CN211492620U - Mold core structure - Google Patents
Mold core structure Download PDFInfo
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- CN211492620U CN211492620U CN201922260945.8U CN201922260945U CN211492620U CN 211492620 U CN211492620 U CN 211492620U CN 201922260945 U CN201922260945 U CN 201922260945U CN 211492620 U CN211492620 U CN 211492620U
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- gap
- ferrule
- needle body
- blind groove
- core
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Abstract
The utility model relates to the technical field of molds, in particular to a mold core structure, wherein a mold core plate is provided with a first perforation, a first needle plate is provided with a first needle body, a second needle plate is provided with a lock pin and a second needle body, and the lock pin and the first needle body respectively extend into the first perforation through two ends of the first perforation; the insertion core is provided with a second through hole, the first needle body extends into the second insertion core and supports the second needle body in a propping mode, and a first gap is formed between the insertion core and the inner hole wall of the first through hole; a second gap is formed between the first needle body and the inner hole wall of the second perforation; the inserting core is provided with a third gap which is communicated with the first gap and the second gap; when the molten plastic is injected into a die cavity formed by the three gaps, the first needle body is prevented from being impacted and inclined by the molten plastic to cause poor molding of a product object by virtue of the jacking and fixing action of the second needle body on the first needle body; the third gap is used for forming a reinforcing rib of the product object, and the connecting strength between the object part formed by the second gap and the object part formed by the first gap is improved.
Description
Technical Field
The utility model relates to the technical field of mold, especially, disclose a mold core structure.
Background
In the manufacturing process of plastic products, in order to promote the production efficiency of the plastic products, the injection molding is often carried out by utilizing the mold, the structures of the plastic products are various, and the structures of the mold also need to be correspondingly matched with the structures of the plastic products. In the prior art, a plastic product often needs to be molded with a hole body part, a hot runner mold is needed to be configured with a core column of the hole body part, and when an inner hole of the hole body part is small, the core column is easy to be impacted by injected molten plastic and deflects, so that the plastic product is not molded well. In addition, the connection strength between the porous body and other parts in the prior art is not enough, so that the product is often damaged due to the breakage of the porous body.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide a mold core structure, which prevents the first needle body from being impacted and inclined by molten plastic to cause bad molding of a product by means of the supporting and fixing action of the second needle body on the first needle body; the third gap is used for forming a reinforcing rib of the product object, and the connecting strength between the object part formed by the second gap and the object part formed by the first gap is improved.
In order to achieve the above object, the utility model discloses a mold core structure, including the mold core board, cooperate first faller and the second faller that the mold core board used, the mold core board is equipped with the first perforation that runs through the mold core board, and the first faller is equipped with first needle body, and the second faller is equipped with lock pin and is located the second needle body in the lock pin, and lock pin, first needle body stretch into in the first perforation via the both ends of first perforation respectively; the insertion core is provided with a second through hole, and the first needle body extends into the second insertion core and supports the second needle body; the outer diameter of the ferrule is smaller than the aperture of the first through hole, and a first gap is formed between the ferrule and the inner hole wall of the first through hole; the outer diameter of the first needle body is smaller than the aperture of the second perforation, and a second gap is formed between the first needle body and the inner hole wall of the second perforation; the ferrule is provided with a third gap which is communicated with the first gap and the second gap, and the third gap penetrates through the side wall of the ferrule and the end face of the free end of the ferrule; the first gap, the second gap, and the third gap combine to form a mold cavity for molding the product object.
The number of the third gaps is multiple, the third gaps are in an annular array around the central axis of the ferrule, and the central axis of the ferrule and the central axis of the second through hole are arranged in a collinear mode.
Furthermore, the ferrule is provided with a first blind groove communicated with the first gap and the third gap, the first blind groove extends along the length direction of the ferrule, the first blind groove is formed by being concavely arranged from the outer side surface of the ferrule, and the first blind groove penetrates through the end surface of the free end of the ferrule; the length of the first blind groove is greater than that of the third gap along the length direction of the ferrule.
The second blind groove extends along the length direction of the ferrule, and is formed by concavely arranging the second blind groove from the inner hole wall of the second through hole, and the second blind groove penetrates through the end face of the free end of the ferrule; and the length of the second blind groove is greater than that of the third gap along the length direction of the ferrule.
Further, along the length direction of the ferrule, the radial depth of the second blind groove gradually decreases from the end face of the second blind groove close to the free end of the ferrule to the end face of the second blind groove far away from the free end of the ferrule.
The first needle body comprises a body and a positioning column formed by protruding from the end face of the body, the second needle body is provided with a positioning hole used for accommodating the positioning column, and the positioning hole is formed by being recessed from the end face of the free end of the second needle body.
