Fuel tank blow molding process and blow molding equipment

Abstract

The present invention relates to the technical field of fuel tank blow molding, and proposes a fuel tank blow molding process and blow molding equipment, which include the following steps: S1, blow molding preparation: installing embedded parts on the mold; S2, preforming: injecting a preform into the mold and filling the mold with high-pressure gas, and the preform and the embedded parts are fused and pre-embedded; S3, baffle valve installation: installing the baffle valve on the inner wall of the preform after molding; S4, cooling molding: passing a cooling medium into the mold to accelerate the hardening molding of the preform; S5, hole drilling: punching a hole in the preform between the baffle valve and the embedded parts. Through the above technical solution, the problem of fuel leakage easily occurring in the traditional ICV structural connection method in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fuel tank blow molding, and in particular to a fuel tank blow molding process and blow molding equipment. Background Art

[0002] Fuel tank blow molding is a technology for manufacturing fuel tanks, which are usually used as fuel storage containers for cars, motorcycles and other motor vehicles. Fuel tanks produced by blow molding are lightweight, corrosion-resistant, impact-resistant, and have better safety performance. In order to facilitate the injection of fuel into the fuel tank, the ICV structure needs to be installed after the fuel tank is injection molded. The ICV is an auxiliary device that connects the refueling pipe and the fuel tank. Part of the ICV structure is located inside the fuel tank and part is located outside the fuel tank. In order to install the ICV structure on the fuel tank, it is necessary to drill holes in the shell of the fuel tank, and then connect the ICV structure and the fuel tank together by welding. The sealing of the connection part is achieved by welding. The quality of the sealing performance depends on the quality of the welding, and fuel leakage is prone to occur. Summary of the invention

[0003] The present invention provides a fuel tank blow molding process and blow molding equipment, which solves the problem that the traditional ICV structural connection method in the related art is prone to fuel leakage.

[0004] The technical solution of the present invention is as follows:

[0005] A fuel tank blow molding process is used to install a split ICV on a fuel tank, wherein the ICV includes an embedded part and a flapper valve, and includes the following steps:

[0006] S1, blow molding preparation: installing the embedded parts on the mold;

[0007] S2, preforming: injecting a preform into the mold and filling the mold with high-pressure gas, so that the preform and the embedded parts are fused and embedded;

[0008] S3, installing the flapper valve: installing the flapper valve on the inner wall of the formed blank;

[0009] S4, cooling and molding: introducing a cooling medium into the mold to accelerate the hardening and molding of the parison;

[0010] S5, drilling: drilling holes in the blank between the baffle valve and the embedded part.

[0011] Optionally, in step S1, the mold includes a first mold, a second mold and an intermediate mold, and the embedded part is arranged on the first mold.

[0012] Optionally, in step S2, the first mold and the intermediate mold form a first molding cavity, the second mold and the intermediate mold form a second molding cavity, and one end of the embedded part extends into the first molding cavity.

[0013] The length of the embedded part penetrating into the first forming cavity is less than half of the wall thickness of the fuel tank.

[0014] Optionally, in step S3, the baffle valve is extended from the intermediate mold and installed on the blank. After installation, the baffle valve is concentrically arranged with the embedded part. After installation, the intermediate mold withdraws from between the first mold and the second mold, and the first mold and the second mold are molded together.

[0015] A fuel tank blow molding device, using a fuel tank blow molding process, includes the mold, and also includes:

[0016] A support frame, the support frame is arranged on one side of the mold;

[0017] A mechanical arm is lifted and lowered on the support frame, and a clamp is provided at the end of the mechanical arm for grabbing the baffle valve.

[0018] Optionally, the intermediate mold has an inner cavity, and a side wall of the inner cavity close to the first mold has a through hole, and the through hole is used for passing the baffle valve, and further includes:

[0019] A lifting seat, the lifting seat is lifted and lowered in the inner cavity;

[0020] A movable seat, the movable seat is slidably disposed in the lifting seat, and the movable seat has a supporting portion;

[0021] The baffle is arranged on the supporting part, and after the movable seat drives the baffle to move, the baffle opens or closes the through hole.

