A thermoplastic panel injection mold with high stability

Abstract

The invention discloses a thermoplastic panel injection mold with high stability, comprising a feed pipe, a top plate fixedly connected to the bottom end of the feed pipe, a thermal expansion device fixedly connected to the inner surface of the top plate, and a sealing box arranged at the bottom of the thermal expansion device. The invention relates to the field of mold technology. The sealing box is arranged in the invention. When the equipment is in use, the bottom plate is kept fixed, the sealing box is fixed on the upper surface of the bottom plate, the top plate is covered, a locking device is rotated, the locking device forces the top plate and the bottom plate to be close to each other to eliminate the gap, and a buffer device is installed. The buffer device can buffer the impact of the sealing box when the top plate is installed. During this process, the male mold and the female mold are close to each other, and the hot melt plastic is injected into the gap between the male mold and the female mold through the feed pipe. The suction device continuously sucks to extract the air inside the mold to facilitate the flow of thermoplastic. After the mold is cooled, the locking device and the buffer device are released to complete the mold opening, thereby solving the problem of poor stability of traditional thermoplastic molds.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a thermoplastic panel injection mold with high stability. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. It is known as the "mother of industry".

[0003] In the prior art, there is an automatic demolding device for a display panel injection mold with Chinese patent number: CN109454837B. In view of the problem that the existing demolding easily damages the finished product, the following scheme is proposed: an automatic demolding device for a display panel injection mold, comprising a symmetrically arranged protective body, a mold body is embedded in the protective body, a model cavity is formed between the mold body and the protective body, a feed hole is arranged on one side of the mold body, a plurality of flow pipes are passed through the four sides of the mold body, a plurality of discharge pipes are fixedly connected to one side of the flow pipe, a first solenoid valve is connected to the discharge pipe, a liquid inlet pipe is connected to one side of the flow pipe, and a water pump is connected to the mold body by bolts on the other end, and the water pump is fixedly connected to the mold body by bolts, and the input end of the water pump is fixedly connected to the feed pipe. The present invention has a simple structure and is easy to use. It can well cool down and discharge the mold production, and utilizes hydraulic pressure to well avoid mechanical damage to the mold, and facilitates unloading.

[0004] However, in the prior art, traditional molds are mostly fixed by pressing when in use. Although this method can reduce the gap between the molds, the pressure range is limited, and there are still leaking gaps outside the mold. In order to reduce the gap and improve the precision, heavier molds are often used for extrusion. However, after long-term repeated use, due to impact and wear, the inside of the mold will produce losses, affecting the precision. With a natural flow thermoplastic mold, the internal air is discharged slowly, affecting production efficiency. At the same time, the residual air will cause cavities to remain inside the solidified product, affecting the structural strength and stability. Summary of the invention

[0005] In view of the deficiencies of the prior art, the technical solution adopted by the present invention to solve the technical problems is: a thermoplastic panel injection mold with high stability, comprising a feed pipe, the bottom end of the feed pipe is fixedly connected to a top plate, the inner surface of the top plate is fixedly connected to a thermal expansion device, a sealing box is arranged at the bottom of the thermal expansion device, the bottom plate is kept fixed, the sealing box is fixed to the upper surface of the bottom plate, the top plate is covered, the locking device is rotated, the locking device forces the top plate and the bottom plate to be close to each other, eliminates the gap, and a buffer device is installed, the buffer device can buffer the impact of the sealing box when the top plate is installed, locking devices are arranged on both sides of the sealing box, the bottom of the locking device is arranged at the bottom of the bottom plate, a suction device is arranged at the bottom of the bottom plate, a concave mold is arranged at the top of the suction device, a convex mold is arranged at the top of the concave mold, and buffer devices are arranged on both sides of the convex mold;

[0006] The locking device includes a screw rod, the outer surface of which is fixedly connected to a compression spring, the right end of which is fixedly connected to a slip ring, and the outer surface of the right side of the slip ring is rotatably connected to an adjusting nut. During this process, the male mold and the female mold are close to each other, and the hot melt plastic is injected into the gap between the male mold and the female mold through the feed pipe. The suction device continuously sucks to extract the air inside the mold to facilitate the flow of hot plastic. After the mold is cooled, the locking device and the buffer device are loosened to complete the mold opening. A connecting plate is provided on the right side of the adjusting nut, and pins are provided on both sides of the connecting plate. The bottom end of the pin is rotatably connected to a movable rod.

