CN108724636B

CN108724636B - Mold capable of being formed by secondary injection

Info

Publication number: CN108724636B
Application number: CN201810723974.0A
Authority: CN
Inventors: 廖炳坤; 陈林; 陈慧丰; 张德状; 苏贤文
Original assignee: Suzhou Pin Shine Technology Co ltd
Current assignee: Suzhou Pin Shine Technology Co ltd
Priority date: 2018-03-12
Filing date: 2018-07-04
Publication date: 2024-02-23
Anticipated expiration: 2038-07-04
Also published as: CN108724636A; CN208645890U

Abstract

The invention discloses a mold capable of being formed by secondary injection, which sequentially comprises a female mold pressing plate, a female mold, a male mold pressing plate and an ejection mechanism from top to bottom, wherein a male mold glue position is formed on one side of the male mold, which is close to the female mold, a first insert capable of being overturned is arranged in the female mold, and a first female mold glue position and a second female mold glue position which are matched with the male mold glue position are respectively formed on two sides of the first insert. The mold capable of being formed by secondary injection molding is reasonable in structural design, and the reversible inserts are arranged in one set of mold, so that two different cavities are formed in the mold, the inserts are controlled to turn after primary injection molding, and then secondary injection is performed, so that a final product is obtained, the mold does not need to be replaced, the service life of the mold is prolonged, manpower and material resources are saved, the production time is shortened, the production efficiency is improved, the production cost is reduced, the benefit is improved, and the mold has good application and popularization prospects.

Description

Mold capable of being formed by secondary injection

Technical Field

The invention relates to the technical field of dies, in particular to a die capable of being formed by secondary injection.

Background

Industrial dies are used to form various molds and tools for injection molding, blow molding, extrusion, die casting or forging, smelting, stamping, etc. to produce the desired product. The mold has a cavity with the same structural size as the part to be prepared, and the liquid is poured into the cavity, so that the part with the same structural size as the cavity can be formed after the liquid is cooled and solidified.

In the prior art, products with a plurality of specific requirements can be prepared by injection molding twice or even more, and most of the existing solutions are to prepare a plurality of sets of molds. Taking two sets of moulds as an example, firstly carrying out injection molding in a first set of moulds to prepare a primary injection product, then placing the obtained primary injection product into a cavity of a second set of moulds for continuous injection molding, and further obtaining a secondary injection product; or after primary injection molding in a set of mold, the male mold or the female mold is replaced to form different cavities, and then secondary injection molding is carried out to obtain a secondary injection product.

The mode can bring a plurality of problems, can more synthesize manufacturing cost, increase the technology degree of difficulty, reduced production efficiency moreover, frequent change mould can not only shorten the life of mould, increases the maintenance cost of mould, also can have the potential safety hazard when changing the mould, takes place the accident easily.

Disclosure of Invention

In view of the above, in order to overcome the defects of the prior art, the invention aims to provide a mold capable of being formed by secondary injection, which has reasonable structural design, can be formed by secondary injection without changing the mold, improves the production efficiency and reduces the production cost.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a but secondary injection molding's mould, the mould is from top to bottom including female die clamp plate, female die, public mould clamp plate and ejection mechanism in proper order, public mould is close to one side of female die has been seted up public mould and has been glued the position, be provided with the first mold insert that can overturn in the female die, the both sides of first mold insert have been seted up respectively with public mould glues the position and second female die glues the position that the position matches.

Preferably, a rotating mechanism for driving the first insert to rotate is arranged on the female die, and the rotating mechanism comprises a gear positioned at one end of the first insert, a rack matched with the gear, and a first driving device for driving the rack to stretch out and draw back.

Preferably, a first round rod and a second round rod are arranged at two ends of the first insert, a thread structure is arranged at the end part, far away from the second round rod, of the first round rod, and a thread sleeve matched with the thread structure is arranged on the female die.

Preferably, a limiting piece is arranged on the first insert, and a limiting hole matched with the limiting piece is formed in the female die.

More preferably, the limiting piece comprises a circular ring and an arc-shaped protrusion positioned at the periphery of the circular ring; the limiting hole comprises an arc notch for the arc-shaped protrusion to rotate.

