CN106735212B - 3D printing integrated structure exhaust insert mold core method and exhaust insert mold core - Google Patents

Abstract

The invention discloses a 3D printing integrated structure exhaust insert mold core method, which comprises the following steps: (1) establishing a three-dimensional modeling model of a mold core and an exhaust insert of an integrated structure through CAD auxiliary software, wherein the exhaust insert is positioned in the middle of the mold core; (2) processing the three-dimensional modeling model by CAD (computer-aided design) modeling and layered slicing software to obtain data of each layer required by a 3D printer of the mold insert and the exhaust insert, wherein the data of each layer comprises a mold insert laser sintering area and an exhaust insert laser sintering area; importing each layer of data into a 3D printer, and respectively setting scanning parameters of a mold core laser sintering area and an exhaust insert laser sintering area in the 3D printer; (3) scanning layer by layer according to the data of each layer of laser scanning, forming a compact-structure mold core in a mold core laser sintering area, forming an exhaust insert with a plurality of clearance hole structures in a laser sintering area of the exhaust insert, and integrating the exhaust insert and the mold core into a whole. The invention also discloses an exhaust insert mold core.

Description

3D printing integral structure exhaust insert mold core method and exhaust insert mold core

technical field

The invention relates to the technical field of mold preparation, in particular to a method for 3D printing an integrated structure exhaust insert mold core, and the exhaust insert mold core for implementing the method.

Background technique

Because injection molds require an exhaust system, especially in deep bone areas. At present, many mold manufacturers use the form of inserts to solve the problem of trapped air in the place where the air is trapped. Since the insert and the mold core are two separate entities, there will be a gap when the mold is assembled, and the pressure is very high during injection molding. If it is too large, it will often produce a front in the gap between the insert and the mold core, which will affect the appearance of the injection molded product and fail to meet the customer's requirements.

Contents of the invention

This invention is aimed at the deficiencies of the current technology, and provides a method for 3D printing an integrated structure exhaust insert mold core, and manufactures an integrated structure mold core and exhaust insert through 3D printing technology to improve the exhaust of the mold and prevent the generation of the front. Improve injection molding quality.

The invention also provides a vent insert mold core implementing the preparation method.

The technical scheme that the present invention adopts for realizing the above object is:

A method for 3D printing an integral structure exhaust insert mold core, characterized in that it comprises the following steps:

(1) Establish the three-dimensional modeling model of the mold core and the exhaust insert of an integrated structure by CAD auxiliary software, and the exhaust insert is located at the middle part of the mold core;

(2) Set up a 3D printer for laser sintering, and process the 3D modeling model in step (1) through CAD modeling and layered slicing software to obtain a mold core with an integrated structure and each layer required by the 3D printer for exhaust inserts Data, each layer of data includes the laser sintering area of the mold core and the laser sintering area of the exhaust insert; import the data of each layer into the 3D printer, and set the laser sintering area of the mold core and the laser sintering of the exhaust insert in the 3D printer The scan parameters of the area;

(3) Carry out layer-by-layer scanning according to the laser scanning data of each layer in step (2), the laser sintering area of the mold core forms a mold core with a dense structure, and the laser sintering area of the exhaust insert forms an exhaust insert with multiple interstitial hole structures Parts, the exhaust insert and the mold core are integrated.

As a further improvement, in the step (3), the process of layer-by-layer scanning includes the following steps:

(31) When the laser beam scans one layer, when the laser beam scans the laser sintering area of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the laser beam scanning track of the next line is the same as that of the previous line. A row of laser beam scanning tracks is provided with overlapping parts;

When the laser beam scans the laser sintering area of the exhaust insert, the laser beam scans line by line in the same horizontal or vertical direction, and there is an gap;

(32) When the laser beam scans the previous laser beam scanning layer and scans the next laser beam scanning layer,

When the laser beam scans the laser sintering area of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the laser beam scanning track of the next line overlaps with the scanning track of the previous line of laser beam;

When the laser beam scans the laser sintering area of the exhaust insert, the laser beam scans line by line in the same horizontal or vertical direction, and there is an gap,

The laser beam scanning direction of the exhaust insert laser sintering area of the latter laser beam scanning layer crosses the laser beam scanning direction of the exhaust insert laser sintering area of the previous laser beam scanning layer; each row of laser beams in the previous laser beam scanning layer The gaps between beam scanning tracks overlap with the gaps between each row of laser beam scanning tracks in the subsequent laser beam scanning layer to form a gap hole, which is the exhaust hole of the exhaust insert.

