Injection molding mechanism with ox horn pouring function and injection molding mold
By employing an integrally molded horn-shaped injection part and an arc-shaped groove design in the injection mold, the problems of structural strength and appearance quality of the insert were solved, achieving high-quality injection molding without parting lines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-04-14
AI Technical Summary
In existing injection molds, the split design of inserts results in poor product appearance quality and low structural strength, especially in thin and light products where parting lines are easily formed.
The design employs a one-piece molded horn-shaped injection molded part and a one-piece blind insert. The horn-shaped injection molded part is located in an arc-shaped groove, and there is a preset gap between the arc-shaped groove and the gate to avoid contact with the product. The one-piece blind insert replaces the split two-half structure.
It improves the structural strength of the insert, avoids the formation of parting lines on the product surface, and enhances the product's appearance quality.
Smart Images
Figure CN224116620U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of injection molds, and in particular to an injection molding mechanism and an injection mold with a horn-shaped gating system. Background Technology
[0002] An injection mold is a molding tool made of precision-machined steel. It injects molten plastic into a cavity under high temperature and pressure, and after cooling, a product of a specific shape is obtained.
[0003] In existing injection molds, there is an increasing demand for automated molding. For some thin and light injection molded products (such as nameplates or mobile phone casings), horn gates are one method to achieve automated molding. A horn gate is a cone-shaped structure with a smooth, rounded curve resembling a bull's horn, gradually decreasing in cross-sectional size. The smaller end connects to the bottom of the mold cavity. When the gate exits the mold, ejector pins push it out, causing deformation and automatic breakage of the gate. Horn gates are generally used for inserts and injection molded parts, such as... Figure 1 As shown, in the prior art, the insert is embedded in the mold core in a split two-part manner. One end of the injection part passes through the insert and abuts against the bottom surface of the cavity, while the end of the insert also abuts against the cavity. This causes the part that abuts against the insert to form a parting line when the product is formed in the cavity, resulting in poor appearance quality. In addition, the split design of the insert has the problem of low structural strength.
[0004] Therefore, there is an urgent need for a mold structure that can avoid parting lines on the product appearance and has high strength in the insert structure. Utility Model Content
[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an injection molding mechanism and injection mold with a horn-shaped injection gate that can avoid the formation of parting lines on the product appearance and has high strength of the insert structure.
[0006] The purpose of this disclosure is achieved through the following technical solution:
[0007] An injection molding mechanism with a horn-shaped injection gate includes an upper mold and a lower mold. The upper mold contains an upper mold core, and the lower mold contains a lower mold core. The upper and lower mold cores are positioned opposite each other. Both the upper and lower molds are connected to a driving component to allow them to move closer or further apart. The upper and lower mold cores together form an injection cavity.
[0008] The injection molding mechanism also includes a horn-shaped injection assembly, which includes a horn-shaped injection part and an integrated blind insert. The lower mold core has an insert groove, and the integrated blind insert is inserted into the insert groove. The upper mold core and the lower mold core together form a receiving groove. The horn-shaped injection part is located in the receiving groove and is used to communicate with the injection runner. The integrated blind insert has an arc-shaped groove, and the lower mold core has a gate that communicates with the injection cavity. The arc-shaped groove and the gate have a preset gap. Part of the structure of the horn-shaped injection part is located in the arc-shaped groove so that the end of the horn-shaped injection part is located at the gate.
[0009] In one embodiment, the height of the integral blind insert on the side away from the gate is greater than the height on the side closer to the gate.
[0010] In one embodiment, the horn-shaped injection component includes an injection body and a horn body connected together. The injection body is located in the receiving groove and is used to communicate with the injection channel. A portion of the horn body is located in the arc-shaped groove, and the end of the horn body is located in the gate.
[0011] In one embodiment, the diameter of the horn body gradually decreases from the end closer to the glue-filled body to the end farther away from the glue-filled body.
[0012] In one embodiment, the glue-injecting body and the horn body are integrally molded structures.
