CN220031073U - Double core-pulling die outside die - Google Patents

Abstract

The utility model discloses a double core-pulling mold outside a mold, which comprises a fixed mold plate and a movable mold plate which are matched, wherein a fixed mold insert is arranged in the fixed mold plate, a movable mold insert is arranged in the movable mold plate, and the fixed mold insert and the movable mold insert are jointly surrounded to form a cavity in a mold closing state, and the double core-pulling mold is characterized in that: the automatic mold fixing device is characterized in that a servo motor is arranged in the fixed mold plate, a working shaft of the servo motor is connected with a limiting sleeve through a spline, a core screw is arranged at the end of the limiting sleeve, the core screw is located in a cavity and forms a part of the cavity in a mold closing state, a limiting step matched with the end face of the spline is arranged in the limiting sleeve, an external thread is further arranged on the outer wall of the limiting sleeve, a thread sleeve is arranged in the fixed mold plate, the thread sleeve is connected with the limiting sleeve through a thread, and meanwhile, the thread pattern between the thread on the core screw and the external thread is consistent.

Description

Double core-pulling die outside die

Technical Field

The utility model relates to the field of injection molds, in particular to a double core-pulling mold outside a mold.

Background

Injection molding is a common manufacturing process for products, in which a molding machine is used to inject a molten material into a cavity of a mold, and the material is cooled and solidified to form a desired plastic product. The injection molding process has the advantages of high production efficiency, low cost of single products and the like, and becomes the most main preparation process of plastic products.

In some plastic products, the surface of the plastic product needs to be provided with a counter bore with threads, when the production of the plastic product is carried out, a threaded insert is placed at a specific position of a cavity in advance, the insert and the product are taken out of the cavity integrally after the product is molded, and then the insert is screwed out of the product by a hand-held tool (a screwdriver or the like) of a worker, so that a subsequent process is additionally required, a certain amount of manual labor is required to be increased, and the production efficiency is seriously influenced.

In addition, some products need to perform side core pulling actions before demolding, the traditional side core pulling actions are mostly realized by utilizing inclined guide posts and inclined guide grooves on sliding blocks, namely, the movement in the mold opening direction is converted into linear movement perpendicular to the inclined guide posts/inclined guide groove mechanisms, but the large-stroke core pulling actions cannot be realized by the structure, and if the large-stroke core pulling actions are required to be realized, the mold itself needs to have enough volume, so that the manufacturing cost of the mold is greatly increased.

There is thus a need for a method or apparatus that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides the double-core-pulling grinding tool outside the die, which has the advantages of simple structure, ingenious design and reasonable layout, and can directly finish the screw thread removing action of the screw hole in the die opening process so as to achieve the purposes of saving working procedures, improving working efficiency and the like.

The technical scheme of the utility model is as follows: the utility model provides a two loose core moulds in mould outside, includes fixed die plate 1 and movable mould board 2 that match, be provided with fixed die insert 3 in the fixed die plate 1, be provided with movable die insert 4 in the movable mould board 2, under the compound die state, fixed die insert 3 and movable die insert 4 surround jointly and form the die cavity, its characterized in that: the fixed die plate 1 is internally provided with a servo motor 5, a working shaft of the servo motor 5 is in key connection with a limit sleeve 7 through a spline 6, the end part of the limit sleeve 7 is provided with a core screw rod 8, the core screw rod 8 is positioned in a cavity and forms a part of the cavity in a die closing state, the limit sleeve 7 is internally provided with a limit step 9 matched with the end surface of the spline 6, the outer wall of the limit sleeve 7 is also provided with an external thread 10, the fixed die plate 1 is internally provided with a thread bush 11, the thread bush 11 is in threaded connection with the limit sleeve 7, the thread pattern between the thread on the core screw rod 8 and the external thread 10 is consistent,

the movable mold plate 2 is provided with a core pulling oil cylinder 12, the working end of the core pulling oil cylinder 12 is connected with a sliding block 13, the sliding block 13 is connected with a side-pulling mold core 14, the side-pulling mold core 14 is positioned in a mold cavity and forms a part of the mold cavity in a mold clamping state, one side of the sliding block 13, which is used for side-pulling the mold core 14, is provided with a first locking inclined surface 15, and the bottom end surface of the fixed mold plate 1 is provided with a second locking inclined surface 16 matched with the first locking inclined surface 15.

Compared with the prior art, the utility model has the following advantages:

the utility model provides a two moulds of loosing core in mould outside of structural style, its simple structure, design benefit, it is rationally distributed, it is to traditional product with screw hole need add the various problems that a process that take out the screw insert and produce alone after the shaping, design a special structure, it is direct at the inside one set of mechanism that can realize automatic thread removal that sets up of mould, after the die sinking, the motor in this mechanism can drive core screw rod rotation, thereby realize the action of thread removal, it has still set up a long core that carries out driven through the hydro-cylinder simultaneously, utilize the hydro-cylinder to carry out the long stroke action of loosing core, can realize the operation of loosing core of large stroke under the prerequisite that does not increase mould itself volume. The double core-pulling mold outside the mold has various advantages, is particularly suitable for popularization and application in the field, and has very broad market prospect.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a partial enlarged view of an embodiment of the present utility model.

