A PVC molding machine and its molding mold

Abstract

The present invention discloses a PVC molding machine and its molding die, which relate to the technical field of injection molding equipment, and include a support frame and an injection assembly, wherein an oil cylinder is installed above the support frame, the bottom end of the support frame is docked with a mounting seat, and the middle part of the mounting seat is provided with a feeding cylinder penetrating with the support frame. The PVC molding machine and its molding die are provided with a screw, a material shifting mechanism, a feeding cylinder, a piston and a dispersion mechanism in linkage cooperation, and when the screw drives the dispersion mechanism to move, the raw material blocked in front of the steel ball can be shifted away by a reciprocating shifting plate in the process of stopping feeding to resuming feeding and evenly fed into the feeding cylinder, and the dispersion mechanism in the feeding cylinder is driven by the piston to operate, so that the PVC molten raw material introduced from the feeding hole can be sheared, and the rotating sleeve drives the saw teeth to rotate at the feeding hole of the feeding cylinder, so that the raw material introduced from the feeding hole into the feeding cylinder can be evenly distributed, ensuring that the PVC molding machine can achieve efficient injection of the raw material.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to a PVC molding machine and a molding mold thereof. Background Art

[0002] The injection molding machine is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. It uses the thrust of the screw to inject the plasticized molten plastic into the closed mold cavity, and obtains the product after solidification. When manufacturing and processing PVC products, the matching molding machine and mold can achieve rapid production of PVC products.

[0003] According to the Chinese patent with the announcement number CN103921391B, a vibration injection molding machine and its use are disclosed, which uses back-and-forth vibration shearing to optimize the internal condensed structure of the polymer melt; improve the mechanical properties and electrical conductivity of the composite material, and have better industrial prospects;

[0004] When in use, the above technical solution drives the vibrating piston to move forward and backward reciprocatingly, so that the vibrating piston can drive the injection push rod and the plunger forward and backward to realize the injection operation. However, in the process of stopping feeding to resuming feeding, the plasticizing screw extrudes the raw material to the storage cylinder, and the raw material may adhere to the valve and be blocked, making it difficult for the molding machine to achieve efficient injection when in use. Summary of the invention

[0005] The object of the present invention is to provide a PVC molding machine and a molding die thereof to solve the problems raised by the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a PVC molding machine, comprising a support frame and an injection assembly, an oil cylinder is installed above the support frame, the bottom end of the support frame is connected to the mounting seat, the output end of the oil cylinder is connected to the piston through a push-pull rod, a feeding cylinder penetrating the support frame is arranged in the middle of the mounting seat, the upper end of the feeding cylinder is plugged with the piston, an injection assembly is vertically arranged on one side of the feeding cylinder, the injection assembly includes a mounting sleeve installed on one side of the feeding cylinder by bolts, a barrel is installed on the side of the mounting sleeve away from the feeding cylinder, and a screw for raw material supply is movably connected inside the barrel;

[0007] A feeding hole is provided on one side of the feeding cylinder close to the mounting sleeve, and a sealing sleeve is provided at one side of the feeding hole and the mounting sleeve, a steel ball is provided between the sealing sleeve and the feeding hole, a material shifting mechanism is provided inside the mounting sleeve, the material shifting mechanism comprises a tapered sleeve threadedly connected to the end of the screw, a fixing block is integrally formed at the end of the tapered sleeve away from the screw, a push rod is inserted in the middle of the tapered sleeve, a driving groove for controlling the reciprocating extension and contraction of the push rod is provided on the inner wall of the tapered sleeve, a spring a is connected to the reserved groove at one end of the push rod, a connecting pin connected to the driving groove is fixed at one end of the spring a, an elastic rod is fixed to one end of the push rod, and a shifting plate is fixed to the end of the elastic rod away from the push rod;

[0008] The inside of the feeding cylinder is provided with a dispersion mechanism, which comprises a rotating sleeve movably connected to the inner wall of the feeding cylinder through a sealing bearing, and the lower edge of the rotating sleeve is provided with saw teeth for rotating cutting.