[0013] In one embodiment, there are two horn bodies, which are spaced apart from the injection body. There are also two integral blind inserts and two gates, so that the horn bodies are correspondingly embedded in the integral blind inserts and the ends of the horn bodies are correspondingly located in the gates.
[0014] In one embodiment, the cross-section of the injection body is I-shaped.
[0015] In one embodiment, the number of injection cavities is at least two, and the two injection cavities are symmetrically arranged with respect to the horn-shaped gating assembly, such that the horn-shaped gating assembly is located between the two injection cavities.
[0016] In one embodiment, the surface of the integral blind insert is flush with the surface of the lower mold core.
[0017] An injection mold includes an injection mechanism with a horn-shaped gating system as described in any of the above embodiments.
[0018] Compared with the prior art, this disclosure has at least the following advantages:
[0019] In the aforementioned injection molding mechanism with a horn-shaped injection gate, when the upper and lower molds move towards each other and abut, the upper and lower mold cores together form an injection cavity and a receiving groove. The horn-shaped injection part is located within the receiving groove, and the integrated blind insert is located within the insert groove of the lower mold core. The integrated blind insert has an arc-shaped groove, and part of the structure of the horn-shaped injection part is located within the arc-shaped groove. The end of the horn-shaped injection part is located at the gate, allowing the horn-shaped injection part to inject the resin from the injection channel into the injection cavity. Specifically, the integrated blind insert adopts a one-piece molding structure, that is, it no longer uses a split two-half structure, which makes the structural strength of the integrated blind insert higher. Furthermore, there is a preset gap between the arc-shaped groove of the integrated blind insert and the gate, meaning that the integrated blind insert will not abut against the product in the injection cavity. This prevents the formation of a parting line in the molded product, improving the appearance quality of the product. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a cow horn inlay in the prior art;
[0022] Figure 2 This is a schematic diagram of an injection molding mechanism with a bull-horn gating system in one embodiment;
[0023] Figure 3 for Figure 2 Another schematic diagram of an injection molding mechanism with a horn-shaped gating system is shown.
[0024] Figure 4 for Figure 2 Another schematic diagram of an injection molding mechanism with a bull-horn gating system is shown;
[0025] Figure 5 for Figure 2 The diagram shows a structural schematic of a horn-shaped injection molding assembly with a horn-shaped injection gate.
[0026] Figure 6 for Figure 4 The diagram shows a cross-sectional view of an injection molding mechanism with a horn-shaped gating system.
[0027] Figure 7 for Figure 2 The diagram shows a structural schematic of an integral blind insert with a horn-shaped injection molding mechanism.
[0028] Figure 8 for Figure 2 The diagram shows a structural schematic of a horn-shaped injection molded part with a horn-shaped injection gate. Detailed Implementation
[0029] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.
[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0032] This disclosure provides an injection molding mechanism with a horn-shaped gating system, including an upper mold, a lower mold, and a horn-shaped gating assembly. The upper mold has an upper mold core, and the lower mold has a lower mold core, which are disposed opposite to each other. Both the upper and lower molds are connected to a driving component to allow them to move closer or further apart. The upper and lower mold cores together form an injection cavity. The horn-shaped gating assembly includes a horn-shaped injection part and an integrated blind insert. The lower mold core has an insert groove. The integrated blind insert is embedded in the insertion groove. The upper mold core and the lower mold core together form a receiving groove. The horn-shaped injection molded part is located in the receiving groove and is used to communicate with the injection channel. The integrated blind insert has an arc-shaped groove. The lower mold core has a gate that communicates with the injection cavity. The arc-shaped groove and the gate have a preset gap. Part of the structure of the horn-shaped injection molded part is located in the arc-shaped groove so that the end of the horn-shaped injection molded part is located at the gate.
