Device for multi-section hot melting of plastic
By designing a device for multi-stage hot melting of plastics and adjusting pressure with pneumatic proportional valves, the problem of difficulty in controlling hot melt processing pressure in the prior art is solved, and safe and precise hot melt processing of plastic parts is achieved, and damage and economic losses are reduced.
Patent Information
- Application Number
- CN202421857948.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The prior art is difficult to effectively control the downforce degree of each processing stage during the hot melt processing of plastic parts, resulting in the possibility of deformation of plastic parts during the hot melting process, causing damage and economic losses.
A device for multi-stage hot melting of plastic is designed, including a hot melt connection mechanism for the valve seat and the inner liner. Components such as cylinders and inner liner hot melt control cylinders are hoisted through the valve seat. The air outlet pressure is adjusted using a pneumatic proportional valve to ensure rapid melting in the early stage of heating, and the pressure gradually decreases in the later stage to prevent the plastic parts from deforming.
Through controllable pressure adjustment, the damage caused by uneven pressure of the plastic parts due to hot melt is significantly reduced, economic losses are reduced, and processing accuracy is improved.
Smart Images
Figure CN222844815U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hot-melt processing of plastic parts, in particular to a device for multi-stage hot-melt of plastics. Background Art
[0002] Plastic containers are hollow blow-molded containers, which are processed by hollow molding. There are open plastic barrels and cans and closed plastic barrels and cans. Open plastic barrels and cans are mainly used to hold solid chemicals, food, medicines, etc.; closed plastic barrels and cans are mainly used to hold liquid substances. It has the characteristics of light weight, not easy to break, corrosion resistance, and recyclability. Parts of plastic parts need to maintain a certain pressure during the hot melt process. Since the plastic melts slowly in the early stage of hot melt, high pressure needs to be maintained for a considerable period of time under normal conditions to ensure the progress of the early hot melt work. However, since the existing technology is not convenient for controlling the downward pressure at each processing stage, if the current pressure is maintained after the plastic melts to a certain extent, the plastic part will be deformed as a whole, causing damage to the plastic part and causing economic losses.
[0003] Therefore, a device for multi-stage hot melting of plastics is provided to solve the above problems. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] The utility model provides a device for multi-stage hot melting of plastics, aiming to solve the problem that the prior art mentioned in the background technology is inconvenient to control the downward pressure at each processing stage in the hot melting processing of plastic parts. When the plastic is melted to a certain extent, if the current pressure is still maintained, the plastic part will be deformed as a whole, thereby causing damage to the plastic part and causing economic losses.
[0006] (II) Technical solution
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for multi-stage hot melting of plastics, comprising a bracket and a hot melting connection mechanism installed on the bracket for hot melting connection of a valve seat and an inner tank:
[0008] In order to prevent the inner liner from being damaged due to uneven pressure during hot melting, the hot melt connection mechanism includes a valve seat hoisting cylinder installed on the bracket and a valve seat heating seat arranged on one side, a valve seat hot melt control cylinder is arranged on one side of the valve seat heating seat, a valve seat clamping tooling for clamping the valve seat is installed on the output end of the valve seat hot melt control cylinder, an inner liner hot melt control cylinder is arranged on one side of the valve seat hot melt control cylinder, an inner liner heating seat is installed on the output end of the inner liner hot melt control cylinder, and an inner liner bottom support is installed at the bottom of the bracket, the valve seat to be hot melted is placed on the valve seat heating seat through the valve seat hoisting cylinder, the valve seat heating seat heats and hot melts the bottom of the valve seat, and then the valve seat hot melt control cylinder controls the valve seat clamping tooling to clamp the valve seat, and compressed air is connected to the valve seat hot melt control cylinder through the pneumatic proportional valve, and the proportional valve outlet pressure is adjusted to ensure It melts quickly in the early stage of heating, and the pressure gradually decreases in the later stage to prevent the overall deformation of the valve seat. At the same time, the inner liner is placed on the inner liner bottom support, and the inner liner hot melt control cylinder controls the inner liner heating seat to heat and melt the top interface of the inner liner. The compressed air is connected to the inner liner hot melt control cylinder through the pneumatic proportional valve, and the cylinder is connected to the heating head to heat and melt the plastic part locally. By adjusting the proportional valve outlet pressure, it is ensured to melt quickly in the early stage of heating, and the pressure gradually decreases in the later stage to prevent the overall deformation of the inner liner. After hot melting, the inner liner heating seat is removed, and then the valve seat hot melt control cylinder controls the valve seat clamping tooling to clamp the valve seat, and hoist the valve seat to above the top connection port of the inner liner, and then move the valve seat down so that the hot melt surface of the valve seat is aligned with the hot melt port of the inner liner for connection. The pressure of the whole process is controllable, which can greatly reduce the damage of plastic parts caused by uneven hot melting pressure and reduce economic losses.
