CN112476983B

CN112476983B - Lens shell shedder

Info

Publication number: CN112476983B
Application number: CN202011111850.0A
Authority: CN
Inventors: 毛永春
Original assignee: Bellon Precision Technology Co ltd
Current assignee: Bellon Precision Technology Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2022-05-27
Anticipated expiration: 2040-10-16
Also published as: CN112476983A

Abstract

The invention discloses a lens shell demoulding device, which belongs to the field of moulding and manufacturing, and comprises a mould and a demoulding tool, wherein the mould comprises a runner plate, a front mould core push plate and a rear mould core, the runner plate is used for moulding a lens shell, the front mould core push plate is positioned between the runner plate and the rear mould core, front mould inserts are arranged in the rear mould core and the front mould core push plate, the front mould inserts are fixedly connected with the runner plate, the lens shell is positioned between the front mould inserts and the rear mould core, and when demoulding is carried out, the lens shell is pushed by the front mould core push plate to complete demoulding, so that the problem that in the prior art, demoulding and carrying are carried out in a clamping mode, so that the outer part of the lens shell is easily abraded or scratched is solved.

Description

Lens shell shedder

Technical Field

The invention relates to an auxiliary structure in the manufacturing industry, in particular to a lens shell demoulding device.

Background

For the injection-molded shell part, the shell part needs to be separated from the mold after molding, and a common demolding structure mainly uses a suction disc and a clamping jaw to realize the separation of the mold and the shell, and the suction disc or the clamping jaw cannot avoid generating an indentation on the surface of the shell due to the compression with the shell if enough force is provided for the separation; for some appearance pieces with higher appearance requirements, the surface is indented, which means scrapping; for example, when a lens housing of a vehicle-mounted camera is demolded, a clamping jaw is used to grab the housing and then the housing is lifted to complete demolding, so that the surface of the lens housing is easily abraded or indented by the clamping jaw, the appearance detection is unqualified, and the rejection rate is increased.

For example, the "new demolding device" disclosed in the chinese patent document, which is under the publication number CN209920474U and includes upper and lower clamping jaw modules, has the disadvantage that the demolding is performed by means of clamping jaws, which is prone to generate indentation or abrasion on the surface of the product, thereby increasing the rejection rate.

Disclosure of Invention

The invention provides a lens shell demoulding device, which aims to solve the problem that in the prior art, when a product is demoulded, the product needs to be taken down from a mould through a clamping jaw, and abrasion or scratch is easily formed on the outer part of the product, so that the appearance of the product is influenced.

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

the invention discloses a lens shell demoulding device which comprises a mould and a demoulding tool, wherein the mould comprises a runner plate, a front mould core push plate and a rear mould core, the runner plate is used for forming a lens shell, the front mould core push plate is positioned between the runner plate and the rear mould core, front mould inserts are arranged in the rear mould core and the front mould core push plate, the front mould inserts are fixedly connected with the runner plate, the lens shell is positioned between the front mould inserts and the rear mould core, the demoulding tool is provided with a clamping block at one end facing the mould, and one side of the front mould inserts facing the demoulding tool is provided with a clamping block groove matched with the clamping block.

When the device is used for demoulding, the lens shell does not need to be taken down by grabbing, but is pushed out outwards by the front mould core push plate, and in the demoulding process, the demoulding tool can extend into the lens shell through the connection of the clamping block and the clamping block groove, so that the lens shell taken off from the front mould insert falls on the demoulding tool, and the demoulding tool is in contact with the inner side of the lens shell, and abrasion or scratch cannot be formed outside the lens shell.

Preferably, a rear mold insert groove is formed in the rear mold core and on one side back to the front mold core push plate, a rear mold insert is installed in the rear mold insert groove in an adaptive mode, and one end of the rear mold insert is inserted into one opening of the lens shell in an adaptive mode; because the front mold core and the rear mold core are in close contact with the lens shell before demolding, a vacuum cavity is easily generated between the rear mold core and the lens shell in the demolding process, so that the rear mold core is prevented from being taken out; in the scheme, the rear mold insert can be taken out firstly, and after the rear mold insert is taken out, one end of the lens shell, which is originally connected with the rear mold insert, is communicated with the outside air, so that the air can quickly enter a gap between the lens shell and the rear mold core in the taking-out process of the rear mold core, a vacuum cavity is prevented from being formed, and the rear mold core can be taken out more smoothly.

Preferably, the demolding tool comprises a fixed frame and a movable core positioned in the fixed frame, a fixed baffle ring and a movable baffle ring are arranged on the outer side of the fixed frame, the movable baffle ring is fixedly connected with the movable core, the fixed baffle ring is fixedly connected with the fixed frame, and an elastic sleeve is arranged between the movable baffle ring and the fixed baffle ring; the lens shell falls onto the demolding tool after being separated from the front mold insert, the elastic sleeve on the demolding tool can reduce abrasion or impact generated when the elastic sleeve is in contact with the lens shell, the elastic sleeve can be enabled to bulge outwards by moving the movable core in the demolding tool so as to be propped against the inner side of the lens shell, the lens shell is fixed on the demolding tool, the lens shell can be conveyed by moving the demolding tool, and in the process, the outer part of the lens shell cannot be in contact with other objects or parts, so that abrasion or scratches of the lens shell are avoided.

