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CN-122007825-A - Preparation process for mold core conformal waterway

CN122007825ACN 122007825 ACN122007825 ACN 122007825ACN-122007825-A

Abstract

The invention provides a preparation process for a mold core conformal waterway, and belongs to the technical field of preparation processes. It has solved the lower problem of the shaping precision of current cooling water route. The preparation process for the mold core shape-following waterway comprises the following steps of 1, machining a metal seat with an inner cavity and an upward opening, 2, machining a cavity with the upward opening on the metal seat, continuously machining the shape-following waterway on the inner wall of the cavity through machining, designing the shape of the shape-following waterway according to the shape of a mold product, 3, shearing a plurality of sections of thin copper sheets, sequentially covering the shape-following waterway along the length direction of the shape-following waterway, placing two sides of the thin copper sheets on the cavity wall of the cavity, welding the thin copper sheets with the cavity wall of the cavity through welding materials, and welding the connecting parts of the adjacent thin copper sheets through welding materials. The preparation process for the mold core conformal waterway enables the molding accuracy of the conformal waterway to be higher.

Inventors

  • LI KEJIE
  • YING JIANHUA
  • ZHANG TAO
  • ZHOU XINLEI
  • CHEN JIANFU
  • JIANG MENGLIN
  • Tong Zihan
  • LAI XIAOXIANG

Assignees

  • 台州职业技术学院
  • 浙江赛豪实业有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (10)

  1. 1. The preparation process for the mold core conformal waterway is characterized by comprising the following steps of: Step 1, manufacturing a metal seat (2) with an inner cavity and an upward opening through machining; Step 2, machining a cavity (21) with an upward opening on the metal seat (2) through machining, and continuously machining a conformal waterway (22) on the inner wall of the cavity (21) through machining, wherein the shape of the conformal waterway (22) is designed according to the shape of a die product; Cutting a plurality of sections Bao Tongpian (3), sequentially covering the thin copper sheets (3) on the conformal waterway (22) along the length direction of the conformal waterway (22), placing two sides of the thin copper sheets (3) on the cavity wall of the cavity (21), and welding the thin copper sheets (3) with the cavity wall of the cavity (21) through welding materials, wherein the welding materials are adopted at the joints of adjacent Bao Tongpian (3); step 4, placing the casting sand core (4) into a cavity (21) of the metal seat (2), forming a molding space between the casting sand core (4) and the inner wall of the cavity (21), injecting aluminum alloy metal liquid into the molding space, and enabling the melting point of the welding flux to be higher than that of the aluminum alloy; step 5, forming a metal core (5) after cooling the aluminum alloy molten metal, welding the metal core (5) with the metal seat (2), taking out the casting sand core (4) by shakeout, and processing or punching the end part of a waterway of the metal core (5) to be communicated with the bottom; and 6, precisely machining the metal core (5) in the last step to form the surface of the core and the shape matched with the core seat.
  2. 2. The process for preparing a mold core conformal waterway according to claim 1, wherein in step 4, the Bao Tongpian (3) has a thickness of 0.3mm to 1.5mm.
  3. 3. The process for preparing a conformal waterway for mold cores according to claim 1 or 2, wherein in step 4, the width of the Bao Tongpian (3) sides covered on the cavity wall is 5 mm-10 mm.
  4. 4. A process for preparing a mould core conformal waterway according to claim 3, wherein in step 4, the width of the Bao Tongpian (3) sides covering the cavity wall is equal.
  5. 5. The process for preparing a mold core conformal waterway according to claim 1 or 2, wherein in step 2, an end of one end of the conformal waterway (22) is located at a center of a bottom wall of the cavity (21), and an end of the other end is located at an upper edge of the cavity (21).
  6. 6. The process for preparing a mold core conformal waterway according to claim 1 or 2, wherein in step 5, the metal core (5) comprises a shell (51) attached to a cavity wall of the cavity (21), a plurality of reinforcing ribs (52) are disposed in the shell (51), a reinforcing column (53) disposed vertically is disposed in a middle portion of the shell (51), the reinforcing column (53) is disposed on at least one reinforcing rib (52), and the reinforcing column (53) can process the water outlet channel (54).
  7. 7. The process for preparing a mold core conformal waterway according to claim 1 or 2, wherein in step 2 to step 6, the wall thickness of the metal seat (2) is 3 mm-15 mm.
  8. 8. The process for preparing a conformal waterway for mold cores according to claim 1 or 2, wherein in step 3, a pitch between two adjacent circles of conformal waterways (22) is 25 mm-50 mm.
  9. 9. The process for preparing a mold core conformal waterway according to claim 1 or 2, wherein in step 4, the solder is copper nickel solder.
  10. 10. The process for preparing a contoured waterway for mold cores according to claim 1 or 2, wherein in step 5, the cross section of the contoured waterway (22) is semicircular, and the diameter of the water outlet channel (54) is equal to the diameter of the contoured waterway (22).