[0009] Preferably, in order to lift the valve seat stably, the valve seat clamping tooling includes a clamping cylinder fixedly installed on the output end of the valve seat hot melt control cylinder, and clamping plates are oppositely installed on the two output ends of the clamping cylinder. Clamping cavities matching the outer contour of the valve seat are opened on the opposite surfaces of the two clamping plates. The two clamping plates are driven to move toward or away from each other through the two end heads of the clamping cylinder, and the outside of the valve seat is clamped through the clamping cavity, thereby completing the lifting of the valve seat and facilitating the subsequent hot melt connection work.
[0010] Preferably, in order to prevent the high-temperature inner liner heating seat from damaging the inner liner hot melt control cylinder, a connecting plate is fixedly installed on the output end of the inner liner hot melt control cylinder, and an isolation connecting frame is fixedly installed between the connecting plate and the top of the inner liner heating seat. The inner liner heating seat is isolated by the isolation connecting frame, so that hot air will not directly contact the inner liner hot melt control cylinder, thereby improving the safety of the equipment.
[0011] Preferably, in order to prevent the inner liner from rolling off, a sunken groove is provided on the top of the inner liner base, and the inner side wall of the sunken groove is adapted to the outer contour of the bottom of the outer side wall of the inner liner. The inner liner is limited by the adapted sunken groove to improve stability.
[0012] Preferably, in order to ensure that the inner liner does not shake during processing, the device also includes an inner liner clamping mechanism, the inner liner clamping mechanism includes a groove plate fixedly mounted on the outer wall of the bracket, a two-way screw is movably installed inside the groove plate, and two sliding blocks are screwed opposite to each other on the outer wall of the two-way screw, and clamps are fixedly installed on the outer walls of the two sliding blocks, and arc grooves matching the contour of the outer wall of the inner liner are opened on the opposite surfaces of the two clamps, one end of the two-way screw passes through the side wall of the groove plate and is installed with a driving motor, and the two-way screw is rotated by starting the driving motor, so that the two sliding blocks on the two-way screw drive the clamps to move towards each other, thereby clamping the side wall of the inner liner on the inner liner base through the arc groove, thereby stabilizing the inner liner and ensuring processing accuracy. After processing is completed, the driving motor is started again to reverse the two-way screw, so that the two clamps can move oppositely away from the inner liner, so as to remove the inner liner quickly and conveniently.
[0013] Preferably, in order to make the clamp and the outer wall of the inner liner clamped more tightly, anti-slip rubber strips that are compatible with the contour of the outer wall of the inner liner are fixedly installed on the inner walls of the two arc-shaped grooves. The anti-slip rubber strips increase the friction force with the contact surface of the inner liner, thereby ensuring that the clamping of the inner liner is more stable.
[0014] (III) Beneficial effects
[0015] In this device, compressed air is connected to the valve seat hot melt control cylinder through a pneumatic proportional valve. By adjusting the outlet pressure of the proportional valve, rapid melting is ensured in the early stage of heating, and the pressure is gradually reduced in the later stage to prevent the overall deformation of the valve seat. The cylinder is connected to the heating head to heat and melt the plastic part locally. By adjusting the outlet pressure of the proportional valve, rapid melting is ensured in the early stage of heating, and the pressure is gradually reduced in the later stage to prevent the overall deformation of the inner tank. The pressure of the whole process is controllable, which can greatly reduce the damage of plastic parts caused by uneven hot melt pressure and reduce economic losses.
[0016] The device starts a driving motor to rotate the bidirectional screw rod, so that the two sliding blocks on the bidirectional screw rod drive the clamps to move toward each other, thereby clamping the side wall of the inner liner on the inner liner bottom support through the arc groove, thereby stabilizing the inner liner and ensuring the processing accuracy. After the processing is completed, the driving motor is started again to reverse the bidirectional screw rod, so that the two clamps can move in opposite directions and leave the inner liner, so that the inner liner can be removed quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of a device for multi-stage hot melting of plastics;
[0018] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;
[0019] Figure 3 This is a sample diagram of a valve seat and inner liner that are heat-pressed together using the multi-stage hot-melt device for plastics.