Preferably, the clamping block is rotationally connected with the movable core, and a torsion spring is arranged between the clamping block and the movable core; when the clamping block is positioned in the clamping block groove, the clamping block cannot rotate due to the limitation of the clamping block groove, and the torsion spring can be screwed down by rotating the movable core, so that the extrusion force between the clamping block and the clamping block groove is increased, and the front mold insert and the demolding tool are connected together.

Preferably, the movable baffle ring is connected with the movable core through a connecting rib, a radial connecting rib moving groove is formed in the fixed frame, and an axial connecting piece rotating groove is connected to one end, facing the clamping block, of the connecting rib moving groove; the distance of relative movement of the fixed frame and the movable core can be limited through the connecting rib moving groove, so that the extrusion degree of the elastic sleeve is controlled, and the elastic sleeve can be just propped against the inside of the lens shell after being extruded; when the elastic sleeve is extruded to required degree, the movable rib moves to the connecting rib rotating groove, then under the action of the torsional spring, the movable core can rotate along the direction of the connecting rib rotating groove, so that the torsional spring is reset, after the torsional spring is reset, the extrusion force between the fixture block and the fixture block groove is lost, the front mold insert and the demolding tool can be separated, and meanwhile, the connecting rib completely enters the connecting rib rotating groove, so that the distance between the movable retaining ring and the fixed retaining ring is fixed, and the elastic sleeve is kept in a bulged state.

Preferably, the elastic sleeve is made of silica gel, the silica gel has good elasticity, is easy to extrude, has low cost and convenient replacement, and is suitable for being used as the material of the elastic sleeve.

Preferably, an elastic layer is arranged outside the fixture block, and the elastic layer can improve the extrusion force between the fixture block and the fixture block groove, so that the connection reliability of the front mold insert and the demolding tool is improved.

Therefore, the invention has the following beneficial effects: (1) when the lens shell is demoulded, the lens shell cannot be touched to the outside of the lens shell, so that abrasion or scratch is avoided; (2) the taken-down lens shell is convenient to transfer and carry; (3) the device has simple integral structure and lower cost.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention prior to demolding.

FIG. 2 is a schematic view of a first embodiment of the present invention during demolding.

Fig. 3 is a schematic view of a second construction of the present invention during demolding.

Fig. 4 is a schematic structural view of the demolding tool after the elastic sleeve is hidden.

In the figure: 1. the mold comprises a mold 2, a demolding tool 3, a lens shell 4, a runner plate 5, a front mold core push plate 6, a rear mold core 7, a front mold insert 8, a rear mold insert 9, a fixture block 10, a fixture block groove 11, a fixing frame 12, a movable core 13, a fixed baffle ring 14, a fixed sleeve 15, a base 16, a movable baffle ring 17, a connecting rib moving groove 18, an elastic sleeve 19, a connecting rib rotating groove 20 and a torsion spring.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

In the embodiment shown in fig. 1-4, a lens housing demolding device comprises a mold 1 for molding a lens housing 3 and a demolding tool 2 for demolding and moving the lens housing; the lens shell is a shell of the vehicle-mounted camera, the appearance of the lens shell cannot be abraded or scratched according to production requirements, the shape of the shell is similar to a thin-wall cylinder and comprises two openings, the two openings are different in size, the mould comprises a runner plate 4 for forming a lens shell, a front mould core push plate 5 and a rear mould core 6, the front mold core push plate is positioned between the runner plate and the rear mold core, one side of the front mold core push plate is contacted with a larger opening of the lens shell, a front mold insert 7 is arranged in the rear mold core and the front mold core push plate, the front mold insert is fixedly connected with the runner plate, the lens shell is positioned between the front mold insert and the rear mold core, a rear mold insert groove is arranged in the rear mold core and at one side back to the front mold core push plate, a rear mold insert 8 is installed in the rear mold insert groove in an adaptive manner, and one end of the rear mold insert is inserted into one opening of the lens shell in an adaptive manner; a fixture block 9 is arranged at one end of the demolding tool facing the mold, an elastic layer is arranged on the fixture block, and a fixture block groove 10 matched with the fixture block is formed in one side of the front mold insert facing the demolding tool; the opening shape in fixture groove is the rectangle, the drawing of patterns frock includes mount 11 and removal core 12, the mount includes consecutive fixed fender ring 13, fixed cover 14 and base 15, it passes to remove the core fixed fender ring and fixed cover, the external diameter size of fixed cover is less than the external diameter of fixed fender ring and base, the outside of fixed cover is equipped with removes fender ring 16, be equipped with radial joint bar shifting chute 17 on the fixed cover, it is connected with removing the core through the joint bar to remove fender ring, the joint bar passes joint bar shifting chute, it installs elastic sleeve 18 to remove fender ring and fixed fender ring between, the length in joint bar shifting chute is half of fixed cover length, joint bar shifting chute orientation fixed fender ring's one end department is connected with joint bar rotation groove 19, the direction in joint bar rotation groove is the circumference of fixed cover, the connecting rib rotating groove is positioned in the middle of the fixed sleeve; the fixture block is rotatably connected with the movable core, and a torsion spring 20 is arranged between the fixture block and the movable core.

