Injection molding machine and its vacuum heat insulation and heating module
By introducing a vacuum-insulated, glue-injected heating module into the heating module, and utilizing the recessed cavity design of the insulation sleeve and the fixing sleeve, heat loss is reduced, solving the problem of high power consumption of the heating coil and achieving energy saving and consumption reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU JIPINHAO TECH EQUIP CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-02
AI Technical Summary
The heat from existing heating modules is easily dissipated through the sleeve, resulting in high power consumption of the heating coil.
The vacuum-insulated heat-insulating heating module includes a heating coil, a fixing sleeve, and a heat insulation sleeve. There is a clearance channel between the heat insulation sleeve and the fixing sleeve, which are in line contact or point contact to reduce the contact area and reduce the heat conduction efficiency.
It effectively reduces heat loss, lowers the power consumption of heating coils, saves energy, reduces factory temperature, and reduces the energy consumption of fans and air conditioners.
Smart Images
Figure CN224311136U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding technology, and in particular to an injection molding machine and its vacuum heat insulation and heating module. Background Technology
[0002] Injection molding is one of the main processing methods for plastic products. Molten plastic raw materials are injected into an injection mold through a hot runner system, where they cool and solidify to form a product that matches the mold cavity. To maintain the molten state of the plastic raw material before entering the injection mold and ensure its fluidity, a heating module is usually installed outside the hot runner system to maintain a high temperature.
[0003] The existing heating module includes a heating coil and a clamp. The heating coil is fitted outside the barrel, and the clamp is used to tighten and fix the heating coil. When the heating coil is working continuously, heat is easily dissipated through the clamp, resulting in high power consumption of the heating coil. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an injection molding machine and its vacuum heat insulation and heating module, which has the advantages of reducing heat loss and reducing power consumption.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] According to a first aspect of the present disclosure, a vacuum heat-insulating injection molding machine heating module is provided, comprising:
[0007] Heating coils are used to connect to an external power source for heating.
[0008] A fixing sleeve is used to tighten and fix the heating coil; and,
[0009] A heat insulation sleeve is disposed between the heating coil and the fixing sleeve and is sealed to the fixing sleeve. The heat insulation sleeve has a clearance cavity, and the clearance cavity is in line contact and / or point contact with the heating coil and / or the fixing sleeve. The fixing sleeve and the heat insulation sleeve are provided with corresponding wiring ports for inserting power cords.
[0010] To achieve the above technical solution, the heat insulation sleeve is located inside the fixed clamp. During installation, the fixed clamp is locked by a locking device. The heat insulation sleeve will follow the movement of the fixed clamp to clamp the heating ring to the outside of the barrel. When the heating ring is working, it can directly heat the barrel to keep the plastic raw material in a molten state. Because a clearance cavity is set, and the clearance cavity is in line contact or point contact with the heating ring or fixed clamp, the contact area between the heat insulation sleeve and the heating ring and fixed clamp is greatly reduced, thereby greatly reducing the heat conduction efficiency, effectively reducing heat loss, and allowing heat to be transferred to the barrel as much as possible, thereby reducing the power consumption of the heating ring.
[0011] In some exemplary embodiments, the avoidance cavity has a continuous reciprocating shape.
[0012] To achieve the above technical solution, it is easier to process the material using a reciprocating spiral method, and it can form a continuous and stable support.
[0013] In some exemplary embodiments, the clearance cavity is provided with a plurality of spaced support protrusions, which are used to make contact with the heating coil and / or the fixing sleeve.
[0014] By achieving the above technical solution, the contact area between the heat insulation sleeve and the heating coil or fixing sleeve can be further reduced by forming point contact through the supporting protrusions, thereby further reducing the heat conduction efficiency.
[0015] In some exemplary embodiments, a vacuum cavity is formed between the fixing sleeve and the heat insulation sleeve.
[0016] The above technical solution further reduces air heat conduction between the fixing sleeve and the heat insulation sleeve, and further reduces heat conduction efficiency.
[0017] In some exemplary embodiments, the fixing sleeve is a semi-closed ring, and both free ends of the fixing sleeve are provided with locking posts, which are used to lock the locking member to tighten the fixing sleeve.
[0018] In some exemplary embodiments, the locking post is fixed to the fixing sleeve by a connecting sleeve plate, and the connecting sleeve plate is provided with a connecting slot for inserting a locking member.
[0019] The above technical solution facilitates the tightening and fixing of the fixing sleeve.
[0020] In some exemplary embodiments, the edge of the fixing sleeve is provided with an inwardly bent connecting flange.
