CN210705749U - Internal thread working of plastics material returned mechanism - Google Patents
Internal thread working of plastics material returned mechanism Download PDFInfo
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- CN210705749U CN210705749U CN201921102024.2U CN201921102024U CN210705749U CN 210705749 U CN210705749 U CN 210705749U CN 201921102024 U CN201921102024 U CN 201921102024U CN 210705749 U CN210705749 U CN 210705749U
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- internal diameter
- core pipe
- arc pieces
- core tube
- threaded core
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Abstract
The utility model discloses an internal thread working of plastics material returned mechanism, including screw thread core pipe, be provided with the drive guide pillar that can follow axial motion in the screw thread core pipe, screw thread core pipe is cut into two small circle arc pieces and two big circular arc pieces towards the one end of shaping die cavity, and two small circle arc piece symmetry sets up and has the elasticity that is close to each other, two big circular arc piece also symmetry sets up and has the elasticity that is close to each other. The inner side of the edge of one side of each large arc piece, which is used for connecting the small arc piece, is provided with a contraction cut inclined plane; and one end of the threaded core pipe, which faces the primary movable template, is in an unstressed state, and the two small arc pieces are positioned between the two large arc pieces. The utility model provides a pair of internal thread working of plastics material returned mechanism had both had the advantage of not damaging the work piece, had the advantage of drawing of patterns operation high efficiency again, and had the wide advantage of application scope.
Description
Technical Field
The utility model relates to an injection mold technical field, especially an internal thread working of plastics material returned mechanism.
Background
For example, when injection molding is performed on a plastic part with an internal thread structure such as a bottle cap, demolding operation of the threaded part is usually performed in a mode of rotating a threaded core, or demolding operation of the threaded part is performed in a mode of forcibly removing threads, the demolding operation in the mode of rotating the threaded core is time-consuming, the production efficiency is low, workpieces are easily damaged when demolding is performed in the mode of forcibly removing the threads, and the method is only suitable for some workpieces with high toughness and elasticity. Therefore, it is necessary to provide a novel injection mold for an internal thread part, which has the advantages of not damaging a workpiece, being fast and efficient in demolding operation, and being wide in application range.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides an internal thread working of plastics material returned mechanism had both had not harmed the advantage of work piece, had the advantage of drawing of patterns operation high efficiency again, and had the advantage that application scope is wide.
The utility model provides a technical scheme that its technical problem adopted is:
the internal thread plastic part material returning mechanism comprises a thread core pipe, wherein a driving guide pillar capable of moving along the axial direction is arranged in the thread core pipe, one end, facing a forming concave die cavity, of the thread core pipe is cut into two small arc pieces and two large arc pieces, the two small arc pieces are symmetrically arranged and have elasticity close to each other, and the two large arc pieces are also symmetrically arranged and have elasticity close to each other.
As a further improvement of the technical scheme, the inner side of the edge of one side of each large arc piece, which is used for connecting the small arc piece, is provided with a contraction cut inclined plane; and one end of the threaded core pipe, which faces the molding cavity, is in an unstressed state, and the two small arc pieces are positioned between the two large arc pieces.
As a further improvement of the above technical scheme, the thread type core pipe is arranged on the second-stage movable template, just the second-stage movable template moves towards one side of the forming concave die cavity is provided with a small inner diameter through hole, the other side of the second-stage movable template is provided with a large inner diameter screw hole, the small inner diameter through hole and the large inner diameter screw hole are communicated and collinear, one end of the thread type core pipe passes through the small inner diameter through hole and the other end are located in the large inner diameter screw hole and are provided with annular limiting bulges, and the large inner diameter screw hole is also provided with a hollow stud for fixing the annular limiting bulges.
