Thermoplastic injection molding equipment and process for fluoroplastic-lined valve

Abstract

The invention discloses fluoroplastic lining valve thermoplastic injection molding equipment and process, and relates to the technical field of injection molding equipment, the fluoroplastic lining valve thermoplastic injection molding equipment comprises a valve body, a mold and an injection molding machine body, the valve body is assembled in the mold, the valve body and the mold form a mold cavity for containing fluoroplastic, the injection molding machine body is used for heating the fluoroplastic to a molten state and transferring the fluoroplastic to the mold cavity, and the injection molding machine further comprises a mold closing structure; the driving structure drives the movable mold plate to drive the fixed mold plate to move, a one-way transmission mechanism of the feeding structure is combined to achieve automatic conveying of the valve body, the rolling contact design of the clamping structure is combined, the position of the valve body is automatically adjusted under the action of gravity when the valve body is clamped, and therefore the stability of the valve body in the injection molding process is improved, and the production efficiency is improved. The influence of relative position deviation of the valve body on the product quality of the fluorine lining is avoided, and in the process, the close fit between the valve body and the movable mold and between the valve body and the fixed mold is further ensured by utilizing the structural characteristics of flange connecting holes in the two sides of the valve body, the gravity center position and the like.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to a thermoplastic injection molding equipment and process for a fluorine-lined plastic valve. Background Art

[0002] The traditional manufacturing process of fluoroplastic-lined valves mainly includes mechanical processing, coating or bonding of lining materials, etc. However, these methods have problems such as low production efficiency, high cost, and unstable quality. In particular, during the coating or bonding process of fluoroplastics, defects such as uneven thickness and poor adhesion are prone to occur, which directly affect the service life and reliability of fluoroplastic-lined valves. In order to overcome the shortcomings of the above traditional processes, thermoplastic injection molding technology has been introduced into the manufacturing of fluoroplastic-lined valves as an efficient and high-quality production method.

[0003] Thermoplastic injection molding technology uses specific injection molding equipment to inject plastic materials that have been preheated to a molten state into a mold, and after cooling and solidification, it forms the desired part shape. In the manufacturing process of fluoroplastic-lined valves, the use of thermoplastic injection molding technology can effectively solve the problem of bonding strength between fluoroplastics and metal substrates, and improve the corrosion resistance and sealing performance of the product. In addition, thermoplastic injection molding technology also has the advantages of short production cycle, high production efficiency, and stable product quality, which is of great significance to improving the overall quality of fluoroplastic-lined valves.

[0004] The patent application with publication number CN113021755A discloses a method for producing a fluorine-lined valve, comprising the following steps:

[0005] Step one: process the valve body shell to the required size; Step two: press the valve body shell processed in step one; In this invention, the valve body shell and the plastic particles are heated separately, the valve body shell is heated in an oven, and the plastic particles are heated in an injection molding machine, reducing the original overall processing time from 4-6 hours to 1 hour, greatly shortening the heating time and improving work efficiency while ensuring quality.

[0006] However, the existing thermoplastic injection molding equipment for fluorine-lined plastic valves still has some shortcomings. Traditional injection molding equipment usually requires manual assembly and disassembly of molds, which is not only time-consuming and labor-intensive, but also easily affected by the operator's skill level, resulting in low production efficiency. During the manual assembly of the mold, the operator needs to accurately align the various parts of the mold to ensure that they are installed correctly. This not only increases the operation time, but may also cause mold damage or assembly errors due to improper operation. In addition, the injection molding process requires multiple manual interventions, such as the initial positioning of the valve body, the assembly of the mold, the injection of the injection material, and the final cooling and curing. Each step requires manual operation, which greatly prolongs the production cycle.

[0007] To this end, the present invention proposes a fluorine-lined plastic valve thermoplastic injection molding equipment and process to solve the above problems. Summary of the invention

[0008] In view of the above problems in the prior art, the present invention is proposed.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a thermoplastic injection molding device for fluoroplastic-lined valves, comprising a valve body, a mold and an injection machine body, wherein the valve body is assembled in the mold and forms a cavity with the mold for accommodating fluoroplastics, the injection machine body is used to heat the fluoroplastics to a molten state and transfer it to the cavity, and also comprises a clamping structure, wherein the clamping structure comprises a mounting plate group, a driving assembly and a positioning assembly, wherein the driving assembly comprises a driving structure and a cylinder, wherein the mounting plate group comprises a movable template, a fixed template and two groups of core seats, wherein the positioning assembly comprises a clamping structure, a feeding structure and an adjustment structure, wherein the feeding structure is arranged in the clamping structure and connected to the movable template, wherein the driving structure drives the movable template to move close to or away from the fixed template to press or release the valve body, and synchronously drives the feeding structure to rotate and feed, wherein the adjustment structure is arranged on the fixed template, wherein the adjustment structure and the cylinder jointly drive the two groups of core seats to move toward or away from each other along the valve stem hole of the valve body, and wherein the adjustment structure synchronously adjusts the clamping gap of the clamping structure to release or clamp the valve body.

[0010] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment of the present invention, the mold comprises a movable mold, a fixed mold and a mold core, and the movable mold, the fixed mold and the mold core are arranged in a one-to-one correspondence with the movable mold plate, the fixed mold plate and the mold core seat;

[0011] The outer edge of the fixed mold is evenly provided with a plurality of shrinking columns adapted to the flange connection holes of the valve body, and a positioning block adapted to the inner cavity of the movable mold is provided at the center of the fixed mold. The positioning block extends toward the movable mold, and the mouth gradually shrinks as it extends.

