CN107160641B

CN107160641B - One-time injection molding mould for wood-like hollow chair foot and armrest chair

Info

Publication number: CN107160641B
Application number: CN201710597833.4A
Authority: CN
Inventors: 陈树钦; 蔡乙鹏; 魏协奔; 曹艳彬; 黄海鹏
Original assignee: Jieyang Dali Plastics Mould Factory Co ltd
Current assignee: Jieyang Dali Plastics Mould Factory Co ltd
Priority date: 2017-07-20
Filing date: 2017-07-20
Publication date: 2023-03-31
Anticipated expiration: 2037-07-20
Also published as: CN107160641A

Abstract

The invention discloses a mold for a one-time injection molding wood-like hollow chair leg armrest chair, wherein the mold opening strokes of a front mold and a rear mold in the mold are controlled by two groups of draw hooks with different strokes, wherein a short draw hook stroke component controls the mold opening distance between a mold core and the front mold, and a long draw hook stroke component controls the mold opening distance between the mold core and the rear mold; the front and rear chair leg core-pulling mechanisms comprise formed parts and oil cylinders, wedge blocks on the shovel base core-pulling mechanism are respectively arranged on the formed parts of the front and rear chair legs, the four groups of core-pulling oil cylinders are required to control the movement of the wedge blocks before the die opening, and the front and rear chair leg core-pulling mechanisms can work; after the mold is opened, the ejector oil cylinder controls the ejector pin to push the special-shaped ejector and drive the ejector block to eject the plastic part, and the whole mold opening action is finished. This novel mould is rational in infrastructure, and effectual solution hollow chair foot is loosed core difficult problem, and whole process of moulding plastics is in a complete stroke, and is easy and simple to handle.

Description

One-time injection molding mould for wood-like hollow chair foot and armrest chair

Technical Field

The invention relates to a mold for producing an armchair, in particular to a mold for a one-time injection molding of a hollow armchair foot made of imitation wood, and belongs to the technical field of molds for plastic products.

Background

The plastic armchair is widely applied at present due to good waterproof, anticorrosion and antirust performances. However, most of the existing plastic chairs in the market are mostly formed by blow molding, although a small amount of plastic chairs are formed by injection molding, the plastic chairs are provided with handrails, and most of the parts such as chair legs, chair seat boards, back boards and the like are formed by bending a layer of plastic plate into various structures and angles, especially the chair leg parts, for example, the cross sections of the chair legs of the existing plastic chairs are mostly in U-shaped or V-shaped open shapes, the plastic chairs with the structures are also formed by injection molding, the processing speed is high, but the structures are thin, the strength fastness is poor, the comfortable experience of sitting on the chair is poor, and the problems of simple style, low texture, short service life and the like exist. Aiming at the problems, designers design a structure that the chair foot part adopts a plastic hollow pipe, and other parts adopt a plastic armchair with an opening structure with a U-shaped cross section which is formed by one-time injection molding, so that the problems of unreasonable design, difficult demoulding, material waste and the like generally exist in the existing mould for forming the plastic armchair.

Disclosure of Invention

In order to solve the technical problems, the invention provides the mould for the wood-like hollow chair leg armrest chair formed by one-time injection molding, which has reasonable design, smooth demoulding and material saving.

The technical scheme of the invention is as follows:

the utility model provides a disposable injection moulding's mould for hollow chair foot handrail chair of imitative wood, includes that bottom plate, location locate the square iron on the bottom plate side, the back location locate the front mould on the square iron and can with the back mould of front mould compound die, the front of front mould is formed with preceding die cavity, the front of back mould is formed with the back die cavity, is equipped with the core in the cavity that forms behind this preceding die cavity and the back die cavity compound die to the position of chair under the user state is the benchmark position:

the front mould comprises a front mould and a rear mould, wherein a plurality of first guide through holes are formed in the two sides of the front surface of the front mould, the central axis of each first guide through hole is perpendicular to the front surface of the front mould, a guide rod is positioned in each first guide through hole, at least one second guide through hole is formed in each of the two sides of a mould core, the second guide through holes correspond to the positions of at least two of the first guide through holes, a third guide through hole is formed in each of the two sides of the front surface of the rear mould corresponding to the position of the first guide through hole, and the guide rod can penetrate through the second guide through holes and then penetrate through the third guide through holes;

