A charging wire inner and outer integrated forming method

Abstract

A charging wire inner and outer integrated forming method, which comprises the following steps: step one, providing a forming die, the forming die comprises an upper die, a lower die and a positioning piece, the lower die is provided with a lower outer forming cavity and a lower inner forming cavity, the top surface of the lower die is provided with a limiting groove, and the positioning piece is embedded in the limiting groove, and the inner side surface of the positioning piece is provided with a positioning slot; step two, inserting a welding wire into the positioning slot on one side of the positioning piece to form an inner layer; step three, taking out the positioning piece, inserting a welding wire into the positioning slot on the other side of the positioning piece, and turning over to insert into the mold; step four, taking out the positioning piece, taking out the finished product, inserting a welding wire again, and then performing injection molding, and the cycle is repeated. The inner layer forming die and the outer layer forming die are integrated on the same die, the inner layer and the outer layer of the product can be formed at one time on the same equipment, the labor cost and the material transfer time are reduced, the production efficiency is greatly improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of injection mold, especially to a charging wire inner and outer integrated forming method. BACKGROUND

[0002] With the continuous improvement of the international status of China's manufacturing industry, the mold industry has developed rapidly, and the demand for molds has increased exponentially. The production cycle of molds is getting shorter and shorter. Mold production is evolving from multi-variety small-batch production to single-piece production to diversification of varieties, diversification of production processes, and complex production capacity. Injection molds are generally suitable for hot forming of thermoplastic plastics. Using the principle of hot melting of thermoplastic plastics, melt the plastic, inject it into the mold cavity through the injection molding machine, then cool and set, open the mold and take out the plastic product.

[0003] The function of the mobile phone data line and the computer data line is to connect mobile devices and computers to achieve data transmission or charging purposes. Therefore, the precision requirement of the data line connector is very high. In the processing process, the connector and the wire are usually welded first, and then the welding material is placed on the inner layer forming mold to form the inner layer to cover the welding position. Then it is transferred to another outer layer forming mold to form the outer layer on the outside of the inner layer to form the finished product.

[0004] However, this processing method requires two processing equipment\molds, which not only has high equipment cost and requires a large space, but also requires two employees to operate simultaneously, which has high labor cost. After forming the inner layer, the semi-finished product needs to be transferred to another equipment to form the outer layer, which increases the transfer time and requires a special transfer tool. For some small-batch production products, this preparation method has the problems of low production efficiency and high production cost, which is not conducive to the beneficial development of the company. SUMMARY

[0005] Therefore, it is necessary to provide a charging wire inner and outer integrated forming method to solve the problems in the prior art.

[0006] A charging wire inner and outer integrated forming method for forming an inner layer on the outside of the product and an outer layer on the outside of the inner layer, comprising the following steps:

[0007] Step one: provide a molding die, the molding die includes an upper die, a lower die and a positioning piece, the positioning piece is detachably installed on the lower die, the upper die covers the lower die and the positioning piece; the lower die is provided with a lower side outer molding cavity and a lower side inner molding cavity, the lower side outer molding cavity and the lower side inner molding cavity are arranged side by side, and are located on the same side of the positioning piece, and the arrangement direction is consistent with the extension direction of the positioning piece; the lower side inner molding cavity forms the inner layer, and the lower side outer molding cavity forms the outer layer outside the inner layer; the upper die is provided with an upper side inner molding cavity and an upper side outer molding cavity corresponding to the lower side inner molding cavity and the lower side outer molding cavity; the top surface of the lower die is provided with a limiting groove, the lower part of the positioning piece is embedded in the limiting groove, and the upper part is embedded in the bottom surface of the upper die, and the positioning piece is provided with a positioning groove on the inner side surface corresponding to the molding cavity;

[0008] Step two, molding the inner layer; the welding wire is inserted into the positioning groove on one side area of the positioning piece, then the positioning piece is inserted into the limiting groove of the mold, and the welding wire is embedded into the lower side inner molding cavity; the mold is closed for injection molding to form a semi-finished product with the required inner layer;

[0009] Step three, molding the outer layer; after the inner layer is molded, the mold is opened, the positioning piece is taken out, a new welding wire is inserted into the other side empty positioning groove, then the positioning piece is turned over at both ends and inserted into the limiting groove of the mold, so that the semi-finished product corresponds to the outer side outer molding cavity, and the new welding wire corresponds to the lower side inner molding cavity; the semi-finished product and the welding wire are respectively embedded into the outer side outer molding cavity and the inner molding cavity; the mold is closed for injection molding;

[0010] Step four, open the mold, take out the positioning piece from the lower die, take out the finished product with the molded outer layer on the positioning piece, then insert a new welding wire at the position of the finished product after the positioning piece is taken out, turn over the positioning piece at both ends and insert it into the mold, and then injection molding is performed, and the cycle is repeated.

