Needle placing jig for injection molding
By designing needle placement fixtures for injection molding, the metal needle is fixed using the positioning boss and the fixed hook structure, the unlocking rod controls the fixed hook to detach, and the thimble achieves stable pin insertion, solving the problems of manual pin insertion and high cost of automatic pin insertion, achieving low-cost and efficient production.
Patent Information
- Application Number
- CN202421987547.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-16
AI Technical Summary
In the prior art, manual pin injection molding has the problem of scalding risk, low efficiency and high cost, automatic pin injection molding equipment is high cost, large area and is not suitable for small batch production, and the surface of metal pins is prone to scratches and poor stability.
A needle placement fixture for injection molding is designed, including a positioning boss, a fixed hook, a compression spring and a thimble structure. The metal needle is fixed by the fixed hook, and the unlocking rod controls the fixed hook to disengage. The thimble presses the metal needle into the mold to achieve stable and reliable pin insertion operation.
Improve the operator's working environment at low costs, improve production efficiency, improve product quality, adapt to small batch order production of multiple products, and avoid the problems of large equipment land and high cost.
Smart Images
Figure CN223147625U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding, in particular to a needle placing fixture for injection molding. Background Art
[0002] In current industrial production, most of the embedded injection metal needles are directly inserted into the injection mold cavity manually, or by means of fully automated needle insertion injection molding.
[0003] However, when directly inserting needles manually for injection molding, it is easy to scald the operators due to the high temperature of the mold. In addition, due to the low efficiency of manual needle insertion, the needle insertion time is unstable, and the waiting time for the molten plastic before injection is either short or long, which affects the appearance quality and dimensional stability of the injection molded products.
[0004] While adopting the automated needle insertion injection molding method, the cost is high, the economy is poor, the equipment occupies a large area, the debugging time is long, the flexibility is poor, the product switching is cumbersome, there are many faults, and it is not suitable for small-batch production of multiple products.
[0005] And when adopting the ejector pin type injection needle placing fixture, scratches are easily caused on the surface of the metal needle, and the metal needle is also easy to fall off during the needle insertion process, with poor stability. Summary of the Utility Model
[0006] The main technical problem to be solved by the utility model is to provide a fixture that can improve the working environment of operators at low cost, improve production efficiency, and enhance product quality; and adapt to the production of small-batch orders of multiple products in a low-cost manner.
[0007] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a needle placing fixture for injection molding, including: a mounting base plate, a positioning plate is arranged on the mounting base plate, the positioning plate extends with a positioning boss for supporting the metal needle, a first fixing hook is movably connected to the positioning boss, the first fixing hook is used to fix the metal needle on the positioning boss, a first compression spring is arranged in the positioning boss, and the first compression spring provides pressure for the first fixing hook to press the metal needle. One side of the mounting base plate is floatingly connected with a floating plate, and a first unlocking rod and a first ejector pin are arranged on the floating plate. The first unlocking rod is used to control the position of the first fixing hook so that the first fixing hook disengages from the metal needle, and the first ejector pin presses the metal needle into the plastic mold.
[0008] Preferably, a metal cup is also placed on the positioning boss, a second fixing hook is movably connected to the positioning plate, the second fixing hook is used to fix the metal cup on the positioning plate, a second unlocking rod and a second ejector pin are also arranged on the floating plate. The second unlocking rod is used to control the position of the second fixing hook so that the second fixing hook disengages from the metal cup, and the second ejector pin presses the metal cup into the plastic mold together with the metal needle.
[0009] Preferably, the first fixing hook is rotatably connected to the positioning boss through a first rotating shaft.
[0010] Preferably, a pushing inclined surface is provided on one side of the first unlocking rod in contact with the first fixing hook, a rounded corner matching the pushing inclined surface is provided on one side of the lower end of the first fixing hook in contact with the pushing inclined surface, and the first compression spring is connected to the upper end of the first fixing hook.
[0011] Preferably, positioning posts are provided on the mounting base plate, and the positioning posts are matched with the reference holes of the plastic mold.
[0012] Preferably, support posts are provided on the mounting base plate, and the support posts abut against the plastic mold to support the position of the jig on the plastic mold.
