Nut positioning and supporting structure
The positioning and supporting structure for nuts in injection molds uses cylindrical and square pins to stabilize blind hole nuts, addressing positioning issues and ensuring stable mold operation without altering the nut's shape, thus enhancing production quality.
Patent Information
- Application Number
- CN202421696288.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In composite injection mold operations, blind hole nuts lack effective positioning and support, leading to unstable product positioning and potential leakage issues when suspended in the mold core.
A positioning and supporting structure using three cylindrical pins to clamp the nut, with a square pin providing additional clamping force and limiting movement in the XY plane, and a square needle limiting rotation in the XY direction, ensuring stable placement and support.
The structure effectively limits the nut's movement and rotation, allowing for stable production and quality assurance without modifying the nut's location, ensuring smooth operation and consistent mold performance.
Smart Images
Figure CN222245814U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection mold parts, in particular to a positioning and supporting structure for nuts. Background Art
[0002] In some composite injection mold operations with embedded nuts, when the blind hole nut is placed in the male mold, the blind hole nut is suspended in the mold core, that is, as shown in the attached Figure 1 As shown, the nut 2 is on the female mold 1, corresponding to the attached Figure 2 On the male mold 3 shown, the nut 2 has no positioning or support, so it is difficult to form. One way to solve this problem is to reverse the mold of the product, add a clamping hole or apply for product glue reduction treatment, increase positioning and support. If the mold is reversed and the internal thread is used for positioning, the product position will be poor and unstable. Blind hole nuts will increase leakage and affect the function. Utility Model Content
[0003] The problem to be solved by the utility model is to provide a positioning and supporting structure for the nut, using three cylindrical pins to clamp the nut and limit its freedom in the XY plane, and the square pin further presses against the nut, greatly improving the clamping force, limiting the lifting freedom of the nut in the Z direction, and also limiting the rotation freedom of the nut in the XY direction, ultimately positioning and supporting the nut. This mechanism is suitable for the positioning field of small workpieces in molds.
[0004] In order to solve the above problems, the utility model provides a positioning and supporting structure for a nut. To achieve the above purpose, the technical solution adopted by the utility model to solve its technical problems is:
[0005] A positioning and supporting structure for a nut, comprising: a cylindrical needle, the outer wall of which is cylindrical, three cylindrical needles are arranged in parallel to each other and surround a space for accommodating the nut; a square needle, the outer wall of which is prismatic, the length direction of the square needle is perpendicular to the length direction of the cylindrical needle; the cylindrical needle and the square needle both have linear telescopic freedom along their respective length directions; the side surface of the cylindrical needle and the end of the square needle can contact and limit the side surface of the nut.
[0006] The beneficial effect of adopting the above technical solution is that when the nut is placed in the mold, the up and down movement and left and right movement of the nut can be limited. The three cylindrical needles clamp the nut and limit its freedom in the XY plane. The square needle further presses against the nut, greatly increasing the clamping force, limiting the lifting and lowering freedom of the nut in the Z direction, and also limiting the rotational freedom of the nut in the XY direction, ultimately playing a role in positioning and supporting. The cylindrical needle can form a line contact with the outer wall of the nut. When the cylindrical needle and the square needle retract, the nut can be freely taken and placed.
[0007] Finally, the nut and bushing can be well positioned, and the customer does not need to modify the shape of the part where the nut is located, which is conducive to the mold product order. The mold using this positioning and support structure can also achieve stable production and guaranteed quality.
[0008] As a further improvement of the utility model, the tops of the three cylindrical needles are respectively in the same plane, and the roots of the three cylindrical needles are respectively in the same plane; the square needle is located between the tops and the roots of the cylindrical needles.
[0009] The beneficial effect of adopting the above technical solution is: ensuring that the square pin can abut against the outer wall of the nut.
[0010] As a further improvement of the present invention, the distance between adjacent cylindrical needles is smaller than the outer diameter of the nut; and the length of the cylindrical needle is smaller than the axial length of the nut.
