CN215619762U

CN215619762U - Core pulling device and mold

Info

Publication number: CN215619762U
Application number: CN202121341734.8U
Authority: CN
Inventors: 周晓健; 丘永堂
Original assignee: Huizhou Winone Precision Technology Co Ltd
Current assignee: Huizhou Winone Precision Technology Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-25
Anticipated expiration: 2031-06-16

Abstract

The application discloses device and mould of loosing core, the device of loosing core is including going the position seat, first line position mold insert, second line position mold insert and shovel base, wherein go the position seat can be in the compound die position, first loose core position and second are loosed core and are changed between the position, first line position mold insert can be loosed core the position with going the position seat at the second and form the linkage cooperation, first line position mold insert upper end has first shaping portion, first line position mold insert is equipped with first inner chamber and sets up the first opening of intercommunication in one side and first inner chamber, first inner chamber is arranged in to second line position mold insert, can be in the compound die position and change between the first position of loosing core, second line position mold insert is equipped with second shaping portion, shovel base one end and go the position seat sliding connection, the other end inserts first inner chamber and goes the position mold insert sliding connection with the second. The core pulling device can realize the tripping of reverse buckling in multiple directions, is simple and compact in structure, and can effectively reduce the size of a die.

Description

Core pulling device and mold

Technical Field

The application relates to the field of injection molds, in particular to a core pulling device and a mold.

Background

The inside of the injection molded product is usually provided with a multi-directional undercut. Due to the space limitation of the mold structure, smooth tripping of the multi-direction back-off is difficult to realize by adopting the conventional demolding mechanism.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a core pulling device which can realize tripping in multiple directions.

The application also provides a mould with the back-off demoulding device.

According to the core pulling device of the first aspect embodiment of the application, comprising,

the slide seat can be switched among a mold closing position, a first core pulling position and a second core pulling position;

the first slide insert can be in linkage fit with the slide seat at the second core-pulling position, a first forming part is arranged at the upper end of the first slide insert, the first slide insert is provided with a first inner cavity, and a first opening communicated with the first inner cavity is formed in one side of the first slide insert;

the second slide insert is arranged in the first inner cavity and can be switched between the die assembly position and the first core pulling position, and the second slide insert is provided with a second forming part;

the shovel base, its one end with slide connection is gone to the position seat, the other end of shovel base inserts first inner chamber, the shovel base with second line position mold insert slide connection works as the position seat is followed the compound die position switches to when the first position of loosing core, drives second line position mold insert orientation with the crossing direction motion of the direction of motion of first line position mold insert.

According to this application embodiment's device of loosing core, have following beneficial effect at least: the demolding of multi-direction back-off can be realized, the structure is simple and compact, the size of the mold can be effectively reduced, and further the production cost is reduced.

According to some embodiments of the application, one of the second slide insert and the shovel base is provided with a sliding block, and the other is provided with a sliding groove which is in embedded fit with the sliding block, and the sliding block can slide relative to the sliding groove.

According to some embodiments of the application, the device of loosing core still includes the elastic component, the one end of elastic component with first line position mold insert butt, the other end of elastic component with second line position mold insert butt, the elastic component is in the elasticity compression state, with to second line position mold insert provides the messenger second line position mold insert with the restoring force that shovel base leaned on each other.

According to some embodiments of the present application, a direction of withdrawal of the blade base from the first lumen is oblique to a direction of movement of the travel base.

According to some embodiments of this application, first line position mold insert still be equipped with the second inner chamber and with the second opening that the second inner chamber is linked together, the device of loosing core still includes oblique top, oblique top is provided with third shaping portion, insert the lower extreme on oblique top in the second inner chamber the compound die position and during the first position of loosing core, third shaping portion passes through the second opening is located the outside of first line position mold insert.

According to some embodiments of this application, first position mold insert of walking is provided with the cushion cap, the cushion cap by the inner wall of second inner chamber to the outside of first position mold insert of walking extends, the top has the step face to one side, the step face is located the downside of third shaping portion the compound die position with first position of loosing core, the cushion cap butt the step face is followed first position of loosing core moves extremely during the position is loosed core to the second, the cushion cap is kept away from the step face.

According to some embodiments of the application, the first forming portion is an upward extending protrusion, the protrusion is distributed in an annular shape, the supporting platform is located on the inner side of the first forming portion, and a gap is formed between the third forming portion and the first forming portion when the mold closing position and the first core pulling position are in the mold closing position.

