CN112356406B

CN112356406B - Outward appearance piece demoulding structure

Info

Publication number: CN112356406B
Application number: CN202010996354.1A
Authority: CN
Inventors: 毛永春
Original assignee: Bellon Precision Technology Co ltd
Current assignee: Bellon Precision Technology Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2022-05-27
Anticipated expiration: 2040-09-21
Also published as: CN112356406A

Abstract

The invention discloses an appearance piece demoulding structure, belonging to the field of manufacturing industry, comprising an appearance piece with a hollow structure, a lower mould for forming the appearance piece and a demoulding component for demoulding the appearance piece from the lower mould, the demoulding assembly is characterized by comprising a demoulding rod which can extend into the interior of an appearance piece, an elastic sleeve is sleeved on the demoulding rod, an extrusion block for extruding the elastic sleeve is further installed on the demoulding rod, after the elastic sleeve extends into the interior of the appearance piece, the elastic sleeve is extruded by the extrusion block, the elastic sleeve can be enabled to bulge outwards to be squeezed with the inner part of the appearance piece, and after the demoulding rod is retracted, can take off outward appearance piece from the mould, can not touch the lateral surface of outward appearance piece, solve prior art at outward appearance piece drawing of patterns in-process, its surface produces the problem of wearing and tearing or indentation easily.

Description

Outward appearance piece demoulding structure

Technical Field

The invention relates to an auxiliary structure in the manufacturing industry, in particular to an appearance piece demoulding structure.

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 an appearance piece demoulding structure, 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 an appearance piece demoulding structure which comprises an appearance piece with a hollow structure, a lower mould used for forming the appearance piece and a demoulding component used for demoulding the appearance piece from the lower mould.

The demolding rod can extend downwards and enable the elastic sleeve to be located inside the appearance piece, the outer diameter of the elastic sleeve is slightly smaller than the inner diameter of the appearance piece at the position after the elastic sleeve is located inside the appearance piece, the elastic sleeve can be enabled to bulge outwards after being extruded by the extrusion block, the outer diameter of the bulged elastic sleeve is increased and is extruded with the inside of the appearance piece, at the moment, the appearance piece can be taken off from the mold after the demolding rod is retracted, no structure touches the outer side of the appearance piece in the demolding process, and therefore the outer side of the appearance piece cannot be abraded or indented; in addition, when outward appearance piece opening size is less, structures such as general gas claw can't stretch into wherein, and in this scheme only need correspondingly reduce the external diameter of elastic sleeve and telescopic link can.

Preferably, the demoulding rod is provided with a limiting head, and the elastic sleeve is positioned between the extrusion block and the limiting head; when the extrusion block extrudes one side of the elastic sleeve, the limiting head can limit the other side of the elastic sleeve, so that the elastic sleeve is prevented from being extruded from the demoulding rod.

Preferably, the lower die comprises a male die for forming a hollow structure of the appearance part, and a notch matched with the appearance of the limiting head is formed in the male die; when the ejector pin stretches into outward appearance piece, the notch can be used for holding spacing head avoids at the in-process of extrusion piece extrusion elastic sleeve, because spacing head's small inner wall that leads to outward appearance piece of rocking is by spacing head fish tail.

Preferably, the upper part of the male die is provided with a pressure regulating groove, a pressure regulating block is installed in the pressure regulating groove, the outer side of the pressure regulating block is provided with an external thread, the inner side of the pressure regulating groove is provided with an internal thread matched with the external thread, and a pressure regulating channel is further arranged in the male die; the notch is positioned in the pressure regulating block, and the mounting seat is also provided with a driving motor for driving the demoulding rod to rotate; in the process of withdrawing the demolding rod to take out the appearance piece, the elastic sleeve is extruded with the inner side face of the appearance piece, so that a vacuum cavity is formed between the elastic sleeve and the male die, the resistance of the appearance piece during demolding is increased, and the demolding difficulty is improved; and through driving motor drives the stripper bar rotates, can make the pressure regulating piece rotates in the terrace die, because the existence of pressure regulating piece outside screw thread, the pressure regulating piece also can the downstream at the pivoted in-process, the pressure regulating piece downstream back, the gas of pressure regulating groove lower part can be arranged between terrace die and the elastic sleeve through the pressure regulating passageway to avoid the production of vacuum cavity, make the drawing of patterns easier.

Preferably, the pressure regulating block comprises a lifting block and an exhaust block, the external thread is arranged on the outer side of the lifting block, a sealing gasket is fixed on the exhaust block, and the pressure regulating groove comprises a lifting groove matched with the lifting block and an exhaust groove matched with the exhaust block; one end of the pressure regulating channel is communicated with the upper part of the lifting groove, and the other end of the pressure regulating channel is communicated with the lower part of the exhaust groove; when the pressure regulating piece does not have the downstream, its upper end of plugging up the pressure regulating passageway to as the partly fashioned effect that plays of terrace die, when the pressure regulating piece downstream, pressure regulating passageway and lift groove upper portion intercommunication, the exhaust piece is extruded gas from the pressure regulating passageway between elastic sleeve and the terrace die.

