CN212579120U

CN212579120U - Injection mold with inclined sprue bushing

Info

Publication number: CN212579120U
Application number: CN202020949045.4U
Authority: CN
Inventors: 杨日熙
Original assignee: Dongguan Jingsheng Precision Plastic Mould Technology Co ltd
Current assignee: Dongguan Jingsheng Precision Plastic Mould Technology Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-23
Anticipated expiration: 2030-05-29

Abstract

The utility model belongs to the technical field of the injection mold technique and specifically relates to indicate an injection mold of oblique purt mouth in area, it includes preceding template, back template, preceding mold core and back mold core, preceding mold core corresponds the setting with back mold core, preceding mold core encloses with back mold core and establishes the formation die cavity, still include the mouth of a river thimble, preceding template mounting has oblique purt mouth, the central axis of oblique purt mouth is 10 with the central axis cross angle of preceding mold core, back mold core is equipped with a plurality of mouth of a river thimble via holes, back template is equipped with second mouth of a river thimble through-hole, mouth of a river thimble via hole is equipped with oblique vacancy. The oblique sprue bushing is compared in the oblique sprue bushing of traditional slope 20, has shortened the runner flow, reduces heat loss and loss of pressure, shortens the flow and has reduced material handle weight and reduce the material waste, obviously shortens the shaping cycle, improves fashioned efficiency, and the lateral wall of mouth of a river thimble reduces with the area of contact in oblique vacancy, can effectively avoid the mouth of a river thimble to burn out, slows down the wearing and tearing of mouth of a river thimble, prolongs the life of mouth of a river thimble.

Description

Injection mold with inclined sprue bushing

Technical Field

The utility model belongs to the technical field of the injection mold technique and specifically relates to indicate an injection mold of oblique purt mouth in area.

Background

The mold is an indispensable important tool in injection molding, and the injection molding is a processing method for injecting hot-melt plastic materials into a closed cavity with a required shape in the mold at a high speed, opening the mold to eject a solidified plastic product after the plastic materials are cooled and solidified, so as to obtain a molded product. The injection molding processing method has the characteristics of low molding cost, short molding period, simple molding process, easiness in molding of plastic products with complex shapes and the like, so that the injection molding processing method is widely applied to the field of plastic products.

The inclination of the traditional oblique squirt nozzle is usually set to be 20 degrees, the flow path of the flow channel is lengthened, the heat loss of the molten plastic is serious, the molding is affected, the period of the injection molding is lengthened, and the production efficiency is reduced.

In addition, the traditional mold nozzle thimble is a cylindrical ejector rod with the same outer diameter, when the nozzle thimble ejects an injection molding workpiece, the outer side wall of the nozzle thimble rubs with the inner wall of the through hole of the nozzle thimble, the ejection resistance is large, when the nozzle thimble reciprocates, the loss of the nozzle thimble is very large, and the service life of the nozzle thimble is very short.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an injection mold of oblique purt mouth in area shortens the runner flow, effectively reduces the heat loss, and the injection moulding cycle shortens, and oblique vacancy can effectively avoid the mouth of a river thimble to burn out, slows down the wearing and tearing of mouth of a river thimble, prolongs the life of mouth of a river thimble.

In order to solve the technical problem, the utility model discloses a following technical scheme:

an injection mold with an inclined sprue bushing comprises a front mold plate, a rear mold plate arranged corresponding to the front mold plate, a front mold core arranged on the front mold plate and a rear mold core arranged on the rear mold plate, wherein the front mold core and the rear mold core are arranged correspondingly, the front mold core and the rear mold core are surrounded to form a mold cavity, the three-plate mold further comprises water gap ejector pins, an oblique sprue bushing is installed on the front mold plate, a main runner is arranged on the oblique sprue bushing, the central axis of the oblique sprue bushing and the central axis of the front mold core are in a cross angle of 10 degrees, the rear mold core is provided with a plurality of water gap ejector pin through holes, the rear mold plate is provided with a plurality of second water gap ejector pin through holes respectively communicated with the plurality of water gap ejector pin through holes, the water gap ejector pins sequentially penetrate through the second water gap ejector pin through holes and the water gap ejector pin through holes, the water gap ejector pin through holes are provided with oblique vacant positions, the upper port caliber of each oblique vacant position is smaller than the lower port caliber of each oblique vacant position, and the.

Furthermore, the device also comprises a flange arranged on the front template, and the inclined squirt nozzle is arranged on the flange.

The lower end of the water gap ejector pin is fixedly arranged on the ejector plate; when the ejector plate moves upwards, the water gap ejector pin protrudes into the die cavity.

