CN108568940B

CN108568940B - Self-locking type sliding block structure for double-color forming

Info

Publication number: CN108568940B
Application number: CN201710778615.0A
Authority: CN
Inventors: 周祝龙
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2017-09-01
Filing date: 2017-09-01
Publication date: 2020-04-07
Anticipated expiration: 2037-09-01
Also published as: CN108568940A

Abstract

The invention belongs to the technical field of automobile lamp injection molds, and provides a self-locking sliding block structure for double-color molding, which aims to solve the technical problem that when a sliding block adopts an oil cylinder to realize a self-locking function, the oil cylinder occupies a large space and is difficult to adopt on a small and medium mold. According to the invention, the double-color forming structure is used for replacing the oil cylinder, so that the cost is reduced, the reliability of the mechanism is improved, the structural design under the condition of smaller space can be met, the application range is greatly expanded, and the service life of the die is prolonged.

Description

Self-locking type sliding block structure for double-color forming

Technical Field

The invention belongs to the technical field of automobile lamp injection molds, and particularly relates to a self-locking sliding block structure for double-color molding.

Background

At the present stage of the rapid development of the mold industry, people try to innovate a more reliable and more effective mold structure, can realize the smooth demolding of products, and simultaneously reduce the defects of the products to the maximum extent. The sliding block is a structure with higher use frequency in the design of a die, and particularly can realize double-color forming. The use of ordinary slider, second grade slider and slider in the mould makes the structure of mould abundanter, and the mould tends to the high-end more.

At present, structures capable of realizing double-color forming of the sliding block are multiple, for example, an oil cylinder is used for controlling the action of the sliding block, or an inclined guide post is used for driving the sliding block, and the like, but the structures tend to be traditional, and have certain defects, such as no self-locking mechanism. For most of the existing sliders, the inclined wedge portion of the slider is an important part in the slider structure design, but the inclined surface of the slider is usually used for matching with the slider, so that the slider tends to be in a locked state, which may cause defects of a molded product due to insufficient locking force of the matching surface during the injection molding process.

The oil cylinder is adopted to drive the sliding block in the utility model of 'an oil cylinder sliding block self-locking structure' invented by Zhu Jiaohua, the self-locking function of the sliding block is realized through the self-locking block and the pull rod, the structure is compact, the sliding block can realize the self-locking of the die in a die closing state, but the cost of the oil cylinder structure is high, the risks of oil leakage, insufficient oil pressure and the like exist, and the automation degree is not high enough. The oil cylinder mechanism occupies a large space and is difficult to meet the condition of insufficient design space of small and medium dies.

Disclosure of Invention

The invention provides a self-locking sliding block structure for double-color molding, which aims to solve the technical problem that an oil cylinder occupies a large space and is difficult to adopt on a medium-sized and small mold when a sliding block adopts oil cylinder drive to realize a self-locking function.

The technical scheme adopted by the invention is as follows:

a self-locking type sliding block structure for double-color forming comprises a sliding block body, a pulling block, a triangular seat, a guide device, a limiting device, a self-locking device and a driving device, wherein the triangular seat is arranged at the front end of the sliding block body, the pulling block is positioned at the lower part of the sliding block body, a T-shaped block is arranged at the lower part of the sliding block body, a dovetail groove matched with the T-shaped block is formed in the upper part of the pulling block, one side of the T-shaped block is fixed on the sliding block body, and the other side of the T-shaped block is arranged in the dovetail groove in; the pull block is positioned on the cover plate and can slide back and forth along the cover plate under the action of external force;

the pull block and the cover plate are provided with limiting devices, each limiting device comprises limiting blocks, a tiger buckle and a pin, the limiting blocks are arranged on the left side and the right side of the pull block and on the cover plate and used for limiting the stroke of the pull block, the tiger buckle is arranged on the lower portion of the pull block, the pin is arranged on the cover plate, and after the die is closed for the first time, the pin is matched with the tiger buckle to prevent the pull block from moving back and forth;