Further preferably, the circumferential angle corresponding to the arc-shaped protrusion is 90 degrees, and the circumferential angle corresponding to the arc-shaped notch is 270 degrees.

Preferably, a filling rod is arranged in the male mold glue position, and a first moving plate for driving the filling rod to move is further arranged on the male mold.

Preferably, the male die is further provided with a second insert capable of entering and exiting the male die glue position.

Preferably, the male die and the female die are provided with positioning and locking devices on the outer side surfaces, and the positioning and locking devices comprise a bolt arranged on one outer side surface of the male die and one outer side surface of the female die and a socket which is arranged on the other outer side surface of the male die and the female die and matched with the bolt.

Preferably, a positioning column is arranged on one surface of the male die and one surface of the female die, which are close to each other, and a positioning hole matched with the positioning column is arranged on the other surface of the male die and the other surface of the female die, which are close to each other.

Compared with the prior art, the invention has the following advantages: the mold capable of being subjected to secondary injection molding is reasonable in structural design, and the reversible inserts are arranged in one set of mold, so that two different cavities are formed in the mold, the inserts are controlled to turn after primary injection molding, secondary injection molding is performed, a final product is obtained, the mold is not required to be replaced, the service life of the mold is prolonged, manpower and material resources are saved, the production time is shortened, the production efficiency is improved, the production cost is reduced, the benefit is improved, and the mold has good application and popularization prospects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a two shot mold according to a preferred embodiment of the present invention;

FIG. 2 is a top view of a male mold in a two shot mold according to a preferred embodiment of the present invention;

FIG. 3 is an enlarged view of section I of FIG. 2;

FIG. 4 is a cross-sectional view of A-A of FIG. 2;

FIG. 5 is an enlarged view of section II of FIG. 4;

FIG. 6 is a cross-sectional view of B-B in FIG. 2;

FIG. 7 is an enlarged view of section III of FIG. 6;

FIG. 8 is a bottom view of a master mold in a two shot mold in accordance with a preferred embodiment of the present invention;

FIG. 9 is an enlarged view of section IV of FIG. 8;

FIG. 10 is a perspective view of a first insert in accordance with a preferred embodiment of the present invention;

FIG. 11 is a perspective view of a second view of the first insert in accordance with the preferred embodiment of the present invention;

FIG. 12 is a perspective view of a first shot molded product in accordance with a preferred embodiment of the present invention;

FIG. 13 is a perspective view of a second view of a first injection molded product in accordance with a preferred embodiment of the present invention;

FIG. 14 is a perspective view of a second shot molded product of a preferred embodiment of the present invention from a first perspective;

FIG. 15 is a perspective view of a second shot molded product in accordance with a preferred embodiment of the present invention;

FIG. 16 is a perspective view of a rotation mechanism in a preferred embodiment of the present invention;

fig. 17 is an enlarged view of the V portion of fig. 16;

fig. 18 is a front view of the turning mechanism in the preferred embodiment of the present invention;

FIG. 19 is a schematic view of a stop and a stop aperture in a rotary mechanism according to a preferred embodiment of the present invention;

FIG. 20 is an enlarged view of section VI of FIG. 19;

FIG. 21 is a perspective view of the ejection mechanism of the preferred embodiment of the present invention without ejection;

fig. 22 is an enlarged view of part VII in fig. 21;

FIG. 23 is a perspective view of the ejection mechanism of the preferred embodiment of the present invention with the first ejector pin ejected;

FIG. 24 is an enlarged view of section VIII of FIG. 23;

FIG. 25 is a perspective view of the ejection mechanism of the preferred embodiment of the present invention showing the ejection of the first and second pins;

fig. 26 is an enlarged view of the portion IX in fig. 25;

FIG. 27 is a perspective view of a plug in a two shot mold according to a preferred embodiment of the present invention;