the core-pulling mechanism for the front chair leg is arranged at the position, located at the bottom of the two rear chair legs, of the bottom of the mold core, the core-pulling mechanism for the front chair leg is arranged at the position, located at the bottom of the two front chair legs, of the bottom of the mold core, the core-pulling mechanisms for the front chair leg and the rear chair leg respectively comprise a forming piece, an oil cylinder and a travel switch, and a shovel base core-pulling mechanism capable of positioning the forming piece in the core-pulling direction is inserted in the forming piece in a positioning mode;

a short drag hook stroke assembly for controlling the mold opening distance between the front mold and the mold core is arranged between the outer side wall of the front mold and the outer side wall of the mold core, and a long drag hook stroke assembly for controlling the mold opening distance between the rear mold and the mold core is arranged between the outer side wall of the mold core and the outer side wall of the rear mold;

the two sides of the mold core are respectively provided with a push block at the front end of the lower part of the chair armrest in a positioning manner, the positions close to the push blocks are respectively provided with an L-shaped special-shaped top, one side of the L-shaped special-shaped top is embedded in the push block, and the other side of the L-shaped special-shaped top is embedded in the groove in the side wall of the mold core and can slide upwards along the groove and drive the push block to upwards push against the molded chair armrest to eject out the chair.

The further technical scheme is as follows:

the molding part comprises a columnar molding part and a connecting part fixedly connected with the columnar molding part; the shovel-based core pulling mechanism comprises a wedging block and a core pulling oil cylinder which is connected with the wedging block in a positioning mode, a groove is formed in the connecting portion, and the end portion of the wedging block is inserted into the groove of the connecting portion in the direction perpendicular to the drawing direction of the columnar forming portion.

The bottom of front mould sets firmly first spacing frame, is equipped with the gliding first movable plate of its length direction of following on this first spacing frame, the output and the first movable plate of the hydro-cylinder of back chair foot mechanism of loosing core are connected, and the connecting portion of the forming part of back chair foot mechanism of loosing core also location connection on this first movable plate.

The bottom of the mold core is fixedly provided with a fixed plate, the bottom of the fixed plate is fixedly provided with a second limiting frame, a second movable plate capable of interacting along the length direction of the second limiting frame is arranged on the second limiting frame, the output end of an oil cylinder of the front chair foot core pulling mechanism is connected with the second movable plate, and the connecting part of a forming part of the front chair foot core pulling mechanism is also connected to the second movable plate in a positioning mode.

The short draw hook stroke assembly comprises a front mold limiting block fixedly arranged on the front mold, a first mold core limiting block fixedly arranged on the mold core and a short draw hook, and the short draw hook penetrates through and is limited between the front mold limiting block and the first mold core limiting block; the long draw hook stroke assembly comprises a rear mold limiting block fixedly arranged on the rear mold, a second mold core limiting block fixedly arranged on the mold core and a long draw hook, and the long draw hook is arranged on the rear mold limiting block in a penetrating mode and limited between the rear mold limiting block and the second mold core limiting block.

The bottom of the special-shaped top is connected with a thimble control plate, the thimble control plate is connected with an ejection oil cylinder in a positioning mode, and the special-shaped top can be ejected upwards by the thimble control plate under the control of the ejection oil cylinder.

The beneficial technical effects of the invention are as follows: the die opening stroke of a front die and a rear die in the die is controlled by two groups of drag hooks with different strokes, wherein a short drag hook stroke assembly controls the die opening distance between a die core and the front die, and a long drag hook stroke assembly controls the die opening distance between the die core and the rear die; the front and rear chair leg core-pulling mechanisms comprise formed parts and oil cylinders, wedge blocks on the shovel base core-pulling mechanism are respectively arranged on the formed parts of the front and rear chair legs, the four groups of core-pulling oil cylinders are required to control the movement of the wedge blocks before the die opening, and the front and rear chair leg core-pulling mechanisms can work; after the mold is opened, the ejector cylinder controls the ejector pin to push the special-shaped ejector and drive the ejector block to eject the plastic part, and the whole mold opening action is finished. This novel mould is rational in infrastructure, and effectual solution hollow chair foot is loosed core difficult problem, and whole process of moulding plastics is in a complete stroke, and is easy and simple to handle.

