CN210308891U

CN210308891U - Back-off core-pulling injection mold

Info

Publication number: CN210308891U
Application number: CN201920875498.4U
Authority: CN
Inventors: 石鑫; 王斌
Original assignee: Shanghai Ruishuo Precision Molding Technology Co ltd
Current assignee: Shanghai Ruishuo Precision Molding Technology Co ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-04-14
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a back-off core-pulling injection mold, which relates to the technical field of molds and mainly aims to solve the problem that the mold of the traditional back-off structure has back-off damage and the product yield is low; this injection mold, including preceding membrane module and back membrane module, preceding membrane module includes front mould A board and front mould panel, install front mould benevolence and take-up housing in the front mould A board, back membrane module includes back mould B board, back mould heat insulating board and back mould bottom plate, back mould B board internally mounted have behind the compound die with take-up housing matched with shovel base, the inside front mould benevolence that is provided with of front mould A board and inlays needle A, activity inserts and inlay needle B with front mould benevolence die cavity face matched with, inlay needle A and inlay needle B and be connected through activity inserts, the outside of front mould A board is provided with the hydro-cylinder, and the hydro-cylinder tip passes the take-up housing and is connected with inlaying needle B, the inboard injection moulding product that is through the face structure that has of putting of back mould benevolence and front mould benevolence die cavity.

Description

Back-off core-pulling injection mold

Technical Field

The utility model relates to the technical field of mold, specifically a back-off injection mold of loosing core.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a process used to mass produce parts of some complex shapes. Specifically, the plastic melted by heating is injected into a mold cavity from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification.

In the design of an injection mold, a portion of a product that interferes with the mold opening direction is called back-off. If the product is inverted, the product cannot be designed in a common demoulding way. Accordingly, there is a corresponding back-off handling system in making such mold designs. The conventional back-off processing method is that a fixed die push plate follows, and the implementation modes comprise a button machine implementation mode, a spring implementation mode and the like. In addition, the movement processes of the modes have inverted buckle and injury of different degrees on products, the product yield is low, and the cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a back-off injection mold of loosing core to the mould of solving traditional back-off structure has the back-off to take off and hinders and the low problem of product qualification rate.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an injection mold of loosing core of back-off, includes front mould subassembly and back mould subassembly, front mould subassembly includes front mould A board and front mould panel, install front mould benevolence and take-up housing in the front mould A board, back mould subassembly includes back mould B board, back mould heat insulating board and back mould bottom plate, back mould B inboard internally mounted has behind the compound die with take-up housing matched with shovel base, front mould A inboard inside is provided with the merciful and peaceful and inlay needle A, activity inserts and inlay needle B with front mould benevolence die cavity surface matched with, inlays needle A and inlays needle B and be connected through movable inserts, the outside of front mould A board is provided with the hydro-cylinder, and the flat bit architecture of piston rod of hydro-cylinder is connected with inlay needle B with the take-up housing, back mould benevolence and front mould benevolence die cavity built-in have be the injection moulding product who link.

On the basis of the technical scheme, the utility model discloses still provide following optional technical scheme:

in one alternative: and the rear mould heat insulation plate and the rear mould bottom plate are fixed through screws.

In one alternative: the distance between the oil cylinder and the joint surface of the sliding block seat is 0.5 mm.

In one alternative: the shovel base in the front die assembly is matched with the sliding block seat of the rear die assembly through an inclined plane.

In one alternative: and an ejector pin bottom plate and an ejector pin panel are arranged between the rear mold heat insulation plate and the rear mold B plate, and square irons are fixed on two sides of the ejector pin panel.

In one alternative: the thimble panel is provided with a thimble, a support column and a return rod spring which is encircled on the support column.

In one alternative: the rear die B plate is further provided with a guide sleeve and a guide pillar, the front die A plate is provided with a sprue bushing, a positioning ring is fixed at the center of the front die panel, and the front die A plate is further provided with a front die heat insulation plate.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the invention avoids the damage caused by the back-off, adopts the form of one-side slide block core pulling and one-side integral insert, has compact product structure, has very limited movable space of the inner insert and can only be taken off by rotation;

2. the product is placed on a specific tool after being taken out along with the inner insert, the insert is taken out quickly, the mold is convenient and quick to use, the structural design of the mold is novel, the product is not damaged by pulling during demolding, the qualification rate is high, and the problem of mold opening of the product with a compact inverted buckle structure is effectively solved.

