CN211542210U - Core pulling mechanism and injection mold - Google Patents

Abstract

The utility model belongs to the technical field of injection molds, and discloses a core-pulling mechanism and an injection mold. The core-pulling mechanism is arranged in an injection mold having a fixed mold and a movable mold. an inclined guide post, and a travel seat that is slidably connected to the movable die and can be inserted into the inclined guide post, the travel seat includes a slider and a guide piece that is detachably connected to the slider, the The slider has a through hole that can avoid the inclined guide post, the guide piece has a guide hole inserted with the inclined guide post, and the guide hole communicates with the through hole. With the core-pulling mechanism provided by the utility model, the sliding block does not directly contact and rub against the inclined guide column during the mold opening and clamping process of the injection mold, which prolongs the service life of the sliding block, and the through holes provided in the sliding block do not directly contact and rub. It needs to be designed as an inclined hole adapted to the inclined guide post, which is easy to process, and the guide piece as a wearing part is detachably connected to the slider for easy replacement.

Description

A core pulling mechanism and an injection mold

technical field

The utility model relates to the technical field of injection moulds, in particular to a core pulling mechanism and an injection mould.

Background technique

The core-pulling mechanism of the inclined guide column mainly relies on the mold-opening force of the injection mold to realize parting and core-pulling. Specifically, please refer to FIG. 1, when the mold is closed, the inclined guide column 2 fixedly connected with the fixed mold (not shown in the figure) moves downward with the fixed mold, and is inserted into the row on the mold base 100 which is slidably connected to the movable mold. In the guide hole 121 inclined in the seat 1 (also known as the slider seat), the seat 1 is driven to slide to the right side in the figure, and the mold core 200 is clamped. When the mold is opened, the inclined guide post 2 moves upward with the fixed mold and leaves the guide hole 121 at the same time, drives the row seat 1 to slide to the left in the figure, and releases the mold core 200 . The structure is compact and the action is safe and reliable, so it is the most commonly used lateral parting and core-pulling mechanism for injection molds.

However, each time the injection mold is processed, the above-mentioned mold opening and closing operations are performed once. Over time, the guide holes 121 of the row seat 1 and the inclined guide posts 2 will wear out and need to be replaced regularly. Among them, the inclined guide column 2 is directly fixed on the fixed mold, which is convenient to replace, and its inclined structure is easy to process, only need to cut the bottom mounting surface, and the length of the travel seat 1 is generally equal to the length of the mold , not only the replacement cost is high, but also the guide hole 121 needs to be processed with larger equipment, which is difficult to process.

Utility model content

The purpose of the utility model is to provide a core-pulling mechanism and an injection mold, so as to solve the problems in the prior art that the inclined guide column core-pulling mechanism must periodically replace the row seat and the processing of the row seat is difficult.

In order to achieve this purpose, the utility model adopts the following technical solutions: a core-pulling mechanism, which is arranged in an injection mold with a fixed mold and a movable mold, and the core-pulling mechanism includes an inclined guide column fixedly connected with the fixed mold, and a row seat that is slidably connected to the movable die and can be inserted into the inclined guide post, the row seat includes:

a sliding block, the sliding block has a through hole that can avoid the inclined guide post;

and a guide piece detachably connected with the slider, the guide piece has a guide hole inserted with the inclined guide post, and the guide hole communicates with the through hole.

Preferably, the extending direction of the through hole is perpendicular or parallel to the machining reference plane of the slider.

Preferably, the guide piece is accommodated in a accommodating groove formed by concave inwards on the surface of the slider facing the fixed die.

Preferably, the through hole includes two staggered first hole sections and second hole sections, and the extension directions of the first hole sections and the second hole sections are both perpendicular to the bottom surface of the slider. The first hole segment communicates with the accommodating groove, and the second hole segment communicates with the lower surface of the slider.

Preferably, the thickness of the guide piece is equal to the depth of the accommodating groove.

Preferably, the guide piece is fixed on the upper surface of the slider.

Preferably, the through hole includes two staggered first hole sections and second hole sections, and the extension directions of the first hole sections and the second hole sections are both perpendicular to the bottom surface of the slider. The first hole segment communicates with the upper surface of the slider, and the second hole segment communicates with the lower surface of the slider.

Preferably, a side of the guide hole facing the fixed mold has a chamfer.

Preferably, the hole wall of the guide hole is provided with a wear-resistant layer.

The utility model also adopts the following technical scheme: an injection mold, comprising a fixed mold, a movable mold and the above-mentioned core pulling mechanism.

The beneficial effects of the present utility model:

1. In the core-pulling mechanism provided by the present invention, the slider used for fixing the core is driven to slide through the cooperation of the guide piece detachably connected with the oblique guide column, and the slider is both slidable during the opening and closing process of the injection mold. It does not directly contact with the inclined guide post, that is, there will be no friction loss with the inclined guide post, which prolongs the service life of the slider.

