Insert pin for injection mold

Abstract

The utility model relates to the technical field of insert pin nuts, in particular to an insert pin for an injection mold, which comprises a pin body, a limit piece and a fixing block, the pin body comprises a tail cap, a pin rod and a plug which are connected in sequence, the limit piece comprises a fixing part and two elastic parts, and the fixing block is arranged on the fixing part. The two elastic parts are arranged on the two sides of the fixing part respectively, the ends, away from the fixing part, of the elastic parts protrude out of the side face of the plug, movable spaces are formed between the elastic parts, and the fixing block is connected with the needle rod and penetrates through the fixing part to be connected with the plug in an inserted mode. According to the insert pin for the injection mold disclosed by the utility model, when an injection molding machine is closed, the limiting piece on the insert pin is matched with the embedded part (such as a nut), so that the influence of vibration on the embedded part (such as the nut) and injection molding pressure after the mold is closed can be effectively reduced, the separation of the embedded part and the insert pin is effectively avoided, and the aims of improving the injection molding yield and reducing the injection molding cost are fulfilled.

Description

Technical Field

[0001] This utility model relates to the field of insert nut technology, and in particular to an insert for injection molds. Background Technology

[0002] With the development of injection molding technology, pre-embedded injection molding technology has emerged. Pre-embedded injection molding technology is a molding technology in which pre-prepared embedded parts (such as nuts, metal inserts, waterproof plugs, etc.) are placed in specific positions of the mold during the injection molding process, and then molten plastic is injected to form an integral molding technology with the embedded parts and the plastic parts.

[0003] In traditional technology, to prevent the nut from shifting during the injection molding process, insert pins are usually used to connect the nut and ensure the injection accuracy of the nut. However, due to the vibration generated when the injection molding machine closes the mold and the internal injection pressure after the mold closes, the nut is prone to separate from the insert pin, resulting in a decrease in injection yield. There is a technical problem that the poor fixing effect between the insert pin and the nut leads to an increase in injection cost. Utility Model Content

[0004] Therefore, it is necessary to provide an insert for injection molds to address the technical problem of increased injection molding costs caused by poor fixing effect of inserts and nuts.

[0005] A pin for injection molds includes: a pin body, a limiting plate, and a fixing block. The pin body includes a tail cap, a pin shank, and a plug connected in sequence. The limiting plate includes a fixing part and an elastic part. There are two elastic parts, which are respectively disposed on both sides of the fixing part. The end of each elastic part away from the fixing part protrudes from the side of the plug. There is a movable space between each elastic part. The fixing block is connected to the pin shank and passes through the fixing part to be inserted into the plug.

[0006] In one embodiment, the elastic portion has a guide surface that is inclined from one end of the elastic portion away from the fixing portion toward the fixing portion.

[0007] In one embodiment, the needle body further includes a positioning piece, the plug has a receiving groove, the positioning piece is connected to the plug and protrudes from the receiving groove.

[0008] In one embodiment, the positioning piece includes a limiting portion and an arc-shaped portion. The limiting portion is disposed within the receiving groove, and the arc-shaped portion is connected to the limiting portion and protrudes from the receiving groove.

[0009] In one embodiment, the plug is further provided with a slot communicating with the receiving groove, and the limiting part is inserted into the slot.

[0010] In one embodiment, there are two limiting parts, which are respectively disposed on both sides of the arc-shaped part.

[0011] In one embodiment, the arcuate portion is arranged in an arc shape.

[0012] In one embodiment, the fixing block includes a connecting part and a plug, the connecting part is connected to the needle bar, the plug passes through the fixing part and is inserted into the plug, and the plug has a socket that mates with the plug.

[0013] In one embodiment, the fixing part is provided with a through hole for the insertion post to pass through.

[0014] In one embodiment, the needle bar has a connecting hole at one end near the connecting portion, and the connecting portion has a mounting hole that mates with the connecting hole.

