CN111571920B

CN111571920B - Method for correcting position of material in mold

Info

Publication number: CN111571920B
Application number: CN202010454209.0A
Authority: CN
Inventors: 袁腾; 刘佳; 张永龙
Original assignee: Goertek Optical Technology Co Ltd
Current assignee: Goertek Inc
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2022-05-20
Anticipated expiration: 2040-05-26
Also published as: CN111571920A

Abstract

The invention discloses a method for correcting the position of a material in a mold, which comprises the following steps: s1, a material placing unit in the manipulator tool sucks materials; s2, releasing and transferring the material to a mould suction head of the mould by the material placing unit; s3, moving the material placing unit to a secondary back pressure position, and simultaneously, actuating an ejection correction unit arranged on the die; the material placing unit and the ejection correcting unit act on two opposite ends of the material respectively, and position correction of the material on the suction head of the mold is completed in a matched mode. The invention can correct the position of the material in the mold before mold closing and injection molding, thereby improving the position precision of the material and the yield of the injection molded product.

Description

Method for correcting position of material in mold

Technical Field

The invention belongs to the technical field of product injection molding, and particularly relates to a method for correcting the position of a material in a mold before injection molding.

Background

In the field of injection molding of high-precision electronic products, the products are often provided with thin materials, the thin materials influence the acoustic performance of the electronic products, and the position precision requirement is very strict. Thin material is placed mainly has the plane and the side is placed two kinds, and wherein the thin material of side is placed the degree of difficulty higher, and the position precision is more difficult to manage and control. At present, a manipulator sucks cut thin materials to place the thin materials on a die, the material positions cannot be accurately controlled, and product defects and the influenced yield are extremely easy to cause.

In view of this, it is necessary to improve the prior art, and develop and design a method for correcting the position of the material in the mold, especially the thin material, before the mold closing and injection molding, so as to improve the position accuracy of the thin material and the yield of the injection molded product.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and the technical problem to be solved is to provide the method for correcting the position of the material in the mold, which can correct the position of the material in the mold before mold closing and injection molding, and improves the position precision of the material and the yield of the injection molded product.

In order to solve the technical problem, an embodiment of the present invention provides a method for correcting a position of a material in a mold, where the method includes:

s1, a material placing unit in the manipulator tool absorbs materials;

s2, releasing and transferring the material to a mold suction head of the mold by the material placing unit;

s3, moving the material placing unit to a secondary back pressure position, and simultaneously, moving an ejection correction unit arranged on the die; the material placing unit and the ejection correcting unit respectively act on two opposite ends of the material to complete the position correction of the material on the die suction head in a matching manner.

Further, the method further includes, after the step S1, a step S20 performed before the step S2;

and S20, moving a product taking-out unit in the manipulator tool to the interior of the mold, and taking out the mold closing injection molding product finished in the previous cycle.

Further, the method further comprises:

s4, the manipulator tool and the ejection correction unit are restored to initial positions;

s5, carrying out die assembly and injection molding;

s6, placing the mold-closing injection-molded product taken out to a product placing position by the product taking-out unit;

wherein, the sequence of the step S5 and the step S6 can be interchanged, and can also be executed simultaneously.

Further, the mould is horizontally placed; the material placing unit moving to the secondary back pressure position is located above the material, and the ejection correcting unit is located below the material.

Further, the manipulator tool is connected with a manipulator, and the manipulator is used for carrying the materials and the die-closing injection molding products;

the manipulator tool comprises a first mounting plate, wherein the first mounting plate is provided with a material placing unit and a product taking unit, the material placing unit is used for placing and taking the compound die injection molding product, and the product taking unit is used for taking the compound die injection molding product.

Further, the product taking-out unit comprises a first driving piece arranged on the first mounting plate, a second mounting plate is arranged on a power output portion of the first driving piece, and a sucker assembly used for taking and placing the die assembly injection molding product is arranged on the second mounting plate.

Further, the material placing unit comprises a third mounting plate connected with the first mounting plate, and a suction head mechanism and a power mechanism for taking and placing the material are arranged on the third mounting plate; the power mechanism is used for driving at least one sucker mechanism to move.

Further, the power mechanism comprises a driving assembly and a sliding block assembly of the sliding rail;

the driving assembly comprises a second driving piece arranged on the back surface of the third mounting plate and a push plate connected with a power output part of the second driving piece; the sliding block assembly of the sliding rail comprises a sliding rail arranged on the back of the third mounting plate and a sliding block arranged on the sliding rail in a sliding manner; the push plate is connected with the sliding block.