[0012] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment described in the present invention, the clamping structure includes a guide bar and two groups of clamps sliding on the guide bar, the clamp includes a support unit and a clamping unit, a group of support bars are arranged in the clamping unit, and the clamping unit is rotated through the support bar to adjust the angle of the support unit.

[0013] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment of the present invention, wherein: the clamping unit comprises a rectangular frame plate, a plurality of ball assemblies are arranged inside the rectangular frame plate, and a limiting piece for limiting is fixed at the end of the ball assembly passing through the rectangular frame plate;

[0014] The support unit comprises a horizontal telescopic plate and a support plate group. The support plate group is vertically inserted into the horizontal telescopic plate, and the support plate group is sleeved on the surface of the support bar.

[0015] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment described in the present invention, the feeding structure includes a wheel axle fixed on a horizontal telescopic plate, a ratchet is fixed on the wheel axle, and a rotating structure is provided on both sides of the ratchet, the ratchet is rotated by an external force to act on the wheel axle, driving the rotating structure to rotate.

[0016] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment described in the present invention, the feeding structure also includes a ratchet, which is hinged to the surface of the movable template, and the driving structure drives the movable template to move close to the fixed template so that the ratchet is engaged in the tooth groove of the ratchet wheel, driving the ratchet wheel to rotate.

[0017] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment of the present invention, wherein: the adjustment structure includes two groups of adjustment units, and a cylindrical gear is arranged between the two groups of the adjustment units, and the two groups of the adjustment units move toward or away from each other through the cylindrical gear;

[0018] The adjusting unit comprises a pushing plate and a transmission plate, wherein the transmission plate is connected to two sides of the pushing plate, and the cylinder drives the pushing plate to move through a core seat so as to drive the transmission plate to mesh with the cylindrical gear.

[0019] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment of the present invention, two groups of guide plate groups are fixed on the surface of the push plate, the two groups of guide plate groups include two groups of parallel guide plates, and the two groups of guide plates are clamped on the horizontal telescopic plate.

[0020] As a preferred solution of the fluorine-lined plastic valve thermoplastic injection molding equipment of the present invention, it further comprises a frame structure, the driving structure is mounted on the frame structure, the number of the driving structures is two groups, the two groups of driving structures jointly drive the moving plate to move, and the driving structure comprises a limit seat and a worm;

[0021] The movable mold side blocks are fixed on both sides of the movable mold plate, and the fixed mold side blocks are fixed on both sides of the fixed mold plate. The worm is supported by the fixed mold side blocks and the limit seats. The worm is inserted into the movable mold side blocks and drives the movable mold side blocks to move by rotating.

[0022] A fluorine-lined plastic valve thermoplastic injection molding process is implemented based on the above-mentioned fluorine-lined plastic valve thermoplastic injection molding equipment, and the process includes the following steps:

[0023] S1: Determine the positions of the movable mold, the fixed mold and the mold core, and transport the valve body to the bottom of the clamping structure, and set a magnetic suction block to absorb the valve body;

[0024] S2: Start the driving structure, so that the movable platen drives the movable mold to approach the fixed mold, the pawl is engaged in the tooth groove of the ratchet wheel, and the ratchet wheel is driven to rotate. The rotation of the ratchet wheel drives the wheel shaft and the rotating structure to rotate synchronously, and the magnetic suction block rotates to convey the valve body to the two sets of clamps, and the driving structure continues to drive the movable platen to move;

[0025] S3: The valve body falls into the two sets of clamps and automatically adjusts its position under gravity. The driving structure continues to drive the movable mold plate to move forward, the horizontal telescopic plate is forced to shrink, and the push plate is driven to move through the cylinder and the core seat to drive the transmission plate to engage with the cylindrical gear. The two sets of adjustment units move toward each other through the cylindrical gears. The two sets of adjustment units moving toward each other drive the two sets of clamps to close together and lift the valve body. The valve body enters the movable mold insertion range. The movable mold is inserted into the valve body. The adapter cavity inside the movable mold is aligned with the positioning block in the fixed mold. At the same time, the two sets of core seats drive the mold core to move along the valve stem hole of the valve body until it is against the movable mold.

[0026] S4: Start the injection molding machine body, heat the fluoroplastic to a molten state, and transfer it to the mold cavity through the injection molding machine body. The molten fluoroplastic is cooled and solidified in the mold cavity to form a fluorine lining.