[0007] Preferably, the outer surface of the right end of the screw is fixedly connected to the inner surface of the connecting plate, the outer surface of the connecting plate is fixedly connected to the outer surface of the sealing box, the inner surface of the adjusting nut is threadedly connected to the outer surface of the screw, and after the installation of the top plate is completed, the pin is inserted into the interior of the top plate and the bottom plate in turn, and then the adjusting nut is rotated, the adjusting nut rotates to the left along the outer surface of the screw, the slip ring pushes the compression spring, and under the pull of the slip ring, the movable rod obliquely pulls the pin, the outer surface of the slip ring is rotationally connected to the bottom end of the movable rod, the outer surface of the pin is clamped with the inner surfaces of the top plate and the bottom plate, and the inner surface of the slip ring is slidably connected to the outer surface of the screw.

[0008] Preferably, the outer surface of the concave mold is fixedly connected to the inner surface of the sealing box, the inner surface of the sealing box is fixedly connected to the outer surface of the punch, the connecting plate reduces the local pressure of the screw on the sealing box when it is pulled by increasing the contact area with the sealing box, and prevents the sealing box from deforming. After the mold is cooled, the adjusting nut is rotated in the opposite direction, and the compression spring pushes the slip ring to slide to the right along the outer surface of the screw, and the movable rod is rotated to pull the pin out from the inside of the top plate and the bottom plate. The upper surface of the bottom plate is fixedly connected to the lower surface of the sealing box, and the upper surface of the sealing box is fixedly connected to the lower surface of the top plate, and the thermal expansion device is symmetrically installed on both sides of the feed pipe.

[0009] Preferably, the buffer device includes a top nut, the inner surface of the top nut is threadedly connected to a control rod, the outer surface of the control rod is threadedly connected to a bottom nut, a top slide is provided at the bottom of the bottom nut, a fixed cylinder is installed on the top of the die, a top plate is installed, the lower surface of the top plate contacts with the upper surface of the bottom nut, the top nut is rotated so that the top plate is locked, and when the locking device is rotated, the pressure of the top plate forces the control rod to move downward, the top slide slides downward along the inner surface of the fixed cylinder, the airbag is compressed, and the control rod extends from the inside of the bottom slide, the lower surface of the top slide is fixedly connected to the airbag, the lower surface of the airbag is fixedly connected to the bottom slide, the lower surface of the bottom slide is fixedly connected to a spring, and the bottom end of the spring is fixedly connected to the fixed cylinder.

[0010] Preferably, the lower surface of the fixed cylinder is in contact with the upper surface of the die, the inner surface of the fixed cylinder is slidably connected to the outer surfaces of the top slide plate and the bottom slide plate, the inner surface of the bottom slide plate is slidably connected to the outer surface of the control rod, and then the bottom slide plate slides downward along the inner surface of the fixed cylinder, the spring sheet is squeezed and bent, and multi-stage buffering is used to increase the sealing effect of the mold while also preventing the top plate from impacting the internal mold during installation due to excessive pressure, causing mold deformation and affecting molding accuracy. The outer surface of the control rod is fixedly connected to the inner surface of the top slide plate, the control rod passes through the top plate, the lower surface of the top plate is in contact with the upper surface of the bottom nut, and the upper surface of the top plate is rotatably connected to the lower surface of the top nut.

[0011] Preferably, the suction device includes a straw, the bottom end of which is fixedly connected to a sealing cylinder, the inner surface of which is movably connected to a one-way valve, the straw is inserted into the interior of the mold, and as the thermoplastic is injected, the push-pull rod forces the sealing plate to slide up and down along the inner surface of the sealing cylinder, a sealing plate is provided at the bottom of the one-way valve, the lower surface of the sealing plate is fixedly connected to the push-pull rod, and exhaust pipes are provided on both sides of the push-pull rod.

[0012] Preferably, the outer surface of the straw is fixedly connected to the inner surface of the bottom plate, the top end of the straw is connected to the interior of the concave mold, the interior of the punch is connected to the bottom end of the feed pipe, the lower surface of the bottom plate is fixedly connected to the upper surface of the sealing cylinder, when the sealing plate slides downward, the I-type plate inside the one-way valve slides downward along the outer surface of the limit rod, and the air inside the mold is injected from the inside of the mold into the inside of the sealing cylinder through the through hole inside the fixed plate, the inner surface of the sealing cylinder is fixedly connected to the inner surface of the exhaust pipe, and the inner surface of the sealing cylinder is slidably connected to the push-pull rod and the outer surface of the sealing plate.