Has the advantages that: when the molten plastic is injected into the die cavity formed by the three gaps, the first needle body is prevented from being inclined by the impact of the molten plastic to cause poor molding of the product object by virtue of the supporting and fixing effect of the second needle body on the first needle body, and the injection molding yield of the product object is improved. The third gap is used for forming a reinforcing rib of the product object, so that the connection strength between the part of the object formed by the second gap and the part of the object formed by the first gap is improved, the damage of the part of the object formed by the second gap due to fracture is reduced, and the service life of the product object is prolonged.
Drawings
Fig. 1 is a perspective view of the mold core structure of the present invention.
Fig. 2 is an exploded view of the mold core structure of the present invention.
Fig. 3 is a partial enlarged view of the ferrule of the present invention.
Fig. 4 is a perspective view of the first needle body and the second needle body of the present invention.
The reference numerals include:
1-mold core plate 2-first needle plate 3-second needle plate
4-first perforation 5-first needle body 6-insertion core
7-second needle body 8-second perforation 9-third gap
11-first blind groove 12-second blind groove 13-body
14-positioning column 15-positioning hole.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.
Referring to fig. 1 to 4, the utility model discloses a mold core structure, including core board 1, the first faller 2 and the second faller 3 that cooperate core board 1 to use, be provided with the first perforation 4 that runs through core board 1 on the core board 1, first perforation 4 runs through core board 1 along the thickness direction of core board 1.
The first needle plate 2 is provided with a first needle body 5, and the main body of the first needle body 5 is in a linear cylinder shape; the second needle plate 3 is provided with an insertion core 6 and a second needle body 7 positioned in the insertion core 6, and the insertion core 6 and the first needle body 5 respectively extend into the first through hole 4 through two ends of the first through hole 4.
The insertion core 6 is provided with a second perforation 8, the second perforation 8 penetrates through the insertion core 6 along the length direction of the insertion core 6, the second needle body 7 is detachably contained in the second perforation 8, the first needle body 5 extends into the second insertion core 6 and props against the second needle body 7, namely, the free end of the first needle body 5 and the free end of the second needle body 7 mutually prop and hold together in the second perforation 8.
The outer diameter of the ferrule 6 is smaller than the aperture of the first through hole 4, a first gap is formed between the ferrule 6 and the inner hole wall of the first through hole 4, the first gap is in a straight annular shape, and the first gap is arranged around the ferrule 6.
The external diameter of first needle body 5 is less than the second and perforates 8 the aperture, has the second clearance between the inner hole wall of first needle body 5 and second perforation 8, and the second clearance is straight annular, and the second clearance encircles the setting of second needle body 7.
A third gap 9 which is communicated with the first gap and the second gap is arranged on the ferrule 6, and the third gap 9 penetrates through the side wall of the ferrule 6 and the end face of the free end of the ferrule 6; the first, second and third gaps 9 combine to form a mold cavity for molding the product article.
When the molten plastic is injected into the die cavity formed by the three gaps, the first needle body 5 is prevented from being badly molded due to the inclined impact of the molten plastic by the aid of the second needle body 7 which supports the fixing effect on the first needle body 5, and the injection molding yield of the product is improved.
The third gap 9 is used for forming a reinforcing rib of the product object, the reinforcing rib is used for connecting the object part formed by the first gap and the object part formed by the second gap, the connecting strength between the object part formed by the second gap and the object part formed by the first gap is improved, the probability of damage of the object part formed by the second gap due to fracture is reduced, and the service life of the product object is prolonged.
The number of the third gaps 9 is plural, and the reinforcing ribs formed by the plural third gaps 9 further increase the connection strength between the object part formed by the first gap and the object part formed by the second gap. The plurality of third gaps 9 are arranged in an annular array around the central axis of the ferrule 6, and the central axis of the ferrule 6 is arranged in line with the central axis of the second through hole 8; when the molten plastic is injected into the mold cavity, the radial direction stress of the first needle body 5 and the insertion core 6 is ensured to be uniform approximately, and the uneven internal stress of the product object caused by the uneven stress of the first needle body 5 and the insertion core 6 in the radial direction is reduced.
The cross section of the ferrule 6 is circular, a first blind groove 11 communicated with the first gap and the third gap 9 is arranged on the ferrule 6, the first blind groove 11 extends along the length direction of the ferrule 6, the first blind groove 11 is formed by recessing the outer side surface of the ferrule 6, and the first blind groove 11 penetrates through the end surface of the free end of the ferrule 6; through the arrangement of the first blind groove 11, the connection strength between the reinforcing rib formed by the third gap 9 and the object part formed by the first gap is increased, and the probability of breakage of the reinforcing rib formed by the third gap 9 and the object part formed by the first gap is reduced. Preferably, the length of the first blind groove 11 is greater than the length of the third gap 9 along the length direction of the ferrule 6.
