Mold for processing plastic bucket

Abstract

The invention relates to the technical field of molds, in particular to a mold for processing a plastic bucket, which comprises an extruder and an injection molding machine, the injection molding machine is provided with an injection molding table, the injection molding table is provided with an injection molding assembly, the injection molding assembly is used for processing an opening part, a blow molding frame is arranged below the extruder, and a first mold and a second mold are slidably arranged on the blow molding frame. The blow molding frame is provided with a mold closing piece for driving the first mold to be close to or far away from the second mold in a reciprocating mode, the first mold and the second mold are located on the two sides of the discharging end of the extruder, mold blowing grooves are formed in the first mold and the second mold, and the mold blowing grooves in the first mold and the mold blowing grooves in the second mold jointly define a cavity used for forming a plastic barrel. A positioning groove used for containing the opening part is formed in a mold blowing groove of the first plastic mold, and a plastic suction part, a blow molding part and a hole opening part are arranged on the first plastic mold. The plastic bucket has the effect of improving the structural strength of the bucket body and the opening part of the plastic bucket.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a mold for processing plastic barrels. Background Art

[0002] In the industrial production of plastic barrels, mold technology is the core link in achieving efficient and low-cost manufacturing. Traditional plastic barrels are mostly produced using injection molding or blow molding processes, with the barrel body and opening structure formed by a one-piece mold.

[0003] Related art discloses a plastic bucket, referring to Figure 1 , comprising a barrel body 1 and an opening portion 2, wherein the opening portion 2 is integrally formed with an external thread 3.

[0004] However, when manufacturing openings (such as threaded openings) in conventional molds, the opening is typically integrally formed with the barrel body. However, the hot melt material extruded by the screw extruder expands differently at different locations within the blow mold cavity. This results in inconsistent wall thickness at different locations in the plastic barrel, particularly in the opening area, where the wall thickness can be too thin or too thick. A thin opening can also lead to insufficient mechanical strength. Frequent opening and closing can cause deformation, leading to thread failure and compromised sealing. These shortcomings are a result of the existing technology. Summary of the Invention

[0005] In order to improve the problem of too thin wall thickness at the opening of a plastic barrel during blow molding, the present application provides a mold for processing a plastic barrel.

[0006] The present application provides a mold for processing a plastic barrel using the following technical solution: A mold for processing a plastic barrel, comprising an extruder and an injection molding machine, wherein the injection molding machine is provided with an injection molding table, the injection molding table is provided with an injection molding assembly, the injection molding assembly is used to process an opening portion, a blow molding frame is provided below the extruder, a first mold and a second mold are slidably provided on the blow molding frame, and a clamping member for driving the first mold to reciprocate close to or away from the second mold is provided on the blow molding frame, the first mold and the second mold are located on both sides of the discharge end of the extruder, and the first mold and the second mold are both opened. A blow mold groove is provided, and the blow mold groove on the first mold and the blow mold groove on the second mold together form a cavity for forming a plastic barrel. A positioning groove for placing an opening is provided on the blow mold groove of the first mold. The first mold is provided with a blister, a blow mold and a hole opening member. The blister is used to discharge the air between the cavity and the hot melt material, the blow mold is used to inject air into the hot melt material between the first mold and the second mold, and the hole opening member is used to cut off the part of the opening blocked by the hot melt material.

[0007] By adopting the above technical solution, the worker first processes the opening part through the injection molding component, and then places the processed opening part on the positioning groove on the first mold. Then the extruder squeezes the hot melt material between the first mold and the second mold. Then the mold clamping part drives the first mold and the second mold to approach each other until the first mold and the second mold fit together. Then the suction molding part expels the air between the cavity and the hot melt material. At this time, the air pressure inside the hot melt material is higher than the air pressure outside it. The hot melt material continues to expand and gradually fits the opening part. Then the blow molding part injects air into the hot melt material, so that the hot The molten material further expands until the hot melt material completely fits the blow mold groove. Since the opening is made of the same material as the hot melt material, the hot melt material will completely stick to the opening. After that, the first mold and the second mold will cool the outside of the hot melt material through heat transfer, and the air injected by the blow molding part will cool the inside of the hot melt material. After a period of time, the opening part will cut off the hot melt material that blocks the opening. Since the opening is pre-produced, the structural strength of the opening can be controlled manually, thereby reducing the occurrence of insufficient structural strength of the opening of the produced plastic barrel.

[0008] Optionally, the injection molding component includes a base plate, an injection plate and a top sealing plate arranged on the injection molding table, the injection plate is located between the base plate and the top sealing plate, and the base plate, the injection plate and the top sealing plate are jointly provided with an injection groove forming an opening portion, an injection molding tube connected to the injection molding groove is provided on the base plate, and the end of the injection molding tube facing away from the base plate is connected to the injection molding machine, a clamping screw is rotatably provided on the base plate, a clamping groove for the rotation of the clamping screw is provided on the top sealing plate, and a horn nut is threadedly connected to the clamping screw, and the horn nut is used to abut the side of the top sealing plate facing away from the injection plate.

[0009] By adopting the above technical solution, workers place the patterned plate and the top sealing plate on the base plate in sequence, then turn the pressing screw and tighten the clevis nut, so that the base plate, the patterned plate and the top sealing plate together form an injection groove. After that, the injection molding machine injects molten material into the injection groove through the injection tube. When the material in the injection groove cools, an opening is formed. At this time, the resulting strength of the opening can be manually controlled, which is convenient for controlling the stability of the structural strength of the opening of the plastic barrels produced subsequently.