Drawings

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

Fig. 2 is a schematic structural diagram of the middle section of the present invention.

Fig. 3 is a schematic structural diagram of the middle and rear module B plate of the present invention.

Fig. 4 is a schematic structural view of the middle front mold a plate of the present invention.

Fig. 5 is the structure schematic diagram of the product and the mold insert a before the rotation.

Fig. 6 is the structure diagram of the middle rotary rear product and the mold insert a of the present invention.

Notations for reference numerals: the mould comprises a rear mould heat insulation plate 1, an ejector pin base plate 2, an ejector pin panel 3, a rear mould base plate 4, square iron 5, a reset rod spring 6, an ejector pin 7, a rear mould B plate 8, a front mould A plate 9, a front mould panel 10, a front mould heat insulation plate 11, a positioning ring 12, a guide sleeve 13, a guide pillar 14, an oil cylinder 15, a slider seat 16, a shovel base 17, a rear mould core 18, a front mould core 19, a sprue bushing 20, an insert pin A21, a movable insert 22 and an insert pin B23.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the drawings or description, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practical applications. The embodiments of the present invention are provided only for illustration, and not for limiting the scope of the present invention. Any obvious and obvious modifications or alterations to the present invention can be made without departing from the spirit and scope of the present invention.

Example 1

Referring to fig. 1 to 6, in an embodiment of the present invention, an inverted core-pulling injection mold includes a front mold assembly and a rear mold assembly, the front mold assembly includes a front mold a plate 9 and a front mold panel 10, a front mold core 19 and a slide block seat 16 are installed in the front mold a plate 9, the rear mold assembly includes a rear mold B plate 8, a rear mold core 18, a rear mold heat insulation plate 1 and a rear mold bottom plate 4, the rear mold heat insulation plate 1 and the rear mold bottom plate 4 are fixed by screws, a shovel base 17 matched with the slide block seat 16 after mold closing is installed in the rear mold B plate 8, a front mold core 19 and an insert pin a21, a movable insert 22 and an insert pin B23 matched with a cavity surface of the front mold core 19 are installed in the front mold a plate 9, the insert pin a21 is connected with the insert pin B23 by the movable insert 22, an oil cylinder 15 is installed outside the front mold a plate 9, and a piston rod flat structure of the oil cylinder 15 is connected with the slide block seat 16 and the insert pin B23, injection products with through surface structures are arranged in the cavities of the rear die core 18 and the front die core 19, the insert pin A21 is inserted into the inner side of the injection products through the side wall, and the distance between the joint surfaces of the oil cylinder 15 and the slide block seat 16 is 0.5 mm;

the shovel base 17 in the front die assembly is matched with the sliding block seat 16 of the rear die assembly through an inclined plane;

before mold closing, an insert pin A21, a movable insert 22 and an insert pin B23 are integrally assembled on a slider seat, then an oil cylinder 15 is pushed to the maximum limit position, a gap of 0.5mm is reserved between the insert pin A21 and the cavity surface of a front mold core 19, and the structure of the product is a through surface, so that the product is required to be completely closed, the mold needs to perform a second action, in the mold closing process of the front mold assembly and a rear mold assembly, a shovel base 17 in the front mold assembly is matched with the slider seat 16 of the rear mold assembly through an inclined surface, and the slider seat 16 of the block seat continues to advance by 0.5mm after mold closing, so that the insert pin is completely attached to the cavity surface of the front mold core 19; after the mold is opened, the oil cylinder retreats to drive the sliding block seat, the insert B and the movable insert 22 to retreat together; therefore, the insert B can be firstly pulled out of the product, the insert A firstly begins to retreat by 10mm from the front mould panel, interference with the inner side surface of the product is found, and demoulding cannot be smoothly carried out, so that the insert A needs to be firstly rotated to a certain angle, then the insert A can be used on the right side edge, and the injection product is completely separated from the side hole by applying a thrust force from the side hole.