[0011] The beneficial effect of adopting the above technical solution is that two cylindrical needles cannot limit all translational degrees of freedom of the nut in the XY plane, and the three-cylindrical needle design can ensure that the three cylindrical needles can contact the outer wall of the nut. If the number is greater than three, not every cylindrical needle can be in close contact with the nut.
[0012] As a further improvement of the utility model, the width of the square needle is greater than the diameter of the cylindrical needle, and the square needle is a quadrangular prism.
[0013] The beneficial effect of adopting the above technical solution is that the shape of the square needle can avoid its own rotation and provide guidance for its own extension and contraction. Each time the square needle end contacts the side wall of the nut, the actual contact area of each contact can be guaranteed.
[0014] As a further improvement of the utility model, the cylindrical needle passes through a movable block, the movable block is movably assembled with the cylindrical needle through the first hole, the movable block is movably assembled with a male mold, the movable block has a linear reciprocating degree of freedom along the length direction of the cylindrical needle, and the positions of the cylindrical needle and the male mold are relatively fixed.
[0015] The beneficial effect of adopting the above technical solution is that the movable block and the cylindrical needle move relative to each other. When a design is to fix the cylindrical needle, that is, when the root of the cylindrical needle is fixed integrally with the male mold, the movement of the movable block can be used to make the cylindrical needle have a relative telescopic effect.
[0016] As a further improvement of the utility model, the square needle passes through a male mold, the male mold has a second hole for the square needle to movably pass through, and the square needle is driven by a linear cylinder to perform linear reciprocating motion.
[0017] The beneficial effect of adopting the above technical solution is that there is only one square needle, so it is suitable to be driven alone. There are multiple cylindrical needles, and the movable block can be driven alone to make multiple cylindrical needles extend and retract synchronously, which has a better effect.
[0018] As a further improvement of the utility model, when the movable block is lifted, the cylindrical needle is relatively retracted; when the cylindrical needle is located at its own retraction limit position, the top of the cylindrical needle is flush with the top surface of the movable block; when the square needle is located at its own retraction limit position, the end of the square needle is flush with the surface of the male mold.
[0019] The beneficial effect of adopting the above technical solution is that when the cylindrical needle and the square needle move and retract to the extreme position, the surface of the mold is relatively flat and smooth.
[0020] As a further improvement of the utility model, the movable block is also movably equipped with a boss through the third hole, the position of the boss and the male mold is relatively fixed, the extension direction of the boss is parallel to the length direction of the cylindrical needle, and the diameter of the boss is larger than the diameter of the cylindrical needle.
[0021] The beneficial effects of adopting the above technical solution are: the thick boss can play the role of a guide column, and the top of the boss can be against other moving parts in the mold to protect the movable block and the cylindrical needle.
[0022] As a further improvement of the utility model, the bottom of the movable block has a bottom inclined surface facing obliquely downward, and the public mold also includes a translation block, one end of the translation block has a top inclined surface facing obliquely upward, the bottom inclined surface and the top inclined surface are parallel to each other, and the translation block has a translation freedom perpendicular to the movement direction of the movable block; when the bottom inclined surface and the top inclined surface contact each other, the translation block drives the movable block to move in a straight line.
[0023] The beneficial effect of adopting the above technical solution is: utilizing the force component of the bottom inclined surface and the top inclined surface to move the movable block, thereby facilitating the directional layout of the power parts in the mold.
[0024] As a further improvement of the utility model, the male mold is also provided with an elastic pin, which is connected to a compression spring. The length direction of the elastic pin is parallel to the movement direction of the translation block, and the side of the movable block is provided with a positioning pit for the end of the elastic pin to selectively contact the positioning pit; when the end of the elastic pin contacts the positioning pit, the movable block is at the extreme position of its own movement.