[0009] Preferably, the driving groove is composed of a long spiral groove, a V-shaped groove, an oblique groove and a short spiral groove on the inner wall of the cone sleeve, and the long spiral groove, the V-shaped groove, the oblique groove and the short spiral groove are connected end to end.

[0010] Preferably, a slit and a buffer opening are provided in the middle of the elastic rod, a fixing rod is welded to the inner wall of the mounting sleeve near one end of the fixing block, the cross section of the fixing rod is an isosceles triangle structure, and the elastic rod and the fixing rod are through-connected.

[0011] Preferably, the inner walls of the cone sleeve and the fixed block are provided with guide grooves parallel to the push rod, and a protrusion is provided at one end of the cone sleeve close to the long spiral groove.

[0012] Preferably, a magnet is embedded inside the sealing sleeve, and the magnet and the steel ball are connected by magnetic attraction.

[0013] Preferably, a plurality of heaters are mounted on the outer sleeve of the barrel, a hopper is connected to the top of the barrel, a motor is mounted on the end of the barrel away from the mounting sleeve, and the output end of the motor is docked with the spline at the end of the screw.

[0014] Preferably, the inner wall of the rotating sleeve is provided with a vertical slide, a corner groove and a spiral slide which are connected end to end in sequence, and the vertical slide, the corner groove and the spiral slide are arranged at equal angles on the inner wall of the rotating sleeve.

[0015] Preferably, the bottom of the piston is connected to a T-shaped rod, and the lower end of the T-shaped rod is inserted into the sleeve.

[0016] Preferably, a spring b which is sleeved with the T-rod is provided on the inner side of the sleeve, and the two ends of the spring b are respectively connected with the bottom end of the T-rod and the top end of the inner wall of the sleeve, and a sliding column which is connected with the driving groove is fixed on the outer side surface of the bottom end of the sleeve.

[0017] A forming mold includes a mounting plate, a male mold and a female mold, wherein the mounting plate is symmetrically mounted on both sides of the bottom of a support frame, hydraulic rods are mounted on both sides of the mounting plate, a male mold is mounted at the bottom center of the mounting seat, a female mold is docked below the male mold, a base is mounted on the outer edge of the bottom of the mounting seat, the output end of the hydraulic rod is docked with the lower edge of the female mold, a nozzle is threadedly connected to the bottom of the feed cylinder, and the nozzle is docked with the drainage channel between the male mold and the female mold.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the PVC molding machine and its molding mold are provided with a screw, a material shifting mechanism, a feeding cylinder, a piston and a dispersion mechanism in linkage cooperation; when the screw drives the dispersion mechanism to move, the raw material blocked in front of the steel ball can be shifted away by a reciprocating shifting plate in the process from stopping feeding to resuming feeding and evenly fed into the feeding cylinder; the dispersion mechanism in the feeding cylinder is driven by the piston to operate, so that the PVC molten raw material introduced from the feeding hole can be sheared; and the rotating sleeve drives the saw teeth to rotate at the feeding hole of the feeding cylinder, so that the raw material introduced from the feeding hole into the feeding cylinder can be evenly distributed, thereby ensuring that the PVC molding machine can achieve efficient injection of the raw material.

[0019] 1. The PVC molding machine and its molding die drive the screw to rotate and extrude the molten PVC raw material to the feeding cylinder through the motor. When the screw drives the cone sleeve to rotate and feed slowly and continuously, the two paddles at the front end of the elastic rod are reciprocated through the driving groove in the cone sleeve to realize reciprocating movement, so that the raw material blocked in front of the steel ball is removed by the paddle, so that the raw material blocked in front of the steel ball can be prevented from adhering to the steel ball in the process of stopping feeding and resuming feeding, so as to facilitate the smooth and uniform supply of PVC raw materials.

