CN216782530U

CN216782530U - Internal thread lateral rotation core-pulling mechanism

Info

Publication number: CN216782530U
Application number: CN202122903365.3U
Authority: CN
Inventors: 熊友家; 陈杰; 叶伟; 李忠阳; 伍建
Original assignee: Suzhou Aifute Precision Mould Co ltd
Current assignee: Suzhou Aifute Precision Mould Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-21
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses an internal thread lateral rotation core pulling mechanism, which comprises a motor, a gear set, a fixed block, a screw rod, a bushing and a core, wherein the fixed block is fixed in a movable die plate; the gear train comprises driving gear and two driven gears that the size is the same, and two driven gears mesh respectively and connect in the both sides of driving gear, and the output shaft and the driving gear of motor are connected, and the gear is installed to the one end of the relative core of lead screw, and the gear is connected with the driven gear meshing that corresponds. The mechanism adopts the ball screw pair to convert the rotary motion of the screw into linear motion, has high running precision, reduces the shake of the screw and the mold core during the rotary translation, improves the demolding precision and the molding precision of products, and is suitable for the molding and demolding of precise and thin-wall products.

Description

Internal thread lateral rotation core-pulling mechanism

Technical Field

The utility model belongs to the technical field of injection molds, and relates to an internal thread lateral rotation core-pulling mechanism.

Background

Internal thread features in plastic parts are typically demolded using a rotary core-pulling mechanism. The general rotary core pulling mechanism mainly comprises an oil cylinder, a rack and a gear, wherein the oil cylinder drives the rack to translate, the rack drives the gear to rotate and translate, and a core fixedly connected to the gear completes rotation and retreating actions, so that the core pulling mechanism is withdrawn from a plastic part to complete core pulling. However, the rack and pinion transmission is not high in precision, and is not suitable for side core pulling of precision products or thin-wall products, and is not suitable for simultaneous opposite core pulling of two products, so that the existing rotary core pulling mechanism needs to be improved.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: provided is a rotary core-pulling mechanism which has high use precision and can be suitable for two products and can pull cores oppositely.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

the internal thread lateral rotation core pulling mechanism comprises a motor, a gear set, a fixing block, a screw rod, a bushing and a core, wherein the fixing block is fixed in a movable die plate, the bushing is installed at the position, corresponding to a cavity of each product, of the fixing block, the screw rod is installed in the bushing, and the core for forming the internal thread is fixedly arranged at one end of the screw rod; the gear set is composed of a driving gear and two driven gears which are the same in size, the two driven gears are respectively connected to the two sides of the driving gear in a meshed mode, an output shaft of the motor is connected with the driving gear, a gear is installed at one end, opposite to the core, of the screw rod, and the gear is connected with the corresponding driven gears in a meshed mode.

Compared with the prior art, the utility model has the beneficial effects that:

1. the power of the motor is output through the gear set, so that the products in the two cavities can be simultaneously driven to complete the demoulding of the internal thread characteristics, the mould structure is simplified, and the mould cost is reduced;

2. the ball screw pair is adopted to convert the rotary motion of the screw into linear motion, the running precision is high, the shaking of the screw and the mold core during rotary translation is reduced, the demolding precision and the molding precision of the product are improved, and the method is suitable for molding and demolding precise and thin-walled products.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic view of a rotary core-pulling mechanism;

fig. 2 is a schematic view of the installation of the core and the screw.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Examples

The rotary core-pulling mechanism shown in fig. 1 comprises a motor 10, a gear set, a fixed block 20, a screw rod 30, a bushing 40 and a core 50, wherein the mechanism is applied to a mold, the fixed block 20 is fixed in a movable mold plate, the bushing 40 is installed at the position, corresponding to a cavity of each product, of the fixed block 20, the screw rod is installed in the bushing, and the core 50 for forming internal threads is fixedly arranged at one end of the screw rod. The gear train comprises driving gear 60 and two driven gear 70 that the size is the same, and two driven gear mesh respectively connect in the both sides of driving gear, and the output shaft and the driving gear 60 of motor are connected, and gear 80 is installed to the one end of the relative core of lead screw 30, and gear 80 is connected with the driven gear 70 meshing that corresponds. The two gears 80 rotate relatively, so that the rotational demolding directions of the two products are opposite, and two cavities in the mold need to be arranged side by side and symmetrically. The power of the motor is output through the gear set, so that products in the two cavities can be driven to complete the demolding of the internal thread characteristics, and the mold structure is simplified.

