Blow molding oil tank threaded opening demolding mechanism

Abstract

The invention provides a blow molding oil tank threaded opening demolding mechanism which comprises a cavity plate, a core plate and an oil tank product, a through mounting hole is formed in the position, corresponding to a threaded opening of the oil tank product, of the cavity plate, a flange sleeve is connected into the mounting hole, a rotary threaded demolding mechanism is arranged on the outer side of the cavity plate, and the rotary threaded demolding mechanism comprises a fixing plate. The fixing plate is connected with an oil cylinder, the oil cylinder is connected with a rack through a piston rod, the rack slides in a guiding mode in the length direction of the oil cylinder through a sliding block and sliding groove structure, the fixing plate is connected with a transmission gear meshed with the rack, and a transmission shaft is installed in the flange sleeve through a bearing. A threaded cup is connected to the bottom of the transmission shaft, and internal threads are arranged on the inner side face of the threaded cup and correspond to external threads at a threaded opening of the oil tank product. During mold opening, an oil tank product is smoothly separated through rotation, and the integrity of a threaded opening of the oil tank is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the field of blow molding molds, in particular to a blow molding oil tank threaded port demoulding mechanism. Background Art

[0002] The current era is a period of rapid development of automotive molds, which emphasizes the concepts of high efficiency, accuracy and cost reduction. The realization of automated production of molds is the most direct manifestation of improving the production capacity of parts, so in the process of mold design and manufacturing, we must consider parts, standardization, interchangeability and substitution, and avoid the original non-standard single-piece production mode.

[0003] The fuel tank is an important part of the car. It is generally produced by blow molding. The threaded structure on the top of the fuel tank is not easy to demould due to the existence of the threaded structure. In the past, the outer surface of this part was directly smooth during blow molding, and no external threads were set. After the blow-molded product is taken out, the threads are machined separately. This method increases the production cycle and the production cost of one more process. Summary of the invention

[0004] In view of the above problems, the present invention aims to provide a blow molding oil tank threaded port demolding mechanism, which has a special rotating thread demolding structure on the cavity plate of the blow molding mold, which rotates away from the oil tank while the mold is opened, effectively ensuring the integrity of the oil tank threaded port.

[0005] The technical solution of the present invention is a blow molding oil tank threaded port demoulding mechanism, comprising a cavity plate, a core plate and an oil tank product, characterized in that: the cavity plate is provided with a penetrating mounting hole at a position corresponding to the threaded port of the oil tank product, a flange sleeve is connected in the mounting hole, a rotary thread demoulding mechanism is provided on the outer side of the cavity plate, the rotary thread demoulding mechanism comprises a fixed plate, an oil cylinder is connected to the fixed plate, the oil cylinder is connected to a rack through a piston rod, the rack is guided to slide along the length direction of the oil cylinder through a slider slide groove structure, and the fixed plate is connected to the rack The transmission gear is meshed, and a transmission shaft is installed inside the flange sleeve through a bearing. A transmission shaft gear meshing with the transmission gear is provided on the upper part of the transmission shaft. A threaded cup is connected to the bottom of the transmission shaft, and an internal thread is provided on the inner side of the threaded cup. The internal thread corresponds to the external thread at the threaded mouth of the oil tank product. When the mold is opened, the oil cylinder is started synchronously, and the transmission gear is driven to rotate through the sliding of the rack, and then the transmission shaft gear is driven to rotate to drive the transmission shaft to rotate, so that the threaded cup is disengaged from the threaded mouth of the oil tank product along the reverse rotation of the thread, and finally the oil tank product is smoothly removed.

[0006] Preferably, a cooling water tank is provided at the bottom of the transmission shaft, and circulating cooling water is provided in the cooling water tank.

[0007] Preferably, a boss extends outward from the bottom of the transmission shaft, the cooling water trough is opened at the boss of the transmission shaft, a connecting platform extends inward from the inner side of the threaded cup, the connecting platform is located on the bottom surface of the boss, a flange is provided under the connecting platform, and the screws pass through the flange to press the connecting platform to the bottom surface of the boss and then connect to the threaded hole at the bottom of the boss.

[0008] Preferably, a rectangular groove is provided on the outer wall of the oil cylinder, and pressure strips are connected to the upper and lower sides of the rectangular groove. The inner side of the pressure strip extends to the rectangular groove. Rectangular grooves that pass through the left and right sides are provided on the upper and lower sides of the rack along the length direction. The rear part of the rack is inserted into the rectangular groove of the oil cylinder, and the pressure strip is inserted into the rectangular grooves on the upper and lower sides of the rack, so that the rack can slide left and right relative to the oil cylinder and the pressure strip.

[0009] Preferably, the piston rod of the oil cylinder is connected to the end of the rack through a connecting block.

