CN115723305A - Secondary ejection device and secondary ejection die structure with same - Google Patents

Abstract

The invention belongs to the field of injection mold equipment, and particularly discloses a secondary ejection device and a secondary ejection mold structure with the same, wherein the secondary ejection device comprises a movable mold bottom plate, an ejector pin plate, a surface pin plate and an ejector pin plate insert, wherein the ejector pin plate, the surface pin plate and the ejector pin plate insert are arranged above the movable mold bottom plate; through the reset action of the spring, the ejector plate insert can be prevented from being clamped on the ejector plate, so that the ejector plate insert can move more smoothly in the ejection motion process, secondary ejection motion can be completed, and the whole device is guaranteed to have good stability under long-time ejection motion.

Description

Secondary ejection device and secondary ejection die structure with same

Technical Field

The invention belongs to the field of injection mold equipment, and particularly relates to a secondary ejection device and a secondary ejection mold structure with the same.

Background

In general, the injection molding product is taken out of the injection mold, and the ejection operation is completed in one step. However, for some injection products in the market due to the limitation of product structure and the characteristic requirement of common plastic raw material molding of such products, a glue inlet form during injection molding usually needs to adopt a large side water inlet, the water inlet refers to a joint part between a frame and a product during casting a model and is a communication port between a thermalized liquid plastic raw material and a runner, after the liquid plastic raw material is cooled and solidified, the plastic at the product communication port and a glue injection runner form the water inlet, when the injection molded product is ejected through a product ejector pin, the product is connected with the water inlet, an additional process is needed to separate the product from the water inlet in the subsequent production process, so that after one ejection operation, one ejection operation needs to be added to disconnect the molded product from the water inlet, and at this time, a secondary ejection structure needs to be adopted.

In the prior art, an ejector plate insert is used in a common secondary ejection die structure, but the ejector plate insert in the die structure has poor motion stability, and the ejector plate insert is frequently clamped on the ejector plate in the secondary ejection motion process of the die, so that the ejector plate insert of the die can not smoothly move and can not complete secondary ejection motion, and the product can not be automatically separated according to expectation.

Disclosure of Invention

The invention aims to provide a secondary ejection device and a secondary ejection die structure with the same, which can enable an ejector plate insert to move more smoothly in the ejection motion process and ensure that the whole structure still has better stability under the long-time ejection motion.

In order to realize the purpose, the invention is realized by the following technical scheme: the utility model provides a secondary ejection device, includes the movable mould bottom plate and locates thimble board, face faller and thimble board mold insert of movable mould bottom plate top, the face faller is located the upper end of thimble board and with the thimble board laminating is connected, thimble board mold insert vertical slip is located between thimble board and the face faller, the lower extreme of thimble board mold insert stretch out outside the thimble board, the face faller with support between the thimble board mold insert and hold there is the spring.

Furthermore, a fixing piece penetrates through and is fixedly arranged on the face needle plate, the spring is sleeved at the lower end of the fixing piece, the upper end of the spring abuts against the lower surface of the face needle plate, and the lower end of the spring abuts against the upper surface of the ejector plate insert.

Furthermore, a first groove for accommodating the spring is formed in the position, corresponding to the outer side of the bolt, of the lower end of the needle plate.

Furthermore, a second groove for accommodating the spring is arranged at the position, corresponding to the first groove, of the upper end of the ejector plate insert.

Furthermore, the ejector plate insert is of an inverted U-shaped structure.

Furthermore, a plurality of oil grooves for brushing lubricating oil are formed in the outer surface of the ejector plate insert.

Further, the shape of the oil groove is a circular ring.

Furthermore, the upper end of the movable mould bottom plate is provided with a garbage nail.

The secondary ejection die structure comprises the secondary ejection device.

Furthermore, the secondary ejection die structure further comprises a movable die plate arranged above the face needle plate, an insert groove is formed in the top of the movable die plate, a movable die insert is arranged in the insert groove, a water gap is formed in the top of the movable die insert in a connected mode, a water gap ejector pin is arranged in the face needle plate in a clamped mode and located at the upper end of the ejector plate insert, and the water gap ejector pin penetrates through the movable die plate and the movable die insert upwards and then is connected with the water gap.

Furthermore, the upper end of the surface needle plate is provided with a limiting column.