[0015] The beneficial effects of the insert pin for injection molds provided in this application are as follows: The fixing part of the limiting plate is fixed by the cooperation of the pin body and the fixing block. The two elastic parts of the limiting plate protruding from the side of the plug allow the elastic parts to contact the inner wall of the embedded part and generate a certain elastic force when the insert pin is inserted into the embedded part (such as a nut), thereby clamping the embedded part. Simultaneously, the fixing block passes through the fixing part and is inserted into the plug, fixing the limiting plate onto the pin body to maintain the positional stability of the limiting plate. The movement space between the elastic parts allows them to undergo a certain elastic deformation when squeezed by the embedded part, adapting to embedded parts of different sizes and enhancing the connection stability between the insert pin and the embedded part. During injection molding, the cooperation between the limiting plate on the insert pin and the embedded part (such as a nut) effectively reduces the impact of vibration on the embedded part (such as the nut) and the injection pressure after mold closing, thereby effectively preventing separation of the embedded part from the insert pin, achieving the goal of improving injection molding yield and reducing injection molding costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the insert pin for the injection mold shown in this utility model;

[0017] Figure 2 for Figure 1 An exploded view of the insert pins used in the injection mold shown;

[0018] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the insert used in the injection mold.

[0019] Figure 4 for Figure 1 The diagram shows the structure of the fixing block for the insert pin in the injection mold.

[0020] The meanings of the numbers in the attached diagram are as follows:

[0021] 100. Insert pins for injection molds;

[0022] 10. Needle body; 11. Tail cap; 12. Needle bar; 121. Connecting hole; 13. Plug; 131. Receiving slot; 132. Slot; 133. Insertion hole; 14. Positioning plate; 141. Limiting part; 142. Arc-shaped part;

[0023] 20. Limiting piece; 21. Fixing part; 211. Through hole; 22. Elastic part; 221. Guide surface; 23. Movement space;

[0024] 30. Fixing block; 31. Connecting part; 311. Mounting hole; 32. Insert post. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] In the description of this 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] like Figures 1 to 2 As shown, it is the insert pin 100 for injection mold of this utility model, used to fix the embedded part (such as nut).

[0032] like Figures 1 to 2As shown, the injection mold insert 100 includes: a needle body 10, a limiting piece 20, and a fixing block 30. The needle body 10 includes a tail cap 11, a needle bar 12, and a plug 13 connected in sequence. The limiting piece 20 includes a fixing part 21 and an elastic part 22. There are two elastic parts 22, each located on opposite sides of the fixing part 21, with one end of each elastic part 22 protruding from the side of the plug 13. There is a space 23 between the elastic parts 22. The fixing block 30 is connected to the needle bar 12 and passes through the fixing part 21 to insert into the plug 13. The fixing part 21 of the limiting piece 20 is fixed by the cooperation of the needle body 10 and the fixing block 30. The two elastic parts 22 of the limiting piece 20 protruding from the side of the plug 13 are used to fix the insert. When the needle is inserted into the embedded part (such as a nut), the elastic part 22 can contact the inner wall of the embedded part and generate a certain elastic force, thereby clamping the embedded part. At the same time, the fixing block 30 passes through the fixing part 21 and is inserted into the plug 13 to fix the limiting piece 20 on the needle body 10 to maintain the positional stability of the limiting piece 20. The movable space 23 between each elastic part 22 allows the elastic part 22 to undergo a certain elastic deformation when squeezed by the embedded part, adapting to embedded parts of different sizes and enhancing the connection stability between the insert and the embedded part. When the injection molding machine closes the mold, the cooperation between the limiting piece 20 on the insert and the embedded part (such as a nut) can effectively reduce the impact of vibration on the embedded part (such as a nut) and the injection pressure after mold closing, thereby effectively preventing the embedded part from separating from the insert, achieving the purpose of improving the injection molding yield and reducing the injection molding cost.

[0033] The following text, combined with Figures 1 to 4 The above-mentioned injection mold insert 100 will be further explained.

[0034] In order to avoid damage to the embedded parts, such as Figure 2 As shown, the elastic part 22 has a guide surface 221. The guide surface 221 is inclined from the end of the elastic part 22 away from the fixed part 21 toward the fixed part 21. The guide surface 221 facilitates the smooth insertion of the embedded part into the plug 13 along the guide surface 221 during installation, reducing the resistance during installation and enabling the embedded part to be inserted into the pin more quickly and accurately, thus improving the operating efficiency. At the same time, it also avoids damage to the embedded part or the pin caused by installation difficulties.