[0027] The beneficial effects of the present invention are as follows: the present invention drives the movable mold plate through the driving structure to drive the fixed mold plate to move, and combines the one-way transmission mechanism of the feeding structure to realize automatic transportation of the valve body, thereby reducing the time of manual handling and speeding up the production rhythm. At the same time, the rolling contact design of the clamping structure is combined, so that the valve body automatically adjusts its position under the action of gravity when clamped, ensuring that the center of gravity of the valve body is located on the center line of the valve stem hole, thereby improving the stability of the valve body during the injection molding process and avoiding the impact of the relative position deviation of the valve body on the product quality of the fluorine lining. In addition, combined with the adaptive positioning between the movable mold and the fixed mold, the precise docking of the movable mold and the fixed mold is ensured. In this process, the structural features such as the flange connection holes and the center of gravity position on both sides of the valve body are utilized to further ensure the close fit between the valve body, the movable mold and the fixed mold, thereby improving the accuracy of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of a fluorine-lined plastic valve thermoplastic injection molding device of the present invention;

[0030] Figure 2It is a schematic diagram of the overall structure of the injection molding machine body in the present invention;

[0031] Figure 3 It is a schematic diagram of the overall structure of the movable template in the present invention;

[0032] Figure 4 It is a schematic diagram of the overall structure of the core seat in the present invention;

[0033] Figure 5 It is a schematic diagram of the overall structure of the mold in the present invention;

[0034] Figure 6 It is a schematic diagram of the overall structure of the fixed mold in the present invention;

[0035] Figure 7 It is a schematic diagram of the overall structure of the sub-runner in the present invention;

[0036] Figure 8 It is a schematic diagram of the overall structure of the framework structure in the present invention;

[0037] Fig. 9 It is a structural schematic diagram of the movable mold in the present invention;

[0038] Fig.10 It is a schematic diagram of the overall structure of the adjustment structure in the present invention;

[0039] Fig.11 It is a schematic diagram of the overall structure of the clamping structure in the present invention;

[0040] Fig.12 It is a schematic diagram of the overall structure of the clamping unit in the present invention;

[0041] Fig.13 It is a schematic diagram of the overall structure of the regulating unit in the present invention;

[0042] Fig.14 It is a schematic diagram of the overall structure of the feeding structure in the present invention.

[0043] Figure numerals: 100, frame structure; 200, injection molding machine body; 300, mounting plate group; 310, movable mold plate; 311, movable mold side block; 312, triangular support seat; 313, clamping seat; 320, fixed mold plate; 321, fixed mold side block; 330, core seat; 400, driving structure; 401, driving motor; 402, belt; 403, pulley; 404, limit seat; 405, worm; 410, cylinder; 500, mold; 510, movable mold; 520, fixed mold; 521, shrinking column; 522, positioning block; 523, gate; 524, runner; 525, manifold; 530, core ;600, valve body; 700, adjustment structure; 710, adjustment unit; 711, push plate; 712, transmission plate; 713, cylindrical gear; 714, through groove; 720, double-track guide rail; 730, guide plate; 740, clamping plate; 800, clamping structure; 810, guide bar; 820, horizontal telescopic plate; 830, support plate group; 840, clamping unit; 841, rectangular frame plate; 842, support bar; 843, limit plate; 844, center axis; 845, clamping wheel; 900, feeding structure; 910, wheel axle; 920, ratchet; 930, rotating rod; 940, magnetic block; 950, ratchet. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0047] Example 1

[0048] Reference Figure 1-Figure 14As shown, the first embodiment of the present invention provides a fluoroplastic-lined valve thermoplastic injection molding device, including a frame structure 100, a valve body 600, a mold 500 and an injection machine body 200. The valve body 600 is assembled in the mold 500 and forms a cavity for accommodating fluoroplastics with the mold 500. The injection machine body 200 is used to heat the fluoroplastics to a molten state and transfer it to the cavity, wherein the injection machine body 200 is installed on the frame structure 100.

[0049] A thermoplastic injection molding device for fluorine-lined plastic valves also includes a clamping structure, which includes a mounting plate group 300, a drive assembly and a positioning assembly, the drive assembly includes a drive structure 400 and a cylinder 410, the mounting plate group 300 includes a movable plate 310, a fixed plate 320 and two sets of core seats 330, the positioning assembly includes a clamping structure 800, a feeding structure 900 and an adjustment structure 700, the feeding structure 900 is arranged in the clamping structure 800 and is connected to the movable plate 310 The driving structure 400 drives the movable mold plate 310 to move closer to or away from the fixed mold plate 320 to press or release the valve body 600, and synchronously drives the feeding structure 900 to rotate and feed. The adjustment structure 700 is arranged on the fixed mold plate 320. The adjustment structure 700 and the cylinder 410 jointly drive the two groups of core seats 330 to move toward or away from each other along the valve stem hole of the valve body 600. The adjustment structure 700 synchronously adjusts the clamping gap of the clamping structure 800 to release or clamp the valve body 600.

[0050] like Figure 5-Figure 7 As shown, the mold 500 includes a movable mold 510, a fixed mold 520 and a core 530. The movable mold 510, the fixed mold 520 and the core 530 are arranged in a one-to-one correspondence with the movable mold plate 310, the fixed mold plate 320 and the core seat 330. The movable mold 510 is assembled on the movable mold plate 310, the fixed mold 520 is assembled on the fixed mold plate 320, and the core 530 is assembled on the core seat 330. There are two groups of cores 530 and core seats 330. The two groups of cores 530 are respectively inserted into the valve stem hole of the valve body 600. The two groups of core seats 330 are symmetrical about the valve body 600. A cavity for accommodating fluoroplastics is formed between the movable mold 510, the fixed mold 520, the core 530 and the valve body 600. After the fluoroplastics are cured in the cavity, they are connected to the inner wall of the valve body 600 to form a fluorine lining.

[0051] The outer edge of the fixed mold 520 is evenly provided with a plurality of shrinking columns 521 adapted to the flange connection holes of the valve body 600. A positioning block 522 adapted to the inner cavity of the movable mold 510 is provided at the center of the fixed mold 520. The positioning block 522 extends toward the movable mold 510, and the mouth gradually shrinks as it extends.

