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CN217993392U - Two-stage ejection structure of polypropylene injection mold for pig floor - Google Patents

Two-stage ejection structure of polypropylene injection mold for pig floor Download PDF

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Publication number
CN217993392U
CN217993392U CN202221977272.3U CN202221977272U CN217993392U CN 217993392 U CN217993392 U CN 217993392U CN 202221977272 U CN202221977272 U CN 202221977272U CN 217993392 U CN217993392 U CN 217993392U
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fixedly connected
block
ejection
injection mold
ejecting
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CN202221977272.3U
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韩呈永
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Qingdao Mite Mold Co ltd
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Qingdao Mite Mold Co ltd
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Abstract

The utility model relates to the technical field of injection molding, in particular to a secondary ejection structure of a polypropylene injection mold for a pig floor, which comprises a lower mold and a frame which are fixedly connected through a cushion block, wherein the cushion block is a hollow pipe, and the surface of the cushion block is provided with through holes of an annular array; this pig floor polypropylene injection mold's ejecting structure of secondary, through being provided with ejecting piece one, ejecting piece two, the guide bar, lead screw and servo motor, under the restriction of guide bar, ejecting piece two rotates when rotating, drive ejecting piece and rotate simultaneously, ejecting piece one descends because of with the lead screw meshing, ejecting piece one and ejecting piece two between separate more thoroughly, do benefit to the drawing of patterns, and servo motor drives the lead screw and rotates, ejecting piece one vertical motion under the restriction of guide bar, thereby make ejecting piece one extend to ejecting piece two outsidess, make and mould a secondary ejecting, mould more thoroughly that piece and ejecting piece two and lower mould break away from, the drawing of patterns is more thorough.