the driving device comprises a first driving device for first color forming and a second driving device for second color forming, the first driving device comprises a first inclined wedge and a first shifting block, the first inclined wedge is arranged at the rear part of the pulling block, the first shifting block is arranged at the lower part of the first inclined wedge, the first shifting block pushes the pulling block to move forwards when the die is closed for the first time, the second driving device comprises a second inclined wedge, a second shifting block, a pressing plate, a spring and a pressing plate, the spring and the pressing plate are arranged on the left side and the right side of the rear part of the pulling block, the spring is positioned between the pressing plate and the pressing plate, the second shifting block is arranged at the lower part of the second inclined wedge, guide grooves which are inclined backwards are longitudinally formed in the left side and the right side of the second shifting block, and the second shifting block pushes the pressing plate to retreat when the die is closed for the second time, so that the pressing plate;

the front side surfaces of the inclined wedge I and the inclined wedge II are respectively provided with a self-locking device, the self-locking device comprises a self-locking block, a spring and a limiting screw, the spring and the limiting screw are arranged on the upper portion of the self-locking block, the limiting screw is arranged on the left side and the right side of the spring, and after the die is closed, the contact surface of the pulling block and the self-locking block is perpendicular to the movement direction of the pulling block.

The triangular seat is provided with a guide strip on the surface opposite to the front end of the sliding block body, and the front end of the sliding block body is provided with a guide groove matched with the guide strip.

The upper part of the cover plate is provided with a guide block along the front-back moving direction of the pull block, the lower part of the pull block is provided with a guide groove matched with the width of the guide block, the length of the guide groove is greater than that of the guide block, and the guide block is arranged in the guide groove at the lower part of the pull block.

The adjusting pieces are arranged on the cover plate at intervals along the front-back moving direction of the pulling block, the adjusting pieces are arranged on the left side and the right side of the pulling block, and the vertical distance between the left adjusting piece and the right adjusting piece is matched with the width of the pulling block.

And the front part of the pull block is provided with a limit nail, and after the die is closed, the limit nail is abutted against the triangular seat.

The invention has the beneficial effects that:

(1) according to the invention, the double-color forming structure is used for replacing the oil cylinder, so that the cost is reduced, the reliability of the mechanism is improved, the structural design under the condition of smaller space can be met, the application range is greatly expanded, and the service life of the die is prolonged.

(2) The invention is suitable for a double-color injection mold, and is particularly suitable for the condition that the first color needs the slide block to seal the glue and the second color needs to participate in the molding. When double colors are formed, the tiger buckle limiting mechanism below the pull block forces the sliding block formed in the first color to be in a static state, so that the defects that the sliding block and a splicing line are uneven due to reciprocating motion of a common sliding block are overcome, and the stability of an injection product is ensured.

(3) The self-locking sliding block structure provided by the invention can ensure the static state of the sliding block, solves the problem that the sliding block is stressed and retreats due to the stress of the inclined wedge inclined plane of the common sliding block, and ensures the stability and reliability of the sliding block in the injection molding process.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a view of the slide block after the mold is opened;

FIG. 4 is a schematic view of a self-locking structure of a slider;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a schematic view of a slide block structure when the mold is closed;

FIG. 7 is a schematic diagram of the movement of the slider during the first color forming;

FIG. 8 is a schematic diagram of the slider movement during the second color forming;

