CN115609804A

CN115609804A - Manufacturing method of die part with conformal waterway

Info

Publication number: CN115609804A
Application number: CN202211135712.5A
Authority: CN
Inventors: 李克杰; 姚震; 李金国; 虞伟炳; 应建华; 郭国俊
Original assignee: Zhejiang Saihao Industrial Co ltd; Taizhou Vocational and Technical College
Current assignee: Zhejiang Saihao Industrial Co ltd; Taizhou Vocational and Technical College
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-01-17

Abstract

The invention provides a manufacturing method of a die part with a conformal waterway, and belongs to the technical field of die processing. The method solves the problems that the quality and the service life of the die part manufactured by the existing method are poor. The manufacturing method comprises the following steps: processing to form a part mold blank with a mold cavity outline surface; processing and hollowing one side of the part die blank, which is far away from the contour surface of the die cavity, to form a base body part with a cavity, processing to form a shape-following waterway pipe fitting model, placing the model in the cavity, and tightly adhering to the bottom wall of the cavity and fixing the model; pouring molten metal material liquid into the cavity to form a casting part, carrying out heat preservation treatment to melt the shape following waterway pipe fitting model and make the liquid generated by melting flow out of the casting part to form a shape following waterway, and finishing the manufacture after cooling to form the die part with the shape following waterway. The manufactured mould part is integrally formed by mould steel and cast metal, so that the quality and the service life of the mould are ensured, the formed following-up water path is an integral and complete water path without welding seams, and leakage is avoided.

Description

Manufacturing method of die part with conformal waterway

Technical Field

The invention belongs to the technical field of die machining, and relates to a manufacturing method of a die part with a conformal waterway.

Background

The mold is generally composed of several sets of parts, the several parts are combined to form a molding cavity, and water channels are usually required to be arranged around the molding cavity for cooling the mold. In a traditional mold, all the processing of the water channels are formed by drilling and punching, so that the formed water channels are generally in a straight-through type or a straight line cross type. The shape of the mold cavity is determined according to the shape of the workpiece to be processed, that is, most of the contour surfaces of the mold forming the mold cavity are not a plane but a curved surface, and the water channels are all located on the same plane, so that the distances from the center of the water channels to the parts of the contour surfaces of the mold cavity are uneven, the cooling effect is uneven, and the quality of the injection-molded workpiece is affected.

In order to solve the problems, people develop a mold with a shape following waterway inside, wherein the shape following waterway means that the waterway is distributed at the periphery of a mold cavity in a track consistent with the shape of the mold cavity, so that the waterway can be ensured to be consistent with the space between the waterway and the contour surface of the mold cavity, and the cooling effect is uniform.

The existing mould with the shape-following water channel inside is manufactured by the following method: for example, the Chinese patent application (application number: 201510051427.9) discloses a mold with a conformal waterway inside and a manufacturing method thereof, wherein the method comprises the following steps: firstly, splitting a mold core into an upper mold core, a lower mold core and a waterway from a waterway, and firstly manufacturing a waterway model and a lower mold core auxiliary forming jig; reuse metal powder suppression technique, with the lower mould benevolence mould of the supplementary shaping tool suppression of lower mould benevolence mould, place the water route model on lower mould benevolence model again, continue to fill metal powder and suppress again, finally form the mould benevolence model that water route model has been inlayed to inside in the shaping inslot, carry out the sintering degrease to this mould benevolence model, get rid of the water route model of resin preparation and go up, lower mould benevolence model integrated into one piece, then produce the inside mould benevolence that has the shape-following water route, should be the orbit distribution in the die cavity periphery unanimous with the die cavity shape along with the shape water route, can carry out even cooling to the die cavity.

The mold manufactured by the method is used for forming the conformal water channel in the mold, the mold is integrally sintered by metal forming powder through a degreasing furnace, the mold formed by sintering is loose in original structure, porous, has internal stress and is easy to manufacture, the contour surface of the mold cavity is rough and porous and is limited by the particle size of the powder and laser spots, post-treatment is difficult, and compared with the mold manufactured by machining with a mold steel machine, the mold is poor in quality and service life.