[0011] Further, the lower die is further provided with an insert set, the insert set includes an outer side insert and a middle part insert, the top surface of the lower die plate is provided with an insert wide slot and an insert long slot, the outer side insert is embedded in the insert wide slot, and the middle part insert is embedded in the insert long slot, and the middle part insert is located between the positioning piece and the outer side insert.

[0012] Further, the insert set further includes a first inner insert and a second inner insert, the first inner insert is embedded in the outer side insert, and the lower side inner molding area is further provided with an insert inner slot, the insert inner slot is arranged between the insert long slot and the limiting groove, and the second inner insert is embedded in the insert inner slot.

[0013] Further, the insert wide slot is further provided with a notch part on one side of the lower side inner molding area, and the first inner insert is installed in the notch part.

[0014] Further, the insert set further comprises a first outer insert, and the lower outer forming area is provided with an insert outer groove, which is arranged between the insert wide groove and the insert long groove, and the first outer insert is embedded in the insert outer groove.

[0015] Further, the positioning member has a pentagonal cross section, and the inner side is vertically arranged, and the corresponding outer side is arranged in an outward convex sharp corner shape, which is formed by two inclined surfaces combined into a corner structure.

[0016] Further, the insert wide groove is provided with a positioning hole and a positioning groove in communication, the positioning hole is arranged in the positioning insert, and the positioning groove is arranged in the insert block.

[0017] Further, the upper mold is provided with a glue injection port in the middle and two groups of branch flow channels extending on both sides, and the two groups of branch flow channels correspond to the lower inner forming cavity and the lower outer forming cavity respectively; and the glue injection port is further provided with a main flow channel on one side, and the main flow channel is connected with the two groups of branch flow channels.

[0018] Further, the connection part of the main flow channel and the two branch flow channels is further provided with a separation piece, the top end of the separation piece extends to the outside of the upper mold plate, and a driving device is arranged on the side of the separation piece, and the driving device can drive the separation piece to move up and down.

[0019] Further, a main control device is further included, the separation piece is provided with two, and the two separation pieces are arranged at the connection part of the main flow channel and the left branch flow channel and the connection part of the main flow channel and the right branch flow channel respectively; and the main control device is in signal communication with the driving devices of the separation pieces.

[0020] In summary, the integrated forming method can complete the forming of the inner layer and the outer layer of the product at one time by integrating the inner layer forming mold and the outer layer forming mold on the same mold, without the need for two different molds and the need for equipment conversion; not only the equipment cost and the occupied space are reduced, but also the labor cost and the material conversion time are reduced. The production efficiency is greatly improved, and the production cost is greatly reduced, and the method is especially suitable for the production of small-batch products, has strong practicability, and has strong popularization significance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a processing change diagram of a charging wire;

[0022] Figure 2 It is an exploded structural diagram of the integrated forming method of the charging wire of the application;

[0023] Figure 3 It is Figure 2 It is an exploded diagram of the lower mold;

[0024] Figure 4 It is Figure 2Structure diagram of the upper and middle mold;

[0025] Figure 5 For Figure 1 Structure diagram of the flow channel of the middle mold. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0027] As Figures 1 to 5 shown, it is a charging wire inner and outer integrated forming method provided by the present application, which is used for processing charging wire. It can be understood that in other embodiments, it can also be used for forming other products, which is not limited to processing wire.

[0028] As Figure 1 shown, it is a charging wire processed by the present application, which includes a main connector end 10a and a plurality of wires 20a welded to one side of the main connector 10a, and a plurality of sub connectors 30a welded to the other end of the wire 20a. The plurality of sub connectors 30a can be of the same model or different models, which is not limited herein. The welding position of the main connector end 10a, the sub connector 30a and the wire 20a is sequentially provided with an inner injection inner layer 40a and an injection outer layer 50a from the inside to the outside, and the injection inner layer 40a is wrapped around the connection 31a between the connector and the wire 20a. In this embodiment, the connection 31a includes a welding position and an electric wire extending from the wire 20a and connected to the welding position. The injection outer layer 50a is wrapped around the inner side end part of the injection inner layer 40a, the main connector end 10a and the sub connector 30a.