[0010] Optionally, the grained plate includes a first grained plate and a second grained plate, the first grained plate is detachably arranged on the second grained plate, and a grained groove for forming an external thread of the opening portion is commonly provided between the first grained plate and the second grained plate.

[0011] By adopting the above technical solution, after the material in the injection molding tank cools down and the worker removes the top sealing plate, the worker separates the first pattern plate and the second pattern plate, thereby facilitating the worker to quickly remove the opening portion.

[0012] Optionally, the mold closing part includes a first oil cylinder and a second oil cylinder arranged on the blow molding frame, the first oil cylinder and the second oil cylinder are electrically connected to a control system, the first mold is arranged on the piston rod of the first oil cylinder, and the blow molding frame is slidingly provided with a first guide column and a second guide column, the first guide column is arranged on the first mold, the second mold is arranged on the piston rod of the second oil cylinder, and the second guide column is arranged on the second mold.

[0013] By adopting the above technical solution, when the hot melt material extruded by the extruder reaches the designed length between the first mold and the second mold, the control system starts the first cylinder and the second cylinder, the piston rod of the first cylinder pushes the first mold, and the piston rod of the second cylinder pushes the second mold until the first mold and the second mold are in contact with each other. At this time, the hot melt material extruded by the extruder is pressed into the cavity, and at the same time, air is wrapped in the hot melt material in the cavity.

[0014] Optionally, the vacuum molded part includes a negative pressure cylinder arranged on the first mold, the interior of the negative pressure cylinder is hollow and one end is open, the open end of the negative pressure cylinder is connected to the positioning groove, and the blow molding frame is provided with a vacuum pump electrically connected to the control system, and an exhaust hose is connected between the air inlet end of the vacuum pump and the negative pressure cylinder.

[0015] By adopting the above technical solution, the control system starts the vacuum pump, and the vacuum pump draws out the air in the negative pressure cylinder through the exhaust hose. At this time, the air in the chamber is continuously drawn out by the negative pressure cylinder. Since the air in the hot melt material will not overflow, and the air pressure outside the hot melt material continues to decrease, the air in the hot melt material will expand, so that the hot melt material gradually approaches and eventually fits the opening.

[0016] Optionally, the blow molded part includes a middle tube coaxially arranged on the negative pressure cylinder, the middle tube passes through the closed end of the negative pressure cylinder, the negative pressure cylinder is coaxially provided with an outer tube, the outer tube is sleeved on the middle tube, the end of the outer tube facing away from the negative pressure cylinder is provided with a mounting ring plate, the middle tube is provided on the mounting ring plate, a puncture needle tube is coaxially slidingly arranged in the middle tube, a puncture cylinder electrically connected to a control system is provided on the mounting ring plate, the puncture needle tube is provided on the piston rod of the puncture cylinder, an air blower is provided on the blow molding frame, and an air hose is connected between the end of the puncture needle tube facing away from the first mold and the air outlet end of the air blower.

[0017] By adopting the above technical solution, when the expanded hot-melt material fits the opening, the control system starts the puncture cylinder, the piston rod of the puncture cylinder contracts, and the piston rod of the puncture cylinder drives the puncture needle tube to slide out of the opening. The sliding puncture needle tube will pierce the hot-melt material fitting the opening, and then the control system starts the air blower, and the air blower blows air of a certain temperature into the hot-melt material through the air hose and the puncture needle tube. The air blown by the air blower will cause the hot-melt material to further expand, and the expanded hot-melt material will completely fit the blow mold groove, and the discharged gas will continue to be extracted by the vacuum pump.

[0018] Optionally, a coaxial sliding sleeve on the middle tube is provided with a trigger ring, a connecting column is provided on the trigger ring, a retaining ring coaxial with the middle tube is provided on the connecting column, the retaining ring is used to abut the expanded hot-melt material, the inner diameter of the retaining ring is larger than the outer diameter of the puncture needle tube, and a compression spring is provided between the retaining ring and the middle tube. A pressure sensor electrically connected to the control system is provided on the middle tube, and the pressure sensor is located on the side of the trigger ring facing away from the connecting column.

[0019] By adopting the above technical solution, when the vacuum pump draws out the air from the outside of the hot-melt material, the hot-melt material will continue to expand, and the expanded hot-melt material will abut the baffle ring. The baffle ring pushes the trigger ring to slide through the connecting column until the trigger ring triggers the sensing end of the pressure sensor. During this process, the in-place compression spring is continuously compressed. At this time, the control system will start the puncture cylinder, so that the puncture needle can pierce the expanded hot-melt material at the opening, thereby facilitating the puncture needle to inject air into the hot-melt material. At the same time, the yield of the hot-melt material during the puncture process is improved, and the excess air flowing into the hot-melt material will flow into the negative pressure cylinder through the gap between the puncture needle and the hot-melt material, and be discharged by the vacuum pump.

[0020] The cam is provided with a plurality of cutting blades at one end of the slide tube facing the pressure sensor, and the plurality of cutting blades are evenly arranged on the slide tube around the pressure sensor. The end of the slide tube facing away from the cutting blade is provided with an end cutting ring plate, and an opening cylinder electrically connected to the control system is provided on the mounting ring plate. The piston rod of the opening cylinder is provided with a clamping block with a C-shaped cross section, and the edge of the end cutting ring plate is located in the C-shaped groove of the clamping block. The slide tube is provided with a guide column, and a straight groove is provided between the inner and outer walls of the outer tube and along the axial direction of the slide tube, and a spiral groove is provided between the inner and outer walls of the outer tube and along the axial direction of the outer tube, and the straight groove and the spiral groove are connected, and the guide column and the straight groove, and the guide column and the spiral groove are all slidably matched, and the length of the straight groove is greater than the thickness of the hot melt material.

