A faucet plastic waterway integrated structure and its forming mold and forming method

Abstract

A faucet plastic waterway integrated structure and its molding mold and molding method, utilizing its rational design to enable the main body inner core to obtain four-way fixing forces in the complete mold cavity of the molding mold, so that the main body inner core is stably clamped under the upper and lower sliders and will not fall, and will not produce any deviation in the complete mold cavity, so that the molding result can be achieved completely in accordance with the established form, and because the main body inner core no longer needs to be provided with the positioning structure, limiting structure, positioning convex particles and other structures mentioned in the background technology, the waterway is completely laid only in the main body inner core and the secondary injection molding layer, so no leakage occurs.

Description

Technical Field

[0001] This invention relates to the field of sanitary ware, and in particular to an integrated plastic water channel structure for a faucet, its molding die, and molding method. Background Technology

[0002] As shown in Figure 1-2, existing copper-clad plastic secondary injection molded faucets generally have multiple positioning and limiting structures on their internal main core 1', mainly including side wall positioning protrusions 11'. To allow the main core 1' (water channel core) to be placed into the molding cavity of the rear mold core, these positioning protrusions 11' can engage with corresponding positioning recesses on the molding cavity of the rear mold core, enabling initial positioning within the molding cavity by using the positioning protrusions 11' when the main core 1' is placed in the mold. A water outlet 12' is located above the main core 1', and this water outlet 12' is generally a columnar protrusion extending from the upper surface of the main core 1'. During the secondary plastic coating process of core 1', the columnar outlet of the secondary plastic coating layer 2' is flush with the plastic coating layer after the secondary plastic coating, ensuring a smooth outer contour of the structure after molding. The main core is also provided with positioning protrusions 13' below. When the main core 1' is placed into the molding cavity, the positioning protrusions 13' are positioned at the bottom of the molding cavity of the rear mold core, so that the main core 1' can be placed in a balanced position in the molding cavity. When the mold is closed and secondary glue is applied, the positioning and limiting structure design on the side wall, top, and bottom of the main core 1' allows the main core 1' to achieve a smooth product shape during the secondary plastic coating.

[0003] However, this process also has the following drawbacks. Firstly, since the main core is manually inserted into the molding cavity of the mold, workers may make mistakes and fail to align the positioning protrusions 11' with the positioning recesses on the molding cavity. During the secondary injection molding, if the positioning protrusions 11' and the positioning recesses are not properly inserted, the position of the main core 1' will be offset, which may result in a gap between the main core 1' and the secondary plastic coating layer 2'. Secondly, if the mold temperature or the temperature of the plastic material is insufficient, the molded secondary plastic coating layer 2' may not be completely adhered to the surface of the main core 1', resulting in gaps. In this case, because there are gaps between the main core and the secondary plastic coating layer 2', if water leaks at the joint after secondary injection molding, it can easily seep into the gaps between the main core 1' and the secondary plastic coating layer 2', and then further seep out of the secondary plastic coating layer 2' from the side wall and the positioning protrusions (11', 13') below, causing water leakage during product use.

[0004] Therefore, to avoid this technical problem, we have eliminated any possible exposed interfaces between the main body core 1' and the secondary plastic coating layer 2' to prevent water leakage. Summary of the Invention

[0005] The purpose of this invention is to provide a simple, seamless, and leak-proof integrated plastic water channel structure for faucets with an external secondary injection molding layer.

[0006] Another objective of this invention is to provide a mold and molding method for an integrated plastic waterway structure for faucets that provides a stable fit and high stability for the internal molded products.

