A PVC-U ball valve body injection molding device

Abstract

The present invention relates to the field of ball valve injection molding technology, and discloses a PVC-U ball valve body injection molding device, comprising a processing table, wherein the processing table comprises a relatively movable mold and an injection molding machine for injection molding, and a linkage component is installed inside the processing table. The PVC-U ball valve body injection molding device realizes the work of receiving, loading and transporting accessories during the secondary encapsulation process. When the closed mold is opened, the receiving component and the feeding component move forward, and the accessories that need to be loaded are transported by the feeding component, and then the accessories are placed into the molding cavity correspondingly through the feeding component. After waiting for the mold to be merged for injection molding, the mold is opened for the second time and the fully molded valve body is taken out through the receiving component. The whole process reduces manual participation, reduces the possibility of burns, and improves processing efficiency at the same time. The continuity between the device processes is stronger and the user experience is better.

Description

Technical Field

[0001] The invention relates to the technical field of ball valve injection molding, in particular to a PVC-U ball valve body injection molding device. Background Art

[0002] A ball valve is a common type of valve, mainly composed of a valve body, ball, stem, seals, etc. When the ball valve is in the open state, the through hole of the ball coincides with the axis of the pipe, and the fluid can pass through unimpeded; when the ball valve is rotated 90 degrees and is in the closed state, the through hole of the ball is perpendicular to the axis of the pipe, thereby cutting off the flow of fluid. The ball valve body is one of the main components of the ball valve and plays a vital role in the performance and service life of the ball valve. The valve body materials include cast iron, cast steel, stainless steel and plastic.

[0003] In modern industrial production, the demand for PVC-U ball valve bodies is increasing. PVC-U materials are widely used in water supply and drainage fields due to their good corrosion resistance, flame retardancy and low cost. As an important control valve, the quality of the ball valve body directly affects the performance and service life of the ball valve. In terms of manufacturing process, PVC-U ball valve injection molding generally uses two-color injection molding or secondary overmolding to pursue better sealing. Two-color injection molding equipment is expensive, so the secondary overmolding method is used by the majority of manufacturers. The secondary overmolding is to place the formed ball into the injection molding equipment, and the valve body is injection molded on the outside of the ball. The outer shell produced in this way is integrally molded and has a good sealing effect with the internal ball.

[0004] The prior art publication number is CN112476948A, which provides a plastic ball valve production equipment and a production method thereof, including a feeding device, an injection molding device located on one side of the feeding device, a conveying device connected to the injection molding device, and a unloading device located on the same side of the injection molding device as the feeding device. The conveying device reciprocates between the feeding device, the injection molding device and the unloading device to transport materials and products. The valve core and the sealing ring are accurately and automatically loaded through the feeding device. The entire loading process is orderly and fast, thereby reducing the loading time and improving the loading and production efficiency.

[0005] Although the above-mentioned existing technology can use automatic equipment to complete the loading, feeding, injection molding and other processes, the device is complex, the linkage between the links is poor, and multiple independent mechanisms need to cooperate. The number of required driving components is large, the energy consumption is high, the cost is high, and the maintenance is complicated. In addition, the secondary encapsulation process in the existing equipment is to place the required spheres and sealing rings into the injection molding cavity, and then close the mold for injection molding. In this process, the spheres are located on the outside of the two sets of sealing rings, so there is a 1:2 ratio between the spheres and the sealing rings. The loading method in the existing device is to load eight sets of sealing rings at a time. The loading ratio between the sealing rings and the spheres is not mentioned, but there is a risk of dislocation in centralized processing.

[0006] It can be seen that a PVC-U ball valve body injection molding device is needed to solve the problems mentioned in the above background technology, such as the complexity of the device, poor linkage between links, the need for cooperation of multiple independent mechanisms, a large number of required driving elements, high energy consumption, high cost, complex maintenance, and the risk of processing dislocation due to the centralized loading of the ball and the sealing ring, and the lack of loading ratio between the ball and the sealing ring. Summary of the Invention

[0007] The object of the present invention is to provide a PVC-U ball valve body injection molding device to solve the problems of low efficiency and high risk in the secondary encapsulation process of the existing equipment mentioned in the above background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a PVC-U ball valve body injection molding device, comprising a processing table, the processing table including a relatively movable mold and an injection molding machine, and a linkage assembly installed inside the processing table, the linkage assembly driving the two relatively movable molds to open and close, and simultaneously driving the movement of a receiving assembly and a feeding assembly located on both sides of the mold, wherein the receiving assembly is used to unload the material from the molding mold, the feeding assembly is used to alternately transport a ball and a sealing ring, and a loading assembly is installed above the feeding assembly for loading the ball and the sealing ring in proportion;

[0009] The material receiving assembly includes a material taking fixture, and the material taking fixture rotates on one side of the column. The rear side of the material taking fixture is hinged to a hinge plate through a first hinge rod and a second hinge rod. The hinge plate rotates on the rear side of the base. One side of the hinge plate is also connected to a transport belt group. A third hinge rod is connected to the middle position of the transport belt group, and one end of the third hinge rod is hinged to a fourth hinge rod.

