Fuel tank blow mold

Abstract

The present invention provides a fuel tank blow molding mold, comprising a first mold group, a second mold group and a clamping mechanism, the first mold group comprises a first support plate, a first template and a blowing mechanism; the first template is provided with a first inner cavity for molding one side of the fuel tank, the second mold group comprises a second template and a second support plate, the second template is provided with a second inner cavity for molding the other side of the fuel tank, the clamping mechanism comprises two sets of clamping assemblies arranged opposite to each other, each set of clamping assemblies comprises a clamping block for holding a partition, a push rod for pushing the clamping block to move toward the cavity and a linear driving structure for driving the push rod to move. The present invention arranges clamping blocks on the first template and the second template respectively, and arranges a linear driving structure to push the push rod to drive the clamping block to move; when the blank and the partition are placed between the first template and the second template, the partition can be clamped and fixed first, and then the mold is directly closed and blow molding is performed, which is efficient and simple in process.

Description

Technical Field

[0001] The invention belongs to the field of molds, and more specifically, relates to a fuel tank blow molding mold. Background Art

[0002] Lightweighting of automobiles has become an important development trend in the automobile industry, and this trend has led to a large increase in the application of plastics in automobiles. As a very critical component in the automobile fuel system, the automobile fuel tank plays an extremely important role. Plastic fuel tanks are light in weight and can be made according to the shape of the vehicle chassis space, so that the volume of the fuel tank can be increased as much as possible. Plastic fuel tanks are also increasingly used in vehicles. Plastic fuel tanks are currently made by multi-layer co-extrusion blow molding. Generally, a blank tube is placed in a mold, and then a needle is inserted into the blank to blow high-temperature and high-pressure gas into the blank to shape the blank.

[0003] Due to the large volume of automobile fuel tanks, a partition is often required in the fuel tank to reduce the vibration of the fuel in the tank; currently, most blow molding molds use an external bracket to support the partition, then initially close the mold and perform pre-blowing to preform the blank; then use an inclined top structure to support the partition, remove the external bracket, completely close the mold, and finally blow mold to fix the partition in the fuel tank. However, this method has a complex mold structure, many blow molding steps, and low efficiency. Summary of the invention

[0004] The object of the present invention is to provide a fuel tank blow molding mold to solve the problems of complex structure and process and low efficiency of fuel tanks made by blow molding molds in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a fuel tank blow molding mold is provided, comprising a first mold group and a second mold group, wherein the first mold group comprises a first support plate, a first template supported on the first support plate, and a blowing mechanism for blowing gas into a blank, wherein the blowing mechanism is installed on the first template; the first template is provided with a first inner cavity for molding one side of the fuel tank, the second mold group comprises a second template and a second support plate supporting the second template, the second template is provided with a second inner cavity for molding the other side of the fuel tank, and the first inner cavity and the second inner cavity are connected to each other. The inner cavity encloses a cavity for forming the fuel tank, and the fuel tank blow molding mold also includes a clamping mechanism for clamping and fixing the partition, and the clamping mechanism includes two sets of clamping assemblies arranged opposite to each other, each set of the clamping assemblies includes a clamping block for supporting the partition, a push rod for pushing the clamping block to move toward the cavity, and a linear drive structure for driving the push rod to move, and the two sets of the clamping assemblies are respectively installed on the first template and the second template, and the first template is provided with a first through hole for the corresponding push rod to pass through, and the second template is provided with a second through hole for the corresponding push rod to pass through.

[0006] Furthermore, each set of the clamping assemblies also includes a guide frame for guiding the movement of the push rod, and the guide frame is provided with a guide hole for guiding the sliding of the push rod. The guide frames of the two sets of the clamping assemblies are respectively fixed on the first template and the second template.

[0007] Furthermore, each set of the clamping assembly further includes a guide sleeve, and the guide sleeve is sleeved on the push rod, and the guide sleeves of the two sets of the clamping assemblies are respectively fixed in the first through hole and the second through hole.

[0008] Furthermore, each of the linear drive structures includes a push-pull lever hinged to the push rod in a middle area, a support block supporting one end of the push-pull lever, and a linear drive for driving the other end of the push-pull lever to swing, the linear drive is hinged to the other end of the push-pull lever, and the support block is hinged to the push-pull lever; the support blocks of the two sets of the linear drive structures are respectively installed on the first template and the second template, and the linear drives of the two sets of the linear drive structures are respectively installed on the first template and the second template.

[0009] Furthermore, the linear actuator is a driving cylinder, and one end of a piston rod of the driving cylinder is hinged to the push-pull lever.

[0010] Furthermore, each set of the clamping assembly also includes a pressure block for pressing against the other end of the piston rod of the driving cylinder, and the pressure block of the clamping assembly corresponding to the first template is installed on the second template, and the pressure block of the clamping assembly corresponding to the second template is installed on the first template.

[0011] Furthermore, a push column for pushing up the piston rod of the corresponding driving cylinder is installed on the pressing block.

[0012] Furthermore, a first parting edge is provided on the first template at the edge of the first inner cavity, a second parting edge is provided on the second template at a position corresponding to the first parting edge, a first corrugated groove is provided on the first template outside the first parting edge, and a second corrugated groove is provided on the second template outside the second parting edge.

[0013] Furthermore, the four corners of the first template are respectively provided with first cutting edges extending from the first parting edge to the edge of the first template, and the second template is correspondingly provided with second cutting edges that cooperate with the first cutting edges for cutting.

[0014] Furthermore, the fuel tank blow molding mold also includes a clamping mechanism for clamping the blank head, the clamping mechanism includes a first clamping frame installed on the first template and a second clamping frame for cooperating with the first clamping frame to clamp the blank head, and the second clamping frame is installed on the second template.