[0007] To achieve the above objectives, the solution of the present invention is as follows: an integrated plastic water channel structure for a faucet, comprising a main inner core, a secondary injection molding layer, and copper pipe feet on both sides, characterized in that: the main inner core is a central through pipe, the cuts on both sides of the main inner core are inwardly arc-shaped cuts, and a through hole is provided in the middle of the main inner core; the secondary injection molding layer covers the outside of the main inner core, and forms two valve core receiving cavities connected to the main inner core and a central water pipe connected to the two valve core receiving cavities respectively at the arc-shaped cuts on both sides of the main inner core; the two central water pipes are respectively secondary injection molded in the copper pipe feet on both sides; the secondary injection molding layer further forms an upper water outlet and a lower water outlet on the vertical through hole in the middle of the main inner core.

[0008] Furthermore, the outer walls of the copper tube feet on both sides are provided with external threads.

[0009] Furthermore, the copper pins on both sides have several positioning holes at their top ends, and the secondary injection molding layer is also formed within these positioning holes.

[0010] Furthermore, the copper tubes on both sides have a feed notch at their top.

[0011] Furthermore, the through hole that runs vertically through the middle has internal threads on its inner wall facing upwards.

[0012] Furthermore, the secondary injection molding layer has external threads on the outer wall of the upper outlet and internal threads on the inner wall of the lower outlet.

[0013] A faucet plastic water channel integrated molding die includes a moving module and a fixed template. The moving module can move back and forth relative to the fixed template. The moving module is formed by the moving template, which has a pre-set rear mold cavity according to the desired injection molded product shape facing the fixed template. The moving template also has an upper slider and a lower slider, which are controlled by their respective hydraulic cylinders to move up and down on one side of the rear mold cavity. The bottom of the upper slider has left and right valve cores and a middle upper water outlet core corresponding to the desired injection molded product shape; the upper part of the lower slider has left and right water channel cores and a middle lower water outlet core corresponding to the desired injection molded product shape. The fixed template has a pre-set front mold cavity according to the desired injection molded product shape facing the moving template. When the moving module moves forward until the moving template is close to the fixed template, the rear mold cavity of the moving template and the front mold cavity of the fixed template combine to form a complete mold cavity. The complete mold cavity is consistent with the shape of the product to be injection molded, and the main body core and left and right copper pipe feet are pre-set within the complete mold cavity.

[0014] Furthermore, the moving mold assembly is composed of a moving mold plate, a moving mold pad, and a moving mold base plate in sequence. The moving mold base plate, facing the moving mold plate, has a movable ejector base plate and ejector plate. A set of ejector pins are vertically fixed to the ejector plate and abut against the ejector base plate, with the front ends of the ejector pins passing through the moving mold pad and the moving mold plate, located in the rear mold cavity. The ejector pins can move back and forth with the movement of the ejector base plate. The moving mold pad is vertically fixed with guide pillars facing the moving mold plate. The front ends of the guide pillars pass through the periphery of the moving mold plate, and the guide pillars can move back and forth with the movement of the moving mold pad. The fixed mold plate also has guide pillar insertion holes around its periphery. When the moving mold plate moves forward close to the fixed mold plate, the guide pillars on the moving mold pad pass through the periphery of the moving mold plate and are further inserted into the guide pillar insertion holes around the periphery of the fixed mold plate. The rear mold cavity of the moving mold plate and the front mold cavity of the fixed mold plate combine to form a complete mold cavity.

[0015] Furthermore, a mold pull plate is provided between the moving mold plate and the fixed mold plate, and a limiting groove is provided on the mold pull plate, so that the moving mold plate can move back and forth along the limiting groove on the mold pull plate towards the fixed mold plate.

[0016] A method for molding an integrated plastic water pipe structure for a faucet, characterized in that:

[0017] Step 1: First, move the moving mold assembly away from the moving mold platen. The moving mold base plate and the moving mold pad plate are pulled back. The ejector base plate 5 and the ejector plate on the moving mold base plate move back together with the moving mold base plate. The guide pillars on the moving mold pad plate also move back together with the moving mold pad plate. The upper slider of the moving mold platen slides upward and the lower slider slides downward, so that the rear mold cavity on the moving mold platen is opened.

