Secondary injection molding PIN structure with O-shaped ring

Abstract

The utility model relates to the technical field of automobile thermal management systems, in particular to a secondary injection molding PIN structure with O-shaped rings, which is characterized in that the fixed position of a metal rod is processed, a wire groove capable of accommodating two sealing rings is processed, the sealing rings are sleeved in the sealing ring wire groove, and the metal rod sleeved with the sealing rings is placed in a mold for injection molding of an injection molding part. The contact area of the sealing ring and the sealing ring wire groove is increased through the injection molding part, constant pressure is set during injection molding to guarantee secondary injection molding of the sealing ring, the constant pressure can further extrude the sealing ring, and therefore the sealing performance of the whole sensor after injection molding is improved, and the service life of the sensor is prolonged. By adding double O, system misjudgment caused by seepage due to poor sealing performance of SUS304 and PP5 materials during primary injection molding is reduced; comprising a metal rod, an injection molding part and sealing rings, the metal rod is provided with a plurality of groups of sealing ring wire grooves, each group of sealing ring wire grooves are respectively sleeved with a group of sealing rings, the metal rod is sleeved with the injection molding part through an injection molding process, and the plurality of groups of sealing rings are all arranged on the inner side of the injection molding part.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive thermal management systems, and in particular to a PIN pin structure with secondary injection molding and O-rings. Background Technology

[0002] With the rapid development of new energy vehicles, various liquid storage containers and their associated liquid level sensors are constantly emerging. Traditional liquid level sensors mainly adopt pin-type or float-type structures, which have the following drawbacks: pin-type sensors are prone to misjudgment due to liquid leakage; float-type sensors are prone to jamming; in the existing pin-type structure, the seal between the metal rod and the plastic injection body is insufficient, and liquid leakage is prone to occur after long-term use. Especially when the system operating pressure changes frequently, the insufficient sealing performance of the traditional structure can cause liquid to seep in, resulting in abnormal current conduction and affecting the accuracy of liquid level detection. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a PIN pin structure with secondary injection molding and O-ring.

[0004] This utility model discloses a PIN pin structure with secondary injection molding and O-rings, comprising a metal rod, an injection molded part, and sealing rings. The metal rod has multiple sets of sealing ring grooves, each groove housing a sealing ring. The injection molded part is mounted on the metal rod via injection molding, with the multiple sealing rings located inside the injection molded part. The metal rod is machined in a fixed position to create grooves that can accommodate two sealing rings. The sealing rings are fitted into these grooves. The metal rod with the sealing rings is then placed into a mold for injection molding. This process increases the contact area between the sealing rings and the sealing ring grooves. A constant pressure is set during injection molding to ensure secondary injection molding of the sealing rings. This constant pressure further compresses the sealing rings, thereby improving the overall sealing performance of the sensor after injection molding. The addition of double O-rings reduces leakage caused by poor sealing between the SUS304 and PP5 materials during the initial injection molding, which could lead to system misjudgments.

[0005] Preferably, the metal rod is made of 0Cr18Ni9.

[0006] Preferably, the sealing ring is made of EPDM.

[0007] Preferably, the injection molded part is made of PP5.

[0008] Preferably, the number of sealing ring grooves is two sets.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: the metal rod is fixed in position and processed to form a groove that can accommodate two sealing rings. The sealing rings are fitted into the sealing ring grooves. The metal rod with the sealing rings is placed into the mold for injection molding. The injection molded part increases the contact area between the sealing rings and the sealing ring grooves. A constant pressure is set during injection to ensure that the sealing rings are injected a second time. The constant pressure will further compress the sealing rings, thereby improving the sealing performance of the overall sensor injection after injection molding. By adding double O, the poor sealing performance of SUS304 and PP5 materials during the initial injection is reduced, which may cause leakage and system misjudgment. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 It is along Figure 1 A cross-sectional view of line A-A in the middle.

[0012] The attached diagram is labeled as follows: 1. Metal rod; 2. Injection molded part; 3. Sealing ring. Detailed Implementation

[0013] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0014] Example

[0015] like Figure 1 and Figure 2 As shown, this utility model discloses a PIN pin structure with secondary injection molding and O-rings, comprising a metal rod 1, an injection molded part 2, and a sealing ring 3. The metal rod 1 is provided with multiple sets of sealing ring grooves, and a set of sealing rings 3 is respectively fitted on each set of sealing ring grooves. The injection molded part 2 is fitted onto the metal rod 1 through an injection molding process, and the multiple sets of sealing rings 3 are all inside the injection molded part 2. The metal rod 1 is made of 0Cr18Ni9, the sealing rings 3 are made of EPDM, the injection molded part 2 is made of PP5, and there are two sets of sealing ring grooves.

[0016] In this embodiment, the metal rod 1 is machined at a fixed position to form a groove that can accommodate two sealing rings. The sealing ring 3 is fitted into the sealing ring groove. The metal rod 1 with the sealing ring 3 is placed into the mold for injection molding of the injection molded part 2. The injection molded part 2 increases the contact area between the sealing ring 3 and the sealing ring groove. A constant pressure is set during injection to ensure that the sealing ring 3 is injected a second time. The constant pressure will further compress the sealing ring 3, thereby improving the sealing performance of the overall sensor injection after injection molding. By adding double O, the poor sealing performance of SUS304 and PP5 materials during the initial injection is reduced, which may cause leakage and system misjudgment.

[0017] The sealing ring 3 of the PIN pin structure with secondary injection molding and O-ring of this utility model is purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0018] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A PIN pin structure with secondary injection molding and O-ring, comprising a metal rod (1), an injection molded part (2), and a sealing ring (3), characterized in that, The metal rod (1) is provided with multiple sets of sealing ring grooves, and each set of sealing rings (3) is fitted on each set of sealing ring grooves. The injection molded part (2) is fitted on the metal rod (1) by injection molding process, and the multiple sets of sealing rings (3) are all inside the injection molded part (2).

2. The PIN pin structure with secondary injection molding and O-ring as described in claim 1, characterized in that, The metal rod (1) is made of 0Cr18Ni9.

3. The PIN pin structure with secondary injection molding and O-ring as described in claim 1, characterized in that, The sealing ring (3) is made of EPDM.

4. The PIN pin structure with secondary injection molding and O-ring as described in claim 1, characterized in that, The injection molded part (2) is made of PP5.

5. The PIN pin structure with secondary injection molding and O-ring as described in claim 1, characterized in that, The number of sealing ring grooves is two sets.

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