As a further improvement of the above technical solution, one end of the driving guide post penetrates through the hollow stud and is located in the threaded core tube, and an annular driving protrusion is arranged on the outer side of the other end of the driving guide post.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an internal thread working of plastics material returned mechanism through adopting screw thread type core pipe cooperation drive guide pillar, and the collapsible internal thread demoulding structure of screw thread type core pipe external diameter had both had the advantage of not damaging the work piece, had the high efficiency's of drawing of patterns operation advantage again, and had the wide advantage of application scope.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural view of an internal thread member injection mold according to the present invention during pressing;
fig. 2 is a schematic structural view of the separated injection mold for the internal thread member according to the present invention;
fig. 3 is a schematic structural view of the end of the threaded core tube according to the present invention when being supported by the driving guide post;
fig. 4 is a schematic structural view of the end of the threaded core tube according to the present invention when it is not under stress.
Detailed Description
Referring to fig. 1 to 4, fig. 1 to 4 are schematic structural views of an embodiment of the present invention.
As shown in fig. 1 to 4, an injection mold for an internal thread part comprises a fixed template, a first-stage movable template 1 and a second-stage movable template 2 which are adjacent in sequence, wherein a pouring runner 31 is arranged on the fixed template, a pouring opening 11 connected with the pouring runner 31 is arranged on one side of the first-stage movable template 1 facing the fixed template, a molding cavity 12 is arranged on one side of the first-stage movable template 1 facing the second-stage movable template 2, a threaded core tube 6 is arranged on one side of the second-stage movable template 2 facing the first-stage movable template 1, a driving guide post 5 capable of moving along an axial direction is arranged in the threaded core tube 6, one end of the threaded core tube 6 facing the first-stage movable template 1 is cut into two small arc pieces 61 and two large arc pieces 62, and the two small arc pieces 61 are symmetrically arranged and have elasticity close to each other, the two large circular arc pieces 62 are also symmetrically arranged and have elasticity close to each other. Specifically, the inner side of one side edge of each large arc piece 62 for connecting with the small arc piece 61 is provided with a contraction cut inclined surface 63; and one end of the threaded core pipe 6, which faces the primary movable template 1, is under an unstressed state, and the two small arc pieces 61 are positioned between the two large arc pieces 62.
During injection molding, the driving guide post 5 moves towards the threaded core tube 6 to prop up the threaded core tube 6 towards one end of the primary movable mould plate 1, as shown in fig. 3, so as to form a complete threaded core; after the injection molding is finished, the driving guide post 5 is withdrawn from the thread-shaped core pipe 6, and the thread-shaped core pipe 6 is contracted towards one end of the primary movable template 1, as shown in fig. 4, so that the internal thread part is conveniently demoulded. The shrinkage cut slope 63 can make the shrinkage and expansion of the two small arc pieces 61 smoother.
Further, the movable die plate further comprises a movable guide post 7, one end of the movable guide post 7 is fixedly connected with the fixed die plate, the other end of the movable guide post 7 sequentially penetrates through the first-stage movable die plate 1 and the second-stage movable die plate 2 and then is matched with a limiting nut 71, a first-stage separation spring 72 is arranged between the fixed die plate and the first-stage movable die plate 1, and a second-stage separation spring 73 is arranged between the first-stage movable die plate 1 and the second-stage movable die plate 2. Second grade movable mould board 2 orientation one side of one-level movable mould board 1 is provided with little internal diameter through-hole 21, the opposite side of second grade movable mould board 2 is provided with big internal diameter screw 22, little internal diameter through-hole 21 with big internal diameter screw 22 intercommunication and axis collineation, the one end of screw thread core pipe 6 is passed little internal diameter through-hole 21, the other end are located in the big internal diameter screw 22 and be provided with annular spacing arch 64, still be provided with in the big internal diameter screw 22 and be used for fixing the cavity double-screw bolt 23 of annular spacing arch 64. One end of the driving guide post 5 penetrates through the hollow stud 23 and is positioned in the threaded core tube 6, and the outer side of the other end of the driving guide post 5 is provided with an annular driving protrusion 51.