[0018] Step 2: Insert the left and right copper pipe feet into the left and right water channel cores of the lower slider respectively; insert the vertical through hole in the middle of the main body core with the middle water outlet core below the upper slider with the middle vertical through hole facing upward. The cuts on both sides of the main body core are inward arc-shaped cuts that fit tightly into the inner side wall of the left and right valve cores below the upper slider, so that the main body core is stably set below the upper slider and will not fall off.

[0019] Step 3: The cylinders of the upper and lower sliders are reset, causing the upper slider to push downward and the lower slider to push upward. This causes the left and right valve cores of the upper slider to move downward and approach the upper ends of the left and right copper pipe feet to form the forming cavity of the central water pipe; the middle lower water outlet core on the lower slider is inserted into the lower end of the through hole of the main body core and fits tightly.

[0020] Step 4: Push the moving template inward so that the moving template and the fixed template are clamped together to form a complete mold cavity. The main body core and the left and right copper tubes are pre-set inside the complete mold cavity.

[0021] Step 5: Perform a second injection molding layer. After injection molding, the faucet and plastic water channel integrated structure is obtained.

[0022] Furthermore, in step four above, by pushing the moving mold pad towards the moving mold plate, the front end of the guide column of the moving mold pad passes through the periphery of the moving mold plate and is further inserted into the guide column insertion holes around the periphery of the fixed mold plate, so that the moving mold plate and the fixed mold plate are positioned and clamped.

[0023] Furthermore, in step four above, the moving template moves along the limiting groove on the mold pull plate toward the fixed template and clamps with the fixed template.

[0024] Furthermore, in step five, after injection molding, the moving template and the fixed template are separated by a certain distance. The oil cylinder is controlled to move the upper slider upward to extract the left and right valve cores and the middle upper water outlet core, and the lower slider moves downward to extract the left and right water channel cores and the middle lower water outlet core, thus realizing core extraction.

[0025] Furthermore, after core pulling, the moving mold plate and the fixed mold plate are completely separated. The ejector base plate and ejector plate of the moving mold base plate are pushed towards the moving mold plate, so that the front of the ejector pin passes through the moving mold pad plate and the moving mold plate, thereby ejecting the molded faucet plastic water channel integrated structure out of the mold and completing the product collection.

[0026] With the above-mentioned design, due to its reasonable structural design, the main body core is able to be tightly inserted into the middle upper water outlet core below the upper slider with its central vertical through hole facing upwards. Furthermore, the inward-facing arc-shaped cuts on both sides of the main body core precisely fit into the inner walls of the left and right valve cores below the upper slider. The main body core is thus clamped by the left and right valve cores, and its tight insertion with the middle upper water outlet core eliminates the need for the positioning structure, limiting structure, and positioning protrusions mentioned in the background technology. After the upper and lower sliders are clamped, the middle lower water outlet core of the lower slider is inserted into the lower part of the main body core. The lower water outlet further secures the main body core within the complete mold cavity. Even during secondary injection molding, where the secondary injection plastic exerts a significant impact, the four-way fixation ensures the main body core remains stably clamped below the upper and lower sliders without falling off and without any displacement within the complete mold cavity. This allows the molding result to be achieved exactly as intended. Furthermore, since the main body core no longer requires the positioning structures, limiting structures, or positioning protrusions mentioned in the background technology, the water channels are laid entirely within the main body core and the secondary injection layer, thus eliminating leakage. Attached Figure Description

[0027] Figure 1 This is a background technology illustration. Figure 1 ;

[0028] Figure 2 This is a background technology illustration. Figure 2 ;

[0029] Figure 3 This is an exploded view of an embodiment of the present invention;

[0030] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 1 and process steps Figure 1 ;

[0032] Figure 6 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 2 and process steps Figure 2 ;

[0033] Figure 7 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 3 and process steps Figure 3 ;

[0034] Figure 8 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 4 and process steps Figure 4 ;

[0035] Figure 9 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 5 and process steps Figure 5 ;