[0021] By adopting the above technical solution, after the puncture needle tube is inflated for a period of time, the control system starts the hole-opening cylinder, the piston rod of the hole-opening cylinder extends, and the piston rod of the hole-opening cylinder pushes the end cutting ring plate through the block, and the end cutting ring plate drives the sliding tube to slide synchronously, and the sliding tube drives the guide column to slide synchronously. Under the guidance of the straight groove and the spiral groove, the cutter first pierces the hot-melt material, and then rotates with the sliding tube. The cutter rotating with the sliding tube will cut off the hot-melt material at the opening.

[0022] Optionally, a first sealing ring is provided between the sliding tube and the negative pressure cylinder, a second sealing ring is provided between the middle tube and the puncture needle tube, and a third sealing ring is provided between the sliding tube and the middle tube.

[0023] By adopting the above technical solution, the sealing performance is improved, the occurrence of air leakage is reduced, and air extraction and injection are facilitated.

[0024] Optionally, a puncture cone is provided at the end of the puncture needle tube facing away from the air inflation hose, and the diameter of the puncture cone gradually decreases along the direction from the puncture needle tube to the puncture cone. A ventilation groove is provided between the inner and outer side walls of the puncture needle tube, and an anti-slip plate is rotatably provided at the ventilation groove of the puncture needle tube. The anti-slip plate is close to the puncture cone, and the anti-slip plate is used to close the ventilation groove. A torsion spring is provided between the anti-slip plate and the puncture needle tube.

[0025] By adopting the above technical solution, the puncture cone makes it easier for the puncture needle to pierce the hot-melt material. At the same time, when the air in the puncture needle flows into the hot-melt material from the ventilation groove, the anti-slip plate will be pushed to expand by the airflow, and the torsion spring will be deformed. The expanded anti-slip plate will prevent the hot-melt material cut by the cutter from escaping from the puncture needle, reducing the risk of the cut hot-melt material accidentally falling into the plastic barrel formed by the hot-melt material. When the air injection in the puncture needle stops, the torsion spring resumes its deformation, the anti-slip plate is reset, and the worker can remove the cut hot-melt material.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The worker first processes the opening part through the injection molding component, and then places the processed opening part on the positioning groove on the first mold. Then the extruder squeezes the hot melt material between the first mold and the second mold. Then the mold clamp drives the first mold and the second mold to move closer to each other until the first mold and the second mold fit together. Then the blister expel the air between the cavity and the hot melt material. At this time, the air pressure inside the hot melt material is higher than the air pressure outside it. The hot melt material continues to expand and gradually fits the opening part. Then the blow molding part will inject air into the hot melt material, so that the hot melt material further The hot melt material will expand gradually until it completely fits the blow mold groove. Since the opening is made of the same material as the hot melt material, the hot melt material will completely adhere to the opening. After that, the first mold and the second mold will cool the outside of the hot melt material through heat transfer, and the air injected by the blow molding will cool the inside of the hot melt material. After a period of time, the opening piece will remove the hot melt material blocking the opening. Since the opening is pre-produced, the structural strength of the opening can be manually controlled, thus reducing the occurrence of insufficient structural strength of the opening of the produced plastic barrel. 2. When the vacuum pump extracts the air from the outside of the hot-melt material, the hot-melt material will continue to expand. The expanded hot-melt material will abut the baffle ring, which will push the trigger ring to slide through the connecting column until the trigger ring triggers the sensing end of the pressure sensor. During this process, the in-place compression spring is continuously compressed. At this time, the control system will activate the puncture cylinder, so that the puncture needle can pierce the expanded hot-melt material at the opening, thereby facilitating the puncture needle to inject air into the hot-melt material, and at the same time, improving the yield of the hot-melt material during the puncture process. The excess air that flows into the hot-melt material will flow into the negative pressure cylinder through the gap between the puncture needle and the hot-melt material and be discharged by the vacuum pump. 3. When the expanded hot-melt material fits the opening, the control system starts the puncture cylinder, the piston rod of the puncture cylinder contracts, and the piston rod of the puncture cylinder drives the puncture needle tube to slide out of the opening. The sliding puncture needle tube will pierce the hot-melt material fitting the opening, and then the control system starts the air blower, which blows air of a certain temperature into the hot-melt material through the air hose and the puncture needle tube. The air blown by the air blower will cause the hot-melt material to further expand, and the expanded hot-melt material will completely fit the blow mold groove, and the discharged gas will continue to be extracted by the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram in the background technology.

[0028] Figure 2 It is a structural diagram of an embodiment of the present application.

[0029] Figure 3 It is a structural diagram used to reflect the positional relationship between the injection molding machine, the injection molding table and the base substrate in the embodiment of the present application.

[0030] Figure 4 It is a cross-sectional view used to reflect the positional relationship between the top sealing plate, the injection molding tube and the compression screw in the embodiment of the present application.

[0031] Figure 5 It is a cross-sectional view used to illustrate the positional relationship between the first mold, the second mold and the extruder in the embodiment of the present application.

[0032] Figure 6 It is a cross-sectional view used to illustrate the positional relationship between the first mold and the cutting knife when the first mold is combined with the second mold in the embodiment of the present application.

[0033] Figure 7 yes Figure 6 Enlarged view of part A.

[0034] Figure 8 It is a structural diagram used to reflect the positional relationship between the pressure sensor, the retaining ring and the outer tube in the embodiment of the present application.