Preferably, the demolding assembly further comprises a mounting seat, an extrusion cylinder for pushing the extrusion block is mounted on the mounting seat, the extrusion cylinder comprises a plurality of extrusion heads, and the demolding rods are mounted in the extrusion heads; through the structure, the demoulding rod can demould a plurality of appearance pieces simultaneously when descending once, and the working efficiency of demoulding is improved.

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.

Therefore, the invention has the following beneficial effects: (1) when the appearance piece is demoulded, the appearance piece is not touched on the outer side and the inner part of the appearance piece is not damaged; (2) can be suitable for appearance pieces with smaller size; (3) the resistance received in the process of taking out the appearance piece is small; (4) can demould a plurality of outward appearance pieces simultaneously, work efficiency is higher.

Drawings

Fig. 1 is a partial cross-sectional view of a first embodiment of the present invention.

Fig. 2 is a schematic, partially cross-sectional view of the stripper assembly of the first embodiment of the invention after the stripper block has been moved downwardly.

Fig. 3 is a partial cross-sectional view of a second embodiment of the present invention.

Fig. 4 is a partially enlarged view of the second embodiment of the invention at the appearance piece and punch of fig. 3.

In the figure: 1. the device comprises an appearance piece 2, a lower die 3, a demoulding component 4, a mounting opening 5, a male die 6, a mounting seat 7, an extrusion block 8, a lifting cylinder 9, a demoulding rod 10, a limiting head 11, an extrusion head 12, an elastic sleeve 13, a notch 14, a driving motor 15, a transmission gear 16, a lifting groove 17, an exhaust groove 18, a lifting block 19, an exhaust block 20, a sealing gasket 21 and a pressure regulating channel.

Detailed Description

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

The first embodiment is as follows: as shown in fig. 1-2, an exterior piece demolding structure comprises an exterior piece 1 with a hollow structure, a lower mold 2 for molding the exterior piece, and a demolding component 3 for demolding the exterior piece from the lower mold; the appearance piece is a shell of the vehicle-mounted camera, an inner cavity for mounting a lens is formed in the lower portion of the appearance piece, the inner cavity is communicated with the upper portion of the appearance piece through a mounting hole 4, the lower die comprises a male die 5 filled in the inner cavity, and the mounting hole is filled in part through an upper die; the drawing of patterns subassembly includes mount pad 6, install extrusion piece 7 on the mount pad and be used for driving the lift cylinder 8 that extrusion piece goes up and down, the downside of mount pad still is equipped with two ejector pin 9, the bottom of ejector pin is equipped with spacing head 10, be equipped with two extrusion heads 11 of cover in the ejector pin outside on the extrusion piece, be equipped with elastic sleeve 12 between extrusion head and the spacing head, the external diameter of elastic sleeve and spacing head all slightly is less than the internal diameter of installing port.

When demolding is performed using this structure: firstly, the installation seat is moved to enable the elastic sleeve to extend into the installation opening, then the lifting cylinder drives the extrusion block to move downwards, the demolding rod is fixed on the installation seat and cannot move along with the extrusion block, so that the distance between the limiting head and the extrusion head is reduced, the limiting sleeve is extruded, the limiting sleeve can bulge after being extruded, the diameter of the bulged limiting sleeve is increased, the bulged limiting sleeve and the inner wall of the installation opening are elastically extruded, then the installation seat moves upwards, and the appearance piece is taken out of the male die through the friction force between the elastic sleeve and the appearance piece.