[0022] Optionally, the mechanical arm has a push rod on one side close to the moving seat, and the moving seat has a guide groove on the upper side. After the mechanical arm moves close to the moving seat, one end of the push rod goes deep into the guide groove, and further includes:

[0023] A guide seat, the guide seat is arranged in the inner cavity, the guide seat has a protrusion, and the protrusion is located at the same height as the through hole;

[0024] A first elastic member, two ends of which are respectively arranged on the lifting seat and the bottom of the inner cavity;

[0025] A second elastic member, two ends of which are respectively arranged on the moving seat and the lifting seat, and the second elastic member is used to provide a force for the moving seat to approach the guide seat.

[0026] Optionally, the first mold has an installation cavity, the installation cavity is used to install the embedded part, and further includes:

[0027] A first positioning hole, the first positioning hole is formed on the first mold, and the first positioning hole is connected to and concentric with the mounting cavity;

[0028] A sealing plate, the sealing plate being detachably arranged at one end of the first positioning hole;

[0029] A positioning column is arranged at one end of the sealing plate close to the embedded component, and the outer wall of the positioning column abuts against the inner wall of the embedded component.

[0030] Optionally, it also includes:

[0031] The first mold comprises a first module, a second module and a third module. The second module and the third module are respectively located on both sides of the first module, and the installation cavity is located in the second module.

[0032] The working principle and beneficial effects of the present invention are:

[0033] In the present invention, in order to solve the problem that the traditional ICV structural connection method in the related art is prone to fuel leakage, a split ICV is selected. Before the fuel tank is blow-molded, the embedded parts are first installed on the mold, and then the mold can be injected with a preform and filled with high-pressure gas, so that the fuel tank is first fused with the embedded parts during the preforming process. During the preforming process, the preform can tightly wrap the connection part of the embedded parts, and then the flapper valve can be installed on the inner wall of the preform. Since the preform is still in a high temperature state and has not been fully formed, the flapper valve can be installed on the inner wall of the preform without additional heating. Since the preform can also wrap one end of the flapper valve, compared with traditional welding molding, the connection of the entire ICV is more reliable and has better sealing, reducing the risk of oil leakage during the use of the fuel tank. After the flapper valve is installed, the preform can be opened after cooling and shaping, so that the embedded parts and the flapper valve are connected, and the blow molding of the entire fuel tank is completed after demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0035] Figure 1 It is a schematic diagram of the installation structure of the embedded part and the first mold of the present invention;

[0036] Figure 2 This is a schematic diagram of the preformed structure of the present invention;

[0037] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0038] Figure 4 This is a schematic diagram of the installation structure of the baffle valve of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the fuel tank before drilling of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the fuel tank after molding of the present invention;

[0041] Figure 7 It is a schematic diagram of the structure of the intermediate mold and the mechanical arm of the present invention;

[0042] Figure 8 It is a schematic diagram of the internal structure of the intermediate mold of the present invention.

[0043] In the figure: 1. fuel tank, 2. embedded parts, 3. baffle valve, 4. mold, 401. first mold, 402. second mold, 403. intermediate mold, 4011. first molding cavity, 4021. second molding cavity, 5. support frame, 6. mechanical arm, 601. clamping claw, 7. positioning column, 4031. inner cavity, 4032. through hole, 8. lifting seat, 9. moving seat, 10. baffle, 602. push rod, 901. guide groove, 11. guide seat, 1101. protrusion, 12. first elastic member, 13. second elastic member, 4012. installation cavity, 4013. first positioning hole, 14. sealing plate, 4014. first module, 4015. second module, 4016. third module. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0045] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0046] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] Reference Figure 1~Figure 5 , which is the first embodiment of the present invention, proposes a fuel tank blow molding process for installing a split ICV on a fuel tank 1, the ICV comprising an embedded part 2 and a flapper valve 3, comprising the following steps:

[0049] S1, blow molding preparation: install the embedded part 2 on the mold 4;

[0050] S2, preforming: injecting the parison into the mold 4 and filling the mold 4 with high-pressure gas, the parison and the embedded part 2 are fused and embedded;

[0051] S3, installing the flapper valve 3: installing the flapper valve 3 on the inner wall of the formed blank;

[0052] S4, cooling and molding: introducing cooling medium into the mold 4 to accelerate the hardening and molding of the parison;

[0053] S5, drilling: drilling a hole in the blank between the baffle valve 3 and the embedded part 2.

