Design method of injection molding structure for double-color automobile wheel arch forming

Abstract

The application relates to a design method of an injection molding structure for double-color automobile wheel eyebrow forming, which comprises a male die plate, an oil cylinder and a driving sliding block, a first gate is arranged on the upper end surface of the male die plate, the oil cylinder is installed on the right side of the male die plate, the main shaft of the oil cylinder faces left, the driving sliding block is installed on the main shaft of the oil cylinder and inserted into the male die plate, the right end upper side of the driving sliding block adopts an inclined surface structure with the left end inclined downward, a gate sliding block moving up and down is installed on the inclined surface structure, a forming part is formed between the upper end of the gate sliding block and the first gate, a gate insert embedded into the male die plate is installed on the upper side of the driving sliding block, a horn gate nozzle is embeddedly installed on the upper end surface of the gate insert close to the first gate, and the horn gate nozzle is provided with a second gate corresponding to the forming part. The application has the characteristics of reducing the cost of double-color injection molding, improving product production efficiency, guaranteeing product quality, facilitating product ejection and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of double-color injection molding, in particular to a design method of an injection molding structure for double-color automobile wheel arch forming. BACKGROUND

[0002] As shown in Figure 5 and Figure 6 , the conventional double-color injection molding process needs two molds to form during production, the first mold and the second mold have the same female mold, the male mold of the first mold only has the glue position of the first shot product, the male mold of the second mold increases the glue position of the second shot part compared with the male mold of the first mold, after the first shot is completed by the first mold, the female mold after the first shot is rotated by the injection molding machine, the female mold after the first shot is combined with the male mold of the second shot to perform the second shot forming, this production process greatly increases the production cost, in order to reduce the production cost of double-color injection molding, the mold needs to be modified. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a design method of an injection molding structure for double-color automobile wheel arch forming, which has the characteristics of reducing the cost of double-color injection molding, improving product production efficiency, ensuring product quality, facilitating product ejection, etc.

[0004] The technical solution adopted by the present application to solve the technical problem is: a design method of an injection molding structure for double-color automobile wheel arch forming is provided, which comprises a male mold plate, an oil cylinder and a driving sliding block, a first gate is arranged on the upper end face of the male mold plate, an oil cylinder is installed on the right side of the male mold plate, the main shaft of the oil cylinder faces left, a driving sliding block is installed on the main shaft of the oil cylinder and inserted into the male mold plate, a left end downward inclined slope structure is arranged on the right end upper side of the driving sliding block, a gate sliding block that moves up and down is installed on the slope structure, a forming part is formed between the upper end of the gate sliding block and the first gate, a gate insert piece is installed on the upper side of the driving sliding block and embedded into the male mold plate, a horn gate nozzle is embedded and installed on the upper end face of the gate insert piece close to the first gate, and a second gate corresponding to the forming part is arranged on the horn gate nozzle.

[0005] In the technical solution, the oil cylinder is arranged to facilitate the oil cylinder to push the driving sliding block, the driving sliding block is arranged to control the gate sliding block to move up and down, the gate insert piece is arranged to facilitate the installation of the horn gate nozzle, the horn gate nozzle is arranged to set the second gate, and the gate sliding block is arranged to block the forming part, when the forming part moves down, the second gate can be opened, so that double-color injection molding is realized, the structure can be integrally installed on a mold, and during production, only the position of the gate sliding block needs to be switched to complete double-color injection molding, which can greatly reduce the production cost and improve the efficiency of double-color injection molding.

[0006] As a supplement to the technical solution, the nozzle body is provided with an outwardly extending extension part near the first nozzle side, and the lower side of the extension part is provided with a curved surface structure curved upward near the end.

[0007] In the technical solution, the nozzle body is convenient for quick docking with the nozzle insert, and the nozzle body is convenient for replacement.

[0008] As a supplement to the technical solution, the second nozzle includes an injection runner, a horn runner, and a communication hole, the injection runner is arranged on the nozzle body, the horn runner is arranged at the middle of the lower end surface of the extension part, and the communication hole is arranged between the injection runner and the horn runner.

[0009] In the technical solution, the injection runner is convenient for docking with the runner of the two-color injection molding nozzle, the horn runner is convenient for injection of the gel material, and the communication hole is convenient for docking of the injection runner and the horn runner.

