Injection molding positioning mechanism of copper bar and terminal
By using a copper busbar positioning mechanism with inserts and springs during terminal injection molding, the problem of copper busbar offset during injection molding is solved, achieving accurate positioning of the copper busbar and improving the quality of the finished product. The structure is simple and low in cost.
Patent Information
- Application Number
- CN202520474587.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-18
AI Technical Summary
The existing terminals lack positioning and pre-compression on the mold side during injection molding, which causes the copper busbar to shift and affects the quality of the finished product.
An injection molding positioning mechanism for a copper busbar is adopted, including inserts and spring structures. The inserts have slots and linear reciprocating degrees of freedom. The chamfered corners of the slots guide the copper busbar. The springs provide preload to reduce copper busbar offset and achieve limiting through the combination of multiple inserts and slots.
It effectively reduces the offset of the copper busbar during the injection molding process, ensures accurate positioning of the copper busbar, improves the quality of the finished product, and reduces costs through a simple and reliable structure.
Smart Images
Figure CN223743962U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of terminals, specifically to an injection molding positioning mechanism and terminal for a copper busbar. Background Technology
[0002] Terminals are accessories used to achieve electrical connections and are a component of connectors. Terminals often contain copper busbars for conducting electricity, which are at least partially encased in plastic components, which are themselves insulating.
[0003] There is a terminal product in an embedded injection molding form. The copper busbar has protruding leads on the male mold side for positioning and support, but the female mold side is completely encased in plastic, and external exposure is not allowed. Because the terminal is not exposed on the female mold side, it lacks positioning and pre-compression during the processing stage. The conventional solution is to use only the male mold for positioning, without positioning and pre-compression on the female mold. However, this is prone to misalignment during injection molding, resulting in a poor final product quality. In addition, due to budget and structural limitations, a pin-pulling structure cannot be used. Therefore, positioning during the terminal processing stage is indeed a highly specialized technical challenge. Utility Model Content
[0004] The problem to be solved by this utility model is to provide an injection positioning mechanism and terminal for copper busbars, in which the insert can pre-press the copper busbar during injection molding to reduce the offset of the copper busbar.
[0005] To solve the above problems, this utility model provides an injection molding positioning mechanism and terminal for copper busbars. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows:
[0006] An injection molding positioning mechanism for a copper busbar includes: an insert with a groove at one end that contacts the copper busbar, the insert having a linear reciprocating degree of freedom to move along its own length; a spring, the end of the insert away from the copper busbar that contacts the spring; wherein the width of the bottom of the groove is not less than the thickness of the copper busbar, and the opening of the groove has a chamfer to increase the opening width; a plurality of pins are integrally protruding on one side of the copper busbar, and the insert and the pins are respectively located on both sides of the copper busbar.
[0007] The beneficial effects of adopting the above technical solution are as follows: The structure of this technical solution can position and pre-compress the copper busbar. The spring-loaded insert is equivalent to adding a floating structure. During injection molding, the insert can pre-compress the copper busbar, reducing its offset. The chamfer of the slot acts as a guide when the insert is inserted. The slot limits the straight line of the copper busbar, reducing possible offset of the copper busbar during injection molding around it, and can correct the position of the copper busbar during mold closing.
[0008] This mechanism can be used in injection molds. During filling, the floating insert experiences less force in the Z direction, but the slot is positioned by the mold core, effectively limiting the copper busbar. After mold opening, the spring causes the insert to pop out, so that the movable insert can pre-press and position the copper busbar during the next mold closing.
[0009] When the injection mold is under pressure, the pressure is very high, the spring is compressed, and the insert is pushed back to the designated position.
[0010] The entire mechanism is simple, reliable, and inexpensive. It helps to produce copper busbar terminals that meet the functional and safety requirements of the product.
[0011] As a further improvement of this utility model, each slot has two right-angled inside corners at the bottom.
[0012] The beneficial effect of adopting the above technical solution is that, from a microscopic perspective, the card slot is equivalent to the three sides of the copper busbar making contact and limiting.