[0036] Figure 10 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 6 and process steps Figure 6 ;

[0037] Figure 11 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 7 and process steps Figure 7 ;

[0038] Figure 12 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 8 and process steps Figure 8 ;

[0039] Figure 13 This is a schematic diagram of the mold structure according to an embodiment of the present invention. Figure 9 and process steps Figure 9 ;

[0040] Figure 14 This is an exploded view of an embodiment of the present invention;

[0041] Figure 15 This is a schematic cross-sectional view of an embodiment of the present invention;

[0042] Figure 16 This is a schematic diagram of the assembly and use of an embodiment of the present invention. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0044] Example:

[0045] like Figure 3-4As shown, a faucet with an integrated plastic water channel structure includes a main inner core 1, a secondary injection molding layer 2, and copper pipe feet 3 on both sides. The main inner core 1 is a central through-tube with inwardly curved cuts 12 on both sides and a through hole 13 vertically penetrating the main inner core 1 in the middle. The secondary injection molding layer 2 covers the main inner core 1 and forms two valve core receiving cavities 21 communicating with the main inner core 1 at the curved cuts 12 on both sides of the main inner core 1, and connects to the two valve core receiving cavities 21 respectively. Two central water pipes 211 are respectively injection molded into the copper pipe feet 3 on both sides. The secondary injection molding layer 2 further forms an upper outlet 22 and a lower outlet 23 on the vertical through hole 13 in the middle of the main body core 1. The upper outlet 22 is higher than the upper end of the through hole 13, and the lower outlet 23 protrudes downward from the lower end of the through hole 13. The secondary injection molding layer 2 covers the entire main body core 1, so that the entire water circuit is embedded in the secondary injection molding layer 2, ensuring the water circuit's airtightness. The copper pipe feet 3 on both sides have external threads 31 on their outer walls, and their top ends 33 have several positioning through holes 32 and a feeding notch 34. The secondary injection molding layer 2 is formed and covers the outer ring of the top ends 33 of the copper pipe feet 3 on both sides, such as Figure 4 As shown, it is also filled into the positioning perforation 32, which helps the copper pin 3 to be firmly fixed to the outside of the central water pipe 211.

[0046] The through hole 13 is vertically penetrating in the middle, and its inner wall is provided with internal thread 131 in the upward direction; the secondary injection molding layer 2 has an external thread 221 on the outer wall of the upper water outlet 22 and an internal thread 231 on the inner wall of the lower water outlet 23.

[0047] The valve core receiving cavity 21 formed by the secondary injection molding layer 2 has two valve core positioning notches 212 formed on the upper part of its cavity wall.

[0048] like Figures 5 to 13 As shown, a one-piece mold for a faucet-shaped plastic water channel includes a movable mold assembly 4 and a fixed mold plate 50. The movable mold assembly 4 can move back and forth relative to the fixed mold plate 50. The movable mold assembly 4 is composed of a movable mold plate 41, a movable mold pad 42, and a movable mold base plate 43 in sequence. The movable mold plate 41 has a rear mold cavity 411 preset according to the desired injection molded product shape in the direction facing the fixed mold plate 50. Figure 12 , Figure 13As shown, a moving mold plate 42 and a moving mold base plate 43 are sequentially provided at the rear of the moving mold plate 41. The moving mold base plate 43 is provided with a movable ejector base plate 46 and an ejector plate 47 facing the moving mold plate 41. A set of ejector pins 52 are vertically fixed to the ejector plate 47 and abut against the ejector base plate 46. The front end 521 of the ejector pin 52 passes through the moving mold plate 42 and the moving mold plate 41 and is located at the rear mold cavity 411. The ejector pin 52 can move back and forth with the front and rear movement of the ejector base plate 46. A set of guide pillars 421 are vertically fixed on the moving mold plate 42 facing the moving mold plate 41. The front end 422 of the guide pillars 421 passes through the periphery of the moving mold plate 41. The guide pillars 421 can move back and forth with the front and rear movement of the moving mold plate 42.