[0013] Preferably, the one-way valve includes an I-shaped plate, and then the sealing plate slides upward, the air is squeezed out from the exhaust pipe, and the I-shaped plate slides upward along the outer surface of the limiting rod, and the bottom of the through hole is blocked, and this process is repeated. The inner surface of the I-shaped plate is slidably connected to the limiting rod, and a fixing plate is provided outside the limiting rod, and a through hole is opened in the wall of the fixing plate.

[0014] Preferably, the outer surface of the fixed plate is fixedly connected to the inner surface of the sealing tube, the top end of the limit rod is fixedly connected to the inner surface of the sealing tube, and the heat-conducting rod is fixed to the upper surface of the die. As the mold is closed and the thermoplastic is injected, the heat of the thermoplastic is transferred outward to the inside of the bent pipe through the heat-conducting rod. The hydraulic oil inside the bent pipe expands due to the heat, and the push rod extends from the inside of the bent pipe. The push rod presses downward against the top plate, and the outer surface of the fixed plate contacts the outer surface of the I-type plate.

[0015] Preferably, the thermal expansion device includes a heat-conducting rod, the top end of the heat-conducting rod is fixedly connected to a bent pipe, and the inner surface of the bent pipe is slidably connected to a push rod, so that the sealing effect is further enhanced, and the mold achieves a certain self-locking closure through the heat of the thermoplastic itself. When the thermoplastic is cooled and solidified, the hydraulic oil cools and shrinks, the push rod retracts into the inside of the bent pipe, and the equipment is automatically opened. The bottom end of the push rod is fixedly connected to the upper surface of the top plate, and the outer surface of the heat-conducting rod is fixedly connected to the top plate and the inner surface of the punch.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention provides a sealing box. When the device is in use, the bottom plate remains fixed, the sealing box is fixed on the upper surface of the bottom plate, the top plate is covered, the locking device is rotated, the locking device forces the top plate and the bottom plate to be close to each other, eliminates the gap, and installs a buffer device. The buffer device can buffer the impact of the sealing box when the top plate is installed. During this process, the male mold and the female mold are close to each other, and the hot melt plastic is injected into the gap between the male mold and the female mold through the feeding pipe. The suction device continuously sucks to extract the air inside the mold to facilitate the flow of the thermoplastic. After the mold is cooled, the locking device and the buffer device are released to complete the mold opening, thereby solving the problem of poor stability of traditional thermoplastic molds.

[0018] 2. The present invention provides a locking device. When the equipment is used, as the installation of the top plate is completed, the pins are inserted into the inside of the top plate and the bottom plate in turn, and then the adjusting nut is rotated. The adjusting nut rotates to the left along the outer surface of the screw, and the slip ring pushes the compression spring. Under the pulling of the slip ring, the movable rod pulls the pin obliquely, and the connecting plate reduces the local pressure of the screw on the sealing box when pulling by increasing the contact area with the sealing box to prevent the sealing box from deforming. After the mold is cooled, the adjusting nut is rotated in the opposite direction, and the compression spring pushes the slip ring to slide to the right along the outer surface of the screw. The movable rod is rotated to pull the pin out from the inside of the top plate and the bottom plate, thereby solving the problems of traditional block extrusion molds, such as poor pressing seal, easy leakage of thermoplastics, and unstable shape of locked products.

[0019] 3. The present invention provides a buffer device. When the equipment is in use, the fixed cylinder is installed on the top of the die, and the top plate is installed. The lower surface of the top plate contacts the upper surface of the bottom nut. The top nut is rotated to lock the top plate. When the locking device is rotated, the pressure of the top plate forces the control rod to move downward, and the top slide slides downward along the inner surface of the fixed cylinder. The airbag is compressed, and the control rod extends from the inside of the bottom slide. Then the bottom slide slides downward along the inner surface of the fixed cylinder, and the spring sheet is squeezed and bent. Through multi-stage buffering, while increasing the sealing effect of the mold, it can also prevent the top plate from impacting the internal mold during installation due to excessive pressure, causing mold deformation and affecting the molding accuracy. The problem of repeated impact inside the traditional mold and easy wear and deformation is solved.