Description

Preparation process for mold core conformal waterway Technical Field The invention belongs to the technical field of preparation processes, and relates to a preparation process for a mold core conformal waterway. Background When the mould is moulded plastics, in order to accelerate the cooling of injection moulding product, be provided with the cooling water route in the mould generally, cool down in to the mould, some moulds need to be provided with the water route along with it to reach better cooling effect. The prior processing method of the conformal waterway of the mould, such as Chinese patent application (publication number CN 103407134B) discloses a special-shaped cooling waterway structure of the mould and a processing method of the mould with the structure, which comprises the processing of a mould core with the special-shaped cooling waterway structure and the processing of other parts of the mould, wherein the other parts of the mould and the mould core with the special-shaped cooling waterway structure are integrally processed by adopting an additive manufacturing technology, and the special-shaped cooling waterway is annular around a forming cavity surface in the mould core and spirally arranged along the height direction of the forming cavity surface; the additive manufacturing technology comprises the following steps of 1, establishing a computer three-dimensional model for a mould part needing additive manufacturing, 2, carrying out two-dimensional treatment on the computer three-dimensional model established in the step 1, namely dividing the computer three-dimensional model into a series of two-dimensional patterns along the Z-axis direction according to equal layer thicknesses, 3, generating a corresponding laser scanning path according to the series of two-dimensional patterns in the step 2, 4, uniformly paving a layer of material powder on a processing platform of additive manufacturing equipment, 5, scanning the material powder on the processing platform according to the laser scanning path by utilizing high-energy laser or electron beams, melting and thickening the material powder scanned by the high-energy laser or electron beams to be fixedly connected to the surface of the processing platform, 6, paving a second layer of material powder on the surface of the processing platform on which the pattern is fused, 7, sequentially repeating the steps 5 and 6 until the mould part needing additive manufacturing is integrally formed, 8, integrally removing the mould part fused on the processing platform and the processing platform from the additive manufacturing equipment together, cleaning the surface of the injection mould and inner floating powder, and separating the injection mould from the surface of the processing platform in a linear cutting mode. In the structure, after computer three-dimensional modeling is adopted, the material powder is processed into a series of two-dimensional graphs, the material powder is scanned by high-energy laser or electron beams on a processing platform of the additive manufacturing equipment, and the material powder is melted and solidified to a mold part for integral forming after scanning, so that forming of a cooling water channel is realized, but the structure of the cooling water channel can cause accumulated dimensional errors of paths such as thermal deformation, powder spreading defects, processing damage and the like at positions such as a turning position or the inner side of a cavity wall, and the forming precision of the integral cooling water channel is affected, so that the forming of the cooling water channel is inaccurate. Disclosure of Invention The invention aims to solve the problems in the prior art, and provides a preparation process for a mold core conformal waterway, which aims to solve the technical problems that: how to solve the problem of lower molding accuracy of the existing cooling waterway. The aim of the invention can be achieved by the following technical scheme: the preparation process for the mold core conformal waterway is characterized by comprising the following steps of: Step 1, manufacturing a metal seat with an inner cavity and an upward opening by machining; Step 2, machining a cavity with an upward opening on the metal seat by machining, and continuously machining a conformal waterway on the inner wall of the cavity by machining, wherein the shape of the conformal waterway is designed according to the shape of a die product; Cutting a plurality of sections of copper sheets, sequentially covering the copper sheets on the conformal waterway along the length direction of the conformal waterway, placing two sides of the copper sheets on the cavity wall of the cavity, and welding the copper sheets with the cavity wall of the cavity through welding materials, wherein the welding materials are adopted at the joint of the adjacent copper sheets; Step 4, placing the casting sand core into a cavity of the metal seat, f