The invention has the following beneficial effects:

the ejector plate insert in the secondary ejection device is assembled between the ejector plate and the face plate, the ejector plate insert is pressed by an upward force to extrude the spring in a reset state, when the ejector plate is ejected upwards, the ejector plate insert continuously moves downwards under the action of downward elastic force of the spring until the ejector plate insert is completely contacted with the ejector plate, then the ejector plate insert is gradually far away from the movable mold bottom plate, and the ejector plate insert can be prevented from being clamped on the ejector plate through the reset action of the spring, so that the ejector plate insert can move more smoothly in the ejection movement process, secondary ejection can be completed, and the whole device is guaranteed to have good stability under long-time ejection movement.

The secondary ejection die structure comprises the secondary ejection device, and the beneficial effects of the secondary ejection die structure refer to the beneficial effects of the secondary ejection device, which are not repeated herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a secondary ejection device provided in embodiment 1 of the present invention;

fig. 2 is a cross-sectional view of the secondary ejection device according to embodiment 1 of the present invention in another state;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic view of an ejector plate insert, springs and bolts provided in example 1 of the present invention;

fig. 5 is a cross-sectional view of a two-shot ejection mold structure provided in embodiment 2 of the present invention at a first stage;

fig. 6 is a sectional view of a two-shot ejection mold structure provided in embodiment 2 of the present invention at a second stage;

fig. 7 is a cross-sectional view of a two-shot ejector die structure provided in embodiment 2 of the present invention at a third stage.

Fig. 8 is an enlarged view of a portion B in fig. 7.

The labels in the figures illustrate:

1. a movable mold base plate; 2. an ejector plate; 3. a needle board; 4. an ejector plate insert; 5. a spring; 6. moving the template; 7. a water gap; 11. a garbage nail; 31. a bolt; 32. a first groove; 33. a limiting column; 41. a second groove; 42. an oil sump; 61. an insert pocket; 62. a movable mold insert; 70. producing a product; 71. a water gap thimble.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1-4, the secondary ejection device provided in this embodiment includes a movable mold base plate 1, and an ejector plate 2, an ejector pin plate 3, and an ejector pin plate insert 4 that are disposed above the movable mold base plate, where the ejector pin plate 3 is disposed at the upper end of the ejector pin plate 2 and is attached to the ejector pin plate 2, the ejector pin plate insert 4 is vertically slidably disposed between the ejector pin plate 2 and the ejector pin plate 1, the lower end of the ejector pin plate insert 4 extends out of the ejector pin plate 2, and a spring 5 is supported between the ejector pin plate 3 and the ejector pin plate insert 4.

In the above-mentioned structure that this embodiment provided, thimble board insert 4 assembles between thimble board 2 and thimble board 1, under the reset state, thimble board 2 and thimble board insert 4 all contact with movable mould bottom plate 1, under the effect of movable mould bottom plate 1 ascending pressure, thimble board insert 4 upwards moves and extrudes spring 5, when thimble board 2 upwards is ejecting, thimble board 2 keeps away from movable mould bottom plate 1, and thimble board insert 4 continues the downstream under the effect of the downward elasticity of spring 5, until thimble board insert 4 and thimble board 2 complete contact, then thimble board insert 4 also keeps away from movable mould bottom plate 1 gradually, through the reset action of spring 5, can prevent that thimble board insert 4 from blocking on thimble board 2, make thimble board insert 4 can be more smooth in the removal of the in-process of ejecting motion, can accomplish secondary ejecting action, guarantee that whole device still has better stability under long-time ejecting motion.

Specifically, as shown in fig. 1-2, a fixing member is fixedly arranged on the needle plate 3 in a penetrating manner, an upper end of the spring 5 is sleeved at a lower end of the fixing member and is fixedly connected with the fixing member, an upper end of the spring 5 abuts against a lower surface of the needle plate 3, a lower end of the spring 5 abuts against an upper surface of the thimble plate insert 4, the spring 5 can be fixed in position by being fixed at a lower end of the fixing member, and the fixing member can provide a certain auxiliary guiding and limiting effect for the contraction of the upper end of the spring 5.

As a preferred embodiment, in this embodiment, referring to fig. 4, the fixing member is a bolt 31, the bolt 31 can be conveniently mounted on the needle board 3 and fixed, and the lower end of the bolt 31 is also more favorable for the spring 5 to be sleeved, so as to perform a certain limit on the upper end of the spring 5.