Drawings

FIG. 1 is a schematic side view of the mold of the present invention after closing;

FIG. 2 is a schematic structural diagram of the front side of the mold of the present invention after the mold is closed;

FIG. 3 is a schematic view of the bottom structure of the mold of the present invention after closing;

FIG. 4 is a schematic view of the rear mold structure of the present invention;

FIG. 5 is a schematic view of the front mold structure of the present invention;

FIG. 6 is a schematic view of the core construction of the present invention;

FIG. 7 is a schematic view of a partial relationship structure of the shovel base core-pulling mechanism and the front and rear chair leg core-pulling mechanisms according to the present invention;

FIG. 8 is a schematic view of the front mold and core of the present invention after assembly;

wherein:

1-a bottom plate;

2-square iron;

3-front mould; 31-front mold cavity; 32-a first guiding through hole; 33-a first limit frame; 34-a first moving plate;

4-back molding; 41-rear mold cavity; 42-a third guiding through hole;

5-a guide rod;

6-short drag hook stroke component; 61-front mold limiting block; 62-a first core stop; 63-short draw hook;

7-long drag hook stroke component; 71-rear mould limiting block; 72-a second core stopper; 73-long draw hook;

8-a rear chair leg core-pulling mechanism; 81-a shaped part; 81 a-a columnar shaped section; 81 b-a connecting part; 82-oil cylinder;

9-a front chair leg core-pulling mechanism;

10-a shovel-based core-pulling mechanism; 101-a wedge block; 102-core pulling oil cylinders;

11-a push block;

12-a core; 121-a second guiding through hole; 122-a trench; 123-a fixing plate; 124-a second limit frame; 125-a second moving plate;

13-a shaped roof; 131-ejecting oil cylinder.

Detailed Description

In order to make the technical means of the present invention clearer and to make the technical means of the present invention capable of being implemented according to the content of the specification, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples, which are provided for illustrating the present invention and are not intended to limit the scope of the present invention.

The mould is mainly used for forming the one-time injection molding imitation wood hollow armchair with chair legs. The mold comprises a bottom plate 1 connected with an injection molding machine, square iron 2 positioned on one side surface of the bottom plate, a front mold 3 positioned on the square iron on the back surface, and a rear mold 4 capable of being matched with the front mold, wherein a front mold cavity 31 is formed on the front surface of the front mold, a rear mold cavity 41 is formed on the front surface of the rear mold, a mold core 12 is arranged in a cavity formed by matching the front mold cavity and the rear mold cavity, and the mold is described by taking the direction of the chair in a use state as a reference direction, namely, the front, back, left, right, upper and lower directions of a user sitting on the chair as the reference direction in the following specific embodiment.

In the mold, a plurality of first guiding through holes 32 are formed in both sides of the front surface of the front mold 3, in this embodiment, three first guiding through holes are formed in the left side and the right side at intervals, the central axis of each first guiding through hole is perpendicular to the front surface of the front mold, and a guiding rod 5 is positioned in each first guiding through hole. Both sides of the core 12 are provided with at least one second guiding through hole 121, in this embodiment, a second guiding through hole is provided at a position near the middle of both sides of the core, the second guiding through hole corresponds to two of the first guiding through holes, a third guiding through hole 42 is provided at a position corresponding to the first guiding through hole on both sides of the front surface of the rear mold 4, the guide rod 5 can be inserted into the third guiding through hole after passing through the second guiding through hole, that is, the guide rod 5 is inserted into the first guiding through hole and the third guiding through hole at both ends of the front mold and the rear mold, and at least two guide rods 5 are inserted into the front mold, the core and the rear mold. The first, second and third guide through holes of the guide rod are matched with each other, and the guide rod is mainly used for enabling a front die, a rear die and a core of the die to be aligned correctly in the die opening and closing process.

