Composite environment-friendly plastic insert

Abstract

The utility model relates to a composite environment-friendly plastic insert which comprises a metal ring, two knurled ferrules are arranged on the outer surface of the metal ring in a sleeved mode, a head metal ring belt is arranged on the top of the metal ring, a plurality of arc-shaped knurled grooves are formed in the outer surfaces of the two knurled ferrules, an inner through hole is formed in the metal ring, and the inner through hole is communicated with the head metal ring belt. An inner ring of the metal ring is provided with internal threads, the metal ring, the knurled ferrules and the head metal ring belt are integrally formed and are made of brass or stainless steel or aluminum alloy, and the rotating direction of the arc-shaped knurled grooves in the knurled ferrules on the top is opposite to that of the arc-shaped knurled grooves in the knurled ferrules on the bottom. According to the composite type environment-friendly plastic insert, the hole wall of the hot-melted plastic part is completely attached to the arc-shaped knurling grooves through the arc-shaped knurling grooves in the two knurling ferrules of the insert, meanwhile, the knurling rotation directions of the two arc-shaped knurling grooves are opposite, and therefore the effects that the connection strength of the plastic part and the insert is high, and the stability is better are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal insert technical field, concretely is a kind of composite environmental protection plastic insert. BACKGROUND

[0002] In the manufacturing process of plastic parts, metal inserts are often embedded in plastic parts to enhance the connection strength or provide threaded connection function. Traditional metal inserts are usually embedded in plastic parts by mechanical pressing or injection molding, but these methods have problems such as complex installation, insufficient connection strength and poor stability. Therefore, a metal insert with easy installation and high connection strength is proposed to solve the above problems. SUMMARY

[0003] To overcome the shortcomings of the prior art, the utility model provides a composite environmental protection plastic insert, which has the advantages of easy installation, high connection strength and good stability, and solves the problems of good stability and poor connection strength.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a composite environmental protection plastic insert, comprising a metal ring, the outer surface of the metal ring is provided with two knurled sleeves, the top of the metal ring is provided with a head metal ring belt, the outer surface of the two knurled sleeves is provided with a plurality of arc-shaped knurled grooves, the inside of the metal ring is provided with an inner through hole, and the inner ring of the metal ring is provided with an internal thread.

[0005] Further, the metal ring, knurled sleeve and head metal ring belt are integrally formed, and the material is brass, stainless steel or aluminum alloy.

[0006] Further, the plurality of arc-shaped knurled grooves on the top knurled sleeve are opposite in rotation direction to the plurality of arc-shaped knurled grooves on the bottom knurled sleeve.

[0007] Further, the head metal ring belt is a high-temperature-resistant circular sealing ring.

[0008] Further, the plastic part is sleeved on the outside of the metal ring by hot melting.

[0009] Compared with the prior art, the technical scheme of the present application has the following advantages:

[0010] The composite environmental protection plastic insert uses the arc-shaped knurled grooves on the two knurled sleeves of the insert to make the hole wall of the hot-melted plastic part completely fit the arc-shaped knurled grooves, and the knurls of the two arc-shaped knurled grooves are opposite in direction, thereby realizing high connection strength and good stability of the plastic part and the insert. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1This is a schematic diagram of the composite environmentally friendly plastic insert of this utility model;

[0012] Fig. 2 This is a partial cross-sectional view of the composite environmentally friendly plastic insert of this utility model.

[0013] In the diagram: 1. Metal ring; 2. Knurled ring; 3. Curved knurled groove; 4. Head metal ring band; 5. Internal thread; 6. Internal through hole. Detailed Implementation

[0014] 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.

[0015] Please see Figs. 1-2 This embodiment of a composite environmentally friendly plastic insert includes a metal ring 1, which is the inner metal tube of the insert. The outer surface of the metal ring 1 is fitted with two knurled rings 2, which are annular rings with arc-shaped knurled strips. The top of the metal ring 1 is provided with a head metal ring strip 4, which is a metal ring that closes the end face of the plastic part. The outer surfaces of the two knurled rings 2 are provided with several arc-shaped knurled grooves 3 to increase the connection strength and stability between the plastic part and the metal insert. The metal ring 1 has an inner through hole 6 and an inner thread 5.

[0016] In this embodiment, the metal ring 1, the knurled collar 2, and the head metal ring band 4 are integrally formed, and the materials are brass, stainless steel, or aluminum alloy.

[0017] In this embodiment, the several arc-shaped knurled grooves 3 on the top knurled collar 2 rotate in the opposite direction to the several arc-shaped knurled grooves 3 on the bottom knurled collar 2.

[0018] It should be noted that the several arc-shaped knurled grooves 3 on the two knurled rings 2 are opposite, which can increase friction and improve stability of the plastic part when subjected to rotational force.

[0019] In this embodiment, the head metal ring 4 is a high-temperature resistant circular sealing ring.

[0020] In this embodiment, the plastic part is fitted onto the outside of the metal ring 1 by heat fusion.

[0021] It should be noted that the hot melt method uses a hot melt machine to heat the insert and simultaneously press it into the pre-drilled hole in the plastic part to fix the plastic part to the insert.

[0022] The working principle of the above embodiments is as follows:

[0023] When it is needed to fix the plastic part and the insert by the hot melt machine, the insert can be heated to 200-250 DEG C by the heating device, then the butt joint hole of the plastic part is inserted into the surface of the insert, so that the hole wall of the plastic part is softened, the softened hole wall of the plastic part is completely matched with the knurled sleeve 2 on the outer surface of the metal ring 1, so that the softened glue of the plastic part is tightly matched inside the arc-shaped knurled groove 3 on the knurled sleeve 2 to realize the effect of high connection strength and stability, at the same time, the head metal ring 4 on the top of the metal ring 1 can also be matched on the surface of the plastic part to realize the effect of sealing the hole wall of the plastic part and the surface of the insert, finally the required bolt is screwed on the internal thread 5 of the inner through hole 6 to fix, so the assembly of the plastic part and the insert can be completed.

[0024] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action without necessarily requiring or implying that these entities or actions are in any way mutually exclusive or directional. Moreover, the terms "include", "have", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements is not limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0025] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite environmentally friendly plastic insert comprising a metal ring (1), characterized in that: The outer surface of the metal ring (1) is sleeved with two knurled sleeves (2), the top of the metal ring (1) is provided with a head metal ring belt (4), the outer surface of each of the two knurled sleeves (2) is provided with a plurality of arc-shaped knurled grooves (3), the inside of the metal ring (1) is provided with an inner through hole (6), and the inner ring of the metal ring (1) is provided with an inner thread (5).

2. The composite environmentally friendly plastic insert according to claim 1, wherein: The metal ring (1), the knurled sleeve (2) and the head metal ring belt (4) are integrally formed, and the material is brass, stainless steel or aluminum alloy.

3. The composite environmentally friendly plastic insert of claim 1, wherein: The rotating directions of the arc-shaped knurled grooves (3) on the top knurled sleeve (2) and the arc-shaped knurled grooves (3) on the bottom knurled sleeve (2) are opposite.

4. The composite environmentally friendly plastic insert of claim 1, wherein: The head metal ring belt (4) is a high-temperature-resistant circular sealing ring.

5. The composite environmentally friendly plastic insert of claim 1, wherein: The outer part of the metal ring (1) is sleeved with a plastic part on the outside through a hot melting mode.

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