Multi-cavity synchronous lateral injection composite hot nozzle

Abstract

This utility model discloses a multi-cavity synchronous lateral injection composite hot nozzle, relating to the field of hot nozzle technology. It includes a flange, inside which a hot nozzle mechanism is installed for multi-cavity synchronous lateral injection. The hot nozzle mechanism includes a disassembly unit and a multi-cavity synchronous lateral unit. The multi-cavity synchronous lateral unit is located at the bottom of the disassembly unit and includes a lower body of the hot nozzle. The lower body has four sets of flow channel manifolds inside, and nozzle tips are fixedly installed on the outer side of the flow channel manifolds by four sets of threaded sleeves. This enables multi-cavity synchronous lateral injection. By having four symmetrically distributed flow channel manifolds inside the lower body of the hot nozzle, and using the threaded sleeves to fix the nozzle tips, the melt flows from the hot runner through the manifolds and is injected synchronously into each cavity with equal length paths and equal resistance. This design eliminates the problem of uneven filling time and pressure caused by path differences in traditional hot nozzles, significantly reducing product weight differences and appearance defects, and ensuring consistent molding quality in multi-cavity injection molding.

Description

Technical Field

[0001] This utility model relates to the field of composite hot nozzle technology for glue injection, specifically a multi-cavity synchronous lateral glue injection composite hot nozzle. Background Technology

[0002] The composite hot runner nozzle is a high-end hot runner system used in injection molds, mainly for achieving efficient and precise injection of glue into multi-cavity molds.

[0003] According to the patent titled "Multi-point Side-Injection Hot Nozzle Structure and Hot Runner System" (Patent Publication No.: CN212194030U, Patent Publication Date: 2020-12-22), the system includes a hot nozzle body and a nozzle core. The nozzle core is located at one end of the hot nozzle body and is trumpet-shaped with multiple nozzle tips arranged circumferentially along its circumference. Each nozzle tip has an injection port at its bottom, and a side injection port is provided between any two adjacent nozzle tips. This utility model also discloses a hot runner system, including a mold, a hot nozzle frame, and the aforementioned multi-point side-injection hot nozzle structure. The mold includes a front mold and a rear mold that cooperate with each other. The hot nozzle frame is located on the front mold and forms a cavity within it. The multi-point side-injection hot nozzle structure is located within the cavity. The multi-point side-injection hot nozzle structure includes a hot nozzle body and a nozzle core, which cooperate with the hot nozzle frame. The structure is simple, reduces material costs, decreases mold size, and improves the aesthetic appearance of the product.

[0004] Based on the aforementioned existing technology, the current multi-cavity synchronous side-injection composite hot nozzle still has the following problems: the path length, resistance, and shear / temperature rise experienced by the melt inside the traditional hot nozzle to reach different cavities are different, resulting in significant differences in filling time, pressure, and final product quality. Therefore, this utility model provides a multi-cavity synchronous side-injection composite hot nozzle. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a multi-cavity synchronous lateral injection composite hot nozzle, which solves the following problems that still exist in existing multi-cavity synchronous lateral injection composite hot nozzles: the path length, resistance, and shear / temperature rise experienced by the melt inside the traditional injection composite hot nozzle to reach different cavities are different, resulting in significant differences in filling time, pressure, and final product quality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-cavity synchronous lateral dispensing composite hot nozzle, comprising a flange, wherein a hot nozzle mechanism is provided inside the flange for realizing multi-cavity synchronous lateral dispensing, the hot nozzle mechanism comprising:

[0007] The disassembly and assembly unit is located inside the flange and is used to achieve overall disassembly and assembly, facilitating maintenance and replacement;

[0008] The multi-cavity synchronous lateral unit is located at the bottom of the disassembly unit. It includes a hot nozzle lower body, and the interior of the hot nozzle lower body is provided with four sets of flow channel manifolds. The nozzle tip is fixedly installed on the outside of the flow channel manifolds by four sets of screw sleeves, so as to realize multi-cavity synchronous lateral glue injection.

[0009] Preferably, a positioning seat is fixedly installed at the bottom of the lower body of the hot nozzle to fix the position of the nozzle tip.

[0010] Preferably, a pressure-bearing pad is fixedly installed at the bottom of the positioning seat by a screw.

[0011] Preferably, the disassembly unit includes a housing fixedly installed inside the flange, a hot nozzle upper body is fixedly installed on the top of the disassembly unit by bolts, a hot runner is fixedly installed inside the hot nozzle upper body, and a heating coil is fixedly installed between the hot runner and the housing.

[0012] Preferably, four fixing blocks are installed in the outer circumferential array of the lower body of the hot nozzle, and a rotating screw is rotatably installed at the bottom of the fixing blocks. Four sets of nut seats are installed in the top circumferential array of the lower body of the hot nozzle, and the bottom end of the rotating screw is threadedly installed inside the nut seat, thereby realizing a fixed connection between the hot runner and the lower body of the hot nozzle.

