CN210362293U - Built-in thimble core-pulling structure of injection mold - Google Patents

Built-in thimble core-pulling structure of injection mold Download PDF

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Publication number
CN210362293U
CN210362293U CN201920778638.6U CN201920778638U CN210362293U CN 210362293 U CN210362293 U CN 210362293U CN 201920778638 U CN201920778638 U CN 201920778638U CN 210362293 U CN210362293 U CN 210362293U
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CN
China
Prior art keywords
limiting
shovel base
inclined surface
sliding
block
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Expired - Fee Related
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CN201920778638.6U
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Chinese (zh)
Inventor
南基学
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Dongguan Yejia Electronic Technology Co ltd
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Dongguan Yejia Electronic Technology Co ltd
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Priority to CN201920778638.6U priority Critical patent/CN210362293U/en
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Abstract

The utility model provides a core-pulling structure for a built-in thimble of an injection mold, which comprises a slide block and a shovel base, wherein one surface of the slide block close to the shovel base is a first inclined surface, and one surface of the shovel base close to the slide block is a second inclined surface; an inclined guide hole is formed in the sliding block, a limiting sliding cavity is further formed in the sliding block, a first translation channel and a second translation channel are connected to the two ends of the limiting sliding cavity respectively, an ejector pin is connected in the first translation channel in a sliding mode, a spring is sleeved outside the ejector pin, a first limiting block is fixed to one end, close to the shovel base, of the ejector pin, a return needle is connected in the first translation channel in a sliding mode, a second limiting block is fixed to one end, far away from the shovel base, of the return needle, the first limiting block and the second limiting block are located in the limiting sliding cavity, and a deep bone forming groove is fixed to one side; the second inclined plane is provided with a time delay groove, the side wall of the time delay groove far away from the slide block is a time delay wall, and the time delay wall is vertical to the horizontal plane. The utility model discloses realize independent operation of loosing core to slim structure, can avoid the structure to be damaged.