[0021] The above technical solution facilitates a sealed connection with the heat insulation sleeve.
[0022] According to a second aspect of the present disclosure, an injection molding machine is provided, including a plurality of vacuum heat-insulating injection and heating modules as described in the first aspect, wherein the vacuum heat-insulating injection and heating modules are fitted onto the outside of the injection barrel.
[0023] By implementing the above technical solution, heat dissipation from the heating coil can be effectively reduced, further reducing the power consumption of the heating coil.
[0024] In summary, compared with the prior art, this utility model has the following beneficial effects:
[0025] This utility model provides an injection molding machine and its vacuum heat-insulating injection heating module. The heating module includes: a heating coil for electrical connection to an external power source for heating; a fixing sleeve for clamping and fixing the heating coil; and a heat insulation sleeve disposed between the heating coil and the fixing sleeve and sealed to the fixing sleeve. The heat insulation sleeve has a clearance cavity, and the clearance cavity is in line contact and / or point contact with the heating coil and / or the fixing sleeve. The fixing sleeve and the heat insulation sleeve have corresponding wiring ports for inserting power cords. The heat insulation sleeve is located inside the fixing sleeve. During installation, the fixing sleeve is locked by the locking device. The heat insulation sleeve will follow the movement of the fixing sleeve to clamp the heating ring to the outside of the barrel. When the heating ring is working, it can directly heat the barrel to keep the plastic raw material in a molten state. Because of the setting of the avoidance cavity, and the avoidance cavity is in line contact or point contact with the heating ring or fixing sleeve, the contact area between the heat insulation sleeve and the heating ring and fixing sleeve is greatly reduced. This greatly reduces the heat conduction efficiency, effectively reduces heat loss, and allows heat to be transferred to the barrel as much as possible, thereby reducing the power consumption of the heating ring. Attached Figure Description
[0026] Figure 1 This is a top view of the vacuum heat insulation and heat preservation heating module for injection molding machines in this embodiment of the present invention.
[0027] Figure 2 This is a schematic diagram of the structure of the vacuum heat insulation and heat preservation heating module for injection molding machines in this embodiment of the present invention.
[0028] Figure 3 This is a schematic diagram of the structure of the vacuum heat insulation and heat preservation heating module for injection molding machines in an embodiment of this utility model, showing the removal of the heating coil.
[0029] Figure 4 This is a schematic diagram of the planar unfolded structure of the heat insulation sleeve in an embodiment of this utility model.
[0030] Figure 5 This is a schematic diagram of the structure of the fixing sleeve in an embodiment of this utility model.
[0031] Figure 6 This is a structural diagram of the vacuum heat insulation and heat preservation heating module of the injection molding machine in an embodiment of this utility model.
[0032] The numbers and letters in the diagram represent the names of the corresponding components:
[0033] 10. Heating coil; 20. Fixing clamp; 21. Locking post; 22. Connecting sleeve; 23. Connecting slot; 24. Connecting flange; 25. Locking plate; 26. Terminal block; 27. Vacuum hole; 28. Vacuum connector; 30. Heat insulation sleeve; 31. Alternating cavity; 32. Wiring port; 33. Support protrusion; 40. Cannon barrel; 41. Temperature sensing terminal block; 42. Heating relay switch; 43. Vacuum valve; 44. Vacuum gauge. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] like Figures 1 to 5 As shown, the first aspect of this utility model provides a vacuum heat-insulating injection molding machine heating module, including: a heating coil 10 for electrical connection to an external power source for heating; a fixing sleeve 20 for clamping and fixing the heating coil 10; and a heat insulation sleeve 30 disposed between the heating coil 10 and the fixing sleeve 20 and sealed to the fixing sleeve 20, the heat insulation sleeve 30 having a clearance cavity 31, and the clearance cavity 31 having line contact and / or point contact with the heating coil 10 and / or the fixing sleeve 20; the fixing sleeve 20 and the heat insulation sleeve 30 having corresponding wiring ports 32 for inserting power cords.
[0036] Specifically, the heating coil 10 is an existing structure with a certain degree of flexibility, which can be freely bent to wrap the barrel. The heating coil 10 is connected to a power cord, which passes through the terminal 32 to connect to an external power source, thereby controlling the operation of the heating coil 10.