[0010] The feeding assembly includes two sets of screw rods, and the outer sides of the screw rods are connected to matching moving blocks. A moving shaft runs through the moving block, and the top end of the moving shaft is connected to a first transport bed of a transport sealing ring. The lower part of the moving shaft is limited by a limiting groove. A second transport bed for transporting balls is provided on one side of the first transport bed.

[0011] The feeding assembly includes an intermediate gear, and three groups of pinion gears are equidistantly meshed on the outside of the intermediate gear. The shaft of the pinion gear passes through the rotating plate and is connected to the first transmission gear, and the second transmission gear is meshed on one side of the first transmission gear. A feeding fixture is provided on one side of the second transmission gear. The number of the first transmission gear, the second transmission gear and the feeding fixture are all three groups. Two of the three groups of feeding fixtures are support ring fixtures, and one group is a ball clamp.

[0012] Preferably, the processing table includes a table plate, the injection molding machine and the mold are both located on the top of the table plate, and the injection molding machine is located on one side of the mold. The injection molding tube of the injection molding machine passes through the mold and extends into the interior thereof, and a molding cavity is provided inside the mold.

[0013] Preferably, the linkage assembly includes a base plate, and the base plate is located inside the table plate, a turntable is provided at the middle position of the top of the base plate, and a motor is installed below the turntable, a crank arm is hinged on one side of the top of the turntable, and the other end of the crank arm is hinged on the hinge end, and the inside of the hinge end is hinged with a first hinge shaft and a second hinge shaft, and the first hinge shaft and the second hinge shaft extend to both sides of the hinge end respectively.

[0014] Preferably, one end of the hinged end is connected to a through shaft, and the through shaft passes through a fixed seat, the fixed seat is fixed on the base plate, the bottom end of the hinged end is provided with a protrusion, and the outer side of the protrusion is provided with a limiting shaft, one end of the limiting shaft is hinged to the base plate, and a limiting groove is provided at a position of the limiting shaft away from the hinged end, and the protrusion moves inside the limiting groove.

[0015] Preferably, a mounting seat is connected above the crank arm above the hinged end, and there are two groups of mounting seats. The two groups of mounting seats are respectively located at the bottom ends of the two groups of molds, and the mounting seats pass through the top of the table and move in the table. There are four groups of hinged ends, wherein the first movable plate and the second movable plate are respectively connected above the two groups of relatively arranged hinged ends, and the first movable plate and the second movable plate are respectively located on both sides of the two groups of molds.

[0016] Preferably, the top of the first movable plate is connected to a column, and an axis passes through the top of the column, and the axis drives the material picking clamp to rotate, the rear side of the axis is connected to a first hinge rod, and the other end of the first hinge rod is hinged to a second hinge rod, the other end of the second hinge rod is hinged to the hinge plate, and a hinge shaft is provided between the bottom of the hinge plate and the base, and the base is fixedly provided on the first movable plate.

[0017] Preferably, the transport belt group is arranged on the inner side of the base, and the transport belt group is located on the front side of the hinged plate. The transport belt group includes a back plate, a belt group and a transport clamp. The back plate is arranged on the front side of the belt group, and the transport clamp is arranged on one side of the upper pulley of the back plate. One end of the third hinged rod is hinged to one side of the belt group, and the belt group and the hinged plate are connected by an axis. A drive motor is installed on the rear side of the fourth hinged rod.

[0018] Preferably, the feeding assembly includes a second movable plate, and a movable motor is installed on the top of the second movable plate, and a gear group is provided at the output end of the movable motor, the gear group includes multiple groups of gears meshing with each other, and the gears located at the end are connected to a screw rod, the number of the screw rods is two groups, and the interiors of the two groups of movable blocks are provided with slide grooves, and the movable shaft passes through the slide grooves and moves inside the slide grooves, the number of the limiting grooves is two groups, and the two groups of limiting grooves include a straight portion and an arc portion, and the movable shaft is located in the straight portion and the arc portion and moves.