FIG. 28 is a perspective view of a socket in a two shot mold in accordance with a preferred embodiment of the present invention;

in the accompanying drawings: a top plate-1, a female die pressing plate-2, a female die-3, a first female die glue position-301, a second female die glue position-302, a male die-4, a male die glue position-401, a male die pressing plate-5, a bottom plate-6, a first insert-701, a second insert-702, a first round bar-801, a second round bar-802, a threaded structure-803, a threaded sleeve-804, a notch-805, a gear-9, a rack-10, a limiting piece-11, a first end face-1101, a second end face-1102, a circular ring-1103, an arc-shaped protrusion-1104, a limiting hole-12, a third end face-1201, a fourth end face-1202, a filling bar-13, a first moving plate-1401, a second moving plate-1402, a first driving device-1501, the second driving device-1502, the third driving device-1503, the first injection molding product-1601, the second injection molding product-1602, the first end-1603, the second end-1604, the runner-17, the groove-18, the first pull rod-1901, the second pull rod-1902, the chute-20, the slide block-21, the first ejector plate-2201, the second ejector plate-2202, the third ejector plate-2203, the fourth ejector plate-2204, the first ejector pin-2301, the second ejector pin-2302, the bolt-24, the socket-25, the positioning groove-26, the positioning protrusion-27, the supporting portion-281, the supporting groove-282, the positioning post-28, the positioning hole-29 and the glue inlet-30.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.

Referring to fig. 1 to 28, a mold capable of being formed by two-shot injection in this embodiment sequentially includes, from top to bottom, a top plate 1, a female mold pressing plate 2, a female mold 3, a male mold 4, a male mold pressing plate 5, an ejection mechanism and a bottom plate 6, wherein a male mold glue position 401 is provided on one side of the male mold 4 near the female mold 3, a first insert 701 capable of being turned over is provided in the female mold 3, and a first female mold glue position 301 and a second female mold glue position 302 matched with the male mold glue position 401 are provided on two sides of the first insert 701. The first female mold glue site 301 corresponds to the male mold glue site 401 to form a first cavity containing a first injection molded product 1601, and the second female mold glue site 302 corresponds to the male mold glue site 401 to form a second cavity containing a second injection molded product 1602.

In this embodiment, four male mold glue sites 401 are formed on the male mold 4, and four first inserts 701 are correspondingly disposed in the female mold 3, so that four products can be produced simultaneously, as shown in fig. 4. First injection molding 1601 and second injection molding 1602 are shown in fig. 12-15, wherein second end 1604 of the product is further provided with a groove 18.

As shown in fig. 4-5, the insert body of the first insert 701 corresponds to a portion cut on a cylinder, and two planes parallel to each other are formed, on which the first master mold glue site 301 and the second master mold glue site 302 are respectively opened. After the first insert 701 is mounted on the master mold 3, two planes on the first insert 701 are flush with planes on the upper and lower sides of the master mold 3, and a cross section of the first insert 701 is similar to an ellipse.

As shown in fig. 10-11, the first insert 701 has round bars at two ends, including a first round bar 801 and a second round bar 802, the end of the first round bar 801 far away from the insert body is provided with a thread structure 803, the female die 3 is provided with a thread sleeve 804 matching with the thread structure 803, the thread structure 803 is installed in the thread sleeve 804, and the first insert 701 is rotatably connected to the female die 3 through the thread structure 803 and the thread sleeve 804. The end of the second round bar 802 remote from the insert body is provided with a notch 805.

As shown in fig. 16-19, a rotation mechanism for driving the first insert 701 to rotate is provided on the master mold 3, and the rotation mechanism includes a gear 9 mounted on the second round bar 802 and far from one end of the first round bar 801, a rack 10 matched with the gear 9, and a first driving device 1501 for driving the rack 10 to stretch out and draw back. The gear 9 is matched with the gap 805, and the gear 9 is driven to rotate by the rack 10. When the first insert 701 needs to be turned over, the first driving device 1501 drives the rack 10 to stretch and retract, and the gear 9 rotates, so as to drive the first insert 701 to rotate. For the sake of clarity, two of the four first inserts 701 are provided in the form of the first injection molding, and the remaining two first inserts 701 are provided in the form of the second injection molding.