As a further improvement, the 3D printing integrated structure exhaust insert mold core method also includes the following steps:

(4) Suck out the metal powder in the gap hole.

As a further improvement, the direction of the clearance hole is a vertical direction, which penetrates the exhaust insert from top to bottom, and communicates the inside of the mold core with the outside.

As a further improvement, in step (32), the laser beam scanning direction of the exhaust insert laser sintering area of the latter laser beam scanning layer is in the same direction as the laser beam scanning direction of the exhaust insert laser sintering area of the previous laser beam scanning layer Cross vertically, or cross diagonally.

As a further improvement, in step (31) or (32), when the laser beam scans the laser sintering area of the mold core, the laser beam scans line by line in the same direction as the horizontal direction or the same as the vertical direction, and the last line of laser beam scanning track There is an overlapping portion with the laser beam scanning track of the previous row, and the overlapping portion is 30% of the laser beam scanning track.

An exhaust insert mold core for implementing the above-mentioned method of 3D printing an integrated structure exhaust insert mold core, the exhaust insert mold core is an integral structure composed of a mold core and an exhaust insert, and the exhaust insert Located in the middle of the mold core, multiple clearance holes are printed in the exhaust insert.

As a further improvement, the direction of the clearance hole is a vertical direction, which penetrates the exhaust insert from top to bottom, and communicates the inside of the mold core with the outside.

As a further improvement, the interstitial holes are arranged vertically, and metal powder is arranged in the holes.

As a further improvement, the clearance hole is a through hole arranged vertically.

Beneficial effects of the present invention: the present invention manufactures an integrated mold core and exhaust insert through 3D printing. When the mold core and exhaust insert are injected, the exhaust function can be realized, and the gas in the mold cavity passes through the exhaust insert. The gap holes in the hole are discharged smoothly to solve the problem of trapped air. At the same time, because the mold core and the exhaust insert are integrally structured, there will be no peaks in the gap between the exhaust insert and the mold core during injection molding due to high pressure. Injection molding The appearance of the product is beautiful and flawless.

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the schematic structural view of the mold core and exhaust insert of the integrated structure of the present embodiment;

Fig. 2 is a schematic structural diagram of the exhaust insert of the present embodiment;

Fig. 3 is a schematic diagram of a laser beam scanning layer of the laser beam scanning track in the laser sintering area of the mold core;

Fig. 4 is a schematic diagram of two laser beam scanning layers of the laser beam scanning track in the laser sintering area of the exhaust insert;

Fig. 5 is a schematic diagram of the enlarged structure of part A in Fig. 4;

In the figure: 1. Mold core laser sintering area, 2. Exhaust insert laser sintering area, 3. Laser beam scanning track, 4. Overlapping part, 5. Gap, 6. Gap hole, 7. Laser beam scanning layer.

Detailed ways

Embodiments, referring to Figures 1 to 5, the method for 3D printing an integrated exhaust insert mold core provided by this embodiment includes the following steps:

(1) Establish the three-dimensional modeling model of the mold core and the exhaust insert of an integrated structure by CAD auxiliary software, and the exhaust insert is located at the middle part of the mold core;

(2) Set up a 3D printer for laser sintering, and process the 3D modeling model in step (1) through CAD modeling and layered slicing software to obtain a mold core with an integrated structure and each layer required by the 3D printer for exhaust inserts Data, each layer of data includes the laser sintering area 1 of the mold core and the laser sintering area 2 of the exhaust insert; import the data of each layer into the 3D printer, and set the laser sintering area 1 of the mold core and the exhaust insert in the 3D printer respectively. The scanning parameters of the laser sintering area 2 of the workpiece;