[0054] In this embodiment, in order to solve the problem that the traditional ICV structural connection method in the related art is prone to fuel leakage, a split ICV is selected. Before the fuel tank is blow-molded, the embedded part 2 is first installed on the mold 4, and then the preform can be injected into the mold 4 and filled with high-pressure gas, so that the fuel tank 1 is first fused with the embedded part 2 during the preforming process. During the preforming process, the preform can tightly wrap the connection part of the embedded part 2, and then the flapper valve 3 can be installed on the inner wall of the preform. Since the preform is still in a high temperature state and has not been fully formed, the flapper valve 3 can be installed on the inner wall of the preform without additional heating. Since the preform can also wrap one end of the flapper valve 3, compared with traditional welding molding, the connection of the entire ICV is more reliable and has better sealing, reducing the risk of oil leakage in the fuel tank 1 during use. After the flapper valve 3 is installed, the preform can be opened after cooling and shaping, so that the embedded part 2 and the flapper valve 3 are connected, and the blow molding of the entire fuel tank 1 is completed after demolding.

[0055] Further, in step S1 , the mold 4 includes a first mold 401 , a second mold 402 and an intermediate mold 403 , and the embedded part 2 is arranged on the first mold 401 .

[0056] In this embodiment, in order to facilitate the installation of the embedded part 2 on the mold 4, the mold 4 is set to a split form, in which the embedded part will be installed on the first mold 401. At the same time, with the development of technology, the shape of the fuel tank 1 is developing towards an irregular trend in order to adapt to the setting of the chassis. Although blow molding can solve this problem, the cost of opening the mold for blow molding of different fuel tanks 1 is getting higher and higher. Setting the mold 4 to be composed of the first mold 401, the second mold 402 and the intermediate mold 403 can reduce the cost of opening the mold for different types of fuel tanks 1. At the same time, due to the existence of the intermediate mold 403, the installation of the flapper valve 3 is also more convenient after preforming.

[0057] Further, in step S2 , the first mold 401 and the intermediate mold 403 form a first molding cavity 4011 , the second mold 402 and the intermediate mold 403 form a second molding cavity 4021 , and one end of the embedded part 2 extends into the first molding cavity 4011 .

[0058] In this embodiment, the fuel tank 1 is first divided into two parts during the molding process, and pre-molding is completed in the first molding cavity 4011 and the second molding cavity 4021 respectively. After the pre-molding is completed, the flapper valve 3 can be installed at the corresponding position of the parison. Since the pre-molded fuel tank 1 is a split type, it is more convenient to install the flapper valve 3, and the installation of the flapper valve 3 is avoided to affect the overall blow molding shape and blow molding quality of the fuel tank 1. Before the parison enters the first molding cavity 4011, the embedded part 2 needs to be installed on the first mold 401, and one end of the embedded part 2 needs to be deeply inserted into the first molding cavity 4011, so that the parison can be firmly covered around the embedded part 2 during the molding process, so that the connection between the embedded part 2 and the parison is tighter, the air tightness of the fuel tank 1 is improved, and the risk of oil leakage of the fuel tank 1 is reduced.

[0059] Furthermore, the length of the embedded part 2 penetrating into the first molding cavity 4011 is less than half of the wall thickness of the fuel tank 1 .

[0060] In this embodiment, in order to allow the flapper valve 3 to have sufficient installation space, thereby ensuring the stability of the connection between the entire ICV and the fuel tank 1, the length of the embedded component 2 inserted into the first molding cavity 4011 needs to be less than half the thickness of the fuel tank 1. This allows the embedded component 2 and the flapper valve 3 to form a stable connection with the parison.

[0061] Further, in step S3, the baffle valve 3 is extended from the middle mold 403 and installed on the blank. After installation, the baffle valve 3 is concentrically arranged with the embedded part 2. After installation, the middle mold 403 withdraws from between the first mold 401 and the second mold 402, and the first mold 401 and the second mold 402 are molded together.