Description

Two-stage ejection structure of polypropylene injection mold for pig floor
Technical Field
The utility model relates to an injection-molded technology field specifically is a pig floor polypropylene injection mold's ejecting structure of secondary.
Background
Injection molding is a method for producing and manufacturing industrial products, a plastic material in a molten state is injected into a mold, and after cooling, the plastic material is solidified and shaped to obtain a finished product, the method is mainly applied to the field of plastic product production, and the pig floor is also produced by injection molding at present, but the demolding of a plastic part is complicated and inconvenient;
the injection mold with the secondary ejection mechanism, with the application number of 202121849296.6, adopts the design of the outer thimble and the inner thimble, so that the secondary ejection can be performed on the plastic part, and the demolding condition of the plastic part is greatly improved;
when the device is used, the inner thimble still adheres to a plastic part, so that demoulding is still not thorough, and meanwhile, raw materials are easy to leak at the joint of the outer thimble and the lower mould during high-pressure injection moulding, so that the difficulty of demoulding is increased by the leaked raw materials, and the device is inconvenient to use;
therefore, a novel secondary ejection structure of a polypropylene injection mold for a pig floor is provided, so as to solve the problems that the device is troublesome to demold and incomplete.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pig floor polypropylene injection mold's ejecting structure of secondary to the troublesome and not thorough problem of the drawing of patterns that provides in solving above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a secondary ejection structure of a polypropylene injection mold for a pig floor comprises a frame, a hydraulic cylinder, an upper mold, a lower mold and a base, wherein the hydraulic cylinder is fixedly connected to the top end inside the frame;
the lower die is fixedly connected with the frame through a cushion block, the cushion block is a hollow pipe, and through holes in an annular array are formed in the surface of the cushion block.
Preferably, a first ejection block is embedded in the center of the interior of the lower die, one side of the bottom end of the interior of the base is fixedly connected with a first electric push rod, and the first electric push rod is fixedly connected with the first ejection block;
one side of the bottom of the frame is fixedly connected with a second electric push rod, the end part of the second electric push rod is fixedly connected with a rack, a gear ring is nested below the outer side of the first ejection block, and the gear ring is meshed with the rack.
Preferably, the inside of the first ejection block is embedded with a second ejection block with a cylindrical structure, the center of the bottom end inside the base is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a screw rod, and the screw rod is meshed with the second ejection block.
Preferably, the bottom end of the inner part of the first ejection block is fixedly connected with a limiting block, and a 1cm gap is reserved between the upper end face of the limiting block and the lower end face of the second ejection block.
Preferably, the top of the limiting block is fixedly connected with a guide rod, and the other end of the guide rod is embedded in the second ejection block.
Preferably, the first ejection block is in a shape of a T, a circle of protrusions are arranged on the edge of the bottom of the horizontal portion of the first ejection block, and the protrusions are embedded in the lower die.
Preferably, a groove is formed between the horizontal part of the first ejection block and the protrusion, and a sealing ring is embedded in the groove.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this pig floor polypropylene injection mold's ejecting structure of secondary, through being provided with ejecting block one, ejecting block two, the guide bar, lead screw and servo motor, under the restriction of guide bar, when ejecting block two rotates, drive ejecting block and rotate simultaneously, ejecting block one descends because of meshing with the lead screw, it is more thorough to separate between ejecting block one and the ejecting block two, do benefit to the drawing of patterns, and servo motor drives the lead screw and rotates, ejecting block one is vertical motion under the restriction of guide bar, thereby make ejecting block one extend to ejecting block two outsidess, make and mould a secondary ejecting, mould a more thorough that breaks away from with ejecting block two and lower mould, the drawing of patterns is more thorough.
2. Secondly, this kind of pig floor polypropylene injection mold's ejecting structure of secondary, through being provided with ejecting one and sealing washer, the protruding area of contact with the lower mould that can increase of ejecting one bottom reaches better sealed effect, thereby reduce the condition of lou material, the setting up of ejecting one bottom recess has increased the leakage route of raw materials, the sealing washer has increased the resistance that the raw materials leaked simultaneously, better sealed effect has been reached, the condition of the drawing of patterns difficulty that causes because of the raw materials leaks has been reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a cross-sectional view of the overall structure of the present invention;
fig. 3 is a schematic structural view of the ejection block of the present invention;
fig. 4 is an enlarged schematic structural view of a point a in fig. 1 of the present invention;
in the figure: the device comprises a frame 1, a cushion block 101, a second electric push rod 102, a rack 103, a hydraulic cylinder 2, an upper die 3, a lower die 4, a first ejection block 401, a gear ring 402, a second ejection block 403, a limiting block 404, a guide rod 405, a sealing ring 406, a base 5, a first electric push rod 501, a servo motor 502, a lead screw 503.
Detailed Description
Referring to fig. 1 to 2, in the embodiment of the present invention;
example 1: a secondary ejection structure of a polypropylene injection mold for a pig floor comprises a frame 1, a hydraulic cylinder 2, an upper mold 3, a lower mold 4 and a base 5, wherein the hydraulic cylinder 2 is fixedly connected to the top end inside the frame 1, the upper mold 3 is fixedly connected to the bottom of the hydraulic cylinder 2, the lower mold 4 is fixedly connected to the bottom end inside the frame 1, the upper mold 3 and the lower mold 4 are overlapped in the central axis, and the base 5 is fixedly connected to the edge of the bottom of the frame 1;
the lower die 4 is fixedly connected with the frame 1 through a cushion block 101, the cushion block 101 is a hollow pipe, and through holes in an annular array are formed in the surface of the cushion block 101;
the lower die 4 is far away from the inner wall of the bottom side of the frame 1 through the cushion block 101, so that the lower end face of the lower die 4 is exposed in the air, heat dissipation of the lower die 4 is facilitated, meanwhile, a plurality of through holes are formed in the surface of the cushion block 101, ventilation is facilitated, the lower die 4 can uniformly dissipate heat, and cooling of a plastic part is facilitated.
Example 2: referring to the accompanying fig. 2-4 in the specification, embodiment 2 differs from embodiment 1 in that:
an ejection block I401 is embedded in the center of the inner part of the lower die 4, one side of the bottom end of the inner part of the base 5 is fixedly connected with an electric push rod I501, and the electric push rod I501 is fixedly connected with the ejection block I401;
one side of the bottom of the frame 1 is fixedly connected with a second electric push rod 102, the end part of the second electric push rod 102 is fixedly connected with a rack 103, a gear ring 402 is nested below the outer side of the first ejection block 401, and the gear ring 402 is meshed with the rack 103;
the second electric push rod 102 drives the rack 103 to move in the horizontal direction, the first push block 401 is driven to rotate through the gear ring 402, adhesion between the first push block 401 and a plastic part is avoided, the first electric push rod 501 can drive the first push block 401 to move in the vertical direction, the plastic part is quickly pushed out of the lower die 4 by the first push block 401, and therefore the effect of thorough demolding is achieved;
a second ejection block 403 with a cylindrical structure is embedded in the first ejection block 401, a servo motor 502 is fixedly connected to the center of the bottom end in the base 5, a lead screw 503 is fixedly connected to the output end of the servo motor 502, and the lead screw 503 is meshed with the second ejection block 403;
when the first electric push rod 501 can drive the first ejection block 401 to move in the vertical direction, the second ejection block 403 is in a static state under the limitation of the screw rod 503, the second ejection block 403 keeps in a static state relative to the first ejection block 401, and when the second ejection block 403 moves upwards, the plastic part is separated from the second ejection block 403 up and down, so that the plastic part is prevented from being adhered to the second ejection block 403;
the bottom end of the inner part of the first ejection block 401 is fixedly connected with a limiting block 404, and a 1cm gap is reserved between the upper end surface of the limiting block 404 and the lower end surface of the second ejection block 403;
the top of the limiting block 404 is fixedly connected with a guide rod 405, and the other end of the guide rod 405 is embedded in the second ejection block 403;
under the limitation of the guide rod 405, when the second ejection block 403 rotates, the first ejection block 401 is driven to rotate simultaneously, the first ejection block 401 descends due to meshing with the screw rod 503, and the first ejection block 401 and the second ejection block 403 are separated more thoroughly, so that demolding is facilitated;
when the servo motor 502 drives the screw rod 503 to rotate, the first ejection block 401 vertically moves under the limitation of the guide rod 405, so that the first ejection block 401 extends to the outside of the second ejection block 403, the plastic part is ejected for the second time, the plastic part is separated from the second ejection block 403 and the lower die 4 more thoroughly, and the demolding is more thorough;
the first ejection block 401 is T-shaped, a circle of protrusions are arranged on the edge of the bottom of the horizontal portion of the first ejection block 401, and the protrusions are embedded in the lower die 4;
the contact area between the first ejection block 401 and the lower die 4 can be increased through the protrusion at the bottom of the first ejection block, so that a better sealing effect is achieved, and the material leakage is reduced;
a groove is formed between the horizontal part of the first ejection block 401 and the protrusion, and a sealing ring 406 is embedded in the groove;
the arrangement of the groove increases the leakage path of the raw materials, and meanwhile, the sealing ring 406 increases the resistance of raw material leakage, thereby achieving better sealing effect and reducing the situation of difficult demoulding caused by raw material leakage;
the second electric push rod 102, the first electric push rod 501 and the servo motor 502 are all provided with a power supply and a control switch which are matched with the first electric push rod 501 and the servo motor 502, so that intelligent control is realized.