[0020] 4. The present invention provides a suction device. When the equipment is in use, a straw is inserted into the interior of the mold. As the thermoplastic is injected, the push-pull rod forces the sealing plate to slide up and down along the inner surface of the sealing cylinder. When the sealing plate slides downward, the I-plate inside the one-way valve slides downward along the outer surface of the limiting rod. The air inside the mold is injected downward from the inside of the mold through the through hole inside the fixed plate into the interior of the sealing cylinder. Then the sealing plate slides upward, the air is squeezed out from the exhaust pipe, and the I-plate slides upward along the outer surface of the limiting rod. The bottom of the through hole is blocked, and this process is repeated. This solves the problem that the natural flow rate of air inside the traditional mold is slow, and air is easily retained inside the mold, which affects the mold structure.

[0021] 5. The present invention provides a thermal expansion device. When the equipment is in use, the heat-conducting rod is fixed on the upper surface of the die. As the mold is closed and the thermoplastic is injected, the heat of the thermoplastic is transferred outward to the inside of the bent pipe through the heat-conducting rod. The hydraulic oil inside the bent pipe expands due to the heat, and the push rod extends from the inside of the bent pipe. The push rod presses downward against the top plate, so that the sealing effect is further increased. The mold achieves a certain self-locking closure through the heat of the thermoplastic itself. When the thermoplastic is cooled and solidified, the hydraulic oil cools and shrinks, the push rod retracts into the inside of the bent pipe, and the equipment is automatically opened, which solves the problem of low automation level of traditional molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the present invention;

[0023] Figure 2 is a cross-sectional view of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the locking device of the present invention;

[0025] Figure 4 is an exploded view of the locking device of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the buffer device of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the suction device of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the one-way valve of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the thermal expansion device of the present invention.

[0030] In the figure: 1. feed pipe; 2. top plate; 3. thermal expansion device; 4. sealing box; 5. locking device; 6. bottom plate; 7. suction device; 8. die; 9. punch; 10. buffer device; 11. screw; 12. compression spring; 13. slip ring; 14. adjusting nut; 15. connecting plate; 16. latch; 17. movable rod; 20. top nut; 21. control rod; 22. bottom nut; 23. top slide; 24. air bag; 25. bottom slide; 26. shrapnel; 27. fixing tube; 30. suction tube; 31. sealing tube; 32. one-way valve; 33. sealing plate; 34. push-pull rod; 35. exhaust pipe; 36. I-type plate; 37. limit rod; 38. fixing plate; 39. through hole; 40. heat-conducting rod; 41. elbow; 42. top rod. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0032] Embodiment 1:

[0033] See also Figure 1 - Figure 8The present invention provides a technical solution: a thermoplastic panel injection mold with high stability, comprising a feed pipe 1, a top plate 2 is fixedly connected to the bottom end of the feed pipe 1, a thermal expansion device 3 is fixedly connected to the inner surface of the top plate 2, a sealing box 4 is arranged at the bottom of the thermal expansion device 3, locking devices 5 are arranged on both sides of the sealing box 4, a bottom plate 6 is arranged at the bottom of the locking device 5, a suction device 7 is arranged at the bottom of the bottom plate 6, a concave mold 8 is arranged at the top of the suction device 7, a punch 9 is arranged at the top of the concave mold 8, and buffer devices 10 are arranged on both sides of the punch 9; the locking device 5 comprises a screw 11, a compression spring 12 is fixedly connected to the outer surface of the screw 11, a slip ring 13 is fixedly connected to the right end of the compression spring 12, an adjusting nut 14 is rotatably connected to the outer surface of the right side of the slip ring 13, a connecting plate 15 is arranged on the right side of the adjusting nut 14, latches 16 are arranged on both sides of the connecting plate 15, and a movable rod 17 is rotatably connected to the bottom end of the latch 16.

[0034] The outer surface of the right end of the screw 11 is fixedly connected to the inner surface of the connecting plate 15, the outer surface of the connecting plate 15 is fixedly connected to the outer surface of the sealing box 4, the inner surface of the adjusting nut 14 is threadedly connected to the outer surface of the screw 11, the outer surface of the slip ring 13 is rotatably connected to the bottom end of the movable rod 17, the outer surface of the latch 16 is clamped to the inner surfaces of the top plate 2 and the bottom plate 6, and the inner surface of the slip ring 13 is slidably connected to the outer surface of the screw 11. The outer surface of the concave mold 8 is fixedly connected to the inner surface of the sealing box 4, the inner surface of the sealing box 4 is fixedly connected to the outer surface of the punch 9, the upper surface of the bottom plate 6 is fixedly connected to the lower surface of the sealing box 4, the upper surface of the sealing box 4 is fixedly connected to the lower surface of the top plate 2, and the thermal expansion device 3 is symmetrically installed on both sides of the feed pipe 1.