[0035] Explanation of reference numerals: 1. barrel; 2. opening; 3. external thread; 4. extruder; 5. injection molding machine; 6. injection molding table; 7. injection molding assembly; 71. bottom plate; 72. pattern plate; 721. first pattern plate; 722. second pattern plate; 723. pattern groove; 73. top sealing plate; 74. injection molding groove; 75. injection molding tube; 76. pressing screw; 77. pressing groove; 78. clevis nut; 8. blow molding Plastic frame; 9, first mold; 10, second mold; 11, mold clamping part; 111, first oil cylinder; 112, second oil cylinder; 113, first guide post; 114, second guide post; 12, blow mold groove; 13, cavity; 14, positioning groove; 15, vacuum part; 151, negative pressure cylinder; 152, vacuum pump; 153, exhaust hose; 16, blow mold part; 161, middle tube; 162, outer tube; 16 3. Install the ring plate; 164. Puncture needle tube; 165. Puncture cylinder; 166. Air blower; 167. Air blower hose; 17. Hole opening piece; 171. Slide tube; 172. Cutter; 173. End cutting ring plate; 174. Hole opening cylinder; 175. Block; 176. Guide post; 177. Straight groove; 178. Spiral groove; 18. Trigger ring; 19. Connecting post; 20. Retaining ring; 21. In place Compression spring; 22. Pressure sensor; 23. First sealing ring; 24. Second sealing ring; 25. Third sealing ring; 26. Puncture cone; 27. Vent groove; 28. Anti-slip plate; 29. Torsion spring; 30. Water cooler; 31. Water cooling hose; 32. Channel; 33. Fixed plate; 34. Cutting knife; 35. Vertical plate; 36. Pressing column; 37. Pressing plate; 38. Closing compression spring; 39. Anti-slip block. DETAILED DESCRIPTION

[0036] The following is combined with Figure 2-Figure 8 This application is described in further detail.

[0037] The embodiment of the present application discloses a mold for processing a plastic barrel.

[0038] Reference Figure 2 A mold for processing a plastic barrel includes an extruder 4 and an injection molding machine 5. An injection molding table 6 is arranged next to the injection molding machine 5. An injection molding component 7 is arranged on the injection molding table 6. The injection molding component 7 is used to process an opening 2. Reference Figure 3 and Figure 4 The injection molding assembly 7 includes a bottom base plate 71, an injection plate 72 and a top sealing plate 73 arranged on the injection molding table 6. The injection plate 72 is located between the bottom base plate 71 and the top sealing plate 73. The bottom base plate 71, the injection plate 72 and the top sealing plate 73 are jointly provided with an injection molding groove 74 forming the opening portion 2. An injection molding tube 75 connected to the injection molding groove 74 is bolted to the bottom base plate 71.

[0039] Reference Figure 3 and Figure 4The end of the injection tube 75 facing away from the bottom base plate 71 is connected to the injection molding machine 5. A clamping screw 76 is rotatably connected to the bottom base plate 71. A clamping groove 77 for the clamping screw 76 to rotate is provided on the top sealing plate 73. A clevis nut 78 is threadedly connected to the clamping screw 76. The clevis nut 78 is used to abut the side of the top sealing plate 73 facing away from the pattern plate 72.

[0040] Reference Figure 3 and Figure 4 The pattern plate 72 includes a first pattern plate 721 and a second pattern plate 722. The first pattern plate 721 is bolted to the second pattern plate 722. A pattern groove 723 for forming the external thread 3 of the opening 2 is provided between the first pattern plate 721 and the second pattern plate 722.

[0041] The worker first uses bolts to assemble the first pattern plate 721 and the second pattern plate 722 together to form the pattern plate 72, and then places the pattern plate 72 and the top sealing plate 73 on the bottom base plate 71 in sequence. After that, the worker turns the tightening screw 76 and tightens the clevis nut 78, so that the bottom base plate 71, the pattern plate 72 and the top sealing plate 73 together form the injection groove 74.

[0042] Finally, the injection molding machine 5 injects the molten material into the injection molding groove 74 through the injection molding tube 75. When the material in the injection molding groove 74 cools down, the worker disassembles the pattern plate 72 and the top sealing plate 73, and takes out the opening 2 formed after cooling. The bottom of the opening 2 is integrally formed with a plurality of protrusions on one side (not shown in the figure), which are used to be prefabricated on the barrel body 1.

[0043] Reference Figure 2 and Figure 5 A blow molding rack 8 is arranged below the extruder 4, and a first mold 9 and a second mold 10 are horizontally slidably arranged on the blow molding rack 8. A water cooler 30 is arranged on the blow molding rack 8, and the water cooler 30 is electrically connected to the control system. Water cooling hoses 31 are connected between the water cooler 30 and the first mold 9 and between the water cooler 30 and the second mold 10. Channels 32 for cooling water flow are opened in the first mold 9 and the second mold 10. A clamping part 11 for driving the first mold 9 to reciprocate close to or away from the second mold 10 is arranged on the blow molding rack 8.

[0044] Reference Figure 2 and Figure 5 The mold closing part 11 includes a first oil cylinder 111 and a second oil cylinder 112 bolted to the blow molding frame 8. The first oil cylinder 111 and the second oil cylinder 112 are electrically connected to the control system. The first mold 9 is bolted to the piston rod of the first oil cylinder 111. The blow molding frame 8 is horizontally slidably arranged with a first guide column 113 and a second guide column 114. The first guide column 113 is welded to the first mold 9. The second mold 10 is bolted to the piston rod of the second oil cylinder 112, and the second guide column 114 is welded to the second mold 10.