Further, still include bed plate, backing plate and two square irons, backing plate and back template fixed mounting, the upper end and the backing plate fixed mounting of square iron, the lower extreme and the bed plate fixed mounting of square iron, the thimble board slides and sets up between bed plate and backing plate.

Further, the base plate is provided with a plurality of third water gap thimble through holes communicated with the second water gap thimble through holes, the water gap thimbles sequentially penetrate the third water gap thimble through holes, the second water gap thimble through holes and the water gap thimble through holes, the inner diameter of each third water gap thimble through hole is larger than the outer diameter of each water gap thimble, the cross sections of the water gap thimbles, the third water gap thimble through holes and the second water gap thimble through holes are rectangular, and the cross sections of the water gap thimble through holes are isosceles trapezoids.

The utility model has the advantages that: the cross angle between the central axis of the oblique squirt nozzle and the central axis of the front mold core is 10 degrees, compared with the traditional oblique squirt nozzle inclined by 20 degrees, the flow path is shortened, the heat loss and the pressure loss are reduced, the flow path is shortened, the weight of the material handle is reduced, the material waste is reduced, the mold opening and closing period of the two-plate mold is obviously faster than that of the three-plate mold, the flow path is shortened, the molding period can be obviously shortened, and the molding efficiency is greatly improved; the cross section of the inclined vacant site is isosceles trapezoid, so that the contact area between the outer side wall of the nozzle thimble and the inclined vacant site is reduced, the nozzle thimble can be effectively prevented from being burned, the abrasion of the nozzle thimble is reduced, and the service life of the nozzle thimble is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the oblique squirt nozzle and the main runner of the present invention.

Fig. 3 is the structure schematic diagram of the nozzle thimble via hole, the oblique vacancy, the nozzle thimble and the rear mold core of the utility model.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1 to 3, the utility model provides an injection mold with an inclined sprue bushing, which comprises a front mold plate 1, a rear mold plate 2 corresponding to the front mold plate 1, a front mold core 3 arranged on the front mold plate 1, and a rear mold core 4 arranged on the rear mold plate 2, wherein the front mold core 3 and the rear mold core 4 are arranged correspondingly, the front mold core 3 and the rear mold core 4 enclose to form a mold cavity 12, the three-plate mold further comprises a nozzle thimble 5, the front mold plate 1 is provided with the inclined sprue bushing 6, the inclined sprue bushing 6 is provided with a main runner 61, the intersection angle between the central axis of the inclined sprue bushing 6 and the central axis of the front mold core 3 is 10 degrees, the rear mold core 4 is provided with a plurality of nozzle thimble through holes 41, the rear mold plate 2 is provided with a plurality of second nozzle thimble through holes 21 respectively communicated with the plurality of nozzle thimble through holes 41, the nozzle thimble 5 sequentially passes through the second nozzle thimble through holes 21 and the nozzle thimble through holes 41, the nozzle thimble through, the aperture of the upper port of the inclined vacant site 42 is smaller than the aperture of the lower port of the inclined vacant site 42, and the inner diameter of the second nozzle thimble through hole 21 is larger than the outer diameter of the nozzle thimble 5.

In practical application, the inclined squirt nozzle 6 is used for realizing the purpose that the large water gap of the two plate dies is changed into submerged glue feeding, the intersection angle of the central axis of the inclined squirt nozzle 6 and the central axis of the front die core 3 is 10 degrees, compared with the traditional inclined squirt nozzle inclined by 20 degrees, the flow channel process is shortened, the heat loss and the pressure loss are reduced, the weight of a material handle is reduced by shortening the flow channel, the material waste is reduced, the die opening and closing period of the two plate dies is obviously faster than that of the three plate dies, the flow channel is shortened, the forming period can be obviously shortened, and the forming efficiency; the cross section of the inclined vacancy 42 is isosceles trapezoid, so that the contact area between the outer side wall of the nozzle thimble 5 and the inclined vacancy 42 is reduced, the nozzle thimble 5 can be effectively prevented from burning, the abrasion of the nozzle thimble 5 is reduced, and the service life of the nozzle thimble 5 is prolonged.

In this embodiment, still including installing in the flange 7 of front formwork 1, purt mouth 6 is installed in flange 7 to one side, and flange 7 is used for being 10 degrees purt mouths 6 to one side and keeps the slope setting, improves the precision of gradient, and it is effectual to annotate the material.

In the embodiment, the device also comprises an ejector plate 8 which is slidably mounted with the rear template 2, and the lower end of the water gap ejector pin 5 is fixedly mounted on the ejector plate 8; when the ejector plate 8 moves upwards, the water gap ejector pin 5 extends into the die cavity 12. When the mold is opened, the molded plastic part is positioned in the mold cavity 12, the ejector pin plate 8 moves upwards to drive the water gap ejector pin 5 to move upwards, and the water gap ejector pin 5 ejects the molded plastic part out of the mold cavity 12 to finish demolding.

