CN214188271U

CN214188271U - Automatic separation mechanism for sprue of injection mold

Info

Publication number: CN214188271U
Application number: CN202023223989.2U
Authority: CN
Inventors: 齐海元; 徐晓阳; 李金国
Original assignee: Zhangjiagang Zhongtian Precision Molding Co ltd
Current assignee: Zhangjiagang Zhongtian Precision Molding Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-14
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses an automatic separating mechanism for a sprue of an injection mold, which comprises an injection runner concavely arranged between an upper mold and a lower mold, and a sprue insert, wherein the left side and the right side of the sprue insert are respectively communicated with an injection molding cavity and the injection runner and are arranged in the lower mold in a penetrating way; a communicating sprue is arranged in the sprue insert, the upper surface of the communicating sprue gradually inclines downwards and extends along the direction close to the injection molding cavity, and an acute angle is formed between the upper surface of the communicating sprue and the left side surface of the sprue insert; the injection molding runner comprises a hook hanging hole which is downwards arranged in the lower die from the lower surface and is positioned below the communicating sprue; the automatic separation mechanism further comprises a liftable first ejector rod which is arranged in the lower die in a penetrating mode, the top end of the first ejector rod is located below the injection molding runner, and the top end of the first ejector rod is located between the pouring gate insert and the hook hole. The utility model relates to an autosegregation mechanism for injection mold runner, the completion back of moulding plastics, at product drawing of patterns in-process, can realize the autosegregation of product and runner.

Description

Automatic separation mechanism for sprue of injection mold

Technical Field

The utility model relates to an automatic separation mechanism for injection mold runner.

Background

In the injection molding process, for a product with glue fed from an open side gate, after the product is injection molded, a runner needs to be cut off by a manual or targeted jig subsequently. The production mode is easy to cause the problems of missed shearing, mixing of shearing flow channels in products and the like. Particularly, when a product with multiple mold cavities and needing cavity division packaging is produced, the mixed loading of products with different mold cavities is easy to cause. When parts are produced in large batch and multiple shifts, problems such as missing shearing, mixed loading and the like are extremely difficult to find in time. These problems increase the production cost and the production cycle, and increase the risk of quality control.

Disclosure of Invention

The utility model aims at providing an autosegregation mechanism for injection mold runner, the back is accomplished in moulding plastics, can realize the autosegregation of product and runner.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

an automatic separating mechanism for a sprue of an injection mold comprises an injection runner concavely arranged between an upper mold and a lower mold, and a sprue insert, wherein the left side and the right side of the sprue insert are respectively communicated with an injection molding cavity and the injection runner and penetrate through the lower mold;

a communicating sprue is arranged in the sprue insert, the upper surface of the communicating sprue gradually inclines downwards and extends along the direction close to the injection molding cavity, and an acute angle is formed between the upper surface of the communicating sprue and the left side surface of the sprue insert;

the injection molding runner comprises a hook hanging hole which is downwards arranged in the lower die from the lower surface of the injection molding runner and is positioned below the communicating sprue;

the automatic separation mechanism further comprises a first lifting ejector rod penetrating through the lower die and located below the injection molding runner at the top end, and the top end of the first ejector rod is located between the pouring gate insert and the hook hanging hole.

Preferably, the lower surface of the injection runner between the gate insert and the top end of the first ejector rod is concave upwards in an arc shape.

Preferably, the gate insert is tapered from bottom to top.

Preferably, the hook hole is gradually inclined from top to bottom to be close to the first top rod.

Preferably, the injection molding runner further comprises a cylindrical hole which is formed in the lower die and located above the first ejector rod and is downwards recessed from the lower surface of the injection molding runner.

More preferably, the injection molding runner comprises a runner body extending in the left-right direction, the gate insert is communicated with the left end of the runner body through the communicating gate, and the cylindrical hole and the hooking hole are both located below the runner body.

Preferably, the gate insert is inserted into the lower mold in a downward detachable manner, and an upper end of the gate insert protrudes upward out of the lower mold.

Preferably, the automatic separating mechanism further comprises a driving assembly for driving the first ejector rod to move upwards, and the driving assembly is further used for driving the lower die to move upwards in a delayed manner.

More preferably, the driving assembly comprises a fixed plate, a lifting plate arranged above the fixed plate in a lifting manner, a driving rod arranged in the fixed plate in a penetrating manner in a lifting manner and with a top end fixedly arranged on the lifting plate, and the lower end of the first ejector rod is fixedly arranged on the lifting plate;

the driving assembly further comprises a guide groove arranged in the lifting plate, a guide post arranged in the guide groove and capable of being lifted, a limiting ring arranged at the upper end and the lower end of the guide groove and used for limiting the guide post, a second ejector rod with the upper end connected with the bottom end of the guide post and the lower end connected with the fixed plate in a butting mode, and a third ejector rod with the top end of the guide post and the lower end connected with the lower die.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model relates to an automatic separating mechanism for a sprue of an injection mold, which changes an open side sprue into a closed side sprue by arranging a sprue insert; by setting the inclined direction of the upper surface of the communicating sprue, when a product is molded and demoulded, the first ejector rod jacks up a runner colloid solidified in an injection molding runner, and the acute-angle edge above the communicating sprue is cut off, so that the product can be automatically separated from the sprue on the runner colloid; through setting up the hook hole, can avoid the runner colloid in jack-up in-process, turn on one's side to the runner mold insert and transduce and cause unable atress excision, improved the success rate of excision.