Further, the suction head mechanism comprises a mounting seat fixed on the back of the third mounting plate, a tool suction head is arranged in the mounting seat in a sliding mode, and a suction part of the tool suction head extends out of the third mounting plate;

the tool suction head is provided with a connecting piece, one end of the connecting piece is passed the push plate and the tool suction head is connected, the other end of the connecting piece is provided with a limiting part, the connecting piece is located the limiting part and the part between the push plate is sleeved with an elastic piece, and the connecting piece is located the push plate and the part between the tool suction heads is provided with a push block in a sliding mode.

Further, the die comprises a body and a module arranged on the body, and the suction head of the die is arranged on the module;

the ejection correction unit comprises a driving cylinder arranged on the body and a movable plate slidably mounted in the body, the power output part of the driving cylinder is connected with the movable plate, a correction block is arranged on the movable plate at the inner side of the module, and a through hole for the correction block to penetrate out is formed in the module.

Due to the adoption of the technical scheme, the beneficial effects are as follows:

in the invention, a material placing unit in a manipulator tool releases a sucked material (thin material) to a die suction head of a die; then the material placing unit moves to a secondary back pressure position, and meanwhile, a correction ejection unit which is newly added on the die acts, and the correction ejection unit act on the two opposite ends of the material respectively; finishing the position correction of the material in the mold before mold closing and injection molding in a cooperative manner; the position precision of the material and the yield of the injection molded product are improved. The device is particularly suitable for correcting the position of thin materials laterally placed in a die.

Drawings

FIG. 1 is a flow chart of the method for correcting the position of a material in a mold according to the present invention;

FIG. 2 is a schematic view of a partial structure of a robot tooling;

FIG. 3 is a schematic view of a rear partial structure of the material placement unit of FIG. 2;

FIG. 4 is a schematic diagram of the structure of the suction head mechanism and the power mechanism in the material placing unit;

FIG. 5 is a schematic view of a partial structure of a mold;

FIG. 6 is a schematic view of the installation structure of the ejection straightening unit and the module;

FIG. 7 is a reference view showing a state in which the material placing unit releases the thin material to be transferred to the die tip;

fig. 8 is a state reference diagram in the case of the thin material position correction;

in the figure: 1-manipulator tool, 11-first mounting plate, 12-product taking-out unit, 121-first driving piece, 122-second mounting plate, 123-sucker component, 13-material placing unit, 131-third mounting plate, 132-sucker mechanism, 1321-mounting seat, 1322-tool sucker, 1323-connecting piece, 1324-spring, 1325-pushing block, 133-power mechanism, 1331-second driving piece, 1332-pushing block, 1333-sliding rail, 1334-sliding block, 2-mould, 21-body, 22-module, 221-mould sucker, 23-ejection correcting unit, 231-moving plate, 232-driving cylinder, 233-correcting block, 234-pushing block, 3-thin material and a-secondary back pressure position.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments of the present invention are merely for convenience of description and are not to be construed as limiting the present invention.

As shown in fig. 1, 2 and 5, the embodiment discloses a method for correcting the position of an in-mold material, which is implemented based on cooperation of a manipulator tool 1 and a mold 2. The manipulator tool 1 is arranged on a manipulator or other two-axis and three-axis conveying mechanisms and is used for conveying a die-closing injection molding product or material among stations; the structure of the manipulator and the two-axis/three-axis carrying mechanism is the same as that of the prior art, and the detailed description is omitted here. The manipulator tool 1 comprises a material placing unit 13 for sucking and releasing materials and a product taking unit 12 for taking and placing a die-assembly injection molding product; it is also possible to include only the material placement unit 13, while the separate product extraction unit 12 can be connected directly to a robot or other two/three-axis handling mechanism; the method disclosed in this embodiment is applicable to any structure that can achieve the functions of taking out a product and placing a material.

A specific in-mold material position correction method implemented based on the structure will be explained below by taking as an example a structure in which the product taking-out unit 12 and the material placing unit 13 are integrated on the robot tool 1.

The method for correcting the position of the material in the mold comprises the following steps:

s1, the material placing unit 13 in the manipulator tool 1 sucks the material (thin material 3, see fig. 7).

The specific action process is as follows: the manipulator carries manipulator frock 1 to move to the material and deposits the position, and the unit 13 action is placed to the material carries out the absorption of material.

And S20, moving the product taking-out unit 12 in the manipulator tool to the interior of the mold 2, and taking out the mold closing injection product finished in the previous cycle.

The specific action process is as follows: the manipulator carries the manipulator frock 1 to the motion of 2 directions on the mould, when moving to the product and take out the position, the product is taken out unit 12 and is moved to the inside of mould 2, carries out the absorption of compound die injection product.

S2, the material placing unit 13 releases the transfer material onto the mold suction head 221 of the mold 2 (see fig. 5).