[0020] In the figure:
[0021] 1. Bracket; 2. Valve seat; 3. Inner liner; 4. Hot-melt connection mechanism; 41. Valve seat hoisting cylinder; 42. Valve seat heating seat; 43. Valve seat hot-melt control cylinder; 44. Valve seat clamping tool; 441. Clamping cylinder; 442. Clamping plate; 443. Clamping cavity; 45. Inner liner hot-melt control cylinder; 46. Inner liner heating seat; 461. Connecting plate; 462. Isolation connecting frame; 47. Inner liner bottom support; 471. Sunken groove; 5. Inner liner clamping mechanism; 51. Slot plate; 52. Bidirectional screw rod; 53. Sliding block; 54. Clamp; 55. Arc groove; 56. Driving motor; 57. Anti-slip rubber strip. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] Example 1
[0024] This embodiment provides a device for multi-stage hot melting of plastics, such as Figure 1-3 As shown, the device includes a bracket 1 and a hot melt connection mechanism 4 installed on the bracket 1 for hot melt connection of the valve seat 2 and the inner tank 3:
[0025] The hot melt connecting mechanism 4 includes a valve seat lifting cylinder 41 installed on the bracket 1 and a valve seat heating seat 42 arranged on one side, a valve seat hot melt control cylinder 43 is arranged on one side of the valve seat heating seat 42, a valve seat clamping tooling 44 for clamping the valve seat 2 is installed on the output end of the valve seat hot melt control cylinder 43, an inner liner hot melt control cylinder 45 is arranged on one side of the valve seat hot melt control cylinder 43, an inner liner heating seat 46 is installed on the output end of the inner liner hot melt control cylinder 45, and an inner liner base support 47 is installed at the bottom of the bracket 1.
[0026] When in use, the valve seat 2 to be hot-melted is placed on the valve seat heating seat 42 through the valve seat hoisting cylinder 41, and the valve seat heating seat 42 heats and hot-melts the bottom of the valve seat 2, and then the valve seat hot-melt control cylinder 43 controls the valve seat clamping tooling 44 to clamp the valve seat 2, and the compressed air is connected to the valve seat hot-melt control cylinder 43 through the pneumatic proportional valve. By adjusting the air outlet pressure of the proportional valve, it is ensured that it melts quickly in the early stage of heating, and the pressure gradually decreases in the later stage to prevent the valve seat 2 from being deformed as a whole. At the same time, the inner liner 3 is placed on the inner liner bottom support 47, and the inner liner hot-melt control cylinder 45 controls the inner liner heating seat 46 to heat and hot-melt the top interface of the inner liner 3. The compressed air is connected to the pneumatic proportional valve through the pneumatic proportional valve. The proportional valve is connected to the inner tank hot melt control cylinder 45, and the cylinder is connected to the heating head to heat and melt the plastic part locally. By adjusting the outlet pressure of the proportional valve, rapid melting is ensured in the early stage of heating, and the pressure is gradually reduced in the later stage to prevent the overall deformation of the inner tank 3. After hot melting, the inner tank heating seat 46 is removed, and then the valve seat hot melt control cylinder 43 controls the valve seat clamping tooling 44 to clamp the valve seat 2, and hoist the valve seat 2 to the top of the connection port of the inner tank 3, and then move the valve seat 2 downward so that the hot melt surface of the valve seat 2 is aligned with the hot melt port of the inner tank 3 for connection. The pressure of the whole process is controllable, which can greatly reduce the damage of plastic parts caused by uneven hot melt pressure and reduce economic losses.
[0027] The valve seat clamping tool 44 includes a clamping cylinder 441 fixedly mounted on the output end of the valve seat hot melt control cylinder 43, and clamping plates 442 are oppositely mounted on the two output ends of the clamping cylinder 441. The opposite surfaces of the two clamping plates 442 are provided with clamping cavities 443 that match the outer contour of the valve seat 2. When in use, the two clamping plates 442 are driven to move toward or in the opposite direction by the two ends of the clamping cylinder 441, and the outside of the valve seat 2 is clamped by the clamping cavity 443, thereby completing the hoisting work of the valve seat 2 and facilitating the subsequent hot melt connection work.
[0028] Furthermore, a connecting plate 461 is fixedly installed on the output end of the inner liner hot melt control cylinder 45, and an isolation connecting frame 462 is fixedly installed between the connecting plate 461 and the top of the inner liner heating seat 46. When in use, the inner liner heating seat 46 is isolated by the isolation connecting frame 462, so that the hot air will not directly contact the inner liner hot melt control cylinder 45, thereby improving the safety of the equipment.
[0029] Furthermore, a sunken groove 471 is provided on the top of the liner bottom bracket 47, and the inner side wall of the sunken groove 471 is adapted to the outer contour of the bottom of the outer side wall of the liner 3. When in use, the inner liner 3 is limited by the adapted sunken groove 471 to improve stability.