In order to ensure the quality of the mold, the conventional method is as follows: the method comprises the steps of firstly, forming a three-dimensional model of a mould part with a shape following waterway by software, then, carrying out layered treatment on the mould part according to the designed three-dimensional model to divide the mould part into plates in one layer, then, respectively carrying out solid manufacturing on the plates in one layer by adopting mould steel, processing corresponding shape following waterway flow channel sections on the plates in each layer, and then, carrying out diffusion welding on the processed plates to form a whole so that the corresponding flow channel sections on the plates are spliced to form the complete shape following waterway, thereby forming the mould part with the shape following waterway. The die steel has enough surface hardness, good core strength and toughness, better fatigue resistance, heat resistance and corrosion resistance and smaller heat treatment deformation performance. Therefore, the quality and the service life of the die can be guaranteed to a certain extent by the die part manufactured by the method, but the conformal water channel manufactured by the method is formed by welding after splicing, has welding marks, is easy to leak, and affects the use of the die.

Disclosure of Invention

The invention aims to provide a method for manufacturing a mould part with a conformal waterway, aiming at the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to realize the even assurance mould quality and life-span of cooling simultaneously.

The purpose of the invention can be realized by the following technical scheme: a method for manufacturing a mould part with a conformal waterway is characterized by comprising the following steps:

selecting die steel as a part base material to be processed to form a part die blank with a die cavity profile surface;

processing and hollowing one side of the part mould blank, which is deviated from the outline surface of the mould cavity, to form a base body part with a cavity, ensuring that approximately uniform wall thickness is formed between the bottom wall of the cavity and the outline surface of the mould cavity, selecting a pipe with a melting point lower than that of the mould steel, processing to form a shape-following waterway pipe fitting model, and placing the shape-following waterway pipe fitting model in the cavity to be tightly attached to the bottom wall of the cavity and fixing the shape-following waterway pipe fitting model;

selecting a metal material with a melting point higher than that of the pipe, pouring molten metal material liquid into the cavity to form a casting part, carrying out heat preservation treatment on the casting part and the base part which are connected into a whole after cooling, so that the conformal waterway pipe fitting model is molten, the liquid generated by melting flows out of the casting part to form a conformal waterway, and manufacturing the die part with the conformal waterway after cooling.

The mold is generally composed of a plurality of parts having a cavity contour surface, the plurality of parts can be mutually clamped to form a mold cavity, and the mold parts in the application refer to parts having the cavity contour surface in the mold, such as a movable mold and a fixed mold in an injection mold. The method subverts the manufacturing technology of the conventional die and adopts a mode of combining die steel machining and metal casting to realize the manufacturing of the die parts. The method comprises the steps of firstly processing the part mould blank with the mould cavity outline surface by adopting mould steel, then hollowing the back surface of the part mould blank to form a base part with a cavity, and ensuring that the bottom wall shape of the cavity is consistent with the mould cavity outline surface, so that the bottom wall of the cavity and the mould cavity outline surface can form an approximately uniform wall thickness. And then, processing to form a random waterway pipe fitting model distributed in a track consistent with the shape of the outline surface of the cavity, closely fixing the random waterway pipe fitting model on the bottom wall of the cavity, wherein the distance from the center of the cross section of the random waterway pipe fitting model to the outline surface of the cavity is consistent, pouring casting metal liquid into the cavity to fill the cavity (the random waterway pipe fitting model cannot be melted after the metal liquid is poured immediately), so as to form a casting part, the casting part and the base part are connected into a whole to form a mold part after the metal liquid is cooled and solidified, and then performing heat preservation treatment, so that the random waterway pipe fitting model is melted and flows out of the mold part, thereby forming a random waterway in the mold part.

The die part manufactured by the method is integrally formed by die steel and casting metal, namely the whole die part and the contour surface of the die cavity are manufactured by special die steel, and compared with the die part formed by sintering, the die part has enough surface hardness, good core strength and toughness, better fatigue resistance, heat resistance and corrosion resistance and smaller heat treatment deformation performance, and the quality and the service life of the die are ensured. The formed conformal water path is formed in the cast metal, is an integral water path and has no welding line, thereby avoiding leakage. The shape-following water route that forms simultaneously is more close to die cavity profile, does not receive the structure and the shape restriction of mould part, can guarantee that the cross-section center in this shape-following water route all keeps unanimous to the interval of die cavity profile, and the maximize has realized cooling water route system's rationalization design and overall arrangement, has shortened the cooling time in the thermoforming cycle for mould a product and obtain even cooling, cooling efficiency is higher.

