Oil tank production mold and oil tank production method

Abstract

The invention relates to the technical field of oil tank production and machining, and discloses an oil tank production mold and an oil tank production method.The oil tank production mold comprises a first mold base, and the first mold base is provided with a first mold cavity; the second mold base is provided with a second mold cavity, and the first mold cavity and the second mold cavity define a mold cavity used for forming the oil tank; the mold closing gap adjusting assembly is movably arranged between the first mold base and the second mold base and used for controlling a mold closing gap between the first mold cavity and the second mold cavity; the material blocking assembly is movably arranged on the side edge of the mold cavity and used for sealing the mold closing gap; the cutting assembly is arranged between the side edge of the first die cavity and the material blocking assembly and is tightly attached to the material blocking assembly; and the driving assembly is arranged on the first die holder, is connected with the cutting assembly and is used for driving the cutting assembly to cut the outer edge materials of the oil tank. According to the oil tank production die, a middle die can be omitted, flash materials generated by cutting off through the middle die are omitted, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of fuel tank manufacturing and processing technology, specifically to a fuel tank manufacturing mold and a fuel tank manufacturing method. Background Technology

[0002] Existing plastic fuel tank production typically employs a C-type process. This process requires the use of an intermediate mold, which results in a scrap rate as high as 20%-30%. Material transfer and secondary mold closing extend the production cycle by more than 30%, leading to a long production cycle, significant raw material waste, and a lack of competitive advantage in the market.

[0003] Although the traditional circular blanking process can reduce scrap rate and production costs, it cannot meet the functional requirements of high-pressure built-in oil tanks, which must rely on a two-piece structure. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a fuel tank production mold and a fuel tank production method. The fuel tank production mold can eliminate the use of an intermediate mold while meeting the functional requirements of a high-pressure built-in fuel tank, save the flash material generated by cutting with an intermediate mold, shorten the molding cycle, increase output, and reduce production costs.

[0005] To achieve the above objectives, the present invention provides a fuel tank manufacturing mold, comprising: A first mold base, the first mold base having a first mold cavity; The second mold base has a second mold cavity, and the first mold cavity and the second mold cavity together form a cavity for molding the oil tank; A mold closing gap adjustment assembly is movably disposed between the first mold base and the second mold base to control the mold closing gap between the first mold cavity and the second mold cavity; A baffle assembly is movably disposed on the side of the cavity to seal the mold closing gap; The cutting component is disposed between the side of the first mold cavity and the material stop component and fits tightly together; A drive assembly is disposed on the first mold base, and the drive assembly is connected to the cutting assembly to drive the cutting assembly to cut the outer edge material of the oil tank.

[0006] Optionally, the material stop assembly includes: Multiple sets of first baffle assemblies are respectively disposed on the upper side and lower side of the first mold cavity and the second mold cavity; Multiple sets of second baffle assemblies are respectively disposed on the left side and the right side of the first mold cavity and the second mold cavity.

[0007] Optionally, the first baffle assembly includes: First baffle plate; A guide rail fixing base is disposed on the first mold base or the second mold base, and the guide rail fixing base has an inclined mounting surface that is inclined toward the cavity direction; The guide rail is provided on the mounting slope. The first baffle plate connecting block has one end connected to the first baffle plate and the other end slidably connected to the guide rail; The first baffle plate driving mechanism is connected to the first baffle plate connecting block to drive the first baffle plate connecting block to move on the guide rail.

[0008] Optionally, the second baffle assembly includes: Second baffle plate; The second baffle plate connecting block is connected at one end to the side of the second baffle plate away from the cavity; The second baffle plate driving mechanism is disposed on the first mold base or the second mold base, and the output end of the second baffle plate driving mechanism is connected to the other end of the second baffle plate connecting block.

[0009] Optionally, the second baffle assembly further includes a baffle guide block disposed on the first mold base or the second mold base, wherein the baffle guide block is perpendicular to the oil tank blank and is slidably connected to the second baffle.