[0035] To effectively reduce the possibility of embedded parts shifting, such as Figures 1 to 3As shown, the needle body 10 also includes a positioning piece 14, and the plug 13 is provided with a receiving groove 131. The positioning piece 14 is connected to the plug 13 and protrudes from the receiving groove 131. The positioning piece 14 can further position the embedded part. When the embedded part is sleeved on the plug 13, the part of the positioning piece 14 protruding from the receiving groove 131 can cooperate with the specific structure of the embedded part (such as grooves, holes, etc.) to restrict the movement of the embedded part in the radial direction of the plug 13, thereby improving the positioning accuracy of the embedded part and ensuring that the embedded part remains stable during the injection molding process, thus effectively reducing the possibility of the embedded part shifting.

[0036] To further enhance the fixing effect on embedded parts, such as Figures 2 to 3 As shown, the positioning piece 14 includes a limiting part 141 and an arc-shaped part 142. The limiting part 141 is disposed in the receiving groove 131. The arc-shaped part 142 is connected to the limiting part 141 and protrudes from the receiving groove 131. The limiting part 141 is disposed in the receiving groove 131, which enables the positioning piece 14 to be stably installed on the plug 13. The arc-shaped part 142 protrudes from the receiving groove 131, and its arc-shaped structure can better contact the inner wall of the embedded part, forming a surface contact or line contact, increasing the contact area between the positioning piece 14 and the embedded part, thereby providing stronger positioning force and friction, effectively preventing the embedded part from sliding in the axial direction of the plug 13, and further enhancing the fixing effect of the embedded part.

[0037] To ensure that the positioning piece 14 can continuously and effectively position and fix the embedded part, such as Figure 3 As shown, the plug 13 is also provided with a slot 132 that communicates with the receiving groove 131. The limiting part 141 is inserted into the slot 132. The setting of the slot 132 provides an installation position for the limiting part 141, so that the limiting part 141 can be accurately inserted into the slot 132, ensuring that the connection between the positioning piece 14 and the plug 13 is more stable, preventing the positioning piece 14 from loosening or falling off during use, thereby ensuring that the positioning piece 14 can continuously and effectively position and fix the embedded part.

[0038] To improve the overall stability and reliability of the positioning piece 14, such as Figure 3 As shown, there are two limiting parts 141, which are respectively disposed on both sides of the arc-shaped part 142. The two limiting parts 141 are respectively disposed on both sides of the arc-shaped part 142, which can support and fix the arc-shaped part 142 from both sides, so that the arc-shaped part 142 is subjected to uniform force when subjected to the pressure of the embedded part, and is not easy to deform or tilt. This ensures that the arc-shaped part 142 can always fit well with the embedded part, thereby improving the overall stability and reliability of the positioning piece 14.

[0039] To improve the fit accuracy between the curved part 142 and the embedded part, and to enhance the fixing effect, such as Figure 3 As shown, the arc-shaped part 142 is arranged in an arc shape. The arc structure has good mechanical properties, can evenly distribute the pressure it receives, reduce stress concentration, and enable the arc-shaped part 142 to withstand greater force without damage when in contact with the embedded part. At the same time, it can better adapt to the inner wall shape of the embedded part, thereby improving the fitting accuracy between the arc-shaped part 142 and the embedded part and enhancing the fixing effect.

[0040] To ensure the fixing effect of the limiting piece 20 on the embedded part, such as Figures 3 to 4 As shown, the fixing block 30 includes a connecting part 31 and a plug 32. The connecting part 31 is connected to the needle bar 12. The plug 32 passes through the fixing part 21 and is inserted into the plug 13. The plug 13 has a socket 133 that mates with the plug 32. The connecting part 31 is connected to the needle bar 12, so that the fixing block 30 can be stably installed on the needle body 10. The plug 32 mates with the socket 133 of the plug 13 to connect the fixing block 30 and the plug 13 together, thereby fixing the limiting piece 20 on the needle body 10. This structural design makes the connection between the fixing block 30, the needle body 10 and the plug 13 more secure, and can effectively transmit force to ensure that the limiting piece 20 will not be displaced during injection molding, thus achieving the purpose of ensuring the fixing effect of the limiting piece 20 on the embedded part.