[0052] Specifically, an injection port is provided on the side of the fixed mold 520 facing the injection machine body 200, and a collecting cavity 525 and a branch runner 524 are provided in the fixed mold 520. The fluoroplastic is transferred from the injection machine body 200 to the collecting cavity 525, and then diverted to the branch runner 524 through the collecting cavity 525. The branch runner 524 penetrates one side of the fixed mold 520 to form a gate 523, and the fluoroplastic in the branch runner 524 is poured into the mold cavity through the gate 523.

[0053] like Figure 3-Figure 4 As shown, the driving structure 400 is installed on the frame structure 100. There are two groups of driving structures 400. The two groups of driving structures 400 jointly drive the moving template 310 to move. The driving structure 400 includes a limiting seat 404 and a worm 405.

[0054] The movable mold side blocks 311 are fixed on both sides of the movable mold plate 310, and the fixed mold side blocks 321 are fixed on both sides of the fixed mold plate 320. The worm 405 is supported by the fixed mold side blocks 321 and the limiting seat 404. The worm 405 is inserted into the movable mold side blocks 311 and drives the movable mold side blocks 311 to move by rotating. The limiting seat 404, the movable mold side blocks 311 and the fixed mold side blocks 321 are all at the same height so that the worm 405 is horizontal.

[0055] The driving structure 400 also includes a driving motor 401, a belt 402 and a pulley 403. The pulley 403 is fixed to one end of the worm 405 that passes through the limit seat 404. The belt 402 is sleeved on the pulley 403. The output end of the driving motor 401 drives the pulley 403 to rotate through the belt 402, so that the worm 405 fixed to the pulley 403 rotates, and the rotating worm 405 drives the movable template 310 to move closer to or away from the fixed template 320.

[0056] like Figure 8 As shown, a triangular support seat 312 is fixed to the back of the movable platen 310 , and two sets of clamping seats 313 are fixed to the bottom end of the triangular support seat 312 , and the clamping seats 313 are clamped in the frame structure 100 .

[0057] like Figure 9-12 As shown, the clamping structure 800 includes a guide bar 810 and two groups of clamps sliding on the guide bar 810, the guide bar 810 is fixed on the fixed template 320, the two groups of clamps are symmetrically arranged, the clamp includes a support unit and a clamping unit 840, a group of support bars 842 is provided in the clamping unit 840, and the clamping unit 840 is rotated through the support bar 842 to adjust the angle of the support unit.

[0058] like Figure 9-12As shown, the clamping unit 840 includes a rectangular frame plate 841, and a plurality of ball assemblies are arranged inside the rectangular frame plate 841. The ball assemblies pass through the ends of the rectangular frame plate 841 and are fixed with limit plates 843 for limiting. The surfaces of the two groups of clamps also clamp clamping plates 740, and the two groups of clamping plates 740 are fixed on the pushing plate 711. When the pushing plate 711 moves up and down, the two groups of clamps are driven to move toward or away from each other through the clamping plates 740.

[0059] The ball assembly includes a central axis 844 and a clamping wheel 845. The clamping wheel 845 is engaged with the central axis 844 to avoid wear caused by misalignment and mutual friction between two adjacent clamping wheels 845. Each clamping wheel 845 is arranged in a rolling manner with the valve body 600. The valve body 600 clamped in the two sets of clamps has its center of gravity located on the center line of the valve stem hole passing through the valve body 600. The valve body 600 clamped in the two sets of clamps generates a deflection force due to the center of gravity. At the same time, the rolling contact between the clamping wheel 845 and the valve body 600 reduces friction, so that the valve body 600 can rotate smoothly during the clamping process to automatically adjust its position to achieve a self-positioning effect.

[0060] Specifically, the driving structure 400 drives the movable mold plate 310 to move close to the fixed mold plate 320 to drive the movable mold 510 to move toward the fixed mold 520, and an adapting cavity for accommodating the positioning block 522 is formed inside the movable mold 510. When the movable mold 510 and the fixed mold 520 approach each other, the positioning block 522 gradually enters the adapting cavity of the movable mold 510. Since the mouth of the positioning block 522 is designed with a reduced diameter, and the shape of the adapting cavity is consistent with that of the positioning block 522, the positioning block 522 is easy to enter the adapting cavity. As the positioning block 522 gradually enters the adapting cavity, the precise alignment and tight fit between the positioning block 522 and the adapting cavity can be ensured.

[0061] Before this, when the valve body 600 is clamped in the two sets of clamps, its center of gravity is located on the center line of the valve stem hole penetrating the valve body 600. Due to the rolling contact between the clamping wheel 845 and the valve body 600, the valve body 600 rotates spontaneously in the clamping unit 840 under the deflection force generated by the center of gravity, so that the valve body 600 automatically adjusts its position during the clamping process to ensure its accurate position. At this time, the flange connection hole on one side of the valve body 600 faces the fixed mold 520, and the flange connection hole on the other side of the valve body 600 faces the movable mold 510.