[0010] As a supplement to the technical solution, the upper side of the gate slide block adopts a stepped structure, and the side surface of the stepped structure is curved, so that the stepped structure is convenient for limiting the gate slide block.

[0011] As a supplement to the technical solution, the male mold plate is provided with two rectangular grooves arranged side by side at the position of the first nozzle, and the rectangular grooves are convenient for forming the reinforcing ribs.

[0012] As a supplement to the technical solution, the male mold plate is provided with a limiting protrusion for clamping the oil cylinder, and the oil cylinder is provided with a stop block abutting against the oil cylinder.

[0013] A design method of an injection molding structure for two-color automobile wheel arch forming, comprising the following specific steps: step one: performing CAE analysis on the product to be produced, determining the positions, number, length, and nozzle diameter of the first nozzle and the second nozzle according to the analysis report; step two: determining the runner structure on the mold hot runner plate according to the positions of the first nozzle and the second nozzle; step three: designing the nozzle insert according to the length and nozzle diameter of the second nozzle; and step four: determining the size and shape of the gate slide block according to the shape of the nozzle insert.

[0014] As a supplement to the technical solution, the second nozzle is in the shape of a horn, the length of the nozzle of the second nozzle is not more than 100 mm, and the nozzle diameter is between 0.8 and 1 mm.

[0015] As a supplement to this technical solution, the gate slider is designed with a stepped structure, and the upper end of the gate slider is provided with a forming part. The shape and thickness of the forming part match the second gate. The length of the forming part does not exceed 3.5 times the thickness of the forming part, and the thickness of the stepped part is 10-20mm.

[0016] Beneficial Effects: This invention relates to a design method for an injection molding structure used in two-color automotive wheel arch molding. A hydraulic cylinder is incorporated to facilitate the driving of a slide block, which in turn controls the up-and-down movement of a gate slide block. A sprue insert is provided to facilitate the installation of a horn-shaped sprue insert, which is used to set the second sprue. The gate slide block seals the molding section. When the molding section moves downward, the second sprue opens, thus achieving two-color injection molding. This structure can be installed as a whole on a mold. During production, only the position of the gate slide block needs to be switched to complete the two-color injection molding. This method significantly reduces production costs and improves the efficiency of two-color injection molding, offering advantages such as reduced cost, increased production efficiency, guaranteed product quality, and convenient product ejection. Attached Figure Description

[0017] Figure 1 This is a structural view of the present invention;

[0018] Figure 2 This is a top view of the horn-shaped gate insert described in this invention;

[0019] Figure 3 This is a bottom view of the horn-shaped gate insert described in this invention;

[0020] Figure 4 This is a structural view of the present invention with a first gate and a second gate;

[0021] Figure 5 This is a simplified diagram of the mold design before the improvement of this invention;

[0022] Figure 6 This is the present invention. Figure 5 Enlarged view of a portion of point A in the middle;

[0023] Figure 7 This is a top view of the structure of the present invention;

[0024] Figure 8 This is the present invention. Figure 7 Sectional view along the AA direction;

[0025] Figure 9 This is a schematic diagram of the product of the present invention;

[0026] Figure 10 This is a sectional view along the BB direction as described in this invention.

[0027] Fig. 1, a male template, 2, an oil cylinder, 3, a driving slider, 4, a guillotine slider, 5, a forming part, 6, a rectangular groove, 7, a first gate, 8, a second gate, 9, a horn gate insert, 10, a limiting convex rib, 11, a stop block, 12, an insert body, 13, an extension, 14, a communication hole, 15, a horn runner, 16, an injection runner, 17, a gate insert, 18, a primary injection body, 19, a secondary injection body. DETAILED DESCRIPTION

[0028] The application will be further described below in connection with specific embodiments. It should be understood that these embodiments are only used to illustrate the application and not used to limit the scope of the application. Furthermore, it should be understood that after reading the content of the application, those skilled in the art can make various modifications or changes to the application, and these equivalent forms also fall within the scope of the appended claims.