[0020] 2. The PVC molding machine and its molding die, when the oil cylinder is started, the push-pull rod at the bottom drives the piston to perform longitudinal extension and retraction and sliding in the feeding cylinder. The piston can slide along the corner groove, spiral slide and vertical slide of the inner wall of the rotating sleeve through the sliding column on the outside of the sleeve by reciprocating extension and retraction, and can drive the rotating sleeve to drive the saw teeth to intermittently rotate and shear the PVC molten raw material introduced from the feed hole to prevent the raw materials accumulated in the feeding cylinder from sticking. The rotating sleeve drives the saw teeth to rotate at the feed hole of the feeding cylinder to evenly distribute the raw materials introduced from the feed hole into the feeding cylinder, and the piston can vibrate and compact the raw materials in the feeding cylinder when extending and retracting to prevent gaps from forming when the raw materials flow downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a first three-dimensional structural schematic diagram of the PVC molding machine and its molding mold of the present invention;

[0022] Figure 2 It is a second three-dimensional structural schematic diagram of the PVC molding machine and its molding mold of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the connection between the feeding cylinder and the injection assembly of the present invention;

[0024] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the connection between the feed cylinder and the injection assembly of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional cross-section structure of the installation sleeve of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the linkage between the screw rod and the material shifting mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the cone sleeve of the present invention;

[0028] Figure 8 It is a schematic diagram of the hidden line visible three-dimensional structure of the drive grooves distributed on the inner wall of the cone sleeve of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional left half structure of the cone sleeve of the present invention;

[0030] Fig.10 It is a schematic diagram of the three-dimensional right half section structure of the cone sleeve of the present invention;

[0031] Fig.11 It is a schematic diagram of the front cutaway structure of the connection between the cone sleeve and the ejector rod of the present invention;

[0032] Fig.12 It is a three-dimensional structural schematic diagram of the top rod of the present invention;

[0033] Fig.13 It is a three-dimensional structural schematic diagram of the connection between the piston and the dispersion mechanism of the present invention;

[0034] Fig.14 It is a three-dimensional cross-sectional structural schematic diagram of the connection between the piston and the dispersion mechanism of the present invention;

[0035] Fig.15 It is a schematic diagram of a three-dimensional exploded structure of the dispersion mechanism of the present invention;

[0036] Fig.16 It is a schematic diagram of the three-dimensional cross-section structure of the connection between the feed hole of the feed cylinder and the steel ball of the present invention;

[0037] Fig.17 It is a schematic diagram of the three-dimensional explosion structure of the connection between the feeding cylinder, the male mold and the female mold of the present invention.

[0038] In the figure: 1, support frame; 101, oil cylinder; 102, push-pull rod; 103, piston; 2, mounting seat; 3, feeding cylinder; 4, injection assembly; 401, mounting sleeve; 402, barrel; 403, heater; 404, hopper; 405, motor; 406, screw; 5, material dispensing mechanism; 501, cone sleeve; 502, fixing block; 503, guide groove; 504, driving groove; 5041, long spiral groove; 5042, V-shaped groove; 5043, inclined groove; 5044, short spiral groove; 505, ejector rod; 5051, spring a; 5052, connecting pin; 506, elastic rod; 5061, slit; 5062, buffer port; 507, dial plate; 508, fixing rod; 6, sealing sleeve; 601, magnet; 7, steel ball; 8, dispersion mechanism; 801, rotating sleeve; 802, sawtooth; 803, vertical slide; 804, corner groove; 805, spiral slide; 806, T-bar; 807, sleeve; 808, spring b; 809, sliding column; 9, mounting plate; 10, hydraulic rod; 11, male mold; 12, female mold; 13, base; 14, nozzle. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 12 and Fig.16 The present invention provides a technical solution: a PVC molding machine, comprising a support frame 1 and an injection assembly 4, an oil cylinder 101 is installed above the support frame 1, the bottom end of the support frame 1 is connected to the mounting seat 2, the output end of the oil cylinder 101 is connected to the piston 103 through a push-pull rod 102, a feeding cylinder 3 penetrating the support frame 1 is arranged in the middle of the mounting seat 2, the upper end of the feeding cylinder 3 is plugged with the piston 103, an injection assembly 4 is vertically arranged on one side of the feeding cylinder 3, the injection assembly 4 includes a mounting sleeve 401 mounted on one side of the feeding cylinder 3 by bolts, a barrel 402 is installed on the side of the mounting sleeve 401 away from the feeding cylinder 3, and a screw 405 for raw material supply is movably connected inside the barrel 402;