(3) Carry out layer-by-layer scanning according to the laser scanning data of each layer in step (2), the laser sintering area 1 of the mold core forms a mold core with a dense structure, and the laser sintering area of the exhaust insert forms a row of multiple gap holes 6 structures Gas inserts, exhaust inserts and mold cores are integrated, and the layer-by-layer scanning process includes the following steps:

(31) When the laser beam scans one layer, when the laser beam scans the laser sintering area 1 of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the last line of laser beam scanning track 3 An overlapping portion 4 is provided with the previous row of laser beam scanning tracks 3;

When the laser beam scans the laser sintering area of the exhaust insert, the laser beam scans line by line in the same horizontal or vertical direction, and the distance between the laser beam scanning track 3 in the next line and the laser beam scanning track 3 in the previous line a gap 5 is provided;

(32) When the laser beam finishes scanning the previous laser beam scanning layer 7 and then scans the latter laser beam scanning layer 7,

When the laser beam scans the laser sintering area 1 of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the laser beam scanning track 3 of the next line overlaps with the laser beam scanning track 3 of the previous line 4;

When the laser beam scans the laser sintering area of the exhaust insert, the laser beam scans line by line in the same horizontal or vertical direction, and the distance between the laser beam scanning track 3 in the next line and the laser beam scanning track 3 in the previous line with gap 5,

The laser beam scanning direction of the exhaust insert laser sintering area 2 of the latter laser beam scanning layer 7 intersects with the laser beam scanning direction of the exhaust insert laser sintering area 2 of the previous laser beam scanning layer 7; the previous laser beam scanning The gap 5 between each row of laser beam scanning tracks 3 in the layer 7 and the gap 5 between each row of laser beam scanning tracks 3 in the next laser beam scanning layer 7 are alternately overlapped to form a gap hole 6, which is an exhaust inlay. The exhaust hole of the part; the laser beam scanning direction of the exhaust insert laser sintering area 2 of the latter laser beam scanning layer 7 is in the same direction as the laser beam scanning direction of the exhaust insert laser sintering area 2 of the previous laser beam scanning layer 7 cross vertically, or cross diagonally;

(4) Suck out the metal powder in the gap hole 6 .

In the above step (31) or (32), when the laser beam scans the laser sintering area 1 of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the laser beam scanning track 3 of the last row is in line with the The previous row of laser beam scanning tracks 3 is provided with an overlapping portion 4 , and the overlapping portion 4 is 30% of the laser beam scanning track 3 .

The direction of the gap hole 6 is the vertical direction, which penetrates the exhaust insert from top to bottom, and communicates the inside of the mold core with the outside.

This embodiment also provides the exhaust insert mold core, the exhaust insert mold core is an integrated structure composed of the mold core and the exhaust insert, the exhaust insert is located in the middle of the mold core, and the exhaust A plurality of clearance holes 6 are printed in the insert.

The direction of the gap hole 6 is the vertical direction, which penetrates the exhaust insert from top to bottom, communicates the inside of the mold core with the outside, and leads out the air trapped in the mold core.

The clearance holes 6 are arranged vertically, and metal powder is arranged in the holes, or the clearance holes 6 are through holes arranged vertically.

The printed mold core and exhaust insert are integrated and inseparable.

The present invention is not limited to the above-mentioned embodiments, and other 3D printing integrated structure exhaust insert mold core methods and exhaust insert mold cores obtained by adopting the same or similar methods or structures as the above-mentioned embodiments of the present invention are all included in the present invention. within the scope of protection.