[0013] Preferably, a limiting post is provided on one side of the mounting base plate facing the floating plate to limit the position of the floating plate relative to the mounting base plate. A reset spring is abutted between the mounting base plate and the floating plate, and the reset spring restores the distance between the floating plate and the mounting base plate when the floating plate is not under external force.
[0014] Preferably, a pressing head is provided on one side of the floating plate away from the mounting base plate to facilitate applying force to the floating plate through the pressing head.
[0015] Preferably, a fixing plate is provided on one side of the floating plate away from the mounting base plate. The floating plate and the fixing plate are connected by a connecting column, and the pressing head is mounted on the fixing plate.
[0016] The beneficial effects of the present utility model are as follows: The positioning boss provides position support for the metal needle, and under the action of the first compression spring, the position of the metal needle is fixed by the first fixing hook. Moreover, the position of the first fixing hook can be controlled by the first unlocking rod, thereby achieving the effect of relaxing the metal needle. The first ejector pin moves synchronously with the first fixing hook, so that the metal needle falls into the plastic mold. Description of the Drawings
[0017] Figure 1 Schematic structural diagram of the metal needle and the metal cup;
[0018] Figure 2 Schematic structural diagram of the injection-molded product;
[0019] Figure 3 Schematic structural diagram of the whole of the present utility model;
[0020] Figure 4 Cross-sectional view of the present utility model;
[0021] Figure 5 Schematic diagram of the positional relationship after the present utility model is placed in the plastic mold;
[0022] Figure 6It is a schematic structural view of the plastic mold in a state to be injection-molded after the pins of the present utility model are inserted and the jig is taken out.
[0023] The markings of the various components in the attached drawings are as follows:
[0024] 1. Installation base plate; 2. Positioning plate; 3. Positioning boss; 4. First fixing hook; 5. First rotating shaft;
[0025] 6. First compression spring; 7. Floating plate; 8. First unlocking rod; 9. First ejector pin; 10. Pushing inclined surface; 11. Rounding; 12. Positioning protrusion; 13. Second fixing hook; 14. Positioning column; 15. Support column; 16. Limit column; 17. Plastic mold; 18. Pressing head; 19. Fixing plate; 20. Return spring;
[0026] 21. Metal pin; 22. Metal cup. Detailed implementation manners
[0027] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the attached drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.
[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0030] In the present utility model, unless otherwise clearly specified or limited, terms such as "installation", "connection", "linkage", "fixation" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0031] In the present utility model, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0032] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.
[0033] For the physical quantities in the formula, if there is no separate annotation, they should be understood as the basic quantities of the basic units of the International System of Units, or the derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0034] Embodiment:
[0035] Reference Figures 1 - 6, A needle placement fixture for injection molding, comprising: a mounting base plate 1, a positioning plate 2 is mounted on the mounting base plate 1, the positioning plate 2 extends with a positioning boss 3 for supporting a metal needle 21, a first fixing hook 4 is movably connected to the positioning boss 3, the first fixing hook 4 is rotatably connected to the positioning boss 3 through a first rotating shaft 5, the first fixing hook 4 is used to fix the metal needle 21 on the positioning boss 3, so as to prevent the metal needle 21 from falling before the metal needle 21 is loaded into the plastic mold 17. A first compression spring 6 is installed inside the positioning boss 3, and the first compression spring 6 provides a pressing force for the first fixing hook 4 to press the metal needle 21, so as to force the first fixing hook 4 to press the metal needle 21 tightly on the positioning boss 3. When the metal needle 21 needs to be placed on the positioning boss 3, the operator only needs to manually hold the metal needle 21 and press the chamfer at the head of the first fixing hook 4, and the first fixing hook 4 will overcome the pressing force of the first compression spring 6 and rotate counterclockwise around the first rotating shaft 5. When pressed to the bottom, the first fixing hook 4 will rotate clockwise under the action of the first compression spring 6 and hook 0.3 mm above the upper surface of the metal needle 21, so the metal needle 21 will not fall off the fixture;
[0036] One side of the mounting base plate 1 is floatingly connected with a floating plate 7, a first unlocking rod 8 and a first ejector pin 9 are mounted on the floating plate 7, the first unlocking rod 8 is used to control the position of the first fixing hook 4 so that the first fixing hook 4 disengages from the metal needle 21, and the first ejector pin 9 presses the metal needle 21 into the plastic mold 17. When the floating plate 7 approaches the mounting base plate 1, it simultaneously drives the first unlocking rod 8 and the first ejector pin 9 to move towards the first fixing hook 4 and the metal needle 21 respectively. When the first unlocking rod 8 abuts against the lower end of the first fixing hook 4, it forces the first fixing hook 4 to rotate counterclockwise around the first rotating shaft 5, so that the upper end of the first fixing hook 4 disengages from the fixation of the metal needle 21, and the metal needle 21 is no longer subjected to the pressing force of the first fixing hook 4. As the pressing displacement increases, and under the action of the first ejector pin 9, the metal needle 21 is detached from the positioning boss 3 and pressed into the corresponding position in the plastic mold 17.