[0041] A feeding hole is provided on one side of the feeding cylinder 3 close to the mounting sleeve 401, and a sealing sleeve 6 is provided between the feeding hole and one side of the mounting sleeve 401, a steel ball 7 is provided between the sealing sleeve 6 and the feeding hole, and a material shifting mechanism 5 is provided inside the mounting sleeve 401, the material shifting mechanism 5 includes a cone sleeve 501 threadedly connected to the end of the screw 405, and a fixing block 502 is integrally formed at the end of the cone sleeve 501 away from the screw 405. By twisting the fixing block 502 with a wrench, the cone sleeve 501 can be stably threadedly connected to the end of the screw 405, and vice versa, the cone sleeve 501 can be loosened to prevent the screw from being screwed. The threaded connection between the sleeve 501 and the screw rod 405 can facilitate the quick disassembly of the material-dispensing mechanism 5; a push rod 505 is inserted in the middle of the cone sleeve 501, and a driving channel 504 for controlling the reciprocating extension and contraction of the push rod 505 is provided on the inner wall of the cone sleeve 501. A spring a5051 is connected to the reserved groove at one end of the push rod 505, and a connecting pin 5052 that is connected to the driving channel 504 is fixed at one end of the spring a5051. An elastic rod 506 is fixed at one end of the push rod 505, and a shifting plate 507 is fixed at the end of the elastic rod 506 away from the push rod 505.

[0042] The driving channel 504 is composed of a long spiral groove 5041, a V-shaped groove 5042, an oblique groove 5043 and a short spiral groove 5044 on the inner wall of the cone sleeve 501. The long spiral groove 5041, the V-shaped groove 5042, the oblique groove 5043 and the short spiral groove 5044 are connected end to end. The number of spiral turns of the long spiral groove 5041 is 1 / 2 turn, and the number of spiral turns of the short spiral groove 5044 is 1 / 4 turn.

[0043] A slit 5061 and a buffer opening 5062 are provided in the middle of the elastic rod 506. A fixing rod 508 is welded to the inner wall of the mounting sleeve 401 near one end of the fixing block 502. The cross section of the fixing rod 508 is an isosceles triangle structure. The fixing rod 508 with an isosceles triangle structure squeezes the slit 5061 in the middle of the elastic rod 506, which causes the elastic rod 506 to be broken apart to both sides. The elastic rod 506 is made of spring steel. When the fixing rod 508 is butted against the buffer opening 5062, the elastic rod 506 can be reset. The elastic rod 506 and the fixing rod 508 are through-connected. The fixing rod 508 longitudinally penetrates the middle of the elastic rod 506, so that the elastic rod 506 and the top rod 505 will not rotate.

[0044] The sealing sleeve 6 is embedded with a magnet 601, and the magnet 601 and the steel ball 7 are magnetically attracted to each other. When the motor 406 stops driving the screw 405 to rotate and feed the material, the magnet 601 attracts the steel ball 7, causing the steel ball 7 to block the sealing sleeve 6, thereby preventing the raw material from continuing to be fed into the feeding cylinder 3.

[0045] Several heaters 403 are mounted on the outer sleeve of the barrel 402 , and a hopper 404 is also connected to the top of the barrel 402 . A motor 406 is mounted on the end of the barrel 402 away from the mounting sleeve 401 , and the output end of the motor 406 is connected to the spline at the end of the screw 405 .