Claims (10)

1. A 3D printing integrated structure exhaust insert mold kernel method, is characterized in that, it comprises the following steps: (1) Establish the three-dimensional modeling model of the mold core and the exhaust insert of an integrated structure by CAD auxiliary software, and the exhaust insert is located at the middle part of the mold core; (2) Set up a 3D printer for laser sintering, and process the 3D modeling model in step (1) through CAD modeling and layered slicing software to obtain a mold core with an integrated structure and each layer required by the 3D printer for exhaust inserts Data, each layer of data includes the laser sintering area of the mold core and the laser sintering area of the exhaust insert; import the data of each layer into the 3D printer, and set the laser sintering area of the mold core and the laser sintering of the exhaust insert in the 3D printer The scan parameters of the area; (3) Carry out layer-by-layer scanning according to the laser scanning data of each layer in step (2), the laser sintering area of the mold core forms a mold core with a dense structure, and the laser sintering area of the exhaust insert forms an exhaust insert with multiple interstitial hole structures Parts, the exhaust insert and the mold core are integrated. 2. The 3D printing integrated structure exhaust insert mold core method according to claim 1, characterized in that, in the step (3), the process of layer-by-layer scanning comprises the following steps: (31) When the laser beam scans one layer, when the laser beam scans the laser sintering area of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the laser beam scanning track of the next line is the same as that of the previous line. A row of laser beam scanning tracks is provided with overlapping parts; When the laser beam scans the laser sintering area of the exhaust insert, the laser beam scans line by line in the same horizontal or vertical direction, and there is an gap; (32) When the laser beam scans the previous laser beam scanning layer and scans the next laser beam scanning layer, When the laser beam scans the laser sintering area of the mold core, the laser beam scans line by line in the same horizontal or vertical direction, and the laser beam scanning track of the next line overlaps with the scanning track of the previous line of laser beam; When the laser beam scans the laser sintering area of the exhaust insert, the laser beam scans line by line in the same horizontal or vertical direction, and there is an gap, The laser beam scanning direction of the exhaust insert laser sintering area of the latter laser beam scanning layer crosses the laser beam scanning direction of the exhaust insert laser sintering area of the previous laser beam scanning layer; each row of laser beams in the previous laser beam scanning layer The gaps between beam scanning tracks overlap with the gaps between each row of laser beam scanning tracks in the subsequent laser beam scanning layer to form a gap hole, which is the exhaust hole of the exhaust insert. 3. The 3D printing integrated structure exhaust insert mold core method according to claim 2, characterized in that it also includes the following steps: (4) Suck out the metal powder in the gap hole. 4. The method for 3D printing an integrated structure exhaust insert mold core according to claim 2, characterized in that the direction of the clearance hole is a vertical direction, and runs through the exhaust insert from top to bottom, and the inside of the mold core is communicate with the outside world. 5. The 3D printing integrated structure exhaust insert mold core method according to claim 2, characterized in that, in step (32), the laser beam scanning direction of the exhaust insert laser sintering area of the latter laser beam scanning layer The laser beam scanning direction of the exhaust insert laser sintering area of the previous laser beam scanning layer is vertically intersected, or obliquely intersected. 6. The method for 3D printing an integrated structure exhaust insert mold core according to claim 2, characterized in that, in step (31) or (32), when the laser beam scans the laser sintering area of the mold core, the laser beam uses Both horizontal and vertical directions are scanned line by line, and the laser beam scanning track of the latter line is overlapped with the previous line of laser beam scanning track, and the overlapping portion is 30% of the laser beam scanning track. 7. An exhaust insert mold core made by the 3D printing integral structure exhaust insert mold core method according to one of claims 1 to 6, characterized in that, the exhaust insert mold core is a mold core and An integrated structure composed of exhaust inserts, the exhaust insert is located in the middle of the mold core, and multiple clearance holes are printed in the exhaust insert. 8 . The venting insert mold core according to claim 7 , wherein the direction of the clearance hole is a vertical direction, which penetrates the exhaust insert from top to bottom, and connects the inside of the mold core with the outside. 9. The exhaust insert mold core according to claim 7, characterized in that, the clearance holes are arranged vertically, and metal powder is arranged in the holes. 10. The venting insert mold core according to claim 7, characterized in that, the clearance hole is a through hole arranged vertically.