As shown in fig. 19-20, in order to more accurately realize the overturning of the first insert 701, the first female mold glue position 301 or the second female mold glue position 302 is accurately abutted with the male mold glue position 401, in this embodiment, the first insert 701 is provided with a limiting member 11, and the female mold 3 is provided with a limiting hole 12 matched with the limiting member 11. Specifically, the stop 11 is mounted on the second round bar 802 between the insert body and the gear 9, as shown in fig. 16-17. The limiting member 11 is fitted to the notch 805. Through the cooperation of the limiting piece 11 and the limiting hole 12, the first insert 701 can accurately realize the overturning of a designated angle, namely the overturning of 180 degrees in the implementation.

As shown in fig. 19-20, the limiting member 11 includes a circular ring 1103 and an arc-shaped protrusion 1104 located at the periphery of the circular ring 1103, where the central angle corresponding to the arc-shaped protrusion 1104 is 90 °; the limiting hole 12 comprises an arc notch for the arc-shaped protrusion 1104 to rotate, and the central angle corresponding to the arc notch is 270 degrees. The arc-shaped protrusion 1104 has a first end surface 1101 and a second end surface 1102, and the arc-shaped notch has a third end surface 1201 and a fourth end surface 1202, wherein the third end surface 1201 is horizontally arranged and the fourth end surface 1202 is vertically arranged in this embodiment. When the first injection molding is performed, if the second end surface 1102 of the arc protrusion 1104 is in contact with the fourth end surface 1202 of the arc notch, after the first injection molding is completed, the first driving device 1501 drives the rack 10 to move, the gear 9 drives the first insert 701 to rotate, the arc protrusion 1104 rotates in the arc notch, the first end surface 1101 and the second end surface 1102 of the arc protrusion 1104 rotate 180 °, and then the second injection molding is performed, that is, when the second injection molding is performed, the first end surface 1101 of the arc protrusion 1104 is in contact with the third end surface 1201 of the arc notch. After the second injection molding is finished, the first driving device 1501 drives the rack 10 to move in the opposite direction, and when the second end surface 1102 of the arc-shaped protrusion 1104 contacts the fourth end surface 1202 of the arc-shaped notch, the first injection molding is repeated.

As shown in fig. 2 and 21-26, the male mold is further provided with a first moving plate 1401 for forming a first end 1603 of the injection molded product and a second moving plate 1402 for forming a second end 1604 of the injection molded product. In order to achieve the effect, the filling rod 13 is disposed on the first moving plate 1401 corresponding to the male mold glue position 401, and the filling rod 13 moves along with the first moving plate 1401. When the injection molding product is formed, the filling rod 14 is positioned in the cavity for accommodating the injection molding product, and when the product needs to be taken out, the second driving device 1502 drives the first moving plate 1401 to slide outwards, so that the filling rod 13 is driven to be separated from the cavity.

As shown in fig. 1, 4, 6 and fig. 21-26, the ejection mechanism comprises an ejector plate and a thimble arranged on the ejector plate, wherein the ejector plate comprises a first ejector plate 2201, a second ejector plate 2202, a third ejector plate 2203 and a fourth ejector plate 2204 from top to bottom in sequence; the ejector pins include first and second ejector pins 2301, 2302 extending through the male die platen 5 and the male die 4. The first ejector 2301 is used for ejecting the runner 17, and the second ejector 2302 is used for ejecting the product. The lower end of the first ejector pin 2301 is located between the first ejector plate 2201 and the second ejector plate 2202, and the lower end of the second ejector pin 2302 is located between the third ejector plate 2203 and the fourth ejector plate 2204. The first ejector pin 2301 penetrates the first ejector plate 2201 and the male mold 4, and the second ejector pin 2302 penetrates the first ejector plate 2201, the second ejector plate 2202, the third ejector plate 2203 and the male mold 4.