[0010] Optionally, the cutting component includes: Two sets of first cutters are arranged parallel to each other and spaced apart on the upper and lower sides of the first mold cavity; Two sets of second cutters are arranged parallel to each other and spaced apart on the left and right sides of the first mold cavity.

[0011] Optionally, the cutting assembly further includes two sets of cutting guide blocks disposed on the first mold base, the two sets of cutting guide blocks being perpendicular to the oil tank blank and slidably connected to the corresponding second cutter.

[0012] Optionally, the driving assembly includes a first driving device and a second driving device respectively connected to the first cutter and the second cutter. The first driving device drives the first cutter to move in a direction perpendicular to the mold closing direction, and the second driving device drives the second cutter to move in the mold closing direction, so as to cut the outer edge material of the oil tank respectively.

[0013] Optionally, the mold closing gap adjustment assembly includes: The first guide post is disposed on the first mold base; The second guide post is disposed on the second mold base and is disposed opposite to the first guide post; The first pad is movably disposed on the top surface of the second guide post; A limiting cylinder is disposed on the second mold base, and the output end of the limiting cylinder is connected to the first pad block.

[0014] A second aspect of the present invention provides a method for producing fuel tanks using the aforementioned fuel tank production mold, the method comprising: Drive the first mold base and the second mold base to open the mold; The circular blank is moved between the first mold cavity and the second mold cavity; The drive mold closing clearance adjustment component moves between the first mold base and the second mold base; Drive the first mold base and the second mold base to perform the first mold closing; The circular blank is blow-molded to form a semi-finished fuel tank by fitting it with the first mold cavity and the second mold cavity.

[0015] Through the above technical solution, the fuel tank production mold and fuel tank production method provided by the present invention change the original C-shaped blank to a circular blank for production. By utilizing the cooperation of the mold closing gap adjustment component, the material blocking component and the cutting component, the preliminary formed blank is cut into two pieces to facilitate the subsequent installation of internal components. The fuel tank production mold can eliminate the use of intermediate molds while meeting the functional requirements of high-pressure internal fuel tanks, saving the flash material generated by cutting with intermediate molds, shortening the molding cycle, increasing output and reducing production costs. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of a fuel tank production mold provided by the present invention; Figure 2 This is a top view of the first mold base in this invention; Figure 3 This is a schematic diagram of the mold closing gap adjustment component in this invention; Figure 4 This is a schematic diagram of the structure of the first mold cavity in this invention; Figure 5 This is a schematic diagram of the fuel tank manufacturing process of the present invention; Figure 6 This is a partial three-dimensional schematic diagram of the fuel tank production mold of the present invention; Figure 7 This is a schematic diagram of the structure of the first baffle assembly in this invention.

[0017] Explanation of reference numerals in the attached figures 1. First mold base; 11. First mold cavity; 2. Second mold base; 21. Second mold cavity; 31. First baffle plate; 32. Guide rail fixing base; 33. Guide rail; 34. First baffle plate connecting block; 35. First baffle plate driving mechanism; 41. Second baffle plate; 42. Second baffle plate connecting block; 43. Second baffle plate driving mechanism; 44. Baffle plate guide block; 51. First cutter; 52. Second cutter; 53. Cutter guide block; 61. First driving device; 62. Second driving device; 7. Mold closing gap adjustment assembly; 71. First guide post; 72. Second guide post; 73. First pad block; 74. Limiting cylinder; 8. Die; 91. First blank clamping claw; 92. Second blank clamping claw; 93. Air blowing pipe. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] Figure 1 This is a front view structural diagram of a fuel tank production mold provided by the present invention; Figure 6 This is a partial three-dimensional schematic diagram of the fuel tank manufacturing mold of the present invention. Figure 1 and Figure 6 The fuel tank production mold may include a first mold base 1, a second mold base 2, a mold closing gap adjustment component 7, a material blocking component, a cutting component, and a drive component.

