Hot nozzle assembly and hot runner system having the same

Abstract

The present invention specifically relates to a hot nozzle assembly and a hot runner system having the same. A hot nozzle assembly includes: a hot nozzle, a first diverter plate fixed to the bottom of the hot nozzle along the axial direction of the hot nozzle, and a nozzle tip, wherein a portion of the nozzle tip is fixed in the first diverter plate, and the other portion of the nozzle tip penetrates the outer wall of the first diverter plate and extends outward, and the outer peripheral wall of the other portion of the nozzle tip is matched with the circumferential clearance of the outer wall of the first diverter plate; wherein the hot nozzle, the first diverter plate, and the nozzle tip together form a penetrating hot runner. The hot nozzle assembly and the hot runner system provided by the present invention can adaptively make appropriate adjustments in the peripheral direction thereof when the nozzle tip expands, thereby avoiding the occurrence of glue leakage at the glue sealing part of the mold gate, and have the advantages of compact structure, easy installation, stability and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of hot runner molds, in particular to a hot nozzle assembly and a hot runner system having the same. Background Art

[0002] At present, the injection mold commonly used in the injection molding industry is the hot runner injection mold. Compared with ordinary molds, the plastic products injected through the hot runner system are of higher quality, and the hot runner system has the advantages of saving raw materials, improving production efficiency, and a high degree of automation.

[0003] The hot runner system will expand due to the increase in temperature during operation. In the existing technology, for the side-injection hot runner system, it is easy to cause the nozzle tip to expand and leak glue from the mold gate seal. Therefore, in order to solve the above problem, it is necessary to study the hot nozzle assembly and the hot runner system with it. Summary of the Invention

[0004] The present invention aims to provide a hot nozzle assembly which has a compact structure, is easy to install, and is stable and reliable.

[0005] In order to achieve the above objectives, one embodiment of the present invention provides a hot nozzle assembly, including: a hot nozzle; a first diverter plate, the first diverter plate is fixed to the bottom of the hot nozzle along the axial direction of the hot nozzle; and a nozzle tip, a part of the nozzle tip is fixed in the first diverter plate, and the other part of the nozzle tip passes through the outer wall of the first diverter plate and extends outward, and the outer peripheral wall of the other part of the nozzle tip is matched with the circumferential clearance of the outer wall of the first diverter plate; wherein the hot nozzle, the first diverter plate and the nozzle tip together form a penetrating hot runner.

[0006] As a further improvement of one embodiment of the present invention, the first diverter plate includes a mounting seat, a diverter plate body arranged in the mounting seat, and a fastener for fixing the mounting seat and the diverter plate body together, wherein the mounting seat has a mounting cavity with a bottom opening for installing the diverter plate body, and the bottom of the hot nozzle longitudinally passes through the mounting seat to be connected to the top of the diverter plate body.

[0007] As a further improvement of one embodiment of the present invention, a part of the nozzle tip forms a limiting boss portion, and another part of the nozzle tip forms a cylindrical portion passing through the mounting seat and a nozzle tip portion extending out of the mounting seat, and a limiting space is formed between the mounting seat and the diverter plate body to limit and fix the limiting boss portion.

[0008] As a further improvement of one embodiment of the present invention, the limiting boss portion includes a first inclined wall abutting against the outer side wall of the diverter plate body, a second wall abutting against the inner side wall of the mounting seat and arranged opposite to the first inclined wall, and a third wall connecting the first inclined wall and the second wall and limitingly cooperating with the inner top wall of the mounting seat, wherein the outer side wall of the diverter plate body, the inner side wall of the mounting seat and the inner top wall of the mounting seat together form the limiting space.

[0009] As a further improvement of one embodiment of the present invention, the outer side wall of the diverter plate body is inclined, and the distance between the outer side wall of the diverter plate body and the inner side wall of the mounting seat decreases from top to bottom.

[0010] As a further improvement of one embodiment of the present invention, the mounting seat and the diverter plate body are both configured as rectangular parallelepipeds, wherein a plurality of the nozzle tips are spaced apart along the length direction of the mounting seat, and the mounting seat includes a mounting seat body, and a dividing block formed by extending the inner side wall of the mounting seat body toward the diverter plate body and used to separate adjacent nozzle tips.