[0033] In the aforementioned injection molding mechanism with a horn-shaped injection gate, when the upper and lower molds move towards each other and abut, the upper and lower mold cores together form an injection cavity and a receiving groove. The horn-shaped injection part is located within the receiving groove, and the integrated blind insert is located within the insert groove of the lower mold core. The integrated blind insert has an arc-shaped groove, and part of the structure of the horn-shaped injection part is located within the arc-shaped groove. The end of the horn-shaped injection part is located at the gate, allowing the horn-shaped injection part to inject the resin from the injection channel into the injection cavity. Specifically, the integrated blind insert adopts a one-piece molding structure, that is, it no longer uses a split two-half structure, which makes the structural strength of the integrated blind insert higher. Furthermore, there is a preset gap between the arc-shaped groove of the integrated blind insert and the gate, meaning that the integrated blind insert will not abut against the product in the injection cavity. This prevents the formation of a parting line in the molded product, improving the appearance quality of the product.
[0034] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:
[0035] like Figures 2 to 8 As shown, an injection molding mechanism 10 with a horn-shaped gating system in one embodiment includes an upper mold 100, a lower mold 200, and a horn-shaped gating assembly 300. The upper mold 100 has an upper mold core 110, and the lower mold 200 has a lower mold core 210. The upper mold core 110 and the lower mold core 210 are arranged opposite to each other. Both the upper mold 100 and the lower mold 200 are used to connect with a driving component so that the upper mold 100 and the lower mold 200 are close to or far away from each other. The upper mold core 110 and the lower mold core 210 together form an injection cavity so that the product 10a is formed in the injection cavity.
[0036] Furthermore, the horn-shaped injection assembly 300 includes a horn-shaped injection part 310 and an integrated blind insert 320. The lower mold core 210 has an insert groove, and the integrated blind insert 320 is inserted into the insert groove. The upper mold core 110 and the lower mold core 210 together form a receiving groove, and the horn-shaped injection part 310 is located in the receiving groove. The horn-shaped injection part 310 is used to communicate with the injection channel. The integrated blind insert 320 has an arc-shaped opening. The lower mold core 210 has a gate 211 that communicates with the injection cavity. The arc-shaped groove 321 and the gate 211 have a preset gap, that is, the integral blind insert 320 will not abut against the product 10a in the injection cavity. Part of the structure of the horn injection part 310 is located in the arc-shaped groove 321 so that the end of the horn injection part 310 is located at the gate 211, thereby injecting the glue from the injection channel into the injection cavity.
[0037] In this embodiment, the integrated blind insert 320 is embedded in the insertion groove of the lower mold core 210. The integrated blind insert 320 adopts an integral structure, replacing the traditional split two-part structure, which improves the structural strength of the integrated blind insert 320. The integrated blind insert 320 has an arc-shaped groove 321, and the lower mold core 210 has a gate 211 that communicates with the injection cavity. There is a preset gap between the arc-shaped groove 321 and the gate 211. Part of the structure of the horn injection molding part 310 is located in the arc-shaped groove 321. The end of 310 protrudes into the arc groove 321, so that the end of the horn injection part 310 is located at the gate 211. The horn injection part 310 is used to inject the glue in the injection channel into the injection cavity, so that the product 10a is formed in the injection cavity. Since there is a preset gap between the arc groove 321 of the integral blind insert 320 and the gate 211, that is, the integral blind insert 320 will not abut against the molded product 10a, so that the appearance of the product 10a will not form a parting line, thereby improving the quality of the product 10a.
[0038] In the aforementioned injection molding mechanism 10 with a horn-shaped injection gate, when the upper mold 100 and the lower mold 200 move towards each other and abut against each other, the upper mold core 110 and the lower mold core 210 together form an injection cavity and a receiving groove. The horn-shaped injection part 310 is located in the receiving groove, and the integrated blind insert 320 is located in the insert groove of the lower mold core 210. The integrated blind insert 320 has an arc-shaped groove 321. Part of the structure of the horn-shaped injection part 310 is located in the arc-shaped groove 321, and the end of the horn-shaped injection part 310 is located at the gate 211, so that the horn-shaped injection part 310 injects the glue from the injection channel into the injection cavity. Specifically, the integrated blind insert 320 adopts an integrated molding structure, that is, it no longer adopts a split two-half structure, which makes the integrated blind insert 320 structurally stronger. In addition, the arc groove 321 of the integrated blind insert 320 and the gate 211 have a preset gap, that is, the integrated blind insert 320 will not come into contact with the product 10a in the injection cavity. This prevents the molded product 10a from forming a parting line and improves the appearance quality of the product 10a.