According to some embodiments of the application, first position mold insert still is equipped with the spacing groove, the spacing groove with the second inner chamber is linked together, the device of loosing core still includes the locating part, the locating part with the oblique top is connected, the locating part can the spacing inslot removes.

According to some embodiments of the application, a through hole is provided on the oblique top, and the stopper can be inserted into the through hole through the stopper groove.

According to a second aspect of the present application, the mold includes the core back device of the first aspect.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic view of a core pulling device and a product according to the present application;

FIG. 2 is a cross-sectional view of the core pulling device of the present application in product engagement;

FIG. 3 is a schematic structural diagram of a core-pulling device according to the present application;

FIG. 4 is another angle structure diagram of the core pulling device shown in FIG. 2;

FIG. 5 is a schematic structural view of a first slide insert in the core pulling apparatus;

FIG. 6 is a cross-sectional view of a first slide insert in the core pulling apparatus;

FIG. 7 is a schematic view of the engagement between the shovel base and the slide seat in the core pulling device;

FIG. 8 is a schematic view of the matching between the shovel base and the first slide insert in the core pulling apparatus;

FIG. 9 is a schematic view of the core pulling device showing the engagement between the lifter and the stopper;

FIG. 10 is a cross-sectional view of the core pulling device in a first state in which it is engaged with the rear mold;

FIG. 11 is a cross-sectional view of the core pulling device in a second state in which the core pulling device is engaged with the rear mold;

FIG. 12 is a cross-sectional view of a third state of the core pulling device in cooperation with the rear mold;

reference numerals:

first alignment insert 110 first forming portion 111 first inner cavity 112 third opening 113

First opening 114 second cavity 115 second opening 116 (right side) bearing platform 117

Limiting groove 118, second slide insert 120, second forming portion 121, shovel base 130, slide seat 140

Elastic member 150 inclined top 160 third forming portion 161 step surface 162 through hole 163 stopper 170

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The core back device according to the first aspect of the present application is described below with reference to fig. 1 to 12.

The core pulling device comprises a slide seat 140, a first slide insert 110, a second slide insert 120 and a shovel base 130, wherein the slide seat 140 can be switched among a mold closing position, a first core pulling position and a second core pulling position, the first slide insert 110 can be in linkage fit with the slide seat 140 at the second core pulling position, a first forming part 111 is arranged at the upper end of the first slide insert 110, the first slide insert 110 is provided with a first inner cavity 112, one side of the first slide insert 110 is provided with a first opening 114 communicated with the first inner cavity 112, the second slide insert 120 is arranged in the first inner cavity 112 and can be switched between the mold closing position and the first core pulling position, and the second slide insert 120 is provided with a second forming part 121; one end of the shovel base 130 is slidably connected with the slide seat 140, the other end of the shovel base 130 is inserted into the first inner cavity 112, the shovel base 130 is slidably connected with the second slide insert 120, and when the slide seat 140 is switched from the mold closing position to the first core pulling position, the second slide insert 120 is driven to move towards the direction intersecting with the moving direction of the first slide insert 110.

Specifically, as shown in fig. 1 to 6, the first slide insert 110 is provided with a first inner cavity 112, a lower portion of the first inner cavity 112 has a third opening 113, the first inner cavity 112 can be communicated with the outside through the third opening 113, a side wall of the first slide insert 110 is provided with a first opening 114, the first inner cavity 112 can be communicated with the outside through the first opening 114, the first opening 114 is located at an upper end portion of the first inner cavity 112, the first slide insert 110 is further provided with a first forming portion 111, the first forming portion 111 is located above the first opening 114, and the first forming portion 111 is substantially a convex block protruding upward for forming a first undercut of the product a. As shown in fig. 2, 3 and 8, the second slide insert 120 is provided with a second molding portion 121, the second molding portion 121 is located at a side portion of the second slide insert 120, the second slide insert 120 is disposed in the first inner cavity 112, a top portion of the second slide insert 120 can abut against a top wall of the first inner cavity 112, and the second molding portion 121 of the second slide insert 120 can be disposed outside the first slide insert 110 through the first opening 114 for forming a second undercut of the product a. Shovel base 130 is the big lower extreme of upper end wedge structure that is little, and the upper end of shovel base 130 inserts in first inner chamber 112 and can butt the roof of first inner chamber 112, and the lower extreme and the slide seat 140 sliding connection of shovel base 130. As shown in fig. 2, in the left-right direction (the left-right direction here only indicates the direction on the drawing and is not a position direction that limits the actual product use state), the shovel base 130 is positioned between the first slide insert 110 and the second slide insert 120, the left side surface of the shovel base 130 abuts against the right side surface of the second slide insert 120, and the shovel base 130 is slidably connected to the second slide insert 120. As shown in fig. 10 to 12, the traveling seat 140 is switchable between a mold clamping position, a first core back position, and a second core back position.