[0037] Reference Figure 4 , In order to facilitate the sliding contact between the first unlocking rod 8 and the first fixing hook 4 and thus facilitate the control of the first unlocking rod 8 and the first fixing hook 4, a pushing inclined surface 10 is provided on the side of the first unlocking rod 8 in contact with the first fixing hook 4, and a rounded corner 11 matching the pushing inclined surface 10 is provided on one side of the lower end of the first fixing hook 4 in contact with the pushing inclined surface 10. The first compression spring 6 is connected to the upper end of the first fixing hook 4.
[0038] Reference Figure 3 , Optionally, according to the actual structure of the metal needle 21, a positioning protrusion 12 matching the concave hole of the metal needle 21 can be extended on the positioning boss 3, so that the position of the metal needle 21 on the positioning boss 3 is more stable and plays a positioning role.
[0039] ReferenceFigure 3 and Figure 4 , optionally, when the actual injection molded product still has the metal cup 22 component, the metal cup 22 can also be placed on the positioning boss 3, and a second fixing hook 13 is movably connected to the positioning plate 2. The second fixing hook 13 is rotatably connected to the positioning plate 2 through a second rotating shaft. The second fixing hook 13 is used to sleeved the metal cup 22 on the positioning boss 3 and fix it on the positioning plate 2. Similarly, a second compression spring (not shown in the figure) can also be installed in the positioning plate 2 to provide pressure for the second fixing hook 13.
[0040] Reference Figure 3 and Figure 4 , optionally, a second unlocking rod (not shown in the figure) and a second ejector pin (not shown in the figure) are also installed on the floating plate 7. The second unlocking rod is used to control the position of the second fixing hook 13 so that the second fixing hook 13 disengages from the metal cup 22, and the second ejector pin presses the metal cup 22 into the plastic mold 17 together with the metal pin 21.
[0041] Reference Figures 3 - 6 , a positioning column 14 is installed on the mounting base plate 1. The positioning column 14 is matched with the reference hole of the plastic mold 17, so as to ensure the accuracy of the docking of the jig and the plastic mold 17, and further ensure that the metal pin 21 and the metal cup 22 are accurately located in the corresponding positions of the plastic mold 17.
[0042] Reference Figures 3 - 6 , a support column 15 is installed on the mounting base plate 1. The support column 15 abuts against the plastic mold 17 and is used to support the position of the jig on the plastic mold 17.
[0043] Reference Figure 3 and Figure 4 , a limiting column 16 is installed on one side of the mounting base plate 1 facing the floating plate 7, which is used to limit the minimum position of the floating plate 7 relative to the mounting base plate 1, so as to limit the extreme positions of the unlocking pin and the ejector pin. A reset spring 20 is abutted between the mounting base plate 1 and the floating plate 7. The reset spring 20 resets the distance between the floating plate 7 and the mounting base plate 1 when the floating plate 7 is not affected by external forces, so as to reset the positions of the unlocking pin and the ejector pin.
[0044] Reference Figure 3 and Figure 4 , a pressure head 18 is installed on one side of the floating plate 7 away from the mounting base plate 1, so as to facilitate the operator to apply force to the floating plate 7 through the pressure head 18.
[0045] Reference Figure 3 and Figure 4 , a fixing plate 19 is arranged on one side of the floating plate 7 away from the mounting base plate 1. The floating plate 7 and the fixing plate 19 are connected by a connecting column, and the pressure head 18 is installed on the fixing plate 19.