In the manufacturing method of the die part with the shape-following waterway, the three-dimensional modeling design drawing of the die part with the shape-following waterway is designed and formed through 3D drawing software, and then the die steel is selected as the part base material according to the three-dimensional modeling design drawing to be processed to form the part die blank with the die cavity profile surface. The three-dimensional modeling is carried out firstly, so that the structure can be perfected before the manufacturing, and the error is reduced to the minimum.

Preferably, in the above method for manufacturing a mold part with a conformal water channel, the thickness of the wall formed between the bottom wall of the cavity and the contour surface of the cavity is ensured to be 3-15mm. Through keeping the wall thickness in foretell within range, can guarantee the intensity requirement of sufficient die cavity profiled surface, avoid die cavity profile face to take place to warp, guaranteed the quality and the life-span of mould, this wall thickness interval can guarantee good cooling interval again simultaneously, guarantees better cooling effect.

In the above method for manufacturing the mold part with the conformal waterway, in the step B, the conformal waterway pipe fitting model is fixed and then the water inlet end and the water outlet end are kept extending out of the cavity. The water inlet end and the water outlet end of the shape following waterway pipe fitting model are kept to extend out of the cavity, so that the situation that the molten metal liquid is blocked during the subsequent pouring into the cavity is avoided, the liquid generated after the shape following waterway pipe fitting model is melted in the subsequent heat preservation treatment process can smoothly flow out of the mold part, and a complete shape following waterway can be formed in the mold part. Preferably, the extension lengths of the water inlet end and the water outlet end of the conformal waterway pipe fitting model are more than or equal to 10cm.

In the manufacturing method of the mould part with the conformal water channel, the selected pipe is an aluminum pipe or a magnesium pipe, and the pipe diameter is 3-10mm. The magnesium pipe and the aluminum pipe are easy to machine and form into the shape following waterway pipe fitting model, the melting points of magnesium and aluminum are lower than those of die steel and casting metal, and the magnesium and the aluminum are easy to melt subsequently and flow out of the die part, so that the shape following waterway can be formed in the die part.

In the above method for manufacturing the mold part with the conformal water channel, the selected metal material is an alloy mainly made of iron or copper. The alloy has good bonding property with die steel after being poured, has a melting point far higher than that of aluminum and magnesium, and cannot deform in the subsequent heat preservation treatment process.

In the manufacturing method of the mould part with the conformal waterway, the heat preservation treatment is carried out in a vacuum environment, and the heat preservation temperature is 100-300 ℃ higher than the melting point of the pipe. The heat preservation treatment is carried out in a vacuum environment, so that the conformal waterway pipe fitting model is easier to melt and flows out of the mould part, the heat preservation temperature is kept to be 100-300 ℃ higher than the melting point of the pipe, the conformal waterway pipe fitting model can be fully melted, the residue is avoided, and the quality of the conformal waterway is guaranteed.

In the manufacturing method of the mould part with the conformal water channel, the heat preservation treatment time is 20-90 min. The heat preservation time is controlled within the range, so that the shape-following waterway pipe fitting model can be fully melted, the residue is avoided, and the thermal deformation of the die part caused by overlong heat preservation time can be avoided.

In the method for manufacturing the mold part with the conformal water channel, the casting part and/or the base part are provided with a plurality of process holes before the heat preservation treatment. Through set up the fabrication hole on the mould, assurance that can be better flows out from the mould part that can be better after the shape following water route pipe fitting model melts at the in-process that keeps warm, avoids remaining, guarantees the quality in shape following water route that forms.

In the above method for manufacturing a mold part having a conformal water channel, the mold part is further subjected to a finish machining process after the completion of the manufacturing. After the conformal water path is formed in the die part, the die part is subjected to finish machining treatment to enable the size and tolerance of the die part to meet the technical requirements of a three-dimensional modeling design drawing, and the finish machining generally comprises polishing, grinding and the like.