[0045] Reference Figure 2 、 Figure 5 and Figure 6 The first mold 9 and the second mold 10 are located on both sides of the discharge end of the extruder 4. The first mold 9 and the second mold 10 are both provided with a blow mold groove 12. The blow mold groove 12 on the first mold 9 and the blow mold groove 12 on the second mold 10 together form a cavity 13 for forming a plastic barrel. The blow mold groove 12 of the first mold 9 is provided with a positioning groove 14 for placing the opening part 2.

[0046] Reference Figure 5 and Figure 6 A fixing plate 33 is welded to the top of the first mold 9 and the second mold 10. The fixing plate 33 is below the discharge end of the extruder 4. A cutting knife 34 is bolted to the fixing plate 33. When the first mold 9 is closed on the second mold 10, the cutting knife 34 on the first mold 9 abuts against the cutting knife 34 on the second mold 10.

[0047] Reference Figure 6 , both fixed plates 33 are welded with vertical plates 35, and pressing columns 36 are slidably arranged on the vertical plates 35, and pressing plates 37 are welded on the pressing columns 36. A closing compression spring 38 is supported between the pressing plate 37 and the vertical plates 35, and an anti-slip block 39 is welded on the pressing column 36 on the side of the vertical plate 35 facing away from the closing compression spring 38.

[0048] The worker places the qualified opening part 2 on the positioning groove 14 on the first mold 9, and then the extruder 4 processes the material into a hot melt state. The hot melt material is extruded from the extrusion end of the extruder 4 in a tubular shape and continues to descend. The descending hot melt is located between the first mold 9 and the second mold 10 until it reaches the appropriate position.

[0049] The control system activates the first oil cylinder 111 and the second oil cylinder 112. The piston rod of the first oil cylinder 111 extends and pushes the first mold 9 to slide. The piston rod of the second oil cylinder 112 extends and pushes the second mold 10 to slide. The first mold 9 and the second mold 10 continue to approach each other until both pressing plates 37 abut against the tubular hot melt material.

[0050] As the first mold 9 and the second mold 10 continue to approach each other, the two pressing plates 37 will squeeze the two sides of the tubular hot melt material inward until the first mold 9 is closed on the second mold 10. At this time, the two cutting knives 34 will cut the hot melt material.

[0051] At the same time, the two pressing plates 37 press the cut ends of the tubular hot-melt material together. During this process, the closing compression spring 38 is continuously compressed, and a section of hollow hot-melt material is clamped in the cavity 13 between the first mold 9 and the second mold 10.

[0052] Reference Figure 5 and Figure 7A blister 15 is arranged on the first mold 9. The blister 15 is used to exhaust the air between the chamber 13 and the hot melt material. The blister 15 includes a negative pressure cylinder 151 welded to the first mold 9. The interior of the negative pressure cylinder 151 is hollow and one end is open. The open end of the negative pressure cylinder 151 is connected to the positioning groove 14. An exhaust fan 152 electrically connected to the control system is bolted to the blow molding frame 8. An exhaust hose 153 is connected between the air inlet end of the exhaust fan 152 and the negative pressure cylinder 151.

[0053] Reference Figure 5 and Figure 7 A blow molding part 16 is arranged on the first mold 9. The blow molding part 16 is used to inject air into the hot melt material between the first mold 9 and the second mold 10. The blow molding part 16 includes a middle tube 161 coaxially arranged on the negative pressure cylinder 151. The middle tube 161 passes through the closed end of the negative pressure cylinder 151. An outer tube 162 is coaxially bolted to the negative pressure cylinder 151. The outer tube 162 is sleeved outside the middle tube 161.

[0054] Reference Figure 7 and Figure 8 The end of the outer tube 162 facing away from the negative pressure cylinder 151 is welded with a mounting ring plate 163, the end of the middle tube 161 is welded to the mounting ring plate 163, and a puncture needle tube 164 is coaxially slidably provided in the middle tube 161. A second sealing ring 24 is arranged between the middle tube 161 and the puncture needle tube 164. The second sealing ring 24 can be made of rubber material. A puncture cylinder 165 electrically connected to the control system is bolted to the mounting ring plate 163, and the puncture needle tube 164 is bolted to the piston rod of the puncture cylinder 165.

[0055] Reference Figure 5 and Figure 7 An air blower 166 is bolted to the blow molding frame 8, and an air hose 167 is connected between the end of the puncture needle tube 164 facing away from the first mold 9 and the air outlet end of the air blower 166. A trigger ring 18 is coaxially slidingly sleeved on the middle tube 161, and a connecting column 19 is welded on the trigger ring 18. A retaining ring 20 coaxial with the middle tube 161 is welded on the connecting column 19. The retaining ring 20 is used to abut the expanding hot-melt material.

[0056] Reference Figure 7 and Figure 8 A puncture cone 26 is welded to the end of the puncture needle tube 164 facing away from the air hose 167. The diameter of the puncture cone 26 gradually decreases along the direction from the puncture needle tube 164 to the puncture cone 26. A ventilation groove 27 is provided between the inner and outer side walls of the puncture needle tube 164. An anti-slip plate 28 is rotatably connected to the ventilation groove 27 of the puncture needle tube 164. The anti-slip plate 28 is close to the puncture cone 26 and is used to close the ventilation groove 27.

[0057] Reference Figure 7 and Figure 8A torsion spring 29 is arranged between the anti-slip plate 28 and the puncture needle tube 164. The inner diameter of the retaining ring 20 is larger than the outer diameter of the puncture needle tube 164. A compression spring 21 is provided between the retaining ring 20 and the middle tube 161. A pressure sensor 22 electrically connected to the control system is bolted to the middle tube 161. The pressure sensor 22 is located on the side of the trigger ring 18 facing away from the connecting column 19.

