A mold floating pin structure

Abstract

This utility model discloses a mold floating pin structure, including an installation template and a floating pin inserted on the installation template. The floating pin includes a pin rod and a pin head detachably mounted on the pin rod. The installation template has an installation groove, and a guide sleeve is provided in the installation groove. The guide sleeve passes through the guide sleeve, and an anti-rotation protrusion is provided on the guide sleeve. The pin rod has an anti-rotation groove for the anti-rotation protrusion to be inserted into. An elastic element is provided in the installation groove. One end of the elastic element abuts against the installation template, and the other end abuts against the pin rod, so that the floating pin always has a driving tendency to extend out of the installation groove.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a mold floating pin structure. Background Technology

[0002] In the mold demolding process, the ejector pin (also known as the ejector pin or reset pin) is the core ejection component, which plays an important role in pushing the molded product out of the mold cavity.

[0003] The existing traditional float needle structure has obvious shortcomings: First, the guiding performance is poor, and the float needle is prone to deviating when moving repeatedly, which can lead to wear and even jamming. Second, the service life is short. Since the needle body is in direct contact with the template, long-term friction can cause damage to the parts. Third, replacement and maintenance are cumbersome. Since the float needle and template are mostly designed as an integrated unit, the entire structure needs to be disassembled for maintenance, which is not only time-consuming but also labor-intensive. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a mold floating pin structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A mold floating pin structure includes a mounting template and a floating pin inserted on the mounting template. The floating pin includes a pin bar and a pin head detachably disposed on the pin bar.

[0007] The mounting template has a mounting groove, and a guide sleeve is provided in the mounting groove. The guide sleeve passes through the guide sleeve, and an anti-rotation protrusion is provided on the guide sleeve. An anti-rotation groove is provided on the needle rod for the anti-rotation protrusion to be inserted. An elastic element is provided in the mounting groove. One end of the elastic element abuts against the mounting template, and the other end abuts against the needle rod, so that the floating needle always has a driving tendency to extend out of the mounting groove.

[0008] Preferably, the tail of the needle bar forms a limiting step, which abuts against the mounting groove to prevent the float needle from detaching from the mounting groove. Through the above improvement, a limiting step is set at the tail of the needle bar to prevent the float needle from detaching from the mounting groove under the action of the elastic element.

[0009] Preferably, the needle head has a connecting protrusion, and the needle bar has a connecting groove for the connecting protrusion to be inserted. The connecting groove is threadedly connected to the connecting protrusion. Through the above improvements, the connecting protrusion and the connecting groove are threadedly connected to achieve a split design of the entire floating needle, which not only enables quick replacement but also reduces maintenance costs.

[0010] Preferably, the needle head has a connecting protrusion, and the needle bar has a connecting groove for the connecting protrusion to be inserted. The connecting protrusion has a snap-fit ​​protrusion, and the connecting groove has a fixing slot for the snap-fit ​​protrusion to be inserted. Through the above improvements, the snap-fit ​​protrusion and the fixing slot are snapped together, thereby enabling quick connection between the needle head and the needle bar and realizing the split design of the entire floating needle. This not only enables quick replacement but also reduces maintenance costs.

[0011] Preferably, the guide sleeve is interference-fitted with the mounting groove, and a sliding gap is formed between the guide sleeve and the float needle. Through the above improvements, the reliability of the guide sleeve installation is ensured by utilizing the interference fit between the guide sleeve and the mounting groove, and the sliding gap between the guide sleeve and the float needle is provided to ensure the accuracy of the guide.

[0012] Preferably, the inner wall of the guide sleeve is provided with a lubricating coating. Through the above improvements, the frictional resistance between the needle body and the guide sleeve can be effectively reduced, which can reduce component wear and extend service life, and make the floating needle move more smoothly, further ensuring the stability of the ejection action.

[0013] Preferably, the guide sleeve is made of polytetrafluoroethylene (PTFE). Through the above improvements, PTFE has an extremely low coefficient of friction, which can reduce frictional wear between it and the floating needle body, thereby extending the service life of both.

