An injection screw mold with adjustable thread

Abstract

The invention discloses an injection screw mold with adjustable threads, including a mold base, two screw injection cavities are provided on the mold base, fins are attached to the inner walls on both sides of the screw injection cavity, pull rods are also installed on both sides of the screw injection cavity, and the pull rods are located inside the mold base, the pull rods and the fins are connected by spring tubes, a cap is installed on the top of the pull rod, the cap is located in the top surface slide groove of the mold base, a latch is installed between the cap and the fins on the inner wall of the screw injection cavity, and the latch is located at the top of the mold base and directly above the spring tube, and the fins are provided with threads. The invention pulls the pull rod to drive the fins to tilt, so as to adjust the spacing between the threads on the two inner wall fins of the screw injection cavity, so as to adjust the size of the screw threads, and the latch is inserted into the angle between two adjacent spring tubes to limit and fix the fins, so as to fix the fins and facilitate the injection of the screws.

Description

Technical Field

[0001] The invention relates to a screw injection mould, in particular to an injection screw mould with adjustable threads. Background Art

[0002] Screws are widely used in daily life and work. Common screws are made of metal or plastic. During the injection molding process of plastic screws, the mold cavity is a fixed single structure and the screw thread width cannot be adjusted. Each different plastic screw needs to be made with a screw mold of different model and size. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an injection screw mold with adjustable threads. The present invention can drive the fins to tilt by pulling the pull rod, so as to adjust the spacing between the threads on the fins on the two inner walls of the screw injection cavity, thereby adjusting the size of the screw threads, and limit and fix the fins by inserting a pin into the angle between two adjacent spring tubes, thereby fixing the fins and facilitating the injection of the screws.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The present invention discloses an injection screw mold with adjustable threads, comprising a mold base, wherein two screw injection cavities are formed on the mold base, fins are fitted on both inner walls of the screw injection cavities, pull rods are further installed on both sides of the screw injection cavities, and the pull rods are located inside the mold base, the pull rods and the fins are connected by spring tubes, a cap is installed on the top of the pull rods, and the cap is located in a top surface slide groove of the mold base, a latch member is installed between the cap and the fins on the inner wall of the screw injection cavity, and the latch member is located at the top end of the mold base and directly above the spring tube, and threads are formed on the fins.

[0006] As a preferred technical solution of the present invention, the number of the spring tubes is five, and the five spring tubes are arranged parallel to each other.

[0007] As a preferred technical solution of the present invention, the fin is an arc-shaped structure and is attached to the inner walls on both sides of the screw injection cavity.

[0008] As a preferred technical solution of the present invention, the pull rod and the spring tube are both located in the cavity inside the mold base.

[0009] As a preferred technical solution of the present invention, the pull rod and the top surface sliding groove are slidably connected.

[0010] As a preferred technical solution of the present invention, the diameter of the latch member is equal to the distance between two adjacent spring tubes.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention can drive the fins to tilt by pulling the pull rod, so as to adjust the spacing between the threads on the fins on the two inner walls of the screw injection cavity, thereby adjusting the size of the screw threads, and limit and fix the fins by inserting the latch into the angle between two adjacent spring tubes, thereby fixing the fins and facilitating the injection of the screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is the overall structural diagram of the present invention;

[0015] Figure 2 It is a structural diagram of the connection between the tie rod and the fin of the present invention;

[0016] Figure 3 It is the structural diagram of the injection-molded screw of the present invention;

[0017] In the figure: 1. mold base; 2. screw injection cavity; 3. fin; 4. pull rod; 5. spring tube; 6. cover cap; 7. top surface slide groove; 8. latch; 9. thread. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. The same reference numerals in the accompanying drawings all refer to the same components.

[0019] In addition, if a detailed description of a known technology is not necessary for illustrating the features of the present invention, it will be omitted. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] Example 1

[0021] like Figure 1-3The present invention provides an injection screw mold with adjustable threads, including a mold base 1, wherein two screw injection cavities 2 are formed on the mold base 1, fins 3 are attached to the inner walls on both sides of the screw injection cavity 2, and pull rods 4 are installed on both sides of the screw injection cavity 2, and the pull rods 4 are located inside the mold base 1, the pull rods 4 and the fins 3 are connected by spring tubes 5, a cap 6 is installed on the top of the pull rod 4, the cap 6 is located in a top surface slide groove 7 of the mold base 1, a latch 8 is installed between the cap 6 and the fins 3 on the inner wall of the screw injection cavity 2, and the latch 8 is located at the top of the mold base 1 and directly above the spring tube 5, and a thread 9 is formed on the fin 3.