The travel block 140 is shown in the clamped position in FIG. 10. In this state, the second slide insert 120 and the shovel base 130 are both disposed in the first inner cavity 112, and the top of the second slide insert 120 and the top of the shovel base 130 are both abutted against the top wall of the first inner cavity 112, and the second molding portion 121 of the second slide insert 120 is located outside the first slide insert 110 through the first opening 114.

Fig. 11 shows the row seat 140 in the first core back position. The traveling seat 140 moves downward from the mold clamping position in fig. 1 to the first core pulling position in fig. 2, and the traveling seat 140 drives the shovel base 130 to move downward along the side wall of the first inner cavity 112, so that the top of the shovel base 130 faces away from the top wall of the first inner cavity 112. Because the shovel base 130 is a wedge-shaped structure with a small upper end and a large lower end, and the shovel base 130 is slidably connected with the second slide insert 120, the shovel base 130 is driven to drive the second slide insert 120 to move rightward in the downward movement process, so that the second forming portion 121 of the second slide insert 120 moves from the outside of the first slide insert 110 to the inside of the first inner cavity 112 of the first slide insert 110, and the demolding of the second forming portion 121 and the product a is realized.

Fig. 12 shows the slide base 140 in the second core back position. The slide base 140 continuously moves downward from the first core-pulling position in fig. 2 to the second core-pulling position shown in fig. 3, when the slide base 140 moves to the first core-pulling position, the slide base 140 abuts against the bottom of the first slide insert 110 (the slide base 140 cannot be pulled out from the lower end of the first slide insert 110), and in the process that the slide base 140 continuously moves downward, the slide base 140 drives the shovel base 130, the first slide insert 110, and the second slide insert 120 to synchronously move downward (in the process, there is no relative movement among the slide base 140, the shovel base 130, the first slide insert 110, and the second slide insert 120), so that the first molding portion 111 of the first slide insert 110 is far away from the product a, and thus the first molding portion 111 is demolded from the product a.

In some embodiments of the present application, one of the second slide insert 120 and the shovel base 130 is provided with a slide block, and the other is provided with a slide groove which is in embedded fit with the slide block, and the slide groove can slide relative to the slide groove.

Specifically, as shown in fig. 8, a slide groove is formed on the right side surface of the second slide insert 120, a slide block is formed on the left side surface of the shovel base 130, and the slide block of the shovel base 130 is fitted into the slide groove of the second slide insert 120, so that the shovel base 130 can slide with respect to the second slide insert 120. When the slide seat 140 moves from the mold closing position (fig. 10) to the first core pulling position (fig. 11), the slide seat 140 drives the shovel base 130 to move, the shovel base 130 moves downward along the side wall of the first inner cavity 112, and because the shovel base 130 is of a wedge-shaped structure with a small top and a large bottom and the shovel base 130 is not separated from the second slide insert 120, the shovel base 130 can drive the second slide insert 120 to move rightward relative to the top wall of the first inner cavity 112, and the second molding portion 121 of the second slide insert 120 moves into the first inner cavity 112, so that the second molding portion 121 is separated from the product a. It will be appreciated that the right side of second slide insert 120 is provided with a slide block and the left side of the corresponding blade base 130 is provided with a slide slot. One of the second slide insert 120 and the shovel base 130 is provided with a slide block, the other slide block is provided with a slide groove, and the matching mode of the slide groove and the slide block is adopted, so that the matching surfaces of the second slide insert 120 and the shovel base 130 are always abutted, and the reliability that the second forming part 121 of the second slide insert 120 is separated from a product can be improved.