When the components of the die are separated, the driving guide post 5 is firstly pulled, under the elastic force action of the first-stage separation spring 72, the first-stage movable die plate 1 is firstly separated from the fixed die plate, then, under the elastic force action of the second-stage separation spring 73, the first-stage movable die plate 1 is separated from the second-stage movable die plate 2, finally, the driving guide post 5 continuously moves to the left, and the threaded core tube 6 is withdrawn towards one end of the first-stage movable die plate 1, so that the die can be demoulded.
Specifically, the fixed die plate includes fixed die body board 3 and fixed die apron 4, fixed die apron 4 set up in fixed die body board 3 orientation one side of one-level movable die plate 1, just fixed die body board 3 laminates one side of fixed die apron 4 is provided with the spring mounting groove, be provided with on the fixed die apron 4 and correspond pour a mouthful 11 waste material thimble 41 and with pour a mouthful 11 thimble connecting rod 42 that misplaces, waste material thimble 41 with thimble connecting rod 42's one end by even piece 32 fixed connection of thimble in the spring mounting groove, just even piece 32 of thimble with be provided with thimble spring 33 between the end wall of spring mounting groove.
After the primary movable mold plate 1 is separated from the fixed mold plate, the ejector pin connecting rod 42 loses resistance, so that the ejector pin connecting rod and the waste ejector pin 41 are ejected together under the elastic force of the ejector pin spring 33 to push out the waste in the injection molding runner.
The above description specifically describes the preferred embodiments of the present invention, but of course, the present invention can also adopt different forms from the above embodiments, and equivalent changes or corresponding modifications made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides an internal thread working of plastics material returned mechanism which characterized in that: the forming die comprises a threaded core tube (6), wherein a driving guide post (5) capable of moving along the axial direction is arranged in the threaded core tube (6), one end, facing a forming concave die cavity (12), of the threaded core tube (6) is cut into two small arc pieces (61) and two large arc pieces (62), the two small arc pieces (61) are symmetrically arranged and have elasticity close to each other, and the two large arc pieces (62) are also symmetrically arranged and have elasticity close to each other.
2. The female plastic part stripping mechanism of claim 1, wherein: the inner side of the edge of one side of each large arc piece (62) used for connecting the small arc piece (61) is provided with a contraction cut inclined plane (63); and one end of the threaded core tube (6) facing the molding concave die cavity (12) is under an unstressed state, and the two small arc sheets (61) are positioned between the two large arc sheets (62).
3. The female plastic part stripping mechanism of claim 1, wherein: screw thread type core pipe (6) set up on second grade movable mould board (2), just second grade movable mould board (2) orientation one side of shaping die cavity (12) is provided with little internal diameter through-hole (21), the opposite side of second grade movable mould board (2) is provided with big internal diameter screw (22), little internal diameter through-hole (21) with big internal diameter screw (22) intercommunication and axis collineation, the one end of screw thread type core pipe (6) is passed little internal diameter through-hole (21), the other end are located just be provided with annular spacing arch (64) in big internal diameter screw (22), still be provided with in big internal diameter screw (22) and be used for fixing cavity double-screw bolt (23) of annular spacing arch (64).
4. The female plastic part stripping mechanism of claim 3, wherein: one end of the driving guide post (5) penetrates through the hollow stud (23) to be located in the threaded core tube (6), and an annular driving protrusion (51) is arranged on the outer side of the other end of the driving guide post (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921102024.2U CN210705749U (en) | 2019-07-15 | 2019-07-15 | Internal thread working of plastics material returned mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921102024.2U CN210705749U (en) | 2019-07-15 | 2019-07-15 | Internal thread working of plastics material returned mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210705749U true CN210705749U (en) | 2020-06-09 |
Family
ID=70958199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921102024.2U Active CN210705749U (en) | 2019-07-15 | 2019-07-15 | Internal thread working of plastics material returned mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210705749U (en) |
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2019
- 2019-07-15 CN CN201921102024.2U patent/CN210705749U/en active Active
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