[0019] Preferably, the top of the second movable plate is connected to a mounting column, and a feeding motor is installed on the top of the mounting column. The output end of the feeding motor is connected to a rotating plate through a shaft, and a through groove is opened inside the intermediate gear.

[0020] Preferably, the number of the first transmission gear, the second transmission gear and the loading clamps are all three groups, two of the three groups of the loading clamps are support ring clamps, and one group is a ball clamp.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0022] First, the present invention realizes the work of receiving, loading and transporting accessories during the secondary encapsulation process by setting the receiving component, feeding component and loading component. When the closed mold is opened, the receiving component and the feeding component move forward, and the accessories to be loaded are transported by the feeding component. Then, the accessories are placed into the molding cavity by the loading component. After waiting for the mold to be merged and injection molded, the second opening is performed and the fully formed valve body is taken out by the receiving component. The whole process reduces manual participation and reduces the possibility of burns. At the same time, the processing efficiency is improved, the continuity between the device processes is stronger, and the user experience is better.

[0023] Second, the present invention realizes the simultaneous opening and closing of the mold and the movement between the material receiving assembly and the material feeding assembly through the linkage assembly. When the mold is closed, the material receiving assembly and the material feeding assembly on both sides retreat to both sides. When the mold is opened, the material receiving assembly and the material feeding assembly on both sides move closer, which is convenient for loading and receiving materials, and the coordination between the processes is orderly and the linkage between the devices is strong.

[0024] Third, the present invention significantly optimizes the complexity and operating efficiency of traditional injection molding equipment through a highly linked mechanical structure design. Only through the linkage of the feeding component and the loading component, a 2:1 precise ratio of feeding of the sealing ring and the ball valve core can be achieved, ensuring that the sealing rings are assembled on both sides of each ball valve core synchronously to meet the injection molding requirements in the molding cavity. During this process, the device adopts screw drive and gear drive to work together, using a single power source to drive multiple links, greatly reducing the number of independent drive components (such as cylinders and motors) used. Through the one-to-one precise loading mode, the assembly process of each set of valve cores and sealing rings is completed independently, without the need for multiple sets of synchronous alignment operations, which not only avoids the increase in scrap rate caused by material confusion, but also reduces the equipment manufacturing cost. In addition, the device adopts a synchronous linkage design in the mold opening and closing, feeding, and collecting links to further shorten the process interval time, achieving high-precision, low-energy consumption, and low-cost injection molding production. At the same time, through the single-group sequential loading mode, the stability problem of multiple groups of synchronous operations is completely solved, and it has both process reliability and economic advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a cross-sectional view of the present invention;

[0027] Figure 3 This is a schematic diagram of the connection structure of the linkage assembly, the material receiving assembly, the material feeding assembly and the material loading assembly of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection structure of the linkage components of the present invention;

[0029] Figure 5 This is a schematic diagram of the split structure of the linkage components of the present invention;

[0030] Figure 6 This is a schematic diagram of the local structure of the linkage assembly of the present invention;

[0031] Figure 7 This is a schematic diagram of the connection structure of the material receiving component of the present invention;

[0032] Figure 8 This is a schematic diagram of the disassembled structure of the material receiving component of the present invention;

[0033] Figure 9 This is a schematic diagram of the connection structure between the loading assembly and the feeding assembly of the present invention;

[0034] Figure 10 This is a schematic diagram of the disassembled structure of the feeding component of the present invention;

[0035] Figure 11 This is a schematic diagram of the connection structure of the material feeding component of the present invention;

[0036] Figure 12 This is a schematic diagram of the disassembled structure of the feeding assembly of the present invention;

[0037] Figure 13 This is a schematic diagram of the connection structure of the feeding assembly of the present invention.