[0020] Specifically, the first mold base 1 has a first mold cavity 11, and the second mold base 2 has a second mold cavity 21. The first mold cavity 11 and the second mold cavity 21 together form a cavity for molding an oil tank. The mold closing gap adjustment component 7 is movably disposed between the first mold base 1 and the second mold base 2 to control the mold closing gap between the first mold cavity 11 and the second mold cavity 21. The material stop component is movably disposed on the side of the cavity to seal the mold closing gap. The cutting component is disposed between the side of the first mold cavity 11 and the material stop component and fits tightly. The driving component is disposed on the first mold base 1 and is connected to the cutting component to drive the cutting component to cut the outer edge material of the oil tank.

[0021] Combination Figure 4 and Figure 6 As shown, the first mold base 1 and the second mold base 2, through a mold closing action, cause the first mold cavity 11 and the second mold cavity 21 to close together to form a cavity for molding the oil tank. Figure 3As shown in the figure, the mold closing gap adjustment component 7 is used to move between the first mold base 1 and the second mold base 2 when the first mold base 1 and the second mold base 2 are closed, so that a certain gap is maintained between the first mold cavity 11 and the second mold cavity 21. At this time, the baffle component located on the side of the cavity has moved to the gap before the first mold closing and fits tightly with the gap after the mold closing, preventing the molding material from overflowing from the mold closing gap and avoiding material waste. After the oil tank is initially formed, the baffle component moves out, and the drive component drives the cutting component close to the side of the first mold cavity 11 to cut the outer edge material of the oil tank, so as to form two blanks to facilitate the subsequent installation of the internal parts. This oil tank production mold can eliminate the use of the intermediate mold while meeting the functional requirements of the high-pressure internal oil tank, saving the flash material generated by the intermediate mold cutting, shortening the molding cycle, increasing output, and reducing production costs.

[0022] Current plastic fuel tank production uses a C-shaped process. This process utilizes C-shaped blanks to manufacture the fuel tanks. Specifically, the C-shaped fuel tank production process is as follows: First, the C-shaped blank is cut; second, an intermediate mold is inserted, at which point the C-shaped blank encloses the intermediate mold; third, the blank is cut into two pieces using the die's cutting edge and the intermediate mold; fourth, the internal component tooling is inserted between the two blank pieces to install the internal component; fifth, the mold is closed to form the finished product. In this production process, the maintenance costs of the tooling fixtures and intermediate mold account for 15% of the production cost. Furthermore, the use of the intermediate mold leads to a scrap rate of 20%-30% and a production cycle extension of over 30%. Coupled with the intensified competition in the new energy vehicle market, the profit margin of traditional fuel tank products has been compressed to below 8%.

[0023] Traditional circular blanking production methods can reduce scrap rate and shorten mold debugging time and production cycle, but they are not suitable for producing high-pressure oil tanks with built-in components.

[0024] Based on this, the fuel tank production mold provided by this invention features a structural design on the mold closing die, allowing for circular blanking and eliminating the intermediate mold, forming two blanks in the first mold closing. This application integrates in-mold cutting technology, breaking through the technical paradigm of traditional fuel tank forming processes, achieving a technological leap in material utilization, production efficiency, and product performance, and possessing significant industry technological innovation value.

[0025] In this embodiment of the invention, the baffle assembly may include multiple sets of first baffle assemblies and multiple sets of second baffle assemblies.

[0026] Multiple sets of first baffle assemblies are respectively disposed on the upper and lower sides of the first mold cavity 11 and the second mold cavity 21. Multiple sets of second baffle assemblies are respectively disposed on the left and right sides of the first mold cavity 11 and the second mold cavity 21.

[0027] In this invention, four sets of first baffle assemblies are respectively disposed on the upper side of the first mold cavity 11, the upper side of the second mold cavity 21, the lower side of the first mold cavity 11, and the lower side of the second mold cavity 21. Four sets of second baffle assemblies are respectively disposed on the left side of the first mold cavity 11, the right side of the first mold cavity 11, the left side of the second mold cavity 21, and the right side of the second mold cavity 21.

[0028] Multiple sets of first baffle assemblies and multiple sets of second baffle assemblies are distributed around the periphery of the mold cavity, which avoids the large volume design of centralized baffle structures, helps to miniaturize and lighten the mold, thereby reducing the material cost of mold manufacturing.

