Forming structure of anti-rotation plastic pipe nut mold
By designing complex mold structures and cooling water circuits, the loosening and sliding problems of plastic pipe fittings nuts during use are solved, efficient and rapid forming and cooling are achieved, and production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421886628.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-06
AI Technical Summary
Traditional plastic pipe fitting nuts are easily loosened due to thermal expansion and contraction during use, and the outer wall is smooth and not easy to hold and tighten. It is necessary to add anti-rotation and anti-slip structures, but the existing mold design is not enough to meet these needs.
A mold structure is designed, including a cavity composite plate, a core composite plate, a cavity insert, an anti-slip cavity surface, a core insert, an anti-rotation bump and a threaded groove core rod. By forming a mold cavity with the insertion and assembly, the integrated molding and rapid cooling of the nut is achieved.
It realizes efficient integrated molding of plastic pipe fittings and nuts, improves production efficiency, shortens production cycle, and accelerates the molding process through cooling water channels to ensure product quality.
Smart Images
Figure CN222959076U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a forming structure for preventing the rotation of plastic pipe fitting nuts, belonging to the field of injection molds. Background Art
[0002] Plastic products, such as plastic pipe fitting nuts, are produced by using injection molds for connecting and fixing two pipes. According to the analysis of the product structure and shape, the traditional pipe fitting nut has a simple structure. When designing and processing the mold, its forming structure is also relatively simple, and usually only the demolding of its thread needs to be considered. However, in actual use, on the one hand, when the nut is subjected to external forces (such as thermal expansion and contraction), it will deform, resulting in the rotation (loosening) of the nut, and a rotation prevention structure needs to be added to the nut; on the other hand, the outer wall of the nut is smooth, which is not conducive to hand tightening, and anti-slip ribs also need to be provided on the outer wall of the nut. Therefore, we need to design a mold forming structure that can be used to process a nut with a rotation prevention structure and anti-slip ribs. Summary of the Invention
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a mold forming structure for processing plastic pipe fitting nuts that prevent rotation.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A forming structure for a plastic pipe fitting nut mold that prevents rotation, comprising a cavity compound plate and a core compound plate. A cavity plate is arranged under the cavity compound plate, a cavity insert is arranged in the cavity plate, an anti-slip rib cavity surface is arranged on the cavity insert, a cavity core block is connected under the cavity compound plate, and the cavity core block is inserted into the anti-slip rib cavity surface. A mold base plate is arranged on the core compound plate, a core base plate is arranged on the mold base plate, a core plate is arranged on the core base plate, a core insert is arranged in the core plate, the core insert cooperates with the cavity insert, an anti-rotation convex block is arranged on the core insert, a core rod with a threaded groove at the upper end is arranged on the core base plate, the core rod with the threaded groove passes through the core plate and the core insert, is inserted and cooperated with the cavity core block, and forms a mold cavity with the anti-slip rib cavity surface, the core insert and the anti-rotation convex block. A sprue bushing is also arranged on the cavity compound plate, a gate is connected under the sprue bushing, and the gate communicates with the mold cavity. The mold cavity is used for filling injection molding materials.
[0006] Further, cooling water channels are arranged in the cavity insert and the core insert.
[0007] Further, cooling water holes are arranged in the cavity core block and the core rod.
[0008] The forming structure of the plastic pipe fitting nut mold that prevents rotation of the utility model has the following beneficial effects:
[0009] The core rod and the cavity core block are assembled by inserting into each other, forming a mold cavity with the anti-slip rib cavity surface, the core insert and the anti-rotation convex block, enabling the integral injection molding of the pipe fitting nut, with high production efficiency and cost savings;
[0010] The injection molding material directly enters the mold through the sprue bushing and the gate, without the need for hot runner splitting, enabling the injection molding material to quickly enter the mold cavity for filling and molding, which can shorten the production cycle of a product and improve production efficiency. Brief Description of the Drawings
[0011] Figure 1 It is a schematic diagram of the molding structure of a mold for preventing the rotation of a plastic pipe fitting nut of the present utility model;
[0012] Figure 2 It is a schematic diagram of the cavity insert of the present utility model;
[0013] Figure 3 It is a schematic diagram of the core insert of the present utility model;
[0014] Figure 4 It is a schematic diagram of the pipe fitting nut of the present utility model. Detailed Description of the Preferred Embodiments
[0015] The present utility model will be further described in detail below with reference to the accompanying drawings of the specification and specific embodiments.