[0010] Preferably, the transmission gear is a gear shaft structure, the upper and lower ends of the gear shaft are connected to the fixed plate through bearings, the upper and lower parts of the gear shaft are respectively provided with a first transmission gear and a second transmission gear, the first transmission gear is meshed with the rack, and the second transmission gear is meshed with the transmission shaft gear.

[0011] The present invention arranges a special rotating thread demoulding structure on the outer side of the cavity plate of the blow mold. When the cavity plate and the core plate are opened, the rotating thread demoulding structure is separated from the threaded opening of the oil tank through internal transmission rotation, thereby smoothly opening the mold and effectively ensuring the integrity of the threaded opening of the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another perspective; Figure 3 It is a schematic diagram of the structure of the rotary thread demoulding mechanism of the present invention after being taken out; Figure 4 It is a structural schematic diagram of the rotary thread demoulding mechanism and the oil tank product of the present invention; Figure 5 A top view of the present invention; Figure 6 for Figure 5 Cross-sectional view along AA direction; Among them: 1—cavity plate; 2—oil tank product; 3—mounting hole; 4—flange sleeve; 5—rotating thread demoulding mechanism; 51—fixed plate; 52—oil cylinder; 53—rack; 54—transmission gear; 55—bearing; 56—transmission shaft; 561—boss; 57—transmission shaft gear; 58—threaded cup; 581—connecting platform; 59—flange; 510—pressure strip; 511—connecting block; 512—second transmission gear. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] like Figures 1 to 6 As shown, the present invention provides a blow molding oil tank threaded port demoulding mechanism, comprising a cavity plate 1, a core plate and an oil tank product 2, wherein the cavity plate 1 is provided with a penetrating mounting hole 3 at a position corresponding to the threaded port of the oil tank product 2, wherein a flange sleeve 4 is connected in the mounting hole 3, and a rotary thread demoulding mechanism 5 is provided on the outer side of the cavity plate 1, wherein the rotary thread demoulding mechanism 5 comprises a fixed plate 51, wherein an oil cylinder 52 is connected to the fixed plate 51, wherein the oil cylinder 52 is connected to a rack 53 through a piston rod, wherein the rack 53 is guided to slide along the length direction of the oil cylinder 52 through a slider slot structure, and wherein a transmission gear meshing with the rack 53 is connected to the fixed plate 51 Wheel 54, a transmission shaft 56 is installed inside the flange sleeve 4 through a bearing 55, a transmission shaft gear 57 meshing with the transmission gear 54 is provided on the upper part of the transmission shaft 56, and a threaded cup 58 is connected to the bottom of the transmission shaft 56, and an internal thread is provided on the inner side of the threaded cup 58, which corresponds to the external thread at the threaded mouth of the oil tank product 2; when the mold is opened, the oil cylinder 52 is started synchronously, and the transmission gear 54 is driven to rotate by sliding through the rack 53, and then the transmission shaft gear 57 is driven to rotate to drive the transmission shaft 56 to rotate, so that the threaded cup 58 is disengaged from the threaded mouth of the oil tank product 2 along the reverse rotation of the thread, and finally the oil tank product 2 is smoothly removed.

[0015] In the above solution, a cooling water tank is provided at the bottom of the transmission shaft 56, and circulating cooling water is provided in the cooling water tank.

[0016] Specifically, a boss 561 extends outward from the bottom of the transmission shaft 56, the cooling water trough is opened at the boss 561 of the transmission shaft 56, and a connecting platform 581 extends inward from the inner side of the threaded cup 58. The connecting platform 581 is located on the bottom of the boss. A flange 59 is provided below the connecting platform 581. The screws pass through the flange 59 to press the connecting platform 581 to the bottom of the boss 561 and then are connected to the threaded hole at the bottom of the boss 561.

[0017] In addition, a rectangular groove is provided on the outer wall of the oil cylinder 52, and a pressure strip 510 is connected to the upper and lower sides of the rectangular groove. The inner side of the pressure strip 510 extends to the rectangular groove. The upper and lower sides of the rack 53 are provided with rectangular grooves that pass through the left and right sides along the length direction. The rear part of the rack 53 is inserted into the rectangular groove of the oil cylinder 52, and the pressure strip 510 is inserted into the rectangular grooves on the upper and lower sides of the rack 53, so that the rack 53 can be guided to slide left and right relative to the oil cylinder 52 and the pressure strip 510.

[0018] Specifically, the piston rod of the oil cylinder 52 is connected to the end of the rack 53 through a connecting block 511 .

[0019] Furthermore, the transmission gear 54 is a gear shaft structure, and the upper and lower ends of the gear shaft are connected to the fixed plate 51 through bearings. The upper and lower parts of the gear shaft are respectively provided with a transmission gear 54 and a second transmission gear 512. The first transmission gear is meshed with the rack 53, and the second transmission gear 512 is meshed with the transmission shaft gear 57.