[0029] Furthermore, such as Figure 7 As shown, the first baffle assembly may include a first baffle plate 31, a guide rail fixing base 32, a guide rail 33, a first baffle plate connecting block 34, and a first baffle plate driving mechanism 35.

[0030] The guide rail fixing base 32 is disposed on the first mold base 1 or the second mold base 2. The guide rail fixing base 32 has an inclined mounting surface that is inclined towards the cavity. The guide rail 33 is disposed on the inclined mounting surface. One end of the first baffle plate connecting block 34 is connected to the first baffle plate 31, and the other end is slidably connected to the guide rail 33. The first baffle plate driving mechanism 35 is connected to the first baffle plate connecting block 34 to drive the first baffle plate connecting block 34 to move on the guide rail 33.

[0031] Since the mounting slope of the guide rail fixing base 32 is inclined towards the cavity, and the guide rail 33 is arranged along this mounting slope, when the first baffle plate connecting block 34 moves along the guide rail 33 under the action of the first baffle plate driving mechanism 35, the actual movement trajectory of the first baffle plate 31 is an oblique feed "from the edge of the mold base to the center of the cavity". Driven by the first baffle plate driving mechanism 35, the first baffle plate connecting block 34 moves downward or upward along the inclined guide rail 33, eventually causing the lower edge (or upper edge) of the first baffle plate 31 to contact the upper surface (or lower surface) of the blank, forming an upward supporting force or a downward pressing force, fixing the blank in the cavity.

[0032] After the mold is closed, the first baffle plate drive mechanism 35 needs to reverse its action to drive the first baffle plate connecting block 34 to move along the guide rail 33 in a direction away from the cavity (i.e., reset from the center of the cavity to the edge of the mold base), so as to make room for the first cutter 51 to run.

[0033] The first baffle drive mechanism 35 can be of various forms known to those skilled in the art, such as a cylinder, a hydraulic cylinder, or a servo electric cylinder.

[0034] The connection between the first baffle plate connecting block 34 and the first baffle plate 31 can be achieved by bolt connection, welding or other reliable connection methods to ensure a firm connection that will not loosen during operation.

[0035] In this invention, the second baffle assembly may include a second baffle plate 41, a second baffle plate connecting block 42, and a second baffle plate driving mechanism 43. One end of the second baffle plate connecting block 42 is connected to the side of the second baffle plate 41 away from the cavity, and the other end is connected to the output end of the second baffle plate driving mechanism 43. The second baffle plate driving mechanism 43 is disposed on the first mold base 1 or the second mold base 2.

[0036] The running direction of the second baffle plate 41 is consistent with the mold closing direction.

[0037] In some embodiments, the second baffle plate connecting block 42 is configured as L-shaped.

[0038] In some embodiments, one end of the second baffle plate connecting block 42 is connected to the middle of the second baffle plate 41 to ensure the deformation resistance and positioning accuracy of the second baffle plate 41 during movement.

[0039] The second baffle drive mechanism 43 can be of various forms known to those skilled in the art, such as a cylinder, a hydraulic cylinder, or a servo electric cylinder.

[0040] Furthermore, the second baffle assembly also includes a baffle guide block 44, which is disposed on the first mold base 1 or the second mold base 2. The baffle guide block 44 is perpendicular to the oil tank blank and is slidably connected to the second baffle 41.

[0041] The guide block 44 ensures that the second stop block moves vertically along the mold closing direction. Specifically, the guide block 44 can be configured as an L-shaped structure, wherein the short side of the L-shape is fixed to the corresponding mold base, i.e., the first mold base 1 or the second mold base 2, as an installation reference. A slide rail can be provided on the side of the long side of the L-shape facing the second stop plate 41. This slide rail forms a sliding engagement with the slider disposed on the surface of the second stop plate 41 away from the cavity, thereby constraining the movement trajectory of the second stop plate 41 and ensuring that it moves strictly in the vertical direction during the mold closing process.