[0038] 1. Processing table; 101. Table; 102. Injection molding machine; 103. Mold; 2. Linkage assembly; 201. Bottom plate; 202. Turntable; 203. Crank arm; 204. Articulated end; 205. First articulated axis; 206. Second articulated axis; 207. Through axis; 208. Fixed seat; 209. Limit axis; 210. Mounting seat; 3. Material receiving assembly; 301. First movable plate; 302. Column; 303. Material removal fixture; 304. First articulated rod; 305. Second articulated rod; 306. Articulated plate; 307. Base; 308. Transport belt assembly; 309. Back plate; 310. 2. Belt group; 3083. Transport fixture; 309. Third articulated rod; 310. Fourth articulated rod; 311. Drive motor; 4. Feeding assembly; 401. Second movable plate; 402. Moving motor; 403. Gear group; 404. Screw; 405. Moving block; 406. Moving shaft; 407. Limiting groove; 408. First transport bed; 409. Second transport bed; 5. Loading assembly; 501. Mounting column; 502. Loading motor; 503. Intermediate gear; 504. Pinion; 505. Rotating plate; 506. First transmission gear; 507. Second transmission gear; 508. Loading fixture. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1-6 A PVC-U ball valve body injection molding device includes a processing table 1, which includes a relatively movable mold 103 and an injection molding machine 102 for injection molding, and a linkage component 2 is installed inside the processing table 1. The linkage component 2 drives the two sets of relatively movable molds 103 to open and simultaneously drives the material receiving component 3 and the material feeding component 4 located on both sides of the mold 103 to move.

[0041] In this embodiment, a controller is installed in the device, and the controller is electrically connected to the electronic components in the device to facilitate direct control. In this device, the injection molding machine 102 can melt and transport the plastic particles, and then squeeze them into the molding cavity inside the two sets of molds 103. After molding in the molding cavity, the mold is opened. The molding process and equipment are the same as those of the existing injection molding machine. The molding cavity after the two sets of molds 103 are merged has the same structure as the ball valve body. A cooling water channel is provided in the mold 103. After opening, the valve body is formed, and the clamping of the material removal fixture 303 and the transportation fixture 3083 will not damage the valve body. Two sets of sealing rings are first placed in the molding cavity inside the mold 103, and then a sphere is placed inside the two sets of sealing rings. The valve body and the internal sphere, which are coated with rubber on the outside of the sealing ring and the sphere, are separated by coating. The sphere can rotate normally inside to form a rotatable valve core in the ball valve.

[0042] Specifically, the processing table 1 includes a table plate 101, an injection molding machine 102 and a mold 103 are both located on the top of the table plate 101, and the injection molding machine 102 is located on one side of the mold 103. The injection molding tube of the injection molding machine 102 passes through the mold 103 and extends into the interior thereof, and a molding cavity is provided inside the mold 103.

[0043] In this embodiment, a cavity is provided inside the table 101 to facilitate the installation of the linkage component 2. A slide groove is provided at the top of the table 101 to facilitate the movement of the two sets of molds 103 and the first movable plate 301 and the second movable plate 401. A transport belt is also installed on one side of the material receiving component 3 above the table 101, which can transport the removed molded ball valve for unloading, reducing manual participation and forming a complete processing step.

[0044] Specifically, the linkage assembly 2 includes a base plate 201, and the base plate 201 is located inside the table 101. A turntable 202 is provided at the middle position of the top of the base plate 201, and a motor is installed under the turntable 202. A crank arm 203 is hinged on one side of the top of the turntable 202, and the other end of the crank arm 203 is hinged on the hinge end 204. The inside of the hinge end 204 is respectively hinged with a first hinge shaft 205 and a second hinge shaft 206, and the first hinge shaft 205 and the second hinge shaft 206 extend to both sides of the hinge end 204 respectively.

[0045] In this embodiment, the number of the first hinge shaft 205 and the second hinge shaft 206 are two groups, and a total of four groups of hinge shafts form a rectangular structure. The crank arm 203 is located in the middle of the rectangle. A hinge end 204 is provided at the four intersection points of the rectangle, and the rear ends of the four hinge ends 204 are connected to a through shaft 207. Each group of through shafts 207 passes through the corresponding fixed seat 208 and is limited by the corresponding limit shaft 209. The crank arm 203 is hinged at the eccentric point of the turntable 202. With each rotation of the turntable 202, the crank arm 203 is driven to move. One end of the crank arm 203 drives the hinge end 204 to move, so that the through shaft 207 can be extended and retracted inside the fixed seat 208. Two opposite groups of the four groups of hinge ends 204 are provided with mounting seats 210. The two groups of mounting seats 210 are respectively located below the two groups of molds 103. The tops of the other two groups of hinge ends 204 are respectively provided with a first movable plate 301 and a second movable plate 401.

