CN109038165B

CN109038165B - Manufacturing process of waterproof connector with double-sided inserted PCB

Info

Publication number: CN109038165B
Application number: CN201810886465.XA
Authority: CN
Inventors: 赖国鹏; 冯显东; 滕万年; 王伟超
Original assignee: Guangdong Natconn Electronic Co ltd
Current assignee: Guangdong Natconn Electronic Co ltd
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2020-04-24
Anticipated expiration: 2038-08-06
Also published as: CN109038165A

Abstract

The invention discloses a manufacturing process of a waterproof connector of a double-sided inserted PCB, which comprises the following 9 production steps of 1, punch forming of a connecting material belt → 2, Molding of a rubber core on the connecting material belt → 3, automatic bending of a terminal → 4, injection Molding of a silica gel outer sleeve → 5, wrapping of the silica gel outer sleeve on a semi-finished product → 6, punch forming of a fishfork piece → 7, bending of the fishfork piece to form a fishfork foot → 8, assembling of the fishfork foot on the rubber core by an automatic machine to form a finished product → 9, and automatic packaging of a coil material. The invention adopts the mode of automatic production and assembly, produces and processes the double-sided inserted PCB waterproof connector in 9 steps, and has high production and processing efficiency and low cost.

Description

Manufacturing process of waterproof connector with double-sided inserted PCB

Technical Field

The invention relates to the technical field of connectors, in particular to a manufacturing process of a waterproof connector of a double-sided inserted PCB.

Background

The conventional connector comprises a plastic main body and a terminal module, wherein the terminal module is generally formed by stamping, the plastic main body and the terminal module are formed by separate molding and then are inserted into each other, and the plastic main body and the terminal module are integrally formed by two modes of integral embedding. Most of the experience of these manufacturing processes comes from the use of relatively flat USB, Type-C, apple joint connectors, etc., but each connector cannot directly apply the process of the conventional connector to the waterproof connector of the double-sided printed circuit board of the present invention due to its own characteristics. And for most of the existing connectors, manual assembly is still used, the labor cost is high, the efficiency is low, and the quality of finished products is unstable.

Disclosure of Invention

In view of the above, the present invention is directed to the defects in the prior art, and the main object of the present invention is to provide a manufacturing process of a waterproof connector for a double-sided printed circuit board, which is automated, has high production efficiency and good quality, and thus overcomes the disadvantages of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a manufacturing process of a waterproof connector of a double-sided inserted PCB comprises the following production steps:

step 1, stamping a connecting material belt on a first production line, wherein the connecting material belt consists of a traction material and a plurality of terminals connected with the traction material, the traction material is provided with a plurality of traction holes, a V-shaped bending groove is arranged between each terminal and the traction material, and two sides of the middle part of each terminal are provided with clamping points;

step 2, placing the connecting material belt into an injection Molding machine, wherein the terminals are in 3PIN groups, and injection Molding a rubber core in a Molding mode by Molding so that the rubber core is coated in the middle of the terminals, the clamping points are embedded into the rubber core, the first ends of the terminals extend out of the top surface of the rubber core, and the second ends of the terminals extend out of the bottom surface of the rubber core; 3 terminal grooves are formed in the upper surface of the rubber core in a concave mode;

and 3, step 3: placing the semi-finished product obtained in the step (2) on an automatic bending machine, bending the first end of each terminal leftwards by the automatic bending machine to enable the first end to arch above the corresponding 3 terminal grooves to form an arc-shaped contact spring sheet, and bending the second end of each terminal rightwards to horizontally extend out of the right side of the rubber core to form an SMT welding leg;

and 4, step 4: on the second production line, a silica gel outer sleeve is formed by injection molding through an injection molding machine, the silica gel outer sleeve is trapezoidal, and a waterproof ring is integrally formed at the top of the silica gel outer sleeve;

and 5, step 5: placing the semi-finished product obtained in the step 3 on an automatic assembling machine, and wrapping the semi-finished product with a silica gel outer sleeve by the automatic assembling machine;

and 6, step 6: stamping and forming the fish fork slices on the third production line;

and 7, step 7: putting the fish spear slices into a bending machine, and bending the fish spear slices by using the bending machine to form fish spear feet;

and 8, step 8: placing the semi-finished product obtained in the step 5 on an automatic assembly machine, arranging the fish fork feet in order through a vibration disc, and loading the fish fork feet into the bottom of the rubber core through a pushing mold to obtain a finished product of the connector;

point 9: and sucking the connector finished products into bins of the material roll by using a mechanical arm, wherein each bin contains one connector finished product, then sealing the bin opening by using an adhesive tape, and coiling the material roll into a coil for packaging.

As a preferred scheme, the connecting belt is a copper belt.

As a preferable scheme, the clamping point is a square buckling point.

Preferably, the 3PIN terminals in the step 2 are respectively a zero line terminal, a live line terminal and a ground line terminal.

