CN213798011U - Injection mold of hollow pipe fitting - Google Patents
Injection mold of hollow pipe fitting Download PDFInfo
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- CN213798011U CN213798011U CN202021855385.7U CN202021855385U CN213798011U CN 213798011 U CN213798011 U CN 213798011U CN 202021855385 U CN202021855385 U CN 202021855385U CN 213798011 U CN213798011 U CN 213798011U
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Abstract
The utility model discloses an injection mold of cavity pipe fitting belongs to injection mold technical field. The die sleeve is hollow and columnar; the taper angle hole section is arranged in the middle of one end face of the die sleeve along the central axis direction of the die sleeve, and the hole diameter is gradually reduced from one end face of the die sleeve to the other end face of the die sleeve; the diameter bearing hole section is arranged in the middle of the other end face of the die sleeve along the central axis direction of the die sleeve, is a straight hole and is communicated with the cone angle hole section; the mould core is connected with the mould sleeve, and part of the mould core is arranged in the hollow structure of the mould sleeve; and one end of the core section is connected with the small-diameter end face of the conical section, and the other end of the core section penetrates through the diameter bearing hole section of the die sleeve and extends out of the die sleeve. The utility model discloses simple structure, installation convenient to use, and the material stream can be filled rapidly closely after getting into the mould, and quick shaping has still guaranteed the quality of product when guaranteeing production efficiency.
Description
Technical Field
The utility model belongs to the technical field of injection mold, more specifically say, relate to an injection mold of cavity pipe fitting.
Background
Injection molding is a method for producing and molding industrial products, and thermoplastic material flow is molded into a required shape by using different molding dies through an injection molding machine.
When the existing injection mold is used for producing hollow pipes, the quality levels of the products are uneven, and the defects of uneven density distribution of the pipes, rough and clean pipe wall surfaces and the like exist.
Through retrieval, the Chinese patent publication number: CN 111347629A; the publication date is as follows: 30 months 06 months 2020; the utility model discloses a needle tubing injection mold with quick cooling structure ejection of compact of being convenient for, including processing platform and lower die stage, the upper end both sides welding of processing platform has last bearing frame, and is provided with the promotion structure on one side of processing platform, the inboard upper end that promotes the structure is provided with lower die stage, and the upper end top of lower die stage distributes and have the die, the outer wall both sides of die run through there is the cotter, and the junction of cotter and die is provided with the pinhole, the opposite side inner wall welding of going up the bearing frame has the guide rail. The injection mold of this application can effectively improve the production efficiency of moulding plastics of hollow pipe spare, still can not solve the problem of product quality.
Disclosure of Invention
At least one for solving the above-mentioned problem, the utility model provides an injection mold of cavity pipe fitting, include:
the die sleeve is in a hollow cylindrical shape;
the taper angle hole section is arranged in the middle of one end face of the die sleeve along the central axis direction of the die sleeve, and the hole diameter is gradually reduced from one end face of the die sleeve to the other end face of the die sleeve;
the diameter bearing hole section is arranged in the middle of the other end face of the die sleeve along the central axis direction of the die sleeve, is a straight hole and is communicated with the cone angle hole section; also comprises the following steps of (1) preparing,
a mold core connected with the mold sleeve, and a part of the mold core is arranged in the hollow structure of the mold sleeve, the mold core comprises,
a tapered section disposed in the tapered bore section of the die case;
and one end of the core section is connected with the small-diameter end face of the conical section, and the other end of the core section penetrates through the diameter bearing hole section of the die sleeve and extends out of the die sleeve.
According to the utility model discloses injection mold of cavity pipe fitting, optionally, the distance that the core section stretches out the die sleeve is D, and 1mm is less than or equal to D and is less than or equal to 2 mm.
According to the utility model discloses injection mold of cavity pipe fitting, optionally, the distance of toper section minor diameter end face apart from the diameter-bearing hole section is H, and 1.5mm is less than or equal to H and is less than or equal to 2.5 mm.
According to the utility model discloses injection mold of cavity pipe fitting, optionally, the length that holds the footpath hole section is L, and L is 1.5~2 times for holding footpath hole section diameter.
According to the utility model discloses injection mold of cavity pipe fitting, optionally, the mold core outer cone angle is alpha, and the interior cone angle of mold core is beta, and beta-alpha =4~ 9.
According to the utility model discloses injection mold of cavity pipe fitting, optionally, on the pore wall of die sleeve taper angle hole section, be formed with the thread groove along die sleeve axis direction.
According to the utility model discloses injection mold of cavity pipe fitting, optionally, the mold core still includes:
the outer diameter of the limiting ring is the same as the outer diameter of the end face of the die sleeve, which is provided with the taper angle hole section, and the inner diameter of the limiting ring is the same as the diameter of the large-diameter end part of the taper angle hole section;
the connecting end is positioned in the middle of the limiting ring and is fixedly connected with the limiting ring through a plurality of connecting plates;
one end face of the connecting end is fixedly connected with the large-diameter end face of the conical section.
