CN111590831B - Through-hole forming insert and injection mold with same - Google Patents
Through-hole forming insert and injection mold with same Download PDFInfo
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- CN111590831B CN111590831B CN202010720237.2A CN202010720237A CN111590831B CN 111590831 B CN111590831 B CN 111590831B CN 202010720237 A CN202010720237 A CN 202010720237A CN 111590831 B CN111590831 B CN 111590831B
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- insert
- groove
- step surface
- pin
- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
Abstract
The invention relates to the technical field of injection molding, and provides a through hole molding insert and an injection mold with the same, wherein the through hole molding insert comprises a first insert and a second insert, the first insert and the second insert are not in contact and are respectively used for molding a first groove and a second groove on two sides of a molded product, a first insert pin is arranged in the first insert, a second insert pin is arranged in the second insert, the first insert pin and the second insert pin respectively penetrate through the bottoms of the first groove and the second groove and are mutually abutted, a mandril and a belleville spring are further arranged in the first insert, and two sides of the belleville spring are respectively abutted against the mandril and the first insert pin. When the through hole forming insert is applied to an injection mold, a groove can be formed in an injection molding product, and a through hole is formed in the groove, so that glue overflow and burrs near the through hole can be avoided, and flash in the through hole can be avoided.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to a through hole molding insert and an injection mold with the insert.
Background
In the injection molding process of molded products, a recess is generally formed with an insert, a through-hole is formed with an insert, and the through-hole in the recess is formed with an insert mounted on the insert. In the prior art, the through hole is formed by only one insert pin, glue overflow and burrs are easy to generate near the through hole, and the yield is low; the through hole formed by butting the insert pin with other end faces is easy to generate burrs due to a gap left on the butting face, so that a process for processing the burrs needs to be added, and the processing efficiency is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a through hole forming insert which can form a through hole in a groove, the formed through hole is free from the phenomena of glue overflow, burrs, flash and the like, and the product yield and the processing efficiency are improved.
The technical scheme includes that the through hole forming insert comprises a first insert and a second insert, the first insert and the second insert are not in contact and are respectively used for forming a first groove and a second groove on two sides of a formed product, a first insert pin is arranged in the first insert, a second insert pin is arranged in the second insert, the first insert pin and the second insert pin penetrate through the groove bottoms of the first groove and the second groove respectively and are abutted against each other, a mandril and a disc spring are further arranged in the first insert, and two sides of the disc spring are abutted against the mandril and the first insert pin respectively.
Compared with the prior art, the through hole forming insert has the following advantages: the first insert and the second insert are used for forming grooves on two sides of a formed product; the first insert pin and the second insert pin in the first insert block and the second insert block jointly penetrate through the groove bottom of the groove and are mutually abutted, so that a through hole is formed in the groove, and glue overflow and burrs are prevented from being generated near the through hole; the belleville spring increases the pressure of the first insert pin to the second insert pin, and avoids the generation of flash due to the gap left between the abutting surfaces of the first insert pin and the second insert pin.
Preferably, the end surface of the first insert head is provided with a first insert groove, and the first insert pin penetrates through the groove bottom of the first insert groove and leaves a gap with the groove wall of the first insert groove. By adopting the structure, the grooves on two sides of the formed product are prevented from being communicated with each other, and a gap between the first insert pin and the groove wall of the first insert groove is enabled to be the hole wall of the through hole in the groove.
Preferably, a second insert groove is formed in the end face of the second insert head, and the second insert pin penetrates through the groove bottom of the second insert groove and leaves a gap with the groove wall of the second insert groove. By adopting the structure, the grooves on two sides of the formed product are prevented from being communicated with each other, and a gap between the second insert pin and the groove wall of the second insert groove is enabled to be the hole wall of the through hole in the groove.
Preferably, the middle part of the second insert pin is provided with a reducing section, two sides of the reducing section are respectively cylinders with different diameters, the diameter of the tail end cylinder of the second insert pin is larger than that of the head end cylinder, and a second through hole matched with the shape of the second insert pin is arranged in the second insert block. With this structure, the position of the second insert pin in the second insert block can be restricted.