[0035] When in use, the bottom plate 6 remains fixed, the sealing box 4 is fixed on the upper surface of the bottom plate 6, the top plate 2 is covered, the locking device 5 is rotated, the locking device 5 forces the top plate 2 and the bottom plate 6 to be close to each other, eliminates the gap, and installs the buffer device 10. The buffer device 10 can buffer the impact of the sealing box 4 when the top plate 2 is installed. During this process, the male mold 9 and the female mold 8 are close to each other, and the hot melt plastic is injected into the gap between the male mold 9 and the female mold 8 through the feeding pipe 1. The suction device 7 continuously sucks to extract the air inside the mold to facilitate the flow of hot plastic. After the mold is cooled, the locking device 5 and the buffer device 10 are released to complete the mold opening.

[0036] After the installation of the top plate 2 is completed, the pin 16 is inserted into the inside of the top plate 2 and the bottom plate 6 in turn, and then the adjusting nut 14 is rotated. The adjusting nut 14 rotates to the left along the outer surface of the screw 11, and the slip ring 13 pushes the compression spring 12. Under the pulling of the slip ring 13, the movable rod 17 pulls the pin 16 obliquely, and the connecting plate 15 reduces the local pressure of the screw 11 on the sealing box 4 when pulling by increasing the contact area with the sealing box 4 to prevent the sealing box 4 from deforming. After the mold is cooled, the adjusting nut 14 is rotated in the opposite direction, and the compression spring 12 pushes the slip ring 13 to slide to the right along the outer surface of the screw 11. The movable rod 17 is rotated to pull the pin 16 out of the inside of the top plate 2 and the bottom plate 6.

[0037] Embodiment 2:

[0038] See also Figure 1 - Figure 8 The present invention provides a technical solution: on the basis of the first embodiment, the buffer device 10 includes a top nut 20, the inner surface of the top nut 20 is threadedly connected with a control rod 21, the outer surface of the control rod 21 is threadedly connected with a bottom nut 22, a top slide 23 is arranged at the bottom of the bottom nut 22, an air bag 24 is fixedly connected to the lower surface of the top slide 23, a bottom slide 25 is fixedly connected to the lower surface of the air bag 24, a spring 26 is fixedly connected to the lower surface of the bottom slide 25, and a fixed cylinder 27 is fixedly connected to the bottom end of the spring 26. The lower surface of the fixed cylinder 27 contacts the upper surface of the die 8, the inner surface of the fixed cylinder 27 is slidably connected with the outer surfaces of the top slide 23 and the bottom slide 25, the inner surface of the bottom slide 25 is slidably connected with the outer surface of the control rod 21, the outer surface of the control rod 21 is fixedly connected with the inner surface of the top slide 23, the control rod 21 passes through the top plate 2, the lower surface of the top plate 2 contacts with the upper surface of the bottom nut 22, and the upper surface of the top plate 2 is rotatably connected with the lower surface of the top nut 20.

[0039] The suction device 7 includes a suction pipe 30, a sealing cylinder 31 is fixedly connected to the bottom end of the suction pipe 30, a one-way valve 32 is movably connected to the inner surface of the sealing cylinder 31, a sealing plate 33 is arranged at the bottom of the one-way valve 32, a push-pull rod 34 is fixedly connected to the lower surface of the sealing plate 33, and exhaust pipes 35 are arranged on both sides of the push-pull rod 34. The outer surface of the suction pipe 30 is fixedly connected to the inner surface of the bottom plate 6, the top of the suction pipe 30 is connected to the inside of the concave mold 8, the inside of the convex mold 9 is connected to the bottom end of the feed pipe 1, the lower surface of the bottom plate 6 is fixedly connected to the upper surface of the sealing cylinder 31, the inner surface of the sealing cylinder 31 is fixedly connected to the inner surface of the exhaust pipe 35, and the inner surface of the sealing cylinder 31 is slidably connected to the outer surfaces of the push-pull rod 34 and the sealing plate 33.