[0046] In specific implementation, the PVC material is heated to a molten liquid state and added from the hopper 404 to the barrel 402, and the motor 406 drives the screw 405 to rotate and extrude the molten PVC raw material to be transported to the feeding cylinder 3. The barrel 402 can be heated and kept warm by controlling the temperature of the heater 403. When the raw material is sent to the front end of the screw 405, the rotating screw 405 will rotate through the fixed block 502 at the front end of the cone sleeve 501 to evenly stir the raw material introduced into the feeding hole of the feeding cylinder 3. When the raw material moves along the center of the sealing sleeve 6 and pushes the steel ball 7, the raw material will enter the feeding cylinder 3;

[0047] When the screw rod 405 drives the cone sleeve 501 to rotate 1 / 2 turn, the cone sleeve 501 squeezes the connecting pin 5052 on the push rod 505 through the long spiral groove 5041 on the inner wall, so that the connecting pin 5052 drives the push rod 505 to move a distance along the long spiral groove 5041. When the connecting pin 5052 moves from the beginning to the end of the spiral groove 5041, the elastic rod 506 at the front end of the push rod 505 moves along the fixed rod 508 and moves towards the steel ball 7, so that the fixed rod 508 is squeezed and moved forward along the buffer port 5062 of the elastic rod 506 to the position of the slit 5061, thereby forcing the elastic rod 506 to move forward. The elastic rod 506 drives the front-end paddle 507 to open to both sides, so that the two paddles 507 will make the raw materials blocked in front of the steel ball 7 flow to both sides; when the screw 405 continues to drive the cone sleeve 501 to rotate, the connecting pin 5052 on the push rod 505 will enter the V-shaped groove 5042 from the end of the long spiral groove 5041, and when the connecting pin 5052 moves in the V-shaped groove 5042, the push rod 505 will drive the elastic rod 506 to slide back and forth along the fixed rod 508, thereby causing the two paddles 507 to have a reciprocating deflection, and then the two paddles 507 will enter the feeding cylinder. 3, the raw material in the feed hole vibrates, and the state of the raw material in the polymerization injection into the feed cylinder 3 is changed by the vibration; then when the screw 405 drives the cone sleeve 501 to rotate again, the connecting pin 5052 on the push rod 505 will enter the inclined groove 5043 from the V-shaped groove 5042, so that the inclined groove 5043 squeezes the connecting pin 5052 and drives the push rod 505 to move in the reverse direction quickly, and the cone sleeve 501 that continues to rotate will squeeze the short spiral groove 5044 to ensure that the connecting pin 5052 pulls the push rod 505 and the elastic rod 506 back, ensuring that the slit 5043 in the middle of the elastic rod 506 is 61 is out of contact with the fixed rod 508, so that the buffer port 5062 in the middle of the elastic rod 506 is connected with the fixed rod 508, and the elastic rod 506 will drive the two paddles 507 to move closer to each other; when the motor 406 drives the screw 405 to rotate slowly and continuously to feed the material, the driving channel 504 in the cone sleeve 501 will reciprocate to drive the paddle 507 at the front end of the elastic rod 506 to pry away the raw material blocked in front of the steel ball 7, so that in the process of stopping feeding to resuming feeding, the raw material blocked in front of the steel ball 7 can be prevented from adhering to the steel ball 7, so that the supply of PVC raw materials can be completed smoothly and evenly.

[0048] See also Figure 9-11, the inner walls of the cone sleeve 501 and the fixed block 502 are provided with a guide groove 503 parallel to the push rod 505, and a protrusion is provided at one end of the cone sleeve 501 close to the long spiral groove 5041. When the push rod 505 and the cone sleeve 501 are assembled, the connecting pin 5052 at one end of the push rod 505 can be aligned with the guide groove 503 and moved, and the push rod 505 can be pushed linearly, so that the connecting pin 5052 on the push rod 505 squeezes the protrusion on the inner wall of the cone sleeve 501, so that the protrusion squeezes the connecting pin 5052 to compress the spring a5051. When the connecting pin 5052 is squeezed and accommodated in the reserved groove of the push rod 505, the push rod 505 is squeezed again to smoothly connect the connecting pin 5052 to the starting position of the long spiral groove 5041 of the driving channel 504.