[0058] The control system starts the vacuum pump 152, and the vacuum pump 152 draws out the air in the negative pressure cylinder 151 through the exhaust hose 153. Since the negative pressure cylinder 151 is connected to the chamber 13, the internal air of the hollow hot melt material inside will not overflow, so the air pressure difference inside and outside the hot melt material will cause the hot melt material to continue to expand, and the expanded hot melt material will gradually fit the retaining ring 20 at the opening 2.

[0059] The retaining ring 20 pushes the trigger ring 18 to slide through the connecting column 19. The sliding trigger ring 18 will trigger the sensing end of the pressure sensor 22. At this time, the control system starts the puncture cylinder 165, and the piston rod of the puncture cylinder 165 contracts. The piston rod of the puncture cylinder 165 drives the puncture needle tube 164 to slide, and the sliding puncture needle tube 164 pierces the expanded hot-melt material through the puncture cone 26. Then the control system starts the air blower 166, and the air blower 166 injects air into the puncture needle tube 164 through the air hose 167.

[0060] When the air in the puncture needle tube 164 flows into the hot melt material through the ventilation groove 27, the anti-slip plate 28 will be pushed to expand by the airflow, and the torsion spring 29 will be deformed. At this time, the expanded hot melt material will expand again until the hot melt material completely fits the blow mold groove 12.

[0061] At the same time, the excess air flowing into the hot melt material will flow into the negative pressure cylinder 151 through the gap between the puncture needle tube 164 and the hot melt material, and will be discharged by the vacuum fan 152. The secondary expanded hot melt material will wrap the protrusion on the opening part 2, so that the opening part 2 will be stuck in the hot melt material.

[0062] Reference Figure 7 and Figure 8 The first mold 9 is provided with an opening member 17, which is used to cut off the portion of the opening 2 blocked by the hot-melt material. The opening member 17 includes a sliding tube 171 coaxially slidably sleeved on the middle tube 161. A third sealing ring 25 is arranged between the sliding tube 171 and the middle tube 161. The third sealing ring 25 can be made of rubber material. The sliding tube 171 slides through the closed end of the negative pressure cylinder 151.

[0063] Reference Figure 7 and Figure 8A first sealing ring 23 is arranged between the sliding tube 171 and the negative pressure cylinder 151. The first sealing ring 23 can be made of rubber material. A plurality of cutters 172 are welded to one end of the sliding tube 171 facing the pressure sensor 22. The plurality of cutters 172 are evenly arranged on the sliding tube 171 in the circumferential direction.

[0064] Reference Figure 7 and Figure 8 An end cutting ring plate 173 is welded to the end of the sliding tube 171 facing away from the cutter 172, and an opening cylinder 174 electrically connected to the control system is bolted to the mounting ring plate 163. A clamping block 175 with a C-shaped cross section is welded to the piston rod of the opening cylinder 174. The edge of the end cutting ring plate 173 is located in the C-shaped groove of the clamping block 175, and a guide column 176 is welded to the sliding tube 171.

[0065] Reference Figure 7 and Figure 8 A straight groove 177 is provided between the inner and outer walls of the outer tube 162 and along the axial direction of the slide tube 171, and a spiral groove 178 is provided between the inner and outer walls of the outer tube 162 and along the axial direction of the outer tube 162. The straight groove 177 and the spiral groove 178 are connected, and the guide column 176 and the straight groove 177, as well as the guide column 176 and the spiral groove 178 are all slidably fitted. The length of the straight groove 177 is greater than the thickness of the hot melt material.

[0066] After the puncture needle tube 164 is inflated for a period of time, the control system starts the hole-opening cylinder 174, and the piston rod of the hole-opening cylinder 174 extends. The piston rod of the hole-opening cylinder 174 pushes the end cutting ring plate 173 through the block 175, and the end cutting ring plate 173 drives the sliding tube 171 to slide synchronously, and the sliding tube 171 drives the guide column 176 to slide synchronously. Under the guidance of the straight groove 177, the cutter 172 first slides along the axial direction of the sliding tube 171 to pierce the hot-melt material.

[0067] Under the guidance of the spiral groove 178, the cutter 172 rotates with the slide tube 171. The rotating cutter 172 will cut off the hot melt material blocking the opening 2. Then the control system starts the water cooler 30. The water cooler 30 cools down the first mold 9 and the second mold 10 through the water cooling hose 31, so that the hot melt material fitting the blow mold groove 12 is quickly cooled, so that the opening 2 and the cooled hot melt material form a plastic barrel.

[0068] The implementation principle of a mold for processing a plastic barrel in an embodiment of the present application is as follows: a worker first uses bolts to assemble a first pattern plate 721 and a second pattern plate 722 together to form an injection plate 72, and then places the injection plate 72 and the top sealing plate 73 on the bottom base plate 71 in sequence. Afterwards, the worker turns the tightening screw 76 and tightens the clevis nut 78, so that the bottom base plate 71, the injection plate 72 and the top sealing plate 73 together form an injection groove 74.

[0069] Finally, the injection molding machine 5 injects the molten material into the injection molding groove 74 through the injection molding tube 75. When the material in the injection molding groove 74 cools down, the worker disassembles the pattern plate 72 and the top sealing plate 73, and takes out the opening 2 formed after cooling. The bottom of the opening 2 will have several protrusions integrally formed on one side, and the protrusions are used to prefabricate on the barrel body 1.

[0070] The worker places the qualified opening part 2 on the positioning groove 14 on the first mold 9, and then the extruder 4 processes the material into a hot melt state. The hot melt material is extruded from the extrusion end of the extruder 4 in a tubular shape and continues to descend. The descending hot melt is located between the first mold 9 and the second mold 10 until it reaches the appropriate position.