Compared with the prior art, the manufacturing method of the die part with the conformal waterway has the following advantages:

1. the manufactured die part is integrally formed by die steel and cast metal, namely the whole die part and the contour surface of the die cavity are made of special die steel, so that the die part has enough surface hardness, good core strength and toughness, good fatigue resistance, heat resistance and corrosion resistance and small heat treatment deformation performance, and the quality and the service life of the die are ensured.

2. The formed conformal water path is formed in the cast metal, is an integral water path and has no welding line, thereby avoiding leakage.

3. The shape-following water path is closer to the contour surface of the mold cavity, and is not limited by the structure and the shape of a mold part, so that the reasonable design and the layout of a cooling water path system are realized to the maximum extent, the cooling time in the thermal forming circulation period is shortened, the plastic product is uniformly cooled, and the cooling efficiency is higher.

Drawings

FIG. 1 is a schematic diagram of a process for manufacturing a mold part with a shape-following waterway by using the method.

In the figure: 1. a base portion; 11. a mold cavity profile surface; 12. a cavity; 2. a casting section; 3. a conformal waterway pipe fitting model; 4. a conformal waterway.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, the mold component with the conformal water channel comprises a base part 11 made of mold steel and a casting part 12 formed by casting a metal material, and is manufactured by the following method, wherein the method comprises the following steps:

the method comprises the steps of firstly forming a three-dimensional modeling design drawing of the die part with the shape-following water channel 4 through 3D drawing software design, selecting die steel as a part base material, roughly processing the part base material according to the three-dimensional modeling design drawing when the melting point of the die steel is between 1300 and 1400 ℃, and forming a part die blank with a die cavity contour surface 11 (as shown in step A in figure 1).

Machining and hollowing are carried out on one side of the part blank, which is far away from the die cavity profile surface 11 (namely, one side of the die part, which is used for being matched with a die plate), through a machining method such as numerical control and the like to form a base body part 1 with a cavity body 12, and the shape of the bottom wall of the cavity body 12 is ensured to be consistent with the die cavity profile surface 11, so that a substantially uniform wall thickness can be formed between the bottom wall of the cavity body 12 and the die cavity profile surface 11 (as shown in step B1 in fig. 1), and particularly, the wall thickness formed between the bottom wall of the cavity body 12 and the die cavity profile surface 11 is ensured to be 3mm.

Selecting a pipe material with a melting point lower than that of the die steel, specifically a magnesium pipe, wherein the melting point of the magnesium pipe is 651 ℃, and the pipe diameter of the magnesium pipe is 3mm. The pipe is processed to form a conformal waterway pipe model 3 distributed in a track shape consistent with the shape of the die cavity contour surface 11, and in the conformal waterway pipe model 3, the distance between adjacent pipe sections is kept to be 6mm. The shape following waterway pipe fitting model 3 is arranged in the cavity 12 and is tightly fixed on the bottom wall of the cavity 12 (the specific fixing mode can be through welding), so that the distance from the center of the cross section of the shape following waterway pipe fitting model 3 to the contour surface 11 of the mold cavity is ensured to be consistent. Meanwhile, the water inlet end and the water outlet end of the conformal waterway pipe fitting model 3 are both extended out of the cavity 12, and the specific extension length is 10cm (as shown in step B2 in FIG. 1).

The metal material with the melting point higher than that of the pipe is selected, and specifically, the metal material can be an alloy taking copper as a main material, and the melting point is about 1000 ℃. The molten metal material liquid is poured into the cavity 12 to fill the entire cavity to form the casting portion 2, and the base portion 1 and the casting portion 2 are integrally connected after cooling, solidification and molding (as shown in step C1 in fig. 1).

And (3) placing the base body part 1 and the casting part 2 which are cooled, solidified and integrated into a whole in a vacuum environment for heat preservation treatment, controlling the heat preservation temperature to be more than 100 ℃ of the melting point of the pipe, namely controlling the heat preservation temperature to be 851 ℃ and controlling the heat preservation time to be 90min, so that the random waterway pipe fitting model 3 is melted, liquid generated by melting flows out of the casting part 2, a random waterway 4 is formed in the casting part 2, and after cooling, manufacturing the die part with the random waterway 4 (as shown in a step C2 in the figure 1). And then, performing finish machining on the die part to enable the size and tolerance of the die part to meet the technical requirements of a three-dimensional modeling design drawing, and finishing the manufacture.