The bottom of the front die 3 is positioned at the bottoms of the two rear chair legs and is provided with a rear chair leg core pulling mechanism 8, the bottom of the core 12 is positioned at the bottoms of the two front chair legs and is provided with a front chair leg core pulling mechanism 9, the front chair leg core pulling mechanism and the rear chair leg core pulling mechanism respectively comprise a forming part 81, an oil cylinder 82 and a travel switch, and the forming part 81 comprises a columnar forming part 81a and a connecting part 81b fixedly connected with the columnar forming part 81 a; the shovel-based core-pulling mechanism 10 comprises a wedge block 101 and a core-pulling oil cylinder 102 connected with the wedge block in a positioning mode, a groove is formed in a connecting portion 81b, the end portion of the wedge block is inserted into the groove of the connecting portion 81b along the direction perpendicular to the drawing direction of a columnar forming portion 81a, and the shovel-based core-pulling mechanism positions a formed piece in the core-pulling direction through the mode that the wedge block is inserted into the groove of the connecting portion. Before the mold is opened, the four groups of core-pulling oil cylinders 102 are required to control the wedge blocks connected with the core-pulling oil cylinders to be pulled out from the grooves of the inserted connecting parts, and then the subsequent mold opening process between the front mold and the core and between the rear mold and the core can be carried out.

The bottom of the front mold 3 is fixedly provided with a first limit frame 33, the first limit frame is provided with a first movable plate 34 capable of sliding along the length direction of the first limit frame, the output end of an oil cylinder 82 of the rear chair leg core pulling mechanism is connected with the first movable plate, and a connecting part 81b of a forming part of the rear chair leg core pulling mechanism is also connected to the first movable plate in a positioning manner. When the core-pulling action of the rear chair leg is performed, the core-pulling oil cylinder 102 is started to drive the wedge block 101 to be pulled away from the connecting part 81b, and then the oil cylinder 82 of the rear chair leg core-pulling mechanism is started to drive the first moving plate to move downwards, so that the connecting part 81b is driven to move downwards, and the columnar forming part 81a is pulled away from the tubular structure of the rear chair leg.

Similarly, the bottom of the core 12 is fixedly provided with a fixed plate 123, the bottom of the fixed plate is fixedly provided with a second limiting frame 124, the second limiting frame is provided with a second movable plate 125 capable of interacting along the length direction of the second limiting frame, the output end of the oil cylinder 82 of the front chair leg core pulling mechanism is connected with the second movable plate, and the connecting portion 81b of the forming part of the front chair leg core pulling mechanism is also connected to the second movable plate in a positioning manner. When the core-pulling action of the front chair leg is performed, the core-pulling oil cylinder 102 is started to drive the wedging block 101 to be pulled away from the connecting part 81b, and then the oil cylinder 82 of the front chair leg core-pulling mechanism is started to drive the second moving plate 125 to move downwards, so that the connecting part 81b is driven to move downwards, and the columnar forming part 81a is pulled away from the tubular structure of the front chair leg.

Be equipped with the long drag hook stroke subassembly 7 of die sinking distance between control back mould and the core between the lateral wall of core 12 and the lateral wall of back mould 4, this long drag hook stroke subassembly 7 is including setting firmly back mould stopper 71 on the back mould lateral wall, set firmly second type core stopper 72 and a long drag hook 73 on the core lateral wall, the length of long drag hook is the die sinking distance between back mould and the core, and the both ends of long drag hook are formed with "T" shape spacing end, this long drag hook is worn to establish in back mould stopper and second type core stopper, and spacing between this back mould stopper and second type core stopper of "T" shape spacing end through both ends. The rear mould is separated from the core by the mould opening force of the mould, and the mould opening distance between the rear mould and the core is controlled by the long draw hook. Be equipped with the short drag hook stroke subassembly 6 of die sinking distance between control front mould and the core between the lateral wall of front mould 3 and the lateral wall of core 12, this short drag hook stroke subassembly 6 is including setting firmly front mould stopper 61 on the 3 lateral walls of front mould, set firmly first core stopper 62 and a short drag hook 63 on the 12 lateral walls of core, the length of this short drag hook is the die sinking distance between front mould and the core, and the both ends of short drag hook are formed with the spacing end of "T" shape, this short drag hook wears to establish in front mould stopper and first core stopper, and it is spacing between this front mould stopper and first core stopper to locate through the spacing end of "T" shape at both ends. The mold core is separated from the front mold by the mold opening force of the mold, and the mold opening distance between the mold core and the front mold is controlled by the short draw hook.