[0015] The beneficial effect of the fuel tank blow molding mold provided by the present invention is that compared with the prior art, the present invention respectively sets clamping blocks on the first template and the second template, and sets a linear drive structure to push the push rod to drive the clamping block to move; when the blank and the partition are placed between the first template and the second template, the partition can be clamped and fixed first, and then the mold can be directly closed and blow-molded, which is efficient and simple in process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a fuel tank blow molding mold provided by an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of a fuel tank blow molding mold;

[0019] Figure 3 for Figure 1 A schematic structural diagram of the first module in the fuel tank blow molding mold;

[0020] Figure 4for Figure 3 A schematic structural diagram of the first template in the first module group shown;

[0021] Figure 5 for Figure 3 A schematic structural diagram of the blowing mechanism and the positioning structure in the first module shown;

[0022] Figure 6 for Figure 5 Structural schematic diagram of the iron ring installed on the middle positioning structure;

[0023] Figure 7 for Figure 6 A schematic diagram of a cross-sectional structure of a positioning structure;

[0024] Figure 8 for Figure 3 The structural schematic diagram of the tube clamping and core pulling mechanism in the first module shown;

[0025] Fig. 9 for Figure 1 A schematic structural diagram of a second module in a fuel tank blow molding mold;

[0026] Fig.10 for Fig. 9 A schematic structural diagram of the second template in the second module group shown;

[0027] Fig.11 for Figure 1 A schematic diagram of the structure of two sets of clamping mechanisms in a fuel tank blow molding mold;

[0028] Fig.12 for Fig.11 A schematic diagram of the structure of a clamping mechanism;

[0029] Fig.13 for Figure 1 Schematic diagram of the structure of the exhaust plug in the fuel tank blow molding mold Figure 1 ;

[0030] Fig.14 for Figure 1 Schematic diagram of the structure of the exhaust plug in the fuel tank blow molding mold Figure 2 ;

[0031] Fig.15 for Figure 1 A schematic structural diagram of a first cooling mechanism and a second cooling mechanism in a fuel tank blow molding mold;

[0032] Fig.16 for Figure 1 Schematic diagram of the structure of the combination of inserts and adjustment pads in the fuel tank blow molding mold Figure 1 ;

[0033] Fig.17 for Fig.16Schematic diagram of the structure of the combination of the middle insert and the adjustment pad Figure 2 ;

[0034] Fig.18 for Fig.16 Schematic diagram of the structure when the middle insert and adjustment pad are disassembled.

[0035] Among them, the main marks of the drawings in the figure are:

[0036] 100-Fuel tank blow mold;

[0037] 11-mold cavity; 15-clamping mechanism; 151-first clamping frame; 152-second clamping frame;

[0038] 20-first module; 21-first template; 210-first inner cavity; 211-first parting edge; 212-first corrugated groove; 213-first cutting edge; 214-first through hole; 215-through hole; 217-mounting hole; 221-first support plate; 222-first support head; 223-first dustproof plate;

[0039] 31-blowing mechanism; 32-puncture needle; 32-air supply channel; 33-pushing structure; 331-support block; 332-pushing lever; 333-guide column; 334-pillar; 335-linear mover; 336-mounting plate; 337-support plate;

[0040] 35-positioning structure; 351-magnetic element; 36-support plate; 361-accommodating ring groove; 362-first sliding hole; 37-sliding sleeve; 38-push plate; 381-second sliding hole; 39-push cylinder; 392-third sliding hole;

[0041] 40-first cooling mechanism; 41-first cooling water channel; 411-first side water channel; 412-first bottom water channel; 42-first connecting water channel; 43-first water collecting block; 44-first connecting pipe;

[0042] 50-second module; 51-second template; 510-second inner cavity; 511-second parting edge; 512-second corrugated groove; 513-second cutting edge; 514-second through hole; 521-second support plate; 522-second support head; 523-second dustproof plate;

[0043] 60-second cooling mechanism; 61-second cooling water channel; 611-second side water channel; 612-second bottom water channel; 62-second connecting water channel; 63-second water collecting block; 64-second connecting pipe;

[0044] 70-clamping mechanism; 71-clamping assembly; 711-clamping block; 712-push rod; 713-guide frame; 714-guide sleeve; 72-linear drive structure; 721-first connecting rod; 722-first pivot; 723-second connecting rod; 724-second pivot; 725-third pivot; 73-push-pull lever; 731-first long hole; 732-second long hole; 74-support block; 75-driving cylinder; 752-mounting seat; 76-pressing block; 761-top column; 762-adjusting rod;

[0045] 81-exhaust plug; 810-exhaust channel; 811-ring sleeve; 812-cover; 813-connecting ring; 815-exhaust channel; 82-insert; 821-positioning hole; 822-conical section; 83-adjusting pad; 831-through hole; 825-accommodating groove; 85-tube core pulling mechanism; 851-support; 852-linear pusher; 853-support seat; 86-tube insert; 861-undercut groove; 87-slider; 871-connecting flow channel;

[0046] 90- fuel tank; 91- partition; 93- iron ring. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0050] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In the description of the present invention, 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Please also read Figures 1 to 18 Now, the fuel tank blow molding mold 100 provided by the present invention is described. The fuel tank blow molding mold 100 comprises a first module 20 and a second module 50. The first module 20 comprises a first support plate 221, a first template 21 and a blowing mechanism 31. The first template 21 is supported on the first support plate 221. The blowing mechanism 31 is used to blow gas into the blank. The blowing mechanism 31 is installed on the first template 21. The second module 50 comprises a second template 51 and a second support plate 521. The second template 51 is supported on the second support plate 521. The first template 21 is provided with a first inner cavity 210 for molding one side of the fuel tank 90. ​​The second template 51 is provided with a second inner cavity 510 for molding the other side of the fuel tank 90. ​​The first inner cavity 210 and the second inner cavity 510 are enclosed together to form a cavity 11 for molding the fuel tank 90.