Preferably, the tail end of the second insert pin is provided with a limiting step surface for limiting, the tail end of the second insert pin is provided with a third step surface matched with the limiting step surface, and the limiting step surface abuts against the third step surface. With this structure, the position of the second insert pin in the second insert block can be restricted.
Preferably, the tail end of the first insert pin is provided with a limiting step surface for limiting, the first insert block is provided with a first step surface matched with the limiting step surface, and the limiting step surface abuts against the first step surface.
Preferably, one end of the ejector rod is provided with a limiting step surface for limiting, a second step surface matched with the limiting step surface is arranged in the first insert, and the limiting step surface abuts against the second step surface. With this structure, the position of the jack in the first insert can be restricted.
Preferably, the number of the disc springs is multiple, and the concave surfaces between every two disc springs are arranged oppositely. By adopting the structure, the pressure of the first insert pin to the second insert pin can be increased, and the flash caused by a gap left between the butt joint surfaces of the first insert pin and the second insert pin is avoided.
The invention aims to solve the technical problem of providing an injection mold, which can form a through hole in a groove of an injection product, and the formed through hole can not generate the phenomena of glue overflow, burrs, flash and the like, thereby improving the yield and the processing efficiency of the product.
The technical scheme of the invention is to provide an injection mold, which comprises the through hole forming insert.
Compared with the prior art, the injection mold has the following advantages: the groove can be formed in the injection molding product, the through hole can be formed in the groove, glue overflow and burrs can be avoided being generated near the through hole, and flash can be avoided being generated in the through hole.
Drawings
Fig. 1 is a schematic view of a connecting structure of a through-hole molding insert and a molded product according to the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a sectional view taken along the direction B-B of fig. 2.
Fig. 4 is a partially enlarged view of the area a in fig. 3.
As shown in the figure: 1. the novel die comprises a formed product, 1-1 parts of a first groove, 1-2 parts of a second groove, 1-3 parts of a groove through hole, 2 parts of a first insert, 2-1 parts of a first insert pin, 2-2 parts of a push rod, 2-3 parts of a disc spring, 2-4 parts of a first step surface, 2-5 parts of a second step surface, 2-6 parts of a first insert groove, 3 parts of a second insert, 3-1 parts of a second insert pin, 3-2 parts of a second insert groove, 3-3 parts of a third step surface.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.
In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.
As shown in fig. 1 to 3, the through-hole molding insert of the present invention is used for molding a groove in a molded product 1, wherein the through-hole molding insert includes a first insert 2 and a second insert 3, the first insert 2 and the second insert 3 are respectively located at both sides of the molded product 1, and a first groove 1-1 and a second groove 1-2 are correspondingly molded on the molded product 1. The first insert 2 is internally provided with a first insert pin 2-1, the second insert 3 is internally provided with a second insert pin 3-1, the end part of the insert or the insert pin, which is contacted with the molded product 1, is appointed to be a head part, and the end part of the insert or the insert pin, which is back to the molded product 1, is appointed to be a tail part. A gap is reserved between the heads of the first insert 2 and the second insert 3, so that the bottoms of the first groove 1-1 and the second groove 1-2 are not communicated with each other. The end surface of the head of the first insert 2 is provided with a first insert groove 2-6, the end surface of the head of the second insert 3 is provided with a second insert groove 3-2, and the first insert groove 2-6 and the second insert groove 3-2 enable a spacer block to be formed between the bottoms of the first groove 1-1 and the second groove 1-2. The first insert 2 is provided with a first through hole between the tail part of the first insert and the groove bottom of the first insert groove 2-6, the first insert pin 2-1 is arranged in the first through hole, and the head part of the first insert pin 2-1 extends