[0037] The fixing sleeve 20 is usually made of stainless steel or other metal materials and has a certain deformation capacity, so that it can deform after the locking member is locked in to tighten the heating coil 10. The fixing sleeve 20 is a semi-closed ring, and both free ends of the fixing sleeve 20 are provided with locking posts 21. The locking posts 21 are used to lock the locking member to tighten the fixing sleeve 20. The locking posts 21 are fixed to the fixing sleeve 20 through the connecting sleeve plate 22, and the connecting sleeve plate 22 is provided with a connecting slot 23 for the locking member to pass through. Usually, a connecting hole is provided on the locking post 21 at the position corresponding to the connecting slot 23. The locking member can be a screw or bolt assembly. The locking member passes through the connecting hole to facilitate the tightening and fixing of the fixing sleeve 20.
[0038] Furthermore, the edge of the fixing sleeve 20 is provided with an inwardly bent connecting flange 24. The connecting flange 24 can be formed by stamping to facilitate a sealed connection with the heat insulation sleeve 30. Typically, the heat insulation sleeve 30 and the connecting flange 24 are welded and fixed to form a seal, and the shape of the heat insulation sleeve 30 is adapted to the shape of the fixing sleeve 20.
[0039] To facilitate power supply to the heating coil 10, a locking plate 25 is usually provided at the wiring port 32. A terminal block 26 is fixed to the locking plate 25 by screws. The terminal block 26 has wiring terminals. One side of the wiring terminal is electrically connected to the heating coil 10, and the other side of the wiring terminal is connected to an external power source through a power cord, thus facilitating the wiring and power supply of the heating coil 10.
[0040] The heat insulation sleeve 30 is usually formed by stamping. The clearance cavity 31 has a continuous reciprocating shape. The reciprocating shape is easier to process and can form a continuous and stable support. The clearance cavity 31 can be set as one, two or more. The cross-section of the clearance cavity 31 is semi-circular. When there is one clearance cavity 31, it forms a line contact with the fixing sleeve 20 or the heating ring 10 through the middle position. When there are two or more clearance cavities 31, one or a part of the clearance cavity 31 can be in line contact with the fixing sleeve 20, while the other clearance cavities 31 are in line contact with the heating ring 10.
[0041] Preferably, the recessed cavity 31 is provided with a plurality of spaced support protrusions 33. The support protrusions 33 are used to support and contact the heating coil 10 and / or the fixing sleeve 20. By forming point contact through the support protrusions 33, the contact area between the heat insulation sleeve 30 and the heating coil 10 or the fixing sleeve 20 can be further reduced, thereby further reducing the heat conduction efficiency. Similarly, when one recessed cavity 31 is provided, it forms point contact with the fixing sleeve 20 or the heating coil 10 through the support protrusions 33. When two or more recessed cavities 31 are provided, the support protrusions 33 on one or a part of the recessed cavity 31 can be in point contact with the fixing sleeve 20, while the support protrusions 33 of the other recessed cavities 31 are in point contact with the heating coil 10.
[0042] Furthermore, a vacuum cavity is formed between the fixing sleeve 20 and the heat insulation sleeve 30. This is achieved by evacuating the air between the fixing sleeve 20 and the heat insulation sleeve 30 to create a vacuum, thereby further reducing air heat conduction between them and lowering the heat conduction efficiency. Typically, to facilitate vacuuming, a vacuum hole 27 is provided on the fixing sleeve 20 at a position corresponding to the clearance cavity 31. A vacuum connector 28 is connected to the vacuum hole 27 for connecting external vacuuming equipment to perform vacuuming.
[0043] The heat insulation sleeve 30 is located inside the fixed clamp 20. During installation, the fixed clamp 20 is locked by the locking device. The heat insulation sleeve 30 will follow the movement of the fixed clamp 20 to clamp the heating ring 10 to the outside of the barrel. When the heating ring 10 is working, it can directly heat the barrel to keep the plastic raw material in a molten state. Due to the setting of the avoidance cavity 31, and the avoidance cavity 31 is in line contact or point contact with the heating ring 10 or the fixed clamp 20, the contact area between the heat insulation sleeve 30 and the heating ring 10 and the fixed clamp 20 is greatly reduced, thereby greatly reducing the heat conduction efficiency, effectively reducing heat loss, and allowing heat to be transferred to the barrel as much as possible, thereby reducing the power consumption of the heating ring 10. The purpose of the line contact or point contact is to form a certain support force to prevent the fixed clamp 20 or the heat insulation sleeve 30 from deforming due to the large external air pressure received after vacuuming, so that the two can fit together to form a large heat conduction area.