As a preferred scheme, the material of the rubber core is PP or PBT or LCP.

As a preferred scheme, the material of the silica gel coat is a formula which is formed by mixing silica gel and fluorescent powder and has a noctilucent effect.

As an optimal scheme, four corners of the bottom of the rubber core are provided with notches, positioning blocks are arranged at four corners of the bottom of the inner cavity of the silica gel outer sleeve, and the positioning blocks are clamped into the notches.

As a preferable scheme, the two fish fork feet are respectively fixed on the front side and the rear side of the rubber core.

As a preferred scheme, the harpoon foot includes fixed part and soldering tin portion, fixed part and soldering tin portion mutually perpendicular, be equipped with the multilayer barb on the fixed part, the end of soldering tin portion is equipped with forked locked groove.

As a preferable scheme, the waterproof connector of the double-sided inserted PCB is of a square structure.

Compared with the prior art, the invention has obvious advantages and beneficial effects, and specifically, according to the technical scheme, the invention designs the following 9 steps: 1. punch forming of the connecting material band → 2, Molding of the rubber core on the connecting material band → 3, automatic bending of the terminal → 4, injection Molding of the silica gel outer sleeve → 5, wrapping of the silica gel outer sleeve outside the semi-finished product → 6, punch forming of the fishfork piece → 7, bending of the fishfork piece to form a fishfork foot → 8, assembling of the fishfork foot on the rubber core by an automatic machine to form a finished product → 9, and automatic packaging of the coil material. The invention adopts the mode of automatic production and assembly, produces and processes the double-sided inserted PCB waterproof connector in 9 steps, and has high production and processing efficiency and low cost.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic view of a stamping molding material connecting belt in step 1 according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of step 2 Molding the tape and the rubber core Molding according to the embodiment of the invention.

Fig. 3 is a schematic view of automatic terminal bending in step 3 according to an embodiment of the present invention.

Fig. 4 is a process diagram for the production and assembly of a step 4-5 silicone jacket according to an embodiment of the present invention.

Fig. 5 is a process diagram for the production and assembly of step 6-8 harpoon legs according to an embodiment of the present invention.

Fig. 6 is a front view of a connector product according to an embodiment of the present invention.

Fig. 7 is a bottom view of the connector of the embodiment of the present invention.

Fig. 8 is a schematic view of the finished connector of the embodiment of the present invention loaded into a roll.

The attached drawings indicate the following:

1. connecting belt 11 and traction material

12. Terminal 121, first end

122. Second end 123, contact shell fragment

124. SMT leg 13, V-shaped bending groove

14. Stuck point 2, rubber core

21. Terminal groove 22, gap

3. Silica gel jacket 31, waterproof ring

32. Positioning block 4 and fish spear foot

41. Fixing portion 42 and solder portion

43. Barb 44, fork-shaped locking groove

5. Material roll 51 and stock bin

52. An adhesive tape.

Detailed Description

Referring to fig. 1 to 8, which show a process flow diagram and a structure diagram of a preferred embodiment of the present invention, a manufacturing process of a waterproof connector of a double-sided-insertion PCB board of the present invention includes the following production steps.

Step 1, referring to fig. 1, a material connecting belt 1 is formed by punching on a first production line, the material connecting belt 1 is composed of a traction material 11 and a plurality of terminals 12 connected to the traction material 11, the traction material 11 is provided with a plurality of traction holes, a V-shaped bending groove 13 is arranged between the terminals 12 and the traction material 11, and two sides of the middle part of each terminal 12 are provided with clamping points 14. After the material connecting belt 1 is formed, the material connecting belt 1 is pulled to a glue injection station through a pulling device.

In this embodiment, the connecting belt 1 is a copper belt, which satisfies the conductive requirement. The clamping points 14 are square buckling points, and compared with round points, the square buckling points have stronger binding force, so that the injection-molded terminal 12 is not easy to separate from plastic.

Step 2, referring to fig. 2, the connecting material belt 1 is placed into an injection Molding machine, the terminals 12 are in a group of 3 PINs, and the rubber cores 2 are injection molded in a Molding manner by Molding, so that the rubber cores 2 are wrapped in the middle of the terminals 12, the clamping points 14 are embedded into the rubber cores 2, the first ends 121 of the terminals 12 extend out of the top surfaces of the rubber cores 2, and the second ends 122 of the terminals 12 extend out of the bottom surfaces of the rubber cores 2; 3 terminal grooves 21 are concavely arranged in the upper surface of the rubber core 2.

Wherein, the terminals 12 of which the 3PIN is a group respectively comprise a zero line terminal, a live wire terminal and a ground wire terminal, and the use requirements of the power supply connector are met. The rubber core 2 is made of PP (polypropylene), PBT (polybutylene terephthalate) or LCP (liquid crystal polymer), and the insulating property can achieve high-current isolation and safe use.