[0011] As a further improvement of one embodiment of the present invention, the hot runner sequentially includes a first runner formed by the hot nozzle and running from top to bottom, a diverter channel formed by the first diverter plate and connected to the first runner and having a diverter docking interface, and a second runner formed by the nozzle tip and docked with the diverter docking interface, wherein the diverter channel has multiple diverter docking interfaces, each of which is docked with one of the nozzle tips.

[0012] As a further improvement of an embodiment of the present invention, the diversion interface is coaxially arranged with the second flow channel, and the aperture of the diversion interface is smaller than the aperture of the glue inlet end of the second flow channel.

[0013] As a further improvement of one embodiment of the present invention, the nozzle tip has a plurality of glue outlet holes connected to the second flow channel, wherein the glue outlet holes are distributed at intervals along the circumference of the nozzle tip, and the hot nozzle assembly also includes a glue nourishing cap wrapped around the outer periphery of the nozzle tip and wrapping the glue outlet holes.

[0014] Another technical solution adopted in the present invention is:

[0015] A hot runner system comprises an injection nozzle, a second manifold plate arranged at the bottom of the injection nozzle, and a hot nozzle assembly as described above, wherein the hot nozzle is arranged at the bottom of the second manifold plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the hot nozzle assembly and the hot runner system with the same provided by the present invention improve the utilization rate of the hot nozzle per unit installation area through the installation relationship between the hot nozzle, the first diverter plate and the nozzle tip. The first diverter plate plays the role of fixing the nozzle tip. At the same time, the outer peripheral wall of the other part of the nozzle tip is matched with the circumferential clearance of the outer wall of the first diverter plate. When the nozzle tip expands, the nozzle tip can adaptively make appropriate adjustments in its peripheral direction to avoid the occurrence of glue leakage at the glue sealing part of the mold gate. It has the advantages of compact structure, easy installation, stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the hot runner system of the present invention;

[0018] Figure 2 Schematic diagram of the exploded structure of the hot nozzle assembly of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the hot nozzle assembly of the present invention when viewed from above;

[0020] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0021] Figure 5 This is a schematic structural diagram of the hot nozzle assembly of the present invention in the main viewing direction;

[0022] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure in the BB direction;

[0023] Figure 7 This is a schematic structural diagram of the hot nozzle assembly of the present invention installed at the bottom of the hot nozzle in the main view direction;

[0024] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure in the CC direction.

[0025] Figure: 1, injection nozzle; 11, glue inlet; 2, second manifold; 21, second accommodating groove; 22, second heating pipe; 3, hot nozzle assembly; 4, hot nozzle; 5, first manifold; 51, mounting base; 511, mounting base body; 512, separator; 52, manifold body; 521, upper manifold body; 522, lower manifold body; 53, fastener; 54, through hole; 55, first accommodating groove; 56, mounting cavity; 57, limit Position space; 6, nozzle tip; 61, limiting boss portion; 611, first inclined wall; 612, second wall; 613, third wall; 62, cylindrical portion; 63, nozzle tip; 64, glue outlet hole; 641, glue outlet; 65, docking pad; 66, glue maintenance cap; 7, hot runner; 71, first runner; 72, branch runner; 721, branch docking port; 73, second runner; 8, first heating tube; 81, first arc segment; 82, second arc segment. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0027] The terms "including" and "having" and any variations thereof in the present invention are intended to cover non-exclusive inclusions. Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] Combine Figure 1 and Figure 2 As shown, this embodiment involves a hot runner system comprising an injection nozzle 1 extending along a longitudinal axis, a second manifold plate 2 perpendicularly disposed at the bottom of the injection nozzle 1, and a set of hot nozzle assemblies 3 symmetrically disposed at the bottom of the second manifold plate 2 with respect to the injection nozzle 1. The injection nozzle 1 has a glue inlet 11, and the hot nozzle assembly 3 has a glue outlet 641. By heating and temperature-controlling the injection material, the molten plastic is poured into the mold cavity through the hot runner system, preventing the formation of agglomerates in the pouring system.

