CN115946290A

CN115946290A - Injection molding method of module assembly type connector

Info

Publication number: CN115946290A
Application number: CN202211224703.3A
Authority: CN
Inventors: 姜竹山
Original assignee: Dongguan Shouya Plastic Hardware Products Co ltd
Current assignee: Dongguan Shouya Plastic Hardware Products Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-04-11

Abstract

The invention discloses an injection molding method of a module assembly type connector, which relates to the field of connectors and comprises the following steps: s1, arranging a plurality of first fixing holes on the upper plastic body; s2, arranging a plurality of second fixing holes on the lower plastic body; s3, inserting the PIN into the first fixing hole of the upper plastic body; s4, aligning the lower plastic body with the upper plastic body, sleeving the second fixing hole from the bottom of the PIN inserting needle, and fixing the lower plastic body at the bottom of the upper plastic body to obtain a terminal assembly to be welded; s5, placing the terminal assembly into an injection mold, performing plastic welding between the upper plastic body and the lower plastic body by using an injection molding machine, performing plastic welding between the PIN contact PIN and the first fixing hole and between the PIN contact PIN and the second fixing hole to form a shell outside the upper plastic body and the lower plastic body, and cooling and then opening the mold to obtain a product; the invention can avoid the surface of the PIN contact PIN from scratching or wearing, and improve the yield and stability of conduction; only once injection molding is needed, and the production efficiency is improved.

Description

Injection molding method of module assembly type connector

Technical Field

The invention relates to the technical field of connectors, in particular to an injection molding method of a module assembly type connector.

Background

The connector is generally provided with a PIN corresponding to the connecting equipment, and the PIN is plugged with the connecting equipment during connection so as to transmit and electrically connect signals. The PIN is generally plated with copper on the surface to improve the conductivity of the connector, and the copper is soft. The production process of the conventional connector is generally as follows: firstly, inserting a PIN needle into an injection mold, and performing injection molding on the injection mold by using an injection molding machine, so that an inner film is injection molded on the outer layer of the PIN needle, wherein the injection mold has the requirement of hardness and is generally a steel mold, so that when the PIN needle is inserted into the mold, a copper layer on the surface of the PIN needle is easily scratched and abraded no matter the PIN needle is swung manually or mechanically, and the condition of poor contact is easily generated when the produced connector is subsequently connected with connecting equipment; in addition, after the inner film is injection molded on the outer side of the PIN needle, the outer film is injection molded on the outer side of the inner film by replacing an injection mold, so that two injection molding processes are required, and the production efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides an injection molding method of a module assembly type connector, which adopts a soft upper plastic body and a soft lower plastic body to pre-position a PIN contact PIN, can avoid scratching or abrasion on the surface of the PIN contact PIN and improve the yield and stability of conduction; only one-time injection molding is needed, and the production efficiency can be greatly improved.

In order to achieve the above object, the present invention provides an injection molding method of a module assembly type connector, comprising the steps of:

s1, firstly, injection molding an upper plastic body by using a mold, wherein a plurality of first fixing holes for fixing PIN PINs are arranged on the upper plastic body;

s2, using a mold to perform injection molding on a lower plastic body, wherein a plurality of second fixing holes for fixing the PIN PINs are arranged on the lower plastic body;

s3, inserting the PIN contact PIN into the first fixing hole of the upper plastic body, and pre-positioning the PIN contact PIN at the moment;

s4, aligning the lower plastic body with the upper plastic body so that the second fixing hole is aligned with the first fixing hole in the vertical direction, sleeving the second fixing hole from the bottom of the PIN inserting needle, and fixing the lower plastic body at the bottom of the upper plastic body to obtain a terminal assembly to be welded;

s5, placing the terminal assembly into an injection mold, carrying out plastic welding between the upper plastic body and the lower plastic body by the injection molding machine, carrying out plastic welding between the PIN contact PIN and the first fixing hole and the second fixing hole so as to form a shell outside the upper plastic body and the lower plastic body, connecting the shell with the upper plastic body and the lower plastic body into a whole,

and S6, cooling and then opening the mold to obtain the injection molding product.

Among the above-mentioned technical scheme, the shell of product forms the ascending holding tank of opening with the top of last plastic body in the S6 step, and the PIN contact PIN of this technical scheme of being convenient for is connected with outside cable.