The motor and the gear set are arranged on the outer side of the die, so that the occupation of the space of the die plate can be reduced, and the cost of the die is reduced. A guide sleeve is arranged in the motor fixing seat 90 arranged outside the movable die, and one end of the screw rod 30 opposite to the core penetrates through the guide sleeve to be guided.

Preferably, the driving gear 60 is fixed to a side of the motor fixing base 90. A base 100 is arranged between the fixed block 20 and the motor fixing seat 90, the driven gear is arranged between the motor fixing seat and the base, and a rotating shaft of the driven gear is inserted into bearings of the motor fixing seat 90 and the base 100. The screw rod 30 rotates to retreat to the outer side of the die, and the gear and the driven gear are meshed and rotate and simultaneously move backwards or forwards linearly, so that both ends of the driven gear are fixedly supported to prevent the driven gear from deviating to influence the meshing precision of the driven gear and the gear.

Preferably, each of the lead screws in the fixed die is provided with a limiting block 110, a U-shaped limiting groove is formed in each limiting block 110, one side of each limiting block is connected with the side face of the fixed block in a die closing state, the lead screws are clamped in the U-shaped limiting grooves, and the limiting blocks on the lead screws abut against the side faces of the limiting blocks, so that the position of the mold core 50 in the die can be effectively controlled, and the forming precision of a workpiece is improved.

Referring to fig. 2, a cross-shaped mounting groove 31 is formed in one side of the screw rod corresponding to the mold core by adopting a slow wire cutting process, a cross-shaped mounting boss matched with the mounting groove 31 is arranged at the end part of the mold core 50, and the screw rod is connected with the mounting boss by adopting a square key. The mold core and the screw rod are installed in a matched mode through the cross-shaped structure, and installation accuracy of the mold core 50 and the screw rod 30 is improved.

In summary, the rotary demolding mechanism in the embodiment has the following beneficial effects:

1. the power of the motor is output through the gear set, so that two products which want to rob inside can be driven to complete the demoulding of the internal thread characteristic, the mould structure is simplified, and the mould cost is reduced;

Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The internal thread lateral rotation core pulling mechanism is characterized by comprising a motor (10), a gear set, a fixing block (20), a screw rod (30), a bushing (40) and a core (50), wherein the fixing block (20) is fixed in a movable die plate, the bushing (40) is installed at the position, corresponding to a cavity of each product, of the fixing block, the screw rod (30) is installed in the bushing (40), and the core (50) for forming the internal thread is fixedly arranged at one end of the screw rod (30); the gear train comprises driving gear (60) and two driven gear (70) that the size is the same, two driven gear (70) meshing respectively connect in the both sides of driving gear (60), the output shaft of motor (10) with driving gear (60) are connected, lead screw (30) are relative gear (80) are installed to the one end of core (50), the gear is connected with the driven gear meshing that corresponds.

2. The internal thread lateral rotation core pulling mechanism according to claim 1, wherein a cross-shaped installation groove (31) is formed in one side, corresponding to the core, of the screw rod (30) through a slow wire cutting process, a cross-shaped installation boss matched with the installation groove is arranged at the end of the core, and the screw rod is connected with the installation boss through a square key.

3. The internal thread lateral rotation core pulling mechanism according to claim 1, wherein a guide sleeve is arranged in a motor fixing seat (90) arranged outside a movable die, and one end of the screw rod (30) opposite to the core (50) penetrates out of the guide sleeve.

4. The internal thread lateral rotation core-pulling mechanism according to claim 3, characterized in that said driving gear (60) is fixed to the side of said motor fixing seat (90).

5. The internal thread lateral rotation core pulling mechanism according to claim 4, wherein a base (100) is arranged between the fixed block (20) and the motor fixing seat (90), the driven gear (70) is positioned between the motor fixing seat (90) and the base (100), and a rotating shaft of the driven gear (70) is inserted into bearings of the motor fixing seat (90) and the base (100).

6. The internal thread lateral rotation core pulling mechanism according to claim 1, wherein a limiting block (110) is arranged in the fixed die corresponding to each screw rod (30), a U-shaped limiting groove is arranged in the limiting block (110), one side of the limiting block (110) is connected with the side surface of the fixed block (20) in a die assembly state, the screw rod (30) is clamped in the U-shaped limiting groove, and the limiting block (110) on the screw rod (30) abuts against the side surface of the limiting block (110).