2. In the core pulling mechanism provided by the present invention, since the slider does not need to be mated with the oblique guide post during the opening and closing process of the injection mold, the position and shape of the through hole provided in the slider only need to meet the When the inclined guide post is inserted into the slider, the oblique guide post can be avoided, and the through hole can be a straight hole or a stepped hole with an extension direction perpendicular to or parallel to the machining reference plane of the slider, which makes it easy to process.

3. In the core-pulling mechanism provided by the present utility model, the guide piece as the wearing part is detachably connected with the slider, which is suitable for replacement, and the thickness and external dimensions of the guide piece can be much smaller than The shape and guide hole can be processed by ordinary three-axis machining center and other equipment, which reduces the processing difficulty of the row seat.

Description of drawings

Fig. 1 is the structural representation of the core pulling mechanism in the prior art;

Fig. 2 is the structural representation of the core pulling mechanism in the embodiment of the present invention;

3 is a schematic structural diagram of a guide piece in an embodiment of the present invention.

In the picture:

1. Position seat; 11. Slider; 111, accommodating groove; 12, guide plate; 121, guide hole; 122, chamfer; 13, through hole; 131, first hole segment; 132, second hole segment; 2. Inclined guide column;

100, a mold base; 200, a mold core.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or a fixed connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for convenience of description and simplified operation, rather than indicating Or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

Please refer to FIG. 2 and FIG. 3 , a core-pulling mechanism provided in an injection mold provided in this embodiment, the core-pulling mechanism includes a travel seat 1 and one or more fixed molds with the injection mold (not shown in the figure). shown) fixed inclined guide post 2. The row seat 1 includes a sliding block 11 slidably connected with the mold base 100 of the movable mold of the injection mold, and a guide piece 12 detachably connected with the sliding block 11 . Specifically, the sliding block 11 and the mold core 200 disposed next to it in the injection mold respectively have concave/convex structures that can be inserted or spliced with each other, and the sliding block 11 has a through hole 13 , and the guide piece 12 has a through hole 13 . 13 corresponds to the connected guide hole 121, the guide hole 121 penetrates the guide piece 12, and its inclination is adapted to the inclination of the inclined guide post 2, so that when the fixed die moves toward the movable die, the inclined guide post 2 can be inserted into the guide hole 121, and by driving the guide piece 12 to drive the slider 11 to slide along the preset positive trajectory, so as to fix the mold core 200, and when the fixed mold moves away from the movable mold, the inclined guide post 2 can move the seat 1, and The driving seat 1 is driven to slide along a preset reverse trajectory, thereby releasing the mold core 200 of the injection mold.

It should be noted that, since the guide piece 12 fixed to the slider 11 can drive the slider 11 to move under the action of the inclined guide column 2, the position and shape of the through hole 13 provided in the slider 11 only need to satisfy the When the inclined guide post 2 is inserted into the slider 11 , the inclined guide post 2 can be avoided. During the opening and closing process of the injection mold, the slider 11 does not directly contact the inclined guide post 2, that is, there is no friction loss with the inclined guide post 2, which greatly prolongs the service life. Preferably, the through hole 13 can be a straight hole or a stepped hole with an extension direction perpendicular to or parallel to the machining reference plane of the slider 11 , so as to make it easy to process. The guide piece 12, which is a wearing part, is detachably connected to the slider 11, which is convenient for replacement. Moreover, the thickness and external dimensions of the guide piece 12 can be much smaller than those of the row seat 1. The three-axis machining center and other equipment complete the processing.

Specifically, the core-pulling mechanisms can be arranged in pairs on both sides of the injection mold, and any core-pulling mechanism can include a row seat 1 and a plurality of inclined guide posts 2 , and the row seat 1 includes a The sliding block 11 with the same length has through holes 13 corresponding to the number of the inclined guide columns 2 , and a guide piece 12 is correspondingly arranged at each through hole 13 . Alternatively, any core-pulling mechanism may include a plurality of row seats 1 and a plurality of inclined guide posts 2 in the same number, and a through hole 13 is provided on the slider 11 of each row seat 1, and the plurality of row seats 1 along the The mold cores 200 are arranged at intervals in the longitudinal direction, and a guide piece 12 is correspondingly arranged at each through hole 13 . The side of the guide hole 121 facing the fixed mold may have a chamfer 122 to facilitate the insertion of the oblique guide post 2 into the guide hole 121 . In addition, the hole wall of the guide hole 121 can be coated to form a wear-resistant layer such as chromium-based metal to prolong its service life.