[0014] Preferably, the mounting template has a limiting groove for connecting the elastic element, and the bottom of the needle bar has a lifting groove for inserting the elastic element. Through the above improvements, the stability of the elastic element installation is enhanced.

[0015] Preferably, a lifting spring is provided inside the needle bar, and a lifting plate is connected to the top of the lifting spring. The lifting plate abuts against the needle bar so that the needle bar always has an upward movement tendency. An annular locking part is formed on the groove wall of the connecting groove. The annular locking part communicates with the fixed locking groove. An opening is formed on the annular locking part for the locking protrusion to be inserted. The locking protrusion is inserted into the arc-shaped locking groove along the opening. The locking protrusion rotates along the annular locking part and is inserted into the fixed locking groove under the action of the lifting plate. With the above improvements, during the needle installation process, the connecting protrusion is first inserted into the connecting groove, so that the locking protrusion passes through the opening and enters the annular locking part. The needle is then rotated. After rotating to a certain position, the locking protrusion is inserted into the fixed locking groove under the action of the lifting plate, so as to achieve rapid needle installation.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] The separate design of the needle bar and needle head allows for detachable connection, enabling quick replacement and reducing maintenance costs. Furthermore, the guide sleeve on the mounting template guides the floating needle, and the elastic element cushions it, thereby extending the service life of the floating needle. At the same time, the anti-rotation protrusion and anti-rotation groove cooperate to prevent the floating needle from deflecting, ensuring the linear motion of the ejection action and improving the demolding quality of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the needle bar structure according to Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the needle structure according to Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the guide sleeve according to Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the needle bar structure in Embodiment 2 of this utility model;

[0024] Figure 7 This is a schematic diagram of the needle bar at another angle in Embodiment 2 of this utility model;

[0025] Figure 8 This is a cross-sectional view of the needle bar in Embodiment 2 of this utility model;

[0026] Figure 9 This is a schematic diagram of the needle structure in Embodiment 2 of this utility model;

[0027] In the diagram: 1. Installation template; 2. Floating needle; 1.1. Needle bar; 1.2. Needle head; 1.3. Installation groove; 1.4. Guide sleeve; 1.5. Elastic element; 1.6. Limiting step; 1.7. Anti-rotation protrusion; 1.8. Anti-rotation groove; 2.1. Connecting protrusion; 2.2. Connecting groove; 2.3. Sliding gap; 2.4. Limiting groove; 2.5. Lifting groove; 3.1. Snap-fit ​​protrusion; 3.2. Fixing slot; 3.3. Annular snap-fit ​​part; 3.4. Opening; 3.5. Lifting plate; 3.6. Lifting spring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0030] Example 1

[0031] like Figure 1-5 As shown, a mold floating needle 2 structure includes an installation template 1 and a floating needle 2 inserted on the installation template 1. The floating needle 2 includes a needle rod 1.1 and a needle head 1.2 detachably disposed on the needle rod 1.1.

[0032] Specifically, the mounting template 1 has a mounting groove 1.3, and a guide sleeve 1.4 is provided in the mounting groove 1.3. The guide sleeve 1.4 passes through the guide sleeve 1.4. The guide sleeve 1.4 has an anti-rotation protrusion 1.7, and the needle bar 1.1 has an anti-rotation groove 1.8 for the anti-rotation protrusion 1.7 to be inserted. An elastic element 1.5 is provided in the mounting groove 1.3. One end of the elastic element 1.5 abuts against the mounting template 1, and the other end abuts against the needle bar 1.1, so that the floating needle 2 always has a driving tendency to extend out of the mounting groove 1.3.

[0033] The separate and detachable connection of the needle bar 1.1 and the needle head 1.2 not only enables quick replacement and reduces maintenance costs, but also provides a guide sleeve 1.4 on the mounting template 1 to guide the floating needle 2 and cushion it with an elastic element 1.5, thereby extending the service life of the floating needle 2. At the same time, the anti-rotation protrusion 1.7 cooperates with the anti-rotation groove 1.8 to prevent the floating needle 2 from deflecting, ensuring the linear motion of the ejection action and improving the demolding quality of the product.