[0013] Preferably, heating rods are symmetrically inserted and installed at the top of the lower body of the hot nozzle, and a set of cover ears are symmetrically fixedly installed on the surface of the outer shell, with the top of the heating rod inserted into the inside of the cover ears to fix the heating rod.

[0014] This invention provides a multi-cavity synchronous lateral dispensing composite hot nozzle. Compared with the prior art, it has the following advantages:

[0015] 1. This multi-cavity synchronous side-injection composite hot nozzle features four symmetrically distributed flow channel manifolds inside the lower body of the nozzle, secured by threaded sleeves. This allows the melt to flow synchronously from the hot runner through the manifolds, injecting into each cavity with equal length paths and uniform resistance. This design eliminates the uneven filling time and pressure issues caused by path differences in traditional hot nozzles, significantly reducing product weight variations and appearance defects, and ensuring consistent molding quality in multi-cavity injection molding.

[0016] 2. This multi-cavity synchronous side-injection composite hot nozzle adopts a threaded connection mechanism between a rotating screw and a nut seat, combined with a detachable positioning seat, pressure pad, and nozzle tip, enabling quick assembly and disassembly of the hot nozzle mechanism. Maintenance does not require complete mold disassembly; simply rotating the screw separates the upper and lower parts of the hot nozzle, significantly reducing downtime for nozzle tip replacement or flow channel cleaning, and lowering maintenance costs. Attached Figure Description

[0017] Figure 1 This is a right-side perspective view of the structure of this utility model;

[0018] Figure 2 This is a front sectional perspective view of the present invention.

[0019] Figure 3 This is a partial three-dimensional structural view of the front cross-section of this utility model.

[0020] Figure 4 This is a partial three-dimensional structural view of the front cross-section of this utility model;

[0021] Figure 5 This is a right-side sectional perspective view of the present invention.

[0022] In the diagram: 1-Flange, 2-Heating nozzle mechanism, 21-Disassembly and assembly unit, 211-Outer shell, 212-Heating nozzle upper body, 213-Hot runner, 214-Heating coil, 215-Fixing block, 216-Rotating screw, 217-Nut seat, 218-Cover lug, 22-Multi-cavity synchronous lateral unit, 221-Heating nozzle lower body, 222-Flow channel manifold, 223-Positioning seat, 224-Nozzle tip, 225-Threaded sleeve, 226-Screw, 227-Pressure pad, 228-Heating rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 This utility model provides a technical solution:

[0025] A multi-cavity synchronous lateral dispensing composite hot nozzle includes a flange 1, and a hot nozzle mechanism 2 is provided inside the flange 1 for realizing multi-cavity synchronous lateral dispensing. The hot nozzle mechanism 2 includes:

[0026] The disassembly and assembly unit 21 is located inside the flange 1 and is used to achieve overall disassembly and assembly, facilitating maintenance and replacement;

[0027] The multi-cavity synchronous lateral unit 22 is located at the bottom of the disassembly and assembly unit 21. It includes a hot nozzle lower body 221, and four sets of flow channel manifolds 222 are opened inside the hot nozzle lower body 221. The nozzle tip 224 is fixedly installed on the outside of the flow channel manifolds 222 by four sets of screw sleeves 225, so as to realize multi-cavity synchronous lateral glue injection.

[0028] In this embodiment, a positioning seat 223 is fixedly installed at the bottom of the lower body 221 of the hot nozzle to fix the position of the nozzle tip 224.

[0029] The positioning seat 223 is fixed to the bottom of the lower body 221 of the hot nozzle, directly constraining the radial position of the nozzle tip 224.

[0030] In this embodiment, a pressure pad 227 is fixedly installed at the bottom of the positioning seat 223 by a screw 226.

[0031] The pressure pad 227 is fixed to the bottom of the positioning seat 223 by the screw 226 to form a pressure buffer layer.

[0032] In this embodiment, the disassembly unit 21 includes a housing 211 fixedly installed inside the flange 1. A hot nozzle upper body 212 is fixedly installed on the top of the disassembly unit 21 by bolts, and a hot runner 213 is fixedly installed inside the hot nozzle upper body 212. A heating coil 214 is fixedly installed between the hot runner 213 and the housing 211.

[0033] The heating coil 214 bidirectionally heats the outer shell 211 and the hot runner 213, eliminating the temperature gradient when the melt flows through it.

[0034] In this embodiment, four fixing blocks 215 are installed in an outer circumferential array on the lower body 221 of the hot nozzle, and a rotating screw 216 is rotatably installed at the bottom of the fixing blocks 215. Four sets of nut seats 217 are installed in an upper circumferential array on the lower body 221 of the hot nozzle, and the bottom end of the rotating screw 216 is threadedly installed inside the nut seat 217, thereby realizing a fixed connection between the hot runner 213 and the lower body 221 of the hot nozzle.