[0040] The one-way valve 32 includes a profile plate 36, the inner surface of which is slidably connected to a limit rod 37, a fixing plate 38 is provided outside the limit rod 37, and a through hole 39 is provided in the wall of the fixing plate 38. The outer surface of the fixing plate 38 is fixedly connected to the inner surface of the sealing cylinder 31, the top end of the limit rod 37 is fixedly connected to the inner surface of the sealing cylinder 31, and the outer surface of the fixing plate 38 contacts the outer surface of the profile plate 36.

[0041] When in use, the fixed cylinder 27 is installed on the top of the die 8, and the top plate 2 is installed. The lower surface of the top plate 2 contacts the upper surface of the bottom nut 22, and the top nut 20 is rotated to lock the top plate 2. When the locking device 5 rotates, the pressure of the top plate 2 forces the control rod 21 to move downward, and the top slide 23 slides downward along the inner surface of the fixed cylinder 27. The airbag 24 is compressed, and the control rod 21 extends from the inside of the bottom slide 25. Then the bottom slide 25 slides downward along the inner surface of the fixed cylinder 27, and the spring piece 26 is squeezed and bent. Through multi-stage buffering, while increasing the sealing effect of the mold, it can also prevent the top plate 2 from impacting the internal mold during installation due to excessive pressure, causing mold deformation and affecting the molding accuracy.

[0042] The straw 30 is inserted into the interior of the mold. As the thermoplastic is injected, the push-pull rod 34 forces the sealing plate 33 to slide up and down along the inner surface of the sealing tube 31. When the sealing plate 33 slides downward, the I-plate 36 inside the one-way valve 32 slides downward along the outer surface of the limiting rod 37. The air inside the mold is injected downward into the interior of the sealing tube 31 from the inside of the mold through the through hole 39 inside the fixing plate 38. Then the sealing plate 33 slides upward, the air is squeezed out from the exhaust pipe 35, and the I-plate 36 slides upward along the outer surface of the limiting rod 37. The bottom of the through hole 39 is blocked, and this process is repeated.

[0043] Embodiment three:

[0044] See also Figure 1 - Figure 8 The present invention provides a technical solution: on the basis of the second embodiment, the thermal expansion device 3 includes a heat-conducting rod 40, the top end of the heat-conducting rod 40 is fixedly connected with a bent pipe 41, the inner surface of the bent pipe 41 is slidably connected with a push rod 42, the bottom end of the push rod 42 is fixedly connected to the upper surface of the top plate 2, and the outer surface of the heat-conducting rod 40 is fixedly connected to the top plate 2 and the inner surface of the punch 9.

[0045] When in use, the heat-conducting rod 40 is fixed on the upper surface of the die 8. As the mold is closed and the thermoplastic is injected, the heat of the thermoplastic is transferred outwardly to the inside of the curved pipe 41 through the heat-conducting rod 40. The hydraulic oil inside the curved pipe 41 expands due to the heat, and the push rod 42 extends from the inside of the curved pipe 41. The push rod 42 presses downward against the top plate 2, so that the sealing effect is further increased. The mold achieves a certain self-locking closure through the heat of the thermoplastic itself. When the thermoplastic cools and solidifies, the hydraulic oil cools and shrinks, and the push rod 42 retracts into the inside of the curved pipe 41, and the equipment is automatically opened.

[0046] Working principle:

[0047] When the equipment is in use, the bottom plate 6 remains fixed, the sealing box 4 is fixed on the upper surface of the bottom plate 6, the top plate 2 is covered, the locking device 5 is rotated, the locking device 5 forces the top plate 2 and the bottom plate 6 to be close to each other, eliminates the gap, and installs the buffer device 10. The buffer device 10 can buffer the impact of the top plate 2 on the sealing box 4 when installing. During this process, the male mold 9 and the female mold 8 are close to each other, and the hot melt plastic is injected into the gap between the male mold 9 and the female mold 8 through the feeding pipe 1. The suction device 7 continuously sucks to extract the air inside the mold to facilitate the flow of thermoplastic. After the mold is cooled, the locking device 5 and the buffer device 10 are released to complete the mold opening, which solves the problem of poor stability of traditional thermoplastic molds.

