Electric heater plastic-coated part for new energy automobile
By using a multi-injection molding process with H65 brass and PBT plastic in electric heaters for new energy vehicles, the problem of poor flowability in the plastic coating process was solved, resulting in plastic-coated parts with high stability and good uniformity, meeting the requirements for lightweighting.
Patent Information
- Application Number
- CN202423235018.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-26
AI Technical Summary
The existing plastic coating process for electric heaters used in new energy vehicles has poor fluidity, which easily generates bubbles and residual gas, affecting processing stability and uniformity.
A structure including a conductive component, a primary injection molded part, and a secondary injection molded part was designed. The conductive component has through holes, the primary injection molded part has strip-shaped injection grooves, and the secondary injection molded part has reinforcing bosses. H65 brass and PBT plastic materials are used to form a stable connection through multiple injection molding processes.
It improves the fluidity and stability of the coating process, avoids bubbles and residual gas, ensures uniform processing and reinforcement of the electrode parts, and achieves lightweight design.
Smart Images
Figure CN223772165U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an electric heater for new energy vehicles, specifically a plastic-coated part for an electric heater for new energy vehicles. Background Technology
[0002] With the development of new energy vehicles, PTC electric heaters have gradually achieved multi-level control, allowing for different heating power outputs through adjustment of the level. To save energy and reduce costs, weight reduction is often a key focus in the design of electric heaters. In achieving various heating conditions in HVAC systems, the compact and lightweight design of electric heaters can be achieved using plastic-coated components.
[0003] The coating process is divided into cold and hot states. It's crucial to avoid moisture generation during both cold and hot states, as moisture trapped within the molded part can lead to poor high-voltage insulation. However, current coating processes have relatively poor fluidity, making them prone to generating bubbles and residual gases during injection molding, which negatively impacts the stability and uniformity of the process. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a plastic-coated part for electric heaters for new energy vehicles that has good fluidity, high stability and uniform material during plastic coating.
[0005] To solve the above-mentioned technical problems, the present invention provides a plastic-coated part for an electric heater for new energy vehicles, comprising a conductive component, a primary injection molded part wrapped around the conductive component, and a secondary injection molded part wrapped around the primary injection molded part; the conductive component has a through hole, and the primary injection molded part has a strip-shaped injection groove extending back and forth at the through hole position.
[0006] The primary injection molded part is formed on the conductive component by injection molding process, and is provided with a secondary injection positioning boss and an electrode boss; the primary injection molded part is also provided with mounting holes and positioning holes.
[0007] The secondary injection molded part is formed on the primary injection molded part by injection molding process, and its overall thickness is the same as the thickness of the secondary injection molded positioning boss; a reinforcing boss is provided on the secondary injection molded part outside the electrode part boss.
[0008] The conductive component includes an electrode portion and a conductive portion, and the conductive portion has the through hole.
[0009] The conductive component is made of H65 brass.
[0010] The material of the primary injection molded part and the secondary injection molded part is PBT.
[0011] The advantages of this utility model are: a strip-shaped injection groove is opened before and after the through hole of the conductive component on the primary injection part, which increases the fluidity of the secondary injection, avoids the generation of air bubbles and residual gas during the secondary injection process, and ensures the stability and uniformity of the processing; the electrode part is additionally covered with a reinforcing boss, making it less prone to bending. Attached Figure Description
[0012] Figure 1 This is a perspective view of the conductive component of this utility model;
[0013] Figure 2 This is a perspective view of the front of the present invention after one injection molding.
[0014] Figure 3 This is a perspective view of the reverse side after one injection molding of this utility model;
[0015] Figure 4 This is a perspective view of the front of the present invention after secondary injection molding;
[0016] Figure 5 This is a perspective view of the reverse side after secondary injection molding of this utility model. Detailed Implementation
[0017] The following detailed description of the plastic-coated part of the electric heater for new energy vehicles of this utility model, in conjunction with the accompanying drawings and specific embodiments, will be provided in further detail.
[0018] like Figure 1 , 2 As shown in Figure 4, the plastic-coated part of the electric heater for new energy vehicles of this utility model includes a conductive component 1, a primary injection molded part 2 wrapped around the conductive component 1, and a secondary injection molded part 3 wrapped around the primary injection molded part 2. The conductive component is made of H65 brass with good ductility and conductivity, and the primary injection molded part 2 and the secondary injection molded part 3 are made of PBT plastic with good temperature resistance and flame retardancy.
[0019] like Figure 1 , 2 As shown, the conductive component 1 includes an electrode part 4 and a conductive part 5. The conductive part 5 has a through hole 7. The primary injection molded part 2 has a strip-shaped injection groove 10 extending back and forth at the position of the through hole 7, which is used to improve the flowability of secondary injection molding.
[0020] like Figure 2 , 3 As shown, the primary injection molded part 2 has a size of 94*55*5mm and is formed on the conductive part 1 through injection molding. It is provided with a secondary injection molding positioning boss 8 for secondary injection molding positioning and an electrode part boss 9 for protecting the electrode part 4. The primary injection molded part 2 also has mounting holes 11 and positioning holes 12 in the middle of some of the secondary injection molding positioning bosses 8 to facilitate the positioning and installation of the plastic-coated part.
[0021] like Figure 4 , 5 As shown, the secondary injection molded part 3 has a size of 97*58*5mm and is formed on the primary injection molded part 2 through injection molding process. Its overall thickness is consistent with the thickness of the secondary injection molded positioning boss 8. A reinforcing boss 13 for further reinforcing the electrode part 4 is provided on the outer side of the electrode part boss 9 on the secondary injection molded part 3.
[0022] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A plastic-coated part for an electric heater used in new energy vehicles, characterized in that: It comprises a conducting component (1), a primary injection molding part (2) wrapped outside the conducting component (1), and a secondary injection molding part (3) wrapped outside the primary injection molding part (2); the conducting component (1) is provided with a through hole (7), and the primary injection molding part (2) is provided with a strip-shaped injection molding groove (10) extending frontward and rearward at the position of the through hole (7).
2. The plastic-coated electric heater component for a new energy vehicle according to claim 1, characterized in that: The primary injection molding part (2) is formed on the conducting component (1) through an injection molding process, and is provided with a secondary injection molding positioning boss (8) and an electrode part boss (9); the primary injection molding part (2) is further provided with a mounting hole (11) and a positioning hole (12).
3. The plastic part of the electric heater for new energy vehicles according to claim 2, characterized in that: The secondary injection molding part (3) is formed on the primary injection molding part (2) through an injection molding process, and has a whole thickness consistent with the thickness of the secondary injection molding positioning boss (8); the secondary injection molding part (3) is provided with a reinforcing boss (13) outside the electrode part boss (9).
4. The plastic part of the electric heater for new energy vehicles according to claim 1, 2 or 3, characterized in that: The conducting component (1) comprises an electrode part (4) and a conducting part (5), and the conducting part (5) is provided with the through hole (7).
5. The electric heater plastic part for new energy vehicles according to claim 4, characterized in that: The material of the conducting component (1) is H65 brass.
6. The electric heater plastic part for new energy vehicles according to claim 5, characterized in that: The materials of the primary injection molding part (2) and the secondary injection molding part (3) are PBT.