[0013] As a further improvement of this utility model, the depth of the card slot is less than the opening width of the card slot.
[0014] The beneficial effect of adopting the above technical solution is that the depth of the slot does not need to be too deep, otherwise the separation from the copper busbar may not be smooth. It is sufficient to limit the left and right displacement of the copper busbar.
[0015] As a further improvement of this utility model, the copper busbar encloses the injection molded body, and the copper busbar and the injection molded body form a terminal. The adjacent surface of the outer wall of the injection molded body and the edge of the copper busbar without pins is the female mold side of the terminal, and the adjacent surface of the outer wall of the injection molded body and the edge of the copper busbar where the pins are located is the male mold side of the terminal. The vertical distance from the female mold side to the copper busbar plus the depth of the slot is equal to the linear movement length of the insert.
[0016] The beneficial effect of adopting the above technical solution is that it indicates the limit position of the last retraction of the insert, and the limit position of the last retraction of the insert will not form a dent on the injection molded surface of the terminal.
[0017] As a further improvement of this utility model, the copper busbar has several inserts in contact with each other, and the inserts in contact with the same copper busbar are arranged at intervals.
[0018] The beneficial effect of adopting the above technical solution is that multiple inserts can limit the movement of the copper busbar at various points.
[0019] As a further improvement of this utility model, the end of the insert that contacts the spring has an integral enlarged portion.
[0020] The beneficial effect of adopting the above technical solution is that the enlarged part has sufficient area to contact the spring.
[0021] A terminal comprising an injection-molded positioning mechanism for a copper busbar as mentioned above.
[0022] As a further improvement of this utility model, the terminal includes a copper busbar, which is wrapped with an injection molded body, and the pins protrude from the injection molded body.
[0023] The beneficial effect of adopting the above technical solution is that the terminal is closely related to the positioning mechanism of this application.
[0024] As a further improvement of this utility model, when the insert is not in contact with the copper busbar, the outer wall of the injection molded body has an integral boss that matches the groove.
[0025] The beneficial effects of adopting the above technical solution are: the boss is naturally formed by the slot. When the pressure is maintained, the insert is pushed back by the force, forming a boss on the surface of the product workpiece. The boss can ensure that the copper busbar is not exposed and ensure insulation protection at this point.
[0026] As a further improvement of this utility model, the outer wall of the injection molded body also has several protruding ridges, the protrusion height of which is equal to the protrusion height of the boss.
[0027] The beneficial effects of adopting the above technical solution are: both the protrusions and the protrusions can play a role in preventing scratches and impacts on the injection molded surface of the terminal, and the protrusion is equivalent to having an unexpected additional advantage. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a perspective view of one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application;
[0030] Figure 2 This is a partial enlarged view at point A of one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application;
[0031] Figure 3 This is a perspective view of one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application;
[0032] Figure 4 This is a partial enlarged view at point B of one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application;
[0033] Figure 5 This is a schematic diagram of the pressure holding state of one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application;
[0034] Figure 6 This is a schematic diagram showing the filling state of one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application;
[0035] Figure 7 This is a schematic diagram of an insert and a copper busbar, representing one embodiment of the injection molding positioning mechanism and terminal of the copper busbar of this application.
[0036] 1-Female mold side; 2-Male mold side; 3-Copper busbar; 31-Pin; 4-Injection body; 41-Boss; 42-Extrusion cavity; 43-Protruding ridge; 5-Insert; 51-Slot; 52-Chamfer; 53-Enlarged part; 6-Spring. Detailed Implementation
[0037] The present invention will be further described in detail below with reference to specific embodiments:
[0038] To achieve the purpose of this utility model, an injection molding positioning mechanism for a copper busbar includes: an insert 5, one end of which has a groove 51 that contacts the copper busbar 3; the insert 5 has a linear reciprocating degree of freedom to move along its own length; and a spring 6, the end of the insert 5 facing away from the copper busbar contacting the spring 6; wherein the width of the bottom of the groove 51 is not less than the thickness of the copper busbar 3. Figure 7 As shown, the opening of the slot 51 has a chamfer 52 to increase the opening width; a number of pins 31 are integrally protruding on one side of the copper busbar 3, and the insert 5 and the pins 31 are located on the left and right sides of the copper busbar 3 respectively.