[0025] The beneficial effect of adopting the above technical solution is that the elastic pin provides a certain elastic locking effect on the extreme position, ensuring that the cylindrical needle is either kept in the most extended or the most retracted position. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0027] Figure 1 It is a structural schematic diagram of the prior art;
[0028] Figure 2 It is a structural schematic diagram of the prior art;
[0029] Figure 3 It is a structural schematic diagram of an implementation mode of the utility model;
[0030] Figure 4 It is a structural schematic diagram of an implementation mode of the utility model;
[0031] Figure 5 It is a structural schematic diagram of an implementation mode of the utility model;
[0032] Figure 6 It is a structural schematic diagram of an implementation mode of the utility model;
[0033] Figure 7 It is a structural schematic diagram of an implementation mode of the utility model;
[0034] Figure 8 It is a structural schematic diagram of an implementation method of the utility model.
[0035] 1-female mold; 2-nut; 3-male mold; 4-cylindrical needle; 5-square needle; 6-linear cylinder; 7-movable block; 8-boss; 9-first hole; 10-second hole; 11-third hole; 12-bottom slope; 13-top slope; 14-translation block; 15-elastic pin; 16-compression spring; 17-positioning pit. DETAILED DESCRIPTION
[0036] The following is a further detailed description of the present invention in conjunction with specific embodiments:
[0037] In order to achieve the purpose of the utility model, a positioning and supporting structure for nuts includes: a cylindrical needle 4, whose outer wall is cylindrical, three cylindrical needles 4 are arranged in parallel and surround a space for accommodating the nut 2; a square needle 5, whose outer wall is prismatic, and whose length direction is perpendicular to that of the cylindrical needle 4; both the cylindrical needle 4 and the square needle 5 have linear telescopic freedom along their respective length directions; the side of the cylindrical needle 4 and the end of the square needle 5 can contact and limit the side of the nut 2. The nut 2 can be a blind hole nut 2.
[0038] In addition, if Figure 3 As shown, the extension direction of the square needle 5 does not intersect with the cylindrical needle 4 .
[0039] The beneficial effect of adopting the above technical solution is that when the nut is placed in the mold, the up and down movement and left and right movement of the nut can be limited. The three cylindrical needles clamp the nut and limit its freedom in the XY plane, and the square needle further presses against the nut, greatly increasing the clamping force, limiting the lifting and lowering freedom of the nut in the Z direction, and also limiting the rotation freedom of the nut in XY, ultimately playing a role in positioning and supporting. The cylindrical needle can form a line contact with the outer wall of the nut. When the cylindrical needle and the square needle retract, the nut can be freely taken and placed. Finally, the nut and the bushing can be well positioned, and the customer does not need to modify the shape of the local part of the product where the nut is located, which is conducive to the product order of the mold. The mold using this positioning and support structure can also achieve stable production and guaranteed quality.
[0040] In some other embodiments of the present invention, the tops of the three cylindrical needles 4 are in the same plane, and the roots of the three cylindrical needles 4 are also in the same plane; the square needle 5 is located between the top and the root of the cylindrical needle 4.
[0041] The beneficial effect of adopting the above technical solution is: ensuring that the square pin can abut against the outer wall of the nut.
[0042] In some other embodiments of the present invention, the distance between adjacent cylindrical needles 4 is smaller than the outer diameter of the nut 2 ; and the length of the cylindrical needle 4 is smaller than the axial length of the nut 2 .
[0043] The beneficial effect of adopting the above technical solution is that two cylindrical needles cannot limit all translational degrees of freedom of the nut in the XY plane, and the three-cylindrical needle design can ensure that the three cylindrical needles can contact the outer wall of the nut. If the number is greater than three, not every cylindrical needle can be in close contact with the nut.
[0044] In some other embodiments of the present invention, the width of the square needle 5 is greater than the diameter of the cylindrical needle 4, and the square needle 5 is a quadrangular prism.
[0045] The beneficial effect of adopting the above technical solution is that the shape of the square needle can avoid its own rotation and provide guidance for its own extension and contraction. Each time the square needle end contacts the side wall of the nut, the actual contact area of each contact can be guaranteed.
[0046] In other embodiments of the utility model, the cylindrical needle 4 passes through a movable block 7, the movable block 7 is movably assembled with the cylindrical needle 4 through the first hole 9, the movable block 7 is movably assembled with the male mold 3, the movable block 7 has a linear reciprocating degree of freedom along the length direction of the cylindrical needle 4, and the positions of the cylindrical needle 4 and the male mold 3 are relatively fixed.