[0035] The hot nozzle mechanism 2 is quickly assembled and disassembled by employing a threaded connection mechanism between the rotating lead screw 216 and the nut seat 217, combined with a detachable positioning seat 223, pressure pad 227, and nozzle tip 224. Maintenance does not require complete mold disassembly; simply rotating the lead screw separates the upper nozzle body 212 and the lower nozzle body 221, significantly reducing downtime for nozzle tip replacement or flow channel cleaning and lowering maintenance costs.

[0036] In this embodiment, heating rods 228 are symmetrically inserted and installed at the top of the lower body 221 of the hot nozzle, and a set of cover ears 218 are symmetrically fixedly installed on the surface of the outer shell 211, and the top of the heating rod 228 is inserted into the inside of the cover ear 218 to fix the heating rod 228.

[0037] The heating rod 228 is inserted directly into the core of the lower part of the hot nozzle, and the precise temperature control manifold 222 maintains the fluidity of the melt.

[0038] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] During operation, firstly, the upper body 212 of the hot nozzle is fixedly installed on the upper part of the flange 1 with bolts, so that the hot runner 213 is installed inside the outer shell 211. The heating coil 214 is installed between the outer shell 211 and the hot runner 213. The heating rod 228 is inserted into the interior of the lower body 221 of the hot nozzle. The nut seat 217 is rotated by rotating the screw 216 to fix the hot runner 213 to the lower body 221 of the hot nozzle. The cover ear 218 is placed on the upper part of the heating rod 228. The positioning seat 223 and the pressure pad 227 are installed below the lower body 221 of the hot nozzle by the screw 226. The nozzle tip 224 is fixedly installed inside the lower body 221 of the hot nozzle by the screw sleeve 225, so that the internal flow channel of the nozzle tip 224 is connected to the flow channel manifold 222.

[0040] Then, the melt enters the interior of the flow channel manifold 222 through the flow channel of the hot nozzle body 212 and the hot runner 213, and is discharged through the interior of the flow channel tip 224 of the flow channel manifold 222.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-cavity synchronous lateral injection composite hot nozzle, including a flange (1), characterized in that: The flange (1) is equipped with a hot nozzle mechanism (2) for realizing multi-cavity synchronous lateral glue injection. The hot nozzle mechanism (2) includes: The disassembly unit (21) is located inside the flange (1) and is used to achieve overall disassembly and assembly, which facilitates maintenance and replacement; The multi-cavity synchronous lateral unit (22) is located at the bottom of the disassembly unit (21), including a hot nozzle lower body (221), and four sets of flow channel manifolds (222) are opened inside the hot nozzle lower body (221). The nozzle tip (224) is fixedly installed on the outside of the flow channel manifold (222) by four sets of screw sleeves (225), so as to realize multi-cavity synchronous lateral glue injection.

2. The multi-cavity synchronous lateral injection composite hot nozzle according to claim 1, characterized in that: A positioning seat (223) is fixedly installed at the bottom of the lower body (221) of the hot nozzle to fix the position of the nozzle tip (224).

3. The multi-cavity synchronous lateral injection composite hot nozzle according to claim 2, characterized in that: The bottom of the positioning seat (223) is fixedly installed with a pressure pad (227) by a screw (226).

4. The multi-cavity synchronous lateral injection composite hot nozzle according to claim 1, characterized in that: The disassembly unit (21) includes a housing (211) fixedly installed inside the flange (1). A hot nozzle upper body (212) is fixedly installed on the top of the disassembly unit (21) by bolts. A hot runner (213) is fixedly installed inside the hot nozzle upper body (212). A heating coil (214) is fixedly installed between the hot runner (213) and the housing (211).

5. The multi-cavity synchronous lateral injection composite hot nozzle according to claim 4, characterized in that: The lower body of the hot nozzle (221) is equipped with four fixed blocks (215) in an outer circumferential array, and a rotating screw (216) is rotatably installed at the bottom of the fixed blocks (215). The lower body of the hot nozzle (221) is equipped with four sets of nut seats (217) in a top circumferential array, and the bottom end of the rotating screw (216) is threadedly installed inside the nut seat (217), thereby realizing a fixed connection between the hot runner (213) and the lower body of the hot nozzle (221).

6. The multi-cavity synchronous lateral injection composite hot nozzle according to claim 4, characterized in that: Heating rods (228) are symmetrically inserted into the top of the lower body (221) of the heating nozzle, and a set of cover ears (218) are symmetrically fixed on the surface of the outer shell (211), and the top of the heating rod (228) is inserted into the inside of the cover ear (218) to fix the heating rod (228).

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