Injection mold for automobile intake manifold

Abstract

The injection mold comprises a first core pulling rod (1), a first sliding block (2), a second sliding block (3) and a third sliding block (4), the first core pulling rod (1) is used for forming an inner channel of a first connecting air pipe (101), and the second sliding block (3) and the third sliding block (4) are arranged in a bilateral symmetry mode and used for forming a circle of first positioning groove (105). The device further comprises a second core-pulling rod (5) used for forming an inner channel of a second connecting air pipe (102), a third core-pulling rod (6) used for forming a third connecting air pipe (103), a sixth sliding block (9) and a seventh sliding block (10) which are used for forming a circle of second positioning groove (106), and a third core-pulling rod (11) and a tenth sliding block (12) which are used for forming an inner channel of a third connecting air pipe (104). According to the mold, a multi-directional and multi-angle mold closing and step-by-step demolding mode is adopted to mold a pipeline and a plurality of positioning grooves in the outer walls of the pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and more specifically, to an injection mold for an automotive intake manifold. Background Art

[0002] The intake manifold is an essential component for air to enter an automotive engine and plays a crucial role in the movement of the engine piston cylinders. When the engine is in the intake stroke, the piston moves downward, creating a vacuum in the cylinder. As the air pressure decreases, a pressure difference is generated with the outside air, allowing air to enter the cylinder. Due to the relatively low temperature at the intake end, composite materials have become a popular material for intake manifolds. They are lightweight and have a smooth interior, which can effectively reduce resistance and increase the intake efficiency. The demand for compact multi-branch intake manifolds is increasing, especially for structures that integrate multi-angle and differently oriented connecting pipes within a limited space, posing new challenges to mold design. As Figure 1 and Figure 2 shown, a conventional intake manifold includes a body, and has a first connecting pipe 101, a second connecting pipe 102, a third connecting pipe 103, and a fourth connecting pipe 104 extending in different directions outward from the body. The outer surface of the port of the first connecting pipe 101 is provided with a plurality of annular first positioning grooves 105 in a circle, and the outer surface of the port of the second connecting pipe 102 is provided with a plurality of annular second positioning grooves 106 in a circle. The mold design for this type of intake manifold structure is extremely difficult because although the first connecting pipe 101, the second connecting pipe 102, and the third connecting pipe 103 face the same direction, each has a different angle and the spacing between them is relatively small. Therefore, there are significant spatial constraints for the core pulling of the pipes and the core pulling of the positioning grooves on the outer sidewalls. Thus, how to achieve the one-time molding of a multi-angle compact intake manifold while ensuring structural strength and accurately forming the circumferential positioning groove features has become a technical bottleneck that urgently needs to be broken through in this field. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an injection mold for an automotive intake manifold that uses a multi-directional and multi-angle mold closing and step-by-step demolding method to form the pipes and the positioning grooves on the outer walls of multiple pipes. The mold has a compact structure, a reasonable layout, increases the accuracy of the molded product, effectively reduces costs, and the integrated structure also ensures the stable and reliable performance of the product, extends its service life, and reduces the risk of welding cost and weld bottom-temperature cracking and deformation.