Among the above-mentioned technical scheme, be provided with on the PIN contact PIN and lean on the fixed part, in the S3 step, the PIN contact PIN inserts in the first fixed orifices, leans on the fixed part to lean on and fix the bottom/top at first fixed orifices when targetting in place, and the PIN contact PIN of being convenient for carries out prepositioning.

In the above technical solution, the bottom of the upper plastic body injection molded in the step S1 is provided with a bearing portion, the bearing portion of the upper plastic body is arranged on the top of the lower plastic body in the terminal assembly obtained after the assembly in the step S4, so that a space gap exists between the upper plastic body and the lower plastic body, which is convenient for the injection molding machine in the step S5 to perform plastic welding on the upper plastic body and the lower plastic body.

In the technical scheme, the outer side of the shell is provided with the clamping hook through injection molding.

In the above technical solution, the number of the terminal assemblies in the step S5 is 2, 2 terminal assemblies are placed together in a mold, an injection molding machine performs plastic welding on the 2 terminal assemblies and injection-molds and fixes the 2 terminal assemblies together, and a housing is formed at the outer sides of the two terminal assemblies.

In the above technical solution, the bottom of the housing is provided with a baffle plate located between the PIN PINs on the two terminal assemblies.

Among the above-mentioned technical scheme, be provided with a plurality of louvre on the outer wall of shell.

In the technical scheme, the method further comprises S7, and bending the PIN PINs of the molded product by 90 degrees.

Compared with the prior art, the invention has the beneficial effects that:

1. the prior art need be moulded plastics in inserting steel injection mold with the PIN contact PIN, and the copper plate on PIN contact PIN surface is easy to be worn and torn or by the scratch with steel mold to lead to the connector contact failure that produces, technical scheme adopts soft last plastic body and lower plastic body, and the PIN contact PIN is inserting plastic body and lower plastic body can not receive wearing and tearing, the production of the defective products that has significantly reduced.

2. In the prior art, an inner film is firstly injected outside a PIN contact PIN, then a mould is replaced, and an outer film is injected outside the inner film; this technical scheme is PIN contact PIN earlier and is inserted in the first fixed orifices of plastic body, then aligns through last plastic body and plastic body down and insert the plastic body down with the PIN contact PIN, has formed plug terminal this moment, then moulds plastics and form the protection and fix the shell of plastic body and plastic body down in plug terminal's the outside, and this technical scheme only needs once to mould plastics and can mould plastics, improves greatly than the general its production efficiency of prior art, and production efficiency can promote more than ten times.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a method for injection molding a modular connector assembly according to the present invention;

FIG. 2 is a top view of a method of injection molding a modular connector assembly according to the present invention;

FIG. 3 is a first exploded view of a method of injection molding a modular assembly connector according to the present invention;

FIG. 4 is a second exploded view of a method of injection molding a modular connector assembly according to the present invention;

fig. 5 is a third exploded view of the injection molding method of the module-mounted connector according to the present invention.

The reference numbers of the figures are: 1. applying a plastic body; 11. a first fixing hole; 12. a bearing part; 14. a support portion; 2. a plastic body is put down; 21. a second fixing hole; 3. a PIN is inserted; 31. abutting against the fixed part; 4. a housing; 41. a hook is clamped; 42. heat dissipation holes; 5. accommodating grooves; 6. and a baffle plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 5, the present embodiment provides a method for injection molding a module-mountable connector, which includes the steps of:

s1, firstly, an upper plastic body 1 is formed by injection molding through a mold, and a plurality of first fixing holes 11 for fixing PIN PINs 3 are arranged on the upper plastic body 1 in an arrayed manner; preferably, the bottom of the upper plastic body 1 is provided with a bearing portion 12, wherein the bearing portion 12 is mainly located at four corners of the bottom of the upper plastic body 1, and a strip-shaped bearing portion 12 may be provided in the middle of the bottom.

S2, use plastic body 2 under the mould injection moulding, arrange down on the plastic body 2 and be provided with a plurality of second fixed orifices 21 that are used for fixed PIN contact PIN 3, wherein, when lower plastic body 2 aligns with last plastic body 1, second fixed orifices 21 and first fixed orifices 11 will align in vertical direction, and the PIN contact PIN 3 of being convenient for can be fixed simultaneously in first fixed orifices 11 and second fixed orifices 21.