[0029] The charging wire inner and outer integrated forming method specifically includes the following steps:

[0030] Step one, provide a forming mold, the forming mold includes an upper mold 10, a lower mold 20 and a positioning piece 30, the positioning piece 30 is detachably installed on the lower mold 20, and the upper mold 10 is covered on the lower mold 20 and the positioning piece 30. The lower mold 20 includes a lower mold plate 21, a limiting groove 24 and a lower forming area, and the lower forming area is arranged inside the limiting groove 24. The positioning piece 30 is detachably embedded in the limiting groove 24, and the cross section of the positioning piece 30 is pentagonal, the inner side surface 31 is vertically arranged, and the corresponding outer side surface 32 is outwardly convex and angularly arranged, which is formed by two inclined surfaces to form a corner structure. The design of the shape of the outer side surface 32 facilitates the installation of the positioning piece 30 in the limiting groove 24 and the smooth introduction of the upper mold 10 to cover the lower mold 20.

[0031] The lower forming area includes a lower inner forming area 22 and a lower outer forming area 23 arranged on the top surface of the lower die plate 21. The lower inner forming area 22 and the lower outer forming area 23 are arranged side by side. The lower inner forming area 22 is provided with more than one lower inner forming cavity 221, and the lower outer forming area 23 is provided with more than one lower outer forming cavity 231. In this embodiment, the lower inner forming cavity 221 and the lower inner forming cavity 221 are each provided with two groups, and the lower inner forming cavity 221 and the lower inner forming cavity 221 are arranged on one side, and the extension direction thereof is consistent with the extension direction of the positioning member 30.

[0032] The top surface of the lower die 20 is also provided with a set of inserts on the forming area. The set of inserts includes an outer insert 251, a middle insert 252, a first inner insert 253, a second inner insert 254, a first outer insert 255, a positioning insert 256, and an insert block 257. The top surface of the lower die plate 21 is provided with an insert wide slot 211, an insert long slot 212, an insert outer slot 213, and an insert inner slot 214 on the lower forming area. The insert outer slot 213 is arranged between the insert wide slot 211 and the insert long slot 212, and the insert inner slot 214 is arranged between the insert long slot 212 and the limiting recess 24. The insert wide slot 211 and the insert long slot 212 extend transversely through the lower inner forming area 22 and the lower outer forming area 23. The insert outer slot 213 is arranged in the lower outer forming area 23, and the insert inner slot 214 is arranged in the lower inner forming area 22. The outer insert 251 is fitted into the insert wide slot 211, the middle insert 252 is fitted into the insert long slot 212, the first outer insert 255 is fitted into the insert outer slot 213, and the second inner insert 254 is fitted into the insert outer slot 213. In this embodiment, the insert outer slot 213 is provided with two, and the second inner insert 254 is provided with two corresponding ones.

[0033] The insert wide slot 211 is provided with a plurality of connected positioning holes 215 and positioning slots 216. The positioning insert 256 is arranged in the positioning hole 215, and the positioning insert 256 is arranged in the shape of a " " and provided with an embedded slot in the middle. The insert block 257 is arranged in the positioning slot 216. The width of the embedded slot is consistent with the width of the main joint 10a, and the thickness of the insert block 257 is set according to the thickness of the main joint 10a to be formed below. The positioning insert 256 and the insert block 257 can be replaced according to the shape and size of the product, so that the application range of the mold is wider. In addition, the insert wide slot 211 is also provided with a notch portion on one side of the lower inner forming area 23, and the first inner insert 253 is arranged in the notch portion.

[0034] The top surface of the middle insert 252, the first inner insert 253, the second inner insert 254 and the first outer insert 255 is provided with a clamping groove, the depth of the clamping groove is greater than the thickness of the wire 20a, so that the wire can be well positioned, avoiding the wire from deviating and coming out of the clamping groove, affecting the subsequent forming. In addition, the first inner insert 253 corresponds to the connecting part 31a on one side of the main joint 10a, and the second inner insert 254 corresponds to the connecting part of the sub-joint 30a. The first inner insert 253 and the second inner insert 254, the middle insert 252 are respectively limited to the welding position and the middle part of the wire, so as to facilitate the injection of the inner layer 40a. The first outer insert 255 and the middle insert 252 limit the wire of the semi-finished product to form the injection outer layer 50a.

[0035] The upper die 10 includes an upper die plate 11 and an upper inner forming area and an upper outer forming area provided on the bottom surface of the upper die plate 11. The upper inner forming area is provided with an upper inner forming cavity, and the upper outer forming area is provided with an upper outer forming cavity. The upper outer forming cavity and the lower outer forming cavity are combined to form an outer layer forming cavity, and the upper inner forming cavity and the lower inner forming cavity are combined to form an inner layer forming cavity. The structures of the upper outer forming cavity and the lower outer forming cavity and the upper inner forming cavity and the lower inner forming cavity are basically the same. In addition, the lower outer forming cavity and the lower inner forming cavity are symmetrically arranged in the product structure.