FIG. 9 is a schematic view of a pull block limiting device;

in the figure, 112-first poking block, 201-adjusting block, 202-triangular seat, 203-sliding block body, 204-second inclined wedge, 205-cover plate, 206-pulling block, 207-T-shaped block, 209-spring, 210-limiting screw, 211-self-locking block, 212-second poking block, 213-pressing plate, 214-pressing plate, 215-spring, 216-pin, 217-guide block, 218-tiger buckle, 219-limiting block, 220-adjusting block, 221-limiting nail and 222-guide strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, 2 and 3, a self-locking slider structure for two-color molding comprises a slider body 203, a pull block 206, a triangular seat 202, a guide device, a limiting device, a self-locking device and a driving device, wherein the triangular seat 202 is arranged at the front end of the slider body 203, the pull block 206 is positioned at the lower part of the slider body 203, a T-shaped block 207 is arranged at the lower part of the slider body 203, a dovetail groove matched with the T-shaped block 207 is arranged at the upper part of the pull block 206, one side of the T-shaped block 207 is fixed on the slider body 203, the other side of the T-shaped block 207 is arranged in the dovetail groove at the upper part of the pull block 206, the pull block 206 is positioned on a cover plate 205, and the pull block 206 can slide back and; the sliding block body 203 is matched with the pull block 206 and the triangular seat 202 through the T-shaped block 207 to complete a guiding action, and the pull block 206 is matched with the sliding block body 203 through the T-shaped block 207 fixed on the sliding block body 203 and drives the sliding block body 203 to move while moving; in addition, a guide strip 222 is arranged on the surface of the triangular seat 202 opposite to the front end of the slider body 203, a guide groove matched with the guide strip 222 is arranged at the front end of the slider body 203, and the guide strip 222 is designed on the triangular seat 202 and used for guiding the slider body 203 and ensuring the smooth movement of the slider body 203.

As shown in fig. 2 and 9, the pull block 206 and the cover plate 205 are designed with a limiting device for ensuring a precise moving distance of the pull block 206, the limiting device includes a limiting block 219, a slot 218 and a pin 216, the limiting block 219 is respectively disposed on the left and right sides of the pull block 206 and the cover plate 205 for limiting a stroke of the pull block 206, so that the driving mechanism can be accurately matched with the pull block 206. The slot 218 is arranged at the lower part of the pull block 206, the pin 216 matched with the slot 218 is arranged on the cover plate 205, and after the mould is closed for the first time, the pin 216 is matched with the slot 218 to prevent the pull block 206 from moving back and forth. After the mold is opened after the first color molding, the slider body 203 needs to remain stationary, and at this time, the pull block 206 remains stationary under the action of the snap 218 and the pin 216, and the driving device is not related to the pull block 206.

As shown in fig. 2, the upper portion of the cover plate 205 is further provided with a guide block 217 along the forward and backward movement direction of the pull block 206, the lower portion of the pull block 206 is provided with a guide groove matched with the width of the guide block 217, the length of the guide groove is greater than that of the guide block 217, the guide block 217 is arranged in the guide groove at the lower portion of the pull block 206, the guide block 217 is used for ensuring accurate guide of the pull block 206 in the movement process, in addition, in order to adjust errors caused by the relation of processing accuracy, a plurality of tabs 220 are further arranged between the pull block 206 and the cover plate 205, the tabs 220 are arranged at intervals along the forward and backward movement direction of the pull block 206, the tabs 220 are arranged at the left and right sides of the pull block 206, and the vertical distance between the left and right tabs 220 is matched with.

In order to better ensure the accurate moving distance of the pull block 206, a limit pin 221 is arranged at the front part of the pull block 206, and after the mold is closed, the limit pin 221 abuts against the triangular seat 202.