[0048] With the installation of the top plate 2 completed, the latch 16 is inserted into the top plate 2 and the bottom plate 6 in turn, and then the adjusting nut 14 is rotated. The adjusting nut 14 rotates to the left along the outer surface of the screw 11, and the slip ring 13 pushes the compression spring 12. Under the pull of the slip ring 13, the movable rod 17 pulls the latch 16 obliquely, and the connecting plate 15 reduces the local pressure of the screw 11 on the sealing box 4 when pulling by increasing the contact area with the sealing box 4 to prevent the sealing box 4 from deforming. After the mold is cooled, the adjusting nut 14 is rotated in the opposite direction, and the compression spring 12 pushes the slip ring 13 to slide to the right along the outer surface of the screw 11. The movable rod 17 is rotated to pull the latch 16 out of the top plate 2 and the bottom plate 6, which solves the problem of poor pressing seal, easy leakage of thermoplastics, and unstable shape of locked products in traditional briquetting extrusion molds.

[0049] The fixed cylinder 27 is installed on the top of the die 8, and the top plate 2 is installed. The lower surface of the top plate 2 contacts the upper surface of the bottom nut 22. The top nut 20 is rotated to lock the top plate 2. When the locking device 5 is rotated, the pressure of the top plate 2 forces the control rod 21 to move downward, and the top slide 23 slides downward along the inner surface of the fixed cylinder 27. The airbag 24 is compressed, and the control rod 21 extends from the inside of the bottom slide 25. Then the bottom slide 25 slides downward along the inner surface of the fixed cylinder 27, and the spring piece 26 is squeezed and bent. Through multi-stage buffering, while increasing the sealing effect of the mold, it can also prevent the top plate 2 from impacting the internal mold during installation due to excessive pressure, causing mold deformation and affecting the molding accuracy. The problem of repeated impact inside the traditional mold and easy wear and deformation is solved.

[0050] The straw 30 is inserted into the interior of the mold. As the thermoplastic is injected, the push-pull rod 34 forces the sealing plate 33 to slide up and down along the inner surface of the sealing tube 31. When the sealing plate 33 slides downward, the I-plate 36 inside the one-way valve 32 slides downward along the outer surface of the limiting rod 37. The air inside the mold is injected downward into the interior of the sealing tube 31 from the inside of the mold through the through hole 39 inside the fixed plate 38. Then the sealing plate 33 slides upward, the air is squeezed out from the exhaust pipe 35, and the I-plate 36 slides upward along the outer surface of the limiting rod 37. The bottom of the through hole 39 is blocked, and this process is repeated. This solves the problem that the natural flow rate of air inside the traditional mold is slow, and air is easily retained inside the mold, affecting the mold structure.

[0051] The heat-conducting rod 40 is fixed on the upper surface of the die 8. As the mold is closed and the thermoplastic is injected, the heat of the thermoplastic is transferred outward to the inside of the curved tube 41 through the heat-conducting rod 40. The hydraulic oil inside the curved tube 41 expands due to the heat, and the push rod 42 extends from the inside of the curved tube 41. The push rod 42 presses downward against the top plate 2, so that the sealing effect is further increased. The mold achieves a certain self-locking closure through the heat of the thermoplastic itself. When the thermoplastic cools and solidifies, the hydraulic oil cools and shrinks, and the push rod 42 retracts into the inside of the curved tube 41. The equipment is automatically opened, which solves the problem of low automation of traditional molds.