[0053] See also Figures 1 to 4 and Figures 9 to 12The fuel tank blow molding mold 100 also includes a clamping mechanism 70, which is used to clamp and fix the partition 91; the clamping mechanism 70 includes two sets of clamping assemblies 71 arranged opposite to each other, each set of clamping assemblies 71 includes a clamping block 711, a push rod 712 and a linear drive structure 72, the two sets of clamping assemblies 71 are respectively installed on the first template 21 and the second template 51, the clamping block 711 is used to abut the partition 91, and the linear drive structure 72 is used to drive the push rod 712 to move, so that the push rod 712 pushes the clamping block 711 to move toward the cavity 11, so that the clamping blocks 711 of the two sets of clamping assemblies 71 are used to cooperate with clamping the partition 91; the two sets of clamping assemblies 71 are respectively installed on the first template 21 and the second template 51, the first template 21 is provided with a first through hole 214 for the corresponding push rod 712 to pass through, and the second template 51 is provided with a second through hole 514 for the corresponding push rod 712 to pass through. Therefore, when blow molding the fuel tank 90, the partition 91 can be placed between the first template 21 and the second template 51, and the clamping blocks 711 of the two sets of clamping assemblies 71 are used to cooperate to clamp the partition 91, and then the molds are closed and blow molded, and the fuel tank 90 is blow molded in one piece, which has a simple process, convenient production and high efficiency.

[0054] Compared with the prior art, the fuel tank blow molding mold 100 provided by the present invention respectively sets a clamping block 711 on the first template 21 and the second template 51, and sets a linear drive structure 72 to push the push rod 712, thereby driving the clamping block 711 to move; when the blank and the partition 91 are placed between the first template 21 and the second template 51, the partition 91 can be clamped and fixed first, and then the mold can be directly closed and blow-molded, which is efficient and simple in process.

[0055] For further information, see Figure 1 and Fig.11 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the clamping mechanism 70 is provided in two sets, so as to more stably clamp and fix the partition 91. Of course, in some other embodiments, the clamping mechanism 70 can also be provided in one set, three sets, and so on.

[0056] For further information, see Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of clamping components 71 further includes a guide frame 713 for guiding the push rod 712 to move. The guide frame 713 is provided with a guide hole (not shown in the figure) for guiding the push rod 712 to slide. The guide frames 713 of the two sets of clamping components 71 are respectively fixed to the first template 21 and the second template 51. The guide frame 713 can not only support the push rod 712, but also guide the movement of the push rod 712.

[0057] For further information, see Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of clamping components 71 further includes a guide sleeve 714, which is sleeved on the push rod 712, and the guide sleeves 714 of the two sets of clamping components 71 are respectively fixed in the first through hole 214 and the second through hole 514. Providing the guide sleeve 714 and installing the corresponding guide sleeve 714 in the first through hole 214 of the first template 21, or in the second through hole 514 of the corresponding second template 51, can not only guide the movement of the corresponding push rod 712, but also avoid direct friction between the push rod 712 and the corresponding first template 21 or second template 51, thereby reducing wear.

[0058] For further information, see Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each linear drive structure 72 includes a push-pull lever 73, a support block 74 and a linear driver. The middle area of ​​the push-pull lever 73 is hinged with the push rod 712. The support block 74 supports one end of the push-pull lever 73. The support block 74 is hinged with the push-pull lever 73. The linear driver is used to drive the other end of the push-pull lever 73 to swing, and then drive the push rod 712 to move linearly through the push-pull lever 73. This structure is more labor-saving and flexible to move. The support blocks 74 of the two sets of linear drive structures 72 are respectively installed on the first template 21 and the second template 51, and the linear drivers of the two sets of linear drive structures 72 are respectively installed on the first template 21 and the second template 51.

[0059] For further information, see Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the linear actuator is a driving cylinder 75, and one end of the piston rod 751 of the driving cylinder 75 is hinged to the push-pull lever 73. The use of the driving cylinder 75 is low in cost, easy to install and use, and also easy to control. In some other embodiments, the linear actuator can also be a hydraulic cylinder, a linear motor, etc. In some other embodiments, the linear drive structure 72 can directly use a cylinder, a hydraulic cylinder, a linear motor, etc.

[0060] For further information, see Figure 1 , Figure 2 and Fig.12As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of clamping components 71 also includes a pressing block 76 for abutting the other end of the piston rod 751 of the driving cylinder 75. The pressing block 76 of the clamping component 71 corresponding to the first template 21 is installed on the second template 51, and the pressing block 76 of the clamping component 71 corresponding to the second template 51 is installed on the first template 21. The pressing block 76 is provided, and when each set of clamping components 71 clamps the partition 91, the piston rods 751 of the two driving cylinders 75 respectively abut the two pressing blocks 76, so that the stroke of the driving cylinder 75 is limited by the two pressing blocks 76, and when the first template 21 and the second template 51 are molded together, the piston rods 751 of the two driving cylinders 75 can be pushed to reset, and at the same time, the corresponding two clamping blocks 711 can be ensured to stably clamp the partition 91.

[0061] For further information, see Figure 1 , Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a push column 761 for pushing up the piston rod 751 of the corresponding driving cylinder 75 is installed on the pressing block 76. The push column 761 is arranged on the pressing block 76 so as to better push up the piston rod 751 of the corresponding driving cylinder 75.

[0062] For further information, see Figure 1 , Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each top column 761 is equipped with an adjusting rod 762 for adjusting the stroke of the piston rod 751 of the driving cylinder 75, and the adjusting rod 762 is threadedly installed on the top column 761. The adjusting rod 762 is provided, and the stroke of the piston rod 751 of the driving cylinder 75 can be adjusted by changing the depth at which the adjusting rod 762 is installed on the top column 761.