[0071] The control system activates the first oil cylinder 111 and the second oil cylinder 112. The piston rod of the first oil cylinder 111 extends and pushes the first mold 9 to slide. The piston rod of the second oil cylinder 112 extends and pushes the second mold 10 to slide. The first mold 9 and the second mold 10 continue to approach each other until both pressing plates 37 abut against the tubular hot melt material.

[0072] As the first mold 9 and the second mold 10 continue to approach each other, the two pressing plates 37 will squeeze the two sides of the tubular hot melt material inward until the first mold 9 is closed on the second mold 10. At this time, the two cutting knives 34 will cut the hot melt material.

[0073] At the same time, the two pressing plates 37 press the cut ends of the tubular hot-melt material together. During this process, the closing compression spring 38 is continuously compressed, and a section of hollow hot-melt material is clamped in the cavity 13 between the first mold 9 and the second mold 10.

[0074] The control system starts the vacuum pump 152, and the vacuum pump 152 draws out the air in the negative pressure cylinder 151 through the exhaust hose 153. Since the negative pressure cylinder 151 is connected to the chamber 13, the internal air of the hollow hot melt material inside will not overflow, so the air pressure difference inside and outside the hot melt material will cause the hot melt material to continue to expand, and the expanded hot melt material will gradually fit the retaining ring 20 at the opening 2.

[0075] The retaining ring 20 pushes the trigger ring 18 to slide through the connecting column 19. The sliding trigger ring 18 will trigger the sensing end of the pressure sensor 22. At this time, the control system starts the puncture cylinder 165, and the piston rod of the puncture cylinder 165 contracts. The piston rod of the puncture cylinder 165 drives the puncture needle tube 164 to slide, and the sliding puncture needle tube 164 pierces the expanded hot-melt material through the puncture cone 26. Then the control system starts the air blower 166, and the air blower 166 injects air into the puncture needle tube 164 through the air hose 167.

[0076] When the air in the puncture needle tube 164 flows into the hot melt material through the ventilation groove 27, the anti-slip plate 28 will be pushed to expand by the airflow, and the torsion spring 29 will be deformed. At this time, the expanded hot melt material will expand again until the hot melt material completely fits the blow mold groove 12.

[0077] At the same time, the excess air flowing into the hot melt material will flow into the negative pressure cylinder 151 through the gap between the puncture needle tube 164 and the hot melt material, and will be discharged by the vacuum fan 152. The secondary expanded hot melt material will wrap the protrusion on the opening part 2, so that the opening part 2 will be stuck in the hot melt material.

[0078] After the puncture needle tube 164 is inflated for a period of time, the control system starts the hole-opening cylinder 174, and the piston rod of the hole-opening cylinder 174 extends. The piston rod of the hole-opening cylinder 174 pushes the end cutting ring plate 173 through the block 175, and the end cutting ring plate 173 drives the sliding tube 171 to slide synchronously, and the sliding tube 171 drives the guide column 176 to slide synchronously. Under the guidance of the straight groove 177, the cutter 172 first slides along the axial direction of the sliding tube 171 to pierce the hot-melt material.

[0079] Under the guidance of the spiral groove 178, the cutter 172 rotates with the slide tube 171. The rotating cutter 172 will cut off the hot melt material blocking the opening 2. Then the control system starts the water cooler 30. The water cooler 30 cools down the first mold 9 and the second mold 10 through the water cooling hose 31, so that the hot melt material fitting the blow mold groove 12 is quickly cooled, so that the opening 2 and the cooled hot melt material form a plastic barrel.

[0080] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A mold for processing a plastic barrel, comprising an extruder (4) and an injection molding machine (5), characterized in that: The injection molding machine (5) is provided with an injection molding table (6), and the injection molding table (6) is provided with an injection molding assembly (7), and the injection molding assembly (7) is used to process the opening portion (2). A blow molding frame (8) is provided below the extruder (4), and a first mold (9) and a second mold (10) are slidably provided on the blow molding frame (8), and a clamping member (11) is provided on the blow molding frame (8) for driving the first mold (9) to reciprocate close to or away from the second mold (10). The first mold (9) and the second mold (10) are located on both sides of the discharge end of the extruder (4), and a blow molding groove (12) is provided on the first mold (9). ) and the blow mold groove (12) on the second mold (10) together form a cavity (13) for forming a plastic barrel, the blow mold groove (12) of the first mold (9) is provided with a positioning groove (14) for placing the opening portion (2), the first mold (9) is provided with a suction molding part (15), a blow molding part (16) and an opening part (17), the suction molding part (15) is used to discharge the air between the cavity (13) and the hot melt material, the blow molding part (16) is used to inject air into the hot melt material between the first mold (9) and the second mold (10), and the opening part (17) is used to cut off the part of the opening portion (2) blocked by the hot melt material.

2. The mold for processing a plastic barrel according to claim 1, characterized in that: The injection molding assembly (7) comprises a bottom substrate (71), an injection molding plate (72) and a top sealing plate (73) arranged on the injection molding table (6); the injection molding plate (72) is located between the bottom substrate (71) and the top sealing plate (73); the bottom substrate (71), the injection molding plate (72) and the top sealing plate (73) are all provided with an injection molding groove (74) forming an opening (2); the bottom substrate (71) is provided with an injection molding pipe communicating with the injection molding groove (74); (75), one end of the injection tube (75) facing away from the bottom substrate (71) is connected to the injection molding machine (5), a clamping screw (76) is rotatably provided on the bottom substrate (71), a clamping groove (77) for the clamping screw (76) to rotate is provided on the top sealing plate (73), a ram's horn nut (78) is threadedly connected to the clamping screw (76), and the ram's horn nut (78) is used to abut against the side of the top sealing plate (73) facing away from the injection plate (72).