[0042] In some embodiments, multiple baffle guide blocks 44 may be provided. The multiple baffle guide blocks 44 are evenly and spaced apart in the vertical direction on the first mold base 1 or the second mold base 2, and each baffle guide block 44 is slidably connected to the second baffle 41 to enhance the guiding stability of the second baffle 41 during the movement process and reduce its shaking or deviation.

[0043] In this embodiment of the invention, combined with Figure 1 and Figure 2As shown, the cutting assembly may include two sets of first cutters 51 and two sets of second cutters 52. Specifically, the two sets of first cutters 51 are arranged parallel to each other and spaced apart on the upper and lower sides of the first mold cavity 11, and the two sets of second cutters 52 are arranged parallel to each other and spaced apart on the left and right sides of the first mold cavity 11.

[0044] With four sets of cutters working simultaneously, the product's four sides can be cut at the same time, completing the cutting process in one go.

[0045] Understandably, the blade body can be made of high-strength, high-hardness alloy steel, such as high-speed steel or cemented carbide, to ensure sufficient wear resistance and impact resistance during the cutting process. The blade edge must ensure its sharpness and straightness.

[0046] One end of the first cutting blade 51 needs to extend out of the first mold cavity 11 to ensure that the flash material on the top and bottom sides of the product can be completely cut off during the cutting process.

[0047] Similarly, the cutting edge length of the second cutter 52 must be greater than the height of the cavity.

[0048] Furthermore, the cutting assembly also includes two sets of cutting guide blocks 53, which are disposed on the first mold base 1. The two sets of cutting guide blocks 53 are perpendicular to the oil tank blank and are slidably connected to the corresponding second cutter 52. The cutting guide blocks 53 can ensure that the second cutter 52 moves perpendicularly along the mold closing direction, and are parallel to and spaced apart from the baffle plate guide block 44.

[0049] Specifically, the cutter guide block 53 can be configured as an L-shaped structure, wherein the short side of the L-shape is fixed on the first mold base 1 as an installation reference. A slide rail can be provided on the side of the long side of the L-shape facing the second cutter 52. This slide rail forms a sliding engagement with the slider disposed on the surface of the second cutter 52 away from the cavity, thereby constraining the movement trajectory of the second cutter 52 and ensuring that it moves strictly in the vertical direction during the mold closing process.

[0050] In some embodiments, multiple cutter guide blocks 53 may be provided. The multiple cutter guide blocks 53 are evenly and spaced apart in the vertical direction on the first mold base 1, and each cutter guide block 53 is slidably connected to the second cutter 52 to enhance the guiding stability of the second cutter 52 during movement and reduce its shaking or deviation.

[0051] In this invention, the driving assembly includes a first driving device 61 and a second driving device 62 respectively connected to the first cutter 51 and the second cutter 52. The first driving device 61 drives the first cutter 51 to move in a direction perpendicular to the mold closing direction, and the second driving device 62 drives the second cutter 52 to move in the mold closing direction, so as to cut the outer edge material of the oil tank respectively.

[0052] In some embodiments, the first drive device 61 can be of various forms known to those skilled in the art, preferably a magnetic rodless cylinder. The magnetic rodless cylinder is fixed on the first mold base 1, and its setting direction is perpendicular to the mold closing direction. The end of the first cutter 51 away from the product is fixed on the external magnetic slider of the magnetic rodless cylinder, and moves in a linear reciprocating motion together with the magnetic slider.

[0053] The reciprocating motion of the first cutting tool 51 does not need to be transmitted through a mechanical rod. The cylinder body of the rodless cylinder can be directly installed in a narrow space, saving the lateral space of the mold.

[0054] In some embodiments, the second drive device 62 may be of various forms known to those skilled in the art, such as a cylinder, a hydraulic cylinder or a servo electric cylinder, with its output shaft arranged along the mold closing direction and consistent with the mold opening and closing action direction.