As shown in fig. 4 and 6, the bottom end of the ejector pin is provided with a supporting portion 281, and a supporting groove 282 for accommodating the supporting portion 281 is formed on one side of the ejector plate close to the supporting portion 281, and the size of the supporting groove 282 is matched with that of the supporting portion 281. In this embodiment, the first ejector plate 2201 and the third ejector plate 2203 are provided with supporting grooves 282, that is, the supporting portion 281 at the bottom of the first ejector pin 2301 is sandwiched by the first ejector plate 2201 and the second ejector plate 2202; the support portion 281 of the bottom of the second ejector pin 2302 is sandwiched by the third ejector plate 2203 and the fourth ejector plate 2204.

As shown in fig. 23-24, when second ejector plate 2202 moves upward, second ejector plate 2202 pushes first ejector pins 2301 and first ejector plate 2201 upward, ejecting runner 17; when the second ejector plate 2202 falls back, the first ejector plate 2201 also falls back downward, and the first ejector pins 2301 are urged to fall back by the supporting portions 281 of the ejector pins and the supporting grooves 282 of the first ejector plate 2201 being engaged with each other. As shown in fig. 25-26, when the fourth ejector plate 2204 moves upward, the fourth ejector plate 2204 pushes the second ejector pins 2302, the third ejector plates 2203, the second ejector plates 2202, the first ejector pins 2301 and the first ejector plates 2201 upward, so that the flow channels 17 and the product can be ejected simultaneously.

In this embodiment, first tie rods 1901 are provided on both sides of the master mold 3, and second tie rods 1902, which are matched with the first tie rods 1901, are provided on both sides of the second ejector plate 2202. One of the first pull rod 1901 and the second pull rod 1902 is provided with a sliding groove 20, and the other is provided with a sliding block 21 matched with the sliding groove 20. As shown in fig. 1 and 4, in this embodiment, a sliding groove 20 is formed on a first pull rod 1901, a sliding block 21 matched with the sliding groove 20 is disposed on a second pull rod 1902, and the second pull rod 1902 is inverted "L". When the female mold 3 moves upward, the first pull rod 1901 moves upward, the chute 20 moves upward, the slider 21 slides in the chute 20, and when the slider 21 slides to the bottommost end of the chute 20, the first pull rod 1901 drives the second pull rod 1902 to move upward, so that the second ejector plate 2202 moves upward, pushing the first ejector pin 2301 and the first ejector plate 2201 to move upward, and ejecting the runner 17.

As shown in fig. 1, in this embodiment, a positioning and locking device is provided on the outer side surfaces of the male mold 4 and the female mold 3, and includes a plug 24 provided on one of the outer side surfaces of the male mold 4 and the female mold 3 and a socket 25 provided on the other of the male mold 4 and the female mold 3 and matching the plug 24. In this embodiment, the male mold 4 is provided with the male pin 24 on the outer side surface thereof, the female mold 24 is provided with the corresponding female pin 25 on the outer side surface thereof, and the two male pins 24 and female pins 25 are provided on the remaining two outer side surfaces excluding the first tie rod 1901. As shown in fig. 27-28, the latch 24 is provided with an arcuate detent 26, and the socket 25 is provided with a detent projection 27 that mates with the arcuate detent 26. Through the mutual matching of the arc-shaped positioning groove 26 and the positioning protrusion 27, a certain effect is achieved on preventing accidental bouncing off and die closing positioning between the male die 4 and the female die 3.

One surface of the male die 4 and the female die 3, which are close to each other, is provided with a positioning column 28, and the other surface is provided with a positioning hole 29 matched with the positioning column 28. As shown in fig. 2 and 8, in this embodiment, a positioning post 28 is selectively provided on the female mold 3, and a positioning hole 29 is correspondingly provided on the male mold 4.

The first driving device 1501, the second driving device 1502 and the third driving device 1503 may be identical or different, and may be selected from a cylinder, an oil cylinder and the like.

Since the second end 1604 end of the injection molded product in this embodiment has a groove 18, a second insert 702 for preparing the groove 18 is also provided in the male mold 4, as shown in fig. 6-7. When injection molding is desired, the top of the second insert 702 is positioned in the male mold compound 401. An elastic piece is arranged between the male die 4 and the male die pressing plate 5, and the elastic piece plays a role in bouncing the male die 4 and the male die pressing plate 5 when the male die 4 is separated from the male die pressing plate 5; when the male mold 4 is engaged with the male mold platen 5, the second insert 702 is urged upward into the male mold glue station 401. When the male die 4 is separated from the male die pressing plate 5, the second insert 702 falls back, and the second insert 702 is separated from the male die glue position 401 or the product, so that the injection molding product is conveniently taken out. The elastic member is preferably a spring.