The die part manufactured by the method is integrally formed by die steel and cast metal, and compared with the die part formed by sintering, the die part has enough surface hardness, good core strength and toughness, better fatigue resistance, heat resistance and corrosion resistance and smaller heat treatment deformation performance, and ensures the quality and the service life of the die. And the formed conformal water path 4 is formed in the cast metal, is an integral water path and has no welding line, thereby avoiding leakage. The shape-following water route that forms simultaneously is more close to die cavity profile, does not receive the structure and the shape restriction of mould part, can guarantee that the cross-section center in this shape-following water route all keeps unanimous to the interval of die cavity profile, and the maximize has realized cooling water route system's rationalization design and overall arrangement, has shortened the cooling time in the thermoforming cycle for mould a product and obtain even cooling, cooling efficiency is higher.

Example two

The mould part with the conformal waterway comprises a base body part 11 made of mould steel and a casting part 12 formed by casting a metal material, and is manufactured by the following method, wherein the method comprises the following steps:

firstly, designing and forming a three-dimensional modeling design drawing of a die part with a shape-following water path 4 through 3D drawing software, selecting die steel as a part base material, and roughly processing the part base material by referring to the three-dimensional modeling design drawing to form a part die blank with a die cavity contour surface 11; the melting point of the die steel is 1300-1400 ℃.

Machining and hollowing are carried out on one side (namely one side of the die part matched with the die plate) of the part die blank, which is far away from the die cavity outline surface 11, by a machining method such as numerical control and the like to form a base body part 1 with a cavity 12, and the shape of the bottom wall of the cavity 12 is ensured to be consistent with the die cavity outline surface 11, so that a substantially uniform wall thickness can be formed between the bottom wall of the cavity 12 and the die cavity outline surface 11, and particularly, the wall thickness formed between the bottom wall of the cavity 12 and the die cavity outline surface 11 is ensured to be 9mm.

Selecting a pipe with a melting point lower than that of the die steel, specifically an aluminum pipe, wherein the melting point of the aluminum pipe is 660 ℃, and the pipe diameter is 6mm. The pipe is processed to form a conformal waterway pipe model 3 distributed in a track shape consistent with the shape of the die cavity contour surface 11, and in the conformal waterway pipe model 3, the distance between adjacent pipe sections is kept to be 18mm. The shape following waterway pipe fitting model 3 is arranged in the cavity 12 and is tightly fixed on the bottom wall of the cavity 12 (the specific fixing mode can be through welding), so that the distance from the center of the cross section of the shape following waterway pipe fitting model 3 to the contour surface 11 of the mold cavity is ensured to be consistent. Meanwhile, the water inlet end and the water outlet end of the conformal waterway pipe fitting model 3 are both kept to extend out of the cavity 12, and the specific extension length is 12cm.

C. The metal material with the melting point higher than that of the pipe is selected, and the metal material can be an alloy taking iron as a main material, and the melting point is about 1300 ℃. Pouring molten metal material liquid into the cavity 12 to fill the whole cavity 12 to form a casting part 2, cooling, solidifying and forming to connect the base part 1 and the casting part 2 into a whole, and then forming a plurality of process holes on the base part 1 and/or the casting part 2.

And (3) placing the base body part 1 and the casting part 2 which are connected into a whole in a vacuum environment for heat preservation treatment, controlling the heat preservation temperature to be more than 200 ℃ of the melting point of the pipe, namely controlling the heat preservation temperature to be 860 ℃ and controlling the heat preservation time to be 55min, so that the conformal waterway pipe fitting model 3 is melted, liquid generated by melting flows out of the casting part 2, a conformal waterway 4 is formed in the casting part 2, and cooling to finish the manufacture of the die part with the conformal waterway 4. And then, performing finish machining on the die part to enable the size and tolerance of the die part to meet the technical requirements of a three-dimensional modeling design drawing, and finishing the manufacture.

EXAMPLE III

Machining and hollowing are carried out on one side (namely one side of the die part matched with the die plate) of the part die blank, which is far away from the die cavity outline surface 11, by a machining method such as numerical control and the like to form a base body part 1 with a cavity 12, and the shape of the bottom wall of the cavity 12 is ensured to be consistent with the die cavity outline surface 11, so that a substantially uniform wall thickness can be formed between the bottom wall of the cavity 12 and the die cavity outline surface 11, and particularly, the wall thickness formed between the bottom wall of the cavity 12 and the die cavity outline surface 11 is ensured to be 15mm.