[0049] See also Figure 1 , Figure 2 , Figure 4 , Figure 13-Figure 15 A dispersion mechanism 8 is provided inside the feeding cylinder 3, and the dispersion mechanism 8 includes a rotating sleeve 801 movably connected to the inner wall of the feeding cylinder 3 through a sealing bearing, and a sawtooth 802 for rotating cutting is provided on the lower edge of the rotating sleeve 801;

[0050] The inner wall of the rotating sleeve 801 is provided with a vertical slide 803, a corner groove 804 and a spiral slide 805 which are connected end to end in sequence. The vertical slide 803, the corner groove 804 and the spiral slide 805 are arranged at equal angles on the inner wall of the rotating sleeve 801.

[0051] The bottom of the piston 103 is connected with a T-shaped rod 806, the lower end of the T-shaped rod 806 is inserted into the sleeve 807, the inner wall of the sleeve 807 is longitudinally provided with an anti-deflection convex strip, and the outer edge of the bottom of the T-shaped rod 806 is provided with a sliding opening that docks with the anti-deflection convex strip. When the piston 103 is longitudinally extended and retracted, the T-shaped rod 806 can be driven to slide in the sleeve 807, and the sliding opening at the bottom of the T-shaped rod 806 and the anti-deflection convex strip on the inner wall of the sleeve 807 can be used for directional sliding. At the same time, when the sleeve 807 squeezes the rotating sleeve 801 through the outer sliding column 809 to rotate, it can ensure that the sleeve 807 and the T-shaped rod 806 are restricted by the piston 103 and will not rotate.

[0052] A spring b808 is provided on the inner side of the sleeve 807 and is sleeved with the T-shaped rod 806. The two ends of the spring b808 are respectively connected to the bottom end of the T-shaped rod 806 and the top end of the inner wall of the sleeve 807. A sliding column 809 that is connected to the driving groove 504 is fixed to the outer side surface of the bottom end of the sleeve 807.

[0053] In specific implementation, when the oil cylinder 101 is started, the push-pull rod 102 at the bottom drives the piston 103 to slide longitudinally in the feed cylinder 3. When the piston 103 is extended and retracted, the T-shaped rod 806 at the bottom drives the sleeve 807 to move downward. When the sliding column 809 on the outside of the sleeve 807 moves along the corner groove 804 on the inner wall of the rotating sleeve 801 to the spiral slide 805, the sliding column 809 squeezes the lower side wall of the spiral slide 805 to drive the rotating sleeve 801 to rotate once in the sealed bearing. When 809 moves to the intersection of the spiral slide 805 and the bottom of the vertical slide 803, the piston 103 will drive the T-shaped rod 806 to continue to move downward and stretch the spring b808. At this time, the T-shaped rod 806 moves downward in the middle of the sleeve 807 and does not drive the rotating sleeve 801 to rotate; when the oil cylinder 101 supplies oil in the reverse direction so that the push-pull rod 102 drives the piston 103 to move upward, the upward movement of the T-shaped rod 806 will cause the spring b808 to pull the sleeve 807 to move upward, so that the sliding column 809 on the outside of the sleeve 807 moves from the bottom end of the vertical slide 803 to the top end The rotating sleeve 801 does not rotate during this process. When the slide post 809 moves to the top of the vertical slide 803, the piston 103 that continues to move upward will pull the T-shaped rod 806 to squeeze the spring b808 inside the sleeve 807, and the slide post 809 outside the sleeve 807 will move from the top position of the vertical slide 803 to the top of the corner groove 804, so that the rotating sleeve 801 can perform a secondary small angle deflection. Based on this principle, the push-pull rod 102 is reciprocated by the oil cylinder 101, so that the piston at the bottom of the push-pull rod 102 When 103 reciprocates longitudinally in the feeding cylinder 3, it can drive the rotating sleeve 801 to drive the saw teeth 802 to intermittently rotate and shear the PVC molten raw material introduced from the feeding hole, so as to prevent the raw materials accumulated in the feeding cylinder 3 from sticking together, and the rotating sleeve 801 drives the saw teeth 802 to rotate at the feeding hole of the feeding cylinder 3, so that the raw materials introduced into the feeding cylinder 3 from the feeding hole can be evenly distributed, and the piston 103 can vibrate and compact the raw materials in the feeding cylinder 3 when it is extended and retracted, so as to prevent gaps from being generated when the raw materials flow downward.