[0062] In this embodiment, when installing the flapper valve 3, the first mold 401, the middle mold 4 and the second mold 402 are still in the position of the pre-molding, that is, the first mold 401 and the middle mold 403 and the second mold 402 and the middle mold 403 still form the first molding cavity 4011 and the second molding cavity 4021, so that the preform is in a high temperature state and will not suddenly contact the outside air and suddenly become cold and hard, thereby affecting the installation of the flapper valve 3. The flapper valve 3 is extended from the middle mold 403 and installed on the preform, and then the middle mold 403 withdraws from between the first mold 401 and the second mold 402. After the first mold 401 and the second mold 402 are completed, the final blow molding of the fuel tank 1 is completed. In order to ensure a good use effect, the flapper valve 3 and the embedded part 2 need to be concentrically arranged. In order to ensure the installation accuracy of the flapper valve 3, a mechanical arm 6 can be selected to install the flapper valve 3. By controlling the mechanical arm 6, the flapper valve 3 is installed to a preset position. After the fuel tank 1 is formed, a hole drilling operation is completed by a drilling machine so that the flapper valve 3 and the embedded part 2 are connected.

[0063] Reference Figure 1 to Figure 8, which is the second embodiment of the present invention, proposes a fuel tank blow molding equipment, which applies a fuel tank blow molding process, including a mold 4 and a support frame 5, which is arranged on one side of the mold 4; a mechanical arm 6 is lifted and arranged on the support frame 5, and a clamp 601 is provided at the end of the mechanical arm 6, and the clamp 601 is used to grab the baffle valve 3.

[0064] The present embodiment proposes a fuel tank 1 blow molding device, wherein the mold 4 is composed of a first mold 401, a second mold 402 and an intermediate mold 403. First, the embedded part 2 is installed on the first mold 401, and then the parison can be injected into the first molding cavity 4011 and the second molding cavity 4021 and filled with high-pressure gas, so that the fuel tank 1 is first fused with the embedded part 2 during the pre-molding process. During the pre-molding process, the parison can tightly wrap the connection part of the embedded part 2, and then the flapper valve 3 can be sent into the intermediate mold 403 by the mechanical arm 6 and sent into the first molding cavity 4011 by the intermediate mold 403, and the flapper valve 3 is correspondingly installed on the inner wall of the parison. Since the parison is still in a high temperature state and has not been completely formed, the flapper valve 3 can be installed on the inner wall of the parison without additional heating, and since the parison can also wrap one end of the flapper valve 3, compared with traditional welding molding, the connection of the entire ICV is more reliable and the sealing is better, reducing the risk of oil leakage during the use of the fuel tank 1. After the installation of the flapper valve 3 is completed, the fuel tank 1 can be demoulded after the parison is cooled and formed, and then enter the next process for drilling or installation of other accessories.

[0065] Furthermore, the intermediate mold 403 has an inner cavity 4031, and the side wall of the inner cavity 4031 close to the first mold 401 has a through hole 4032, and the through hole 4032 is used to pass the baffle valve 3. It also includes a lifting seat 8, which is lifted and lowered in the inner cavity 4031; a movable seat 9 is slidably arranged in the lifting seat 8, and the movable seat 9 has a supporting part; the baffle 10 is arranged in the supporting part, and after the movable seat 9 drives the baffle 10 to move, the baffle 10 opens or closes the through hole 4032.

[0066] In this embodiment, after the robot arm 6 grabs the baffle valve 3 through the clamp 601, it first sends the baffle valve 3 into the inner cavity 4031, and the lifting seat 8 and the moving seat 9 move respectively to drive the baffle 10 to move. After the baffle 10 moves, the through hole 4032 is opened, and the robot arm 6 drives the baffle valve 3 to extend from the through hole 4032 into the first molding cavity 4011, and then moves forward further to install the baffle valve 3 on the inner wall of the preform. The through hole 4032 and the baffle 10 are set, so that the blow molding of the fuel tank 1 is not affected, and it is convenient for the robot arm 6 and the clamp 601 to complete the installation of the baffle valve 3 after pre-molding. The through hole 4032 provides a moving space for the robot arm 6 to reduce the impact of the installation of the baffle valve 3 on the preform, and can also reduce the heat loss when the baffle valve 3 is installed, thereby improving the quality of the blow molding of the fuel tank 1.