[0034] like Figure 1-5 As shown, as a further explanation of the embodiment of the needle bar 1.1 and the needle head 1.2, the tail of the needle bar 1.1 is provided with a limiting step 1.6, which abuts against the mounting groove 1.3 to restrict the floating needle 2 from leaving the mounting groove 1.3. The limiting step 1.6 is provided at the tail of the needle bar 1.1 to prevent the floating needle 2 from leaving the mounting groove 1.3 under the action of the elastic element 1.5.

[0035] Furthermore, a connecting protrusion 2.1 is formed on the needle tip 1.2, and a connecting groove 2.2 is formed on the needle bar 1.1 for the connecting protrusion 2.1 to be inserted. The connecting groove 2.2 is threadedly connected to the connecting protrusion 2.1. By using the threaded connection between the connecting protrusion 2.1 and the connecting groove 2.2, the entire floating needle 2 can be designed as a split unit, which not only enables quick replacement but also reduces maintenance costs.

[0036] like Figure 1-5 As shown, a further explanation of the installation method of guide sleeve 1.4 is provided. Guide sleeve 1.4 is interference-fitted with mounting groove 1.3, and a sliding gap 2.3 is formed between guide sleeve 1.4 and floating needle 2. The interference fit between guide sleeve 1.4 and mounting groove 1.3 ensures the reliability of guide sleeve 1.4 installation, and the sliding gap 2.3 between guide sleeve 1.4 and floating needle 2 ensures the accuracy of guidance.

[0037] Preferably, the sliding gap 2.3 is 0.02 mm.

[0038] Preferably, the inner wall of the guide sleeve 1.4 is provided with a lubricating coating, which can effectively reduce the frictional resistance between the needle body and the guide sleeve 1.4, thereby reducing component wear and extending service life, and making the movement of the floating needle 2 smoother, further ensuring the stability of the ejection action.

[0039] Preferably, the guide sleeve 1.4 is made of polytetrafluoroethylene (PTFE). PTFE has an extremely low coefficient of friction, which can reduce frictional loss between it and the floating needle 2, thereby extending the service life of both.

[0040] As a further explanation of the installation method of the elastic element 1.5, the mounting template 1 is provided with a limiting groove 2.4 for connecting the elastic element 1.5, and the bottom of the needle rod 1.1 is provided with a lifting groove 2.5 for inserting the elastic element 1.5. The bottom of the elastic element 1.5 is inserted into the limiting groove 2.4 and connected to the mounting plate, and the bottom and top of the elastic element 1.5 are inserted into the lifting groove 2.5, thereby improving the stability of the installation of the elastic element 1.5.

[0041] Example 2

[0042] like Figures 6 to 9 As shown, the difference between this embodiment and Embodiment 1 is that the needle tip 1.2 has a connecting protrusion 2.1, and the needle bar 1.1 has a connecting groove 2.2 for the connecting protrusion 2.1 to be inserted. The connecting protrusion 2.1 has a snap-fit ​​protrusion 3.1, and the connecting groove 2.2 has a fixing groove 3.2 for the snap-fit ​​protrusion 3.1 to be inserted. The snap-fit ​​protrusion 3.1 and the fixing groove 3.2 are used to snap together, thereby quickly connecting the needle tip 1.2 and the needle bar 1.1, realizing the split design of the entire floating needle 2, which not only enables quick replacement but also reduces maintenance costs.

[0043] Specifically, a lifting spring 3.6 is provided inside the needle bar 1.1. A lifting plate 3.5 is connected to the top of the lifting spring 3.6. The lifting plate 3.5 abuts against the needle bar 1.1 so that the needle bar 1.1 always has an upward movement tendency. An annular locking part 3.3 is formed on the groove wall of the connecting groove 2.2. The annular locking part 3.3 communicates with the fixed locking groove 3.2. An opening 3.4 is formed on the annular locking part 3.3 for the locking protrusion 3.1 to be inserted.