[0020] The present invention starts the oil cylinder 52 synchronously when the cavity plate 1 and the core plate are opened, and the piston rod of the oil cylinder 52 extends out through the connecting block 511 to drive the rack 53 to slide. The rack 53 is guided in a straight line under the cooperation of the pressure strip 510, the rectangular groove of the oil cylinder 52, and the rectangular groove of the rack 53. The rack 53 drives the transmission gear 54 to rotate. The transmission gear 54 and the gear shaft are synchronized and mesh with the transmission shaft gear 57 through the second transmission gear 512 below, and then drives the transmission shaft 56 to rotate through the transmission shaft gear 57, and finally drives the threaded cup 58 to rotate in the opposite direction. The internal thread of the threaded cup 58 is rotated relative to the threaded mouth of the oil tank product 2 to loosen and withdraw until it falls off, so that the oil tank product 2 can fall off smoothly.

[0021] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A blow-molded oil tank threaded port demoulding mechanism, comprising a cavity plate (1), a core plate and an oil tank product (2), characterized in that: The cavity plate (1) is provided with a through mounting hole (3) at a position corresponding to the threaded opening of the oil tank product (2), the mounting hole (3) being connected to a flange sleeve (4), the outer side of the cavity plate (1) being provided with a rotary thread demoulding mechanism (5), the rotary thread demoulding mechanism (5) comprising a fixed plate (51), the fixed plate (51) being connected to an oil cylinder (52), the oil cylinder (52) being connected to a rack (53) via a piston rod, the rack (53) being guided to slide along the length direction of the oil cylinder (52) via a slider slot structure, the fixed plate (51) being connected to a transmission gear (54) meshing with the rack (53), the interior of the flange sleeve (4) being connected via a bearing ( 55) is installed with a transmission shaft (56), the upper part of the transmission shaft (56) is provided with a transmission shaft gear (57) meshing with the transmission gear (54), the bottom of the transmission shaft (56) is connected with a threaded cup (58), the inner side surface of the threaded cup (58) is provided with an internal thread, and the internal thread corresponds to the external thread at the threaded opening of the oil tank product (2); when the mold is opened, the oil cylinder (52) is started synchronously, and the transmission gear (54) is driven to rotate by sliding through the rack (53), and then the transmission shaft gear (57) is driven to rotate to drive the transmission shaft (56) to rotate, so that the threaded cup (58) is disengaged from the threaded opening of the oil tank product (2) along the reverse rotation of the thread, and finally the oil tank product (2) is smoothly detached.

2. A blow molding oil tank threaded port demoulding mechanism according to claim 1, characterized in that: A cooling water tank is provided at the bottom of the transmission shaft (56), and circulating cooling water is provided in the cooling water tank.

3. A blow molding oil tank threaded port demoulding mechanism according to claim 2, characterized in that: A boss (561) extends outward from the bottom of the transmission shaft (56); the cooling water trough is arranged at the boss (561) of the transmission shaft (56); a connecting platform (581) extends inward from the inner side of the threaded cup (58); the connecting platform (581) is located at the bottom of the boss; a flange (59) is arranged below the connecting platform (581); a screw passes through the flange (59) to press the connecting platform (581) onto the bottom of the boss (561) and then connects to a threaded hole at the bottom of the boss (561).

4. A blow-molded oil tank threaded port demoulding mechanism according to claim 1, characterized in that: The outer wall of the oil cylinder (52) is provided with a rectangular groove, and the upper and lower sides of the rectangular groove are connected to a pressure strip (510), and the inner side of the pressure strip (510) extends to the rectangular groove. The upper and lower sides of the rack (53) are provided with rectangular grooves that pass through the left and right sides along the length direction. The rear part of the rack (53) is inserted into the rectangular groove of the oil cylinder (52), and the pressure strip (510) is inserted into the rectangular grooves of the upper and lower sides of the rack (53), so that the rack (53) can slide left and right relative to the oil cylinder (52) and the pressure strip (510).

5. A blow-molded oil tank threaded port demoulding mechanism according to claim 4, characterized in that: The piston rod of the oil cylinder (52) is connected to the end of the rack (53) via a connecting block (511).

6. A blow-molded oil tank threaded port demoulding mechanism according to claim 1, characterized in that: The transmission gear (54) is a gear shaft structure, the upper and lower ends of the gear shaft are connected to the fixed plate (51) through bearings, the upper and lower parts of the gear shaft are respectively provided with a first transmission gear and a second transmission gear (512), the first transmission gear is meshed with the rack (53), and the second transmission gear (512) is meshed with the transmission shaft gear (57).

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