[0036] The upper die 10 is provided with a glue injection port 12 in the middle, and two groups of branch flow channels 13 are extended on both sides, and the two groups of branch flow channels 13 correspond to the inner forming cavity and the outer forming cavity respectively. The glue injection port 12 is also provided with a main flow channel 121 on one side, and the main flow channel 121 connects the two groups of branch flow channels 13. The connection part of the main flow channel 121 and the two branch flow channels 13 is also provided with a separation piece (not shown in the figure), and the top end of the separation piece extends outside the upper die plate 11, and a driving device is arranged on the separation piece. The driving device can drive the separation piece to move up and down. The separation piece is provided with two, which are respectively arranged at the connection part of the main flow channel 121 and the left branch flow channel 13 and the connection part of the main flow channel 121 and the right branch flow channel 13. It is used to separate the left or right flow channel, so that the main flow channel 121 only enters the right branch flow channel 13 or the left branch flow channel 13, so that the mold can work in a single forming area, and the other side forming area has no glue flow.

[0037] The mold is also provided with a master control device, which is provided with three working modes, which can be two-side flow passage normal flow and right-side flow passage flow, right-side flow passage flow. When the inside forming area and the outside forming area both need to work normally, the normal flow mode is started. If only one side needs to flow, the other side does not need glue to enter, the corresponding mode is started. Understandably, different modes are different in length, which can be designed according to the needs of the system, and when switching modes, the data of the feeding time and the holding time are automatically retrieved. The driving device of the separation piece is signal connected with the master control device, when the normal mode is started, the two separation pieces move upward to open the two-side flow passage. When only one side needs to work, the separation piece drives the separation piece on that side to move upward to open the flow passage. When only one inner layer or outer layer needs to be processed (when reworking, repairing, or testing small batches of products), this structure can greatly reduce material waste.

[0038] Step two, form the inner layer, open the upper mold 10 and the lower mold 20, take out the positioning piece 30, insert the sub-joint 30a end of the welded wire product into the positioning groove 216 corresponding to the inner layer forming area 23 of the positioning piece 30; and the positioning groove 216 corresponding to the outer layer forming area 22 is empty. Then insert the positioning piece 30 back into the limiting groove 24, and embed the welded wire, main joint 10a into the second inner insert 254, middle insert 252, first inner insert 253 and positioning insert 256 in turn; after positioning, mold injection to form a semi-finished wire.

[0039] Step three, form the outer layer, after forming the inner layer, open the mold to take out the positioning piece 30, insert the welded wire into the empty positioning groove 216 according to the previous method; then turn over the positioning piece 30, so that the semi-finished product with formed inner layer corresponds to the outer layer forming area side, and the welded wire corresponds to the inner layer forming area side; insert the positioning piece 30 filled with wire into the limiting groove 24. The semi-finished product is embedded into the lower outside forming area 23, and the welded wire is embedded into the lower inside forming area 22; mold injection.

[0040] Step four, after opening the mold, take out the finished product of the lower outside forming area 23, then insert new welded wire; then turn over the positioning piece 30, and place the new wire on the lower inside forming area 22 side; and the semi-finished product is placed on the lower outside forming area 23 side. Cycle accordingly.

[0041] In summary, the integrated forming method of the present application, by integrating the inner layer forming die and the outer layer forming die on the same die, the inner layer and the outer layer of the product can be formed at one time, without two different sets of dies and without changing equipment; not only reduces the equipment cost and the occupied space, but also reduces the labor cost and the material changing time. Greatly improves the production efficiency and reduces the production cost, especially suitable for small batch production. In addition, the positioning member and the insert on the forming die can be disassembled and replaced according to the actual product, so as to improve the application range and the utilization rate of the die, the practicability of the present application is strong, and it has strong popularization significance.