In some embodiments of the present application, the core pulling device further includes a resilient member 150, one end of the resilient member 150 abuts against the first slide insert 110, the other end of the resilient member 150 abuts against the second slide insert 120, and the resilient member 150 is in a compressed state to provide a restoring force for the second slide insert 120 to abut against the second slide insert 120 and the shovel base 130.

Specifically, as shown in fig. 2, the installation direction of the elastic member 150 is the same as the moving direction of the second slide insert 120, one end of the elastic member 150 abuts against the first slide insert 110, the other end of the elastic member 150 abuts against the second slide insert 120, and the elastic member 150 is interposed between the first slide insert 110 and the second slide insert 120 and is always in a compressed state. In this way, elastic member 150 can apply pressure to second slide insert 120, so that second slide insert 120 and blade base 130 are always close to each other, and blade base 130 can always move along the right side surface of first inner cavity 112 during movement. When the restoring force provided by the elastic member 150 is sufficiently large, the sliding between the second slide insert 120 and the shovel base 130 may not be achieved by the way of the sliding groove and the sliding block. That is, the surfaces of the second slide insert 120 contacting the shovel base 130 are both flat surfaces, and when the slide base 140 drives the shovel base 130 to move downward, the shovel base 130 can slide relative to the second slide insert 120, the elastic member 150 applies a restoring force to make the second slide insert 120 and the shovel base 130 approach each other, and the second slide insert 120 approaches the right sidewall of the first inner cavity 112, so that the second forming portion 121 of the second slide insert 120 is separated from the product a.

In order to further improve the operational reliability of the elastic member 150, a guide groove is formed in at least one of the first and second travel inserts 110 and 120, and the elastic member 150 is seated in the guide groove, and the guide groove guides the elastic member 150 to prevent the elastic member 150 from being bent, thereby improving the operational reliability of the elastic member 150.

In some embodiments of the present application, the direction of withdrawal of blade base 130 from first interior cavity 112 is oblique to the direction of movement of row seat 140.

Specifically, as shown in fig. 10 and 11, the traveling base 140 always moves downward in the process of moving from the mold clamping state to the first core back position. The right side wall of first inner cavity 112 is disposed obliquely, and when slide base 130 is driven by slide base 140 to move, slide base 130 slides along the right side wall of first inner cavity 112 and is drawn out, that is, the direction in which slide base 130 is drawn out from first inner cavity 112 is oblique to the moving direction of slide base 140. Since the shovel base 130 is of a wedge-shaped structure with a small upper part and a large lower part, in the process of drawing out the shovel base 130, since the shovel base 130 slides along the upper left relative to the slide base 140, the shovel base 130 acts on the second slide insert 120 to prevent the second slide insert 120 from moving downwards, and it is ensured that the shovel base 130 can only drive the second slide insert 120 to move rightwards, so that the second forming portion 121 of the second slide insert 120 can move into the first inner cavity 112 according to the tripping direction, and the reliability of tripping of the device is improved.

In some embodiments of the present application, the first in-line insert 110 is further provided with a second inner cavity 115 and a second opening 116 communicating with the second inner cavity 115, the core pulling device further includes a slanted ejecting portion 160, the slanted ejecting portion 160 is provided with a third forming portion 161, a lower end of the slanted ejecting portion 160 is inserted into the second inner cavity 115, and the third forming portion 161 is located outside the first in-line insert 110 through the second opening 116 in the mold closing position and the first core pulling position.

Specifically, as shown in fig. 2 to 6, the first positioning insert 110 is further provided with a second inner cavity 115, and the second inner cavity 115 and the first inner cavity 112 are independent cavity structures. The second opening 116 of the first lien insert 110 is located at the top and right side of the first lien insert 110, and the second opening 116 is in communication with the second interior cavity 115. The slanted ejecting part 160 is provided thereon with a third molding part 161, the third molding part 161 is located at the upper end of the slanted ejecting part 160 and at the right side surface of the slanted ejecting part 160, and the slanted ejecting part 160 is inserted into the second inner cavity 115 through the second opening 116. In the mold clamping state (fig. 2 and 10), the top of the lifter 160 is flush with the top of the first in-line insert 110, the right side surface of the lifter 160 is flush with the right side surface of the upper portion of the first in-line insert 110, and the third molding portion 161 of the lifter 160 communicates with the outside through the second opening 116.