[0030] Example 2
[0031] Different from Example 1, Figure 1As shown, the device also includes an inner liner clamping mechanism 5, which includes a slot plate 51 fixedly mounted on the outer wall of the bracket 1, a bidirectional screw rod 52 movably mounted inside the slot plate 51, two sliding blocks 53 are oppositely screwed on the outer wall of the bidirectional screw rod 52, and clamps 54 are fixedly mounted on the outer walls of the two sliding blocks 53. The opposite surfaces of the two clamps 54 are provided with arc grooves 55 that are compatible with the contour of the outer wall of the inner liner 3, and one end of the bidirectional screw rod 52 passes through the side wall of the slot plate 51 and is installed with a driving motor 56.
[0032] When in use, by starting the driving motor 56, the bidirectional screw rod 52 is rotated, so that the two sliding blocks 53 on the bidirectional screw rod 52 drive the clamps 54 to move toward each other, so that the side wall of the inner liner 3 on the inner liner base 47 is clamped through the arc groove 55, so as to stabilize the inner liner 3 and ensure the processing accuracy. After the processing is completed, the driving motor 56 is started again to reverse the bidirectional screw rod 52, so that the two clamps 54 can be displaced in opposite directions to leave the inner liner 3, so that the inner liner 3 can be removed quickly and conveniently.
[0033] Furthermore, anti-skid rubber strips 57 matching the outer wall profile of the liner 3 are fixedly mounted on the inner side walls of the two arc-shaped grooves 55. When in use, the anti-skid rubber strips 57 increase the friction force of the contact surface with the liner 3, thereby ensuring that the liner 3 is clamped more stably.
[0034] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
Claims
1. A device for multi-stage hot melting of plastics, comprising a bracket (1) and a hot melting connection mechanism (4) mounted on the bracket (1) for hot melting connection of a valve seat (2) and an inner liner (3), characterized in that: The hot melt connection mechanism (4) comprises a valve seat hoisting cylinder (41) mounted on the bracket (1) and a valve seat heating seat (42) arranged on one side; a valve seat hot melt control cylinder (43) is arranged on one side of the valve seat heating seat (42); a valve seat clamping tool (44) for clamping the valve seat (2) is installed on the output end of the valve seat hot melt control cylinder (43); an inner liner hot melt control cylinder (45) is arranged on one side of the valve seat hot melt control cylinder (43); an inner liner heating seat (46) is installed on the output end of the inner liner hot melt control cylinder (45); and an inner liner base support (47) is installed at the bottom of the bracket (1).
2. The device for multi-stage hot melting of plastics according to claim 1, characterized in that: The valve seat clamping tool (44) comprises a clamping cylinder (441) fixedly mounted on the output end of the valve seat hot melt control cylinder (43), clamping plates (442) being mounted opposite to each other on the two output ends of the clamping cylinder (441), and clamping cavities (443) matching the outer contour of the valve seat (2) are formed on the opposite surfaces of the two clamping plates (442).
3. The device for multi-stage hot melting of plastics according to claim 1, characterized in that: A connecting plate (461) is fixedly mounted on the output end of the inner liner hot melt control cylinder (45), and an isolating connecting frame (462) is fixedly mounted between the connecting plate (461) and the top end of the inner liner heating seat (46).
4. The device for multi-stage hot melting of plastics according to claim 3, characterized in that: A sunken groove (471) is provided on the top of the inner liner base (47), and the inner side wall of the sunken groove (471) is adapted to the outer contour of the bottom of the outer side wall of the inner liner (3).
5. The device for multi-stage hot melting of plastics according to claim 1, characterized in that: The device also includes an inner liner clamping mechanism (5), the inner liner clamping mechanism (5) including a slot plate (51) fixedly mounted on the outer wall of the bracket (1), a bidirectional screw rod (52) movably mounted inside the slot plate (51), two sliding blocks (53) oppositely screwed on the outer wall of the bidirectional screw rod (52), a clamp (54) fixedly mounted on the outer wall of the two sliding blocks (53), an arc groove (55) matching the outer wall profile of the inner liner (3) is formed on the opposite surfaces of the two clamps (54), one end of the bidirectional screw rod (52) passes through the side wall of the slot plate (51) and is mounted with a driving motor (56).
6. The device for multi-stage hot melting of plastics according to claim 5, characterized in that: Anti-skid rubber strips (57) matching the outer wall profile of the inner container (3) are fixedly mounted on the inner side walls of the two arc-shaped grooves (55).