[0004] The technical solution of the present invention is to provide an injection mold for an automotive intake manifold having the following structure, including a first core-pulling rod, a first slider, a second slider, and a third slider for forming the inner channel of the first connecting air pipe. The first core-pulling rod is used for forming the first connecting air pipe and its tail end is fixed to the first slider. The second slider and the third slider are symmetrically arranged left and right and are used for forming a circle of first positioning grooves. The front ends of the second slider and the third slider are each provided with a plurality of first positioning blocks, and a first cavity for forming a circle of first positioning grooves is formed after the mold is closed. The second slider and the third slider move downward synchronously in the closed mold state or move in the opposite direction synchronously in the open mold state. It also includes a second core-pulling rod for forming the inner channel of the second connecting air pipe, a third core-pulling rod for forming the third connecting air pipe, a fourth slider, and a fifth slider. The tail ends of the second core-pulling rods are fixed to the fourth slider, and the tail ends of the third core-pulling rods are fixed to the fifth slider. The second core-pulling rod and the third core-pulling rod are located on the same side. During demolding, the fourth slider separates following the movement of the fixed mold. The second core-pulling rod first separates from the formed second connecting air pipe, and the third core-pulling rod then separates from the formed third connecting air pipe. The fifth slider is driven to separate by a power mechanism. It also includes a sixth slider and a seventh slider for forming a circle of second positioning grooves. The sixth slider and the seventh slider are symmetrically arranged left and right, and the front ends of each are provided with a plurality of second positioning blocks. A second cavity for forming a circle of second positioning grooves is formed after the mold is closed. The sixth slider and the seventh slider move downward synchronously in the closed mold state or move in the opposite direction synchronously in the open mold state. It also includes a third core-pulling rod for forming the inner channel of the third connecting air pipe and a tenth slider. The tail end of the third core-pulling rod is fixed to the tenth slider.

[0005] The fourth slider is installed on the eighth slider, the fifth slider is installed on the ninth slider. A through hole is provided at the center of the ninth slider. A first positioning block is provided in the through hole. The first positioning block is provided with a first sliding groove. The included angle between the first sliding groove and the surface of the eighth slider is α. The axis of the third core-pulling rod is parallel to the surface of the eighth slider. The bottom of the eighth slider is slidably connected to the first sliding groove. An inclined guide post is provided in the eighth slider. The included angle between the inclined guide post and the surface of the eighth slider is β. The second core-pulling rod is arranged parallel to the first sliding groove. A connecting seat is connected to the bottom of the ninth slider. The power mechanism is fixed to the connecting seat. The driving end of the power mechanism is fixed to the ninth slider.

[0006] In the mold-closed state, the bottom of the eighth slider is embedded in the through hole of the ninth slider, the second core-pulling rod is located in the formed second connecting air pipe, and the third core-pulling rod is located in the formed third connecting air pipe; in the first step of demolding, the inclined guide post drives the eighth slider upward. Restricted by the guide of the first chute at the bottom, the eighth slider moves along the inclined direction of the first chute, so that the third core-pulling rod is pulled out. At this time, the second core-pulling rod is not demolded. At the same time, the eighth slider moves above the ninth slider and is at a certain distance apart; in the second step of demolding, the power mechanism on the ninth slider is activated and pushes the ninth slider. The moving direction of the power end of the power mechanism, the moving direction of the ninth slider, and the moving direction of the second core-pulling rod are parallel and consistent, so that the second core-pulling rod is pulled out to complete the demolding.

[0007] A limiting block is provided at the bottom of the eighth slider, and a blocking block is provided on the connecting seat. When the eighth slider follows the drive of the inclined guide post, the limiting block at the bottom abuts against the blocking block of the connecting seat to achieve limiting, so that the eighth slider stops at this position. In the second step of demolding, when the power mechanism pushes the ninth slider, the blocking block is separated from the limiting block.

[0008] The first positioning block at the front end of the second slider is provided with a first arc-shaped notch, and the first positioning block at the front end of the third slider is provided with a second arc-shaped notch. After mold closing, the first cavity that forms a circle of first positioning grooves means that the first arc-shaped notch and the second arc-shaped notch form the first cavity that forms a circle of first positioning grooves. This first cavity is provided with a step, and the step of this first cavity also axially limits the middle section of the first slider.

[0009] The power mechanism includes an oil cylinder, a base, and a driving block; the base is located below the connecting seat. The base is provided with a linear chute. The bottom of the driving block is slidably connected in the chute and fixed to the front end of the piston rod of the oil cylinder. The top of the driving block is fixed to the connecting seat. When the piston rod of the oil cylinder extends, it pushes the driving block to move away from the formed automotive intake manifold, and at the same time drives the connecting seat.