[0046] Specifically, one end of the hinged end 204 is connected to a through shaft 207, and the through shaft 207 passes through the fixed seat 208, and the fixed seat 208 is fixed on the base plate 201. A protrusion is provided at the bottom end of the hinged end 204, and a limiting shaft 209 is provided on the outside of the protrusion. One end of the limiting shaft 209 is hinged to the base plate 201, and a limiting groove is provided at a position of the limiting shaft 209 away from the hinged end, and the protrusion moves inside the limiting groove.

[0047] In this embodiment, the limiting shaft 209 and the limiting groove inside it are used to limit and assist the movement of the through shaft 207. Together, they make the final moving trajectory of the through shaft 207 straight. The bottom ends of the first movable plate 301 and the second movable plate 401 pass through the table 101, so a groove is also provided on the table 101 below the first movable plate 301 and the second movable plate 401 for movement.

[0048] Specifically, a mounting seat 210 is connected above the hinged end 204 and located above the crank arm 203, and there are two groups of mounting seats 210. The two groups of mounting seats 210 are respectively located at the bottom ends of the two groups of molds 103, and the mounting seats 210 pass through the top of the table 101 and move in the table 101. There are four groups of hinged ends 204, among which the first movable plate 301 and the second movable plate 401 are respectively connected above the two groups of oppositely arranged hinged ends 204, and the first movable plate 301 and the second movable plate 401 are respectively located on both sides of the two groups of molds 103.

[0049] In this embodiment, the two sets of molds and the first movable plate 301 and the second movable plate 401 are driven to move by starting the motor under the turntable 202. A worm gear reducer or other device can be installed between the motor and the turntable 202 to control the rotation and prevent reversal. The motor can be a servo motor.

[0050] See also Figure 7-13 , a PVC-U ball valve body injection molding device, the material receiving component 3 is used for unloading the molding die, the material feeding component 4 is used for transporting the ball and the sealing ring, and a loading component 5 for loading the ball and the sealing ring is installed above the material feeding component 4, the material receiving component 3 includes a material picking fixture 303, and the material picking fixture 303 rotates on one side of the column 302, the rear side of the material picking fixture 303 is hinged to a hinge plate 306 through a first hinge rod 304 and a second hinge rod 305, the hinge plate 306 rotates on the rear side of the base 307, and one side of the hinge plate 306 is also connected to a transport belt group 308, and a third hinge rod 309 is connected to the middle position of the transport belt group 308, and one end of the third hinge rod 309 is hinged to a fourth hinge rod 310, The feeding component 4 includes two groups of screw rods 404, and the outer side of the screw rods 404 is connected to the matching moving block 405, a moving shaft 406 passes through the moving block 405, and the top of the moving shaft 406 is connected to the first transport bed 408 of the transport sealing ring, the lower part of the moving shaft 406 is limited by the limiting groove 407, and a second transport bed 409 for transporting spheres is provided on one side of the first transport bed 408, the loading component 5 includes an intermediate gear 503, and three groups of small gears 504 are equidistantly meshed on the outer side of the intermediate gear 503, the shaft of the small gear 504 passes through the rotating plate 505 and is connected to the first transmission gear 506, and the second transmission gear 507 is meshed on one side of the first transmission gear 506, and a loading fixture 508 is provided on one side of the second transmission gear 507.

[0051] In this embodiment, the receiving component 3, the feeding component 4, and the loading component 5 are all controlled separately, that is, the movement of the feeding component 4, the loading of the loading component 5, and the receiving process of the receiving component 3 can be controlled separately. The timing of transportation, loading, and receiving can be adjusted according to actual usage. The device is more flexible. Since the several groups of motors on the first movable plate 301 and the second movable plate 401 need to move, a mobile power supply can be installed on the top of the first movable plate 301 or the second movable plate 401 to provide power to the motor so that it can be used normally.

[0052] Specifically, the top of the first movable plate 301 is connected to the column 302, and an axis passes through the top of the column 302, and the axis drives the material picking clamp 303 to rotate, and the rear side of the axis is connected to the first hinge rod 304, and the other end of the first hinge rod 304 is hinged to the second hinge rod 305, and the other end of the second hinge rod 305 is hinged to the hinge plate 306, and a hinge shaft is provided between the bottom of the hinge plate 306 and the base 307, and the base 307 is fixedly set on the first movable plate 301.

[0053] In this embodiment, the shape of the material picking fixture 303 matches the ball valve after molding, and can be a flexible clamp. The material picking fixture 303 rotates back and forth between a vertical state and a horizontal state. The horizontal state is for conveniently clamping the molded ball valve, and the vertical state is for conveniently transferring the clamped ball valve to the transport fixture 3083. The transport fixture 3083 is also a fixture suitable for clamping the ball valve.