In the process of moving the index seat 140 from the mold clamping position to the first core pulling position (the state shown in fig. 10 is changed to the state shown in fig. 11), the first index insert 110 and the lifter 160 are not changed in position, that is, the first index insert 110 and the lifter 160 are fixed with respect to the product a. When the slide base 140 moves from the first core pulling position to the second core pulling position (the state described in fig. 11 is switched to the state shown in fig. 12), the lower end of the slide base 140 abuts against the first slide insert 110, so that the slide base 140 drives the first slide insert 110 to move downward synchronously, the first forming portion 111 of the first slide insert 110 is separated from the product, and the mold release is completed. To better detach the third forming portion 161 of the slanted top 160 from the product a, the inclination angle of the left sidewall of the second inner cavity 115 is set to be identical (or substantially identical) to the inclination angle of the right sidewall of the first inner cavity 112.

In some embodiments of the present application, the first slide insert 110 is provided with a supporting platform 117, the supporting platform 117 extends from the inner wall of the second inner cavity 115 to the outer side of the first slide insert 110, the lifter 160 has a step surface 162, the step surface 162 is located at the lower side of the third forming portion 161, the supporting platform 117 abuts against the step surface 162 in the mold closing position and the first core pulling position, and when the first core pulling position moves to the second core pulling position, the supporting platform 117 is away from the step surface 162.

Specifically, as shown in fig. 2 and 6, the first slide insert 110 is provided with a support base 117, and the support base 117 is formed by extending outward from the top end of the right side wall of the second cavity 115. The lifter 160 has a stepped surface 162 and is located below the third molding portion 161. In the mold closing position and the first core pulling position, the supporting platform 117 abuts against the step surface 162, and in the process of moving from the first core pulling position to the second core pulling position, the first slide insert 110 continuously moves downwards, so that the supporting platform 117 gradually moves away from the step surface 162. Accordingly, during mold closing, the slide base 140 moves upward to drive the shovel base 130 to move upward to abut against the top wall of the first inner cavity 112, and then the first slide insert 110 moves upward to abut the supporting platform 117 against the step surface 162, thereby completing mold closing.

In some embodiments of the present application, the first forming portion 111 is an upwardly extending protrusion, the protrusions are annularly distributed, the supporting platform 117 is located inside the first forming portion 111, and a gap is formed between the third forming portion 161 and the first forming portion 111 in the mold clamping position and the first core pulling position.

Specifically, as shown in fig. 2, 4 and 5, the first molding portion 111 of the first in-line insert 110 is located outside the supporting platform 117, the first molding portion 111 is a convex structure formed by the supporting platform 117 being located on a plane upward, and the first molding portion 111 is arranged around the circumferential direction of the first in-line insert 110. In the left-right direction, there is a gap between the first forming portion 111 and the right side surface of the slanted top 160 (i.e., the surface where the third forming portion 161 is located). This can facilitate the first molding part 111 to form the reverse of the product.

In some embodiments of the present application, the first positioning insert 110 further has a limiting groove 118, the limiting groove 118 is communicated with the second inner cavity 115, the core pulling device further includes a limiting member 170, the limiting member 170 is connected with the slanted ejecting portion 160, and the limiting member 170 can move in the limiting groove 118.

Specifically, as shown in fig. 2, 4 and 9, the first positioning insert 110 is provided with a limiting groove 118, and the limiting groove 118 is communicated with the second inner cavity 115. The stopper 170 is disposed substantially perpendicularly with respect to the lifter 160 and is connected to a lower end of the lifter 160. When the slanted ejecting portion 160 is disposed in the second cavity 115, the retaining member 170 is disposed in the retaining groove 118. When the slide base 140 moves from the first core-pulling position to the second core-pulling position, the first slide insert 110 moves downward, the top of the limiting groove 118 moves downward until abutting against the limiting member 170, so that the core-pulling device is located at the second core-pulling position, and then the slide base 140 continues to move downward to drive the first slide insert 110, the second slide insert 120, the shovel base 130 and the lifter 160 to move downward, so that the core-pulling device is completely separated from the product a. With the above arrangement, the third forming portion 161 of the lifter 160 can be moved downward after being separated from the product a, and the demolding operation is completed.

In some embodiments of the present disclosure, the slanted ejecting portion 160 is provided with a through hole 163, and the position-limiting member 170 can be inserted into the through hole 163 through the position-limiting groove 118.