[0010] After adopting the above structure, the present invention has the following advantages: 1. The multi-directional and multi-angle mold closing and step-by-step demolding methods are adopted to form the pipe and the positioning grooves on the outer walls of multiple pipes. The mold structure is compact and the layout is reasonable, ensuring that there is no interference and influence during demolding. 2. The second slider and the third slider are symmetrically arranged left and right and are used to form a circle of first positioning grooves. A plurality of first positioning blocks are provided at the front ends of the second slider and the third slider. After mold closing, a first cavity for forming a circle of first positioning grooves is formed. This first cavity does not form the outer wall of the pipe fitting, and can also play a role in locking and positioning after mold closing. 3. When forming the second connecting air pipe and the third connecting air pipe, it also includes a second core-pulling rod for forming the inner channel of the second connecting air pipe, a third core-pulling rod for forming the third connecting air pipe, a fourth slider and a fifth slider. The tail ends of the second core-pulling rods are all fixed on the fourth slider, and the tail ends of the third core-pulling rods are all fixed on the fifth slider; the second core-pulling rod and the third core-pulling rod are located on the same side. During demolding, the fourth slider follows the fixed mold to move and separate, and the fifth slider is driven by a power mechanism to separate; the second core-pulling rod and the third core-pulling rod with an inclined angle and not in the same plane are demolded by two groups, and the two are respectively demolded by different drives, making the structure compact and the demolding efficiency high. 4. The precision of the formed product is increased, the cost is effectively reduced, the integrated structure also ensures the stable and reliable performance of the product, extends the service life, reduces the welding cost and the risk of low-temperature cracking and deformation of the weld seam. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 6 is a schematic structural view of the first perspective of the automotive intake manifold of the present invention.

[0012] Figure 2 FIG. 10 is a schematic structural view of the second perspective of the automotive intake manifold of the present invention.

[0013] Figure 3 FIG. 14 is a split view of the injection mold for an automotive intake manifold of the present invention.

[0014] Figure 4 FIG. 18 is a three-dimensional view of the injection mold for an automotive intake manifold of the present invention.

[0015] Figure 5 FIG. 22 is a demolding view of the second slider and the third slider of the present invention.

[0016] Figure 6 FIG. 26 is a mold closing view of the second slider and the third slider of the present invention.

[0017] Figure 7 FIG. 30 is a demolding view of the fourth slider and the fifth slider of the present invention.

[0018] Figure 8Schematic diagram of mold closing of the fourth slider and the fifth slider of the present invention.

[0019] Figure 9 Schematic diagram of the first step of demolding of the fourth slider and the fifth slider of the present invention.

[0020] Figure 10 Schematic diagram of the second step of demolding of the fourth slider and the fifth slider of the present invention.

[0021] Figure 11 Schematic diagram of demolding of the sixth slider and the seventh slider of the present invention.

[0022] Figure 12 Schematic diagram of mold closing of the sixth slider and the seventh slider of the present invention Figure 13 Schematic diagram of demolding of the seventh slider and the third core-pulling rod of the present invention.

[0023] Figure 14 Schematic diagram of mold closing of the seventh slider and the third core-pulling rod of the present invention.

[0024] Figure 15 Schematic diagram of installation of the power mechanism of the present invention.

[0026] As shown in the figure:

[0027] 1. First core-pulling rod, 2. First slider, 3. Second slider, 4. Third slider, 5. Second core-pulling, 6. Third core-pulling rod, 7. Fourth slider, 8. Fifth slider, 9. Sixth slider, 10. Seventh slider, 11. Third core-pulling rod, 12. Tenth slider, 13. Eighth slider, 14. Ninth slider, 15. Through hole, 16. First positioning block, 17. First chute, 18. Oblique guide post, 19. First arc-shaped notch, 20. Second arc-shaped notch, 21. Oil cylinder, 22. Base, 23. Driving block, 24. Oblique guide post. Detailed implementation manners

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] As Figure 1 and Figure 2 shown, the automotive intake manifold of the present invention includes a body, and there are a first connecting air pipe 101, a second connecting air pipe 102, a third connecting air pipe 103 and a fourth connecting air pipe 104 in different outward directions of the body. A plurality of annular first positioning grooves 105 are provided on the outer appearance of the port of the first connecting air pipe 101, and a plurality of annular second positioning grooves 106 are provided on the outer appearance of the port of the second connecting air pipe 102.