Drawings

Fig. 1 is a schematic structural diagram of the device of the present invention.

Wherein: 1. a lower die; 2. injection molding a runner; 3. an injection molding cavity; 4. a pouring gate insert; 5. communicating the pouring gate; 6. a hooking hole; 7. a first ejector rod; 8. a cylindrical hole; 9. a fixing plate; 10. a lifting plate; 11. a drive rod; 12. a guide groove; 13. a guide post; 14. a limiting ring; 15. a second ejector rod; 16. and a third ejector rod.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, the automatic separation mechanism for the gate of the injection mold comprises an injection runner 2 concavely arranged between an upper mold (not shown) and a lower mold 1, and a gate insert 4, the left side and the right side of which are respectively communicated with an injection cavity 3 and the injection runner 2 and are arranged in the lower mold 1 in a penetrating manner. The injection molding cavity 3 is also concavely arranged between the upper die and the lower die 1 and is a cavity for molding a product. In the present embodiment, the injection molding cavity 3, the gate insert 4 and the injection molding runner 2 are sequentially communicated from left to right. The open side gate is changed to a closed side gate by providing the gate insert 4.

A communicating sprue 5 is arranged in the sprue insert 4, the communicating sprue 5 penetrates through the sprue insert 4 along the left-right direction, the left side of the communicating sprue 5 is communicated with the injection molding cavity 3, and the right side of the communicating sprue 5 is communicated with the injection molding runner 2. The upper surface of the communicating gate 5 extends gradually downward in a direction approaching the injection cavity 3 (a direction from right to left), and forms an acute angle with the left side surface of the gate insert 4, the acute angle being pointed downward.

Through setting up the incline direction of intercommunication runner 5 upper surface, when the product shaping drawing of patterns, upwards jack-up runner colloid of solidifying in the runner 2 of moulding plastics cuts the runner colloid through the sharp angle edge of intercommunication runner 5 top, can realize the autosegregation of runner on product and the runner colloid.

The injection runner 2 includes a hooking hole 6 formed in the lower mold 1 so as to be recessed downward from the lower surface thereof and located below the communicating gate 5. The automatic separating mechanism for the injection mold sprue further comprises a liftable first ejector rod 7 which penetrates through the lower mold 1 and is located below the injection molding runner 2 at the top end, and the top end of the first ejector rod 7 is located between the sprue insert 4 and the hook hole 6.

In this embodiment, the hooking hole 6 is gradually inclined from the top to the bottom near the first stem 7.

Through setting up hook hole 6, the runner colloid forms the couple in hook hole 6, can avoid the runner colloid at the in-process by first ejector pin 7 jack-up, to the unable atress excision of runner mold insert 4 side turning on one's side transduction and sending, has improved the success rate of excision. The couple can hang runner colloid right side, and when first ejector pin 7 jack-up runner colloid middle part, the left side that makes the runner colloid can the atress pull upper right to acute angle edge through 5 tops of intercommunication runner is amputated the runner colloid.

In the present embodiment, the lower surface of the injection runner 2 between the gate insert 4 and the top end of the first carrier rod 7 is concave upward in an arc shape.

Through the arrangement, an arc transition area is formed, so that the left side of the runner colloid is more favorably deformed in the cutting process of the runner colloid, and the cutting success rate is further improved.

The injection molding runner 2 further comprises a cylindrical hole 8 which is arranged in the lower die 1 from the lower surface to the lower concave and is positioned above the first ejector rod 7. The cylindrical hole 8 is located right above the first top bar 7 and extends coaxially with the first top bar 7.

Through setting up cylindricality hole 8, the runner colloid forms the cylinder in cylindricality hole 8, and during first ejector pin 7 upward movement, exert pressure to the runner colloid through this cylinder, be favorable to the left deformation of runner colloid equally, can also prevent to get in touch too early to deviate from in hook hole 6 simultaneously, has further improved the success rate of excision.

In this embodiment, the injection molding runner 2 includes a runner body extending in the left-right direction, the gate insert 4 is communicated with the left end of the runner body through the communication gate 5, and the cylindrical hole 8 and the hook hole 6 are both located below the runner body, i.e. the cylinder and the hook are both formed below the runner body.

In this embodiment, the gate insert 4 is tapered from bottom to top, and by this arrangement, the angle that communicates the acute angle between the upper surface of the gate 5 and the left side surface of the gate insert 4 is reduced, the success rate of cutting is further improved, and the notch is made smooth.