Advantageous effects
Compared with the prior art, the utility model discloses following beneficial effect has at least:
(1) the injection mold for the hollow pipe fitting has the advantages of simple structure and convenient installation and use, and the material flow can be rapidly filled and compacted after entering the mold, and can be rapidly molded, thereby ensuring the production efficiency and the product quality;
(2) the utility model discloses an injection mold of hollow pipe fitting, the distance D that the control core section stretches out the die sleeve is more than or equal to 1mm and less than or equal to 2mm, can play certain guide effect to the hollow pipe fitting of shaping output, also can effectively prevent the condition that the hollow part closed warp after the pipe fitting stretches out;
(3) the injection mold for the hollow pipe fitting controls the distance between the small-diameter end surface of the conical section and the diameter bearing hole section to be 1.5mm or more and H is less than or equal to 2.5mm, thereby improving the production efficiency and ensuring the quality of the outer surface of the hollow pipe fitting;
(4) the length L of the bearing diameter hole section of the injection mold for the hollow pipe fitting is 1.5-2 times of the diameter of the bearing diameter hole section, so that the production efficiency, the surface uniformity of a product and the integral compactness of the product are ensured;
(5) the injection mold for the hollow pipe fitting controls the angle difference beta-alpha = 4-9 degrees, ensures that the pressure can make the product compact and uniform, the resistance is not too large, and the production efficiency is ensured;
(6) the utility model discloses an injection mold of cavity pipe fitting, the setting of thread groove plays the guide effect to the material stream of pouring into in die sleeve and the mold core, and the material stream in the ability mixing passageway, when guaranteeing the passageway of material stream in bore hole section department, passageway circumference all has the material stream evenly to get into, further guarantees the homogeneity of product density.
Drawings
In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it should be apparent that the drawings in the following description only relate to some embodiments of the present invention and are not intended to limit the present invention.
Fig. 1 is a half sectional view of an injection mold for a hollow pipe fitting of the present invention;
FIG. 2 is a half-sectional view of the mold core of the present invention;
FIG. 3 is a schematic view of the end face of the mold core of the present invention;
FIG. 4 is a half sectional view of the die case of the present invention;
FIG. 5 is a schematic view of the end face of the die case of the present invention;
FIG. 6 is a half sectional view of a die case of example 6;
in the figure:
1. die sleeve; 10. a cone angle bore section; 11. a diameter bearing hole section; 12. a hollow tube outlet; 13. a thread groove;
2. a mold core; 20. a limiting ring; 21. a connecting section; 22. a tapered section; 23. a core segment; 24. a connecting plate.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Example 1
The injection mold of the hollow pipe fitting of the embodiment comprises:
the die sleeve 1 is in a hollow columnar shape;
the taper angle hole section 10 is arranged in the middle of one end face of the die sleeve 1 along the central axis direction of the die sleeve 1, and the hole diameter is gradually reduced from one end face of the die sleeve 1 to the other end face;
the diameter bearing hole section 11 is arranged in the middle of the other end face of the die sleeve 1 along the central axis direction of the die sleeve 1, is a straight hole and is communicated with the taper angle hole section 10; also comprises the following steps of (1) preparing,
a mold core 2 which is connected with the mold sleeve 1 and is partially arranged in the hollow structure of the mold sleeve 1, the mold core 2 comprises,
a tapered section 22 disposed in the tapered bore section 10 of the die case 1;
and the core segment 23 has one end connected with the small-diameter end face of the conical segment 22 and the other end penetrating through the diameter bearing hole segment 11 of the die sleeve 1 and extending out of the die sleeve 1.
In the present embodiment, as shown in fig. 1, a channel for injecting plastic is formed between the mold sleeve 1 and the mold core 2 by the cooperation of the mold sleeve 1 and the mold core 2, and the plastic flows through the channel and is then extruded from the outlet 12 of the hollow pipe of the mold sleeve 1, as shown in fig. 5, so that the hollow pipe product is obtained conveniently and quickly.
The mold sleeve 1 is arranged on an injection molding machine, one part of the mold core 2 extends into the hollow part of the mold sleeve 1, and the other part is positioned outside the hollow part of the mold sleeve 1 and is fixedly connected with the mold sleeve 1 and the injection molding machine; the bore bearing section 11 of the die sleeve 1 is flat and smooth in wall surface, and the surface of the core section 23 is also flat and smooth, which is beneficial to obtaining a hollow pipe product with a smooth surface.