[0047] The beneficial effect of adopting the above technical solution is that the movable block and the cylindrical needle move relative to each other. When a design is to fix the cylindrical needle, that is, when the root of the cylindrical needle is fixed integrally with the male mold, the movement of the movable block can be used to make the cylindrical needle have a relative telescopic effect.
[0048] In other embodiments of the present invention, the square needle 5 passes through the male mold 3, and the male mold 3 has a second hole 10 for the square needle 5 to move through. Figure 5 As shown, the square needle 5 is driven by a linear cylinder 6 to perform linear reciprocating motion.
[0049] The beneficial effect of adopting the above technical solution is that there is only one square needle, so it is suitable to be driven alone. There are multiple cylindrical needles, and the movable block can be driven alone to make multiple cylindrical needles extend and retract synchronously, which has a better effect.
[0050] In other embodiments of the utility model, when the movable block 7 is lifted, the cylindrical needle 4 is relatively retracted; when the cylindrical needle 4 is located at its own retraction limit position, the top of the cylindrical needle 4 is flush with the top surface of the movable block 7; when the square needle 6 is located at its own retraction limit position, the end of the square needle 5 is flush with the surface of the male mold 3.
[0051] The beneficial effect of adopting the above technical solution is that when the cylindrical needle and the square needle move and retract to the extreme position, the surface of the mold is relatively flat and smooth.
[0052] In other embodiments of the present invention, the movable block 7 is further movably equipped with a boss 8 through the third hole 11, the boss 8 is relatively fixed to the position of the male mold 3, and the extending direction of the boss 8 is parallel to the length direction of the cylindrical needle 4, such as Figure 4 As shown, the diameter of the boss 8 is greater than the diameter of the cylindrical needle 4 .
[0053] In addition, the height of the top of the boss 8 is not lower than the height of the top of the cylindrical needle 4 .
[0054] The beneficial effects of adopting the above technical solution are: the thick boss can play the role of a guide column, and the top of the boss can be against other moving parts in the mold to protect the movable block and the cylindrical needle.
[0055] In other embodiments of the present invention, the bottom of the movable block 7 has a bottom inclined surface 12 facing obliquely downward, and the public mold 3 also includes a translation block 14, one end of the translation block 14 has a top inclined surface 13 facing obliquely upward, the bottom inclined surface 12 and the top inclined surface 13 are parallel to each other, and the translation block 14 has a translation freedom perpendicular to the movement direction of the movable block 7; when the bottom inclined surface 12 and the top inclined surface 13 contact each other, the translation block 14 drives the movable block 7 to move in a straight line.
[0056] The beneficial effect of adopting the above technical solution is: utilizing the force component of the bottom inclined surface and the top inclined surface to move the movable block, thereby facilitating the directional layout of the power parts in the mold.
[0057] In other embodiments of the present invention, Figure 8As shown, the male mold 3 is also provided with an elastic pin 15, which is connected to a compression spring. The length direction of the elastic pin 15 is parallel to the movement direction of the translation block 14, and the side of the movable block 7 is provided with a positioning pit 17 for the end of the elastic pin 15 to selectively contact. When the end of the elastic pin 15 contacts the positioning pit 17, the movable block 7 is at the extreme position of its own movement, that is, the corresponding cylindrical needle 4 is at the extreme position of extension or the extreme position of retraction.
[0058] The beneficial effect of adopting the above technical solution is that the elastic pin provides a certain elastic locking effect on the extreme position, ensuring that the cylindrical needle is either kept in the most extended or the most retracted position.
[0059] In some other embodiments of the present invention, the translation block drives the cylindrical needle 4 and the boss 8 to perform linear telescopic motion, that is, the positions of the cylindrical needle 4 and the boss 8 relative to the main body of the male mold 3 are changed, and at the same time, the position of the movable block 7 relative to the main body of the male mold 3 remains unchanged. That is, "one static and one dynamic" is maintained, so that the cylindrical needle 4 and the movable block 7 have relative freedom of motion.