[0054] Specifically, the transport belt group 308 is arranged on the inner side of the base 307, and the transport belt group 308 is located on the front side of the hinged plate 306. The transport belt group 308 includes a back plate 3081, a belt group 3082 and a transport clamp 3083. The back plate 3081 is arranged on the front side of the belt group 3082, and the transport clamp 3083 is arranged on one side of the upper pulley of the back plate 3081. One end of the third hinge rod 309 is hinged to one side of the belt group 3082, and the belt group 3082 and the hinged plate 306 are connected by an axis. The rear side of the fourth hinge rod 310 is equipped with a drive motor 311.

[0055] In this embodiment, a worm gear reducer can be installed between the drive motor 311 and the fourth hinged rod 310 to achieve the function of preventing reversal. When the transport belt group 308 swings as a whole, the pulley below the back plate 3081 is stationary. When swinging, the outer belt will drive the upper pulley to rotate to a certain extent, thereby driving the transport fixture 3083 to rotate to a certain extent, so that the transport fixture 3083 can better remove the formed valve from the material removal fixture 303 and then transport it to the belt conveyor.

[0056] Specifically, the feeding assembly 4 includes a second movable plate 401, and a movable motor 402 is installed on the top of the second movable plate 401, and a gear group 403 is provided at the output end of the movable motor 402. The gear group 403 includes multiple groups of gears that mesh with each other, and the gears at the end are connected to a screw rod 404. There are two groups of screw rods 404. The interiors of the two groups of movable blocks 405 are both provided with slide grooves, and the movable shaft 406 passes through the slide grooves and moves inside them. There are two groups of limiting grooves 407. The two groups of limiting grooves 407 include a straight portion and an arc portion. The movable shaft 406 is located in the straight portion and the arc portion and moves.

[0057] In this embodiment, the gears in the gear set 403 can adjust the direction of rotation, so that the rotation directions of the two sets of screw rods 404 are opposite, and the first transport bed 408 and the second transport bed 409 move in different directions, and the materials are loaded at intervals without being congested at the end of the screw rod 404. The setting of the limit groove 407 makes the movement directions of the first transport bed 408 and the second transport bed 409 not straight, and there are places close to each other and places far away from each other between the two sets of limit grooves 407, which can avoid the first transport bed 408 and the second transport bed 409 from moving in a straight line. When the conveyor bed 409 moves, the limit groove 407 is designed at the end to be an arc close to the middle position of the second movable plate 401, so that the first transport bed 408 and the second transport bed 409 gradually approach the middle position of the second movable plate 401 when they move to the end, which is convenient for the loading fixture 508 to take materials. The first transport bed 408 and the second transport bed 409 can be belt conveyors to facilitate continuous loading. Corresponding limit mechanisms are also provided on the first transport bed 408 and the second transport bed 409, so that the sealing ring and the ball can be placed and transported normally.

[0058] Specifically, the top of the second movable plate 401 is connected to a mounting column 501 , and a feeding motor 502 is installed on the top of the mounting column 501 . The output end of the feeding motor 502 is connected to a rotating plate 505 via a shaft, and a through slot is provided inside the intermediate gear 503 .

[0059] In this embodiment, a mounting plate is provided at the top of the mounting column 501, and the mounting plate is located at the bottom end of the feeding motor 502. The mounting plate is connected to the intermediate gear 503 to provide support for the intermediate gear 503. When the feeding motor 502 is started, it will drive the rotating plate 505 to rotate, but will not drive the intermediate gear 503 to rotate. The three groups of small gears 504 around the intermediate gear 503 rotate around the intermediate gear 503. Because of the mutual meshing relationship, each group of small gears 504 will also rotate, thereby driving the feeding fixture 508 to rotate while driving it.

[0060] Specifically, there are three sets of the first transmission gear 506 , the second transmission gear 507 and the loading fixtures 508 . Two of the three sets of loading fixtures 508 are support ring fixtures, and one set is a ball clamping fixture.

[0061] In this embodiment, two of the three groups of loading fixtures 508 use support ring fixtures to support the sealing ring to take out the material and place it in the corresponding molding cavity. The other group of ball clamping fixtures can be a flexible fixture. After clamping the sphere, it is placed between the two groups of sealing rings inside the molding cavity, and then waits for the mold to be closed for injection molding.