3. The mold for processing a plastic barrel according to claim 2, characterized in that: The injection plate (72) comprises a first injection plate (721) and a second injection plate (722); the first injection plate (721) is detachably mounted on the second injection plate (722); and an injection groove (723) for forming an external thread (3) of the opening portion (2) is provided between the first injection plate (721) and the second injection plate (722).

4. The mold for processing a plastic barrel according to claim 1, characterized in that: The mold clamping part (11) includes a first oil cylinder (111) and a second oil cylinder (112) arranged on the blow molding frame (8), the first oil cylinder (111) and the second oil cylinder (112) are both electrically connected to a control system, the first mold (9) is arranged on the piston rod of the first oil cylinder (111), and a first guide column (113) and a second guide column (114) are slidably arranged on the blow molding frame (8), the first guide column (113) is arranged on the first mold (9), the second mold (10) is arranged on the piston rod of the second oil cylinder (112), and the second guide column (114) is arranged on the second mold (10).

5. The mold for processing a plastic barrel according to claim 1, characterized in that: The blister (15) includes a negative pressure cylinder (151) arranged on the first mold (9), the interior of the negative pressure cylinder (151) is hollow and one end is open, the open end of the negative pressure cylinder (151) is connected to the positioning groove (14), and the blow molding frame (8) is provided with an air pump (152) electrically connected to the control system, and an exhaust hose (153) is connected between the air inlet end of the air pump (152) and the negative pressure cylinder (151).

6. The mold for processing a plastic barrel according to claim 5, characterized in that: The blow molded part (16) includes a middle tube (161) coaxially arranged on the negative pressure cylinder (151), the middle tube (161) passes through the closed end of the negative pressure cylinder (151), an outer tube (162) is coaxially arranged on the negative pressure cylinder (151), the outer tube (162) is sleeved on the middle tube (161), and a mounting ring plate (163) is provided at one end of the outer tube (162) facing away from the negative pressure cylinder (151), and the middle tube (161) is arranged on the mounting ring plate (163). A puncture needle tube (164) is coaxially slidably provided in the middle tube (161), a puncture cylinder (165) electrically connected to the control system is provided on the mounting ring plate (163), the puncture needle tube (164) is provided on the piston rod of the puncture cylinder (165), an air blower (166) is provided on the blow molding frame (8), and an air hose (167) is connected between the end of the puncture needle tube (164) facing away from the first mold (9) and the air outlet end of the air blower (166).

7. The mold for processing a plastic barrel according to claim 6, characterized in that: A trigger ring (18) is provided on the coaxial sliding sleeve of the middle tube (161), a connecting column (19) is provided on the trigger ring (18), a retaining ring (20) coaxial with the middle tube (161) is provided on the connecting column (19), the retaining ring (20) is used to abut against the expanded hot-melt material, the inner diameter of the retaining ring (20) is larger than the outer diameter of the puncture needle tube (164), a compression spring (21) is provided between the retaining ring (20) and the middle tube (161), and a pressure sensor (22) electrically connected to the control system is provided on the middle tube (161), and the pressure sensor (22) is located on the side of the trigger ring (18) facing away from the connecting column (19).

8. The mold for processing a plastic barrel according to claim 7, characterized in that: The opening member (17) includes a sliding tube (171) coaxially slidably sleeved on the middle tube (161), the sliding tube (171) slides through the closed end of the negative pressure cylinder (151), a plurality of cutters (172) are provided on one end of the sliding tube (171) facing the pressure sensor (22), and the plurality of cutters (172) are uniformly arranged on the sliding tube (171) in the circumferential direction, an end cutting ring plate (173) is provided on one end of the sliding tube (171) facing away from the cutters (172), an opening cylinder (174) electrically connected to the control system is provided on the mounting ring plate (163), and a block (175) with a C-shaped cross section is provided on the piston rod of the opening cylinder (174). The edge of the end cutting ring plate (173) is located in the C-shaped groove of the block (175), and a guide column (176) is provided on the slide tube (171). A straight groove (177) is provided between the inner and outer side walls of the outer tube (162) and along the axial direction of the slide tube (171). A spiral groove (178) is provided between the inner and outer side walls of the outer tube (162) and along the axial direction of the outer tube (162). The straight groove (177) and the spiral groove (178) are connected. The guide column (176) and the straight groove (177) as well as the guide column (176) and the spiral groove (178) are both slidably matched. The length of the straight groove (177) is greater than the thickness of the hot melt material.

9. The mold for processing a plastic barrel according to claim 8, characterized in that: A first sealing ring (23) is provided between the sliding tube (171) and the negative pressure cylinder (151), a second sealing ring (24) is provided between the middle tube (161) and the puncture needle tube (164), and a third sealing ring (25) is provided between the sliding tube (171) and the middle tube (161).

10. The mold for processing a plastic barrel according to claim 8, characterized in that: A puncture cone (26) is provided at one end of the puncture needle tube (164) facing away from the air hose (167), and the diameter of the puncture cone (26) gradually decreases along the direction from the puncture needle tube (164) to the puncture cone (26). A ventilation groove (27) is provided between the inner and outer side walls of the puncture needle tube (164), and an anti-slip plate (28) is rotatably provided at the ventilation groove (27) of the puncture needle tube (164). The anti-slip plate (28) is close to the puncture cone (26), and the anti-slip plate (28) is used to close the ventilation groove (27). A torsion spring (29) is provided between the anti-slip plate (28) and the puncture needle tube (164).

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