[0049] The moving mold plate 41 is also provided with an upper slider 44 and a lower slider 45. The upper slider 44 and the lower slider 45 are controlled by their respective hydraulic cylinders 40 to move up and down on one side of the rear mold cavity 411 of the moving mold plate 41. The bottom of the upper slider 44 is provided with left and right valve cores 441 and a middle upper water outlet core 442 corresponding to the desired injection molded product shape. The upper part of the lower slider 45 is provided with left and right water channel cores 451 and a middle lower water outlet core (not shown in the figure) corresponding to the desired injection molded product shape. The fixed mold plate 50 is provided with a front mold cavity preset according to the desired injection molded product shape in the direction facing the moving mold plate 41. Guide post insertion holes are also provided around its perimeter (not shown in the figure). Four molds are provided between the moving mold plate 41 and the fixed mold plate 50. Pull plates 6 are distributed around the mold. The mold pull plates 6 are provided with limiting slide grooves 61. Screws 401 are fixed around the moving template 41 and the fixed template 50. The screws 401 pass through the limiting slide grooves 61 of the mold pull plates 6. The moving template 41 moves back and forth along the limiting slide grooves 61 on the mold pull plates 6 towards the fixed template 50 using the screws 401. This facilitates the accurate positioning of the moving template 41 and the fixed template 50 and prevents them from shifting. When the moving template 41 moves forward and closes to the fixed template 50, the rear mold cavity 411 of the moving template 41 and the front mold cavity (not shown in the figure) of the fixed template 50 are combined to form a complete mold cavity. The complete mold cavity is consistent with the shape of the product to be injection molded. The main body core 1 and the left and right copper tube feet 3 are preset inside the complete mold cavity.

[0050] A method for molding an integrated plastic water channel structure for a faucet, as detailed below:

[0051] Step 1: As Figure 5 As shown, the moving module 4 is first moved away from the moving mold plate 41, wherein the moving mold base plate 43 and the moving mold pad plate 42 are both pulled back, and the ejector base plate 46 and ejector plate 47 on the moving mold base plate 43 move back together with the moving mold base plate 43; the guide pillar 421 on the moving mold pad plate 42 also moves back with the moving mold pad plate 42; wherein the upper slider 44 of the moving mold plate 41 slides upward and the lower slider 45 slides downward, so that the rear mold cavity 411 on the moving mold plate 41 is opened;

[0052] Step Two: As Figure 5 As shown, the left and right copper pipe feet 3 are respectively inserted into the left and right water channel cores 451 of the lower slider 45; the vertical through hole 13 in the middle of the main body core 1 is tightly inserted into the middle upper water outlet core 442 below the upper slider 44 with the upper vertical through hole 13 facing upward. The two sides of the main body core 1 have inward arc-shaped cuts 12 that are tightly fitted into the inner side wall of the left and right valve core cores 441 below the upper slider, so that the main body core 1 is stably set below the upper slider and will not fall off.

[0053] Step 3: As Figure 6 As shown, the upper and lower cylinders 40 are reset, causing the upper slider 44 to be pushed downward and the lower slider 45 to be pushed upward, causing the left and right valve cores 441 of the upper slider 44 to move downward and approach the upper ends of the left and right copper pipe feet 3 to form the molding cavity of the central water pipe 211, which is beneficial to the formation of the central water pipe 211 during subsequent secondary injection molding; the middle lower water outlet core on the lower slider 45 is inserted into the lower end of the through hole 13 of the inner core 1 of the main body and fits tightly.