Example two: as shown in fig. 3-4, an appearance piece demoulding structure comprises an appearance piece 1 with a hollow structure, a lower mould 2 for forming the appearance piece and a demoulding component 3 for demoulding the appearance piece from the lower mould; the appearance piece is a shell of the vehicle-mounted camera, an inner cavity for mounting a lens is formed in the lower portion of the appearance piece, the inner cavity is communicated with the upper portion of the appearance piece through a mounting hole 4, the lower die comprises a male die 5 filled in the inner cavity, a notch 13 is formed in the upper side of the male die, and the mounting hole and the notch are filled by the upper die during forming; the demolding assembly comprises a mounting seat 6, wherein an extrusion block 7 and a lifting cylinder 8 for driving the extrusion block to lift are mounted on the mounting seat, two demolding rods 9 and two driving motors 14 for driving the demolding rods to rotate are mounted on the mounting seat, the driving motors drive the demolding rods through two transmission gears 15 mounted inside the mounting seat, a limiting head 10 is arranged at the bottom end of each demolding rod, the limiting head is hexagonal in cross-sectional shape and matched with the notch, the limiting head can also be any shape except circular, two extrusion heads 11 sleeved on the outer sides of the demolding rods are arranged on the extrusion block, an elastic sleeve 12 is arranged between each extrusion head and the corresponding limiting head, and the outer diameters of the elastic sleeve and the limiting head are slightly smaller than the inner diameter of the mounting opening; the upper portion of terrace die is equipped with the pressure regulating groove, the pressure regulating groove is including lift groove 16 and exhaust duct 17, be equipped with the internal thread on the lateral wall of lift groove, the internal diameter of exhaust duct is less than the internal diameter of lift groove, install the pressure regulating piece in the pressure regulating groove, the pressure regulating piece includes elevator 18 and exhaust piece 19, the elevator outside be equipped with the external screw thread of internal thread adaptation, install sealed pad 20 on the exhaust piece, the bottom in pressure regulating groove is connected with pressure regulating channel 21, the upper end of pressure regulating channel with the upper portion intercommunication of exhaust duct.

When demolding is performed using the present structure: firstly, the elastic sleeve extends into the mounting opening by moving the mounting base, the limiting head is adapted to extend into the notch, then the limiting head is driven to rotate by the driving motor, the lifting block is driven to rotate while the limiting head rotates, the lifting block moves downwards while rotating, so that the exhaust block also moves downwards together, the exhaust block can exhaust gas in the exhaust groove through the pressure regulating channel while moving downwards, and after the lifting block moves downwards, the upper end of the pressure regulating channel is not blocked by the lifting block any more, the gas enters the upper part of the lifting groove from the pressure regulating channel, so that a vacuum cavity is prevented from being formed between the elastic block and the male die; when the demoulding rod rotates, the mounting seat keeps a fixed state, so that the height position of the demoulding rod still keeps inconvenient; after the stop rotating stripper bar, through the lift cylinder drives the extrusion piece moves down, and the stripper bar can not remove along with the extrusion piece, therefore the distance between spacing head and the extrusion head reduces, thereby will the stop collar extrudees, can bulge after the stop collar is extruded, and the stop collar diameter after the bulge increases, and with the elastic extrusion takes place for the inner wall of installing port, then will mount pad rebound takes out outward appearance piece from the terrace die through the frictional force between elastic sleeve and the outward appearance piece.

Claims

1. An appearance piece demoulding structure comprises an appearance piece with a hollow structure, a lower mould for forming the appearance piece and a demoulding component for demoulding the appearance piece from the lower mould, and is characterized in that the demoulding component comprises a demoulding rod which can extend into the appearance piece, an elastic sleeve is sleeved on the demoulding rod, and an extrusion block for extruding the elastic sleeve is further mounted on the demoulding rod; the lower die comprises a male die of a hollow structure for forming the appearance piece, the demoulding rod is provided with a limit head, the elastic sleeve is positioned between the extrusion block and the limiting head, the upper part of the male die is provided with a pressure regulating groove, the pressure regulating groove is internally provided with a pressure regulating block which comprises a lifting block and an exhaust block, the pressure regulating groove comprises a lifting groove matched with the lifting block and an exhaust groove matched with the exhaust block, the lifting block is provided with a notch, the limiting head is matched with the notch, the male die is also provided with a pressure regulating channel, one end of the pressure regulating channel is communicated with the upper part of the lifting groove, the other end of the pressure regulating channel is communicated with the lower part of the exhaust groove, the limiting head can drive the lifting block to rotate while rotating, the lifting block can move downwards while rotating, so that the exhaust block moves downward together with the exhaust block, and the exhaust block exhausts the gas in the exhaust groove through the pressure regulating passage while moving downward.

2. The appearance piece demolding structure according to claim 1, wherein the demolding assembly further comprises a mounting seat, an external thread is arranged on the outer side of the pressure regulating block, and an internal thread matched with the external thread is arranged on the inner side of the pressure regulating groove; the notch is positioned in the pressure regulating block, and the mounting seat is provided with a driving motor for driving the demoulding rod to rotate.

3. The exterior member demold structure according to claim 2, wherein the external thread is provided outside the elevating block, and a sealing gasket is fixed to the exhaust block.

4. The appearance piece demolding structure according to claim 2, wherein an extrusion cylinder for pushing the extrusion block is mounted on the mounting base, the extrusion cylinder comprises a plurality of extrusion heads, and the demolding rod is mounted in each of the extrusion heads.

5. The appearance member release structure according to any one of claims 1 to 4, wherein the elastic sleeve is made of silicone.