Anti-blocking injection molding nozzle

Abstract

The anti-blocking injection molding nozzle comprises a nozzle body and a filter element, a material spraying channel penetrating in the axial direction is arranged in the nozzle body, a front end opening of the material spraying channel is a material spraying opening, a rear end opening of the material spraying channel is a feeding opening, and the filter element is arranged in the material spraying channel; the filter element comprises a cone part and an annular part fixed to the large end of the cone part, a plurality of filter holes are formed in the surface of the cone part, the inner diameter of each filter hole is smaller than that of the material spraying opening, a backward blocking table is arranged on the inner wall of the material spraying channel, the filter element is arranged in the material spraying channel from the feeding opening, the annular part abuts against the blocking table, and the cone part protrudes backwards. The anti-blocking injection molding nozzle is reasonable in structural design, impurity particles in materials can be effectively filtered out, the filter element is convenient to disassemble and assemble, the mixing effect can be improved through the filter element, and the anti-blocking injection molding nozzle has good practicability and generalizability.

Description

Technical Field

[0001] The utility model relates to an injection molding machine accessory, in particular to an anti-blocking injection molding nozzle. Background Art

[0002] Injection molding machines use a plasticizing barrel to melt and plasticize the raw material, then extrude it into a mold at high speed. A nozzle is located at the front of the barrel to eject the material. Recycled materials often contain solid impurity particles (such as iron filings and sand). If these impurities are not filtered out, they can easily clog the nozzle's discharge port. Furthermore, impurities can enter the mold cavity, affecting the production quality of the plastic product and causing waste. Existing nozzle filters are mostly disc-shaped, with a small filtration area. Filtered impurity particles can easily clog the filter pores, causing further clogging. Utility Model Content

[0003] In this regard, the utility model aims to provide an anti-blocking injection molding nozzle with reasonable structural design, convenient filter element installation, good filtering effect, and mixing effect.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an anti-clogging injection molding nozzle, comprising a nozzle body and a filter element, wherein the nozzle body is provided with a spray channel running through in the axial direction, the front end of the spray channel is the spray port, the rear end of the spray channel is the feed port, and the filter element is installed in the spray channel; the filter element comprises a cone portion and an annular portion fixed to the large end of the cone portion, a plurality of filter holes are arranged on the surface of the cone portion, and the inner diameters of all the filter holes are smaller than the inner diameter of the spray port, a rearward baffle is provided on the inner wall of the spray channel, and the filter element is installed in the spray channel from the feed port so that the annular portion abuts against the baffle, and the cone portion protrudes rearward.

[0006] In some embodiments, the baffle is an annular baffle.

[0007] In some embodiments, a tapered channel with a diameter gradually decreasing from back to front is formed in the spray channel between the baffle and the spray port, and an arc-shaped transition connection is formed between the tapered channel and the spray port.

[0008] In some embodiments, the outer diameter of the annular portion is larger than the outer diameter of the large end of the conical portion, and an annular step surface is formed on the outer wall of the filter element at the junction of the conical portion and the annular portion.

[0009] In some embodiments, the inner circumferential surface of the spray channel between the baffle and the feed port is a cylindrical surface, and the diameter of the cylindrical surface matches the diameter of the annular portion, and the axial length of the cylindrical surface is greater than the axial length of the filter element.

[0010] In some embodiments, the annular portion and the conical portion are an integrally formed structure, and the inner side of the large end of the conical portion and the inner side of the annular portion are transitioned into an arc-shaped surface.

[0011] In some embodiments, the outer wall of the nozzle body includes a cone portion, a hexagonal portion, and an external threaded portion sequentially arranged from front to back.

[0012] In some embodiments, an embedding groove is provided on the outer wall of the annular portion, and a magnet is embedded in the embedding groove.