[0016] Such as Figure 1 — Figure 4As shown in the figure, a forming structure for preventing the rotation of plastic pipe fitting nuts includes a cavity template 1 and a core template 2. A cavity plate 3 is arranged below the cavity template, a cavity insert 5 is arranged in the cavity plate, an anti-slip rib cavity surface 6 is arranged on the cavity insert, a cavity core block 12 is connected below the cavity template 1, and the cavity core block 12 is inserted into the anti-slip rib cavity surface 6. A mold base plate 7 is arranged on the core template, a core base plate 8 is arranged on the mold base plate, a core plate 9 is arranged on the core base plate, a core insert 10 is arranged in the core plate, the core insert 10 cooperates with the cavity insert 5, a rotation-preventing protrusion 11 is arranged on the core insert 10, a core rod 13 with a threaded groove 15 at the upper end is arranged on the core base plate 8, the core rod 13 with the threaded groove 15 passes through the core plate and the core insert, is inserted and cooperated with the cavity core block 12, and forms a mold cavity 16 with the anti-slip rib cavity surface 6, the core insert 10 and the rotation-preventing protrusion 11. A sprue bushing 17 is also arranged on the cavity template, a gate 18 is connected below the sprue bushing, the gate 18 communicates with the mold cavity 16, and the mold cavity 16 is used for filling injection molding materials. During production, the molten injection molding materials enter the mold cavity 16 through the sprue bushing 17 and the gate 18, and through pressure holding, cooling and shaping, a pipe fitting nut 23 with anti-slip ribs 24 on the outer wall, threads 21 on the inner wall and a rotation-preventing groove 22 on the lower end face is obtained. In actual production, after the pipe fitting nut 23 is formed, the mold needs to be opened to eject it from the forming structure. According to the actual situation, the anti-slip ribs 24 and the rotation-preventing groove 22 can be directly ejected, but for the threads 21 to be ejected, a rotary demolding mechanism is required. The thread rotary demolding mechanism of the pipe fitting nut mold in this solution is the same as the thread demolding structure of traditional pipe fitting nuts, mainly including components such as an oil motor, a gear, a bearing and a bearing fixing plate, which belong to existing technologies or conventional technologies and will not be elaborated here. The beneficial effects of this solution are as follows: First, the core rod 13 and the cavity core block 12 are assembled by inserting, and form a mold cavity 16 with the anti-slip rib cavity surface 6, the core insert 10 and the rotation-preventing protrusion 11, enabling the integrated injection molding of the pipe fitting nut, with high production efficiency and cost savings; Second, the injection molding materials directly enter the mold through the sprue bushing and the gate, without the need for hot runner splitting, enabling the injection molding materials to quickly enter the mold cavity for filling and shaping, which can shorten the production cycle of a product and improve production efficiency.
[0017] Further, cooling water channels 19 are provided in the cavity insert 5 and the core insert 10.
[0018] Further, cooling water holes 20 are provided in the cavity core block 12 and the core rod 13. There is cooling water in the cooling water channels and the cooling water holes, which can accelerate the cooling of the pipe fitting nut, shorten the shaping time, and at the same time cool each forming component of the mold to prevent the temperature of the forming components from being too high and affecting the product quality.
[0019] The above specific embodiments are used to explain the present utility model, and are only the preferred embodiments of the present utility model, rather than limiting the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the claims of the present utility model fall within the protection scope of the present utility model.
Claims
1. A molding structure for preventing the rotation of a plastic pipe nut mold, characterized in that The invention comprises a cavity composite plate (1) and a core composite plate (2), wherein a cavity plate (3) is arranged under the cavity composite plate, a cavity insert (5) is arranged in the cavity plate, an anti-skid rib cavity surface (6) is arranged on the cavity insert, a cavity core block (12) is connected to the cavity composite plate (1) below, the cavity core block (12) is inserted into the anti-skid rib cavity surface (6), a mold foot plate (7) is arranged on the core composite plate, a core bottom plate (8) is arranged on the mold foot plate, a core plate (9) is arranged on the core bottom plate, a core insert (10) is arranged in the core plate, the core insert (10) cooperates with the cavity insert (5), and the core insert (10) ) is provided with an anti-rotation protrusion (11), a core rod (13) with a thread groove (15) on the upper end is provided on the core bottom plate (8), the core rod (13) with the thread groove (15) passes through the core plate and the core insert, and is plugged into the cavity core block (12), and forms a mold cavity (16) with the anti-slip rib cavity surface (6), the core insert (10) and the anti-rotation protrusion (11), a gate sleeve (17) is also provided on the cavity composite plate, and a glue port (18) is connected to the gate sleeve below, and the glue port (18) is connected to the mold cavity (16), and the mold cavity (16) is used to fill the injection molding material.
2. The molding structure of the anti-rotation plastic pipe nut mold according to claim 1, characterized in that The cavity insert (5) and the core insert (10) are provided with cooling water channels (19).
3. The molding structure of the anti-rotation plastic pipe nut mold according to claim 1, characterized in that The cavity core block (12) and the core rod (13) are provided with cooling water holes (20).