[0044] Meanwhile, since the heating coil 10 is a consumable and easily damaged item, it usually needs to be replaced frequently. When replacing the heating module in the existing technology, the fixing sleeve 20 is usually replaced at the same time. The replaced fixing sleeve 20 has no other use and can only be melted down. Producing one ton of stainless steel requires 10-15 kWh of electricity. In addition, the energy consumption for transportation and processing results in a lot of energy waste. In this embodiment, the fixing sleeve 20 and the heat insulation sleeve 30 are durable items with an integrated structure. When replacing them, the heating coil 10 can be replaced directly, without the need for melting down, which reduces energy consumption and achieves the effect of energy saving and environmental protection.
[0045] By reducing heat loss, the temperature rise inside the factory can be reduced. This is especially beneficial for large enterprises that use a large number of injection molding machines, as it can significantly reduce the temperature rise inside the factory and thus reduce the energy consumption of cooling equipment such as fans and air conditioners.
[0046] The second aspect of this utility model provides an injection molding machine, including a plurality of vacuum heat-insulating injection and heating modules as described in the first aspect. The vacuum heat-insulating injection and heating modules are fitted onto the outside of the barrel 40. The number of vacuum heat-insulating injection and heating modules can be selected according to the length of the barrel 40. Through the heat insulation and heat conduction reduction effects of the vacuum heat-insulating injection and heating modules, the heat dissipation of the heating coil 10 can be effectively reduced, and the power consumption of the heating coil 10 can be further reduced.
[0047] like Figure 6As shown, typically, each barrel 40 is equipped with 6-8 sets of vacuum-insulated injection molding heating modules, and multiple temperature sensing points are set on the barrel 40. Temperature sensors are installed at these sensing points to collect temperature data. The temperature sensors are connected to temperature sensing terminals for electrical connection to the injection molding machine's control unit, enabling automatic control of the heating modules. Each heating module is connected to a heating relay switch 42, which controls whether to supply power to the heating coil 10. The vacuum connectors 28 of each heating module are connected in parallel to a vacuum valve 43. The vacuum valve 43 can be easily connected to external vacuum equipment such as a vacuum machine for vacuuming operations. A vacuum gauge is also connected to the vacuum valve 43 to monitor the vacuum level of the vacuum chamber in real time. If the vacuum level is insufficient, vacuuming can be performed again through the vacuum valve 43. After vacuuming is completed, the vacuum valve 43 can be closed. If a heating module has a perforation and leaks, the leak can be repaired by argon arc welding or laser welding without replacement, thus reducing costs.
[0048] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.
Claims
1. A vacuum heat-insulating injection molding machine heating module, characterized in that, include: Heating coils are used to connect to an external power source for heating. A fixing sleeve is used to tighten and fix the heating coil; as well as, A heat insulation sleeve is disposed between the heating coil and the fixing sleeve and is sealed to the fixing sleeve. The heat insulation sleeve has a clearance cavity, and the clearance cavity is in line contact and / or point contact with the heating coil and / or the fixing sleeve. The fixing sleeve and the heat insulation sleeve are provided with corresponding wiring ports for inserting power cords.
2. The vacuum heat-insulating injection molding machine heating module according to claim 1, characterized in that, The avoidance cavity has a continuous reciprocating shape.
3. The vacuum heat-insulating injection molding heating module for injection molding machines according to claim 1 or 2, characterized in that, The clearance cavity is provided with a number of spaced support protrusions, which are used to make contact with the heating coil and / or the fixing sleeve.
4. The vacuum heat insulation and heat preservation heating module for injection molding machines according to claim 3, characterized in that, A vacuum cavity is formed between the fixing sleeve and the heat insulation sleeve.
5. The vacuum heat-insulating injection molding machine heating module according to claim 1, characterized in that, The fixing sleeve is semi-closed ring, and both free ends of the fixing sleeve are provided with locking posts. The locking posts are used to lock the locking components to tighten the fixing sleeve.
6. The vacuum heat insulation and heat preservation heating module for injection molding machines according to claim 5, characterized in that, The locking pin is fixed to the fixing sleeve by a connecting sleeve plate, and the connecting sleeve plate is provided with a connecting slot for inserting the locking element.
7. The vacuum heat insulation and heat preservation heating module for injection molding machines according to claim 1, characterized in that, The edge of the fixing sleeve is provided with an inwardly bent connecting flange.
8. An injection molding machine, characterized in that, It includes several vacuum heat insulation and heat preservation heating modules as described in any one of claims 1-7, wherein the vacuum heat insulation and heat preservation heating modules are fitted onto the outside of the barrel.