[0062] When in use, it is necessary to connect an external power supply, which provides electrical energy for the device to operate normally. First, the motor in the linkage component 2 is started to drive the turntable 202 to rotate. When the turntable 202 rotates, it will drive the crank arm 203 to move, thereby driving the through shaft 207 to move back and forth inside the fixed seat 208 through the hinged end 204. The first hinged shaft 205 and the second hinged shaft 206 hinged in the hinged end 204 will cooperate with the forward and backward movements of the hinged end 204, causing the four groups of hinged shafts to deform. Whenever the hinged end 204 retreats, the opposite hinged end 204 will also retreat, that is, the two groups of mounting seats 210 at the top will retreat synchronously, and the first movable plate 301 and the second movable plate 306 on the vertical axis of the two groups of mounting seats 210 will also retreat. The two moving plates 401 will approach each other, that is, when the two sets of molds 103 move away from each other, the material receiving components 3 and the material feeding components 4 on both sides will move, and both move toward the position of the mold 103. When the second moving plate 401 moves to the mold opening, the moving motor 402 is started, so that the moving motor 402 drives the gear set 403 to rotate, thereby driving the two sets of screw rods 404 to rotate. The rotation directions of the two sets of screw rods 404 are opposite, and then drive the movement directions of the two sets of moving blocks 405 in opposite directions, so that the corresponding first transport bed 408 and second transport bed 409 on the moving block 405 can feed materials at intervals. When the first transport bed 408 moves with the movement of the moving block 405, the moving shaft 406 on one side also moves together. The first transmission gear 506 drives the second transmission gear 507 meshing with it to rotate, thereby driving the loading fixture 508 to rotate. The three sets of loading fixtures 508 will also revolve around the orbital motion while rotating. The two sets of support ring clamps take turns to open the sealing ring on the first transport bed 408, rotate and transport it, and place the sealing ring in the mold cavity. After the sealing ring is loaded, the first transport bed 408 retreats and the second transport bed 409 moves to one end of the screw rod 404. Then the remaining set of ball clamps clamps the ball transported on the second transport bed 409 and transports it, and places it on the outside of the sealing ring in the mold cavity. After placement, the bottom plate 201 continues to rotate, and the two sets of molds are closed. The first movable plate 301 and the second movable plate 401 retreat to both sides, and the injection molding machine 102 injects the valve body into the mold 103. The valve body is formed in the mold cavity. After molding, the mold is opened, and the first movable plate 301 and the second movable plate 401 move to both sides of the mold opening, and the drive motor 311 is started.The driving motor 311 drives the fourth hinge rod 310 to rotate, and the fourth hinge rod 310 drives the hinge plate 306 and the transport belt group 308 to swing together through the third hinge rod 309. The rotation of the hinge plate 306 drives the material picking clamp 303 to rotate through the second hinge rod 305 and the first hinge rod 304, so that the material picking clamp 303 changes from a vertical state to a horizontal state, which is convenient for clamping the forming mold in the mold cavity. As the driving motor 311 continues to rotate, the material picking clamp 303 will drive the clamped mold to rotate to a vertical state. At this time, the transport belt group 308 swings to the side close to the material picking clamp 303, and uses the transport clamp 3083 to clamp the mold clamped in the material picking clamp 303. The material picking clamp 303 is released, and the mold is transported to the other side by the transport clamp 3083 and placed on the transport belt to complete the unloading.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present application. The scope of this application is defined by the appended claims and their equivalents.

Claims

1. A PVC-U ball valve body injection molding device, including a processing table, characterized by: The processing table includes a relatively movable mold and an injection molding machine for injection molding, and a linkage assembly is installed inside the processing table. The linkage assembly drives the two sets of relatively movable molds to open and close, and at the same time drives the receiving assembly and the feeding assembly located on both sides of the mold to move. The receiving assembly is used to unload the materials from the molding mold, and the feeding assembly is used to alternately transport the spheres and the sealing rings. A loading assembly is installed above the feeding assembly for loading the spheres and the sealing rings in proportion. The material receiving assembly includes a material taking fixture, and the material taking fixture rotates on one side of the column. The rear side of the material taking fixture is hinged to a hinge plate through a first hinge rod and a second hinge rod. The hinge plate rotates on the rear side of the base. One side of the hinge plate is also connected to a transport belt group. A third hinge rod is connected to the middle position of the transport belt group, and one end of the third hinge rod is hinged to a fourth hinge rod. The feeding assembly includes two sets of screw rods, and the outer sides of the screw rods are connected to matching moving blocks. A moving shaft runs through the moving block, and the top end of the moving shaft is connected to a first transport bed of a transport sealing ring. The lower part of the moving shaft is limited by a limiting groove. A second transport bed for transporting balls is provided on one side of the first transport bed. The feeding assembly includes an intermediate gear, and three groups of pinion gears are equidistantly meshed on the outside of the intermediate gear. The shaft of the pinion gear passes through the rotating plate and is connected to the first transmission gear, and the second transmission gear is meshed on one side of the first transmission gear. A feeding fixture is provided on one side of the second transmission gear. The number of the first transmission gear, the second transmission gear and the feeding fixture are all three groups. Two of the three groups of feeding fixtures are support ring fixtures, and one group is a ball clamp.