The working procedure of the mold capable of being secondarily molded in this embodiment is briefly described below:

before the first injection molding is performed, the female mold pressing plate 2 is tightly attached to the female mold 3, the male mold pressing plate 5 is tightly attached to the male mold 4, the first moving plate 1401 and the second moving plate 1402 are tightly attached to the male mold glue position 401, a first cavity for accommodating the first injection molding product 1601 is formed by the first female mold glue position 301 of the female mold 3 corresponding to the male mold glue position 401, the filling rod 13 is located in the first cavity, and the top of the second insert 702 is located at the second end 1604 of the first cavity, as shown in fig. 6-7.

Next, the first injection molding is performed, and a flowing polymer material or a metal material is injected into the first cavity, and cooled to form a first injection molded product 1601.

After the first injection molding is completed, the female mold 3 is moved upward, and the male mold 4 and the female mold 3 are separated from each other. When the female mold 3 moves upward, the first pull rod 1901 is driven to move upward, and when the slider 21 of the second pull rod 1902 slides to the bottom of the first pull rod 1901, the first pull rod 1901 pulls the second pull rod 1902 upward, and further drives the second ejector plate 2202 to move upward, so as to push the first ejector pin 2301 and the first ejector plate 2201 upward, thereby ejecting the runner 17, as shown in fig. 23-24. At this time, the first moving plate 1401 and the second moving plate 1402 on the male mold 4 are not moved, the filling rod 13 remains in the first injection molding product 1601, the third ejector plate 2203 and the fourth ejector plate 2204 are not moved, the second ejector pins 2302 do not perform the ejection operation, and the first injection molding product 1601 remains in the male mold glue position 401.

Then the female die pressing plate 2 and the female die 3 are sprung out by 4.0mm, the first driving device 1501 drives the rack 10 to move, the first insert 701 is driven to rotate through the rotation of the gear 9, and after the first insert is precisely rotated by 180 degrees through the limiting device, the female die pressing plate 2 is attached to the female die 3 again, the male die 4 and the female die 3 are clamped, the positions of the first female die glue position 301 and the second female die glue position 302 are mutually exchanged, and the second female die glue position 302 and the male die glue position 401 are correspondingly formed into a second cavity for accommodating the second injection molding product 1602.

And then performing secondary injection molding, injecting flowing polymer material or metal material into the second cavity, and cooling to form a secondary injection molded product 1602. The second shot product 1602 is formed on the basis of the first shot product 1601. The portion adjacent to the male mold glue site 401 is unchanged, and only on the side adjacent to the female mold 3, the final injection product is changed by replacing the first female mold glue site 301 with the second female mold glue site 302.

As shown in fig. 25 to 26, after the second injection molding is completed, the female mold 3 is moved upward, and the male mold 4 and the female mold 3 are separated from each other. The first moving plate 1401 and the second moving plate 1402 on two sides of the male mold 4 are respectively driven by the second driving device 1502 and the third driving device 1503 to slide out towards two sides, wherein the first moving plate 1401 drives the filling rod 13 to separate from the second injection molding product 1602. Meanwhile, the male mold pressing plate 5 and the male mold 4 are separated from each other by 8.0mm, so that the elastic member falls back, and the second insert 702 and the second injection molding product 1602 are separated from each other to facilitate the removal of the product.

As shown in fig. 25, when the female mold 3 moves upward, the first pull rod 1901 is driven to move upward, and the slider 21 of the second pull rod 1902 slides to the bottom of the first pull rod 1901, the first pull rod 1901 pulls the second pull rod 1902 upward, so as to drive the second ejector plate 2202 to move upward, and push the first ejector pin 2301 and the first ejector plate 2201 to move upward, thereby ejecting the runner 17. At the same time as first ejector pin 2301 moves upward, fourth ejector plate 2204 also moves upward, pushing second ejector pin 2302 and third ejector plate 2203 upward, thereby ejecting second injection product 1602. I.e., through first and second pins 2301 and 2302, to ultimately simultaneously eject runner 17 and second injection molding product 1602. The second shot product 1602 is then removed from the mold.