The specific action process is as follows: the manipulator carries the manipulator tool 1 to move to a material placing position, the material placing unit 13 releases materials (an air cut-off source), and the die suction head 221 sucks the materials (an air cut-off source) at the same time, so that the materials are transferred from the material placing unit 13 to the die suction head 221; at this time, the product take-out unit 12 is in a standby state carrying the mold-closed injection product.

S3, moving the material placing unit 13 to the secondary back pressure position a, and simultaneously, actuating the ejection correcting unit 23 arranged on the die 2; the material placing unit 13 and the ejection correcting unit 23 respectively act on two opposite ends of the material, and position correction of the material on the die suction head 221 is completed in a matching manner (see fig. 8).

S4, the robot tool 1 and the ejection correcting unit 23 are returned to the initial positions.

And S5, performing mold closing injection molding. The mold clamping injection molding process is well known to those skilled in the art and is not a point of improvement of the present invention, and is not described herein.

S6, the product take-out unit 12 sets the mold-closed injection-molded product taken out previously to a product set position.

Since the matched-mold injection and product placement are two separate processes. Therefore, the order of step S5 and step S6 may be reversed or performed simultaneously; preferably simultaneously.

In this embodiment, the mold 2 is placed horizontally; the material placing unit 13 moving to the secondary back pressure position a is located above the material, the ejection correction unit 23 is located below the material, and the material located between the material placing unit 13 and the ejection correction unit 23 is subjected to position correction.

The above-mentioned structure is explained in detail as shown collectively in fig. 2 to 4.

The manipulator tool 1 comprises a first mounting plate 11, and a material placing unit 13 and a product taking-out unit 12 are arranged on the first mounting plate 11.

In this embodiment, the product taking-out unit 12 includes a first driving member 121 (an air cylinder, which is a vertical air cylinder with respect to the horizontally placed mold 2) disposed on the connecting portion (not shown in the figure) of the first mounting plate 11, a second mounting plate 122 disposed on a power output portion of the first driving member 121, and a suction cup assembly 123 (including an air source connector, an air pipe, and a suction cup) for taking and placing a mold closing injection molding product mounted on the second mounting plate 122.

In this embodiment, the material placing unit 13 includes a third mounting plate 131 connected to a connecting column (not shown) disposed on the first mounting plate 11, and the third mounting plate 131 is provided with a suction head mechanism 132 and a power mechanism 133 for picking and placing materials; the power mechanism 133 is used for driving the at least one sucker mechanism 132 to move; in this embodiment, a power mechanism 133 can drive the two suction head mechanisms 132 to move.

The power mechanism 133 comprises a driving assembly and a sliding block assembly; the driving assembly comprises a second driving piece 1331 arranged on the back surface of the third mounting plate 131 and a push plate 1332 connected with the power output part of the second driving piece 1331; the sliding rail sliding block assembly comprises a sliding rail 1333 arranged at the back of the third mounting plate 131 and a sliding block 1334 arranged on the sliding rail 1333 in a sliding manner; the push plate 1332 is fixedly connected with the slide block 1334.

The suction head mechanism 132 includes a mounting seat 1321 fixed on the back of the third mounting plate 131, a tooling suction head 1322 is slidably mounted in the mounting seat 1321, and a suction portion of the tooling suction head 1322 (the body, the air source connector and the suction portion) vertically extends out of the third mounting plate 131. A connecting piece 1323 (bolt) is arranged on the body of the tool suction head 1322, one end of the connecting piece 1323 penetrates through the push plate 1332 (is in clearance fit with the push plate 1332) and is fixedly connected with the tool suction head 1322, the other end of the connecting piece 1323 is provided with a limiting part, an elastic piece (a spring 1324 or an elastic spacer sleeve) is sleeved on the connecting piece 1323 between the limiting part and the push plate, and a push block 1325 (a cylindrical structure) is arranged on the connecting piece 1323 between the push plate 1332 and the body of the tool suction head 1322 in a sliding mode.

As shown in fig. 5 and 6, in the present embodiment, the mold 2 includes a body 21, and a mold block 22 is disposed on the body 21; the module 22 is provided with a mounting groove for mounting the die tip 221. The body 21 is also provided with an ejection correction unit 23; the ejection correcting unit 23 comprises two driving cylinders 232 fixed on the body 21, power output parts of the two driving cylinders 232 are fixedly connected with push blocks 234 on two sides of a moving plate 231, and the moving plate 231 is slidably mounted in the body 21 and is positioned on the inner side of the module 22; the moving plate 231 is provided with a correcting block 233 extending vertically to the moving plate 231; the module 22 is provided with a through hole for the aligning member 233 to extend through, and a through hole is formed adjacent to a mounting groove so that the aligning member 221 corresponds to the adjacent position of the mold tip 211.