out of the first through hole and has a clearance with the groove wall of the first insert groove 2-6. The second insert 3 is provided with a second through hole between the tail part of the second insert and the groove bottom of the second insert groove 3-2, the second insert pin 3-1 is arranged in the second through hole, and the head part of the second insert pin 3-1 extends out of the second through hole and a gap is reserved between the head part and the groove wall of the second insert groove 3-2. The head of the first insert pin 2-1 is abutted against the head of the second insert pin 3-1, so that a groove through hole 1-3 is formed in the isolating block, and a gap between the first insert pin 2-1 and the groove wall of the first insert groove 2-6 and a gap between the second insert pin 3-1 and the groove wall of the second insert groove 3-2 are respectively formed into the hole wall of the groove through hole 1-3. The middle part of the second insert pin 3-1 is provided with a reducing section, two sides of the reducing section are respectively provided with cylinders with different diameters, the diameter of the tail end cylinder of the second insert pin 3-1 is larger than that of the head end cylinder, and the tail end of the second insert pin 3-1 is also provided with a limiting step surface for limiting; the shape of the second through hole is matched with that of the second insert pin 3-1, a third step surface 3-3 is arranged at the tail end of the second insert pin 3 of the second through hole, and a limiting step surface at the tail end of the second insert pin 3-1 abuts against the third step surface 3-3, so that the depth of the second insert pin 3-1 penetrating the second through hole is limited.
As shown in fig. 4, the first insert 2 has a first step surface 2-4 and a second step surface 2-5 provided in the first through hole. The tail end of the first insert pin 2-1 is provided with a limiting step surface for limiting, and the limiting step surface is abutted against the first step surface 2-4, so that the depth of the first insert pin 2-1 penetrating through the first through hole is limited. The first through hole is also provided with a top rod 2-2, one end of the top rod 2-2 is also provided with a limiting step surface, the limiting step surface is abutted against the second step surface 2-5, and the other end of the top rod 2-2 is abutted against the tail end of the first insert pin 2-1, so that the depth of the top rod 2-2 pushing the first insert pin 2-1 to penetrate through the first through hole is limited. Two disc springs 2-3 are further arranged between the ejector rod 2-2 and the tail end of the first insert pin 2-1, the ejector rod 2-2 is tightly pressed against the disc springs 2-3, and the disc springs 2-3 push the first insert pin 2-1 to penetrate through the first through hole. The disc springs 2-3 are flaky, the middle of each disc spring is provided with an opening, each disc spring is integrally provided with a sunken structure, the sunken surfaces of the two disc springs 2-3 are arranged oppositely, and two outward convex surfaces are respectively abutted against one end of the ejector rod 2-2 and the tail of the first insert pin 2-1. The disc spring 2-3 can increase the acting force of the first insert pin 2-1 penetrating through the first through hole and abutting against the head of the second insert pin 3-1, so that the first insert pin 2-1 and the second insert pin 3-1 are pressed tightly, and the phenomenon that a gap is left between the first insert pin 2-1 and the second insert pin 3-1 to cause flash in the generated groove through hole 1-3 is avoided.
When the through hole forming insert is applied to an injection mold, a first insert 2 and a second insert 3 respectively form a first groove 1-1 and a second groove 1-2 on a formed product 1 correspondingly when an injection product is formed, and acting force is applied to a top rod 2-2, so that a disc spring 2-3 presses a first insert needle 2-1 to penetrate through a first through hole and abut against the head of a second insert needle 3-1, and a groove through hole 1-3 is formed in the groove bottom of the first groove 1-1 and the second groove 1-2. The first insert pin 2-1 and the second insert pin 3-1 are mutually pressed, so that a gap is prevented from being left between the first insert pin 2-1 and the second insert pin 3-1, and flash is prevented from being generated in the groove through hole 1-3; and because the first insert pin 2-1 is butted with the second insert pin 3-1 to form a through hole, glue overflow and burrs are avoided near the groove through hole 1-3.
The above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.