[0030] As Figures 3 - 14As shown in the figure, an injection mold for an automotive intake manifold according to the present invention includes a first core-pulling rod 1, a first slider 2, a second slider 3, and a third slider 4 for forming the inner channel of the first connecting air pipe 101.

[0031] As Figure 5 and Figure 6 shown, the first core-pulling rod 1 is used for forming the first connecting air pipe 101 and its tail end is fixed to the first slider 2. The second slider 3 and the third slider 4 are symmetrically arranged left and right and are used for forming a circle of first positioning grooves 105. A plurality of first positioning blocks are provided at the front ends of the second slider 3 and the third slider 4. After the mold is closed, a first cavity for forming a circle of first positioning grooves 105 is formed. The second slider 3 and the third slider 4 move downward synchronously in the closed mold state or move in the opposite direction synchronously in the open mold state. The first positioning block at the front end of the second slider 3 is provided with a first arc-shaped notch 19, and the first positioning block at the front end of the third slider 4 is provided with a second arc-shaped notch 20. After the mold is closed, the first cavity for forming a circle of first positioning grooves 105 means that the first arc-shaped notch 19 and the second arc-shaped notch 20 form the first cavity for forming a circle of first positioning grooves 105. This first cavity is provided with a step, and the step of this first cavity also axially limits the middle section of the first slider 2.

[0032] As Figure 7 , Figure 8 , Figure 9 and Figure 10 shown, an injection mold for an automotive intake manifold according to the present invention further includes a second core-pulling rod 5 for forming the inner channel of the second connecting air pipe 102, a third core-pulling rod 6 for forming the third connecting air pipe 103, a fourth slider 7, and a fifth slider 8. The tail ends of the second core-pulling rod 5 are all fixed to the fourth slider 7, and the tail ends of the third core-pulling rod 6 are all fixed to the fifth slider 8. The second core-pulling rod 5 and the third core-pulling rod 6 are located on the same side. During demolding, the fourth slider 7 follows the fixed mold and moves away. The second core-pulling rod 5 first separates from the formed second connecting air pipe 102, and the third core-pulling rod 6 then separates from the formed third connecting air pipe 103. The fifth slider 8 is driven to separate by a power mechanism.

[0033] The fourth slider is mounted on the eighth slider 13, the fifth slider 8 is mounted on the ninth slider 14. A through hole 15 is provided at the center of the ninth slider 14. A first positioning block 16 is provided in the through hole 15. The first positioning block 16 is provided with a first chute 17. The included angle between the first chute 17 and the surface of the eighth slider 13 is α. The axis of the third core-pulling rod 6 is parallel to the surface of the eighth slider 13. The bottom of the eighth slider 13 is slidably connected to the first chute 17. An inclined guide post 24 is provided in the eighth slider 13. The included angle between the inclined guide post 24 and the surface of the eighth slider 13 is β. The second core-pulling rod 5 is arranged parallel to the first chute 17. A connecting seat 18 is connected to the bottom of the ninth slider 14. The power mechanism is fixed on the connecting seat 18. The driving end of the power mechanism is fixed to the ninth slider 14. As Figure 15 shown, the power mechanism is an oil cylinder 21, a base 22 and a driving block 23. The base 22 is located below the connecting seat 18. The base 22 is provided with a linear chute. The bottom of the driving block 23 is slidably connected in the chute and fixed to the front end of the piston rod of the oil cylinder 21. The top of the driving block 23 is fixed to the connecting seat 18. When the piston rod of the oil cylinder 21 extends, it pushes the driving block 23 to move away from the formed automotive intake manifold, and at the same time drives the connecting seat 18.