[0044] During the installation of the needle 1.2, the connecting protrusion 2.1 is first inserted into the connecting groove 2.2, so that the snap-fit ​​protrusion 3.1 passes through the opening 3.4 and enters the annular snap-fit ​​part 3.3. Then, the needle 1.2 is rotated. After rotating to a certain position, the snap-fit ​​protrusion 3.1 is placed into the fixed snap-fit ​​groove 3.2 under the action of the lifting piece 3.5, so as to realize the quick installation of the needle 1.2.

[0045] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A mold floating pin structure, characterized in that, It includes an installation template (1) and a floating needle (2) inserted on the installation template (1), the floating needle (2) including a needle bar (1.1) and a needle tip (1.2) detachably disposed on the needle bar (1.1); The mounting template (1) has a mounting groove (1.3), and a guide sleeve (1.4) is provided in the mounting groove (1.3). The guide sleeve (1.4) passes through the guide sleeve (1.4). The guide sleeve (1.4) has an anti-rotation protrusion (1.7), and the needle bar (1.1) has an anti-rotation groove (1.8) for the anti-rotation protrusion (1.7) to be inserted. An elastic element (1.5) is provided in the mounting groove (1.3). One end of the elastic element (1.5) abuts against the mounting template (1), and the other end abuts against the needle bar (1.1), so that the floating needle (2) always has a driving tendency to extend out of the mounting groove (1.3).

2. The mold floating pin structure according to claim 1, characterized in that: The tail of the needle bar (1.1) forms a limiting step (1.6), which abuts against the mounting groove (1.3) to prevent the float needle (2) from disengaging from the mounting groove (1.3).

3. The mold floating pin structure according to claim 1, characterized in that: The needle tip (1.2) has a connecting protrusion (2.1), and the needle bar (1.1) has a connecting groove (2.2) for the connecting protrusion (2.1) to be inserted into. The connecting groove (2.2) is threadedly connected to the connecting protrusion (2.1).

4. The mold floating pin structure according to claim 1, characterized in that: The needle tip (1.2) has a connecting protrusion (2.1), and the needle bar (1.1) has a connecting groove (2.2) for the connecting protrusion (2.1) to be inserted into. The connecting protrusion (2.1) has a snap-fit ​​protrusion (3.1), and the connecting groove (2.2) has a fixing groove (3.2) for the snap-fit ​​protrusion (3.1) to be inserted into.

5. The mold floating pin structure according to claim 1, characterized in that: The guide sleeve (1.4) is interference-fitted with the mounting groove (1.3), and a sliding gap (2.3) is formed between the guide sleeve (1.4) and the floating needle (2).

6. The mold floating pin structure according to claim 1, characterized in that: The inner wall of the guide sleeve (1.4) is provided with a lubricating coating.

7. The mold floating pin structure according to claim 1, characterized in that: The guide sleeve (1.4) is made of polytetrafluoroethylene.

8. The mold floating pin structure according to claim 1, characterized in that: The mounting template (1) has a limiting groove (2.4) for connecting the elastic element (1.5), and the bottom of the needle bar (1.1) has a lifting groove (2.5) for inserting the elastic element (1.5).

9. A mold floating pin structure according to claim 4, characterized in that: A lifting spring (3.6) is provided inside the needle bar (1.1). A lifting plate (3.5) is connected to the top of the lifting spring (3.6). The lifting plate (3.5) abuts against the needle bar (1.1) so that the needle bar (1.1) always has an upward movement tendency. An annular snap-fit ​​part (3.3) is formed on the groove wall of the connecting groove (2.2). The annular snap-fit ​​part (3.3) communicates with the fixed snap-fit ​​groove (3.2). An opening (3.4) is formed on the annular snap-fit ​​part (3.3) for the snap-fit ​​protrusion (3.1) to be inserted. The snap-fit ​​protrusion (3.1) is inserted into the arc-shaped snap-fit ​​groove along the opening (3.4). The snap-fit ​​protrusion (3.1) rotates along the annular snap-fit ​​part (3.3) and is inserted into the fixed snap-fit ​​groove (3.2) under the action of the lifting plate (3.5).

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