In order to further limit the upper end of the spring 5, so that the upper end of the spring 5 is more stable and is not easy to deviate, as shown in fig. 3, a first groove 32 for accommodating the spring 5 is arranged at a position, corresponding to the outer side of the bolt 31, of the lower end of the thimble plate 3, the upper end of the spring 5 is located at a position between the outer side of the bolt 31 and the inner side of the first groove 32, so that the position of the spring 5 can be more stably limited, when the spring 5 is wholly vertically contracted and stressed, the phenomenon that stress is unbalanced and unstable at the upper end of the spring 5 is avoided, the upper end of the spring 5 is prevented from being inclined, and when the spring 5 is wholly vertically contracted and stressed, the position between the outer side of the bolt 31 and the inner side of the first groove 32 can be used for accommodating the contracted part of the upper end of the spring 5, so that the spring 5 is prevented from being excessively extruded.

In order to further limit the lower end of the spring 5, so that the lower end of the spring 5 is more stable and is not easy to deviate, as shown in fig. 3, a second groove 41 for accommodating the spring 5 is arranged at a position, corresponding to the first groove 32, of the upper end of the ejector plate insert 4, the lower end of the spring 5 is located in the second groove 41, and the lower end of the spring 5 can be assisted to be limited, so that when the spring 5 is wholly vertically contracted and stressed, the phenomenon that stress is unbalanced and unstable at the lower end of the spring 5 is avoided, the lower end of the spring 5 is prevented from being inclined, and when the spring 5 is wholly vertically contracted and stressed, the second groove 41 can be used for accommodating the contracted part of the lower end of the spring 5, and the spring 5 is prevented from being excessively extruded.

Specifically, as shown in fig. 4, the configuration of the thimble plate insert 4 is an inverted U-shaped configuration, the lower end of the thimble plate insert 4 extends out of the thimble plate 2, and the upper end of the thimble plate insert 4 is a flat surface capable of better supporting the spring 5.

Specifically, as shown in fig. 4, a plurality of oil grooves 42 are formed in the outer surface of the thimble plate insert 4, and lubricating oil (not shown in the drawing) is provided in the oil grooves 42, so that the thimble plate insert 4 can move more smoothly in the process of the ejector motion, the lubricating oil is brushed on the outer surface of the thimble plate insert 4, and the oil grooves 42 can retain the brushed lubricating oil, so that the surface of the thimble plate insert 4 has the lubricating oil in a certain time, the friction force applied to the thimble plate insert during the motion can be reduced, and the thimble plate insert 4 can move more smoothly and more stably.

Optionally, in order to ensure that the oil groove 42 can retain the lubricating oil brushed on the thimble plate insert 4 for a long time, so that the surface of the thimble plate insert 4 has the lubricating oil for a long time, the diameter of the oil groove 42 is 13mm to 15mm, the depth of the oil groove 42 is 1.5mm to 2.5mm,

in the present embodiment, referring to fig. 4, the oil groove 42 is circular, the diameter of the oil groove 42 is 14mm, and the depth of the oil groove is 2mm, so that the lubricating oil can be stored in the oil groove 42 better without affecting the performance of the ejector plate insert 4.

Specifically, as shown in fig. 1-2, a garbage nail 11 is arranged at the upper end of the movable mold base plate 1, the garbage nail 11 is used between the movable mold base plate 1 and the ejector plate 2 to generate a small gap, and when the movable mold base plate is reset, the ejector plate 2 stops after touching the garbage nail, so that the problem that the ejector plate 2 cannot be completely reset when garbage exists between the movable mold base plate 1 and the ejector plate 2 is solved.

Example 2

Referring to fig. 1 to 8, the secondary ejection mold structure provided in this embodiment includes the secondary ejection apparatus described in embodiment 1, and the return action of the spring 5 in the secondary ejection apparatus can prevent the ejector plate insert 4 from being locked on the ejector plate 2, so that the ejector plate insert 4 can move more smoothly during the ejection motion, and can complete the secondary ejection motion, thereby ensuring that the entire apparatus still has good stability during the long-term ejection motion.