In this embodiment, the mold 2 and the manipulator tool 1 are matched with each other to correct the positions of a plurality of materials at the same time.

As shown in fig. 4, 7, and 8, the principle of implementing the position correction based on the method of the present embodiment is explained with respect to the structure shown in fig. 4 and the horizontal placement of the mold 2:

when the manipulator drives the manipulator tool 1 to move towards the mold 2 (vertically downwards), in order to prevent the tool suction head 1322 from colliding with the mold suction head 221, the second driving member 1331 pushes the push plate 1332 to move leftwards so as to avoid the tool suction head 1322 when moving downwards (power transmission path: the second driving member 1331 → the push plate 1332 → the push block 1325 → the tool suction head 1322 and the connecting member 1323, at this time, the spring 1324 is in a compressed state); when the downward movement is in place, namely the suction part of the tooling suction head 1322 and the die suction head 221 are positioned on the same horizontal line, the second driving member 1331 pushes the push plate 1332 to move rightward to transfer the material (power transmission path: second driving member 1331 → push plate 1332 → spring 1324 → connecting piece 1323 and tooling suction head 1322); the material is close to the suction head 221 of the mould; at this time, the tooling suction head 1322 is disconnected from the gas source to release the thin material 3, and the die suction head 221 is opened to suck the thin material 3, so that the thin material 3 is transferred from the tooling suction head 1322 to the die suction head 221.

The second driving piece 1331 pushes the push plate 1332 to move leftwards for a certain distance, a gap for avoiding interference is reserved between the suction part of the tool suction head 1322 and the die suction head 221 (if the probability of interference is very small, the left movement is not needed), and the manipulator drives the manipulator tool 1 to move (vertically upwards) in a direction away from the die 2; moving to the position above the thin material 3; then the second driving piece 1331 pushes the push plate 1332 to move rightwards for a certain distance, so that the tooling suction head 1322 is positioned at the secondary back pressure position a (at this time, the tooling suction head 1322 is positioned right above the thin material 3 and is attached to or close to the upper surface), and meanwhile, the ejection correction unit 23 arranged on the die 2 enables the correction block 233 to be ejected upwards (at this time, the correction block 233 is positioned right below the thin material 3 and is attached to or close to the lower surface); the tooling suction head 1322 and the correcting block 233 respectively act on the upper end and the lower end of the thin material 3, and position correction of the thin material 3 placed on the side surface on the die suction head 221 is completed in a matching manner.

In conclusion, the manipulator tool and the die are cooperatively matched, so that the position of the material in the die can be corrected before die assembly and injection molding, and the position precision of the material and the yield of the injection molded product are improved; the device is particularly suitable for correcting the position of thin materials laterally placed in a die.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A method for correcting the position of a material in a mold, the method comprising:

s1, a material placing unit in the manipulator tool absorbs materials;

s2, releasing and transferring the material to a mold suction head of a mold by the material placing unit;

2. The method for correcting the position of the in-mold material according to claim 1, further comprising a step S20 performed after the step S1 and before the step S2;

3. The method for correcting the position of an in-mold material according to claim 2, further comprising:

s5, carrying out die assembly and injection molding;

4. The method for correcting the position of an in-mold material according to claim 1, wherein the mold is horizontally disposed; the material placing unit moving to the secondary back pressure position is located above the material, and the ejection correction unit is located below the material.

5. The method for correcting the position of the material in the mold according to claim 2, wherein the manipulator tool is connected with a manipulator, and the manipulator is used for realizing the transportation of the material and the matched mold injection product;

6. The method as claimed in claim 5, wherein the product removing unit comprises a first driving member disposed on the first mounting plate, a second mounting plate is disposed on a power output portion of the first driving member, and a suction cup assembly for picking and placing the matched mold injection product is mounted on the second mounting plate.

7. The method for correcting the position of the material in the mold according to claim 5, wherein the material placing unit comprises a third mounting plate connected with the first mounting plate, and a suction head mechanism and a power mechanism for taking and placing the material are arranged on the third mounting plate; the power mechanism is used for driving at least one sucker mechanism to move.

8. The method for correcting the position of the material in the mold according to claim 7, wherein the power mechanism comprises a driving assembly and a sliding rail assembly;

9. The method for correcting the position of the material in the mold according to claim 8, wherein the suction head mechanism comprises a mounting seat fixed on the back of the third mounting plate, a tool suction head is slidably mounted in the mounting seat, and a suction part of the tool suction head extends out of the third mounting plate;

10. The method for correcting the position of a material in a mold according to claim 1, wherein the mold comprises a body and a mold block provided on the body, the mold block having the mold nozzle mounted thereon;