[0013] The positive effects of the present invention are as follows: the anti-clogging nozzle structure of the present invention is optimized in design, and by arranging a cone portion and filter holes thereon, it is beneficial to increase the filtering area, which can better filter out impurity particles in the material, and the filtered impurity particles are pushed by the material and concentrated on the annular portion, thereby avoiding the filter holes being blocked and closed by impurity particles and causing clogging problems. At the same time, since the inner diameter of the filter holes is smaller than the inner diameter of the spray port, even if there are impurity particles in the material passing through the filter holes, the spray port will not be blocked, thereby achieving an anti-clogging effect; and the cone portion can also form a diversion effect on the material, thereby enhancing the mixing effect of the material, and further facilitating the improvement of the injection molding production quality; during installation, the filter element can be directly loaded into the spray channel from the feed port so that the annular portion and the baffle are offset. The filter element is easy to install, can improve assembly efficiency, and has good practicality and popularization applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the injection nozzle in the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0017] Figure 3 It is a left view of the injection nozzle in the utility model.

[0018] Reference numerals shown in the figure: 1-nozzle body; 11-spray port; 12-feed port; 13-blocking platform; 14-conical channel; 15-cylindrical surface; 2-filter element; 21-conical portion; 22-annular portion; 23-filter hole; 24-annular step surface; 25-conical portion; 26-hexagonal portion; 27-external threaded portion; 3-magnet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0022] The anti-blocking injection nozzle structure provided in the embodiment of the utility model is as follows Figures 1 to 3As shown, it includes a nozzle body 1 and a filter element 2, the nozzle body 1 has a spray channel that runs through in the axial direction, the front end of the spray channel is the spray port 11, and the rear end of the spray channel is the feed port 12, the filter element 2 is installed in the spray channel, and the impurity particles mixed in the material can be filtered through the filter element 2; specifically, the filter element 2 includes a cone portion 21 and an annular portion 22 fixed to the large end of the cone portion 21, a plurality of filter holes 23 are arranged on the surface of the cone portion 21, and the inner diameters of all the filter holes 23 are smaller than the inner diameter of the spray port 11, a rearward baffle 13 is provided on the inner wall of the spray channel, the filter element 2 is installed in the spray channel from the feed port 12, so that the annular portion 22 is against the baffle 13, and the cone portion 21 protrudes backward. In this embodiment, by providing a cone portion 21 and a filter hole 23 thereon, it is beneficial to increase the filtration area, which can better filter out foreign particles in the material. The filtered foreign particles are pushed by the material and concentrated on the annular portion 22, thereby avoiding the filter hole 23 being blocked by foreign particles and causing clogging. At the same time, since the inner diameter of the filter hole 23 is smaller than the inner diameter of the injection port 11, even if there are foreign particles in the material passing through the filter hole 23, the injection port 11 will not be blocked, thereby achieving an anti-clogging effect; and the cone portion 21 can also form a diversion effect on the material, thereby improving the mixing effect of the material, and then helping to improve the quality of injection molding production; during installation, the filter element 2 is directly loaded into the injection channel from the feed port 12 so that the annular portion 22 and the baffle 13 are offset. The filter element 2 is easy to install and can improve assembly efficiency.

[0023] In order to effectively block and limit the annular portion 22 of the filter element 2, it is preferred that the stop 13 is an annular stop.

[0024] like Figure 1 As shown, a conical channel 14 with a diameter gradually decreasing from back to front is formed in the spray channel between the baffle 13 and the spray port 11, and the conical channel 14 and the spray port 11 are connected by an arc-shaped transition. Such a setting can facilitate the smooth transportation of materials in the conical channel 14 and reduce internal dead angles, thereby making it more convenient to clean the residual materials in the nozzle.

[0025] like Figure 1 and Figure 2 As shown, the outer diameter of the annular portion 22 is larger than the outer diameter of the large end of the conical portion 21, and an annular step surface 24 is formed on the outer wall of the filter element 2 at the junction of the conical portion 21 and the annular portion 22. In this way, when the filter element 2 is installed in place in the injection channel, a relatively large space can be formed behind the annular portion 22, which is conducive to accommodating more filtered impurity particles here.

[0026] like Figure 1As shown, the inner circumferential surface of the spray channel between the baffle 13 and the feed port 12 is a cylindrical surface 15, and the diameter of the cylindrical surface 15 matches the diameter of the annular portion 22. With this arrangement, the filter element 2 can be stably installed in the spray channel, and when the filter element 2 is taken out of the spray channel, the impurity particles blocked by the annular portion 22 can also be taken out, reducing the difficulty of cleaning. The axial length of the cylindrical surface 15 is further arranged to be greater than the axial length of the filter element 2, so that the filter element 2 will not protrude from the feed port 12 after being installed in place, thereby not restricting the rear end structure setting of the nozzle.

