Mold capable of reducing sprue residues
By designing arc-shaped contact surfaces, corners and closed-circuit rubber inlet pipes in the mold, and setting up pulling needles in the lower mold, the problem of gate residues during injection molding is solved, and the product is better peeling and molding quality is improved.
Patent Information
- Application Number
- CN202420823575.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In the injection molding process, existing molds are prone to damage or residue when peeling off the gate residue, affecting the structural integrity and aesthetics of the product.
Design a mold, one end of the rubber pipe has an arc-shaped contact surface and communicates with the cavity, add corners and closed circuits to divert cooling materials, and set up a pulling needle on the lower mold to facilitate mold release, and a speed reduction structure is provided in the inner wall of the rubber pipe. to reduce outflow.
Reduces residuals at gate positions, ensures that the product is more likely to break when peeled off, and improves structural integrity and aesthetics after forming.
Smart Images
Figure CN222223338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molding, in particular to a mold capable of reducing gate residues. Background Art
[0002] In the injection molding process, the gate is the key part for introducing the molten material into the mold cavity, and plays a vital role in the molding quality of the product. With the continuous development of the industry, the requirements for the appearance and structural integrity of the product are getting higher and higher. However, after the existing mold is molded, it is easy to cause product damage or residue when stripping the gate residue. Utility Model Content
[0003] In view of the problem of gate residue after molding of the above-mentioned products, the utility model provides a mold for reducing gate residue.
[0004] A mold for reducing gate residues comprises an upper mold and a lower mold, wherein the lower mold is provided with a lower portion of a mold cavity and a lower portion of a glue inlet pipe, and the upper mold is provided with an upper portion of a mold cavity and an upper portion of a glue inlet pipe. When the upper mold and the lower mold are combined, a complete mold cavity and a glue inlet pipe are formed. The upper mold is also provided with a glue inlet, which is connected to one end of the glue inlet pipe, and the other end of the glue inlet pipe has an arc-shaped contact surface, and the glue inlet pipe is connected to the mold cavity through the arc-shaped contact surface.
[0005] Optionally, the glue inlet pipeline is provided with at least one corner, and the corner is provided with at least one extended closed circuit.
[0006] Optionally, at least one pulling needle is further included, and the lower mold is provided with a through hole connected to the glue feeding pipeline, one end of the pulling needle is located in the through hole, and the other end extends to the outside of the lower mold.
[0007] Optionally, a speed reduction structure is provided at one end of the inner wall of the glue inlet pipe close to the mold cavity.
[0008] The utility model provides a mold for reducing gate residue, wherein one end of the glue feeding pipe has an arcuate contact surface, and is connected to the cavity through the arcuate contact surface, so that the gate is smaller than the cross section of the glue feeding pipe and the cavity near the gate position, so that after molding, the connection surface between the product and the residual material in the glue feeding pipe is smaller, and during peeling, the product and the residual material are more easily disconnected along the connection interface, thus reducing the residue at the product gate position and ensuring the structural integrity and aesthetics of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 A schematic diagram of the overall structure of a mold for reducing gate residues provided by the utility model;
[0010] Figure 2The utility model is a schematic diagram of the lower mold structure of a mold for reducing gate residues. DETAILED DESCRIPTION
[0011] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0012] The present invention will be described in detail below with reference to the accompanying drawings, wherein the figure numerals are used to indicate various components and features.
[0013] like Figures 1-2 As shown, the utility model provides a mold for reducing gate residue, comprising an upper mold 1 and a lower mold 2, wherein the lower mold 2 is provided with a cavity lower portion 21 and a glue inlet pipe lower portion 22, and the upper mold 1 is provided with a cavity upper portion and a glue inlet pipe upper portion, and the upper mold 1 and the lower mold 2 are combined to form a complete cavity and a glue inlet pipe, and the upper mold 1 is also provided with a glue inlet 11, wherein the glue inlet 11 is connected to one end of the glue inlet pipe, and the other end of the glue inlet pipe has an arc-shaped contact surface 23, and the glue inlet pipe is connected to the cavity through the arc-shaped contact surface 23; the molten material enters from the glue inlet 11, After passing through the glue inlet pipe, it enters the cavity, and after cooling, the mold is opened to obtain a molded product. In this embodiment, the intersection of the glue inlet pipe and the cavity is the gate. Since the glue inlet pipe is connected to the cavity through the arc contact surface 23, it can be understood that no matter whether the contact surface of the cavity is arc or plane, its gate will be smaller than the cross-section of the glue inlet pipe and the cavity near the gate position. This makes the residual connection surface between the product and the glue inlet pipe smaller after molding. When peeling, the product and the residual material are more easily disconnected along the connection interface, which not only reduces the residue at the product gate position, but also ensures the structural integrity and aesthetics of the product.
[0014] In some embodiments, the glue inlet pipe is provided with at least one corner, and the corner is provided with at least one extended closed circuit 24;
[0015] In this embodiment, it can be understood that when the material in a molten state flows in the glue inlet pipe, its end will first gradually cool down. In order to reduce the impact of the cooling material entering the cavity on the quality after molding, an extended closed circuit 24 is added at the corner to divert the flowing material. The cooled material will be partially stored in the closed circuit 24, thereby reducing the inflow of cooling material into the cavity.
[0016] In some embodiments, in order to facilitate demolding after molding, at least one pulling needle 3 is also included. The lower mold 2 is provided with a through opening connected to the glue inlet pipe. One end of the pulling needle 3 is located in the through opening, and the other end extends to the outside of the lower mold 3. During demolding, the pulling needle 3 can be pushed out to eject the material in the glue inlet pipe.
[0017] In some embodiments, in order to reduce the outflow into the cavity and avoid the formation of streamlines in the product after molding, a deceleration structure is provided on the inner wall of the glue inlet pipe at one end close to the cavity; the deceleration structure includes a protrusion or depression arranged at the lower part 21 of the cavity and a corresponding depression or protrusion arranged at the upper part of the cavity.
[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A mold for reducing gate residue, comprising an upper mold and a lower mold, wherein the lower mold is provided with a lower portion of a mold cavity and a lower portion of a glue inlet pipe, and the upper mold is provided with an upper portion of a mold cavity and an upper portion of a glue inlet pipe. After the upper mold and the lower mold are combined, a complete mold cavity and a glue inlet pipe are formed, and the upper mold is further provided with a glue inlet, which is connected to one end of the glue inlet pipe, characterized in that: The other end of the glue inlet pipeline has an arc-shaped contact surface, and the glue inlet pipeline is connected with the mold cavity through the arc-shaped contact surface.
2. The mold for reducing gate residue according to claim 1, characterized in that: The glue inlet pipeline is provided with at least one corner, and the corner is provided with at least one extended closed circuit.
3. The mold for reducing gate residue according to claim 1, characterized in that: It also includes at least one pulling needle. The lower mold is provided with a through hole connected to the glue feeding pipeline. One end of the pulling needle is located in the through hole, and the other end extends to the outside of the lower mold.
4. The mold for reducing gate residue according to claim 1, characterized in that: A speed reduction structure is arranged on one end of the inner wall of the glue inlet pipe close to the mold cavity.