Example 2

The embodiment of the utility model provides a difference with embodiment 1 lies in: an ejector pin bottom plate 2 and an ejector pin panel 3 are arranged between the rear mold heat insulation plate 1 and a rear mold B plate 8, square irons 5 are fixed on two sides of the ejector pin panel 3, an ejector pin 7, a support column and a reset rod spring 6 surrounding the support column are assembled on the ejector pin panel 3, and the ejector pin panel 3 is used for installing the ejector pin 7 and providing an ejection movement stroke when a product is ejected by opening a mold; in the ejection action process, the return rod spring 6 is compressed, the ejector pin 7 is ejected, the return spring returns after the action is finished, and the ejector pin retreats; the supporting column can increase the strength of the whole structure of the die and is connected with the rear die bottom plate 4 and the rear die B plate 8, and the two square irons 5 are fixed on the rear die bottom plate 4 and mainly play a role in supporting;

the rear mould B plate 8 is further provided with a guide sleeve 13 and a guide post 14, the front mould A plate 9 is provided with a sprue bushing 20, the center position of the front mould panel 10 is fixed with a positioning ring 12, the guide post 14 slides in the guide sleeve 13 in the mould opening and mould closing process, the guiding and accurate mould closing positioning effects can be achieved, in the injection molding process, the positioning ring 12 plays a role in positioning the nozzle of the injection molding machine, molten plastic is injected into a mould cavity through the sprue bushing 20, and the front mould A plate 9 is further provided with a front mould insulation board 11.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. An inverted core-pulling injection mold comprises a front mold component and a rear mold component, wherein the front mold component comprises a front mold A plate (9) and a front mold panel (10), and is characterized in that a front mold core (19) and a slide block seat (16) are installed in the front mold A plate (9), the rear mold component comprises a rear mold B plate (8), a rear mold core (18), a rear mold heat insulation plate (1) and a rear mold bottom plate (4), a shovel base (17) matched with the slide block seat (16) after mold closing is installed in the rear mold B plate (8), a front mold core (19) and an embedding needle A (21), a movable embedding piece (22) and an embedding needle B (23) matched with a cavity surface of the front mold core (19) are arranged in the front mold A plate (9), the embedding needle A (21) is connected with the embedding needle B (23) through the movable embedding piece (22), and an oil cylinder (15) is arranged on the outer side of the front mold A plate (9), the flat position structure of a piston rod of the oil cylinder (15) is connected with the sliding block seat (16) and the insert pin B (23), and injection molding products with through surface structures are arranged in cavities of the rear mold core (18) and the front mold core (19).

2. The inverted core pulling injection mold according to claim 1, wherein the rear mold heat insulation plate (1) and the rear mold base plate (4) are fixed by screws.

3. The inverted buckle core-pulling injection mold according to claim 1, wherein the distance between the engagement surface of the oil cylinder (15) and the slider seat (16) is 0.5 mm.

4. The inverted core pulling injection mold according to claim 1, wherein the shovel base (17) of the front mold assembly and the slider seat (16) of the rear mold assembly are engaged by an inclined surface.

5. The inverted buckling core pulling injection mold according to claim 1, wherein an ejector pin base plate (2) and an ejector pin panel (3) are installed between the rear mold heat insulation plate (1) and the rear mold B plate (8), and square irons (5) are fixed to two sides of the ejector pin panel (3).

6. The inverted buckle core-pulling injection mold according to claim 5, wherein the ejector pin panel (3) is provided with an ejector pin (7), a support column and a return rod spring (6) surrounding the support column.

7. The inverted buckle core pulling injection mold according to claim 6, wherein the rear mold B plate (8) is further provided with a guide sleeve (13) and a guide post (14), the front mold A plate (9) is provided with a sprue bushing (20), the center of the front mold surface plate (10) is fixed with a positioning ring (12), and the front mold A plate (9) is further provided with a front mold heat insulation plate (11).