[0055] Since the outer edge material of the fuel tank blank is usually distributed around the entire circumference of the cavity, the second cutter 52 needs to cover a long cutting range. Multiple second drive devices 62 can be set up. The multiple second drive devices 62 are evenly arranged along the length direction of the second cutter 52. The output is adjusted in real time by a multi-axis synchronous control system to ensure that the displacement of each drive point is consistent. At the same time, the running deviation can be further reduced by precision machining of the mounting surface, floating joint connection and dynamic counterweight balance, so as to ensure the linear motion accuracy of the second cutter 52 in the mold closing direction and avoid problems such as cutting burrs and cavity damage caused by skewing.

[0056] In this embodiment of the invention, combined with Figure 3 and Figure 6 As shown, the mold closing gap adjustment assembly 7 may include a first guide post 71, a second guide post 72, a first pad 73, and a limit cylinder 74.

[0057] Specifically, the first guide post 71 is disposed on the first mold base 1, and the second guide post 72 is disposed on the second mold base 2, opposite to the first guide post 71. The first pad 73 is movably disposed on the top surface of the second guide post 72. The limiting cylinder 74 is disposed on the second mold base 2, and the output end of the limiting cylinder 74 is connected to the first pad 73. It can be understood that the first guide post 71 and the second guide post 72 are disposed on the outer side of the second baffle plate 41 away from the cavity.

[0058] The first guide post 71 and the second guide post 72 are disposed opposite to each other on the first mold base 1 and the second mold base 2, and are used to control the mold closing gap and adjust the clamping thickness of the product. It can be understood that multiple first guide posts 71 and multiple second guide posts 72 can be provided. Multiple first guide posts 71 and multiple second guide posts 72 can be distributed in a rectangular shape on the left and right sides of the first mold cavity 11 and the second mold cavity 21, and multiple first guide posts 71 and multiple second guide posts 72 are arranged in a one-to-one correspondence.

[0059] The end of the first pad 73 away from the cavity is connected to the output end of the limiting cylinder 74. The limiting cylinder 74 can drive the first pad 73 to move along a direction perpendicular to the mold closing direction to the side opposite to the second guide post 72 and the first guide post 71 during the first mold closing, so that there is a sufficient mold closing gap between the first mold cavity 11 and the second mold cavity 21, so as to avoid the blanks in the first mold cavity 11 and the second mold cavity 21 from sticking together directly during the first mold closing, and thus failing to form two pieces under the action of the cutting component.

[0060] It is understandable that multiple sets of the first pad 73 can be provided, and the multiple sets of the first pad 73 are distributed in a rectangular shape on the left and right sides of the second mold cavity 21.

[0061] On the other hand, the present invention also provides a method for producing fuel tanks using the above-mentioned fuel tank production mold, the production method comprising: Step 1: Drive the first mold base 1 and the second mold base 2 to open the mold; Step 2: Move the circular blank between the first mold cavity 11 and the second mold cavity 21; Step 3: Move the mold closing gap adjustment component 7 between the first mold base 1 and the second mold base 2; Step 4: Drive the first mold base 1 and the second mold base 2 to perform the first mold closing; Step 5: Blow-mold the circular blank to form a semi-finished fuel tank by fitting it with the first mold cavity 11 and the second mold cavity 21; Step 6: Start the drive assembly to move the cutting assembly to cut off the outer edge material of the semi-finished oil tank and form two blanks; Step 7: Drive the built-in tooling into the two blanks and install the built-in oil tank component; Step 8: Drive the first mold base 1 and the second mold base 2 to perform a second mold closing to form the finished oil tank.

[0062] In steps 1 and 2, the first mold base 1 and the second mold base 2 are driven to open the mold, as follows: Figure 5 As shown, the circular blank is lowered to the specified length by the die 8. The first blank clamping claw 91 located above the die absorbs and clamps the upper end of the circular blank, moving it between the first mold cavity 11 and the second mold cavity 21. At this time, the second blank clamping claw 92 located below the die clamps the lower end of the blank and blows air onto the blank through the air blowing pipe 93 directly below the blank.