The mold comprises a fixed mold plate 1, a movable mold plate 2, a fixed mold insert 3, a movable mold insert 4, a servo motor 5, a spline 6, a limit sleeve 7, a core screw 8, a limit step 9, an external thread 10, a thread bush 11, a core-pulling cylinder 12, a slide block 13, a side-pulling core 14, a first locking inclined plane 15 and a second locking inclined plane 16.

Detailed Description

The following description of the embodiments of the utility model refers to the accompanying drawings, in which: as shown in fig. 1 and 2, the double core-pulling mold outside the mold comprises a fixed mold plate 1 and a movable mold plate 2 which are matched, wherein a fixed mold insert 3 is arranged in the fixed mold plate 1, a movable mold insert 4 is arranged in the movable mold plate 2, in a mold clamping state, the fixed mold insert 3 and the movable mold insert 4 are jointly surrounded to form a cavity, a servo motor 5 is arranged in the fixed mold plate 1, a working shaft of the servo motor 5 is in key connection with a limit sleeve 7 through a spline 6, the end part of the limit sleeve 7 is provided with a core screw rod 8, in the mold clamping state, the core screw rod 8 is positioned in the cavity and forms a part of the cavity, a limit step 9 matched with the end surface of the spline 6 is arranged in the limit sleeve 7, meanwhile, an external thread 10 is also arranged on the outer wall of the limit sleeve 7, a thread sleeve 11 is arranged in the fixed mold plate 1, the thread sleeve 11 is in threaded connection with the limit sleeve 7, meanwhile, the thread form between the thread on the core screw rod 8 and the external thread 10 is consistent,

the movable mold plate 2 is provided with a core pulling oil cylinder 12, the working end of the core pulling oil cylinder 12 is connected with a sliding block 13, the sliding block 13 is connected with a side-pulling mold core 14, the side-pulling mold core 14 is positioned in a mold cavity and forms a part of the mold cavity in a mold clamping state, one side of the sliding block 13, which is used for side-pulling the mold core 14, is provided with a first locking inclined surface 15, and the bottom end surface of the fixed mold plate 1 is provided with a second locking inclined surface 16 matched with the first locking inclined surface 15.

The working process of the double core-pulling mold outside the mold in the embodiment of the utility model is as follows: in the mold closing state, the fixed mold insert 3 and the movable mold insert 4 are surrounded together to form a cavity, at the moment, the core screw rod 8 and the side-drawing core 14 are both positioned in the cavity, a forming machine injects materials in a molten state into the cavity, a workpiece is formed after the materials are cooled, and as the core screw rod 8 and the side-drawing core 14 occupy a place in the cavity, a threaded hole is formed in a part of the workpiece corresponding to the core screw rod 8, and a long hole matched with the contour of the side-drawing core 14 is formed in a part corresponding to the side-drawing core 14;

after the die is opened, the fixed die plate 1 and the movable die plate 2 are separated, at the moment, the control system can control the servo motor 5 to work, the limiting sleeve 7 is driven to rotate through the spline 6, and because the outer wall of the limiting sleeve 7 is connected with the thread bush 11 through the external thread 10, the limiting sleeve 7 moves along the axial direction of the die under the action of the thread while rotating, the action of the limiting sleeve 7 can drive the core screw 8 arranged at the end part of the limiting sleeve to rotate and withdraw from a threaded hole formed in a workpiece, when the limiting step 9 arranged inside the limiting sleeve 7 contacts with the end surface of the spline 6, the limiting sleeve 7 stops moving, and at the moment, the core screw 8 is completely unscrewed from the threaded hole, and the action of thread release is realized;

at the same time of the above-mentioned movements, the control system will control the core-pulling cylinder 12 to work, drive the slide block 13 to move towards the direction far away from cavity, the slide block 13 drives the side-pulling core 14 to withdraw from the work piece, after the core-pulling cylinder 12 moves to the prescribed stroke, the side-pulling core 14 is separated from work piece, namely has realized the movement of side-pulling;

after the above-mentioned action is finished, the ejector plate is actuated, and the ejector rod connected with the ejector plate can eject the workpiece from the cavity so as to implement demoulding action.

Claims (1)

1. The utility model provides a mould outside two loose core moulds, includes fixed template (1) and movable mould board (2) that match, be provided with in fixed template (1) cover half insert (3), be provided with movable mould insert (4) in movable mould board (2), under the compound die state, cover half insert (3) and movable mould insert (4) surround jointly and form die cavity, its characterized in that: the utility model discloses a die cavity locking mechanism, which is characterized in that a servo motor (5) is arranged in a fixed die plate (1), a working shaft of the servo motor (5) is in key connection with a limit sleeve (7) through a spline (6), a core screw (8) is arranged at the end part of the limit sleeve (7), the core screw (8) is positioned in a die cavity and forms a part of the die cavity in a die closing state, a limit step (9) matched with the end surface of the spline (6) is arranged in the limit sleeve (7), an external thread (10) is also arranged on the outer wall of the limit sleeve (7), a thread sleeve (11) is arranged in the fixed die plate (1), threads on the thread sleeve (11) are in threaded connection with the limit sleeve (7), the thread on the core screw (8) is consistent with the tooth shape between the external thread (10), a core cylinder (12) is arranged on the movable die plate (2), the working end of the core cylinder (12) is connected with a slide block (13), a side core (14) is connected on the slide block (13), in the die closing state, the side core (14) is positioned in the die cavity (13) and forms a part of the first inclined surface (15), the bottom end face of the fixed template (1) is provided with a second locking inclined plane (16) matched with the first locking inclined plane (15).