[0039] like Figure 6 and Figure 7As shown, in one embodiment, the height of the integrated blind insert 320 on the side away from the gate 211 is greater than the height on the side closer to the gate 211. It is understood that the side of the integrated blind insert 320 away from the gate 211 abuts against the bottom of the horn-shaped injection molded part 310, causing a portion of the structure of the horn-shaped injection molded part 310 to be embedded in the arc-shaped groove 321 of the integrated blind insert 320. The height of the side of the integrated blind insert 320 closer to the gate 211 is less than the height of the side away from the gate 211, creating a gap between the side of the integrated blind insert 320 closer to the gate 211 and the gate 211. This prevents the product 10a in the injection cavity from contacting the integrated blind insert 320, thus avoiding the formation of parting lines on the surface of the product 10a.
[0040] like Figure 8 As shown, in one embodiment, the horn-shaped injection part 310 includes an injection body 311 and a horn body 312 connected to each other. The injection body 311 is located in the receiving groove and is used to communicate with the injection channel. A portion of the horn body 312 is located in the arc-shaped groove 321, and the end of the horn body 312 is located in the gate 211. In this embodiment, the injection body 311 communicates with the injection channel so that the glue enters the injection cavity after passing through the injection body 311 and the horn body 312. The horn body 312 is bent and located in the arc-shaped groove 321, and the end of the horn body 312 protrudes out of the arc-shaped groove 321 so that the end of the horn body 312 is located in the gate 211.
[0041] like Figure 8 As shown, in one embodiment, the diameter of the horn body 312 gradually decreases from the end near the injection body 311 to the end away from the injection body 311, so as to increase the pressure of the glue entering the injection cavity and make the product 10a formed in the injection cavity more full.
[0042] In one embodiment, the glue-injection body 311 and the horn body 312 are integrally molded. In this embodiment, the glue-injection body 311 and the horn body 312 adopt an integrally molded structure to make the structure between the glue-injection body 311 and the horn body 312 more compact and stronger.
[0043] In one embodiment, there are two horn bodies 312, spaced apart from the injection body 311. There are also two integral blind inserts 320 and two gates 211, so that the horn bodies 312 are correspondingly embedded in the integral blind inserts 320, and the ends of the horn bodies 312 are located within the gates 211. In this embodiment, two gates 211 are provided in one injection cavity to ensure fuller filling of the injection cavity with adhesive. Correspondingly, each gate 211 is provided with one horn body 312, and each horn body 312 is correspondingly embedded in the corresponding integral blind insert 320.
[0044] like Figure 8 As shown, in one embodiment, the cross-section of the injection body 311 is I-shaped. In this embodiment, there are two injection cavities, and the cross-section of the injection body 311 is I-shaped to accommodate the two sides of the injection body 311 communicating with the corresponding horn bodies 312, so that the horn bodies 312 on both sides are located in the corresponding gates 211, making the mold structure design more compact.
[0045] like Figure 4 As shown, in one embodiment, the number of injection molded cavities is at least two, and the two injection molded cavities are symmetrically arranged with respect to the horn-shaped gating assembly 300, so that the horn-shaped gating assembly 300 is located between the two injection molded cavities. In this embodiment, the number of injection molded cavities is four, and the injection molded cavities are paired, with a horn-shaped gating assembly 300 provided between every two injection molded cavities, so that one horn-shaped gating assembly 300 injects liquid into the injection molded cavities on both sides respectively.
[0046] like Figure 4 As shown, in one embodiment, the surface of the integral blind insert 320 is flush with the surface of the lower mold core 210, so that the integral blind insert 320 and the lower mold core 210 have a more flat structure.
[0047] This application also provides an injection mold, including the injection mechanism 10 with horn-shaped injection gate as described in any of the above embodiments.