[0029] The embodiment of the application relates to a design method of an injection molding structure for double-color automobile wheel arch forming, as shown in Fig. 1, which comprises a male template 1, an oil cylinder 2 and a driving slider 3. Figure 1 As shown in Fig. 1, the upper end face of the male template 1 is provided with a first gate 7, the right side of the male template 1 is provided with the oil cylinder 2, the main shaft of the oil cylinder 2 is towards left, the main shaft of the oil cylinder 2 is provided with the driving slider 3 which is inserted into the male template 1, the right end upper side of the driving slider 3 is provided with a left end downwards inclined surface structure, the inclined surface structure is provided with a guillotine slider 4 which moves up and down, the guillotine slider 4 is provided with a forming part 5 which is formed between the upper end of the guillotine slider 4 and the first gate 7, the upper end face of a gate insert 17 which is embedded into the male template 1 is provided with a horn gate insert 9 which is embedded and installed near the first gate 7, and the horn gate insert 9 is provided with a second gate 8 which corresponds to the forming part 5.

[0030] In the technical solution, the oil cylinder 2 is used to facilitate the oil cylinder to push the driving slider 3, the driving slider 3 is used to control the guillotine slider 4 to move up and down, the gate insert 17 is used to facilitate the installation of the horn gate insert 9, the horn gate insert 9 is used to set the second gate 8, and the guillotine slider 4 is used to block the forming part 5, when the forming part 5 moves down, the second gate 8 can be opened, so that double-color injection molding is realized, the structure can be integrally installed on a mold, and when producing, the position of the guillotine slider 4 is only needed to be switched, so that double-color injection molding can be completed, and in this way, the production cost can be greatly reduced, and the efficiency of double-color injection molding is improved.

[0031] As a supplement to the technical solution, the nozzle body 12 is provided with the outwardly extending extension 13 on the side close to the first nozzle 7, and the lower side of the extension 13 is provided with a curved surface structure curved upward close to the end.

[0032] In the technical solution, the nozzle body 12 is provided to facilitate quick docking with the nozzle insert 17, and the nozzle body 12 is also convenient to replace. The extension 13 is provided to facilitate docking with the first nozzle 7.

[0033] As a supplement to the technical solution, the second nozzle 8 includes an injection runner 16, a horn runner 15, and a communication hole 14. The injection runner 16 is arranged on the nozzle body 12, the horn runner 15 is arranged on the middle part of the lower end surface of the extension 13, and the communication hole 14 is arranged between the injection runner 16 and the horn runner 15.

[0034] In the technical solution, the injection runner 16 is arranged to facilitate docking with the nozzle runner of the two-color injection molding. The horn runner 15 is arranged to facilitate the injection of colloidal material. The communication hole 14 is arranged to facilitate the docking of the injection runner 16 and the horn runner 15.

[0035] As a supplement to the technical solution, the upper side of the gate slide block 4 adopts a stepped structure, and the side surface of the stepped structure is curved. The stepped structure is arranged to facilitate the limiting of the gate slide block 4.

[0036] As a supplement to the technical solution, the male mold plate 1 is provided with two rectangular grooves 6 arranged side by side at the position of the first nozzle 7. The rectangular grooves 6 are arranged to facilitate the formation of the reinforcing ribs.

[0037] As a supplement to the technical solution, the male mold plate 1 is provided with a limiting protruding rib 10 clamped into the oil cylinder 2. The oil cylinder 2 is provided with a stop block 11 abutting against the oil cylinder 2.

[0038] A design method of an injection molding structure for two-color automobile wheel arch forming includes the following specific steps: Step one: CAE analysis is performed on the product to be produced. According to the analysis report, the positions, numbers, lengths, and nozzle diameters of the first nozzle 7 and the second nozzle 8 are determined. Step two: The runner structure on the mold hot runner plate is determined according to the positions of the first nozzle 7 and the second nozzle 8. Step three: The nozzle insert 17 is designed according to the length and nozzle diameter of the second nozzle 8. Step four: The size and shape of the gate slide block 4 are determined according to the shape of the nozzle insert 17.

[0039] As a supplement to the technical solution, the second gate 8 is in the shape of a horn, the length of the gate flow of the second gate 8 is not more than 100mm, and the diameter of the gate is between 0.8-1mm.

[0040] As a supplement to the technical solution, the gate slide 4 is designed with a step structure, the upper end of the gate slide 4 is provided with a shaped part 5, the shape and thickness of the shaped part 5 match the second gate 8, the length of the shaped part 5 is not more than 3.5 times the thickness of the shaped part 5, and the thickness of the step part is between 10-20mm.

[0041] As shown in Figure 5 and Figure 6 , the original production situation requires two mold structures, the first mold for molding the first injection body 18, and the second mold for molding the second injection body 19.

