted into each guide channel of the mold body back mold 8.

In some embodiments, the guide block 2 and the rear mold 8 are connected by screws. In other embodiments, the guide block 2 and the rear mold 8 are connected by a combination of a positioning pin and a screw, and may also be connected by welding or the like.

In some embodiments, the side of the hole wall of the guide hole 21 is provided with a first guide slope 22, and the side of the ejector rod 1 facing the first guide slope 22 is provided with a second guide slope 11 matching the first guide slope. Through the cooperation of the first guide inclined plane 22 and the second guide inclined plane 11, the ejector rod 1 is changed from the vertical ejector product 10 to the inclined ejector product 10, so that the buckling position of the ejector rod 1 is separated from the inverted buckle of the product 10, and the product 10 is demoulded.

The slope angle of the first guide slope 22 and the second guide slope 11 determines the slope angle of the ejector pin 1 when it is obliquely pushed. The tilt angle is set according to the size of the back-off of the product 10, and different products 10 are set at different tilt angles.

In some embodiments, the side of the ejector pin 1 facing away from the first guide ramp 22 is provided with a first chamfer 12, and the dimension of the first chamfer 12 perpendicular to the length direction of the ejector pin 1 is greater than the dimension of the second guide ramp 22 perpendicular to the length direction of the ejector pin 1. This arrangement ensures that when the first guiding ramp 22 is engaged with the second guiding ramp 11, the ejector rod 1 has an inclined space in the guiding channel, and the ejector rod 1 can successfully push the product 10 obliquely.

The difference between the dimension of the first chamfered portion 12 perpendicular to the longitudinal direction of the knock-out pin 1 and the dimension of the second guide slope 22 perpendicular to the longitudinal direction of the knock-out pin 1 indirectly determines the inclination angle of the knock-out pin 1, and the setting of the difference is different according to different products 10, and the magnitude of the difference varies according to the products 10.

In some embodiments, the first chamfered portion 12 has already passed out of the guide passage when the second guide slope 11 comes into fitting contact with the first guide slope 22. The arrangement ensures that the ejector rod 1 does not interfere with the guide channel in the process of changing from a vertical ejection product into an inclined ejection product, so that the ejector rod 1 is not smooth in operation, the product is failed in demolding, even the product is damaged, the production yield of the product is reduced, and the production cost of the product is improved.

In some embodiments, the ejection bar 1 is provided with two, respectively two, catch positions for the product 10. Two guide holes 21 are needed to be arranged corresponding to the guide block 2, and two guide channels are needed to be arranged corresponding to the rear die 8. The first guiding inclined planes 22 of the two guiding holes 21 may be arranged on the same side or different sides. The position where the first guide slope 22 is provided determines the direction in which the ejector rod 1 is tilted when obliquely pushed.

It should be noted that, when the ejection directions of the adjacent buckling positions of the product 10 are different, the number of the arranged ejection rods 1 is determined by the number of the inversed buckles of the product 10, and the number of the inversed buckles of the product 10 is consistent with the number of the arranged ejection rods 1.

In other embodiments, when the ejection directions of the adjacent fastening positions of the product 10 are the same, the number of the ejection rods 1 may not be the same as the number of the fastening positions of the product, such as the same ejection rod 1 used for the adjacent fastening positions.

In some embodiments, the two ejector rods 1 are symmetrically arranged. When the two ejection rods 1 start to eject the product 10 obliquely, the two ejection rods 1 are in a relatively unfolded state; after the product 10 is demoulded, the two ejector rods 1 retract, and at the moment, the two ejector rods 1 are in a relatively contracted state; when the two knock-out levers 1 return to the initial state, the two knock-out levers 1 are parallel to each other.

The outer shape of the surface of the two ejector pins 1 that contacts the product 10 is determined by the outer shape of the product 10.

In some embodiments, the fixed mounting assembly comprises a mounting plate 4, the mounting plate 4 is embedded on the ejector fixing plate 7, and a pressing plate 5 is arranged between the mounting plate 4 and the ejector plate 6. The mounting plate 4 and the pressing plate 5 are clamped and fixed by an ejector pin plate 6 and an ejector pin fixing plate 7. In other embodiments, the mounting plate 4 and the pressing plate 5 are fixed to the ejector plate 6 or the ejector fixing plate 7 by screws, and may be connected by a positioning pin, a combination of a positioning pin and a screw, and welding.

In some embodiments, the ejector rod 1 is connected to the mounting plate 4 by a rotation pin 3, and the ejector rod 1 can rotate around the axis of the rotation pin 3, so that the ejector rod 1 can be changed from a straight ejector product 10 to an inclined ejector product 10. Wherein, the ejector rod 1 is in interference fit with the rotating pin 3.