[0048] Compared with the prior art, this disclosure has at least the following advantages:
[0049] In the aforementioned injection molding mechanism 10 with a horn-shaped injection gate, when the upper mold 100 and the lower mold 200 move towards each other and abut against each other, the upper mold core 110 and the lower mold core 210 together form an injection cavity and a receiving groove. The horn-shaped injection part 310 is located in the receiving groove, and the integrated blind insert 320 is located in the insert groove of the lower mold core 210. The integrated blind insert 320 has an arc-shaped groove 321. Part of the structure of the horn-shaped injection part 310 is located in the arc-shaped groove 321, and the end of the horn-shaped injection part 310 is located at the gate 211, so that the horn-shaped injection part 310 injects the glue from the injection channel into the injection cavity. Specifically, the integrated blind insert 320 adopts an integrated molding structure, that is, it no longer adopts a split two-half structure, which makes the integrated blind insert 320 structurally stronger. In addition, the arc groove 321 of the integrated blind insert 320 and the gate 211 have a preset gap, that is, the integrated blind insert 320 will not come into contact with the product 10a in the injection cavity. This prevents the molded product 10a from forming a parting line and improves the appearance quality of the product 10a.
[0050] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent disclosure should be determined by the appended claims.
Claims
1. An injection molding mechanism with a horn-shaped injection gate, comprising an upper mold and a lower mold, wherein the upper mold has an upper mold core, and the lower mold has a lower mold core, the upper mold core and the lower mold core are disposed opposite to each other, both the upper mold and the lower mold are used to connect to a driving component to allow the upper mold and the lower mold to move closer or further apart, and the upper mold core and the lower mold core together form an injection cavity, characterized in that... The injection molding mechanism also includes a horn-shaped injection assembly, which includes a horn-shaped injection part and an integrated blind insert. The lower mold core has an insert groove, and the integrated blind insert is inserted into the insert groove. The upper mold core and the lower mold core together form a receiving groove. The horn-shaped injection part is located in the receiving groove and is used to communicate with the injection runner. The integrated blind insert has an arc-shaped groove, and the lower mold core has a gate that communicates with the injection cavity. The arc-shaped groove and the gate have a preset gap. Part of the structure of the horn-shaped injection part is located in the arc-shaped groove so that the end of the horn-shaped injection part is located at the gate.
2. The injection molding mechanism with a bull horn-shaped injection gate according to claim 1, characterized in that, The height of the integrated blind insert on the side furthest from the gate is greater than the height on the side closest to the gate.
3. The injection molding mechanism with a bull horn-shaped injection gate according to claim 1, characterized in that, The horn-shaped injection component includes an injection body and a horn body connected together. The injection body is located in the receiving groove and is used to communicate with the injection channel. A portion of the horn body is located in the arc-shaped groove, and the end of the horn body is located in the gate.
4. The injection molding mechanism with a bull horn-shaped injection gate according to claim 3, characterized in that, The diameter of the horn body gradually decreases from the end closer to the glue-filled body to the end farther away from the glue-filled body.
5. The injection molding mechanism with a bull horn-shaped injection gate according to claim 3, characterized in that, The glue-injection body and the horn body are integrally molded structures.
6. The injection molding mechanism with a bull horn-shaped injection gate according to claim 3, characterized in that, The number of the bull horn bodies is two, and the two bull horn bodies are spaced apart on the injection body. The number of the integrated blind insert and the gate are both two, so that the bull horn bodies are correspondingly embedded in the integrated blind insert and the ends of the bull horn bodies are correspondingly located in the gate.
7. The injection molding mechanism with a bull horn-shaped injection gate according to claim 3, characterized in that, The cross-section of the injection body is "I" shaped.
8. The injection molding mechanism with a bull horn-shaped injection gate according to claim 1, characterized in that, The number of injection mold cavities is at least two, and the two injection mold cavities are symmetrically arranged with respect to the horn-shaped gating assembly, so that the horn-shaped gating assembly is located between the two injection mold cavities.
9. The injection molding mechanism with a bull horn-shaped injection gate according to claim 1, characterized in that, The surface of the integrated blind insert is flush with the surface of the lower mold core.
10. An injection mold, characterized in that, Including the injection molding mechanism with a horn-shaped injection port as described in any one of claims 1 to 9.