[0027] The annular portion 22 and the conical portion 21 are integrally formed, and the filter element 2 can be made of stainless steel; the inner side of the large end of the conical portion 21 and the inner side of the annular portion 22 are in an arc-shaped transition, and the conical portion 21 and the annular portion 22 have good support and are not easily squeezed and deformed.

[0028] The outer wall of the nozzle body 1 is provided with a cone 25, a hexagonal body 26 and an external threaded portion 27 in sequence from front to back. When the nozzle is installed on the plastic injection molding cylinder, the external threaded portion 27 is screwed with the internal thread on the plastic injection molding cylinder, and the hexagonal body 26 is clamped with a wrench to screw the nozzle, which is convenient for installation; the injection port 11 is provided at the center of the cone 25, and the front end of the cone 25 is an arc-shaped convex surface.

[0029] In some embodiments, a groove is provided on the outer wall of the annular portion 22, and a magnet (not shown in the figure) is embedded in the groove. The magnet can be limited by the groove to reliably fix the magnet. The magnet can absorb iron filings in the material to prevent the iron filings from entering the plastic product and affecting the product quality.

[0030] In actual operation, in order to ensure that the filter element 2 is stably fixed in the injection channel, an outward-convex elastic latch can be stamped on the annular portion 22, and multiple elastic latches are evenly distributed along the circumference. The elastic latches elastically contact the inner wall of the injection channel to effectively position the filter element 2.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A blockage-proof injection molding nozzle, comprising a nozzle body (1) and a filter element (2), wherein the nozzle body (1) has a spray channel extending in the axial direction, the front end of the spray channel is a spray port (11), the rear end of the spray channel is a feed port (12), and the filter element (2) is installed in the spray channel; characterized in that, The filter element (2) comprises a cone portion (21) and an annular portion (22) fixed to the large end of the cone portion (21); a plurality of filter holes (23) are arranged on the surface of the cone portion (21); and the inner diameters of all the filter holes (23) are smaller than the inner diameter of the injection port (11); a rearward baffle (13) is provided on the inner wall of the injection channel; the filter element (2) is loaded into the injection channel through the feed port (12) so that the annular portion (22) abuts against the baffle (13), and the cone portion (21) protrudes rearward.

2. The anti-blocking injection molding nozzle according to claim 1, characterized in that: The baffle (13) is an annular baffle.

3. The anti-blocking injection molding nozzle according to claim 2, characterized in that: A tapered channel (14) with a diameter gradually decreasing from back to front is formed in the spray channel between the baffle (13) and the spray port (11), and an arc-shaped transition connection is formed between the tapered channel (14) and the spray port (11).

4. The anti-blocking injection molding nozzle according to claim 2, characterized in that: The outer diameter of the annular portion (22) is larger than the outer diameter of the large end of the conical portion (21), and an annular step surface (24) is formed on the outer wall of the filter element (2) at the junction of the conical portion (21) and the annular portion (22).

5. The anti-blocking injection molding nozzle according to claim 2, characterized in that: The inner circumferential surface of the spray channel between the baffle (13) and the feed port (12) is a cylindrical surface (15), and the diameter of the cylindrical surface (15) matches the diameter of the annular portion (22), and the axial length of the cylindrical surface (15) is greater than the axial length of the filter element (2).

6. The anti-clogging injection molding nozzle according to claim 1, characterized in that: The annular portion (22) and the cone portion (21) are an integrally formed structure, and the inner side of the large end of the cone portion (21) and the inner side of the annular portion (22) are in an arc-shaped transition.

7. The anti-clogging injection molding nozzle according to claim 1, characterized in that: The outer wall of the nozzle body (1) is provided with a cone portion (25), a hexagonal portion (26) and an external thread portion (27) in sequence from front to back.

8. The anti-clogging injection molding nozzle according to claim 1, characterized in that: An embedding groove is provided on the outer wall of the annular portion (22), and a magnet is embedded in the embedding groove.

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