[0063] For further information, see Figure 1 , Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, an air hole (not shown in the figure) is opened in the clamping block 711, and an air passage (not shown in the figure) connecting the air hole is opened in the push rod 712 to better exhaust the gas in the cavity 11.

[0064] For further information, see Figure 1 , Figure 2 and Fig.12As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of linear drive structures 72 also includes a first connecting rod 721 connected to the push rod 712, a first pivot 722 connecting the first connecting rod 721 and the push-pull lever 73, and a first long hole 731 for the first pivot 722 to pass through is provided on the push-pull lever 73, and the first long hole 731 is extended in the length direction of the push-pull lever 73. The first long hole 731 is provided so that when the push-pull lever 73 swings in an arc, compensation is performed, thereby making the push rod 712 run in a straight line. Of course, in some embodiments, the first connecting rod 721 is hinged to the push rod 712, so that compensation is performed through the swing of the first connecting rod 721.

[0065] For further information, see Figure 1 , Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of linear drive structures 72 also includes a second connecting rod 723 connected to the linear drive, a second pivot 724 connecting the second connecting rod 723 and the push-pull lever 73, and a second elongated hole 732 for the second pivot 724 to pass through is provided on the push-pull lever 73, and the second elongated hole 732 is extended in the length direction of the push-pull lever 73. The second elongated hole 732 is provided so that when the linear drive runs linearly, compensation is performed, thereby pushing the push-pull lever 73 to swing in an arc. Of course, in some embodiments, the second connecting rod 723 is hinged to the linear drive, so that compensation is performed by the swing of the second connecting rod 723. Specifically, the second connecting rod 723 is connected to the piston rod 751 of the driving cylinder 75.

[0066] For further information, see Figure 1 , Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of linear drive structures 72 also includes a mounting seat 752 for supporting the linear drive. The mounting seat 752 is provided to facilitate the installation and fixing of the linear drive.

[0067] For further information, see Figure 1 , Figure 2 and Fig.12 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each set of linear drive structures 72 also includes a third pivot 725 connecting the push-pull lever 73 and the support block 74, and an axial hole for the third pivot 725 to pass through is opened on the push-pull lever 73 to hinge the push-pull lever 73 with the support block 74.

[0068] For further information, see Figure 4 and Fig.10As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a first parting edge 211 is provided on the edge of the first inner cavity 210 on the first template 21, and a second parting edge 511 is provided on the second template 51 at a position corresponding to the first parting edge 211. The first parting edge 211 cooperates with the second parting edge 511 to clamp the edge of the bad material so as to blow mold the fuel tank 90; and after the mold is closed, the residual material on the edge of the fuel tank 90 can be cut off to remove the residual material. A first corrugated groove 212 is provided on the first template 21 on the outside of the first parting edge 211, and a second corrugated groove 512 is provided on the second template 51 on the outside of the second parting edge 511. The first corrugated groove 212 and the corresponding second corrugated groove 512 can not only better exhaust, but also increase the heat dissipation area, which is convenient for heat dissipation.

[0069] For further information, see Figure 4 and Fig.10 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the four corners of the first template 21 are respectively provided with first cutting edges 213 extending from the first parting edge 211 to the edge of the first template 21, and the second template 51 is correspondingly provided with second cutting edges 513 for cutting in cooperation with each first cutting edge 213. The first cutting edges 213 are provided at the four corners of the first template 21, and the second cutting edges 513 are correspondingly provided on the second template 51, so that the edge residue of the fuel tank 90 can be divided to facilitate the removal of the edge residue of the fuel tank 90. ​​Of course, in some other embodiments, the first template 21 can be provided with more first cutting edges 213, and the second template 51 is provided with second cutting edges 513 corresponding to the first cutting edges 213.

[0070] For further information, see Figure 1 , Figure 3 and Fig. 9 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the fuel tank blow molding mold 100 also includes a clamping mechanism 15 for clamping a blank head, the clamping mechanism 15 includes a first clamping frame 151 installed on the first template 21 and a second clamping frame 152 for clamping the blank head in cooperation with the first clamping frame 151, and the second clamping frame 152 is installed on the second template 51. The first clamping frame 151 and the second clamping frame 152 are provided, and when the mold is closed, the part of the blank extending from the lower side of the first template 21 and the second template 51 can be clamped to fix the lower end of the blank, thereby facilitating blow molding.

[0071] For further information, see Figures 2 to 7As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a positioning structure 35 is provided in the first template 21, and the positioning structure 35 is used to detachably position the iron ring 93 in the first inner cavity 210, so that during blow molding, the blank expands and abuts against the inner surface of the first inner cavity 210 under the action of high-temperature and high-pressure gas, so that the iron ring 93 can be placed in the blank, and after the fuel tank 90 is cooled and molded, the iron ring 93 is molded on the fuel tank 90, and the connection is firm, no additional welding is required, and the fuel tank 90 will not be deformed.

[0072] For further information, see Figure 6 and Figure 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the positioning structure 35 includes a magnetic member 351 for magnetically positioning the iron ring 93, and the magnetic member 351 is installed on the first template 21. The magnetic member 351 can be used to magnetically attract the iron ring 93, and during blow molding, the blank is squeezed with the iron ring 93, so that the shell of the fuel tank 90 is fused with the iron ring 93, and after cooling, the iron ring 93 is fixed. Of course, in some other embodiments, a buckle structure can also be set on the first template 21, and the iron ring 93 is clamped by the buckle structure, so that the iron ring 93 is fused to the fuel tank 90 during blow molding.

[0073] For further information, see Figure 6 and Figure 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the magnetic attraction member 351 can be a magnetic ring or a plurality of magnets, and the plurality of magnets are arranged in a ring array to stabilize the magnetic attraction ring 93.

[0074] For further information, see Figure 6 and Figure 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the positioning structure 35 also includes a support plate 36, and the magnetic member 351 is installed on the support plate 36, and the support plate 36 is installed in the first template 21. The support plate 36 is provided to install and fix the magnetic member 351. Of course, in some other embodiments, the magnetic member 351 can also be directly fixed on the first template 21.