[0054] See also Figure 1 , Figure 2 and Fig.17 A forming mold includes a mounting plate 9, a male mold 11 and a female mold 12. The mounting plate 9 is symmetrically mounted on both sides of the bottom of the support frame 1. Hydraulic rods 10 are mounted on both sides of the mounting plate 9. The male mold 11 is mounted at the bottom center of the mounting seat 2. The female mold 12 is docked below the male mold 11. A base 13 is mounted on the outer edge of the bottom of the mounting seat 2. The output end of the hydraulic rod 10 is docked with the lower edge of the female mold 12. The bottom of the feeding cylinder 3 is threadedly connected with a nozzle 14, and the nozzle 14 is docked with the drainage channel between the male mold 11 and the female mold 12.

[0055] During specific implementation, the entire molding machine and the molding mold are supported by the base 13, so that the equipment can be stably placed and installed at a specified position. When the piston 103 retracts and contracts in the feed cylinder 3 and pushes the compacted raw material along the nozzle 14 into the drainage channel, the liquid raw material will enter the molding cavity between the male mold 11 and the female mold 12, and then the circulating coolant is injected into the cooling channel of the female mold 12, so that the product in the molding cavity of the female mold 12 is quickly cooled and formed. After that, the lower edge of the female mold 12 is pushed by starting the hydraulic rod 10 on the mounting plate 9, so that the female mold 12 is disengaged from the male mold 11. At this time, the PVC molded product is taken out, and then the hydraulic rod 10 is started to pull the female mold 12 up to abut the male mold 11, so as to facilitate the continuous molding and manufacturing of PVC material products.

[0056] In summary, the PVC material is heated to a molten liquid state and added into the barrel 402 from the feeding hopper 404, the motor 406 drives the screw 405 to rotate and extrude the molten PVC raw material to the feeding cylinder 3, and the reciprocating extension and retracting push-pull rod 102 of the oil cylinder 101 drives the piston 103 to reciprocate and retract longitudinally in the feeding cylinder 3, which can drive the piston 103 to extrude and inject the raw material in the feeding cylinder 3 along the nozzle 14 into the molding cavity between the male mold 11 and the female mold 12 for molding the PVC product material. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0057] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 PVC molding machine, comprising a support frame (1) and an injection assembly (4), characterized in that: An oil cylinder (101) is installed above the support frame (1), the bottom end of the support frame (1) is connected to the mounting seat (2), the output end of the oil cylinder (101) is connected to the piston (103) via a push-pull rod (102), a feeding cylinder (3) penetrating the support frame (1) is arranged in the middle of the mounting seat (2), the upper end of the feeding cylinder (3) is plugged into the piston (103), an injection assembly (4) is vertically arranged on one side of the feeding cylinder (3), the injection assembly (4) includes a mounting sleeve (401) mounted on one side of the feeding cylinder (3) by bolts, a barrel (402) is installed on the side of the mounting sleeve (401) away from the feeding cylinder (3), and a screw (405) for raw material supply is movably connected inside the barrel (402); A feeding hole is provided on a side of the feeding cylinder (3) close to the mounting sleeve (401), and a sealing sleeve (6) is provided between the feeding hole and one side of the mounting sleeve (401), a steel ball (7) is provided between the sealing sleeve (6) and the feeding hole, and a material shifting mechanism (5) is provided inside the mounting sleeve (401), the material shifting mechanism (5) comprises a tapered sleeve (501) threadedly connected to the end of the screw (405), a fixing block (502) is integrally formed at the end of the tapered sleeve (501) away from the screw (405), and the tapered sleeve (501) A push rod (505) is inserted in the middle of the cone sleeve (501), a driving channel (504) for controlling the reciprocating extension and contraction of the push rod (505) is provided on the inner wall of the cone sleeve (501), a spring a (5051) is connected to a reserved groove at one end of the push rod (505), a connecting pin (5052) connected to the driving channel (504) is fixed at one end of the spring a (5051), an elastic rod (506) is fixed at one end of the push rod (505), and a dial plate (507) is fixed at one end of the elastic rod (506) away from the push rod (505); A dispersion mechanism (8) is provided inside the material supply cylinder (3), and the dispersion mechanism (8) comprises a rotating sleeve (801) movably connected to the inner wall of the material supply cylinder (3) via a sealing bearing, and the lower edge of the rotating sleeve (801) is provided with saw teeth (802) for rotating and cutting materials.