At this time, the injection molding product is completed, and one cycle is ended. Then, the female mold pressing plate 2 and the female mold 3 are separated from each other by 4.0mm, the first insert 701 in the female mold 3 is turned over by the driving of the rotating mechanism, and after the female mold pressing plate 2 is precisely rotated 180 degrees by the limiting device, the male mold 4 and the female mold 3 are closed, a first cavity is formed between the male mold 4 and the female mold 3, and then the first injection molding of the next cycle is performed.

The male mold 4 in this embodiment has only one type of male mold glue site 401, and in other embodiments, the male mold 4 may be configured in a similar manner to the first insert 701 in the female mold 3 to produce different types of products.

The mold capable of being formed by secondary injection molding is reasonable in structural design, and the reversible inserts are arranged in one set of mold, so that two different cavities are formed in the mold, the inserts are controlled to turn after primary injection molding, and then secondary injection is performed, so that a final product is obtained, the mold does not need to be replaced, the service life of the mold is prolonged, manpower and material resources are saved, the production time is shortened, the production efficiency is improved, the production cost is reduced, the benefit is improved, and the mold has good application and popularization prospects.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a mould that can two shot forming which characterized in that: the mold comprises a female mold pressing plate, a female mold, a male mold pressing plate and an ejection mechanism from top to bottom in sequence, wherein a male mold glue position is formed on one side, close to the female mold, of the male mold, a first insert capable of overturning is arranged in the female mold, and a first female mold glue position and a second female mold glue position matched with the male mold glue position are respectively formed on two sides of the first insert;

the female die is provided with a rotating mechanism for driving the first insert to rotate, and the rotating mechanism comprises a gear positioned at one end of the first insert, a rack matched with the gear and a first driving device for driving the rack to stretch out and draw back; the two ends of the first insert are provided with a first round rod and a second round rod, the end part of the first round rod, which is far away from the second round rod, is provided with a thread structure, and a thread sleeve matched with the thread structure is arranged on the female die;

the insert body of the first insert is formed by cutting a part of a cylinder to form two parallel planes, and the two planes are respectively provided with the first master mold glue position and the second master mold glue position; after the first insert is arranged on the female die, two planes on the first insert are flush with the planes on the upper side and the lower side of the female die.

2. The two-shot molding die according to claim 1, wherein: the first insert is provided with a limiting part, and the female die is provided with a limiting hole matched with the limiting part.

3. The two-shot molding die according to claim 2, wherein: the limiting piece comprises a circular ring and an arc-shaped bulge positioned at the periphery of the circular ring; the limiting hole comprises an arc notch for the arc-shaped protrusion to rotate.

4. A two-shot mold according to claim 3, wherein: the circumferential angle corresponding to the arc-shaped bulge is 90 degrees, and the circumferential angle corresponding to the arc-shaped notch is 270 degrees.

5. The two-shot molding die according to claim 1, wherein: the male die is characterized in that a filling rod is arranged in the male die glue position, and a first moving plate for driving the filling rod to move is further arranged on the male die.

6. The two-shot molding die according to claim 1, wherein: and the male die is also provided with a second insert which can enter and exit the rubber position of the male die.

7. A two-shot mold according to any one of claims 1 to 6, wherein: the male die and the female die are provided with positioning and locking devices on the outer side surfaces, and each positioning and locking device comprises a bolt arranged on one outer side surface of the male die and one outer side surface of the female die and a socket which is arranged on the other outer side surface of the male die and the female die and matched with the bolt.

8. The two-shot molding die according to claim 1, wherein: one surface of the male die and one surface of the female die, which are close to each other, are provided with positioning columns, and the other surface of the male die and the other surface of the female die, which are close to each other, are provided with positioning holes matched with the positioning columns.