Further, the hollow structure of the mold sleeve 1 of this embodiment includes a taper angle hole section 10 and a diameter bearing hole section 11, the portion of the mold core 2 extending into the hollow portion of the mold sleeve 1 includes a taper section 22 and a mold core section 23, after the mold core 2 is installed in cooperation with the mold sleeve 1, an annular long and narrow channel is formed between the taper angle hole section 10 and the taper section 22, the pressure of the material flow injected into the channel by the injection molding machine increases, the pressure of the material flow continuously increases along with the movement of the material flow toward the diameter bearing hole section 11, the density of the material flow is more uniform and compact, the material flow finally flows into a straight channel formed by the diameter bearing hole section 11 and the mold core section 23, the material flow in the channel is formed into a hollow pipe shape and is finally extruded from the outlet 12 of the hollow pipe, the mold core section 23 of this embodiment extends out of a portion of the mold sleeve 1, which facilitates guiding the hollow pipe extending out of the outlet 12 of the hollow pipe, and also prevents the hollow portion from being closed and deformed after the pipe extends out, further ensuring the product quality.
Example 2
The embodiment is further improved on the basis of the embodiment 1, the distance that the core segment 23 extends out of the die sleeve 1 is D, and D is more than or equal to 1mm and less than or equal to 2 mm.
As shown in figure 1, the core section 23 extends out of the die sleeve 1 by a proper length, can play a certain guiding role on the hollow pipe produced by molding, and can also effectively prevent the condition that the hollow part is closed and deformed after the pipe extends out, but the distance that the core section 23 extends out of the die sleeve 1 is D too long, which can lead to the shrinkage of the inner wall of the hollow pipe extruded during the molding process, thereby affecting the product quality, D too short can not play a due role, and through repeated test analysis, the result is obtained, when D is not less than 1mm and not more than 2mm, the effect is best.
Example 3
The embodiment is further improved on the basis of the embodiment 2, the distance between the small-diameter end surface of the conical section 22 and the diameter bearing hole section 11 is H, and H is more than or equal to 1.5mm and less than or equal to 2.5 mm.
As shown in fig. 1, the distance from the small-diameter end surface of the tapered section 22 to the diameter-bearing hole section 11 is H, the production efficiency of the hollow pipe fitting formed in the production process of the hollow pipe fitting is H, along with the increase of H, the pressure of the material flow to the core section 23 is increased, the flow resistance of the material flow is reduced, the production efficiency of the hollow pipe fitting is improved, but the too large H causes the uniformity and quality of the outer wall surface of the hollow pipe fitting extended out by forming to be deteriorated, along with the reduction of H, the resistance of the material flow is increased, the production efficiency is reduced, the too small H causes unsmooth discharging, the production progress is influenced, and to sum up, H is controlled to be 1.5mm or more and is 2.5mm or less in this embodiment, and the quality of the outer surface of the hollow pipe fitting is ensured while the production efficiency is improved.
Example 4
The embodiment is further improved on the basis of the embodiment 3, the length of the diameter bearing hole section 11 is L, and L is 1.5-2 times of the diameter bearing hole section 11.
As shown in fig. 1, the length of the diameter bearing hole section 11 is designed for the size of the outer diameter of the hollow pipe fitting to be produced, the length of the diameter bearing hole section has great influence on the material flow pressure and the uniformity of the product, too long L can cause too large material flow pressure in the die sleeve 1, the production efficiency is low and the surface is not uniform, too short L can cause poor compactness of the whole product although the production efficiency is high, through research and analysis, the length L of the diameter bearing hole section 11 controlled by the embodiment is 1.5-2 times of the diameter bearing hole section 11, and the production efficiency, the surface uniformity of the product and the overall compactness of the product are ensured.
Example 5
The embodiment is further improved on the basis of the embodiment 4, the outer cone angle of the mold core 2 is alpha, the inner cone angle of the mold sleeve 1 is beta, and beta-alpha = 4-9 degrees.
Fig. 2 and 4 show an outer taper angle α of the mold core 2 and an inner taper angle β of the mold sleeve 1, in this embodiment, the outer taper angle α of the mold core 2 is smaller than the inner taper angle β of the mold sleeve 1, the existence of the angle difference gradually shrinks the cross section of the channel formed by the mold core 2 of the mold sleeve 1, and the pressure applied to the material flow during flowing is gradually increased, so that the material flow in the channel is gradually densified and uniform, the smaller the angle difference is, the smaller the pressure is, the smaller the resistance is, the larger the angle difference is, the larger the pressure is, the resistance is, the angle difference β - α = 4-9 ° is controlled in this embodiment, it is ensured that the product is densified and uniform, the resistance is not too large, and the production efficiency is ensured.