Claims (7)

1. A secondary ejection structure of a polypropylene injection mold for a pig floor comprises a frame (1), a hydraulic cylinder (2), an upper mold (3), a lower mold (4) and a base (5), wherein the hydraulic cylinder (2) is fixedly connected to the top end inside the frame (1), the upper mold (3) is fixedly connected to the bottom of the hydraulic cylinder (2), the lower mold (4) is fixedly connected to the bottom end inside the frame (1), the upper mold (3) and the lower mold (4) are overlapped in the central axis, and the base (5) is fixedly connected to the edge of the bottom of the frame (1);
the die is characterized in that the lower die (4) is fixedly connected with the frame (1) through a cushion block (101), the cushion block (101) is a hollow pipe, and through holes in an annular array are formed in the surface of the cushion block (101).
2. The secondary ejection structure of the polypropylene injection mold for the pig floor according to claim 1, characterized in that: an ejection block I (401) is embedded in the center of the interior of the lower die (4), one side of the bottom end of the interior of the base (5) is fixedly connected with an electric push rod I (501), and the electric push rod I (501) is fixedly connected with the ejection block I (401);
one side of the bottom of the frame (1) is fixedly connected with a second electric push rod (102), the end part of the second electric push rod (102) is fixedly connected with a rack (103), a gear ring (402) is nested below the outer side of the first ejection block (401), and the gear ring (402) is meshed with the rack (103).
3. The secondary ejection structure of the polypropylene injection mold for the pig floor according to claim 2, characterized in that: the ejection block II (403) with a cylindrical structure is embedded into the ejection block I (401), a servo motor (502) is fixedly connected to the center of the bottom end in the base (5), a lead screw (503) is fixedly connected to the output end of the servo motor (502), and the lead screw (503) is meshed with the ejection block II (403).
4. The secondary ejection structure of the polypropylene injection mold for the pig floor according to claim 3, characterized in that: the bottom end of the inner portion of the first ejection block (401) is fixedly connected with a limiting block (404), and a 1cm gap is reserved between the upper end face of the limiting block (404) and the lower end face of the second ejection block (403).
5. The secondary ejection structure of the polypropylene injection mold for the pig floor according to claim 4, characterized in that: the top of the limiting block (404) is fixedly connected with a guide rod (405), and the other end of the guide rod (405) is embedded in the second ejection block (403).
6. The secondary ejection structure of the polypropylene injection mold for the pig floor as claimed in claim 4, wherein: the first ejection block (401) is T-shaped, a circle of protrusions are arranged on the edge of the bottom of the horizontal portion of the first ejection block (401), and the protrusions are embedded in the lower die (4).
7. The secondary ejection structure of the polypropylene injection mold for the pig floor as claimed in claim 6, wherein: a groove is formed between the horizontal part of the first ejection block (401) and the protrusion, and a sealing ring (406) is embedded in the groove.
CN202221977272.3U 2022-07-28 2022-07-28 Two-stage ejection structure of polypropylene injection mold for pig floor Active CN217993392U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202221977272.3U CN217993392U (en) 2022-07-28 2022-07-28 Two-stage ejection structure of polypropylene injection mold for pig floor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221977272.3U CN217993392U (en) 2022-07-28 2022-07-28 Two-stage ejection structure of polypropylene injection mold for pig floor

Publications (1)

Publication Number Publication Date
CN217993392U true CN217993392U (en) 2022-12-09

Family

ID=84318943

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202221977272.3U Active CN217993392U (en) 2022-07-28 2022-07-28 Two-stage ejection structure of polypropylene injection mold for pig floor

Country Status (1)

Country Link
CN (1) CN217993392U (en)

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