As shown in fig. 7 and 8, the driving device comprises a first driving device for first color molding and a second driving device for second color molding, the first driving device comprises a first inclined wedge and a first shifting block 112, the first inclined wedge is arranged at the rear part of the pulling block 206, the first shifting block 112 is arranged at the lower part of the first inclined wedge, when the mold is firstly closed, the first inclined wedge drives the first shifting block 112 to move downwards, the first shifting block 112 pushes the pulling block 206 to move forwards, meanwhile, the pulling block 206 drives the slider body 203 to move, so that the slider closing action is completed, after the mold is firstly molded, the first inclined wedge, the first shifting block 112 and the like are separated from the pulling block 206 along with the movement of the fixed mold, and the pulling block 206 is in a static state due to the action of the tiger buckle 218 and the pin 216. The second driving device comprises a second slanting wedge 204, a second shifting block 212, a pressing plate 213, a spring and a pressing plate 214, the second slanting wedge 204 is arranged at the rear part of the pulling block 206, the second shifting block 212 is arranged at the lower part of the second slanting wedge 204, guide grooves inclining backwards are longitudinally arranged on the left and right side surfaces of the second shifting block 212, the pressing plate 213, the spring and the pressing plate 214 are arranged on the left and right sides of the rear part of the pulling block 206, the spring is positioned between the pressing plate 213 and the pressing plate 214, the second slanting wedge 204 drives the second shifting block 212 to move downwards when the mold is closed for the second time, and when the second shifting block 212 meets the pressing plate 214 on the pulling block 206, the second shifting block 212 pushes the pressing plate 214 to retreat, and the pressing plate 214 is forced to cross the guide grooves; then the pressing sheet 214 is restored to the original state under the action of the spring, and the mold closing action of the mold is completed. After the second color molding, the mold is opened, the second shifting block 212 collides with the pressing sheet 214 in the rising process, so that the pressing sheet 214 is forced to move in the guide groove of the second shifting block 212, the pulling block 206 is driven to move backwards, and the core pulling action of the slider body 203 is completed.

As shown in fig. 4, 5 and 6, a self-locking device is respectively arranged on the front side surfaces of the first inclined wedge 204 and the second inclined wedge 204, the self-locking device comprises a self-locking block 211, a spring 209 and a limit screw 210, the spring 209 and the limit screw 210 are arranged on the upper portion of the self-locking block 211, the limit screw 210 is arranged on the left side and the right side of the spring 209, and the self-locking block 211 can realize a self-locking function after the mold is closed. When the mold is closed, the self-locking block 211 designed on the first inclined wedge 204 and the second inclined wedge 204 is in an extending state, the self-locking block 211 moves together with the first shifting block 112 and the second shifting block 212 along with the closing of the mold, when the self-locking block 211 contacts with the inclined plane of the pull block 206, the self-locking block 211 is stressed and moves upwards, after the self-locking block 211 crosses the inclined plane of the pull block 206, the self-locking block is finally restored to an initial state due to the fact that only the spring force is applied, and after the mold is closed, the contact surface of the pull block 206 and the self-locking block 211 is perpendicular to the moving direction of the pull block 206; the sliding block is guaranteed not to retreat under the injection pressure of the mold cavity, and therefore the reliability of the structure is guaranteed. In addition, after the mold is opened, the self-locking block 211 is provided with a certain gap between the first shifting block 112, the second shifting block 212 and the pressing sheet 214, so that the self-locking block 211 can be smoothly released, and the reliability of the sliding block structure is ensured.

The invention realizes the self-locking function of the sliding block structure by utilizing the mechanical self-locking principle, and simultaneously realizes the double-color forming function by utilizing the mechanical relative motion. The movement of the sliding block is controlled by matching the shifting block with the side elastic structure, namely, the sliding block is in a static state after the first color molding and is separated from the buckling position after the second color molding during the double-color injection molding. When the mold is closed, the shifting block is matched with the elastic self-locking mechanism on the inclined wedge to realize self-locking of the sliding block, so that the phenomenon that the sliding block retreats due to the pressure of a cavity or other factors in the injection molding process is prevented, the structure also meets the common sliding block structure, and a larger space such as an oil cylinder is not needed. Meanwhile, each accessory is convenient to process, easy to replace, capable of well controlling cost, wide in applicability and capable of guaranteeing product quality.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a from locking-type slider structure for double-colored shaping which characterized in that: the sliding block comprises a sliding block body (203), a pulling block (206), a triangular seat (202), a guiding device, a limiting device, a self-locking device and a driving device, wherein the triangular seat (202) is arranged at the front end of the sliding block body (203), the pulling block (206) is positioned at the lower part of the sliding block body (203), a T-shaped block (207) is arranged at the lower part of the sliding block body (203), a dovetail groove matched with the T-shaped block (207) is formed in the upper part of the pulling block (206), one side of the T-shaped block (207) is fixed on the sliding block body (203), and the other side of the T-shaped block is arranged in the dovetail groove in the upper part of the pulling block; the pull block (206) is positioned on the cover plate (205), and the pull block (206) can slide back and forth along the cover plate (205) under the action of external force;