[0063] In steps 3 and 4, the limiting cylinder 74 drives the first pad 73 to move to the axial alignment position of the second guide post 72 and the first guide post 71. When the mold closes, the first pad 73 is in contact with the first guide post 71 and the second guide post 72, respectively. The first mold base 1 and the second mold base 2 begin the first mold closing. At this time, the first baffle plate 31 and the second baffle plate 41 seal the mold closing gap controlled and maintained by the first pad 73 at the mold cavity parting surface of the first mold cavity 11 and the second mold cavity 21. It can be understood that the mold closing gap refers to the gap reserved between the first mold cavity 11 and the second mold cavity 21 when the mold is closed, which is used to control the material flow or the expansion space during blow molding. The mold cavity parting surface refers to the contact surface between the first mold cavity 11 and the second mold cavity 21 when the mold is closed. The first pad 73 can act on this area to adjust the gap.

[0064] In step 5, a high-pressure blow molding process is used to plastically deform the circular blank, causing it to expand radially and uniformly until it completely conforms to the surfaces of the first mold cavity 11 and the second mold cavity 21, forming a semi-finished fuel tank with a predetermined geometric shape and wall thickness distribution. This process requires control of the blowing pressure, holding time, and mold temperature to ensure the dimensional stability and mechanical properties of the molded part. Furthermore, after the blank is initially formed, the first baffle plate drive mechanism 35 drives the first baffle plate 31 to move away from the mold cavity along the guide rail 33 arranged on the mounting slope, creating operating space for the first cutter 51.

[0065] In step 6, the drive assembly is activated, driving the cutting assembly to move and cut off the outer edge material of the semi-finished fuel tank, forming two blanks. Specifically, the first drive device 61 drives the first cutter 51 to move from one end of the first mold base 1 to the other end of the first mold base 1 along a direction perpendicular to the mold closing direction to cut the edge material on the upper and lower sides of the semi-finished fuel tank. The second drive device 62 drives the second cutter 52 to move along the mold closing direction to cut the edge material on the left and right sides of the semi-finished fuel tank. Due to the previously reserved mold closing gap, two shaped blanks will be formed after cutting.

[0066] In step 7, after the first mold base 1 and the second mold base 2 open, the limiting cylinder 74 drives the first pad block 73 to return to its initial position, and the second baffle plate 41 simultaneously retracts to a safe position along the slide rail on the baffle plate guide block 44. At this time, the built-in part tooling can be inserted into the inner cavity of the two blanks along the mold closing axis by a high-rigidity linear module or a six-axis robotic arm. After the relative position of the built-in part and the blank is corrected, it is fixed by a pneumatic clamp. The tooling applies axial pressing force or starts the hot melt welding head according to a preset program to make the built-in part reliably connected to the inner wall of the blank. After completion, the tooling is withdrawn.

[0067] In step 8, the first mold base 1 and the second mold base 2 close for the second time. Under the action of mold temperature and mold closing pressure, the molecular chains of thermoplastic materials interdiffusion occur at the contact surface of the two blanks, and after pressure holding, a seamlessly bonded oil tank is formed. Finally, the first mold base 1 and the second mold base 2 open for the third time. The first baffle plate driving mechanism 35 and the second baffle plate driving mechanism 43 drive the first baffle plate 31 and the second baffle plate 41 to reset to their initial positions in the mold closing direction, respectively. The above actions are automatically and cyclically executed to realize the continuous production of the built-in oil tank.

[0068] It is understood that the fuel tank production mold provided by this invention is also applicable to fuel tanks without internal components.

[0069] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A fuel tank manufacturing mold, characterized in that, include: The first mold base (1) has a first mold cavity (11); The second mold base (2) has a second mold cavity (21), and the first mold cavity (11) and the second mold cavity (21) together form a cavity for molding an oil tank; The mold closing gap adjustment component (7) is movably disposed between the first mold base (1) and the second mold base (2) to control the mold closing gap between the first mold cavity (11) and the second mold cavity (21); A baffle assembly is movably disposed on the side of the cavity to seal the mold closing gap; The cutting component is located between the side of the first mold cavity (11) and the material stop component and fits tightly together; A drive assembly is disposed on the first mold base (1). The drive assembly is connected to the cutting assembly to drive the cutting assembly to cut the outer edge material of the oil tank.