[0062] When the driving structure 400 drives the movable mold plate 310 to move close to the fixed mold plate 320 to drive the movable mold 510 to move toward the fixed mold 520, the shrinking column 521 on the surface of the fixed mold 520 is adapted to the flange connection hole of the valve body 600, and the shrinking end of the shrinking column 521 is smaller than the aperture of the flange connection hole. Even if the valve body 600 has a slight offset, the fixed mold 520 and the movable mold 510 can be accurately aligned with the valve body 600, thereby reducing the alignment accuracy of the movable mold 510, the fixed mold 520 and the valve body 600 during the assembly process and improving the assembly efficiency.

[0063] like Figure 11-Figure 14 As shown, the feeding structure 900 includes an axle 910 fixed on the horizontal telescopic plate 820, a ratchet 920 is fixed on the axle 910, and a rotating structure is provided on both sides of the ratchet 920. The ratchet 920 rotates under the external force to act on the axle 910, driving the rotating structure to rotate;

[0064] The feeding structure 900 also includes a pawl 950 , which is hinged to the surface of the movable platen 310 . The driving structure 400 drives the movable platen 310 to move closer to the fixed platen 320 , so that the pawl 950 is engaged in the tooth groove of the ratchet 920 , driving the ratchet 920 to rotate.

[0065] Specifically, the pawl 950 is composed of a base plate and oblique racks arranged at equal intervals at the front end of the base plate.

[0066] Specifically, the rotating structure includes a rotating rod 930 sleeved on the wheel axle 910 and a magnetic block 940 fixed to the end of the rotating rod 930. When the rotating structure rotates downward, the magnetic block 940 absorbs the valve body 600 and rotates it into the two sets of clamps.

[0067] Specifically, when the movable plate 310 moves forward, the pawl 950 pushes the ratchet 920 to rotate in one direction, thereby driving the wheel shaft 910 and the rotating structure to rotate synchronously. When the movable plate 310 moves backward, the pawl 950 slides through the tooth groove of the ratchet 920 and does not drive the ratchet 920 to rotate in the opposite direction, thereby realizing one-way transmission.

[0068] Specifically, the movable mold plate 310 and the fixed mold plate 320 are in a separated state, the horizontal telescopic plate 820 is in a naturally extended state, the clamping unit 840 is a certain distance away from the fixed mold 520, and the magnetic suction block 940 is in an initial position, ready to adsorb the valve body 600.

[0069] The driving structure 400 drives the movable platen 310 to move close to the fixed platen 320, and the movable platen 310 drives the pawl 950 to move forward. The pawl 950 is engaged in the tooth groove of the ratchet 920, pushing the ratchet 920 to rotate in one direction. The rotation of the ratchet 920 drives the wheel shaft 910 and the rotating rod 930 to rotate synchronously, and the magnetic attraction block 940 at the end of the rotating rod 930 rotates accordingly.

[0070] When the magnetic block 940 rotates to the top of the valve body 600, the magnetic block 940 absorbs the valve body 600. The movable plate 310 continues to be driven forward, and the pawl 950 continues to push the ratchet 920 to rotate. The continuous rotation of the ratchet 920 drives the rotating rod 930 and the magnetic block 940 to continue to rotate, and the absorbed valve body 600 is rotated and transported to the two sets of clamps. When the magnetic block 940 rotates to the top of the clamp, the valve body 600 is sent into the clamp.

[0071] The movable plate 310 continues to be driven forward, and the pawl 950 continues to push the ratchet 920 to rotate. The continuous rotation of the ratchet 920 drives the rotating rod 930 and the magnetic block 940 to continue to rotate, and the magnetic block 940 drives the valve body 600 to move forward and downward, but due to the obstruction of the clamp, the valve body 600 cannot move downward, and the rotating rod 930 drives the magnetic block 940 and the valve body 600 to separate, and the valve body 600 falls into the two sets of clamps. At the same time, the rack on the surface of the pawl 950 is separated from the meshing range of the ratchet 920, and the rotating rod 930 automatically rotates downward under the action of gravity, and the magnetic block 940 is reset.

[0072] When the driving structure 400 drives the movable platen 310 to retreat, the movable platen 310 drives the pawl 950 to retreat. The pawl 950 slides through the tooth groove of the ratchet 920 and does not drive the ratchet 920 to rotate in the opposite direction, and the ratchet 920 remains stationary. Since the ratchet 920 remains stationary, the axle 910 and the rotating rod 930 also stop rotating, and the magnetic block 940 remains in the current position.

[0073] In one embodiment, the support unit includes a horizontal telescopic plate 820 and a support plate group 830 . The support plate group 830 is vertically inserted into the horizontal telescopic plate 820 , and the support plate group 830 is sleeved on the surface of the support bar 842 .

[0074] Reference Fig.12 As shown, the support units are symmetrically arranged, and the support bar 842 is located at the upper center of the support unit, so that the support unit is in a horizontal state when not under pressure. The two groups of support units form an inverted "eight"-shaped opening, so that the feeding structure 900 has a larger placement range when rotating to feed.

[0075] Specifically, when the horizontal telescopic plate 820 is not subjected to pressure, the horizontal telescopic plate 820 is in a naturally extended state, so that the clamping unit 840 installed on the horizontal telescopic plate 820 is a certain distance away from the fixed mold 520. This initial state of the horizontal telescopic plate 820 ensures that the clamping unit 840 has sufficient room to move when the operation starts.