[0034] In the mold closing state, as Figure 8 shown, the bottom of the eighth slider 13 is embedded in the through hole 15 of the ninth slider 14. The second core-pulling rod 5 is located in the formed second connecting air pipe 102. The third core-pulling rod 6 is located in the formed third connecting air pipe 103. A limiting block is provided at the bottom of the eighth slider 13. A stop block is provided on the connecting seat 18. When the eighth slider 13 is driven by the inclined guide post 24, the limiting block at the bottom abuts against the stop block on the connecting seat 18 to achieve limiting, so that the eighth slider 13 stops at this position. In the second step of demolding, when the power mechanism pushes the ninth slider 14, the stop block and the limiting block are separated.

[0035] In the first step of demolding, as Figure 9 shown, the inclined guide post 24 drives the eighth slider 13 to slide upward. The eighth slider 13 is restricted by the guiding of the first chute 17 at the bottom and moves along the inclined direction of the first chute 17, so that the third core-pulling rod 6 is pulled out. At this time, the second core-pulling rod 5 is not demolded. At the same time, the eighth slider 13 moves above the ninth slider 14 and is separated by a certain distance. In the second step of demolding, as Figure 10 shown, the power mechanism on the ninth slider 14 is started and pushes the ninth slider 14. The moving direction of the power end of the power mechanism, the moving direction of the ninth slider 14 and the moving direction of the second core-pulling rod 5 are parallel and consistent, so that the second core-pulling rod 5 is pulled out to complete demolding.

[0036] As Figure 11and Figure 12 As shown in Figure 12 , an injection mold for an automotive intake manifold according to the present invention further includes a sixth slider 9 and a seventh slider 10 for forming a circle of second positioning grooves 106. The sixth slider 9 and the seventh slider 10 are symmetrically arranged left and right, and a plurality of second positioning blocks are provided at the front ends. After the mold is closed, a second cavity for forming a circle of second positioning grooves 106 is formed. The sixth slider 9 and the seventh slider 10 move downward synchronously in the closed mold state or move reversely synchronously in the open mold state.

[0037] As Figure 13 and Figure 14 As shown in Figure 13 and Figure 14 , an injection mold for an automotive intake manifold according to the present invention further includes a third core-pulling rod 11 and a tenth slider 12 for forming the inner channel of the third connecting air pipe 104. The tail end of the third core-pulling rod 11 is fixed to the tenth slider 12.

Claims

1. An injection mold for an automotive intake manifold, characterized in that: It includes a first core-pulling rod (1), a first slider (2), a second slider (3) and a third slider (4) for forming the inner channel of the first connecting air pipe (101). The first core-pulling rod (1) is used for the forming of the first connecting air pipe (101) and its tail end is fixed to the first slider (2). The second slider (3) and the third slider (4) are symmetrically arranged left and right and are used for forming a circle of first positioning grooves (105). A plurality of first positioning blocks are provided at the front ends of the second slider (3) and the third slider (4). After the mold is closed, a first cavity for forming a circle of first positioning grooves (105) is formed. The second slider (3) and the third slider (4) move downward synchronously in the closed mold state or move reversely synchronously in the open mold state. It further includes a second core-pulling rod (5) for forming the inner channel of the second connecting air pipe (102), a third core-pulling rod (6) for forming the third connecting air pipe (103), a fourth slider (7) and a fifth slider (8). The tail ends of the second core-pulling rod (5) are all fixed to the fourth slider (7). The tail ends of the third core-pulling rod (6) are all fixed to the fifth slider (8). The second core-pulling rod (5) and the third core-pulling rod (6) are located on the same side. When demolding, the fourth slider (7) follows the fixed mold to move and separate. The second core-pulling rod (5) first separates from the formed second connecting air pipe (102), and the third core-pulling rod (6) then separates from the formed third connecting air pipe (103). The fifth slider (8) is driven by a power mechanism to separate. It further includes a sixth slider (9) and a seventh slider (10) for forming a circle of second positioning grooves (106). The sixth slider (9) and the seventh slider (10) are symmetrically arranged left and right, and a plurality of second positioning blocks are provided at their front ends. After the mold is closed, a second cavity for forming a circle of second positioning grooves (106) is formed. The sixth slider (9) and the seventh slider (10) move downward synchronously in the closed mold state or move reversely synchronously in the open mold state. It further includes a third core-pulling rod (11) for forming the inner channel of the third connecting air pipe (104) and a tenth slider (12). The tail end of the third core-pulling rod (11) is fixed to the tenth slider (12).