[0075] For further information, see Figure 6 and Figure 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a receiving ring groove 361 for positioning the iron ring 93 is provided in the support plate 36, and the magnetic attraction member 351 is provided in the receiving ring groove 361. The receiving ring groove 361 is provided in the support plate 36 to install and fix the magnetic attraction member 351, and at the same time, when the magnetic attraction member 351 magnetically attracts the iron ring 93, the iron ring 93 can be better positioned.

[0076] For further information, see Figure 6 and Figure 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the positioning structure 35 also includes a sleeve 37 installed in the first template 21 and a push-up cylinder 39 for pushing up the support plate 36, and the support plate 36 is installed in the sleeve 37. A through hole 215 is opened in the first template 21, the sleeve 37 is installed in the through hole 215, and the support plate 36 is installed in the sleeve 37, so that during blow molding, the support plate 36 can be pushed by the push-up cylinder 39, and then the iron ring 93 is pushed toward the fuel tank 90, so that the iron ring 93 can be better integrated into the shell of the fuel tank 90.

[0077] For further information, see Figure 6 and Figure 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the positioning structure 35 also includes a push plate 38 slidably installed in the sliding sleeve 37, the push plate 38 is connected to the piston rod 391 of the push cylinder 39, and the support plate 36 is installed on the push plate 38. The push plate 38 can slide more stably in the sliding sleeve 37, thereby pushing the support plate 36 to slide along the sliding sleeve 37; in addition, the support plate 36 and the push plate 38 can be made separately to reduce the processing accuracy requirements.

[0078] For further information, see Figure 2 and Figure 5 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the blowing mechanism 31 includes a needle 32 and a pushing structure 33. The needle 32 is used to pierce the blank to blow high-temperature and high-pressure gas into the blank so as to blow-mold the blank; the pushing structure 33 is used to drive the needle 32 to insert into the blank. The needle 32 is provided with a gas supply channel 321 for high-temperature and high-pressure gas to pass through, the sliding sleeve 37 is installed in the through hole 215, the support plate 36 is provided with a first sliding hole 362 for the needle 32 to pass through, and the pushing plate 38 is provided with a second sliding hole 381 for the needle 32 to pass through. This structure sets the needle 32 in the middle of the support plate 36, so that the needle 32 and the magnetic attraction member 351 can be better positioned, thereby ensuring the precise positioning of the opening on the fuel tank 90 and the iron ring 93. Of course, in some fuel tanks 90, there is no need to set a structure with an opening in the iron ring 93, and the blowing mechanism 31 and the positioning structure 35 can be set separately.

[0079] For further information, see Figures 5 to 7 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the ejector cylinder 39 is installed in the sliding sleeve 37 to reduce the occupied space and facilitate installation. In some other embodiments, the ejector cylinder 39 can also be installed on the first template 21.

[0080] For further information, see Figures 5 to 7As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a third sliding hole 392 for guiding the needle 32 to slide is provided in the piston rod 391 of the ejection cylinder 39. This structure allows the needle 32 to directly pass through the ejection cylinder 39, reducing the occupied space, and at the same time enables the ejection cylinder 39 to push the support plate 36 to move more smoothly.

[0081] For further information, see Figure 2 and Figure 5 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the pushing structure 33 includes a support block 331, a pushing lever 332, a guide column 333, a support column 334 and a linear mover 335. The linear mover 335 is hinged on the first template 21, the support column 334 is installed on the first template 21, the guide column 333 is installed on the first template 21, and the needle 32 is installed on the support block 331. The support block 331 supports the needle 32. The pushing lever 332 is used to push the support block 331 to move, thereby pushing the needle 32 to move. The support block 331 is provided with a sliding hole for the guide column 333 to pass through, so that the guide column 333 guides the support block 331 to move along the guide column 333; the support column 334 is hinged to the middle section of the pushing lever 332 to support the pushing lever 332 through the support column 334; one end of the pushing lever 332 is hinged to the support block 331, and the other end of the pushing lever 332 is hinged to the linear mover 335, so that the linear mover 335 can drive the other end of the pushing lever 332 to swing, and then drive the support block 331 to move along the guide column 333 through one end of the pushing lever 332.

[0082] For further information, see Figure 2 and Figure 5 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the pushing structure 33 further includes a mounting plate 336 mounted on the first template 21, the pillar 334 and the guide column 333 are fixed on the mounting plate 336, a support plate 337 is fixed on the mounting plate 336, and the linear mover 335 is hinged on the support plate 337. The mounting plate 336 is provided to install and fix the pushing structure 33.

[0083] For further information, see Figure 2 and Figure 5 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the linear mover 335 is a cylinder, a linear motor or a hydraulic cylinder. Of course, in other embodiments, the cylinder can also be used directly to push the needle 32 to move.

[0084] For further information, see Figure 3 , Figure 4 , Fig. 9 , Fig.10 , Fig.13 and Fig.14As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a plurality of exhaust channels 815 are provided on the first template 21 and the second template 51, and each exhaust channel 815 is connected to the cavity 11 so as to discharge the gas in the cavity 11; a plurality of exhaust plugs 81 are installed in the first inner cavity 210 and the second inner cavity 510, which cover each exhaust channel 815 respectively, and each exhaust plug 81 is provided with a plurality of exhaust channels 810. An exhaust plug 81 is provided on each exhaust channel 815, and an exhaust channel 810 is provided on the exhaust plug 81, so that the gas in the cavity 11 can enter the exhaust channel 815 from the exhaust channel 810; and the exhaust plug 81 is provided, so that when the fuel tank 90 is blow molded, the blank can be prevented from entering the exhaust channel 815, thereby avoiding the formation of convex points on the shell of the fuel tank 90, and ensuring the appearance of the fuel tank 90.

