Physical micro-foaming injection molding screw assembly

Abstract

The utility model discloses a physical micro-foaming injection molding screw rod assembly, which comprises a screw rod, the screw rod comprises a screw rod head, a screw rod tail and a screw rod body, the screw rod body is of a cylindrical structure, and helical teeth are coiled on the outer part of the screw rod body around the circumference of the screw rod body; the screw rod tail part is assembled at the rear end of the screw rod body; according to the physical micro-foaming injection molding screw assembly, a foaming injection molding screw fixing structure with the brand of YOUKIN and the model of YX-65 in the existing market is improved, an assembling structure is adopted, the whole body is convenient to assemble, maintain and replace, different screw tails and screw heads are convenient to replace according to the installation requirements of different injection molding machines, the installation and use are flexible, and the cost is low. And the use and installation efficiency of physical micro-foaming is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding screw manufacturing, and particularly relates to a physical micro-foaming injection molding screw assembly. Background Art

[0002] The physical micro-foaming injection molding screw assemblies currently sold on the market, such as the brand YOUKIN, model YX-65, have a fixed overall structure, which is not convenient for assembly, maintenance and replacement. It is not convenient to replace different screw tails and screw heads according to the installation needs of different injection molding machines, and the installation and use are relatively simple. Utility Model Content

[0003] The purpose of the utility model is to provide a physical micro-foaming injection molding screw assembly to solve the problems raised in the above background technology.

[0004] The utility model provides the following technical solution: a physical micro-foam injection molding screw assembly, comprising a screw, wherein the screw comprises a screw head, a screw tail, and a screw body, the screw body being a cylindrical structure, with spiral teeth spiraling around the circumference of the screw body; the characteristics are: the screw head comprises a screw head and a screw head portion, a stud is provided at the rear end of the screw head, an internal screw hole is embedded in the front end of the screw head portion, the screw head is screwed into the internal screw hole through the stud, a connecting stud is provided at the rear end of the screw head portion, a connecting internal screw hole is embedded in the front end of the screw body, and the screw head portion is screwed into the connecting internal screw hole through the connecting stud;

[0005] The tail end of the screw rod includes a connecting section and a connecting tail end. The front end of the connecting section is provided with a mounting stud, and the rear end is embedded with a mounting inner screw hole. The rear end of the screw rod body is embedded with a mounting inner screw hole, which is screwed with the mounting stud, and the mounting inner screw hole is screwed with the connecting tail end. The front end of the connecting tail end is provided with a connecting stud.

[0006] Preferably, a first connecting protrusion and a second connecting protrusion are provided at the rear end of the screw head, and a connecting stud is provided at the rear end of the second connecting protrusion.

[0007] Preferably, the cross-sectional diameter of the connecting protrusion 1 is larger than the cross-sectional diameter of the connecting protrusion 2 and smaller than the cross-sectional diameter of the screw head.

[0008] Preferably, the connecting section has a channel opening.

[0009] Preferably, convex strips are evenly distributed along the outer wall of the tail portion.

[0010] The beneficial effects of the utility model are as follows: the physical micro-foaming injection molding screw assembly of the present application improves the existing foaming injection molding screw fixing structure on the market, such as the brand YOUKIN and model YX-65, and adopts an assembly structure, which is easy to assemble, maintain and replace as a whole, and is convenient for replacing different screw tails and screw heads according to the installation needs of different injection molding machines. It is flexible to install and use, and improves the installation efficiency of physical micro-foaming. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model;

[0012] Figure 2 Schematic diagram of the screw head structure;

[0013] Figure 3 Schematic diagram of the tail end structure;

[0014] Figure 4 Schematic diagram of the connecting section structure;

[0015] Figure 5 Schematic diagram of the screw structure;

[0016] In the figure: screw 1, screw head 2, screw head tip 21, screw head 22, stud 23, inner screw hole 24, connecting stud 25, connecting inner screw hole 26, connecting protrusion 1 27, connecting protrusion 28, screw tail 3, connecting section 31, channel opening 32, connecting tail end 4, convex strip 41, mounting stud 42, mounting inner screw hole 43, screw body 5, spiral teeth 51. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-5 The technical solution provided by the utility model is: a physical micro-foaming injection molding screw assembly, including a screw 1, wherein the screw 1 includes a screw head 2, a screw tail 3 and a screw body 5, and the screw body 5 is a cylindrical structure, and spiral teeth 51 are spirally arranged around the circumference of the screw body 5; it is a prior art, and the screws on the current market all adopt this structure, so it will not be described in detail.

[0019] The physical micro-foam injection molding screw assembly currently sold on the market, such as the YOUKIN brand and model YX-65, has a fixed overall structure, making it difficult to assemble, maintain, and replace. It is also difficult to replace different screw tails and screw heads according to the installation requirements of different injection molding machines, resulting in a relatively simple installation and use. This application has made improvements by separately screwing the screw head and screw tail to the front and rear ends of the screw, and connecting the screw tails via a connecting section. This has a reasonable structure, is easy to maintain and assemble overall, and allows for easy replacement of different screw tails and screw heads according to the installation requirements of different injection molding machines, thereby increasing flexibility.