S3, inserting the PIN 3 into the first fixing hole 11 of the upper plastic body 1, and pre-positioning the PIN 3 at the moment; wherein, be provided with on PIN contact PIN 3 and lean on fixed part 31, PIN contact PIN 3 inserts in first fixed orifices 11 from the bottom of last plastic body 1, lean on fixed part 31 to lean on and fix the bottom at first fixed orifices 11 when targetting in place, of course in other embodiments, also can insert first fixed orifices 11 with PIN contact PIN 3 from the top of last plastic body 1 in, lean on fixed part 31 to lean on and fix the top at first fixed orifices 11 when targetting in place, be convenient for control combination back each PIN contact PIN 3's length, thereby be convenient for this technical scheme's connector is connected with other connections, this contact PIN process can adopt artifical or pendulum PIN machine to insert PIN in addition.

S4, lower plastic body 2 is aligned with upper plastic body 1, so that second fixing hole 21 and first fixing hole 11 are aligned in the vertical direction, second fixing hole 21 is sleeved from the bottom of PIN PIN 3, lower plastic body 2 is fixed at the bottom of upper plastic body 1, a terminal assembly to be welded is obtained, bearing part 12 is arranged at the top of lower plastic body 2, and thus a space gap exists between upper plastic body 1 and lower plastic body 2, and the injection molding machine is convenient to inject molten plastic into the space gap between upper plastic body 1 and lower plastic body 2, so that plastic welding is performed on upper plastic body 1 and lower plastic body 2.

S5, put the terminal subassembly into injection mold, the injection molding machine carries out the plastic welding between last plastic body 1 and lower plastic body 2, to PIN contact PIN 3 and first fixed orifices 11, carry out the plastic welding between second fixed orifices 21, thereby form shell 4 at last plastic body 1 and the plastic body 2 outside down, shell 4 and last plastic body 1, plastic body 2 is connected as an organic wholely down, specifically speaking, because the aperture size of first fixed orifices 11 and second fixed orifices 21 generally can be a little bigger than the appearance size of PIN contact PIN 3, be convenient for insert PIN contact PIN 3 in first fixed orifices 11 and the second fixed orifices 21 in the PIN process, consequently, injection molding machine injection molding' S shell 4 not only can carry out the injection molding connection to last plastic body 1 and lower plastic body 2, still can carry out the injection molding to first fixed orifices 11 and PIN contact PIN 3, the gap between second fixed orifices 21 and the PIN contact PIN 3 carries out the injection molding sealing, thereby improve the inside sealed condition of terminal subassembly, and then avoid outside steam or impurity to get into the inside of connector short circuit or high pressure contact PIN, and then influence the product performance. In addition, the number of the terminal assemblies is preferably 2, the two terminal assemblies are arranged in a mold, then injection molding and fixing are carried out on the two terminal assemblies by using an injection molding machine, a shell 4 obtained by injection molding is arranged on the outer sides of the two terminal assemblies, and a baffle 6 positioned between PIN PINs 3 of the two terminal assemblies is arranged at the bottom of the shell 4. Shell 4 forms ascending holding tank 5 of opening with the top of last plastic body 1, and holding tank 5 mainly is convenient for outside cable or other connection structure and PIN contact PIN 3 and carries out welded fastening or be connected fixedly, connects fixed back, can further carry out injection moulding to sealed in the holding tank 5, consequently as preferred, the top of going up plastic body 1 is provided with a plurality of supporting parts 14 that are located in holding tank 5, fixes a position when being convenient for exterior structure and the installation of PIN contact PIN 3. The outside of the housing 4 is injection molded with a hook 41 for facilitating the fixing of the connector of the technical scheme when being connected with external connection equipment. In addition, the outer wall of the housing 4 is preferably provided with a plurality of heat dissipation holes 42.

S7, bending the PIN 3 of the molded product by 90 degrees. In the circuit board design requirement, PIN contact PIN 3 must be buckled into the hole, consequently can design the tool of buckling with PIN contact PIN 3 according to customer's actual need, with PIN contact PIN 3 bending to suitable length and angle.