Description

Built-in thimble core-pulling structure of injection mold
Technical Field
The utility model relates to an injection mold specifically discloses an injection mold's built-in thimble structure of loosing core.
Background
Injection molding is a process used to mass produce parts of some complex shapes. Specifically, the plastic melted by heating is injected into a mold cavity from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification. The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate dimensions.
Different conditions have different demands on products, when the side wall of the plastic product is provided with a through hole groove and a boss, the plastic product cannot be directly separated from a mold, molding parts of a molding hole, the groove and the boss must be made to be movable, and after the injection molding is completed, the molding parts need to be pulled away from the injection molding product, commonly called core pulling. Deep bone portion is slim, glues the fragile structure in position, and when loosing core, deep bone portion is pulled easily and is hindered the deformation, leads to injection moulding product to be damaged, still has the risk of sticking mould even, very easy lead to injection moulding product directly to scrap.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a core pulling structure for a built-in thimble of an injection mold, which can implement independent and stable core pulling operation on a thin sidewall structure and can effectively prevent the thin structure from being damaged.
In order to solve the prior art problem, the utility model discloses a built-in thimble core pulling structure of an injection mold, which comprises a slide block and a shovel base, wherein one surface of the slide block close to the shovel base is a first inclined surface, one surface of the shovel base close to the slide block is a second inclined surface, the first inclined surface inclines upwards, the second inclined surface inclines downwards, and the first inclined surface is in parallel contact with the second inclined surface;
an inclined guide hole penetrating through the upper part and the lower part is arranged in the sliding block, the axis of the inclined guide hole, the first inclined plane and the second inclined plane are parallel to each other, an inclined guide pillar is slidably connected in the inclined guide hole, a limiting sliding cavity is further arranged in the sliding block, two ends of the limiting sliding cavity are respectively connected with a first translation channel and a second translation channel, the first translation channel penetrates through one side, away from the shovel base, of the sliding block, the second translation channel penetrates through one side, close to the shovel base, of the sliding block, an ejector pin is slidably connected in the first translation channel, a spring is sleeved outside the ejector pin, a first limiting block is fixed at one end, close to the shovel base, of the ejector pin, a return needle is slidably connected in the first translation channel, a second limiting block is fixed at one end, away from the shovel base, of the return needle, the first limiting block and the second limiting block are located in the limiting sliding cavity, the spring is located between the side walls of the first limiting sliding block and;
the second inclined plane is provided with a time delay groove, the side wall of the time delay groove far away from the sliding block is a time delay wall, the time delay wall is vertical to the horizontal plane, and the bottom of the time delay wall is directly connected with the second inclined plane.
Furthermore, the axle center of the inclined guide hole forms an included angle of 60 degrees with the horizontal plane.
Furthermore, a molding convex needle is fixed on one side of the sliding block away from the shovel base.
Furthermore, both sides of the sliding block are provided with a limiting track, and the axis of the limiting track is parallel to the axis of the limiting sliding cavity.
Furthermore, both sides of the sliding block are fixed with a sliding bottom plate, and the sliding bottom plate is tightly attached to the bottom of the limiting track.
Furthermore, the top of the shovel base is provided with a guide hole.
The utility model has the advantages that: the utility model discloses an injection mold's built-in thimble structure of loosing core, be provided with built-in thimble and return needle, when loosing core, will loose core the action through special structure and divide into two steps, thimble cooperation slider relative displacement realizes reliable loosing core earlier to slim lateral wall structure, the time delay is ejecting back, thimble cooperation slider is retreated in step and is realized the complete operation of loosing core to the holistic side structure of injection moulding product, realize independent stable operation of loosing core to slim lateral wall structure, it is accurate reliable to loose core the action, can effectively avoid slim structure to be damaged.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic view of the cross-sectional structure of the present invention along a-a' in fig. 2 during injection molding.
Fig. 4 is a schematic view of the cross-sectional structure of the core-pulling device along a-a' in fig. 2.
Fig. 5 is a schematic view of the cross-sectional structure of the core pulling device along a-a' in fig. 2 according to the present invention.
The reference signs are: the device comprises a sliding block 10, a first inclined surface 11, an inclined guide hole 12, an inclined guide post 121, a limiting sliding cavity 13, a first translation channel 14, a second translation channel 15, a deep bone forming groove 16, a forming convex needle 17, a limiting rail 18, a sliding bottom plate 19, a shovel base 20, a second inclined surface 21, a delay groove 22, a delay wall 221, a guide hole 23, an ejector pin 31, a first limiting block 311, a return needle 32, a second limiting block 321, a spring 33, an injection molding product 40, a finished deep bone part 41 and a groove hole 42.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 to 5.
The embodiment of the utility model discloses a built-in thimble structure of loosing core of injection mold, as shown in fig. 1, 2, including slider 10 and shovel base 20, the one side that slider 10 is close to shovel base 20 is first inclined plane 11, and the one side that shovel base 20 is close to slider 10 is second inclined plane 21, and first inclined plane 11 slopes upwards, and second inclined plane 21 slopes downwards, and first inclined plane 11 and second inclined plane 21 parallel contact, namely first inclined plane 11 and second inclined plane 21 are parallel to each other and hug closely the contact;