The two sides of the mold core 12 are respectively provided with a push block 11 at the front end of the lower part of the chair armrest in a positioning way, the positions close to the push blocks are respectively provided with an L-shaped special-shaped top 13, one side of the L-shaped special-shaped top is embedded in the push block, the other side of the L-shaped special-shaped top is embedded in a groove 122 on the side wall of the mold core, the bottom of the special-shaped top 13 is connected with a thimble control plate, the thimble control plate is connected with an ejection oil cylinder 131 in a positioning way, the special-shaped top can be ejected upwards by the thimble control plate under the control of the ejection oil cylinder, in particular, the ejection oil cylinder controls the thimble of the thimble control plate corresponding to the special-shaped top to be ejected upwards, the thimble is ejected to the bottom of the other side of the L-shaped structure, the side slides upwards along the groove and drives the push block to move upwards, and the push block is used for ejecting the chair out by propping against the lower part of the molded chair armrest.

When the mold is opened, core-pulling oil cylinders in four groups of shovel-based core-pulling mechanisms are started to pull a wedge-caulking block away from a connecting part on a front chair foot core-pulling mechanism and a rear chair foot core-pulling mechanism, then a mold opening force is utilized to push a rear mold away from a mold core, the pushing distance is controlled by a long draw hook, then oil cylinders on the front chair foot core-pulling mechanism and the rear chair foot core-pulling mechanism are started simultaneously to drive a first movable plate and a second movable plate to move downwards, the first movable plate and the second movable plate simultaneously drive the connecting part on the front chair foot core-pulling mechanism and the rear chair foot core-pulling mechanism to move downwards and pull a columnar forming part away from four chair legs, then the mold core is pushed away from a front mold by utilizing the mold opening force, the pushing distance is controlled by a short draw hook, finally, an ejection oil cylinder on an ejector pin control plate pushes up a special-shaped ejector pin, the special-shaped ejector pin drives an ejector pin to move upwards, and the ejector pin pushes the lower part of a formed chair armrest to thoroughly eject the chair out of the chair from the mold.

The mold opening strokes of a front mold and a rear mold in the mold are controlled by two groups of draw hooks with different strokes, wherein a short draw hook stroke assembly controls the mold opening distance between a mold core and the front mold, and a long draw hook stroke assembly controls the mold opening distance between the mold core and the rear mold; the front and rear chair leg core-pulling mechanisms comprise formed parts and oil cylinders, wedge blocks on the shovel base core-pulling mechanism are respectively arranged on the formed parts of the front and rear chair legs, the four groups of core-pulling oil cylinders are required to control the movement of the wedge blocks before the die opening, and the front and rear chair leg core-pulling mechanisms can work; after the mold is opened, the ejector cylinder controls the ejector pin to push the special-shaped ejector and drive the ejector block to eject the plastic part, and the whole mold opening action is finished. This novel mould is rational in infrastructure, and effectual solution hollow chair foot is loosed core difficult problem, and whole process of moulding plastics is in a complete stroke, and is easy and simple to handle.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a disposable injection moulding's hollow chair foot of imitative wood mould for handrail chair, includes bottom plate (1), the square iron (2) on the bottom plate side are located in the location, the back location locates front mould (3) on the square iron and can with back mould (4) of front mould compound die, the front of front mould is formed with preceding die cavity (31), the front of back mould is formed with back die cavity (41), is equipped with core (12) in the cavity that forms behind this preceding die cavity and the back die cavity compound die to the position of chair under the user state is the benchmark position, its characterized in that:

a plurality of first guide through holes (32) are formed in the two sides of the front face of the front die (3), the central axis of each first guide through hole is perpendicular to the front face of the front die, a guide rod (5) is positioned in each first guide through hole, at least one second guide through hole (121) is formed in each of the two sides of the mold core (12), the second guide through holes correspond to at least two of the first guide through holes, third guide through holes (42) are formed in the two sides of the front face of the rear die (4) corresponding to the first guide through holes, and the guide rods can penetrate through the second guide through holes and then penetrate through the third guide through holes;

a rear chair leg core-pulling mechanism (8) is arranged at the bottom of the front mold (3) and positioned at the bottoms of the two rear chair legs, a front chair leg core-pulling mechanism (9) is arranged at the bottom of the mold core (12) and positioned at the bottoms of the two front chair legs, the front chair leg core-pulling mechanism and the rear chair leg core-pulling mechanism respectively comprise a forming piece (81), an oil cylinder (82) and a travel switch, and a shovel base core-pulling mechanism (10) capable of positioning the forming piece in the core-pulling direction is inserted in the forming piece in a positioning mode; the molding part (81) comprises a columnar molding part (81 a) and a connecting part (81 b) fixedly connected with the columnar molding part; the shovel-based core pulling mechanism (10) comprises a wedging block (101) and a core pulling oil cylinder (102) which is connected with the wedging block in a positioning mode, a groove is formed in the connecting portion (81 b), and the end portion of the wedging block is inserted into the groove of the connecting portion (81 b) along the direction perpendicular to the pulling direction of the columnar forming portion (81 a);

a short drag hook stroke assembly (6) for controlling the mold opening distance between the front mold and the mold core is arranged between the outer side wall of the front mold (3) and the outer side wall of the mold core (12), and a long drag hook stroke assembly (7) for controlling the mold opening distance between the rear mold and the mold core is arranged between the outer side wall of the mold core (12) and the outer side wall of the rear mold (4); the short draw hook stroke assembly (6) comprises a front mold limiting block (61) fixedly arranged on the front mold, a first mold core limiting block (62) fixedly arranged on the mold core and a short draw hook (63), and the short draw hook penetrates through and is limited between the front mold limiting block and the first mold core limiting block; the long draw hook stroke assembly (7) comprises a rear mold limiting block (71) fixedly arranged on the rear mold, a second mold core limiting block (72) fixedly arranged on the mold core and a long draw hook (73), and the long draw hook penetrates through and is limited between the rear mold limiting block and the second mold core limiting block;

a push block (11) is respectively positioned at the front end of the lower part of the chair armrest on two sides of the mold core (12), an L-shaped special-shaped top (13) is respectively arranged at the position close to the push block, one side of the L-shaped special-shaped top is embedded in the push block, the other side of the L-shaped special-shaped top is embedded in a groove (122) in the side wall of the mold core and can slide upwards along the groove and drive the push block to upwards push against the molded chair armrest to eject the chair; the bottom of the special-shaped top (13) is connected with a thimble control board, the thimble control board is connected with an ejection oil cylinder (131) in a positioning way, and the special-shaped top can be ejected upwards by the thimble control board under the control of the ejection oil cylinder.

2. The mold for the disposable injection-molded imitation wood hollow chair foot, armrest and chair according to claim 1, wherein the mold comprises: the bottom of the front die (3) is fixedly provided with a first limiting frame (33), the first limiting frame is provided with a first movable plate (34) capable of sliding along the length direction of the first limiting frame, the output end of an oil cylinder (82) of the rear chair leg core pulling mechanism is connected with the first movable plate, and a connecting part (81 b) of a forming part of the rear chair leg core pulling mechanism is also connected to the first movable plate in a positioning mode.

3. The mold for the disposable injection-molded imitation wood hollow chair foot, armrest chair according to claim 1, characterized in that: the bottom of the mold core (12) is fixedly provided with a fixed plate (123), the bottom of the fixed plate is fixedly provided with a second limiting frame (124), a second movable plate (125) capable of interacting along the length direction of the second limiting frame is arranged on the second limiting frame, the output end of an oil cylinder (82) of the front chair foot core pulling mechanism is connected with the second movable plate, and a connecting part (81 b) of a forming part of the front chair foot core pulling mechanism is also connected to the second movable plate in a positioning mode.