In this embodiment, still include bed plate 9, backing plate 10 and two square irons 11, backing plate 10 and back template 2 fixed mounting, the upper end and the backing plate 10 fixed mounting of square iron 11, the lower extreme and the bed plate 9 fixed mounting of square iron 11, ejector plate 8 slides and sets up between bed plate 9 and backing plate 10. The base plate 9, the base plate 10 and the two square irons 11 are arranged in a rectangular shape, the base plate 9, the base plate 10 and the two square irons 11 are surrounded to form a space, the ejector plate 8 is located in the space to move, the action that the ejector pin 5 of the water gap ejects the formed plastic part out of the mold cavity 12 is achieved, and the demolding action is completed.

In this embodiment, the base plate 10 is provided with a plurality of third nozzle thimble through holes 101 communicated with the second nozzle thimble through hole 21, the nozzle thimbles 5 sequentially pass through the third nozzle thimble through holes 101, the second nozzle thimble through holes 21 and the nozzle thimble through holes 41, the inner diameter of the third nozzle thimble through holes 101 is greater than the outer diameter of the nozzle thimbles 5, the inner diameter of the second nozzle thimble through holes 21 is greater than the outer diameter of the nozzle thimbles 5, the outer side walls of the nozzle thimbles 5 are prevented from being in direct contact with the inner walls of the third nozzle thimble through holes 101, abrasion of the nozzle thimbles 5 is reduced, the cross sections of the nozzle thimbles 5, the cross sections of the third nozzle thimble through holes 101 and the cross sections of the second nozzle thimble through holes 21 are rectangular, and.

All the technical features in the embodiment can be freely combined according to actual needs.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

Claims

1. The utility model provides an injection mold of oblique purt mouth in area, includes preceding template (1), corresponds back template (2) that sets up with preceding template (1), sets up in preceding mold core (3) of preceding template (1) and sets up in back mold core (4) of back template (2), and preceding mold core (3) and back mold core (4) are corresponding to be set up, and preceding mold core (3) enclose with back mold core (4) and establish and form die cavity (12), its characterized in that: still include mouth of a river thimble (5), oblique sprue bushing (6) is installed in front template (1), oblique sprue bushing (6) are equipped with sprue (61), the central axis of oblique sprue bushing (6) is 10 with the central axis cross angle of preceding mold core (3), back mold core (4) are equipped with a plurality of mouth of a river thimble via holes (41), back template (2) are equipped with a plurality of second mouth of a river thimble through-holes (21) that communicate with a plurality of mouth of a river thimble via holes (41) respectively, second mouth of a river thimble through-hole (21) and mouth of a river thimble via hole (41) are passed in proper order in mouth of a river thimble (5), mouth of a river thimble via hole (41) are equipped with oblique vacancy (42), the upper port bore of oblique vacancy (42) is less than the lower port bore of oblique vacancy (42), the internal diameter of second mouth of a river thimble through-hole (21) is greater.

2. An injection mold with an inclined sprue bushing according to claim 1, wherein: the device also comprises a flange (7) arranged on the front template (1), and the oblique sprue bushing (6) is arranged on the flange (7).

3. An injection mold with an inclined sprue bushing according to claim 1, wherein: the lower end of the water gap thimble (5) is fixedly arranged on the thimble plate (8); when the ejector plate (8) moves upwards, the water gap ejector pin (5) extends into the die cavity (12) in a protruding mode.

4. An injection mold with an inclined sprue bushing according to claim 3, wherein: still include bed plate (9), backing plate (10) and two square irons (11), backing plate (10) and back template (2) fixed mounting, the upper end and backing plate (10) fixed mounting of square iron (11), the lower extreme and bed plate (9) fixed mounting of square iron (11), ejector plate (8) slide to set up between bed plate (9) and backing plate (10).

5. An injection mold with an inclined sprue bushing according to claim 4, wherein: the backing plate (10) is equipped with a plurality of third mouth of a river thimble through-holes (101) that communicate with a plurality of second mouth of a river thimble through-holes (21) respectively, third mouth of a river thimble through-hole (101) is passed in proper order in mouth of a river thimble (5), second mouth of a river thimble through-hole (21) and mouth of a river thimble through-hole (41), the internal diameter of third mouth of a river thimble through-hole (101) is greater than the external diameter of mouth of a river thimble (5), the cross section of third mouth of a river thimble through-hole (101) and the cross section of second mouth of a river thimble through-hole (21) all are the rectangle.