[0054] Step Four: As Figure 7 , Figure 8 As shown, the mold pushes the moving mold pad 42 towards the moving mold plate 41. The moving mold plate 41 moves towards the fixed mold plate 50 along the limiting slide groove 61 on the mold pull plate 6 using screws 401 and clamps with the fixed mold plate 50. At the same time, the guide post 421 of the moving mold pad 42 passes through the periphery of the moving mold plate 41 and is further inserted into the guide post insertion holes on the periphery of the fixed mold plate 50, so that the moving mold plate 41 and the fixed mold plate 50 are positioned and clamped. The moving mold plate 41 and the fixed mold plate 50 are clamped to form a complete mold cavity. The complete mold cavity is consistent with the shape of the product to be injection molded. The main body core 1 and the left and right copper tube feet 3 are preset inside the complete mold cavity.

[0055] Step 5: As Figure 8 As shown, thermoplastic is injected and stamped to form a secondary injection molding layer 2;

[0056] Step Six: After injection molding, as shown Figure 9 As shown, the moving template 41 is separated from the fixed template 50 by a certain distance. The hydraulic cylinder 40 is controlled to move the upper slider 44 upward to extract the left and right valve cores 441 and the middle upper water outlet core 442; the lower slider 45 moves downward to extract the left and right water channel cores 451 and the middle lower water outlet core, thus achieving core extraction. Figure 10 As shown.

[0057] Step 7: After removing the core, as follows Figure 11 As shown, completely separate the moving mold plate 41 and the fixed mold plate 50, and push the ejector base plate 46 and ejector plate 47 of the moving mold base plate 43 towards the moving mold plate 41, as shown. Figure 12As shown, the ejector pin tip 521 passes through the moving mold pad 42 and the moving mold plate 41, thereby ejecting the molded faucet plastic water channel integrated structure from the mold, completing product collection, thus obtaining the faucet plastic water channel integrated structure. Finally, the mold is reset, as shown. Figure 13 As shown.

[0058] Because the inner core 1 of the main body is tightly inserted into the middle upper water outlet core 442 below the upper slider 44 with its central vertical through hole 13 facing upward, and the inward arc-shaped cuts 12 on both sides of the inner core 1 are tightly fitted into the inner walls of the left and right valve cores 441 below the upper slider, the inner core 1 of the main body is clamped by the left and right valve cores 441 and tightly inserted into the middle upper water outlet core 442. Therefore, the inner core 1 of the main body no longer needs to be equipped with the positioning structure, limiting structure, positioning protrusion and other structures mentioned in the background art. After the upper and lower sliders are clamped, the middle lower water outlet core of the lower slider is inserted into the lower part of the inner core 1 of the main body. The square lower water outlet further fixes the main body core 1 within the complete mold cavity. Even during the secondary injection molding process, where the secondary injection plastic exerts a significant impact, the four-sided fixation ensures that the main body core 1 is stably clamped below the upper and lower sliders and will not fall off. It also prevents any displacement within the complete mold cavity, allowing the molding result to be achieved exactly as intended. Furthermore, since the main body core 1 no longer needs to have the positioning structure, limiting structure, positioning protrusions, or other structures mentioned in the background art, the water channels are entirely within the main body core 1 and the secondary injection layer 2, thus eliminating leakage.

[0059] like Figures 14 to 16 As shown, the valve core 7 is placed into the valve core receiving cavities 21 on both sides of the manufactured faucet plastic water channel integrated structure. The positioning blocks 72 on both sides of the valve core 7 engage with the valve core positioning notches 212 of the valve core receiving cavity 21. The valve core is further pressed into the valve core receiving cavity 21 by the valve core cover 74, so that the water inlet 71 of the valve core 7 faces the inner cavity of the corresponding connected central water pipe 211, and the water outlet 73 of the valve core 7 faces the arc-shaped cutout 12 of the inner core 1 of the main body. A switching valve 8 is placed in the through hole 13 and sealed. The upper outlet 22 has an external thread 221 on its outer wall that is screwed into the through hole 13, facing upwards. A faucet (not shown in the figure) is screwed into the external thread 221 on the outer wall of the upper outlet 22. An internal thread 231 on the inner wall of the lower outlet 23 is screwed into a quick connector 9 for connecting a spray gun (not shown in the figure). Cold and hot water enter through the two side water pipes 211 respectively. The valve cores 7 on both sides control the flow rate of cold and hot water. The intermediate switching valve 8 controls the direction of the mixed water flow (water flows upwards through the faucet or downwards through the spray gun). The resulting integrated faucet body has a tight structure, with the water passage sealed within the secondary injection molding layer 2, eliminating any risk of leakage. Therefore, the production yield is high, greatly increasing production capacity, and the service life is long, reducing user costs.