[0039] Chamfer 52 can be either a rounded corner or a beveled corner. Spring 6 can be a compression spring.
[0040] The beneficial effects of adopting the above technical solution are as follows: The structure of this technical solution can position and pre-compress the copper busbar. The spring-loaded insert is equivalent to adding a floating structure. During injection molding, the insert can pre-compress the copper busbar, reducing its offset. The chamfer of the slot guides the insert during insertion. The slot limits the straight line of the copper busbar, reducing possible offset during injection molding around the copper busbar, and can correct the position of the copper busbar during mold closing. This mechanism can be used in injection molds. During filling, the floating insert experiences less force in the Z direction, but the slot, positioned by the mold core, effectively limits the copper busbar. After mold opening, the spring causes the insert to pop out, so that the movable insert can pre-compress and position the copper busbar during the next mold closing. During the holding pressure of the injection mold, the pressure is high, the spring is compressed, and the insert retracts to the designated position. The entire mechanism is simple, reliable, and inexpensive. It helps to produce copper busbar terminals that meet the functional and safety requirements of the product.
[0041] In some other embodiments of this utility model, each slot 51 has two right-angled inside corners at its bottom.
[0042] The beneficial effect of adopting the above technical solution is that, from a microscopic perspective, the card slot is equivalent to the three sides of the copper busbar making contact and limiting.
[0043] In some other embodiments of this utility model, the depth of the slot 51 is less than the opening width of the slot 51.
[0044] The beneficial effect of adopting the above technical solution is that the depth of the slot does not need to be too deep, otherwise the separation from the copper busbar may not be smooth. It is sufficient to limit the left and right displacement of the copper busbar.
[0045] In some other embodiments of this utility model, the copper busbar 3 encloses the injection molded body 4, and the copper busbar 3 and the injection molded body 4 form a terminal. The adjacent surface of the outer wall of the injection molded body 4 to the edge of the copper busbar 3 without the pins 31 is the female mold side 1 of the terminal, and the adjacent surface of the outer wall of the injection molded body 4 to the edge of the copper busbar 3 where the pins 31 are located is the male mold side 2 of the terminal. The vertical distance from the female mold side 1 to the copper busbar 3 plus the depth of the slot 51 is equal to the linear movement length of the insert 51.
[0046] The beneficial effect of adopting the above technical solution is that it indicates the limit position of the last retraction of the insert, and the limit position of the last retraction of the insert will not form a dent on the injection molded surface of the terminal.
[0047] In some other embodiments of this utility model, the copper busbar 3 contacts a plurality of inserts 5, and the inserts 5 in contact with the same copper busbar 3 are arranged at intervals.
[0048] The beneficial effect of adopting the above technical solution is that multiple inserts can limit the movement of the copper busbar at various points.
[0049] In some other embodiments of this utility model, the end of the insert 5 that contacts the spring 6 has an integral enlarged portion 53.
[0050] The beneficial effect of adopting the above technical solution is that the enlarged part has sufficient area to contact the spring.
[0051] A terminal comprising an injection-molded positioning mechanism for a copper busbar as mentioned above.
[0052] In some other embodiments of this utility model, the terminal includes a copper busbar 3, which encloses an injection molded body 4, and pins 31 protrude from the injection molded body 4.
[0053] The beneficial effect of adopting the above technical solution is that the terminal is closely related to the positioning mechanism of this application.
[0054] like Figure 2 As shown, in some other embodiments of this utility model, when the insert 5 is not in contact with the copper busbar 3, the outer wall of the injection molded body 4 has an integral boss 41, and the boss 41 matches the slot 51.