[0042] The above-mentioned embodiment only expresses one embodiment of the present application, which is described in detail, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A method for integrally molding an inner and outer layer of a charging cable, used to form an inner layer on the outer side of the product and an outer layer on the outer side of the inner layer; characterized in that: It comprises the following steps: Step one: provide a molding die, the molding die comprises an upper die, a lower die and a positioning piece, the positioning piece is detachably installed on the lower die, the upper die covers the lower die and the positioning piece; the lower die is provided with a lower side outer forming cavity and a lower side inner forming cavity, the lower side outer forming cavity and the lower side inner forming cavity are arranged side by side, and are located on the same side of the positioning piece, and the arrangement direction is consistent with the extension direction of the positioning piece; the lower side inner forming cavity forms the inner layer, and the lower side outer forming cavity forms the outer layer outside the inner layer; the upper die is provided with an upper side inner forming cavity and an upper side outer forming cavity corresponding to the lower side inner forming cavity and the lower side outer forming cavity; the top surface of the lower die is provided with a limiting groove, the lower part of the positioning piece is embedded in the limiting groove, and the upper part is embedded in the bottom surface of the upper die, and the positioning piece is provided with a positioning groove corresponding to the inner side surface of the forming cavity; Step two, forming the inner layer; the welding wire is inserted into the positioning groove corresponding to the lower side inner forming cavity area of the positioning piece, then the positioning piece is inserted into the limiting groove of the mold, and the welding wire is embedded into the lower side inner forming cavity; the mold is closed and injection molded to form a semi-finished product with the required inner layer; Step three, forming the outer layer; after the inner layer is formed, the mold is opened, the positioning piece is taken out, a new welding wire is inserted into the other side empty positioning groove, then the positioning piece is turned over at both ends and inserted into the limiting groove of the mold, so that the semi-finished product corresponds to the outer side outer forming cavity, and the new welding wire corresponds to the lower side inner forming cavity; the semi-finished product and the welding wire are respectively embedded into the outer side outer forming cavity and the inner forming cavity; the mold is closed and injection molded; Step four, open the mold, take out the positioning piece from the lower die, take out the finished product with the formed outer layer on the positioning piece, then insert a new welding wire at the position after taking out the finished product from the positioning piece, turn over the positioning piece at both ends and insert it into the mold, and injection mold, and the cycle is repeated.

2. The method of integrally molding the inside and outside of a charging wire material according to claim 1, characterized by: The lower die is also provided with an insert set, the insert set comprises an outer insert and a middle insert, the top surface of the lower die plate is provided with an insert wide slot and an insert long slot, the outer insert is embedded in the insert wide slot, and the middle insert is embedded in the insert long slot, and the middle insert is located between the positioning piece and the outer insert.

3. The method of integrally molding the inside and outside of a charging wire material according to claim 2, characterized by: The insert set further comprises a first inner insert and a second inner insert, the first inner insert is embedded in the outer insert, and the lower side inner forming area is further provided with an insert inner slot, the insert inner slot is arranged between the insert long slot and the limiting groove, and the second inner insert is embedded in the insert inner slot.

4. The method of integrally molding the inside and outside of a charging wire material according to claim 3, characterized by: The insert wide slot is further provided with a notch on one side of the lower side inner forming area, and the first inner insert is installed in the notch.

5. The method of integrally molding the inside and outside of a charging wire material according to claim 2, characterized by: The insert set further comprises a first outer insert, the lower side outer forming area is provided with an insert outer slot, the insert outer slot is arranged between the insert wide slot and the insert long slot, and the first outer insert is embedded in the insert outer slot.

6. The method of integrally molding the inside and outside of a charging wire material according to claim 1, characterized by: The cross section of the positioning piece is pentagonal, the inner side surface is vertically arranged, and the corresponding outer side surface is outwardly convex and angular, which is formed by two inclined surfaces to form a corner structure.

7. The method of integrally molding the inside and outside of a charging wire material according to claim 2, characterized by: The insert wide slot is provided with a positioning hole and a positioning groove in communication, the positioning hole is installed in the positioning insert, and the positioning groove is installed in the insert block.

8. The method of integrally forming a charging cord inner and outer according to claim 1, wherein: The upper mold middle part is provided with a glue injection port and two groups of branch runners extended on both sides, and the two groups of branch runners correspond to the lower side inner forming cavity and the lower side outer forming cavity respectively; one side of the glue injection port is further provided with a main runner, and the main runner is connected with the two groups of branch runners.

9. The method of integrally molding the inside and outside of a charging wire material according to claim 8, characterized by: The connection part of the main runner and the two branch runners is further provided with a separation piece, the top end of the separation piece is extended outside the upper mold plate, and a driving device is arranged on the separation piece side, and the driving device can drive the separation piece to move up and down.

10. The method of integrally forming an inner and outer charging cord as defined in claim 9, wherein: Further comprising a main control device, the separation piece is provided with two, and the two separation pieces are arranged at the connection part of the main runner and the left branch runner and the connection part of the main runner and the right branch runner respectively; the main control device is signal connected with the driving device of the separation piece.

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