In conclusion, because the PIN 3 is generally plated with copper on the surface, the connectivity of the PIN 3 is improved, but the copper is soft, the PIN 3 is conventionally required to be inserted into an injection mold first, and then the injection mold is subjected to injection molding by an injection molding machine, and the injection mold is generally a steel mold, so that the copper on the surface of the PIN 3 is easily scratched or abraded in the PIN inserting process, and the situation of poor contact is easily caused. This technical scheme goes up plastic body 1 and down plastic body 2 and is injection moulding, and consequently the texture is soft, inserts PIN contact PIN 3 and goes up plastic body 1's first fixed orifices 11 and down plastic body 2 in the second fixed orifices 21, all can not wear and tear or scratch to PIN contact PIN 3 surface, can further improve PIN contact PIN 3's conductivity and the stability that switches on. In addition, conventionally, the PIN contact PIN 3 is generally subjected to injection molding to form an inner film, then an injection mold is replaced, an outer film is subjected to injection molding on the outer side of the inner film, two times of injection molding are needed, and the injection molding time is long; according to the technical scheme, the upper plastic body 1 and the lower plastic body 2 of the terminal assembly are subjected to plastic welding only by one-time injection molding, so that the production efficiency is improved by more than ten times compared with the existing production method, and the reject ratio is low.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. An injection molding method of a module assembling type connector is characterized by comprising the following steps:

s1, firstly, an upper plastic body (1) is formed by injection molding through a mold, and a plurality of first fixing holes (11) for fixing PIN PINs (3) are arranged on the upper plastic body (1);

s2, using a mold to perform injection molding on the lower plastic body (2), wherein a plurality of second fixing holes (21) for fixing the PIN PINs (3) are arranged on the lower plastic body (2);

s3, inserting the PIN (3) into the first fixing hole (11) of the upper plastic body (1), and pre-positioning the PIN (3);

s4, aligning the lower plastic body (2) with the upper plastic body (1) so as to enable the second fixing hole (21) and the first fixing hole (11) to be aligned in the vertical direction, sleeving the second fixing hole (21) from the bottom of the PIN PIN (3), fixing the lower plastic body (2) at the bottom of the upper plastic body (1), and obtaining a terminal assembly to be welded at the moment;

s5, placing the terminal assembly into an injection mold, carrying out plastic welding between the upper plastic body (1) and the lower plastic body (2) by the injection molding machine, carrying out plastic welding between the PIN (PIN) PIN (3) and the first fixing hole (11) and the second fixing hole (21), forming a shell (4) outside the upper plastic body (1) and the lower plastic body (2), connecting the shell (4) with the upper plastic body (1) and the lower plastic body (2) into a whole,

2. The injection molding method of modular assembly connector according to claim 1, wherein the housing (4) of the product in step S6 forms a receiving groove (5) with an upward opening with the top of the upper plastic body (1).

3. The injection molding method of modular connector assembly according to claim 1, wherein the PIN (3) is provided with the abutting fixing portion (31), and in the step S3, the PIN (3) is inserted into the first fixing hole (11), and the abutting fixing portion (31) abuts and is fixed to the bottom/top of the first fixing hole (11) when it is in place.

4. The injection molding method of a modular assembly connector according to claim 1, wherein the bottom of the upper plastic body (1) injection molded in the step S1 is provided with a bearing portion (12), the assembled terminal assembly in the step S4 is a terminal assembly, and the bearing portion (12) of the upper plastic body (1) is arranged on the top of the lower plastic body (2), so that a space gap exists between the upper plastic body (1) and the lower plastic body (2), thereby facilitating the injection molding machine in the step S5 to perform the plastic welding on the upper plastic body (1) and the lower plastic body (2).

5. The injection molding method of a module-assembling type connector according to claim 1, wherein a hook (41) is injection-molded on an outer side of the housing (4).

6. The injection molding method of a modular assembly connector according to claim 1, wherein the number of the terminal assemblies in the step S5 is 2, the 2 terminal assemblies are placed together in a mold, the injection molding machine performs the plastic welding of the 2 terminal assemblies and the injection molding of the 2 terminal assemblies to fix the 2 terminal assemblies together, and the housings (4) are formed at the outer sides of the two terminal assemblies, respectively.

7. A method of injection molding a modular fabricated connector as claimed in claim 6, wherein the bottom of the housing (4) is provided with a baffle (6) between the PIN PINs (3) on the two terminal assemblies.

8. The injection molding method of a module-assembling connector according to claim 6, wherein a plurality of heat-radiating holes (42) are provided on the outer wall of the housing (4).

9. The injection molding method of modular assembly type connector according to claim 1, further comprising S7 bending the PIN (3) of the molded product by 90 °.