[0067] Furthermore, the robot arm 6 has a pushing rod 602 on the side close to the moving seat 9, and a guide groove 901 on the upper side of the moving seat 9. After the robot arm 6 moves close to the moving seat 9, one end of the pushing rod 602 penetrates into the guide groove 901. It also includes a guide seat 11, which is arranged in the inner cavity 4031. The guide seat 11 has a protrusion 1101, and the protrusion 1101 is located at the same height as the through hole 4032. One end of the moving seat 9 abuts against the guide seat 11; the two ends of the first elastic member 12 are respectively arranged on the lifting seat 8 and the bottom of the inner cavity 4031; the two ends of the second elastic member 13 are respectively arranged on the moving seat 9 and the lifting seat 8, and the second elastic member 13 is used to provide a force for the moving seat 9 to approach the guide seat 11.

[0068] In this embodiment, after the robot arm 6 enters the inner cavity 4031, the push rod 602 abuts against the moving seat 9 and enters the guide groove 901, so that the robot arm 6 can drive the moving seat 9 and the lifting seat 8 to lower their height. After the height of the moving seat 9 is lowered, it no longer abuts against the protrusion 1101. At this time, the moving seat 9 moves toward the guide seat 11 under the action of the second elastic member 13, and the baffle 10 opens the through hole 4032, making it convenient for the robot arm 6 to install the baffle valve 3 on the parison. In the process of the robot arm 6 moving forward after being lowered to a suitable height, one end of the push rod 602 moves along the guide groove 901, always providing a downward force for the moving seat 9, and does not interfere with the moving seat 9. After the installation of the flapper valve 3 is completed, the mechanical arm 6 withdraws from the through hole 4032 and the inner cavity 4031. At this time, the lifting seat 8 is reset under the action of the first elastic member 12. As the height of the moving seat 9 increases, one end of the moving seat 9 abuts against the protrusion 1101, and the moving seat 9 slides to the side close to the through hole 4032, so that the baffle 10 seals the through hole 4032. The end of the moving seat 9 close to the guide seat 11 has a guide surface, which makes the lifting and movement of the moving seat 9 more stable and smooth.

[0069] Furthermore, the first mold 401 has an installation cavity 4012, which is used to install the embedded part 2, and also includes a first positioning hole 4013. The first positioning hole 4013 is opened on the first mold 401, and the first positioning hole 4013 is connected to the installation cavity 4012 and is concentric; the sealing plate 14 is detachably arranged at one end of the first positioning hole 4013, and the positioning column 7 is arranged at one end of the sealing plate 14 close to the embedded part 2, and the outer wall of the positioning column 7 is abutted against the inner wall of the embedded part 2.

[0070] In this embodiment, in order to ensure the accuracy of the opening and the accuracy of the ICV installation, the first mold 401 is provided with an installation cavity 4012 for installing the embedded part 2, and the first positioning hole 4013 is provided on the outside of the first mold 401 and communicates with the installation cavity 4012. When the preform is preformed, the first positioning hole 4013 can be sealed by the sealing plate 14 to prevent the preform from being greatly deformed during the high-pressure gas filling process. Thus, the wall thickness of the fuel tank 1 is more uniform after forming. At the same time, a positioning column 7 is installed at one end of the sealing plate 14. The positioning column 7 is provided to improve the stability and accuracy of the pre-embedded part 2.

[0071] Furthermore, the first mold 401 has a first module 4014 , a second module 4015 and a third module 4016 , the second module 4015 and the third module 4016 are respectively located on both sides of the first module 4014 , and the installation cavity 4012 is located in the second module 4015 .