limiting devices are arranged on the pull block (206) and the cover plate (205), each limiting device comprises a limiting block (219), a tiger buckle (218) and a pin (216), the limiting blocks (219) are arranged on the left side and the right side of the pull block (206) and the cover plate (205) and used for limiting the stroke of the pull block (206), the tiger buckle (218) is arranged on the lower portion of the pull block (206), the pin (216) is arranged on the cover plate (205), and after the mold is closed for the first time, the pin (216) is matched with the tiger buckle (218) to prevent the pull block (206) from moving back and forth;

the driving device comprises a first driving device for first color molding and a second driving device for second color molding, the first driving device comprises a first inclined wedge and a first shifting block (112), the first inclined wedge is arranged at the rear part of a pulling block (206), the first shifting block (112) is arranged at the lower part of the first inclined wedge, the first shifting block (112) pushes the pulling block (206) to move forwards when a mold is closed for the first time, the second driving device comprises a second inclined wedge (204), a second shifting block (212), a pressing plate (213), a spring (215) and a pressing plate (214), the pressing plate (213), the spring (215) and the pressing plate (214) are arranged at the left side and the right side of the rear part of the pulling block (206), the spring (215) is positioned between the pressing plate (213) and the pressing plate (214), the second inclined wedge (204) is arranged at the rear part of the pulling block (206), the second shifting block (212) is arranged at the lower part of the second inclined wedge (204), and guide grooves which are longitudinally backwards inclined are arranged on the left side and the right side of the shifting block (212), when the die is closed for the second time, the second shifting block (212) pushes the pressing sheet (214) to retreat, so that the pressing sheet (214) is forced to cross the guide groove on the second shifting block (212);

the front sides of the first inclined wedge and the second inclined wedge (204) are respectively provided with a self-locking device, the self-locking device comprises a self-locking block (211), a spring (209) and a limiting screw (210), the spring (209) and the limiting screw (210) are arranged on the upper portion of the self-locking block (211), the limiting screw (210) is arranged on the left side and the right side of the spring (209), and after the mold is closed, the contact surface of the pull block (206) and the self-locking block (211) is perpendicular to the movement direction of the pull block (206).

2. The self-locking type sliding block structure for double-color molding according to claim 1, characterized in that: a guide strip (222) is arranged on the surface, opposite to the front end of the sliding block body (203), of the triangular seat (202), and a guide groove matched with the guide strip (222) is formed in the front end of the sliding block body (203).

3. The self-locking type sliding block structure for double-color molding according to claim 1, characterized in that: the upper portion of the cover plate (205) is provided with a guide block (217) along the front-back moving direction of the pull block (206), the lower portion of the pull block (206) is provided with a guide groove matched with the width of the guide block (217), the length of the guide groove is larger than that of the guide block (217), and the guide block (217) is arranged in the guide groove in the lower portion of the pull block (206).

4. The self-locking type sliding block structure for double-color molding according to claim 1, characterized in that: a plurality of adjusting sheets (220) are arranged on the cover plate (205) at intervals along the front-back moving direction of the pulling block (206), the adjusting sheets (220) are arranged on the left side and the right side of the pulling block (206), and the vertical distance between the left adjusting sheet and the right adjusting sheet (220) is matched with the width of the pulling block (206).

5. The self-locking type sliding block structure for double-color molding according to claim 1, characterized in that: the front part of the pull block (206) is provided with a limit nail (221), and after the die is closed, the limit nail (221) is abutted against the triangular seat (202).