2. The injection mold for an automotive intake manifold according to claim 1, characterized in that: The fourth slider is installed on an eighth slider (13). The fifth slider (8) is installed on a ninth slider (14). A through hole (15) is provided at the center of the ninth slider (14), and a first positioning block (16) is provided in the through hole (15). The first positioning block (16) is provided with a first sliding groove (17). The included angle between the first sliding groove (17) and the surface of the eighth slider (13) is α. The axis of the third core-pulling rod (6) is parallel to the surface of the eighth slider (13). The bottom of the eighth slider (13) is slidably connected to the first sliding groove (17). An inclined guide post (24) is arranged in the eighth slider (13). The included angle between the inclined guide post (24) and the surface of the eighth slider (13) is β. The second core-pulling rod (5) is arranged parallel to the first sliding groove (17). A connecting seat (18) is connected to the bottom of the ninth slider (14). The power mechanism is fixed on the connecting seat (18). The driving end of the power mechanism is fixed to the ninth slider (14).

3. The injection mold for an automotive intake manifold according to claim 2, characterized in that: In the mold-closed state, the bottom of the eighth slider (13) is embedded in the through hole (15) of the ninth slider (14). The second core-pulling rod (5) is located in the formed second connecting air pipe (102). The third core-pulling rod (6) is located in the formed third connecting air pipe (103). In the first step of demolding, the inclined guide post (24) drives the eighth slider (13) upward. Restricted by the guiding of the first sliding groove (17) at the bottom, the eighth slider (13) moves along the inclined direction of the first sliding groove (17), so that the third core-pulling rod (6) is pulled out. At this time, the second core-pulling rod (5) is not demolded. At the same time, the eighth slider (13) moves above the ninth slider (14) and is at a certain distance apart. In the second step of demolding, the power mechanism on the ninth slider (14) is started and the ninth slider (14) is pushed. The moving direction of the power end of the power mechanism, the moving direction of the ninth slider (14), and the moving direction of the second core-pulling rod (5) are parallel and consistent, so that the second core-pulling rod (5) is pulled out to complete demolding.

4. The injection mold for an automotive intake manifold according to claim 2 or 3, characterized in that: A limiting block is provided at the bottom of the eighth slider (13). A stop block is provided on the connecting seat (18). When the eighth slider (13) is driven by the inclined guide post (24), the limiting block at the bottom abuts against the stop block on the connecting seat (18) to achieve limiting, so that the eighth slider (13) stops at this position. In the second step of demolding, when the power mechanism pushes the ninth slider (14), the stop block is separated from the limiting block.

5. The injection mold for an automotive intake manifold according to claim 1, wherein: The first positioning block at the front end of the second slider (3) is provided with a first arc-shaped notch (19). The first positioning block at the front end of the third slider (4) is provided with a second arc-shaped notch (20). After mold closing, the first cavity that forms a formed first positioning groove (105) in a circle means that the first arc-shaped notch (19) and the second arc-shaped notch (20) form the first cavity of the formed first positioning groove (105) in a circle. This first cavity is provided with a step, and the step of this first cavity also axially limits the middle section of the first slider (2).

6. The injection mold for an automotive intake manifold according to claim 2 or 3, characterized in that: The power mechanism is an oil cylinder (21), a base (22) and a driving block (23); the base (22) is located below the connecting seat (18), the base (22) is provided with a linear chute, the bottom of the driving block (23) is slidably connected in the chute and fixed to the front end of the piston rod of the oil cylinder (21), the top of the driving block (23) is fixed to the connecting seat (18), when the piston rod of the oil cylinder (21) extends, it pushes the driving block (23) to move away from the formed automotive intake manifold, and at the same time drives the connecting seat (18).

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