an inclined guide hole 12 penetrating through the upper and lower parts is arranged in the slide block 10, the inclined guide hole 12 penetrates through the upper and lower surfaces of the slide block 10, the axis of the inclined guide hole 12, the first inclined surface 11 and the second inclined surface 21 are parallel to each other, an inclined guide post 121 is slidably connected in the inclined guide hole 12, a limiting sliding cavity 13 is further arranged in the slide block 10, two ends of the limiting sliding cavity 13 are respectively connected with a first translation channel 14 and a second translation channel 15, preferably, the limiting sliding cavity 13, the first translation channel 14 and the second translation channel 15 are cylindrical channels, the diameters of the first translation channel 14 and the second translation channel 15 are R, the diameter of the limiting sliding cavity 13 is R, R > R, the first translation channel 14 penetrates through one side of the slide block 10 far away from the shovel base 20, the second translation channel 15 penetrates one side of the slide block 10 near the shovel base 20, an ejector pin 31 is slidably connected in the first translation channel 14, a spring 33 is sleeved outside the ejector pin 31, and a first limiting block 311 is, a return needle 32 is slidably connected in the first translation channel 14, a second limiting block 321 is fixed at one end of the return needle 32 far away from the shovel base 20, the first limiting block 311 and the second limiting block 321 are both positioned in the limiting sliding cavity 13, the spring 33 is positioned between the first limiting block 311 and the side wall of the limiting sliding cavity 13, the first limiting block 311 and the second limiting block 321 are both cylindrical block-shaped structures, the diameters of the first limiting block 311 and the second limiting block 321 are both R, the spring 33 is used for buffering the ejection action of the ejector pin 31 and can drive the ejector pin 31 to reset at the same time, a deep bone forming groove 16 is fixed at one side of the slider 10 far away from the shovel base 20, and the deep bone forming groove 16 is used for forming a thin deep bone structure;
the time delay groove 22 is arranged in the second inclined surface 21, the side wall of the time delay groove 22 away from the slider 10 is the time delay wall 221, the time delay wall 221 is perpendicular to the horizontal plane, namely, the time delay wall 221 and the second inclined surface 21 form an included angle, and the included angle is not a right angle, so that the time delay wall 221 plays a role in delaying and pushing out the return needle 32, the bottom of the time delay wall 221 is directly connected with the second inclined surface 21, and the time delay wall 221 can be ensured to be matched with the second inclined surface 21 to realize seamless driving on the return needle 32.
When the utility model works, the deep bone forming groove 16 and the mould main body form an injection mould cavity, the slide block 10 can only move horizontally under the restriction of the external structure, and the shovel base 20 can only lift vertically under the restriction of the external structure; during injection molding, as shown in fig. 3, one end of the return needle 32 away from the second stopper 321 is inserted into the top of the delay slot 22, that is, the return needle 32 is located at the deepest top of the delay slot 22, the compressed spring 33 is in the longest state, and the thimble 31 is completely located in the first translation channel 14; after the injection molding is finished, performing core pulling for the first time, as shown in fig. 4, the inclined guide post 121 lifts and drives the slider 10 to move close to the shovel base 20, the shovel base 20 moves upwards under the action of the first inclined surface 11 and the second lower surface, the delay wall 221 drives the return needle 32 and the ejector pin 31 to move away from the shovel base 20, the ejector pin 31 protrudes out of the left end of the first translation channel 14, and the core pulling is realized on the finished deep bone part 41 by matching with the retreated slider 10, so that the finished deep bone part 41 is prevented from being pulled to deform; during the second core pulling, as shown in fig. 5, the return needle 32 is separated from the time delay slot 22, the end of the return needle 32 directly contacts the second inclined surface 21, the ejector pin 31 and the first translation channel 14 are relatively stationary, and the ejector pin 31 moves back along with the slider 10 to complete the core pulling operation on other structures.
The utility model discloses be provided with built-in thimble 31 and return needle 32, when loosing core, will loose core the action through special structure and divide into two steps, thimble 31 cooperation slider 10 relative displacement realizes reliable loosing core earlier to slim lateral wall structure, the time delay is ejecting back, thimble 31 cooperation slider 10 is retreated in step and is realized complete operation of loosing core to the holistic side structure of injection moulding 40, realize independent stable operation of loosing core to slim lateral wall structure, it is accurate reliable to loose core the action, can effectively avoid slim structure to be damaged.
In this embodiment, the axis of the inclined guide hole 12 forms an angle of 60 degrees with the horizontal plane, and the first inclined surface 11 and the second inclined surface 21 both form an angle of 60 degrees with the horizontal plane, so as to effectively improve the smoothness of the core pulling operation.
In this embodiment, a molding protruding needle 17 is fixed on a side of the slider 10 away from the shovel base 20, the molding protruding needle 17 can form a groove hole 42 in the injection product 40, and the core pulling of the molding protruding needle 17 is completed in the second time.
In this embodiment, two sides of the slider 10 are both provided with a limiting rail 18, an axis of the limiting rail 18 is parallel to an axis of the limiting sliding cavity 13, and the limiting rail 18 is connected with an external machine structure in a locking manner and used for limiting the slider 10 to move horizontally.
Based on the above embodiment, the sliding bottom plate 19 is fixed on both sides of the slider 10, the sliding bottom plate 19 is tightly attached to the bottom of the limiting rail 18, and the limiting rail 18 can effectively limit the up-down position of the sliding bottom plate 19, so as to effectively limit the up-down position of the slider 10.
In this embodiment, the top of the shovel base 20 is provided with a guide hole 23, the guide hole 23 is perpendicular to the horizontal plane, and the guide hole 23 is connected with an external guide post, so that the movement track of the shovel base 20 can be effectively limited, and the shovel base 20 can only move up and down.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (6)