[0060] In order to express the principle clearly, Figures 3 to 8 There are also differences between them. Figure 3 , Figure 4 , Figure 6 , Figure 7 It is basically a local stereoscopic view of an approximate size. Figure 5 The viewing angle is wider and includes the linear cylinder 6. Figure 8 It is also a cross-sectional view.
[0061] Figure 3 The nut 2 is hidden in the figure, but the cylindrical needle 4 and the square needle 5 are both in the extended state. Figure 4 compared to Figure 3 , nut 2 is displayed. Figure 6 The cylindrical needle 4 and the square needle 5 are both retracted.
[0062] In a sense, Figures 1 to 4 , Figures 6 to 8 Because the positioning and supporting mechanism can be used on certain specific injection molds in need, the overall mold diagram is not shown in the drawings of this specification, but it does not affect the expression of the technical principle of the positioning and supporting structure.
[0063] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A positioning and supporting structure for a nut, characterized in that: include: The cylindrical needle has a cylindrical outer wall, and three cylindrical needles are arranged parallel to each other and enclose a space for the nut to be accommodated; The square needle has a prismatic outer wall, and the length direction of the square needle is perpendicular to the length direction of the cylindrical needle; The cylindrical needle and the square needle both have linear telescopic freedom along their respective length directions; the side surface of the cylindrical needle and the end of the square needle can contact and limit the side surface of the nut.
2. The nut positioning and supporting structure according to claim 1, characterized in that: The tops of the three cylindrical needles are respectively in the same plane, and the roots of the three cylindrical needles are also in the same plane; the square needle is located between the tops and the roots of the cylindrical needles.
3. The nut positioning and supporting structure according to claim 1, characterized in that: The distance between adjacent cylindrical needles is smaller than the outer diameter of the nut; and the length of the cylindrical needles is smaller than the axial length of the nut.
4. The nut positioning and supporting structure according to claim 1, characterized in that: The width of the square needle is greater than the diameter of the cylindrical needle, and the square needle is a quadrangular prism.
5. The nut positioning and supporting structure according to claim 1, characterized in that: The cylindrical needle passes through a movable block, the movable block is movably assembled with the cylindrical needle through a first hole, the movable block is movably assembled with a male mold, the movable block has a linear reciprocating degree of freedom along the length direction of the cylindrical needle, and the positions of the cylindrical needle and the male mold are relatively fixed.
6. The nut positioning and supporting structure according to claim 5, characterized in that: The square needle passes through a male mold, and the male mold is provided with a second hole for the square needle to pass through movably. The square needle is driven by a linear cylinder to make a linear reciprocating motion.
7. The nut positioning and supporting structure according to claim 6, characterized in that: When the movable block is lifted, the cylindrical needle relatively retracts; when the cylindrical needle is at its own retraction limit position, the top of the cylindrical needle is flush with the top surface of the movable block; when the square needle is at its own retraction limit position, the end of the square needle is flush with the surface of the male mold.
8. The nut positioning and supporting structure according to claim 5, characterized in that: The movable block is also movably equipped with a boss through the third hole. The position of the boss and the male mold is relatively fixed. The extension direction of the boss is parallel to the length direction of the cylindrical needle. The diameter of the boss is greater than the diameter of the cylindrical needle.
9. The nut positioning and supporting structure according to claim 5, characterized in that: The bottom of the movable block has a bottom inclined surface facing obliquely downward, and the public mold also includes a translation block, one end of the translation block has a top inclined surface facing obliquely upward, the bottom inclined surface and the top inclined surface are parallel to each other, and the translation block has a translation freedom perpendicular to the movement direction of the movable block; when the bottom inclined surface and the top inclined surface contact each other, the translation block drives the movable block to move in a straight line.
10. The nut positioning and supporting structure according to claim 5, characterized in that: The male mold is also provided with an elastic pin, which is connected to a compression spring. The length direction of the elastic pin is parallel to the movement direction of the translation block. The side of the movable block is provided with a positioning pit for the end of the elastic pin to selectively contact. When the end of the elastic pin contacts the positioning pit, the movable block is at the extreme position of its own movement.