Claims (8)
1. A through hole forming insert is characterized by comprising a first insert (2) and a second insert (3), wherein the first insert (2) and the second insert (3) are not in contact and are respectively used for forming a first groove (1-1) and a second groove (1-2) on two sides of a formed product, a first insert pin (2-1) is arranged in the first insert (2), a second insert pin (3-1) is arranged in the second insert (3), the first insert pin (2-1) and the second insert pin (3-1) respectively penetrate through the groove bottoms of the first groove (1-1) and the second groove (1-2) and are mutually abutted, a mandril (2-2) and a belleville spring (2-3) are further arranged in the first insert (2), and two sides of the belleville spring (2-3) are respectively abutted against the mandril (2-2) and the first insert pin (2-1); the middle part of the second insert pin (3-1) is provided with a reducing section, two sides of the reducing section are respectively provided with cylinders with different diameters, the diameter of the tail end cylinder of the second insert pin (3-1) is larger than that of the head end cylinder, and a second through hole matched with the shape of the second insert pin (3-1) is arranged in the second insert pin (3).
2. The through-hole forming insert according to claim 1, wherein the first insert groove (2-6) is provided on the end surface of the head of the first insert (2), and the first insert pin (2-1) penetrates the groove bottom of the first insert groove (2-6) with a clearance from the groove wall of the first insert groove (2-6).
3. The through-hole forming insert according to claim 1, wherein the second insert pocket (3-2) is provided on the end surface of the head of the second insert (3), and the second insert pin (3-1) penetrates the pocket bottom of the second insert pocket (3-2) with a clearance from the pocket wall of the second insert pocket (3-2).
4. The through-hole forming insert according to claim 1, wherein the tail end of the second insert (3-1) is provided with a limit step surface for limiting, and the tail end of the second insert (3) is provided with a third step surface (3-3) matching with the limit step surface, and the limit step surface abuts against the third step surface (3-3).
5. The through-hole forming insert according to claim 1, wherein the tail end of the first insert (2-1) is provided with a limit step surface for limiting, and the first insert (2) is provided with a first step surface (2-4) matching with the limit step surface, and the limit step surface abuts against the first step surface (2-4).
6. The through-hole forming insert according to claim 1, wherein one end of the ejector pin (2-2) is provided with a limit step surface for limiting, and the first insert (2) is provided with a second step surface (2-5) matched with the limit step surface, and the limit step surface abuts against the second step surface (2-5).
7. The insert according to claim 1, wherein the plurality of disc springs (2-3) are arranged such that the concave surfaces of the disc springs (2-3) are opposite to each other.
8. An injection mold comprising the through-hole molding insert of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720237.2A CN111590831B (en) | 2020-07-24 | 2020-07-24 | Through-hole forming insert and injection mold with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720237.2A CN111590831B (en) | 2020-07-24 | 2020-07-24 | Through-hole forming insert and injection mold with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111590831A CN111590831A (en) | 2020-08-28 |
| CN111590831B true CN111590831B (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010720237.2A Active CN111590831B (en) | 2020-07-24 | 2020-07-24 | Through-hole forming insert and injection mold with same |
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| CN (1) | CN111590831B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113103625B (en) * | 2021-03-03 | 2022-11-22 | 东风柳州汽车有限公司 | Mold mechanism for molding SMC parts |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5633739B2 (en) * | 2010-10-29 | 2014-12-03 | アイシン精機株式会社 | Impeller molding equipment |
| FR2980999B1 (en) * | 2011-10-11 | 2014-05-09 | Parker Hannifin Mfg France Sas | METHOD FOR MANUFACTURING A PLASTIC FITTING AND CONNECTION THUS OBTAINED |
| CN108673834A (en) * | 2018-06-26 | 2018-10-19 | 吴中区甪直磊鑫模具厂 | The easily demoulding injection mold for being used to prepare the internal moulding with through-hole |
| CN209440674U (en) * | 2018-12-26 | 2019-09-27 | 天津瑞福天科模具有限公司 | A kind of sleeve type injection mold mold insert |
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| CN111590831A (en) | 2020-08-28 |
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