And 3, step 3: referring to fig. 3, the half-mold of step 2 is placed on an automatic bending machine, the automatic bending machine bends the first end 121 of each terminal 12 to the left, so that the first end 121 arches into an arc-shaped contact spring 123 above the corresponding 3 terminal slots 21, and the second end 122 of each terminal 12 bends to the right and horizontally extends out of the right side of the rubber core 2 to form an SMT solder foot 124. Therefore, the contact elastic sheet 123 floats above the rubber core 2 directly, and is convenient to be butted with a corresponding plug, the design has enough elasticity, the contact is better, and the reliability is high.

And 4, step 4: referring to fig. 4, on the second production line, the silica gel outer sleeve 3 is formed by injection molding through an injection molding machine, the silica gel outer sleeve 3 is trapezoidal, and the top of the silica gel outer sleeve 3 is integrally formed with the waterproof ring 31. Like this, with

waterproof circle

31 and 3 direct molding as an organic whole of silica gel overcoat for the outside of whole connector all reaches water-proof effects, especially the top is used for having waterproof circle 31 with the position that the plug meets, can prevent that water from permeating to the inside terminal 12 short circuit that causes of connector. In this embodiment, the material of the silica gel outer sleeve 3 is a formula formed by mixing silica gel and fluorescent powder and having a noctilucent effect, and can emit light when used at night, so that people can conveniently find the socket quickly.

And 5, step 5: referring to fig. 4, the semi-finished product of step 3 is placed on an automatic assembling machine, and the automatic assembling machine wraps the silica gel jacket 3 outside the semi-finished product. Four corners in the bottom of gluey core 2 are provided with breach 22, four corners in the inner chamber bottom of silica gel overcoat 3 are equipped with locating piece 32, and each locating piece 32 is gone into in the incision with the card to prevent the off normal, waterproof performance further strengthens.

And 6, step 6: referring to fig. 5, the harpoon slices are punched on the third production line, and are made of metal sheets and can be suitable for automatic welding after being fixed.

And 7, step 7: and (3) placing the fish spear slices into a bending machine, and bending the fish spear slices by using the bending machine to form the fish spear feet 4. In this embodiment, the two fish-fork legs 4 are respectively fixed to the front and rear sides of the rubber core 2, and are matched with the SMT solder tails 124 of the terminals 12 to achieve the purpose of fast soldering and fixing the connector on the PCB.

In this embodiment, fishfork foot 4 includes fixed part 41 and soldering tin portion 42, fixed part 41 and soldering tin portion 42 mutually perpendicular, be equipped with multilayer barb 43 on the fixed part 41, the end of soldering tin portion is equipped with forked locked groove 44, and barb 43 makes fishfork foot 4 combine can not deviate from in gluey core 2, and forked locked groove 44 stretches the screw of locking after the plug docks.

And 8, step 8: referring to fig. 5, the semi-finished product of the step 5 is placed on an automatic assembly machine, the harpoon feet 4 are arranged in order by a vibrating disk and the harpoon feet 4 are loaded at the bottom of the rubber core 2 by a pushing mold, so as to obtain a finished connector (see fig. 6 and 7), wherein the finished connector is approximately in a square structure.

Point 9: referring to fig. 8, the connector products are sucked into the bins 51 of the roll 5 by the robot, each bin 51 contains one connector product, and then the mouth of the bin 51 is sealed by the adhesive tape 52, and the roll 5 is wound into a roll and packaged.

In summary, the design of the invention is characterized in that the waterproof connector of the double-sided inserted PCB is produced and processed in 9 steps by adopting an automatic production and assembly mode, the production and processing efficiency is high, and the cost is low.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A manufacturing process of a waterproof connector of a double-sided inserted PCB is characterized in that: comprises the following production steps:

2. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the connecting material belt is a copper belt.

3. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the clamping points are square buckling points.

4. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: and the 3PIN terminals in the step 2 are respectively a zero line terminal, a live wire terminal and a ground wire terminal.

5. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the rubber core is made of PP or PBT or LCP.

6. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the silica gel coat is made of a formula formed by mixing silica gel and fluorescent powder and has a noctilucent effect.

7. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the four corners in bottom of gluing the core are provided with the breach, four corners in inner chamber bottom of silica gel overcoat are equipped with the locating piece, and each locating piece blocks with the card in going into the incision.

8. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the two fish fork legs are respectively fixed on the front side and the rear side of the rubber core.

9. The manufacturing process of the waterproof connector of the double-sided inserted PCB board as claimed in claim 1 or 8, wherein: the fishfork foot comprises a fixing part and a soldering tin part, the fixing part is perpendicular to the soldering tin part, multiple layers of barbs are arranged on the fixing part, and a fork-shaped locking groove is formed in the tail end of the soldering tin part.

10. The manufacturing process of the waterproof connector of the double-sided PCB board of claim 1, wherein: the waterproof connector of the double-sided inserted PCB is of a square structure.