[0072] In this embodiment, the first mold 401 is set to a split form, and its main body is a first module 4014. The two ends of the first module 4014 are respectively a second module 4015 and a third module 4016. The split design facilitates the embedded part 2 to be removed from the installation cavity 4012 during demolding, thereby improving the quality of the fuel tank blow molding.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fuel tank blow molding device, characterized in that: The invention comprises a mold (4), and further comprises: A support frame (5), the support frame (5) being arranged on one side of the mold (4); A mechanical arm (6), the mechanical arm (6) being arranged on the support frame (5) in a lifting manner, the end of the mechanical arm (6) being provided with a clamping claw (601), the clamping claw (601) being used to grasp the baffle valve (3); The intermediate mold (403) has an inner cavity (4031), and a side wall of the inner cavity (4031) close to the first mold (401) has a through hole (4032), and the through hole (4032) is used to pass the baffle valve (3), and further comprises: A lifting seat (8), the lifting seat (8) being arranged in the inner cavity (4031) for lifting; A movable seat (9), the movable seat (9) being slidably disposed in the lifting seat (8), the movable seat (9) having a supporting portion; a baffle (10), the baffle (10) being arranged on the supporting portion, and after the movable seat (9) drives the baffle (10) to move, the baffle (10) opens or closes the through hole (4032); The mechanical arm (6) has a push rod (602) on the side close to the moving seat (9), and the upper side of the moving seat (9) has a guide groove (901). After the mechanical arm (6) moves close to the moving seat (9), one end of the push rod (602) penetrates into the guide groove (901). a guide seat (11), the guide seat (11) being arranged in the inner cavity (4031), the guide seat (11) having a protrusion (1101), the protrusion (1101) and the through hole (4032) being located at the same height, and one end of the movable seat (9) being in contact with the guide seat (11); A first elastic member (12), wherein two ends of the first elastic member (12) are respectively arranged at the bottom of the lifting seat (8) and the inner cavity (4031); A second elastic member (13), wherein two ends of the second elastic member (13) are respectively arranged on the movable seat (9) and the lifting seat (8), and the second elastic member (13) is used to provide a force for the movable seat (9) to approach the guide seat (11).

2. A fuel tank blow molding device according to claim 1, characterized in that: The first mold (401) has an installation cavity (4012), the installation cavity (4012) is used to install the embedded component (2), and further comprises: A first positioning hole (4013), the first positioning hole (4013) being formed on the first mold (401), the first positioning hole (4013) being connected to and concentric with the installation cavity (4012); a sealing plate (14), the sealing plate (14) being detachably arranged at one end of the first positioning hole (4013); A positioning column (7), wherein the positioning column (7) is arranged at one end of the sealing plate (14) close to the embedded component (2), and the outer wall of the positioning column (7) abuts against the inner wall of the embedded component (2).

3. A fuel tank blow molding device according to claim 2, characterized in that: The first mold (401) comprises a first module (4014), a second module (4015) and a third module (4016); the second module (4015) and the third module (4016) are respectively located on two sides of the first module (4014); and the installation cavity (4012) is located in the second module (4015).

4. A fuel tank blow molding process, using a fuel tank blow molding device according to any one of claims 1 to 3, characterized in that: A method for installing a split ICV on a fuel tank (1), wherein the ICV comprises an embedded part (2) and a flapper valve (3), comprises the following steps: S1, blow molding preparation: installing the embedded part (2) on the mold (4); S2, preforming: injecting a preform into the mold (4) and filling the mold (4) with high-pressure gas, so that the preform and the embedded part (2) are fused and embedded; S3, installing the flapper valve (3): installing the flapper valve (3) on the inner wall of the formed preform; S4, cooling and molding: introducing a cooling medium into the mold (4) to accelerate the hardening and molding of the parison; S5, drilling holes: drilling holes in the blank between the baffle valve (3) and the embedded part (2).

5. A fuel tank blow molding process according to claim 4, characterized in that: In the step S1, the mold (4) comprises a first mold (401), a second mold (402) and an intermediate mold (403), and the embedded part (2) is arranged on the first mold (401).

6. A fuel tank blow molding process according to claim 5, characterized in that: In step S2, the first mold (401) and the intermediate mold (403) form a first molding cavity (4011), the second mold (402) and the intermediate mold (403) form a second molding cavity (4021), and one end of the embedded part (2) extends into the first molding cavity (4011).

7. A fuel tank blow molding process according to claim 6, characterized in that: The length of the embedded part (2) penetrating into the first molding cavity (4011) is less than half the wall thickness of the fuel tank (1).

8. A fuel tank blow molding process according to claim 5, characterized in that: In the step S3, the flapper valve (3) is extended from the intermediate mold (403) and then installed on the preform. After installation, the flapper valve (3) is arranged concentrically with the embedded part (2). After installation, the intermediate mold (403) is withdrawn from between the first mold (401) and the second mold (402), and the first mold (401) and the second mold (402) are molded together.

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