Selecting a pipe with a melting point lower than that of the die steel, specifically an aluminum pipe, wherein the melting point of the aluminum pipe is 660 ℃, and the pipe diameter of the aluminum pipe is 10mm. The pipe is processed to form a conformal waterway pipe model 3 distributed in a track shape consistent with the shape of the die cavity contour surface 11, and in the conformal waterway pipe model 3, the distance between adjacent pipe sections is kept to be 30mm. The shape following waterway pipe fitting model 3 is arranged in the cavity 12 and is tightly fixed on the bottom wall of the cavity 12 (the specific fixing mode can be through welding), so that the distance from the center of the cross section of the shape following waterway pipe fitting model 3 to the contour surface 11 of the mold cavity is ensured to be consistent. Meanwhile, the water inlet end and the water outlet end of the conformal waterway pipe fitting model 3 are both extended out of the cavity 12, and the specific extension length is 15cm.

The metal material with the melting point higher than that of the pipe is selected, and particularly, the alloy melting point with iron as a main material is about 1300 ℃. The molten metal material liquid is poured into the cavity 12 to fill the entire cavity 12 to form the casting portion 2, and the casting portion 2 and the base portion 1 are integrally connected after cooling, solidifying and molding. Then, a plurality of process holes are arranged on the base body part 1 and/or the casting part 2.

And (3) placing the casting part 2 and the base body part 1 which are connected into a whole in a vacuum environment for heat preservation treatment, wherein the heat preservation temperature is controlled to be more than 300 ℃ higher than the melting point of the pipe, namely the heat preservation temperature is controlled to be 960 ℃. And controlling the heat preservation time to be 20min, melting the conformal waterway pipe fitting model 3, enabling liquid generated by melting to flow out of the casting part, forming a conformal waterway 4 in the casting part 2, and cooling to finish manufacturing the die part with the conformal waterway 4. And then, performing finish machining on the die part to enable the size and tolerance of the die part to meet the technical requirements of a three-dimensional modeling design drawing, and finishing the manufacture.

The die part manufactured by the method is integrally formed by die steel and cast metal, and compared with the die part formed by sintering, the die part has enough surface hardness, good core strength and toughness, better fatigue resistance, heat resistance and corrosion resistance and smaller heat treatment deformation performance, and ensures the quality and the service life of the die. And the formed conformal water path is formed in the cast metal, and is an integral water path without welding seams, so that leakage is avoided. The shape-following water route that forms simultaneously is more close to die cavity profile, does not receive the structure and the shape restriction of mould part, can guarantee that the cross-section center in this shape-following water route all keeps unanimous to the interval of die cavity profile, and the maximize has realized cooling water route system's rationalization design and overall arrangement, has shortened the cooling time in the thermoforming cycle for mould a product and obtain even cooling, cooling efficiency is higher.

Example four

Machining and hollowing are carried out on one side (namely one side of the die part matched with the die plate) of the part die blank, which is far away from the die cavity outline surface 11, by a machining method such as numerical control and the like to form a base body part 1 with a cavity 12, and the shape of the bottom wall of the cavity 12 is ensured to be consistent with the die cavity outline surface 11, so that a substantially uniform wall thickness can be formed between the bottom wall of the cavity 12 and the die cavity outline surface 11, and particularly, the wall thickness formed between the bottom wall of the cavity 12 and the die cavity outline surface 11 is ensured to be 7mm.

Selecting a pipe with a melting point lower than that of the die steel, specifically an aluminum pipe, wherein the melting point of the aluminum pipe is 660 ℃, and the pipe diameter is 5mm. The pipe is processed to form a conformal waterway pipe model 3 distributed in a track shape consistent with the shape of the die cavity contour surface 11, and in the conformal waterway pipe model 3, the distance between adjacent pipe sections is kept to be 10mm. The shape following waterway pipe fitting model 3 is arranged in the cavity 12 and is tightly fixed on the bottom wall of the cavity 12 (the specific fixing mode can be through welding), so that the distance from the center of the cross section of the shape following waterway pipe fitting model 3 to the contour surface 11 of the mold cavity is ensured to be consistent. Meanwhile, the water inlet end and the water outlet end of the conformal waterway pipe fitting model 3 are kept to extend out of the cavity, and the specific extension length is 13cm.