The automatic separating mechanism for the injection mold pouring gate further comprises a driving assembly used for driving the first ejector rod 7 to move upwards, and the driving assembly is also used for driving the lower mold 1 to move upwards in a delayed mode.

After the product is injection molded, when the mold is opened, the upper mold firstly moves upwards, then the driving assembly drives the first ejector rod 7 to jack up the solidified runner colloid in the injection molding runner 2 upwards, and the sprue of the runner colloid is cut off through the edge of the acute angle above the communicating sprue 5; and then the driving component drives the lower die 1 to move upwards in a delayed mode to drive the product to move upwards synchronously, and the product with the sprue cut off is grabbed by the manipulator.

In this embodiment, the gate insert 4 is inserted into the lower mold 1 so as to be detachable downward, and the upper end of the gate insert 4 protrudes upward out of the lower mold 1. With this arrangement, when the lower mold 1 moves upward, the gate insert 4 can fall off downward from the lower mold 1 due to its own weight.

The driving assembly comprises a fixed plate 9, a lifting plate 10 arranged above the fixed plate 9 in a lifting mode, a driving rod 11 arranged in the fixed plate 9 in a penetrating mode in the lifting mode and fixedly arranged on the lifting plate 10 at the top end in the lifting mode, and the lower end of the first ejector rod 7 is fixedly arranged on the lifting plate 10.

The driving assembly further comprises a guide groove 12 arranged in the lifting plate 10, a liftable guide post 13 arranged in the guide groove 12, a limiting ring 14 arranged at the upper end and the lower end of the guide groove 12 and used for limiting the guide post 13, a second ejector rod 15 with the upper end connected with the bottom end of the guide post 13 and the lower end abutted against the fixed plate 9, and a third ejector rod 16 with the two ends respectively connected with the top end of the guide post 13 and the lower die 1.

Referring to fig. 1, the guide groove 12 is located in the lifting plate 10, the limiting rings 14 at the upper and lower ends of the guide groove are also located in the lifting plate 10, and the length of the guide groove 12 is greater than that of the guide column 13. The second top rod 15 penetrates through the lower limiting ring 14 and downwards penetrates out of the lifting plate 10; the third top bar 16 is inserted into the upper limit ring 14 and extends upwards out of the lifting plate 10.

When the lower die 1 is in a die closing position, the bottom ends of the guide posts 13 and the limiting rings 14 below are arranged at intervals in the vertical direction. When the mold is opened, the driving rod 11 drives the lifting plate 10 to ascend, the first ejector rod 7 ascends synchronously, and the guide column 13 keeps still until the lower limit ring 14 abuts against the lower end of the guide column 13, so that the delayed jacking of the lower mold 1 is realized. The driving rod 11 drives the lifting plate 10 to rise continuously, the first push rod 7 and the third push rod 16 rise synchronously, and the second push rod 15 is separated from the fixed plate 9 upwards.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides an automatic separating mechanism for injection mold runner which characterized in that: the injection molding device comprises an injection molding runner concavely arranged between an upper die and a lower die, and a gate insert, wherein the left side and the right side of the gate insert are respectively communicated with an injection molding cavity and the injection molding runner and are arranged in the lower die in a penetrating way;

2. An automatic release mechanism for an injection mold gate as in claim 1, wherein: and the lower surface of the injection molding runner between the sprue insert and the top end of the first ejector rod is concave inwards in an arc shape.

3. An automatic release mechanism for an injection mold gate as in claim 1, wherein: the sprue insert is gradually tapered from bottom to top.

4. An automatic release mechanism for an injection mold gate as in claim 1, wherein: the hook hanging hole is gradually inclined from top to bottom to be close to the first ejector rod.

5. An automatic release mechanism for an injection mold gate as in claim 1, wherein: the runner of moulding plastics still includes and is located by its lower surface is sunken in the lower mould and be located the cylindrical hole of first ejector pin top.

6. An automatic release mechanism for an injection mold gate according to claim 5, wherein: the injection molding runner comprises a runner body extending along the left-right direction, the sprue insert is communicated with the left end of the runner body through the communicating sprue, and the cylindrical hole and the hook hole are both located below the runner body.

7. An automatic release mechanism for an injection mold gate as in claim 1, wherein: the gate insert can be downwards separated and penetrates through the lower die, and the upper end of the gate insert upwards penetrates out of the lower die.

8. An automatic release mechanism for an injection mold gate as in claim 1, wherein: the automatic separation mechanism further comprises a driving assembly used for driving the first ejector rod to move upwards, and the driving assembly is further used for driving the lower die to move upwards in a delayed mode.

9. An automatic release mechanism for an injection mold gate as in claim 8, wherein: the driving assembly comprises a fixed plate, a lifting plate arranged above the fixed plate in a lifting manner, a driving rod which penetrates through the fixed plate in a lifting manner and is fixedly arranged on the lifting plate at the top end, and the lower end of the first ejector rod is fixedly arranged on the lifting plate;