[0052] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A thermoplastic panel injection mold with high stability, comprising a feed pipe (1), characterized in that: The bottom end of the feed pipe (1) is fixedly connected to a top plate (2), the inner surface of the top plate (2) is fixedly connected to a thermal expansion device (3), a sealing box (4) is provided at the bottom of the thermal expansion device (3), locking devices (5) are provided on both sides of the sealing box (4), a bottom plate (6) is provided at the bottom of the locking device (5), a suction device (7) is provided at the bottom of the bottom plate (6), a concave mold (8) is provided at the top of the concave mold (8), a convex mold (9) is provided at the top of the convex mold (9), and buffer devices (10) are provided on both sides of the convex mold (9); The locking device (5) comprises a screw rod (11), the outer surface of the screw rod (11) is fixedly connected to a compression spring (12), the right end of the compression spring (12) is fixedly connected to a slip ring (13), the outer surface of the right side of the slip ring (13) is rotatably connected to an adjusting nut (14), a connecting plate (15) is provided on the right side of the adjusting nut (14), latches (16) are provided on both sides of the connecting plate (15), and the bottom end of the latches (16) is rotatably connected to a movable rod (17); The outer surface of the right end of the screw rod (11) is fixedly connected to the inner surface of the connecting plate (15), the outer surface of the connecting plate (15) is fixedly connected to the outer surface of the sealing box (4), the inner surface of the adjusting nut (14) is threadedly connected to the outer surface of the screw rod (11), the outer surface of the slip ring (13) is rotatably connected to the bottom end of the movable rod (17), the outer surface of the latch (16) is clamped to the inner surfaces of the top plate (2) and the bottom plate (6), and the inner surface of the slip ring (13) is slidably connected to the outer surface of the screw rod (11); The outer surface of the concave mold (8) is fixedly connected to the inner surface of the sealing box (4), the inner surface of the sealing box (4) is fixedly connected to the outer surface of the male mold (9), the upper surface of the bottom plate (6) is fixedly connected to the lower surface of the sealing box (4), the upper surface of the sealing box (4) is fixedly connected to the lower surface of the top plate (2), and the thermal expansion device (3) is symmetrically mounted on both sides of the feed pipe (1); The suction device (7) comprises a suction pipe (30), the bottom end of the suction pipe (30) is fixedly connected to a sealing cylinder (31), the inner surface of the sealing cylinder (31) is movably connected to a one-way valve (32), the bottom of the one-way valve (32) is provided with a sealing plate (33), the lower surface of the sealing plate (33) is fixedly connected to a push-pull rod (34), and exhaust pipes (35) are provided on both sides of the push-pull rod (34); the outer surface of the suction pipe (30) is fixedly connected to the inner surface of the bottom plate (6), the top end of the suction pipe (30) is connected to the inside of the concave mold (8), the inside of the convex mold (9) is connected to the bottom end of the feed pipe (1), the lower surface of the bottom plate (6) is fixedly connected to the upper surface of the sealing cylinder (31), and the The inner surface of the sealing cylinder (31) is fixedly connected to the inner surface of the exhaust pipe (35), and the inner surface of the sealing cylinder (31) is slidably connected to the outer surfaces of the push-pull rod (34) and the sealing plate (33); the one-way valve (32) comprises an I-shaped plate (36), the inner surface of the I-shaped plate (36) is slidably connected to a limit rod (37), a fixing plate (38) is arranged outside the limit rod (37), and a through hole (39) is opened in the wall of the fixing plate (38); the outer surface of the fixing plate (38) is fixedly connected to the inner surface of the sealing cylinder (31), the top end of the limit rod (37) is fixedly connected to the inner surface of the sealing cylinder (31), and the outer surface of the fixing plate (38) is in contact with the outer surface of the I-shaped plate (36).

2. The thermoplastic panel injection mold with high stability according to claim 1, characterized in that: The buffer device (10) comprises a top nut (20), the inner surface of the top nut (20) is threadedly connected to a control rod (21), the outer surface of the control rod (21) is threadedly connected to a bottom nut (22), a top slide plate (23) is provided at the bottom of the bottom nut (22), the lower surface of the top slide plate (23) is fixedly connected to an air bag (24), the lower surface of the air bag (24) is fixedly connected to a bottom slide plate (25), the lower surface of the bottom slide plate (25) is fixedly connected to a spring sheet (26), and the bottom end of the spring sheet (26) is fixedly connected to a fixing cylinder (27).

3. The thermoplastic panel injection mold with high stability according to claim 2, characterized in that: The lower surface of the fixed cylinder (27) contacts the upper surface of the die (8); the inner surface of the fixed cylinder (27) is slidably connected to the outer surfaces of the top slide (23) and the bottom slide (25); the inner surface of the bottom slide (25) is slidably connected to the outer surface of the control rod (21); the outer surface of the control rod (21) is fixedly connected to the inner surface of the top slide (23); the control rod (21) passes through the top plate (2); the lower surface of the top plate (2) contacts the upper surface of the bottom nut (22); and the upper surface of the top plate (2) is rotatably connected to the lower surface of the top nut (20).

4. The thermoplastic panel injection mold with high stability according to claim 1, characterized in that: The thermal expansion device (3) comprises a heat-conducting rod (40), the top end of the heat-conducting rod (40) is fixedly connected to a bent pipe (41), the inner surface of the bent pipe (41) is slidably connected to a push rod (42), the bottom end of the push rod (42) is fixedly connected to the upper surface of the top plate (2), and the outer surface of the heat-conducting rod (40) is fixedly connected to the top plate (2) and the inner surface of the male mold (9).

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