Specifically, the secondary ejection die structure further comprises a movable die plate 6 arranged above the needle plate 3, an insert groove 61 is formed in the top of the movable die plate 6, a movable die insert 62 is arranged in the insert groove 61, a nozzle 7 for molding a product 70 is connected to the top of the movable die insert 62, a nozzle thimble 71 is arranged in the needle plate 3, the nozzle thimble 71 is located at the upper end of the needle plate insert 4, and the nozzle thimble 71 upwardly penetrates through the movable die plate 6 and the movable die insert 62 and then is connected to the nozzle 7.

Specifically, as shown in fig. 5 to 8, a limit post 33 is provided at the upper end of the needle board 3, and the limit post 33 can prevent the needle board 3 from moving upwards excessively to damage the equipment.

Through the structure, in practical application, the secondary ejection die structure shown in the embodiment is divided into three motion stages, in the first stage, in a reset state, the product 70 and the water gap 7 are both in the movable die insert 62, the ejector plate 2 is in contact with the garbage pin 11, the bottom end of the ejector plate insert 4 is in contact with the movable die bottom plate 1, the top end of the ejector plate insert 4 is in contact with the face plate 3, and at the moment, the spring 5 is compressed by accumulating force; in the second stage, the ejector plate 2 is ejected upwards, the spring 5 is rebounded and restored gradually at the moment, the ejector plate insert 4 is pushed stably until the bottom side of the ejector plate insert 4 is attached to the ejector plate 2, the product 70 is ejected for a certain distance in the stage, the position of the water gap 7 is unchanged, and the connection between the product 70 and the water gap 7 can be disconnected in the stage; in the third stage, the ejector plate 2 continues to eject upwards until the limit post 33 on the ejector plate 3 contacts with the movable mould plate 6, and the maximum ejection stroke is reached, so that the product 70 and the water gap 7 are completely separated from the movable mould insert 62, and the mold stripping of the product 70 is realized; in the whole process, due to the existence of the spring 5, the ejector plate insert 4 can be prevented from being clamped on the ejector plate 2 through the reset action of the spring 5, so that the ejector plate insert 4 can move more smoothly in the ejection motion process, secondary ejection can be completed, the product 70 can be automatically separated according to expectation, and the whole structure is guaranteed to have better stability under long-time ejection motion.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (11)

1. The secondary ejection device is characterized by comprising a movable mold base plate, an ejector plate, a face needle plate and an ejector plate insert, wherein the ejector plate, the face needle plate and the ejector plate insert are arranged above the movable mold base plate, the face needle plate is arranged at the upper end of the ejector plate and is attached to the ejector plate, the ejector plate insert is vertically arranged between the ejector plate and the face needle plate in a sliding mode, the lower end of the ejector plate insert extends out of the ejector plate, and a spring is supported between the face needle plate and the ejector plate insert.

2. The secondary ejection device according to claim 1, wherein a fixing member is fixedly inserted through the face pin plate, the spring is sleeved on a lower end of the fixing member, an upper end of the spring abuts against a lower surface of the face pin plate, and a lower end of the spring abuts against an upper surface of the insert of the ejector pin plate.

3. The secondary ejection device according to claim 2, wherein a first recess for accommodating the spring is provided at a position of a lower end of the needle plate corresponding to an outer side of the bolt.

4. The secondary ejection device of claim 3, wherein a second recess for receiving the spring is provided at a position corresponding to the first recess at the upper end of the ejector plate insert.

5. The secondary ejection apparatus of any one of claims 1-4, wherein the ejector plate insert is of inverted U-shaped configuration.

6. The secondary ejection apparatus of claim 5, wherein the outer surface of the ejector plate insert is provided with a plurality of oil grooves for brushing lubricating oil.

7. The secondary ejection device of claim 6 wherein the oil groove is annular in shape.

8. The secondary ejection device of claim 1, wherein the upper end of the movable die bottom plate is provided with a trash nail.

9. A double ejection die structure comprising the double ejection apparatus of any one of claims 1 to 8.

10. The double ejection die structure of claim 9, further comprising a movable die plate disposed above the face pin plate, wherein an insert groove is disposed on a top of the movable die plate, a movable die insert is disposed in the insert groove, a water gap is connected to a top of the movable die insert, a water gap ejector pin is clamped in the face pin plate and located at an upper end of the insert of the ejector plate, and the water gap ejector pin penetrates the movable die plate and the movable die insert upward and is connected to the water gap.

11. The secondary ejection die structure of claim 10, wherein the upper end of the face plate is provided with a spacing post.

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