[0076] like Fig.10 , Fig.11 as well as Fig.13As shown, the adjustment structure 700 includes two groups of adjustment units 710, and a cylindrical gear 713 is provided between the two groups of adjustment units 710. The two groups of adjustment units 710 move toward or away from each other through the cylindrical gear 713, and the cylindrical gear 713 is rotatably mounted on the fixed template 320;

[0077] The adjusting unit 710 includes a pushing plate 711 and a transmission plate 712. The transmission plate 712 is connected to both sides of the pushing plate 711. The cylinder 410 drives the pushing plate 711 to move through the core seat 330 to drive the transmission plate 712 to engage with the cylindrical gear 713. A through groove 714 is also provided on the pushing plate 711 to prevent the two sets of transmission plates 712 from moving toward each other and being hindered by the pushing plate 711.

[0078] Specifically, there are two groups of adjustment units 710, and the two groups of adjustment units 710 are distributed and fixed in two groups of core seats 330. When one group of adjustment units 710 is driven to move up or down by the core seat 330, the two groups of adjustment units 710 move toward or away from each other through the cylindrical gear 713, and the other group of adjustment units 710 also moves down or up accordingly, so that the two groups of core seats 330 drive the core 530 to move toward or away from each other, so as to drive the core 530 to penetrate into or out of the valve stem hole of the valve body 600.

[0079] Reference Fig.11 As shown, the adjustment structure 700 further includes a double-track guide 720 , and the two sets of push plates 711 are guided by the double-track guide 720 to ensure that the push plates 711 are meshed with the cylindrical gears 713 .

[0080] like Fig.11 As shown, two sets of guide plate groups are fixed on the surface of the push plate 711 , and the two sets of guide plate groups include two sets of parallel guide plates 730 , and the two sets of guide plates 730 are clamped on the horizontal telescopic plate 820 .

[0081] The cylinder 410 drives the push plate 711 to move up and down through the core seat 330 , and then moves the two adjustment units 710 toward or away from each other through the cylindrical gear 713 , thereby driving the core 530 to penetrate or exit along the valve stem hole of the valve body 600 .

[0082] A fluorine-lined plastic valve thermoplastic injection molding process is implemented based on the above-mentioned fluorine-lined plastic valve thermoplastic injection molding equipment, and the process includes the following steps:

[0083] S1: Determine the positions of the movable mold 510, the fixed mold 520 and the core 530, the movable mold 510 is assembled on the movable mold plate 310, the fixed mold 520 is assembled on the fixed mold plate 320, the core 530 is assembled on the core seat 330, and the valve body 600 is transported to the bottom of the clamping structure 800, and the magnetic suction block 940 adsorbs the valve body 600;

[0084] S2: Start the driving structure 400, so that the movable mold plate 310 drives the movable mold 510 to approach the fixed mold 520, and the ratchet 950 is engaged in the tooth groove of the ratchet wheel 920, driving the ratchet wheel 920 to rotate;

[0085] The rotation of the ratchet 920 drives the wheel shaft 910 and the rotating structure to rotate synchronously, and the rotating rod 930 rotates accordingly. When the magnetic block 940 rotates to the top of the clamp, the valve body 600 is sent into the clamp, and the valve body 600 falls into the two sets of clamps and automatically adjusts its position under the action of gravity to ensure that its center of gravity is located on the center line of the valve stem hole penetrating the valve body 600;

[0086] The driving structure 400 continues to drive the movable platen 310 to move, and the continuous rotation of the ratchet 920 drives the rotating rod 930 and the magnetic block 940 to continue to rotate, the valve body 600 and the magnetic block 940 are separated, the rotating rod 930 is reset under the action of gravity, and the magnetic block 940 absorbs the next set of valve bodies 600;

[0087] S3: The driving structure 400 continues to drive the movable platen 310 to move forward, the horizontal telescopic plate 820 is forced to shrink, and the push plate 711 is driven to move through the cylinder 410 and the core seat 330 to drive the transmission plate 712 to mesh with the cylindrical gear 713;

[0088] The two groups of adjustment units 710 move toward each other through the cylindrical gear 713, driving the two groups of clamps to close together and lift the valve body 600, so that the valve body 600 enters the insertion range of the movable mold 510, and the movable mold 510 is inserted into the valve body 600. The adaption cavity inside the movable mold 510 is gradually aligned with the positioning block 522 in the fixed mold 520, ensuring the precise alignment between the movable mold 510 and the fixed mold 520. At the same time, the two groups of mold core seats 330 drive the mold core 530 to move along the valve stem hole of the valve body 600 until it abuts against the movable mold 510, forming a complete cavity;

[0089] S4: The injection molding machine body 200 is started, and the molten fluoroplastic is transferred to the mold cavity through the injection molding machine body 200. The molten fluoroplastic enters the manifold 525 through the injection port on the fixed mold 520, and then is poured into the mold cavity through the branch runner 524 and the gate 523;

[0090] S5: The fluoroplastic to be melted is cooled and solidified in the cavity, the driving structure 400 drives the movable mold plate 310 to retreat, and the movable mold 510 is separated from the fixed mold 520. As the movable mold 510 retreats, the positioning blocks 522 on the movable mold 510 and the fixed mold 520 are separated, and then the movable mold 510 is separated from the valve body 600. The valve body 600 abuts against the rectangular frame plate 841 in the clamper to achieve automatic demoulding. The adjustment structure 700 and the cylinder 410 drive the mold core seat 330 to withdraw the mold core 530 from the valve stem hole of the valve body 600.