[0060] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0062] The above description is merely an embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A faucet plastic waterway integrated structure forming mold, comprising a movable mold set and a fixed mold set, wherein the movable mold set can move forward and backward relative to the fixed mold set, and is characterized in that: The integrated structure of the faucet plastic waterway comprises a main body core, a secondary injection molding layer, and copper pins on both sides, wherein the main body core is a central through tube, the incisions on both sides of the main body core present inward arc-shaped incisions, and a through hole vertically penetrating the main body core is provided in the middle; the secondary injection molding layer is coated on the outside of the main body core, and two valve core accommodating cavities connected to the main body core and central through water pipes respectively connected to the two valve core accommodating cavities are formed at the arc-shaped incisions on both sides of the main body core, the two central through water pipes are respectively secondary injection molded in the copper pins on both sides, and the secondary injection molding layer further forms an upper water outlet and a lower water outlet on the vertically penetrating through hole in the middle of the main body core, the upper water outlet is higher than the upper end of the through hole, and the lower water outlet protrudes downward from the lower end of the through hole; wherein the movable mold assembly is formed by a movable mold plate, and the direction of the movable mold plate toward the fixed mold plate A rear mold cavity preset according to the desired injection molded product form is provided, and an upper slider and a lower slider are also provided on the movable mold plate. The upper slider and the lower slider are respectively controlled by their own oil cylinders and can move up and down on one side of the rear mold cavity of the movable mold plate, wherein the bottom of the upper slider is provided with left and right valve cores and a middle upper water outlet core corresponding to the desired injection molded product form; the upper part of the lower slider is provided with left and right water channel cores and a middle lower water outlet core corresponding to the desired injection molded product form; the fixed mold plate is provided with a front mold cavity preset according to the desired injection molded product form in the direction toward the movable mold plate, when the movable mold group moves forward until the movable mold plate is close to the fixed mold plate, the rear mold cavity of the movable mold plate and the front mold cavity of the fixed mold plate are combined to form a complete mold cavity, and the complete mold cavity is consistent with the product form to be injection molded, and the main body inner core and the left and right copper tube pins are preset in the complete mold cavity.

2. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: The outer walls of the copper pins on both sides are provided with external threads.

3. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: The tops of the copper pins on both sides are provided with a plurality of positioning holes, and the secondary injection molding layer is also formed in the positioning holes.

4. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: The top ends of the copper pins on both sides are provided with feeding notches.

5. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: The through hole vertically penetrates the middle, and an inner wall thereof facing upward is provided with an internal thread.

6. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: The secondary injection layer has an outer wall of an upper water outlet provided with an outer thread, and an inner wall of a lower water outlet provided with an inner thread.

7. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: The movable mold group is composed of a movable mold plate, a movable mold pad and a movable mold bottom plate in sequence; wherein the movable mold bottom plate is provided with an ejector bottom plate and an ejector plate that can move forward and backward in the direction of the movable mold plate, a group of ejectors is vertically fixed to the ejector plate and abuts against the ejector bottom plate, and the front needle heads of the ejectors pass through the movable mold pad and the movable mold plate, and are located at the rear mold cavity position, and the ejectors can move forward and backward with the forward and backward movement of the ejector bottom plate; a guide column is vertically fixed to the movable mold pad in the direction of the movable mold plate, and the front end of the guide column passes through the periphery of the movable mold plate, and the guide column can move forward and backward with the forward and backward movement of the movable mold pad; guide column insertion holes are also provided around the periphery of the fixed mold plate, and when the movable mold plate is pressed forward against the fixed mold plate, the guide columns on the movable mold pad pass through the periphery of the movable mold plate and are further inserted into the guide column insertion holes around the periphery of the fixed mold plate, and the rear mold cavity of the movable mold plate and the front mold cavity of the fixed mold plate are combined to form a complete mold cavity.