Specifically, as shown in fig. 9, the lower end of the slanted ejecting portion 160 is provided with a through hole 163, and the stopper groove 118 communicates with the outside. The inclined top 160 is inserted into the second inner cavity 115 from the second opening 116 from the first slide insert 110, the through hole 163 of the inclined top 160 is located at the limiting groove 118, and then the limiting member 170 is inserted into the through hole 163 through the limiting groove 118, so that the limiting member 170 is fixedly connected with the second slide insert 120, and the installation of the second slide insert 120 is completed.

The mold according to the second aspect of the present application, including the core back device according to the first aspect, is described below with reference to the accompanying drawings. Specifically, as shown in fig. 10 to 12, the lower end of the slide base 140 in the core back device 100 is fixedly connected to a backing plate 220 of the back mold, and in the mold closing state, the first slide insert 110 and the slide base 140 located above the backing plate 220 are both located in the back mold plate 210. When the backing plate 220 drives the slide seat 140 to move downwards, the slide seat 140 is moved from the mold closing state to the first core pulling state, in the process, the slide seat 140 drives a part of the shovel base 130 to be drawn out of the first inner cavity 112, and meanwhile, the shovel base 130 drives the second slide insert 120 to move rightwards, so that the second molding part 121 is separated from the product a; the backing plate 220 continues to drive the slide seat 140 to move downwards, so that the slide seat 140 is switched from the first core pulling position to the second core pulling position, in the process, the first slide insert 110 and the slide seat 140 move synchronously, the first forming portion 111 is separated from the product a, in the process, the first slide insert 110 is not abutted against the upper portion of the lifter 160, and the upper portion of the lifter 160 is not bound any more, so that the third forming portion 161 is also separated from the product a. The backing plate 220 continues to drive the slide seat 140 to move downward, and the slide seat 140, the shovel base 130, the second slide insert 120, the first slide insert 110 and the lifter 160 synchronously move under the action of the backing plate 220, so that the core-pulling device is far away from the product a.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims

1. Device of loosing core, its characterized in that includes:

2. The core pulling device according to claim 1, wherein one of the second slide insert and the shovel base is provided with a sliding block, the other sliding block is provided with a sliding groove which is in embedded fit with the sliding block, and the sliding block can slide relative to the sliding groove.

3. The core pulling device according to claim 1, further comprising an elastic member, wherein one end of the elastic member abuts against the first slide insert, the other end of the elastic member abuts against the second slide insert, and the elastic member is in an elastically compressed state so as to provide a restoring force for the second slide insert to abut against the shovel base.

4. The core pulling device according to claim 1, wherein the direction in which the blade base is extracted from the first inner cavity is inclined to the direction of movement of the travel base.

5. The core pulling device according to claim 1, wherein the first slide insert is further provided with a second inner cavity and a second opening communicated with the second inner cavity, the core pulling device further comprises an inclined top, the inclined top is provided with a third forming portion, the lower end of the inclined top is inserted into the second inner cavity, and the third forming portion is located outside the first slide insert through the second opening when the mold closing position and the first core pulling position are performed.

6. The core pulling device according to claim 5, wherein the first slide insert is provided with a bearing table, the bearing table extends from the inner wall of the second inner cavity to the outer side of the first slide insert, the lifter has a step surface, the step surface is located on the lower side of the third forming portion, the bearing table abuts against the step surface at the mold closing position and the first core pulling position, and the bearing table is away from the step surface when moving from the first core pulling position to the second core pulling position.

7. The core pulling device according to claim 6, wherein the first molding portion is an upwardly extending protrusion, the protrusions are annularly distributed, the supporting platform is located on the inner side of the first molding portion, and a gap is formed between the third molding portion and the first molding portion in the mold clamping position and the first core pulling position.

8. The core pulling device according to claim 5, wherein the first positioning insert is further provided with a limiting groove, the limiting groove is communicated with the second inner cavity, the core pulling device further comprises a limiting member, the limiting member is connected with the lifter, and the limiting member can move in the limiting groove.

9. The core pulling device according to claim 8, wherein a through hole is provided in the slanted ejecting, and the stopper is insertable into the through hole through the stopper groove.

10. Mold, characterized in that it comprises a core pulling device according to any one of claims 1 to 9.