[0029] Furthermore, the hot runner system also includes a second heating tube 22 disposed on the second manifold 2. The shape of the second heating tube 22 is configured to match the contour of the second manifold 2. The top and bottom of the second manifold 2 are respectively provided with second receiving grooves 21 for accommodating the second heating tube 22. This ensures that the molten plastic can maintain a certain temperature during the conveying process and can flow smoothly downward.

[0030] Furthermore, the width of the second accommodating groove 21 is greater than the diameter of the second heating tube 22 , and the height of the second accommodating groove 21 is higher than the diameter of the second heating tube 22 , so that the heating effect is better and the contact area is larger.

[0031] In this embodiment, a hot nozzle assembly 3 is provided, comprising a hot nozzle 4 extending along a longitudinal axis, a first diverter plate 5, and a nozzle tip 6 having a glue outlet 641. The first diverter plate 5 is fixed to the bottom of the hot nozzle 4 along the axial direction of the hot nozzle 4, that is, the first diverter plate 5 is vertically arranged at the bottom of the hot nozzle 4.

[0032] A portion of the nozzle tip 6 is fixed within the first manifold plate 5, while the other portion of the nozzle tip 6 penetrates the outer wall of the first manifold plate 5 and extends outward. Therefore, the nozzle tip 6 is perpendicularly connected to the outer wall of the first manifold plate 5. A through hole 54 is provided on the outer wall of the first manifold plate 5 for the other portion of the nozzle tip 6 to pass through. A circumferential clearance is formed between the outer peripheral wall of the other portion of the nozzle tip 6 and the through hole 54 on the outer wall of the first manifold plate 5.

[0033] Combine Figures 3 to 6 As shown, in this embodiment, the hot nozzle 4, the first diverter plate 5 and the nozzle tip 6 together form a penetrating hot runner 7, and the molten plastic passes through the hot runner 7 and flows into the mold cavity via the glue outlet 641.

[0034] Preferably, the first diverter plate 5 includes a mounting seat 51 , a diverter plate body 52 disposed in the mounting seat 51 , and a fastener 53 for fixing the mounting seat 51 and the diverter plate body 52 together.

[0035] Furthermore, the mounting base 51 has a bottom-open mounting cavity 56 for mounting the manifold body 52. ​​The manifold body 52 is received within the mounting cavity 56 through the opening of the mounting cavity 56. Fasteners 53 secure the manifold body 52 and the mounting base 51 together to form a single unit. In this embodiment, the fasteners 53 are set screws that extend through both the manifold body 52 and the mounting base 51. This provides the advantages of easy installation and implementation. The bottom of the hot nozzle 4 extends longitudinally through the mounting base 51 to connect with the top of the manifold body 52.

[0036] The diverter plate body 52 includes an upper diverter plate body 521 and a lower diverter plate body 522 that are disposed opposite to each other.

[0037] Preferably, the hot nozzle assembly 3 further includes a docking pad 65 connecting the hot nozzle 4 and the first manifold 5. The bottom of the hot nozzle 4 is connected to the top of the manifold body 52 via the docking pad 65. The hot nozzle 4, the docking pad 65, and the first manifold 5 collectively form a hot runner 7. A portion of the docking pad 65 is positioned on top of the mounting seat 51, while another portion extends into the mounting seat 51 and connects to the top of the manifold body 52. ​​This provides the advantage of enhanced connection strength and improved overall structural stability.

[0038] Combine Figure 7 and Figure 8 As shown, a portion of the nozzle tip 6 forms a limiting boss portion 61, and another portion of the nozzle tip 6 forms a cylindrical portion 62 passing through the mounting seat 51 and a nozzle tip portion 63 extending out of the mounting seat 51, and a limiting space 57 for limiting and fixing the limiting boss portion 61 is formed between the mounting seat 51 and the diverter plate body 52.

[0039] Furthermore, the cross-section of the end of the limiting boss portion 61 is larger than the cross-section of the end of the cylindrical portion 62, and the cross-section of the end of the cylindrical portion 62 is larger than the cross-section of the end of the nozzle tip portion 63, so that the limiting boss portion 61 is fixed in the limiting space 57, thereby achieving the effect of fixing the nozzle tip 6. This has the advantage of a simple fixing method, wherein the end of the nozzle tip portion 63 is provided with a glue outlet 641.