C. The metal material with the melting point higher than that of the pipe is selected, and specifically, the metal material can be an alloy taking copper as a main material, and the melting point is about 1000 ℃. The molten metal material liquid is poured into the cavity 12 to fill the entire cavity 12 to form the casting portion 2, and the casting portion 2 and the base portion 1 are integrally connected after cooling, solidifying and molding.

And (3) placing the casting part 2 and the base part 1 which are connected into a whole in a vacuum environment for heat preservation treatment, controlling the heat preservation temperature to be more than 220 ℃ of the melting point of the pipe, namely controlling the heat preservation temperature to be 880 ℃, and controlling the heat preservation time to be 45min, so that the conformal waterway pipe fitting model 3 is melted, liquid generated by melting flows out of the casting part 2, a conformal waterway 4 is formed in the casting part 2, and the mold part with the conformal waterway 4 is manufactured after cooling. And then, performing finish machining on the die part to enable the size and tolerance of the die part to meet the technical requirements of a three-dimensional modeling design drawing, and finishing the manufacture.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A method for manufacturing a mould part with a conformal waterway is characterized by comprising the following steps:

selecting die steel as a part base material to be processed to form a part die blank with a die cavity outline surface (11);

processing and hollowing one side of the part die blank, which is far away from the die cavity profile surface (11), to form a base body part (1) with a cavity (12), ensuring that approximately uniform wall thickness is formed between the bottom wall of the cavity (12) and the die cavity profile surface (11), selecting a pipe with a melting point lower than that of the die steel, processing to form a shape-following waterway pipe fitting model (3), and placing the shape-following waterway pipe fitting model (3) in the cavity (12) to be tightly attached to the bottom wall of the cavity (12) and fixing;

selecting a metal material with a melting point higher than that of the pipe, pouring molten metal material liquid into the cavity (12) to form a casting part (2), carrying out heat preservation treatment on the casting part (2) and the base part (1) which are connected into a whole after cooling so as to melt the conformal waterway pipe fitting model (3) and enable the liquid generated by melting to flow out of the casting part (2) to form a conformal waterway (4), and finishing the manufacture after cooling to form the die part with the conformal waterway (4).

2. The method for manufacturing the mould part with the form waterway according to the claim 1, wherein the wall thickness formed between the bottom wall of the cavity (12) and the contour surface (11) of the cavity is ensured to be 3-15mm.

3. The method for manufacturing the die part with the conformal waterway according to the claim 1 or 2, wherein the conformal waterway pipe fitting model (3) is fixed to keep the water inlet end and the water outlet end both extending out of the cavity (12).

4. The method for manufacturing the die part with the conformal waterway according to claim 3, wherein the protruding lengths of the water inlet end and the water outlet end of the conformal waterway pipe fitting model (3) are more than or equal to 10cm.

5. The method for manufacturing the die part with the conformal waterway according to the claim 1 or 2, wherein the heat preservation treatment is performed in a vacuum environment, and the heat preservation temperature is 100-300 ℃ higher than the melting point of the pipe.

6. The method for manufacturing the die part with the conformal waterway according to claim 5, wherein the heat preservation time is 20-90 min.

7. The method for manufacturing the mold part with the conformal waterway according to claim 6, wherein a plurality of process holes are formed on the casting part (2) and/or the base part (1) before the heat preservation treatment.

8. The method for manufacturing the die part with the shape-following waterway according to the claim 1 or 2, wherein a three-dimensional modeling design drawing of the die part with the shape-following waterway (4) is designed and formed through 3D drawing software, and then die steel is selected as a part base material according to the three-dimensional modeling design drawing to be processed and formed into a part die blank with a die cavity contour surface (11).

9. The method for manufacturing the die part with the conformal waterway according to claim 8, wherein the die part is further subjected to finish machining after the manufacturing is completed.

10. The method for manufacturing the die part with the conformal waterway according to the claim 1 or 2, wherein the selected pipe is an aluminum pipe or a magnesium pipe, the pipe diameter is 3-10mm, and the selected metal material is an alloy taking iron or copper as a main material.