[0085] For further information, see Fig.13 and Fig.14 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each exhaust channel 810 is a narrow and long opening opened on the exhaust plug 81. Using the narrow and long opening to make the exhaust channel 810 can not only make the area of ​​each exhaust channel 810 larger, which is convenient for exhaust, but also ensure the good strength of the exhaust plug 81 and better prevent the blank from squeezing into the exhaust channel 810. Of course, in some other embodiments, the exhaust channel 810 can also be a hole-shaped structure such as a round hole.

[0086] For further information, see Fig.13 and Fig.14 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a plurality of exhaust passages 810 are arranged in parallel and at intervals to facilitate processing and manufacturing, and also facilitate design layout.

[0087] For further information, see Fig.13 and Fig.14 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each exhaust plug 81 includes a ring sleeve 811 and a cover 812 covering one end of the ring sleeve 811, and each exhaust channel 810 is opened on the cover 812. The ring sleeve 811 is provided not only to support the cover 812, but also to facilitate installation in the exhaust channel 815. In addition, the exhaust channel 810 is opened on the cover 812, which can ensure the good strength of the exhaust plug 81 and facilitate the processing and manufacturing of the exhaust channel 810. Of course, in some other embodiments, a channel can also be opened in an integral columnar structure to form the exhaust plug 81.

[0088] For further information, see Fig.13 and Fig.14As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a connecting ring 813 is provided in the ring sleeve 811, and the connecting ring 813 is connected to the cover 812. The connecting ring 813 can connect the parts between two adjacent exhaust passages 810 to increase the strength of the exhaust plug 81.

[0089] For further information, see Fig.13 and Fig.14 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the ring sleeve 811, the connecting ring 813 and the cover 812 of each exhaust plug 81 are integrally formed. The ring sleeve 811, the connecting ring 813 and the cover 812 are integrally formed to ensure the strength of the exhaust plug 81 and the connection strength of the cover 812, the ring sleeve 811 and the connecting ring 813.

[0090] For further information, see Figure 1 , Figure 3 , Figure 4 , Fig. 9 , Fig.10 and Fig.15As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the fuel tank blow molding mold 100 also includes a first cooling mechanism 40 and a second cooling mechanism 60. The first cooling mechanism 40 includes a plurality of first cooling water channels 41 arranged in the first template 21. Each first cooling water channel 41 includes two first side water channels 411 respectively arranged on both sides of the first template 21 and a first bottom water channel 412 connecting the two first side water channels 411. Each first bottom water channel 412 is arranged in the first template 21 at a position adjacent to the bottom surface of the first inner cavity 210. The first cooling mechanism 40 also includes two first connecting water channels 42 respectively connected to the first side water channels 411 corresponding to each side of the first template 21; thus, after blow molding, cooling water is supplied to the first cooling water channel 41 to quickly cool the cavity 11, thereby cooling the blank into shape. Specifically, the external water supply device is connected to a first connecting water channel 42 and supplies cooling water. The cooling water flows out through the corresponding first side water channel 411, the first bottom water channel 412, and another first side water channel 411 to another first connecting water channel 42 to realize the circulation of cooling water and the external cooling device, thereby ensuring that cooling water flows into the first cooling water channel 41, and the first inner cavity 210 of the first template 21 is cooled more quickly, thereby improving the cooling efficiency. Similarly, the second cooling mechanism 60 includes a plurality of second cooling water channels 61 arranged in the second template 51, each second cooling water channel 61 includes two second side water channels 611 respectively arranged on both sides of the second template 51 and a second bottom water channel 612 connecting the two second side water channels 611, each second bottom water channel 612 is arranged in the second template 51 at a position adjacent to the bottom surface of the second inner cavity 510, and the second cooling mechanism 60 also includes two second connecting water channels 62 respectively connecting the second side water channels 611 corresponding to each side of the second template 51. Therefore, after blow molding, cooling water is supplied to the second cooling water channel 61 to quickly cool the cavity 11, thereby cooling the blank. Specifically, the external water supply device is connected to a second connecting water channel 62 and supplies cooling water. The cooling water flows out through the corresponding second side water channel 611, the second bottom water channel 612, and another second side water channel 611 to another second connecting water channel 62 to realize the circulation of cooling water and the external cooling device, thereby ensuring that cooling water flows into the second cooling water channel 61, and the second inner cavity 510 of the second template 51 is cooled more quickly, thereby improving the cooling efficiency.

[0091] For further information, see Fig.15 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the angle between each first side water channel 411 and the corresponding first bottom water channel 412 is an obtuse angle, so that the cooling water can pass through the first cooling water channel 41 more smoothly, thereby improving the cooling efficiency. Similarly, the angle between each second side water channel 611 and the corresponding second bottom water channel 612 is an obtuse angle, so that the cooling water can pass through the second cooling water channel 61 more smoothly, thereby improving the cooling efficiency.

[0092] For further information, see Figure 1 , Figure 3 , Fig. 9 and Fig.15 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the first cooling mechanism 40 further includes two first water collecting blocks 43 and first connecting pipes 44 connecting the two first water collecting blocks 43 to the two first connecting water channels 42 respectively; the second cooling mechanism 60 further includes two second water collecting blocks 63 and second connecting pipes 64 connecting the two second water collecting blocks 63 to the two second connecting water channels 62 respectively. The two first water collecting blocks 43 and the two second water collecting blocks 63 are provided to facilitate connection with an external cooling water supply and recovery device for easy use.