[0055] During the injection molding process of the injection body 4, the insert 5 is not removed from the injection body 4 in the early stage, so an extrusion cavity 42 is formed that is not occupied by molten plastic. In the later stage, the insert 5 is removed from the injection body 4, and part of the molten plastic occupies the extrusion cavity 42 and continues to fill it, even filling the slot 51, thus naturally forming the boss 41.
[0056] The beneficial effects of adopting the above technical solution are: the boss is naturally formed by the slot. When the pressure is maintained, the insert is pushed back by the force, forming a boss on the surface of the product workpiece. The boss can ensure that the copper busbar is not exposed and ensure insulation protection at this point.
[0057] In some other embodiments of this utility model, the outer wall of the injection molded body 4 is further provided with several protruding ridges 43, the protrusion height of the ridges 43 being equal to the protrusion height of the boss 41.
[0058] A plastic boss 41 was added to the female mold side 1, and the boss 41 is directly above the copper busbar 3.
[0059] The beneficial effects of adopting the above technical solution are: both the protrusions and the protrusions can play a role in preventing scratches and impacts on the injection molded surface of the terminal, and the protrusion is equivalent to having an unexpected additional advantage.
[0060] Figures 1 to 6 The injection molding positioning mechanism and terminals of the copper busbar are displayed together.
[0061] in, Figure 3 and Figure 6 It is in the filling state. Figure 1 and Figure 5 It is in a pressure-holding state. Figure 3 and Figure 6 In the middle, the inlay 5 is in contact with the copper busbar 3. Figure 1 and Figure 5 The middle part is in a state of being detached from copper busbar 3.
[0062] For ease of observation, Figure 3 compared to Figure 1 , Figure 3 Part of the injection-molded body 4 is hidden inside.
[0063] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.
Claims
1. A mechanism for positioning a copper bar by injection molding, characterized by, The utility model relates to a copper bar positioning mechanism, comprising: a clamping groove at one end of the insert for contacting the copper bar, the insert having a linear reciprocating freedom along its length; a spring at the end of the insert away from the copper bar; wherein the width of the bottom of the clamping groove is not less than the thickness of the copper bar, the opening of the clamping groove has a chamfer to enlarge the opening width; one side of the copper bar has a plurality of pins protruding integrally therefrom, and the insert and the pins are respectively located on both sides of the copper bar.
2. The injection molded positioning mechanism for copper bars of claim 1, wherein: The bottom of each clamping groove has two right-angled female corners.
3. The injection molded positioning mechanism for copper bars of claim 1, wherein: The depth of the clamping groove is less than the opening width of the clamping groove.
4. The injection molded positioning mechanism for copper bars of claim 1, wherein: The copper bar is wrapped with an injection-molded body, the copper bar and the injection-molded body form a terminal, the adjacent surface of the outer wall of the injection-molded body to the edge of the copper bar without pins is the female side of the terminal, and the adjacent surface of the outer wall of the injection-molded body to the edge of the copper bar with pins is the male side of the terminal. The vertical distance from the female side to the copper bar plus the depth of the clamping groove is equal to the linear movement length of the insert.
5. The injection molded positioning mechanism for copper bars of claim 1, wherein: The copper bar is in contact with a plurality of inserts, and the inserts in contact with the same copper bar are arranged at intervals.
6. The injection molded positioning mechanism for copper bars of claim 1, wherein: The end of the insert in contact with the spring has an integral bulge.
7. A terminal characterized by comprising: The utility model relates to an injection-molded positioning mechanism comprising the copper bar of any one of claims 1 to 6.
8. The terminal of claim 7, wherein: The terminal comprises a copper bar wrapped with an injection-molded body, and the pins protrude from the injection-molded body.
9. The terminal of claim 8, wherein: When the insert is not in contact with the copper bar, the outer wall of the injection-molded body has an integral boss, and the boss is in concave-convex engagement with the clamping groove.
10. The terminal of claim 9, wherein: The outer wall of the injection-molded body further has a plurality of convex ribs protruding therefrom, and the protruding height of the convex ribs is equal to the protruding height of the boss.