[0041] like Figure 2 As shown, the fixing part 21 is provided with a through hole 211 for the insertion post 32 to pass through. The through hole 211 provides a passage for the insertion post 32 to pass through smoothly through the fixing part 21 and be inserted into the plug 13, ensuring the smooth connection between the fixing block 30, the limiting piece 20 and the needle body 10. At the same time, it also enables the fixing part 21 to be accurately positioned on the needle body 10, ensuring that the position of the limiting piece 20 meets the design requirements, thereby playing its due fixing role.

[0042] like Figure 3 As shown, the needle bar 12 has a connecting hole 121 at one end near the connecting part 31, and the connecting part 31 has a mounting hole 311 that mates with the connecting hole 121. The mating of the connecting hole 121 and the mounting hole 311 facilitates the fixing of the connecting part 31 to the needle bar 12 using bolts, screws, or other connecting parts. This connection method is convenient for installation and disassembly, and facilitates the assembly and maintenance of the insert. It also ensures the connection strength between the connecting part 31 and the needle bar 12, ensuring that the fixing block 30 will not fall off the needle bar 12 during use, thus improving the overall reliability of the insert.

[0043] In actual use, the injection mold insert 100 provided in this application is used as follows: the insert is installed on the injection mold, and the pin body 10 of the insert is positioned and fixed by the tail cap 11. When it is necessary to fix embedded parts such as nuts, the embedded parts are inserted into the plug 13 along the guide surface 221 of the elastic part 22. The elastic part 22 undergoes elastic deformation under the pressure of the embedded parts, and the embedded parts are clamped by the elastic force. At the same time, the arc-shaped part 142 of the positioning piece 14 contacts the inner wall of the embedded parts, further positioning and fixing the embedded parts. The fixing block 30 is inserted into the plug 13 through the insert post 32 to fix the limiting piece 20 in a suitable position, ensuring that the elastic part 22 and the positioning piece 14 can function stably. During the injection process, even if subjected to mold closing vibration and injection pressure, the embedded parts can be firmly fixed on the insert, reducing the occurrence of displacement and separation, thereby improving the injection yield and reducing the injection cost.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pin for injection molds, characterized in that, include: The device comprises a needle body, a limiting piece, and a fixing block. The needle body includes a tail cap, a needle shaft, and a plug connected in sequence. The limiting piece includes a fixing part and an elastic part. There are two elastic parts, which are respectively disposed on both sides of the fixing part. The end of each elastic part away from the fixing part protrudes from the side of the plug. There is a movable space between each elastic part. The fixing block is connected to the needle shaft and passes through the fixing part to be inserted into the plug.

2. The insert for injection molds according to claim 1, characterized in that, The elastic part has a guide surface, which is inclined from the end of the elastic part away from the fixed part toward the fixed part.

3. The insert for injection molds according to claim 1, characterized in that, The needle body also includes a positioning piece, the plug has a receiving groove, the positioning piece is connected to the plug and protrudes from the receiving groove.

4. The insert for injection molds according to claim 3, characterized in that, The positioning piece includes a limiting part and an arc-shaped part. The limiting part is disposed in the receiving groove, and the arc-shaped part is connected to the limiting part and protrudes from the receiving groove.

5. The insert for injection molds according to claim 4, characterized in that, The plug is also provided with a slot that communicates with the receiving groove, and the limiting part is inserted into the slot.

6. The insert for injection molds according to claim 4, characterized in that, The number of limiting parts is two, and the two limiting parts are respectively disposed on both sides of the arc-shaped part.

7. The insert for injection molds according to claim 4, characterized in that, The arc-shaped portion is arranged in an arc shape.

8. The insert for injection molds according to claim 1, characterized in that, The fixing block includes a connecting part and a plug. The connecting part is connected to the needle bar. The plug passes through the fixing part and is inserted into the plug. The plug has a socket that mates with the plug.

9. The insert for injection molds according to claim 8, characterized in that, The fixing part is provided with a through hole for the insertion post to pass through.

10. The insert for injection molds according to claim 8, characterized in that, The needle bar has a connecting hole at one end near the connecting part, and the connecting part has a mounting hole that mates with the connecting hole.

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