[0020] The specific structure of the present application is as follows: the screw head 2 includes a screw head tip 21 and a screw head 22. The rear end of the screw head tip 21 is provided with a stud 23, and the front end of the screw head 22 is embedded with an internal screw hole 24. The screw head tip 21 is screwed into the internal screw hole 24 via the stud 23, forming a structure in which the screw head tip 21 is screwed to the screw head 22, thereby completing the overall structure of the screw head 2. A connecting stud 25 is provided at the rear end of the screw head 22, and a connecting internal screw hole 26 is embedded at the front end of the screw body 5. The screw head 22 is screwed into the connecting internal screw hole 26 via the connecting stud 25, thereby forming a structure in which the screw head 2 is screwed to the screw body 5. The rear end of the screw head 22 is provided with a connecting protrusion 1 27 and a connecting protrusion 28, and the connecting stud 25 is located at the rear end of the connecting protrusion 28. The cross-sectional diameter of the connecting protrusion 1 27 is larger than that of the connecting protrusion 28 and smaller than the cross-sectional diameter of the screw head 22. The interior of the screw head 2 and the screw head 2 and the screw body 5 are convenient for assembly and maintenance, and it is also convenient to replace screw heads of different types with the same screw connection structure according to the installation and use needs of different injection molding machines.

[0021] The screw tail end 3 includes a connecting section 31 and a connecting end 4. The front end of the connecting section 31 is provided with a mounting stud 42, and the connecting section 31 is provided with a passage opening 32. The rear end of the connecting section 31 is embedded with an internal mounting screw hole 43, and the rear end of the screw body 5 is embedded with an internal mounting screw hole 24, which is screwed together with the mounting stud 42, making it convenient to screw the connecting section 31 onto the rear end of the screw body 5 to form an assembly structure, convenient for connecting the connecting end, and screwing the connecting end 4 with the mounting internal screw hole 43. Raised strips 41 are evenly arranged along the outer wall of the connecting end. A connecting stud 42 is provided at the front end of the connecting end 4. The connection section 31 and the screw body 5, and the connecting end 4 and the connecting section 31 are convenient for assembly and maintenance, and are also convenient for replacement according to the installation and use needs of different injection molding machines, and are flexible to use.

[0022] The working principle of this application is as follows: the screw head is assembled according to the use requirements, the screw head tip is screwed onto the screw head to form the screw head, and then the screw head is screwed onto the front end of the screw body. The connecting section is screwed onto the rear end of the screw body, and the tail end is screwed onto the rear end of the connecting section.

[0023] This application develops a screw assembly for physical micro-foaming based on PP and PE. It addresses the original low porosity of 20-30%, and the quality problems such as surface vortex flow marks, silver streaks, surface bubbles and blowouts, as well as defects such as poor resistance to flex cracking and difficulty in processing. In order to improve the strength-to-weight ratio, it is now required that the product reach a porosity of 50-60%, while the strength remains unchanged, and even the structural strength is enhanced, and the foaming rate needs to be greatly improved. After researching and analyzing the process characteristics of PP and PE with the addition of modifiers and other related auxiliary materials during the plasticization process, the project team sorted out, analyzed and summarized the existing problems. At the same time, in order to address the problems of air leakage, pressure maintenance, and prevention of material backflow during injection molding, corresponding implementation plans were made through solutions such as two-stage compression, secondary extrusion, and two-stage check, and the solution verification, sample trial production, and testing were carried out.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A physical micro-foam injection molding screw assembly, comprising a screw, wherein the screw comprises a screw head, a screw tail, and a screw body, wherein the screw body is a cylindrical structure, and spiral teeth are spirally arranged around the circumference of the screw body; characterized in that: The screw head includes a screw head and a screw head portion, a stud is provided at the rear end of the screw head, an internal screw hole is embedded in the front end of the screw head portion, the screw head is screwed into the internal screw hole through the stud, a connecting stud is provided at the rear end of the screw head portion, a connecting internal screw hole is embedded in the front end of the screw body, and the screw head portion is screwed into the connecting internal screw hole through the connecting stud; the screw tail end includes a connecting section and a connecting tail end, a mounting stud is provided at the front end of the connecting section, an mounting internal screw hole is embedded in the rear end, an mounting internal screw hole is embedded in the rear end of the screw body, which is screwed with the mounting stud, the mounting internal screw hole is screwed into the connecting tail end, and a connecting stud is provided at the front end of the connecting tail end.

2. The physical micro-foaming injection molding screw assembly according to claim 1, characterized in that: The rear end of the screw head is provided with a first connecting protrusion and a second connecting protrusion, and the connecting stud is provided at the rear end of the second connecting protrusion.

3. The physical micro-foaming injection molding screw assembly according to claim 2, characterized in that: The cross-sectional diameter of the connecting protrusion 1 is larger than the cross-sectional diameter of the connecting protrusion 2 and smaller than the cross-sectional diameter of the screw head.

4. The physical micro-foaming injection molding screw assembly according to claim 1, characterized in that: The connecting section is provided with a passage opening.

5. The physical micro-foaming injection molding screw assembly according to claim 1, characterized in that: Raised strips are evenly arranged along the outer wall of the tail portion.

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