[0091] S6: The driving structure 400 continues to drive the movable mold plate 310 to retreat, and at the same time, the cylinder 410 drives the push plate 711 to move through the core seat 330. The two groups of adjustment units 710 move in opposite directions through the cylindrical gear 713, driving the two groups of clamps to separate, and the horizontal telescopic plate 820 returns to a natural extension state to ensure that there is enough space between the clamps. The demoulded valve body 600 is squeezed by the next group of valve bodies 600 and pushed out of the clamp to complete the discharge process.

[0092] S7: After demolding and discharging are completed, the driving structure 400 drives the movable template 310 back to the initial position, ensuring that the movable template 310, the fixed template 320 and the core seat 330 are in the initial state, and the magnetic suction block 940 is ready to absorb the next valve body 600, ensuring that the equipment is in the initial state and ready for the next injection molding operation.

[0093] The device realizes automatic delivery of the valve body 600 through the one-way transmission mechanism of the ratchet 920 and the pawl 950, combined with the rotating rod 930 and the magnetic block 940. The movement of the movable plate 310 drives the pawl 950 to push the ratchet 920 to rotate, thereby driving the rotating rod 930 and the magnetic block 940 to rotate, and the valve body 600 is delivered into the clamp. The clamping wheel 845 in the clamping structure 800 is in rolling contact with the valve body 600, so that the valve body 600 can automatically adjust its position during the clamping process to ensure that its center of gravity is located on the center line of the valve stem hole, thereby improving the stability of the valve body 600 and avoiding the relative position deviation of the valve body 600 affecting the product quality of the fluorine lining. In addition, the positioning block 522 between the movable mold 510 and the fixed mold 520 is combined with the positioning of the adapter cavity to ensure the precise docking of the movable mold 510 and the fixed mold 520. At the same time, the flange connection hole, the movable mold 510 and the adaptation with the fixed mold 520 are used to ensure the close fit between the movable mold 510, the fixed mold 520 and the valve body 600, thereby improving the accuracy of injection molding.

[0094] This device combines the structural characteristics of the valve body 600, utilizes the flange connection holes and the center of gravity position on both sides of the valve body 600, and cooperates with the feeding structure 900 and the clamping structure 800 to realize the automatic loading and unloading and self-positioning functions of the valve body 600, cooperates with the relative movement of the movable template 310 and the fixed template 320, ensures the closing accuracy of the mold 500, reduces the deviation in the product molding process, and adjusts the clamping gap of the clamper by adjusting the structure 700 to adapt to valve body 600 structures of different sizes. It is suitable for the production of valve bodies 600 of different specifications, and enhances the versatility and adaptability of the injection molding equipment.

[0095] When the device adjusts the clamping gap of the clamp by adjusting the structure 700, vibration will be caused. The vibration will drive the valve body 600 installed in the clamp to be in a shaking process. During the shaking process, the valve body 600 will spontaneously adjust its position under the action of gravity, further promoting the accurate position of the valve body 600. In addition, when the valve body 600 is separated from the movable mold 510, the rectangular frame plate 841 in the clamp is used to apply a reverse force to the valve body 600 to achieve automatic demolding, thereby avoiding the inconvenience that may be caused by manual demolding.

[0096] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and equal changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention should all fall within the scope of the patent coverage of the present invention.

[0097] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0098] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0099] Finally: 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, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermoplastic injection molding device for a fluoroplastic-lined valve, comprising a valve body (600), a mold (500) and an injection molding machine body (200), wherein the valve body (600) is assembled in the mold (500) and forms a cavity with the mold (500) for accommodating the fluoroplastic, and the injection molding machine body (200) is used to heat the fluoroplastic to a molten state and transfer it to the cavity, characterized in that: The mold clamping structure also includes a mold clamping structure, the mold clamping structure includes a mounting plate group (300), a driving assembly and a positioning assembly, the driving assembly includes a driving structure (400) and a cylinder (410), the mounting plate group (300) includes a movable mold plate (310), a fixed mold plate (320) and two sets of mold core seats (330), the positioning assembly includes a clamping structure (800), a feeding structure (900) and an adjustment structure (700), the feeding structure (900) is arranged in the clamping structure (800) and is connected to the movable mold plate (310), the driving assembly includes a driving structure (400) and a cylinder (410), the mounting plate group (300) includes a movable mold plate (310), a fixed mold plate (320) and two sets of mold core seats (330), the positioning assembly includes a clamping structure (800), a feeding structure (900) and an adjustment structure (700), the feeding structure (900) is arranged in the clamping structure (800) and is connected to the movable mold plate (310), The structure (400) drives the movable mold plate (310) to move closer to or away from the fixed mold plate (320) to press or release the valve body (600), and synchronously drives the feeding structure (900) to rotate and feed. The adjustment structure (700) is arranged on the fixed mold plate (320). The adjustment structure (700) and the cylinder (410) jointly drive the two groups of core seats (330) to move toward or away from each other along the valve stem hole of the valve body (600). The adjustment structure (700) synchronously adjusts the clamping gap of the clamping structure (800) to release or clamp the valve body (600).

2. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 1, characterized in that: The mold (500) comprises a movable mold (510), a fixed mold (520) and a mold core (530), and the movable mold (510), the fixed mold (520) and the mold core (530) are arranged in a one-to-one correspondence with the movable mold plate (310), the fixed mold plate (320) and the mold core seat (330); The outer edge of the fixed mold (520) is evenly provided with a plurality of shrinking columns (521) adapted to the flange connection holes of the valve body (600), and a positioning block (522) adapted to the inner cavity of the movable mold (510) is provided at the center of the fixed mold (520). The positioning block (522) extends toward the movable mold (510), and the mouth gradually shrinks as it extends.

3. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 2, characterized in that: The clamping structure (800) comprises a guide bar (810) and two groups of clamps sliding on the guide bar (810); the clamps comprise a support unit and a clamping unit (840); a group of support bars (842) are arranged in the clamping unit (840); the clamping unit (840) is rotated through the support bars (842) to adjust the angle of the support unit.

4. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 3, characterized in that: The clamping unit (840) comprises a rectangular frame plate (841), a plurality of ball assemblies are arranged inside the rectangular frame plate (841), and a limiting piece (843) for limiting position is fixed at the end of the ball assembly that passes through the rectangular frame plate (841); The support unit comprises a horizontal telescopic plate (820) and a support plate group (830); the support plate group (830) is vertically inserted into the horizontal telescopic plate (820); and the support plate group (830) is sleeved on the surface of the support bar (842).

5. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 4, characterized in that: The feeding structure (900) comprises a wheel axle (910) fixed on a horizontal telescopic plate (820), a ratchet (920) being fixed on the wheel axle (910), and a rotating structure being arranged on both sides of the ratchet (920), the ratchet (920) being rotated by an external force to act on the wheel axle (910), thereby driving the rotating structure to rotate.

6. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 5, characterized in that: The feeding structure (900) further comprises a pawl (950) which is hinged to the surface of the movable platen (310). The driving structure (400) drives the movable platen (310) to move closer to the fixed platen (320) so that the pawl (950) engages in the tooth groove of the ratchet wheel (920), thereby driving the ratchet wheel (920) to rotate.

7. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 6, characterized in that: The adjustment structure (700) comprises two groups of adjustment units (710), and a cylindrical gear (713) is provided between the two groups of adjustment units (710), and the two groups of adjustment units (710) move towards or away from each other through the cylindrical gear (713); The adjustment unit (710) comprises a pushing plate (711) and a transmission plate (712), wherein the transmission plate (712) is connected to both sides of the pushing plate (711), and the cylinder (410) drives the pushing plate (711) to move through the core seat (330) to drive the transmission plate (712) to mesh with the column gear (713).

8. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 7, characterized in that: Two groups of guide plate groups are fixed on the surface of the pushing plate (711), and the two groups of guide plate groups include two groups of parallel guide plates (730). The two groups of guide plates (730) are clamped on the horizontal telescopic plate (820).

9. The fluorine-lined plastic valve thermoplastic injection molding equipment according to claim 8, characterized in that: It also includes a frame structure (100), the driving structure (400) is installed on the frame structure (100), the number of the driving structures (400) is two groups, the two groups of driving structures (400) jointly drive the moving template (310) to move, and the driving structure (400) includes a limit seat (404) and a worm (405); The movable mold side blocks (311) are fixed on both sides of the movable mold plate (310), and the fixed mold side blocks (321) are fixed on both sides of the fixed mold plate (320). The worm (405) is supported by the fixed mold side blocks (321) and the limiting seat (404). The worm (405) is inserted into the movable mold side blocks (311) and drives the movable mold side blocks (311) to move by rotating.

10. A fluorine-lined plastic valve thermoplastic injection molding process, implemented based on the fluorine-lined plastic valve thermoplastic injection molding equipment according to any one of claims 1 to 9, characterized in that: The process includes the following steps: S1: Determine the positions of the movable mold (510), the fixed mold (520) and the mold core (530), transport the valve body (600) to the bottom of the clamping structure (800), and set a magnetic suction block (940) to absorb the valve body (600); S2: starting the driving structure (400), so that the movable die plate (310) drives the movable die (510) to approach the fixed die (520), the ratchet pawl (950) is engaged in the tooth groove of the ratchet wheel (920), driving the ratchet wheel (920) to rotate, the rotation of the ratchet wheel (920) drives the wheel shaft (910) and the rotating structure to rotate synchronously, the magnetic suction block (940) rotates to convey the valve body (600) to the two sets of clamps, and the driving structure (400) continues to drive the movable die plate (310) to move; S3: The valve body (600) falls into the two sets of clamps and automatically adjusts its position under gravity. The driving structure (400) continues to drive the movable plate (310) to move forward, the horizontal telescopic plate (820) is forced to shrink, and the cylinder (410) and the core seat (330) drive the push plate (711) to move, so as to drive the transmission plate (712) to mesh with the cylindrical gear (713). The two sets of adjustment units (710) move toward each other through the cylindrical gear (713). The two groups of adjusting units (710) drive the two groups of clamps to move together and lift the valve body (600), so that the valve body (600) enters the insertion range of the movable mold (510), and the movable mold (510) is inserted into the valve body (600). The adapting cavity inside the movable mold (510) is aligned with the positioning block (522) in the fixed mold (520), and at the same time, the two groups of mold core seats (330) drive the mold core (530) to move along the valve stem hole of the valve body (600) until it abuts against the movable mold (510); S4: starting the injection molding machine body (200), heating the fluoroplastic to a molten state, and transferring it to the mold cavity through the injection molding machine body (200); the molten fluoroplastic is cooled and solidified in the mold cavity to form a fluorine lining layer.

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