[0040] Preferably, the limiting boss portion 61 includes a first slanted wall 611 that abuts the outer wall of the diverter plate body 52, a second wall 612 that abuts the inner wall of the mounting seat 51 and is disposed opposite the first slanted wall 611, and a third wall 613 that connects the first slanted wall 611 and the second wall 612 and is limited by the inner top wall of the mounting seat 51. The angle between the first slanted wall 611 and the third wall 613 is set to an acute angle. The outer wall of the diverter plate body 52, the inner wall of the mounting seat 51, and the inner top wall of the mounting seat 51 collectively form the limiting space 57.

[0041] Preferably, the outer wall of the manifold body 52 is inclined, and the distance between the outer wall of the manifold body 52 and the inner wall of the mounting seat 51 decreases from top to bottom. A through hole 54 is provided on the outer wall of the mounting seat 51. During installation, the nozzle tip 6 is first passed through the through hole 54 to form a single unit with the mounting seat 51. The resulting unit is then passed through the opening of the mounting cavity 56 so that the manifold body 52 is accommodated within the mounting cavity 56. During installation, the outer wall of the manifold body 52 and the inner wall of the mounting seat 51 gradually stabilize the limiting boss 61, facilitating ease of operation and a smooth installation process.

[0042] Preferably, the mounting seat 51 and the diverter plate body 52 are both configured as rectangular parallelepipeds, wherein a plurality of nozzle tips 6 are spaced apart along the length direction of the mounting seat 51, and the nozzle tips 6 are symmetrically connected to the first diverter plate 5, and the mounting seat 51 includes a mounting seat body 511, and a dividing block 512 formed by extending the inner side wall of the mounting seat body 511 toward the diverter plate body 52 and used to separate adjacent nozzle tips 6.

[0043] Among them, since the mounting seat 51 and the diverter plate body 52 are both designed as rectangular parallelepipeds, it is convenient for core pulling of the slider side of the mold, solving the technical problem that there is no space to install the slider in conventional molds, and has the advantages of compact structure and easy processing.

[0044] Preferably, the hot runner 7 includes, in sequence, a first flow channel 71 formed by the hot nozzle 4 and running from top to bottom, a diverter channel 72 formed by the first diverter plate 5 and connected to the first flow channel 71 and having a diverter docking port 721, and a second flow channel 73 formed by the nozzle tip 6 and docked with the diverter docking port 721, wherein the diverter channel 72 has multiple diverter docking ports 721, and each diverter docking port 721 is docked with a nozzle tip 6.

[0045] Preferably, the diverter channel 72 is arranged in a horizontal direction, and the diverter channel 72 is formed by the upper diverter plate body 521 and the lower diverter plate body 522 .

[0046] Preferably, the diversion port 721 is coaxially arranged with the second flow channel 73, and the aperture of the diversion port 721 is smaller than or equal to the aperture of the plastic inlet end of the second flow channel 73. This ensures that the molten plastic can flow into the nozzle tip 6 as completely as possible, solving the problem of easy leakage.

[0047] Furthermore, the hot nozzle assembly 3 also includes a first heating tube 8 disposed on the outer wall of the mounting base 51. The outer wall of the mounting base 51 is provided with a first accommodating groove 55 for accommodating the first heating tube 8. The shape of the first heating tube 8 matches the distribution of the nozzle tip 6. The first heating tube 8 includes a first U-shaped arc segment 81 disposed in the lower half of the outer periphery of the nozzle tip 6 and a second arc segment 82 connecting the adjacent first arc segments 81. This further ensures that the molten plastic can maintain a certain temperature during the conveying process and flow smoothly downward.

[0048] Preferably, the nozzle tip 6 has a plurality of glue outlet holes 64 connected to the second flow channel 73, wherein the number of the glue outlet holes 64 is set to 3-6, and a glue outlet 641 is set at the end of the glue outlet hole 64 to ensure that the molten plastic can flow smoothly into the mold cavity.

[0049] Furthermore, the glue outlet holes 64 are distributed at intervals along the circumference of the nozzle tip 6 , and the hot nozzle assembly 3 also includes a glue-maintaining cap wrapped around the outer circumference of the nozzle tip 6 and covering the glue outlet holes 64 .