The demolding process by using the device comprises the following steps: the rear mold insert is taken out of the rear mold core, after the rear mold insert is taken out, one end of the lens shell, which is originally connected with the rear mold insert, is communicated with the outside air, and then the rear mold core is taken out, at the moment, the air can quickly enter a gap between the lens shell and the rear mold core, so that a vacuum cavity is prevented from being formed, and the rear mold core is taken out more smoothly; after the rear mold core is taken out, a clamping block of the demolding tool extends into the clamping block groove, the base is rotated, the connecting rib is located in the connecting rib moving groove at the moment, the moving core and the fixing frame cannot rotate relatively, so that the moving core rotates along with the fixing frame, the clamping block cannot rotate due to the limitation of the clamping block groove, the torsion spring is compressed, the compressed torsion spring provides elasticity for the clamping block, the clamping block is clamped in the clamping block groove, and the demolding tool and the front mold insert are relatively fixed in the radial direction; then, moving the front mold core push plate to preliminarily separate the lens shell from the front mold insert, wherein in the preliminary separation process, as shown in fig. 2, one opening of the lens shell moves to the outer side of the elastic sleeve; then moving the demolding tool back to the front mold insert, wherein in the moving process, as the fixture block is clamped in the fixture block groove, the fixed frame and the moving core firstly move relatively, and meanwhile, the elastic sleeve is extruded, so that the elastic sleeve bulges outwards and is propped against the inner side of the lens shell, and the lens shell is fixed on the demolding tool; when the connecting ribs are located at the connecting rib rotating grooves, the fixing frame and the moving core relatively rotate under the action of the elastic force of the torsion spring, the torsion spring is restored, after the torsion spring is restored, the extrusion force between the fixture block and the fixture block groove is reduced, the demolding tool continues to move at the moment, the fixture block is withdrawn from the fixture block groove, the lens shell and the mold are completely separated, and the lens shell is fixed on the demolding tool, so that the lens shell is convenient to carry.

In the demolding and carrying processes of the lens shell, the lens shell cannot be contacted with the outer surface of the lens shell, so that abrasion and scratch are avoided, the lens shell is flexibly contacted with the inner side of the lens shell, and the inner side size structure is prevented from being damaged; and the work flow is simple, the work flow can be completed only by moving and rotating the components, and the automatic production device is suitable for automatic production.

Claims

1. A lens shell demoulding device is characterized by comprising a mould and a demoulding tool, wherein the mould comprises a runner plate, a front mould core push plate and a rear mould core, the runner plate is used for forming a lens shell, the front mould core push plate is positioned between the runner plate and the rear mould core, a front mould insert is arranged in the rear mould core and the front mould core push plate, the front mould insert is fixedly connected with the runner plate, the lens shell is positioned between the front mould insert and the rear mould core, a clamping block is arranged at one end of the demoulding tool facing the mould, and a clamping block groove matched with the clamping block is arranged at one side of the front mould insert facing the demoulding tool; the drawing of patterns frock includes the mount and is located removal core in the mount, the outside of mount is equipped with removes and keeps off the ring, remove keep off the ring with remove core fixed connection, the mount still includes fixed fender ring, remove and keep off and install the elastic sleeve between the ring with fixed fender.

2. The lens housing demolding device as claimed in claim 1, wherein a rear mold insert groove is formed in the rear mold core at a side facing away from the front mold core pushing plate, a rear mold insert is fittingly installed in the rear mold insert groove, and one end of the rear mold insert is fittingly inserted into an opening of the lens housing.

3. The lens housing de-molding apparatus as claimed in claim 1, wherein said fixture block is rotatably connected to said movable core, and a torsion spring is installed between said fixture block and said movable core.

4. The lens housing release device according to claim 3, wherein the movable stopper is connected to the movable core by a connecting rib, and the holder is provided with a radial connecting rib moving groove connected to an axial connecting member rotating groove at an end facing the fixture block.

5. The lens housing demolding device as claimed in claim 4, wherein the elastic sleeve is made of silicone.

6. The lens housing demolding device as claimed in claim 1, wherein an elastic layer is provided on an outer portion of the fixture block.