Fig. 3 is a schematic block diagram of a top view of a mounting plate 4 shown according to some embodiments of the present application, and fig. 4 is a schematic block diagram of a side view of the mounting plate 4 shown according to some embodiments of the present application. As shown in fig. 3 and 4, in some embodiments, the middle of the upper plane of the mounting block 4 is provided with a first avoiding groove 41 penetrating through the mounting block 4, the side surface perpendicular to the upper plane of the mounting block 4 is provided with a U-shaped through hole 42, and the U-shaped opening of the U-shaped through hole 42 is located on the lower plane of the mounting block 4. Ejector rod 1 inserts the first inslot that gives way, and in the rotating pin 4 inserted U-shaped through-hole 42, rotating pin 4 and U-shaped through-hole 42 clearance fit for ejector rod 1 is connected with installation piece 4 and ejector rod 1 can revolute the axis rotation of rotating pin 4.

FIG. 5 is a schematic block diagram of a platen 5 shown according to some embodiments of the present application. As shown in fig. 5, in some embodiments, a second avoiding groove 51 penetrating through the pressing plate 5 is disposed in the middle of the upper plane of the pressing plate 5, and the second avoiding groove 51 is matched with the first avoiding groove 41 and has the same size. The pressing plate 5 is attached to the lower plane of the mounting block 4, thereby functioning to prevent the rotation pin 4 from slipping out of the U-shaped through hole 42.

In some embodiments, the end of the ejector rod 1 connected to the mounting plate 4 is provided with a second chamfer 13, and the second chamfers 13 are respectively arranged on the edges of the ejector rod 1 in two directions rotating around the axis of the rotating pin 3, so that the ejector rod 1 is prevented from interfering with the ejector plate 6 during rotation, and the normal operation of the ejector mechanism is ensured. Under the condition that the two ejection rods 1 are arranged, the second chamfer part 13 can also prevent the two ejection rods 1 from interfering when obliquely ejecting the product 10 and retracting, and the normal operation of the ejection mechanism is ensured.

In some embodiments, the second chamfer 13 may be a right-angle chamfer or a rounded chamfer, which can satisfy the requirement that the ejector rod 1 does not interfere with the ejector plate 6 during rotation, and that two adjacent ejector rods 1 interfere with each other.

To sum up, the utility model provides a pair of ejection mechanism of mould and plastic mold thereof, the end and the fixed mounting subassembly of ejector pin are connected, and ejecting and/or the motion of returning back are done to fixed mounting subassembly drive ejector pin, and the ejector pin is under the guide effect of direction passageway and guide block, becomes the oblique top by straight the top to the product and carries out the drawing of patterns, has solved the problem of the adjacent two back-off drawing of patterns of product and has guaranteed product quality, has improved production efficiency. The utility model discloses simple structure, the commonality is strong, but the multiple product of adaptation is used. And the ejector rod is small in overall dimension compared with the enlarged inclined ejector block, cannot interfere with other structural parts, is favorable for arrangement of a cooling water channel of the die, and improves the cooling effect of the product.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit and scope of the invention, and it is intended that all equivalent modifications and variations be covered by the appended claims without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a mould ejection mechanism, includes thimble board, thimble fixing plate and back mould, thimble board and thimble fixing plate connect, the back mould is provided with the perpendicular to thimble fixing plate's guide way, its characterized in that: the ejection mechanism also comprises a fixed mounting component and a guide ejection component, wherein,

the fixed mounting assembly is arranged on the thimble fixing plate and is used for driving the guide ejection assembly to perform ejection and/or retraction movement;

the guide ejection assembly comprises an ejection rod and a guide block, the tail end of the ejection rod is connected with the fixed mounting assembly, and the ejection rod is used for demoulding a product from a straight top to an inclined top under the guide effect of the guide channel and the guide block.

2. The mold ejection mechanism of claim 1, wherein: the guide block is embedded on the rear die and provided with a guide hole, and the ejection rod penetrates through the guide hole and is inserted into the guide channel.

3. The mold ejection mechanism of claim 2, wherein: a first guide inclined plane is arranged on the hole wall of the guide hole, and a second guide inclined plane matched with the first guide inclined plane is arranged on one side, facing the first guide inclined plane, of the ejection rod.

4. The mold ejection mechanism of claim 3, wherein: one side of the ejection rod, which deviates from the first guide inclined plane, is provided with a first chamfer part, and when the first guide inclined plane is in matched contact with the second guide inclined plane, the first chamfer part penetrates out of the guide channel.

5. The mold ejection mechanism of claim 1, wherein: the ejector rod is provided with two.

6. The mold ejection mechanism of claim 5, wherein: the two ejection rods are symmetrically arranged and are in a relatively expanded state when obliquely ejecting the product and in a relatively contracted state when retreating.

7. The mold ejection mechanism of claim 1, wherein: the fixed mounting assembly comprises a mounting plate, the mounting plate is embedded on the ejector fixing plate, and a pressing plate is arranged between the mounting plate and the ejector plate.

8. The mold ejection mechanism of claim 7, wherein: the ejection rod is connected with the mounting plate through a rotating pin, and the ejection rod can rotate around the axis of the rotating pin.

9. The mold ejection mechanism of claim 8, wherein: and a second chamfer part is arranged at one end of the ejection rod connected with the mounting plate.

10. A plastic mold, characterized in that: comprising a mold ejection mechanism as in any one of claims 1-9.