2. A PVC-U ball valve body injection molding device according to claim 1, characterized in that: The processing table includes a table plate, the injection molding machine and the mold are both located on the top of the table plate, and the injection molding machine is located on one side of the mold. The injection molding tube of the injection molding machine passes through the mold and extends into the interior thereof, and a molding cavity is provided inside the mold.

3. A PVC-U ball valve body injection molding device according to claim 2, characterized in that: The linkage assembly includes a base plate, and the base plate is located inside the table plate. A turntable is provided at the middle position of the top of the base plate, and a motor is installed below the turntable. A crank arm is hinged on one side of the top of the turntable, and the other end of the crank arm is hinged on the hinge end. The inside of the hinge end is hinged with a first hinge shaft and a second hinge shaft, and the first hinge shaft and the second hinge shaft extend to both sides of the hinge end respectively.

4. A PVC-U ball valve body injection molding device according to claim 3, characterized in that: One end of the hinged end is connected to a through shaft, and the through shaft passes through a fixed seat, and the fixed seat is fixed on the base plate, a protrusion is provided at the bottom end of the hinged end, and a limiting shaft is provided on the outside of the protrusion, one end of the limiting shaft is hinged to the base plate, and a limiting slot is provided at a position of the limiting shaft away from the hinged end, and the protrusion moves inside the limiting slot.

5. The PVC-U ball valve body injection molding device according to claim 4, characterized in that: A mounting seat is connected above the crank arm above the hinged end, and there are two groups of mounting seats. The two groups of mounting seats are respectively located at the bottom ends of the two groups of molds, and the mounting seats pass through the top of the table and move in the table. There are four groups of hinged ends, and the first movable plate and the second movable plate are respectively connected above the two groups of oppositely arranged hinged ends. The first movable plate and the second movable plate are respectively located on both sides of the two groups of molds.

6. The PVC-U ball valve body injection molding device according to claim 5, characterized in that: The top of the first movable plate is connected to a column, and a shaft passes through the top of the column, and the shaft drives the material picking clamp to rotate, the rear side of the shaft is connected to a first hinge rod, and the other end of the first hinge rod is hinged to a second hinge rod, the other end of the second hinge rod is hinged to the hinge plate, and a hinge shaft is provided between the bottom of the hinge plate and the base, and the base is fixedly provided on the first movable plate.

7. The PVC-U ball valve body injection molding device according to claim 6, characterized in that: The transport belt group is arranged on the inner side of the base, and the transport belt group is located on the front side of the hinged plate. The transport belt group includes a back plate, a belt group and a transport clamp. The back plate is arranged on the front side of the belt group, and the transport clamp is arranged on one side of the upper pulley of the back plate. One end of the third hinged rod is hinged to one side of the belt group, and the belt group and the hinged plate are connected by an axis. A drive motor is installed on the rear side of the fourth hinged rod.

8. The PVC-U ball valve body injection molding device according to claim 1, characterized in that: The feeding assembly includes a second movable plate, and a movable motor is installed at the top of the second movable plate, and a gear group is provided at the output end of the movable motor, the gear group includes multiple groups of gears meshing with each other, and the gears at the end are connected with screw rods, and there are two groups of screw rods. The interiors of the two groups of movable blocks are provided with slide grooves, and the movable shaft passes through the slide grooves and moves inside the slide grooves. There are two groups of limiting grooves, and the two groups of limiting grooves include straight portions and arc portions. The movable shaft is located in the straight portions and the arc portions and moves.

9. The PVC-U ball valve body injection molding device according to claim 8, characterized in that: The top of the second movable plate is connected to a mounting column, and a feeding motor is installed on the top of the mounting column. The output end of the feeding motor is connected to the rotating plate through a shaft, and a through slot is opened inside the intermediate gear.

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