In an optional embodiment, the guide piece 12 may be fixed on the upper surface of the slider 11 , that is, it is provided on the slider 11 bare, which is convenient for regular replacement and maintenance. At the same time, the guide piece 12 is located on the upper surface of the slider 11. Compared with the guide piece 12 being arranged at the middle and lower parts of the slider 11, the guide piece 12 can be mated with the inclined guide post 2 earlier in the mold clamping process. , and is separated from the inclined guide post 2 later in the mold opening process, which prolongs the action time of the travel seat 1 and the inclined guide column 2, so that the travel seat 1 can obtain a larger sliding stroke, and can be adjusted according to the actual situation. The required sliding stroke reduces the thickness of the slider 11 . In this embodiment, the through hole 13 may include two first hole segments 131 and second hole segments 132 staggered along the direction in which the oblique guide post 2 is inserted into the slider 11 , so as to avoid the oblique guide post 2 . The extension directions of the first hole segment 131 and the second hole segment 132 may be perpendicular to the bottom surface of the slider 11 , and the first hole segment 131 communicates with the upper surface of the slider 11 , and the second hole segment 132 communicates with the bottom surface of the slider 11 . Therefore, when machining the slider 11, the first hole segment 131 and The second hole segment 132 does not need to machine an inclined hole. Replacing the straight through holes with the staggered first hole segment 131 and the second hole segment 132 can minimize the structural loss of the slider and maintain its structural strength.

In another optional embodiment, an upper surface of the slider 11, that is, the surface of the slider 11 facing the fixed die, may be processed with a groove 111 that is contoured to the guide piece 12, and the guide piece 12 is embedded in the guide piece 12. The guide plate 12 and the slider 11 are fixedly connected by fasteners such as screws. Even after long-term plug-and-match with the inclined guide post 2, the fasteners fixing the guide piece 12 will not fail due to being pushed and pulled radially for a long time, and the guide piece 12 will not move due to this. In this embodiment, the through hole 13 also includes two staggered first hole segments 131 and second hole segments 132 , and the extension directions of the first hole segments 131 and the second hole segments 132 are both perpendicular to the bottom surface of the slider 11 , The first hole segment 131 communicates with the receiving groove 111 , and the second hole segment 132 communicates with the lower surface of the slider 11 . For the row seats 1 that fail due to the wear of the internal inclined guide holes, the grooves 111 with the same depth as the thickness of the guide plate 12 can be machined on these row seats 1, and the above-mentioned through hole 13 structure can be processed correspondingly. After the guide pieces 12 are embedded in the grooves 111 of these row seats 1, the upper surface of the guide pieces 12 can be flush with the upper surface of the slider 11, that is, during the mold opening and closing process, the guide pieces 12 can make these The row seat 1 can maintain its original designed sliding stroke, so that it can be reused in the original mold.

This embodiment also provides an injection mold, including a fixed mold, a movable mold, and the above-mentioned core pulling mechanism. By configuring the above-mentioned core-pulling mechanism, the downtime of the mold caused by the overall replacement of the row seat 1 and other structures can be reduced, and the work difficulty of maintenance personnel can be reduced.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a mechanism of loosing core sets up in the injection mold who has cover half and movable mould, the mechanism of loosing core include with oblique guide pillar (2) that the cover half links firmly, and with movable mould sliding connection and can with line position seat (1) of oblique guide pillar (2) grafting, its characterized in that, line position seat (1) includes:

the sliding block (11) is provided with a through hole (13) capable of avoiding the inclined guide post (2); and

the guide piece (12) is detachably connected with the sliding block (11), the guide piece (12) is provided with a guide hole (121) which is inserted into the inclined guide post (2), and the guide hole (121) is communicated with the through hole (13).

2. Core pulling mechanism according to claim 1, characterized in that the direction of extension of said through hole (13) is perpendicular or parallel to a machining reference plane of said slider (11).

3. Core pulling mechanism according to claim 1, characterized in that said guide tab (12) is housed in a housing groove (111) formed by the inward concavity of the surface of said slider (11) facing the stationary mold.

4. The core pulling mechanism according to claim 3, wherein the through hole (13) comprises two staggered first and second hole segments (131, 132), the first and second hole segments (131, 132) each extending in a direction perpendicular to the bottom surface of the slider (11), the first hole segment (131) communicating to the pocket (111), the second hole segment (132) communicating to the lower surface of the slider (11).

5. Core pulling mechanism according to claim 3, characterized in that the thickness of said guide tab (12) is equal to the depth of said pocket (111).

6. Core pulling mechanism according to claim 1, characterized in that said guide tab (12) is fixed to the upper surface of said slider (11).

7. Core pulling mechanism according to claim 6, wherein said through hole (13) comprises two staggered first (131) and second (132) hole segments, said first (131) and second (132) hole segments extending in a direction perpendicular to the bottom surface of said slider (11), said first hole segment (131) communicating to the upper surface of said slider (11), said second hole segment (132) communicating to the lower surface of said slider (11).

8. Core pulling mechanism according to claim 1, characterized in that the side of the guiding hole (121) facing the stationary die has a chamfer (122).

9. Core pulling mechanism according to claim 1, characterized in that the hole walls of the guiding holes (121) are provided with a wear resistant layer.

10. An injection mold comprising a stationary mold, a movable mold, and the core-pulling mechanism of any one of claims 1 to 9.

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