[0046] Reference Figures 1 - 6, Operation process: The operator places the metal needle 21 and the metal cup 22 along the chamfers at the heads of the first fixing hook 4 and the second fixing hook 13 on the positioning boss 3 and the positioning plate 2. At this time, the first fixing hook 4 and the second fixing hook 13 fix the metal needle 21 and the metal cup 22. Then the operator holds the jig and docks it with the plastic mold 17 through the positioning post 14, supports the position of the jig through the support post 15, and then presses the press head 18 to force the first fixing hook 4 and the second fixing hook 13 to release the fixation of the metal needle 21 and the metal cup 22. Then the first ejector pin 9 and the second ejector pin gradually press the metal needle 21 and the metal cup 22 into the plastic mold 17. At this time, the metal needle 21 and the metal cup 22 are in the plastic mold 17, and the plastic mold 17 is in a state waiting for injection molding. Finally, the press head 18 is released, and the floating plate 7 is reset under the action of the return spring 20, and the operator removes the jig.
[0047] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.
Claims
1. An injection needle placement fixture, characterized in that Including: An installation base plate (1), on which a positioning plate (2) is provided. The positioning plate (2) extends a positioning boss (3) for supporting a metal needle (21). A first fixing hook (4) is movably connected to the positioning boss (3). The first fixing hook (4) is used to fix the metal needle (21) on the positioning boss (3). A first compression spring (6) is arranged in the positioning boss (3). The first compression spring (6) provides pressure for the first fixing hook (4) to press the metal needle (21). One side of the installation base plate (1) is floatingly connected with a floating plate (7). The floating plate (7) is provided with a first unlocking rod (8) and a first ejector pin (9). The first unlocking rod (8) is used to control the position of the first fixing hook (4) so that the first fixing hook (4) disengages from the metal needle (21). The first ejector pin (9) presses the metal needle (21) into a plastic mold (17).
2. The needle placing fixture for injection molding according to claim 1, characterized in that: A metal cup (22) is also placed on the positioning boss (3). A second fixing hook (13) is movably connected to the positioning plate (2). The second fixing hook (13) is used to fix the metal cup (22) on the positioning plate (2). The floating plate (7) is also provided with a second unlocking rod and a second ejector pin. The second unlocking rod is used to control the position of the second fixing hook (13) so that the second fixing hook (13) disengages from the metal cup (22). The second ejector pin presses the metal cup (22) into the plastic mold (17) together with the metal needle (21).
3. The needle placing fixture for injection molding according to claim 1, characterized in that: The first fixing hook (4) is rotatably connected to the positioning boss (3) through a first rotating shaft (5).
4. The needle placing jig for injection molding according to claim 3, wherein: On the side of the first unlocking rod (8) in contact with the first fixing hook (4), a pushing inclined surface (10) is provided. On one side of the lower end of the first fixing hook (4) in contact with the pushing inclined surface (10), a fillet (11) matching the pushing inclined surface (10) is provided. The first compression spring (6) is connected to the upper end of the first fixing hook (4).
5. The needle placing fixture for injection molding according to claim 1, wherein: Positioning columns (14) are provided on the installation base plate (1). The positioning columns (14) are matched with the reference holes of the plastic mold (17).
6. The needle placement fixture for injection molding according to claim 1, wherein: Support columns (15) are provided on the installation base plate (1). The support columns (15) abut against the plastic mold (17) and are used to support the position of the fixture on the plastic mold (17).
7. A needle placement fixture for injection molding according to claim 1, characterized in that: On the side of the installation base plate (1) facing the floating plate (7), a limiting column (16) is provided to limit the position of the floating plate (7) relative to the installation base plate (1). A reset spring (20) is abutted between the installation base plate (1) and the floating plate (7). The reset spring (20) restores the distance between the floating plate (7) and the installation base plate (1) when the floating plate (7) is not under external force.
8. The needle placing fixture for injection molding according to claim 7, characterized in that: On the side of the floating plate (7) away from the installation base plate (1), a pressure head (18) is provided to facilitate applying force to the floating plate (7) through the pressure head (18).
9. The needle placing fixture for injection molding according to claim 8, wherein: On the side of the floating plate (7) away from the installation base plate (1), a fixing plate (19) is provided. The floating plate (7) and the fixing plate (19) are connected by connecting columns. The pressure head (18) is installed on the fixing plate (19).