8. The faucet plastic waterway integrated structure forming mold according to claim 1, characterized in that: A mold pull plate is provided between the movable mold plate and the fixed mold plate, and a limiting slide groove is provided on the mold pull plate. The movable mold plate can move forward and backward along the limiting slide groove on the mold pull plate toward the fixed mold plate.

9. A method for molding a faucet plastic waterway integrated structure, characterized in that: The faucet plastic waterway integrated structure forming mold according to claim 1 is specifically: Step 1: First, move the movable mold assembly away from the movable mold plate, wherein the movable mold bottom plate and the movable mold pad are pulled back, and the ejector bottom plate and the ejector plate on the movable mold bottom plate move back together with the movable mold bottom plate; the guide pillar on the movable mold pad also moves back with the movable mold pad; wherein the upper slider of the movable mold plate slides upward, and the lower slider slides downward, so that the rear mold cavity on the movable mold plate is opened; Step 2: Insert the left and right copper pins into the left and right water channel cores of the lower slider respectively; insert the middle vertical through hole of the main body inner core upward into the middle upper water outlet core below the upper slider, and the incisions on both sides of the main body inner core present inward arc-shaped incisions that fit tightly with the inner side walls of the left and right valve core cores below the upper slider, so that the main body inner core is stably set below the upper slider and will not fall off; Step 3: The oil cylinders of the upper and lower sliders are reset, so that the upper slider is pushed downward, and the lower slider is pushed upward at the same time, so that the left and right valve cores of the upper slider are moved downward close to the upper ends of the left and right copper pins to form a forming cavity for the middle water pipe; the middle lower water outlet core on the lower slider is inserted into the lower end of the through hole of the main body inner core and fits tightly; Step 4: Push the movable mold plate inwards so that the movable mold plate and the fixed mold plate are clamped to form a complete mold cavity, and the main body core and the left and right copper pins are preset in the complete mold cavity; Step 5: Injection molding the secondary injection molding layer, and after injection molding, the faucet plastic waterway integrated structure is obtained.

10. The method for forming a faucet plastic waterway integrated structure as claimed in claim 9, characterized in that: In the above step four, the movable mold pad is pushed toward the movable mold plate so that the front end of the guide column of the movable mold pad passes through the periphery of the movable mold plate and is further inserted into the guide column sockets around the periphery of the fixed mold plate, so that the movable mold plate and the fixed mold plate are positioned and clamped.

11. The method for forming a faucet plastic waterway integrated structure as claimed in claim 9, characterized in that: In the above step 4, the movable template moves along the limiting slide groove on the mold pull plate toward the fixed template and is clamped with the fixed template.

12. The method for forming a faucet plastic waterway integrated structure as claimed in claim 9, characterized in that: In the step five, after injection molding, the movable template is separated from the fixed template by a distance, and the oil cylinder is controlled to move the upper slider upward to extract the left and right valve cores and the middle upper water outlet core, and the lower slider moves downward to extract the left and right water channel cores and the middle lower water outlet core, thereby realizing core pulling.

13. The method for forming a faucet plastic waterway integrated structure as claimed in claim 12, characterized in that: After core pulling, completely separate the movable mold plate and the fixed mold plate, push the ejector base plate and ejector plate of the movable mold base plate toward the movable mold plate, so that the front pin head of the ejector passes through the movable mold pad and the movable mold plate, and then eject the formed faucet plastic waterway integrated structure to make it separate from the mold, completing product collection.

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