2. The fuel tank production mold according to claim 1, characterized in that, The material stop assembly includes: Multiple sets of first baffle assemblies are respectively disposed on the upper side and lower side of the first mold cavity (11) and the second mold cavity (21); Multiple sets of second baffle assemblies are respectively disposed on the left and right sides of the first mold cavity (11) and the second mold cavity (21).

3. The fuel tank production mold according to claim 2, characterized in that, The first baffle assembly includes: First baffle plate (31); A guide rail fixing base (32) is disposed on the first mold base (1) or the second mold base (2), and the guide rail fixing base (32) has an inclined mounting surface that is inclined toward the cavity direction; Guide rail (33) is provided on the mounting slope; The first baffle plate connecting block (34) is connected to the first baffle plate (31) at one end and slidably connected to the guide rail (33) at the other end. The first baffle plate drive mechanism (35) is connected to the first baffle plate connecting block (34) to drive the first baffle plate connecting block (34) to move on the guide rail (33).

4. The fuel tank production mold according to claim 2, characterized in that, The second baffle assembly includes: Second baffle plate (41); The second baffle plate connecting block (42) is connected at one end to the side of the second baffle plate (41) away from the cavity; The second baffle drive mechanism (43) is disposed on the first mold base (1) or the second mold base (2), and the output end of the second baffle drive mechanism (43) is connected to the other end of the second baffle connecting block (42).

5. The fuel tank production mold according to claim 4, characterized in that, The second baffle assembly further includes a baffle guide block (44), which is disposed on the first mold base (1) or the second mold base (2). The baffle guide block (44) is perpendicular to the oil tank blank and is slidably connected to the second baffle (41).

6. The fuel tank production mold according to claim 1, characterized in that, The cutting component includes: Two sets of first cutters (51) are arranged parallel to each other and spaced apart on the upper and lower sides of the first mold cavity (11); Two sets of second cutters (52) are arranged parallel to each other and spaced apart on the left and right sides of the first mold cavity (11).

7. The fuel tank production mold according to claim 6, characterized in that, The cutting assembly also includes two sets of cutting guide blocks (53), which are disposed on the first mold base (1). The two sets of cutting guide blocks (53) are perpendicular to the oil tank and are slidably connected to the corresponding second cutter (52).

8. The fuel tank production mold according to claim 6, characterized in that, The drive assembly includes a first drive device (61) and a second drive device (62) connected to the first cutter (51) and the second cutter (52) respectively. The first drive device (61) drives the first cutter (51) to move in a direction perpendicular to the mold closing direction, and the second drive device (62) drives the second cutter (52) to move in the mold closing direction, so as to cut the outer edge material of the oil tank respectively.

9. The fuel tank production mold according to claim 1, characterized in that, The mold closing gap adjustment assembly (7) includes: The first guide post (71) is disposed on the first mold base (1); The second guide post (72) is disposed on the second mold base (2) and is disposed opposite to the first guide post (71); The first pad (73) is movably disposed on the top surface of the second guide post (72); A limiting cylinder (74) is disposed on the second mold base (2), and the output end of the limiting cylinder (74) is connected to the first pad block (73).

10. A method for producing fuel tanks using the fuel tank production mold according to any one of claims 1-9, characterized in that, The method includes: Drive the first mold base (1) and the second mold base (2) to open the mold; The circular blank is moved between the first mold cavity (11) and the second mold cavity (21); Drive the mold closing gap adjustment component (7) to move between the first mold base (1) and the second mold base (2); Drive the first mold base (1) and the second mold base (2) to perform the first mold closing; The circular blank is blow molded to form a semi-finished oil tank in conjunction with the first mold cavity (11) and the second mold cavity (21); The drive assembly is activated, which drives the cutting assembly to move and cut off the outer edge material of the semi-finished fuel tank, forming two blanks. The drive unit inserts into the two blanks and installs the oil tank internal components; Drive the first mold base (1) and the second mold base (2) to perform a second mold closing to form the finished oil tank.

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