[0050] Compared with the prior art, the hot nozzle assembly 3 and the hot runner system having the same provided by the present invention improve the utilization rate of the hot nozzle 4 per unit installation area through the installation relationship between the hot nozzle 4, the first diverter plate 5 and the nozzle tip 6. The first diverter plate 5 plays the role of fixing the nozzle tip 6. At the same time, the outer peripheral wall of the other part of the nozzle tip 6 is matched with the circumferential clearance of the outer wall of the first diverter plate 5. When the nozzle tip 6 expands, the nozzle tip 6 can adaptively make appropriate adjustments in its peripheral direction to avoid the occurrence of glue leakage at the glue sealing part of the mold gate. It has the advantages of compact structure, easy installation, stability and reliability.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A hot nozzle assembly, characterized in that: include: Hot Mouth; a first diverter plate, the first diverter plate being fixed to the bottom of the hot nozzle along the axial direction of the hot nozzle; as well as A nozzle tip, wherein a portion of the nozzle tip is fixed in the first diverter plate, and another portion of the nozzle tip penetrates the outer wall of the first diverter plate and extends outward, and an outer peripheral wall of the other portion of the nozzle tip is in circumferential clearance with the outer wall of the first diverter plate; The hot nozzle, the first diverter plate and the nozzle tip together form a penetrating hot runner; The first manifold includes a mounting seat, a manifold body disposed in the mounting seat, and a fastener for fixing the mounting seat and the manifold body together, wherein the mounting seat has a mounting cavity with an open bottom for mounting the manifold body, and the bottom of the hot nozzle longitudinally passes through the mounting seat to be connected to the top of the manifold body; A portion of the nozzle tip forms a limiting boss portion, and another portion of the nozzle tip forms a cylindrical portion penetrating the mounting seat and a nozzle tip portion extending from the mounting seat, and a limiting space is formed between the mounting seat and the diverter plate body for limiting and fixing the limiting boss portion; The limiting boss portion includes a first oblique wall abutting against the outer side wall of the diverter plate body, a second wall abutting against the inner side wall of the mounting seat and arranged opposite to the first oblique wall, and a third wall connecting the first oblique wall and the second wall and limitingly cooperating with the inner top wall of the mounting seat, wherein the outer side wall of the diverter plate body, the inner side wall of the mounting seat, and the inner top wall of the mounting seat jointly form the limiting space; The mounting seat and the diverter plate body are both configured as rectangular parallelepipeds, wherein a plurality of the nozzle tips are spaced apart along the length direction of the mounting seat, and the mounting seat includes a mounting seat body, and a partition block formed by extending the inner side wall of the mounting seat body toward the diverter plate body and used to separate adjacent nozzle tips.

2. The hot nozzle assembly according to claim 1, characterized in that: The outer side wall of the diverter plate body is arranged to be inclined, and the distance between the outer side wall of the diverter plate body and the inner side wall of the mounting seat decreases from top to bottom.

3. The hot nozzle assembly according to claim 1, characterized in that: The hot runner includes, in sequence, a first runner formed by the hot nozzle and running from top to bottom, a diverter runner formed by the first diverter plate and connected to the first runner and having a diverter docking port, and a second runner formed by the nozzle tip and docked with the diverter docking port, wherein the diverter runner has multiple diverter docking ports, each of which docks with one nozzle tip.

4. The hot nozzle assembly according to claim 3, characterized in that: The diversion interface is coaxially arranged with the second flow channel, and the aperture of the diversion interface is smaller than the aperture of the glue inlet end of the second flow channel.

5. The hot nozzle assembly according to claim 3, characterized in that: The nozzle tip has a plurality of glue outlet holes connected to the second flow channel, wherein the glue outlet holes are distributed at intervals along the circumference of the nozzle tip, and the hot nozzle assembly also includes a glue cap wrapped around the outer periphery of the nozzle tip and wrapping the glue outlet holes.

6. A hot runner system comprising an injection nozzle and a second manifold disposed at the bottom of the injection nozzle, characterized in that: It also includes a hot nozzle assembly according to any one of claims 1 to 5, wherein the hot nozzle is arranged at the bottom of the second diverter plate.

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