1. The core pulling structure of the built-in thimble of the injection mold is characterized by comprising a sliding block (10) and a shovel base (20), wherein one surface, close to the shovel base (20), of the sliding block (10) is a first inclined surface (11), one surface, close to the sliding block (10), of the shovel base (20) is a second inclined surface (21), the first inclined surface (11) inclines upwards, the second inclined surface (21) inclines downwards, and the first inclined surface (11) is in parallel contact with the second inclined surface (21);
an inclined guide hole (12) penetrating through the upper and lower parts is arranged in the sliding block (10), the axis of the inclined guide hole (12), the first inclined surface (11) and the second inclined surface (21) are parallel to each other, an inclined guide post (121) is connected in the inclined guide hole (12) in a sliding manner, a limiting sliding cavity (13) is further arranged in the sliding block (10), a first translation channel (14) and a second translation channel (15) are connected to two ends of the limiting sliding cavity (13) respectively, the first translation channel (14) penetrates through one side, far away from the shovel base (20), of the sliding block (10), the second translation channel (15) penetrates through one side, close to the shovel base (20), of the sliding block (10), an ejector pin (31) is connected in the first translation channel (14) in a sliding manner, a spring (33) is sleeved outside the ejector pin (31), and a first limiting block (311) is fixed at one end, close to the shovel base (20), of the ejector pin (, a return needle (32) is connected in the first translation channel (14) in a sliding manner, a second limiting block (321) is fixed at one end, far away from the shovel base (20), of the return needle (32), the first limiting block (311) and the second limiting block (321) are both located in the limiting sliding cavity (13), the spring (33) is located between the first limiting block (311) and the side wall of the limiting sliding cavity (13), and a deep bone forming groove (16) is fixed at one side, far away from the shovel base (20), of the sliding block (10);
a time delay groove (22) is formed in the second inclined surface (21), the side wall, away from the sliding block (10), of the time delay groove (22) is a time delay wall (221), the time delay wall (221) is perpendicular to the horizontal plane, and the bottom of the time delay wall (221) is directly connected with the second inclined surface (21).
2. The structure of claim 1, wherein an angle formed by an axis of the inclined guide hole (12) and a horizontal plane is 60 degrees.
3. The structure of claim 1, wherein a molding protruding needle (17) is fixed to a side of the slider (10) away from the shovel base (20).
4. The structure of loosing core of an internal thimble of an injection mold according to claim 1, wherein both sides of the slider (10) are provided with a limiting rail (18), and the axis of the limiting rail (18) is parallel to the axis of the limiting sliding cavity (13).
5. The structure of claim 4, wherein a sliding bottom plate (19) is fixed to each of two sides of the slider (10), and the sliding bottom plate (19) is closely attached to the bottom of the limiting rail (18).
6. The structure of claim 1, wherein a guide hole (23) is formed in the top of the shovel base (20).
CN201920778638.6U 2019-05-27 2019-05-27 Built-in thimble core-pulling structure of injection mold Expired - Fee Related CN210362293U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920778638.6U CN210362293U (en) 2019-05-27 2019-05-27 Built-in thimble core-pulling structure of injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920778638.6U CN210362293U (en) 2019-05-27 2019-05-27 Built-in thimble core-pulling structure of injection mold

Publications (1)

Publication Number Publication Date
CN210362293U true CN210362293U (en) 2020-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920778638.6U Expired - Fee Related CN210362293U (en) 2019-05-27 2019-05-27 Built-in thimble core-pulling structure of injection mold

Country Status (1)

Country Link
CN (1) CN210362293U (en)

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Granted publication date: 20200421

CF01 Termination of patent right due to non-payment of annual fee