[0022] Furthermore, there are five spring tubes 5, and the five spring tubes 5 are arranged parallel to each other. By manually pulling the cap 6 on the pull rod 4, the pull rod 4 can slide in the top surface slide groove 7, and the spring tube 5 drives the fin 7 to move left and right inside the screw injection cavity 2, so that the fin 7 between the inner walls on both sides of the screw injection cavity 2 can adjust the spacing, thereby adjusting the spacing between the threads 9 on the fin 7.

[0023] The fin 3 is an arc-shaped structure, which fits on the inner walls on both sides of the screw injection cavity 2 to ensure the normal injection molding of the thread 9.

[0024] The pull rod 4 and the spring tube 5 are both located in the cavity inside the mold base 1 , so that the pull rod 4 and the spring tube 5 can move in the cavity inside the mold base 1 .

[0025] The pull rod 4 is slidably connected to the top surface slide groove 7, so that the cap 6 on the top of the pull rod 4 can be conveniently pulled manually to drive the pull rod 4 to slide in the top surface slide groove 7.

[0026] The diameter of the latch member 8 is equal to the distance between two adjacent spring tubes 5 , so that after the latch member 8 is inserted, the bottom end of the latch member 8 is inserted between the two spring tubes 5 to limit and fix the spring tubes 5 .

[0027] Specifically, when in use, firstly, the size of the screw is made according to the needs, and the cap 6 on the pull rod 4 is manually pulled to make the pull rod 4 slide in the top surface slide groove 7, and the spring tube 5 drives the fin 7 to move left and right inside the screw injection cavity 2, so that the fin 7 between the inner walls on both sides of the screw injection cavity 2 can adjust the spacing, so as to adjust the spacing between the threads 9 on the fin 7, pour the injection molding material into the screw injection cavity 2 for injection molding, merge two mold bases 1 with the same structure towards each other, and heat the whole to perform injection molding, such as Figure 3 shown.

[0028] The present invention can drive the fin 7 to tilt by pulling the pull rod 4, so as to adjust the spacing between the threads 9 on the two inner walls of the fin 7 of the screw injection cavity 2, thereby adjusting the size of the screw threads 9, and inserting the pin 8 into the angle between the two adjacent spring tubes 5 to limit and fix the fin 7, thereby fixing the fin 7 to facilitate the injection of the screw.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection screw mold with adjustable thread, comprising a mold base (1), characterized in that: The mold base (1) is provided with two screw injection cavities (2), and fins (3) are attached to the inner walls on both sides of the screw injection cavities (2). Pull rods (4) are also installed on both sides of the screw injection cavities (2), and the pull rods (4) are located inside the mold base (1). The pull rods (4) and the fins (3) are connected via spring tubes (5). A cover cap (6) is installed on the top of the pull rods (4), and the cover cap (6) is located in a top surface slide groove (7) of the mold base (1). A latch (8) is installed between the cover cap (6) and the fins (3) on the inner wall of the screw injection cavity (2), and the latch (8) is located at the top of the mold base (1) and directly above the spring tube (5). The fins (3) are provided with threads (9). The number of the spring tubes (5) is five, and the five spring tubes (5) are arranged parallel to each other; The fins (3) are arc-shaped structures and fit onto the inner walls on both sides of the screw injection molding cavity (2).

2. The injection screw mold with adjustable thread according to claim 1, characterized in that: The pull rod (4) and the spring tube (5) are both located in the cavity inside the mold base (1).

3. The injection screw mold with adjustable thread according to claim 1, characterized in that: The pull rod (4) and the top surface slide groove (7) are slidably connected.

4. The injection screw mold with adjustable thread according to claim 1, characterized in that: The diameter of the latch member (8) is equal to the distance between two adjacent spring tubes (5).

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