Example 6
In this embodiment, a further improvement is made on the basis of embodiment 5, and a thread groove 13 is formed on the hole wall of the taper hole section 10 of the die sleeve 1 along the axial direction of the die sleeve 1.
As shown in fig. 6, the setting of thread groove 13 plays the guide effect to the material stream of pouring into in die sleeve 1 and mold core 2, and can the material stream in the mixing passageway, ensures that the material stream when the passageway of bearing diameter hole section 11 department, and passageway circumference all has the material stream evenly to get into, further ensures the homogeneity of product density the utility model discloses an in the 11 length selection scopes of bearing diameter hole section, can eliminate thread groove 13 and to the influence of surface quality when the product shaping, shaping cavity pipe surface finishing.
Example 7
This embodiment is further improved on the basis of embodiment 6, and mold core 2 still includes:
the outer diameter of the limiting ring 20 is the same as the outer diameter of the end face, provided with the taper angle hole section 10, of the die sleeve 1, and the inner diameter of the limiting ring is the same as the diameter of the large-diameter end part of the taper angle hole section 10;
the connecting section 21 is positioned in the middle of the limiting ring 20 and is fixedly connected with the limiting ring 20 through a plurality of connecting plates 24;
one end face of the connecting section 21 is fixedly connected with the large-diameter end face of the conical section 22.
As shown in fig. 2 and 3, the limiting ring 20 can abut against the end of the mold sleeve 1, and cooperates with an injection molding machine to assist in fixing the relative rest position of the mold core 2 and the mold sleeve 1, the material flow of the injection molding machine is injected from the gap between the limiting ring 20 and the connecting section 21, the connecting plate 24 has a certain flow dividing effect on the material flow, and after the material flow enters the channel formed by the mold sleeve 1 and the mold core 2, the material flow is rapidly mixed and compacted under the action of the angle difference between the thread groove 13 and the conical section 22, and the conical angle hole section 10, and finally is formed and extended out through the channel at the diameter bearing hole section 11.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (7)
1. An injection mold for hollow pipe fittings, comprising:
the die sleeve is in a hollow cylindrical shape;
the taper angle hole section is arranged in the middle of one end face of the die sleeve along the central axis direction of the die sleeve, and the hole diameter is gradually reduced from one end face of the die sleeve to the other end face of the die sleeve;
the diameter bearing hole section is arranged in the middle of the other end face of the die sleeve along the central axis direction of the die sleeve, is a straight hole and is communicated with the cone angle hole section; also comprises the following steps of (1) preparing,
a mold core connected with the mold sleeve, and a part of the mold core is arranged in the hollow structure of the mold sleeve, the mold core comprises,
a tapered section disposed in the tapered bore section of the die case;
and one end of the core section is connected with the small-diameter end face of the conical section, and the other end of the core section penetrates through the diameter bearing hole section of the die sleeve and extends out of the die sleeve.
2. An injection mould for hollow tubes according to claim 1, characterized in that: the distance D that the core section stretches out of the die sleeve is larger than or equal to 1mm and smaller than or equal to 2 mm.
3. An injection mould for hollow tubes according to claim 2, characterized in that: the distance between the small-diameter end surface of the conical section and the diameter bearing hole section is H, and H is more than or equal to 1.5mm and less than or equal to 2.5 mm.
4. An injection mould for hollow tubes according to claim 3, characterized in that: the length of the diameter bearing hole section is L, and L is 1.5-2 times of the diameter bearing hole section.
5. An injection mould for hollow tubes according to claim 4, characterized in that: the outer cone angle of the mold core is alpha, the inner cone angle of the mold core is beta, and beta-alpha = 4-9 degrees.
6. An injection mold for a hollow pipe member according to claim 5, wherein: and a thread groove is formed on the hole wall of the taper hole section of the die sleeve along the axial direction of the die sleeve.
7. An injection mould for hollow pipe elements according to claim 6, characterised in that the mould core further comprises:
the outer diameter of the limiting ring is the same as the outer diameter of the end face of the die sleeve, which is provided with the taper angle hole section, and the inner diameter of the limiting ring is the same as the diameter of the large-diameter end part of the taper angle hole section;
the connecting section is positioned in the middle of the limiting ring and is fixedly connected with the limiting ring through a plurality of connecting plates;
one end face of the connecting section is fixedly connected with the large-diameter end face of the conical section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021855385.7U CN213798011U (en) | 2020-08-31 | 2020-08-31 | Injection mold of hollow pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021855385.7U CN213798011U (en) | 2020-08-31 | 2020-08-31 | Injection mold of hollow pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213798011U true CN213798011U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021855385.7U Active CN213798011U (en) | 2020-08-31 | 2020-08-31 | Injection mold of hollow pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213798011U (en) |
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2020
- 2020-08-31 CN CN202021855385.7U patent/CN213798011U/en active Active
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