2. A PVC molding machine according to claim 1, characterized in that: The driving channel (504) is composed of a long spiral groove (5041), a V-shaped groove (5042), an inclined groove (5043) and a short spiral groove (5044) on the inner wall of the cone sleeve (501); the long spiral groove (5041), the V-shaped groove (5042), the inclined groove (5043) and the short spiral groove (5044) are arranged to be connected end to end.

3. A PVC molding machine according to claim 1, characterized in that: A slit (5061) and a buffer opening (5062) are provided in the middle of the elastic rod (506); a fixing rod (508) is welded to the inner wall of one end of the mounting sleeve (401) close to the fixing block (502); the cross section of the fixing rod (508) is an isosceles triangle structure; the elastic rod (506) and the fixing rod (508) are through-connected.

4. A PVC molding machine according to claim 2, characterized in that: The inner walls of the cone sleeve (501) and the fixed block (502) are provided with a guide groove (503) parallel to the push rod (505), and a protrusion is provided at one end of the cone sleeve (501) close to the long spiral groove (5041).

5. A PVC molding machine according to claim 1, characterized in that: A magnet (601) is embedded inside the sealing sleeve (6), and the magnet (601) and the steel ball (7) are connected by magnetic attraction.

6. A PVC molding machine according to claim 1, characterized in that: A plurality of heaters (403) are mounted on the outer sleeve of the barrel (402), and a hopper (404) is connected to the top of the barrel (402). A motor (406) is mounted on the end of the barrel (402) away from the mounting sleeve (401), and the output end of the motor (406) is connected to the spline at the end of the screw (405).

7. A PVC molding machine according to claim 1, characterized in that: The inner wall of the rotating sleeve (801) is provided with a vertical slideway (803), a corner groove (804) and a spiral slideway (805) which are connected end to end in sequence. The vertical slideway (803), the corner groove (804) and the spiral slideway (805) are arranged at equal angles on the inner wall of the rotating sleeve (801).

8. A PVC molding machine according to claim 1, characterized in that: The bottom of the piston (103) is connected to a T-shaped rod (806), and the lower end of the T-shaped rod (806) is inserted into a sleeve (807).

9. A PVC molding machine according to claim 8, characterized in that: A spring b (808) sleeved with the T-shaped rod (806) is arranged on the inner side of the sleeve (807), and two ends of the spring b (808) are respectively connected to the bottom end of the T-shaped rod (806) and the top end of the inner wall of the sleeve (807), and a sliding column (809) connected to the driving groove (504) is fixed to the outer side surface of the bottom end of the sleeve (807).

Images