[0093] For further information, see Figure 3 , Fig. 9 , Figures 16 to 18 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a plurality of inserts 82 for molding the area on the fuel tank 90 that contacts the vehicle body are detachably installed in the first template 21 and the second template 51, and correspondingly, receiving grooves 825 for fitting the inserts 82 are provided in the first template 21 and the second template 51. The receiving grooves 825 are provided in the first template 21 and the second template 51, and the inserts 82 are detachably installed in each receiving groove 825, so that when the fuel tank 90 is trial-produced, the inserts 82 mold the area on the fuel tank 90 that contacts the vehicle body, and inserts 82 of different sizes can be replaced to avoid the size difference of the area on the fuel tank 90 that contacts the vehicle body.

[0094] For further information, see Figure 3 , Fig. 9 , Figures 16 to 18 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, each insert 82 is provided with a positioning hole 821, and the bottom of the corresponding receiving groove 825 is provided with a corresponding fixing hole (not shown in the figure). The positioning hole 821 is provided in the insert 82, and the fixing hole is provided at the bottom of the receiving groove 825, so that the insert 82 can be fixed in the receiving groove 825 using a fixing member such as a screw.

[0095] For further information, see Figures 16 to 18 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the end of the positioning hole 821 away from the fixing hole has a tapered section 822. Therefore, when the insert 82 is installed in the receiving groove 825 using a fixing member, the tapered section 822 on the positioning member can play an automatic positioning role, which facilitates the installation and fixing of the insert 82.

[0096] For further information, see Figure 3 , Fig. 9 , Figures 16 to 18As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the bottom surface of each receiving groove 825 is flat, and the back surface of each insert 82 is flat. The bottom surface of the receiving groove 825 and the back surface of the insert 82 are both set to be flat, and when the insert 82 is installed in the corresponding receiving groove 825, the insert 82 can be better supported to ensure the stability of the insert 82.

[0097] For further information, see Figure 3 , Fig. 9 , Figures 16 to 18 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the fuel tank blow molding mold 100 further includes an adjustment pad 83 for adjusting the height of each insert 82 in the corresponding receiving groove 825, and each adjustment pad 83 is provided with a through hole 831 at a position corresponding to the positioning hole 821. The adjustment pad 83 is provided so that during production, only one size of insert 82 can be produced, and then the adjustment pad 83 is used to adjust the height of the insert 82 in the corresponding receiving groove 825, which is not only convenient for production and debugging, but also can reduce costs.

[0098] For further information, see Figures 16 to 18 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the shape of the adjustment pad 83 corresponding to each insert 82 matches the shape of the back of the insert 82. When in use, this structure can more stably install and fix the insert 82 in the corresponding accommodating groove 825.

[0099] For further information, see Figures 16 to 18 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the thickness of each adjustment pad 83 is 1-5 mm, so that during trial production, different numbers of adjustment pads 83 can be set on the back of each insert 82 as needed. Preferably, the thickness of the adjustment pad 83 is 3 mm.

[0100] For further information, see Figure 3 and Fig. 9 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the shapes of the inserts 82 are different according to the shape of the contact area of ​​the fuel tank 90 with the vehicle body, such as some inserts 82 are circular, some inserts 82 are length-shaped, and so on.

[0101] For further information, see Figure 3 , Figure 4 and Figure 8As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the first module 20 also includes a tube clamping core pulling mechanism 85, which includes a tube clamping block 86 for molding the oil pipe fixing point on the fuel tank 90, a support 851 for supporting the tube clamping block 86, and a linear actuator 852 for driving the tube clamping block 86 to slide in the support 851. The support 851 is provided with an opening (not shown in the figure), and the tube clamping block 86 is slidably installed in the opening. The first template 21 is provided with a mounting hole 217, and the support 851 is installed in the mounting hole 217. The tube clamping block 86 is detachably connected to the linear actuator 852. Since the fuel tank 90 will be connected to the oil pipe, the pipe clamping block 86 is provided, so that the position of the oil pipe can be formed and fixed on the fuel tank 90; the pipe clamping block 86 is slidably installed on the support 851, and a linear pusher 852 is provided to drive the pipe clamping block 86, so that when the mold is opened, the pipe clamping block 86 can be driven to move by the linear pusher 852, which facilitates the core pulling and demolding of the pipe clamping block 86.

[0102] For further information, see Figure 3 , Figure 4 and Figure 8 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, undercut grooves 861 are respectively provided on both sides of the clamping tube insert 86, and the depth of the undercut grooves 861 ranges from 2 to 3 mm. The undercut grooves 861 are provided on both sides of the clamping tube insert 86 so that when the fuel tank 90 is formed, undercuts can be formed on the fuel tank 90, so that the fuel pipe can be better clamped and fixed. Preferably, the depth of the undercut grooves 861 is 2.5 mm.

[0103] For further information, see Figure 8 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the top of the cross-section of the clamping tube insert 86 is arc-shaped, so that the bottom of the corresponding groove on the molded fuel tank 90 is arc-shaped, so as to better match the fuel pipe.

[0104] For further information, see Figure 8As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, a cooling water flow channel (not shown in the figure) is provided in the tube block 86, a slider 87 is installed in the opening, the slider 87 is detachably connected to the tube block 86, a connecting flow channel 871 respectively connected to both ends of the cooling water flow channel is provided in the slider 87, and a connecting joint (not shown in the figure) is installed on the slider 87 to respectively connect the connecting flow channels 871 and connect external cooling water, the slider 87 is connected to the linear pusher 852, so that the slider 87 is pushed to move by the linear pusher 852, and then the tube block 86 is pushed to move; in addition, a cooling water flow channel is provided in the tube block 86, and a connecting flow channel 871 connected to the cooling water flow channel is provided in the slider 87, so that cooling water can be introduced into the tube block 86, and the tube block 86 can be cooled conveniently for blow molding.

[0105] For further information, see Figure 8 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the linear actuator 852 is a cylinder, and the slider 87 is connected to the piston rod of the cylinder. Of course, in some other embodiments, the linear actuator 852 can also be a linear motor, a cylinder, etc.