The ferrule 6 is provided with a second blind groove 12 communicated with the second gap and the third gap 9, the second blind groove 12 extends along the length direction of the ferrule 6, the second blind groove 12 is formed by recessing the inner hole wall of the second through hole 8, and the second blind groove 12 penetrates through the end face of the free end of the ferrule 6; through the arrangement of the second blind groove 12, the connection strength between the reinforcing rib formed by the third gap 9 and the object part formed by the second gap is increased, and the probability of breakage of the reinforcing rib formed by the third gap 9 and the object part formed by the second gap is reduced. Preferably, the length of the second blind groove 12 is greater than the length of the third gap 9 along the length direction of the ferrule 6.
Along the length direction of the ferrule 6, from the end face of the second blind groove 12 close to the free end of the ferrule 6 to the end face of the second blind groove 12 far away from the free end of the ferrule 6, the radial depth of the second blind groove 12 gradually decreases. Through the structural arrangement of the second blind groove 12, the strength of the part of the object formed by the second gap is enhanced, and the probability of fracture of the part of the object formed by the second gap due to lower strength is reduced.
The first needle body 5 comprises a body 13 and a positioning column 14 formed by protruding from the end face of the body 13, the body 13 is in a linear strip shape, the second needle body 7 is provided with a positioning hole 15 for accommodating the positioning column 14, and the positioning hole 15 is formed by recessing from the end face of the free end of the second needle body 7. When the mold core structure is assembled, the positioning column 14 extends into the positioning hole 15, and the inner hole wall of the positioning hole 15 is blocked and abutted against the positioning column 14, so that the first needle body 5 and the second needle body 7 are stably supported together, and the first needle body 5 is prevented from deflecting due to the impact of molten plastic injected into the mold cavity.
The above description is only for the preferred embodiment of the present invention, and the present specification should not be construed as limiting the present invention.
Claims (6)
1. A mold core structure, its characterized in that: the core plate is provided with a first through hole penetrating through the core plate, the first needle plate is provided with a first needle body, the second needle plate is provided with a core insert and a second needle body positioned in the core insert, and the core insert and the first needle body respectively extend into the first through hole through two ends of the first through hole; the insertion core is provided with a second through hole, and the first needle body extends into the second insertion core and supports the second needle body; the outer diameter of the ferrule is smaller than the aperture of the first through hole, and a first gap is formed between the ferrule and the inner hole wall of the first through hole; the outer diameter of the first needle body is smaller than the aperture of the second perforation, and a second gap is formed between the first needle body and the inner hole wall of the second perforation; the ferrule is provided with a third gap which is communicated with the first gap and the second gap, and the third gap penetrates through the side wall of the ferrule and the end face of the free end of the ferrule; the first gap, the second gap, and the third gap combine to form a mold cavity for molding the product object.
2. The core structure of claim 1, wherein: the number of the third gaps is multiple, the third gaps are in an annular array around the central axis of the ferrule, and the central axis of the ferrule and the central axis of the second through hole are arranged in a collinear mode.
3. The core structure of claim 1, wherein: the ferrule is provided with a first blind groove communicated with the first gap and the third gap, the first blind groove extends along the length direction of the ferrule, the first blind groove is formed by recessing the outer side surface of the ferrule, and the first blind groove penetrates through the end surface of the free end of the ferrule; the length of the first blind groove is greater than that of the third gap along the length direction of the ferrule.
4. The core structure of claim 1, wherein: the ferrule is provided with a second blind groove communicated with the second gap and the third gap, the second blind groove extends along the length direction of the ferrule, the second blind groove is formed by concavely arranging an inner hole wall of the second through hole, and the second blind groove penetrates through the end face of the free end of the ferrule; and the length of the second blind groove is greater than that of the third gap along the length direction of the ferrule.
5. The core structure of claim 4, wherein: along the length direction of the inserting core, the radial depth of the second blind groove gradually becomes smaller from the end face of the second blind groove close to the free end of the inserting core to the end face of the second blind groove far away from the free end of the inserting core.
6. The core structure of claim 1, wherein: the first needle body comprises a body and a positioning column formed by protruding from the end face of the body, the second needle body is provided with a positioning hole used for accommodating the positioning column, and the positioning hole is formed by being concavely arranged from the end face of the free end of the second needle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922260945.8U CN211492620U (en) | 2019-12-17 | 2019-12-17 | Mold core structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922260945.8U CN211492620U (en) | 2019-12-17 | 2019-12-17 | Mold core structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211492620U true CN211492620U (en) | 2020-09-15 |
Family
ID=72416442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922260945.8U Active CN211492620U (en) | 2019-12-17 | 2019-12-17 | Mold core structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211492620U (en) |
-
2019
- 2019-12-17 CN CN201922260945.8U patent/CN211492620U/en active Active
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