[0042] Embodiment

[0043] As shown in Figure 7 and Figure 8 , when the device is producing, first the mold is closed, then the first injection is performed, the plastic material is injected, the material is molded in the first gate 7, the product body is molded, after completion, the oil cylinder 2 is started, the spindle of the oil cylinder 2 is retracted, so that the oil cylinder 2 can drive the drive slide 3 to move, the drive slide 3 makes the gate slide 4 move down, exposing the shaped part 5, then the second injection structure is started, so that the gel material enters the injection channel 16 through the second flow channel structure, the gel material in the injection channel 16 flows into the horn flow channel 15 through the communication hole 14, and enters the shaped part 5 through the horn flow channel 15, the shaped part 5 can be attached to the product body, completing the second molding, the produced product is shown in Figure 9 and Figure 10 .

[0044] The above describes in detail the design method of the injection structure for double-color automobile wheel arch molding provided by the present application, the principles and implementation methods of the present application are described in this paper, the above description of the embodiments is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A method for designing an injection molding structure for two-color automotive wheel arch molding, characterized in that: The system includes a male template (1), a hydraulic cylinder (2), and a drive slider (3). A first gate (7) is provided on the upper surface of the male template (1). A hydraulic cylinder (2) is installed on the right side of the male template (1). The main shaft of the hydraulic cylinder (2) faces left. A drive slider (3) that inserts into the male template (1) is installed on the main shaft of the hydraulic cylinder (2). The upper right side of the drive slider (3) adopts a slope structure with the left end facing down. A gate slider (4) that moves up and down is installed on the slope structure. A molding part (5) is formed between the upper end of the gate slider (4) and the first gate (7). A gate insert (17) that is embedded in the male template (1) is installed on the upper side of the drive slider (3). A horn gate insert (9) is embedded on the upper surface of the gate insert (17) near the first gate (7). A second gate (8) corresponding to the molding part (5) is provided on the horn gate insert (9). The specific steps include the following: Step 1: Perform CAE analysis on the product to be produced. Based on the analysis report, determine the location, quantity, length, and gate diameter of the first gate (7) and the second gate (8). Step 2: Determine the runner structure on the hot runner plate of the mold based on the positions of the first gate (7) and the second gate (8); Step 3: Design the gate insert (17) according to the length and diameter of the second gate (8); Step 4: Determine the size and shape of the gate slider (4) based on the shape of the gate insert (17).

2. The method of designing an injection molded structure for two-color automotive wheel arch molding according to claim 1, wherein: The horn-shaped gate insert (9) includes an insert body (12) and an extension (13). The insert body (12) has an extension (13) extending outward on the side near the first gate (7). The extension (13) has a curved surface structure with one end curving upward near the end on its lower side.

3. The method of designing an injection molding structure for two-color automobile wheel trim forming according to claim 2, characterized in that: The second gate (8) includes an injection channel (16), a horn-shaped channel (15), and a connecting hole (14). The injection channel (16) is disposed on the insert body (12). The horn-shaped channel (15) is disposed in the middle of the lower end face of the protrusion (13). A connecting hole (14) is disposed between the injection channel (16) and the horn-shaped channel (15).

4. The method of designing an injection molding structure for two-color automobile wheel trim forming according to claim 1, wherein: The upper side of the gate slider (4) adopts a stepped structure, and the side of the stepped structure is curved.

5. The method of designing an injection molded structure for two-color automotive wheel arch molding according to claim 1, wherein: The public template (1) has two rectangular grooves (6) arranged side by side at the position where the first gate (7) is set.

6. The method of designing an injection molded structure for two-color automotive wheel arch molding according to claim 1, wherein: The template (1) is provided with a limiting rib (10) that can be inserted into the oil cylinder (2), and a stop block (11) that abuts against the oil cylinder (2) is provided on the left side of the oil cylinder (2).

7. The method of designing an injection molded structure for two-color automotive wheel arch molding according to claim 1, wherein: The second gate (8) has a horn-shaped structure, and the gate length of the second gate (8) does not exceed 100 mm, and the gate diameter is between 0.8 and 1 mm.

8. The method of designing an injection molded structure for two-color automotive wheel arch molding according to claim 1, wherein: The gate slider (4) is designed with a stepped structure. The upper end of the gate slider (4) is provided with a forming part (5). The shape and thickness of the forming part (5) match the second gate (8). The length of the forming part (5) does not exceed 3.5 times the thickness of the forming part (5). The thickness of the stepped part is 10-20mm.

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