[0106] For further information, see Figure 8 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the clamping tube core pulling mechanism 85 also includes a support seat 853, the support seat 853 is installed on the first template 21, and the oil cylinder is installed on the support seat 853. The support seat 853 is provided to facilitate the installation and fixing of the clamping tube core pulling mechanism 85.

[0107] For further information, see Figure 1 , Figure 3 and Fig. 9 As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the first module 20 further includes a first support head 222 connecting the first support plate 221 and the first template 21, and the second module 50 further includes a second support head 522 connecting the second support plate 521 and the second template 51. The first support head 222 and the second support head 522 are provided so as to connect the first support plate 221 with the first template 21 and the second support plate 521 with the second template 51.

[0108] For further information, see Figure 1 , Figure 3 and Fig. 9As a specific embodiment of the fuel tank blow molding mold 100 provided by the present invention, the first module 20 further includes a first dustproof plate 223 covering between the first support plate 221 and the first template 21; the first dustproof plate 223 is provided to reduce the amount of debris falling between the first support plate 221 and the first template 21, thereby better ensuring the parts between the first support plate 221 and the first template 21. Similarly, the second module 50 further includes a second dustproof plate 523 covering between the second support plate 521 and the second template 51; the second dustproof plate 523 is provided to reduce the amount of debris falling between the second support plate 521 and the second template 51, thereby better ensuring the parts between the second support plate 521 and the second template 51.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel tank blow molding mold, comprising a first mold group and a second mold group, wherein the first mold group comprises a first support plate, a first template supported on the first support plate, and a blowing mechanism for blowing gas into a blank, wherein the blowing mechanism is mounted on the first template; the first template is provided with a first inner cavity for molding one side of the fuel tank, the second mold group comprises a second template and a second support plate supporting the second template, the second template is provided with a second inner cavity for molding the other side of the fuel tank, the first inner cavity and the second inner cavity are combined to form a cavity for molding the fuel tank, characterized in that: The fuel tank blow molding mold further comprises a clamping mechanism for clamping and fixing the partition, the clamping mechanism comprises two sets of clamping assemblies arranged opposite to each other, each set of the clamping assemblies comprises a clamping block for abutting against the partition, a push rod for pushing the clamping block to move toward the cavity, and a linear driving structure for driving the push rod to move, the two sets of the clamping assemblies are respectively mounted on the first template and the second template, the first template is provided with a first through hole for the corresponding push rod to pass through, and the second template is provided with a second through hole for the corresponding push rod to pass through; The first template is provided with a positioning structure, and the positioning structure is used to detachably position the iron ring in the first inner cavity, so that during the blow molding process, the iron ring is placed in the blank from the outside of the blank, so that the iron ring is formed on the fuel tank during the cooling molding process; The positioning structure includes a magnetic member for magnetically positioning the iron ring, a support plate, a sleeve installed in the first template, and a push-up cylinder for pushing up the support plate, the magnetic member is installed on the support plate, the support plate is installed in the sleeve, a through hole is opened in the first template, the sleeve is installed in the through hole, and during the blow molding process, the push-up cylinder pushes the support plate to push the iron ring toward the fuel tank so that the iron ring is integrated into the shell of the fuel tank.

2. The fuel tank blow molding mold according to claim 1, characterized in that: Each set of the clamping assemblies also includes a guide frame for guiding the push rod to move, and the guide frame is provided with a guide hole for guiding the push rod to slide. The guide frames of the two sets of the clamping assemblies are respectively fixed on the first template and the second template.

3. The fuel tank blow molding mold according to claim 2, characterized in that: Each set of the clamping assemblies further comprises a guide sleeve, which is sleeved on the push rod. The guide sleeves of the two sets of the clamping assemblies are respectively fixed in the first through hole and the second through hole.

4. The fuel tank blow molding mold according to claim 2, characterized in that: Each of the linear drive structures includes a push-pull lever hinged to the push rod in the middle area, a support block supporting one end of the push-pull lever, and a linear drive for driving the other end of the push-pull lever to swing, the linear drive is hinged to the other end of the push-pull lever, and the support block is hinged to the push-pull lever; the support blocks of the two sets of the linear drive structures are respectively installed on the first template and the second template, and the linear drives of the two sets of the linear drive structures are respectively installed on the first template and the second template.

5. The fuel tank blow molding mold according to claim 4, characterized in that: The linear actuator is a driving cylinder, and one end of the piston rod of the driving cylinder is hinged to the push-pull lever.

6. The fuel tank blow molding mold according to claim 5, characterized in that: Each set of the clamping assembly also includes a pressure block for pressing against the other end of the piston rod of the driving cylinder. The pressure block of the clamping assembly corresponding to the first template is installed on the second template, and the pressure block of the clamping assembly corresponding to the second template is installed on the first template.

7. The fuel tank blow molding mold according to claim 6, characterized in that: A push column for pushing up the piston rod of the corresponding driving cylinder is installed on the pressing block.

8. The fuel tank blow molding mold according to any one of claims 1 to 7, characterized in that: A first parting edge is provided on the first template at the edge of the first inner cavity, a second parting edge is provided on the second template at a position corresponding to the first parting edge, a first corrugated groove is provided on the first template outside the first parting edge, and a second corrugated groove is provided on the second template outside the second parting edge.

9. The fuel tank blow molding mold according to claim 8, characterized in that: The four corners of the first template are respectively provided with first cutting edges extending from the first parting edge to the edge of the first template, and the second template is correspondingly provided with second cutting edges that cooperate with the first cutting edges for cutting.

10. The fuel tank blow molding mold according to any one of claims 1 to 7, characterized in that: The fuel tank blow molding mold also includes a clamping mechanism for clamping the blank head, the clamping mechanism includes a first clamping frame installed on the first template and a second clamping frame for clamping the blank head in cooperation with the first clamping frame, and the second clamping frame is installed on the second template.

Images