Flow channel non-blocking pipe fitting mold and forming method thereof

Abstract

A pipe fitting mold with no obstruction in the flow channel and a molding method thereof, comprising a movable mold matched with the fixed mold and a cavity formed between the fixed mold and the movable mold, wherein the cavity is provided with a plurality of core slider assemblies arranged on the cavity corresponding to the characteristics of the product to be produced, and the plurality of core slider assemblies are all arranged on different sides of the movable mold, wherein a core slider assembly arranged on one side of the movable mold includes but is not limited to a main core slider guide rail cooperation action unit, which is used to coordinate with other core slider assemblies to demold the product to be produced after molding; the mold is also provided with a demolding height compensation lifting unit or an optional product falling-off pushing unit; the molding method comprises four steps and is completed; the setting of various related pipe fitting molds of the present invention fully designs the molding inserts to ensure that the various pipe fitting products produced by using the same have no obstruction in the flow channel; the products include but are not limited to straight tee pipe fittings or oblique tee pipe fittings or right-angle elbow pipes.

Description

Technical Field

[0001] The present invention relates to the field of pipe fitting moulds, and in particular to a mould for forming a pipe fitting flow channel, including a forming method thereof; specifically, it also relates to a process in which a pipe fitting produced by the mould is connected with a pipe mouth of a plastic connecting pipe, and the flow channel thereof is unobstructed. Background Art

[0002] After the injection molded pipe fittings are connected to the pipe, the flow channel is blocked, which has always been a concern of the mold industry. Therefore, it has been innovated many times based on the existing technology. The traditional drainage socket pipe fitting mold adopts a horseshoe structure to solve the flow channel blockage problem. It has a narrow application range and limited shape, and is not suitable for the manufacture of pipe fittings of multiple specifications. There is also a large arc demoulding structure for the mold core, which is also only applicable to socket pipe fittings and drainage systems, and is one-way without blockage. For gas transmission PE pipe fittings, including butt-joint pipe fittings and fusion pipe fittings, that is, they cannot be used when their diameters are the same. Other water supply pipe fittings, such as PE butt-joint pipe fittings, have uneven wall thickness and thickness during the production and molding process, which makes molding difficult, resulting in significant deformation of the produced pipe port and increased out-of-roundness, and they have to be fixed with a clamp. And because of the non-uniform flow channel cross-section, the fluid discharge is not smooth, the resistance is increased, and the output is reduced. Therefore, it is urgent to develop and research a pipe fitting product without blockage in gas and water transmission, and a mold for producing such a pipe fitting product, including its molding method. Summary of the invention

[0003] The purpose of the present invention is to provide a flow channel non-blocking pipe fitting mold and a molding method thereof. Its products include butt-joint pipe fittings, fusion pipe fittings, at least including but not limited to tee pipe fittings, elbow pipe fittings, and oblique tee pipe fittings.

[0004] The technical solution of the present invention is achieved in this way:

[0005] Provided is a flow channel non-blocking pipe fitting mold and a molding method thereof, the flow channel non-blocking pipe fitting mold comprises a movable mold matched with the fixed mold and a cavity formed between the fixed mold and the movable mold, characterized in that: the cavity is provided with a plurality of core slider assemblies arranged on the cavity corresponding to the characteristics of the product to be produced, the plurality of core slider assemblies are all arranged on different sides of the movable mold, wherein a core slider assembly arranged on one side of the movable mold includes but is not limited to a main core slider guide rail cooperation action unit, which is used to coordinate with other core slider assemblies to mold the product to be produced Demolding after molding; the main core slider guide matching unit includes a main core slider, a center rod is provided in the main core slider, a molding insert is provided at the junction of the front end of the center rod and the core of the combination of other core sliders, and the main core slider slides on the center rod; the corresponding molding insert is selected to be used for the product to be produced, obviously, including its shape; the end of the center rod is fixed on the tailstock frame located on one side of the movable mold, and the tailstock frame is also provided with a first oil cylinder, which is connected to the main core slider; that is, the main core slider is controlled by the first oil cylinder to move in the center The main mold core slider moves forward or backward on the rod to complete product molding or demoulding; in order to adapt to the situation that some products to be produced have relatively large demoulding stress, a product-pushing unit is also provided on the same side of the main core slider guide rail cooperation action unit, and the product-pushing unit includes a mechanical push hand, which is connected to the second oil cylinder provided on the tailstock frame and arranged in the same direction as the main mold core slider, so that the main mold core slider is reset after the straight three-way pipe fitting is formed, and it extends forward to eject the product; in order to overcome the difficulty of demoulding and outputting the product due to the insufficient space height difference caused by the interval between the cavity and the product ; A demoulding height compensation lifting unit is provided, and the demoulding height compensation lifting unit includes a third oil cylinder, the third oil cylinder is provided at the bottom side of the movable mold and fixed on the movable mold, and the third oil cylinder is connected to a support plate connected and fixed with the tailstock; the third oil cylinder lifts the support plate and the tailstock as a whole, drives the main core slider guide matching unit and / or the product falling unit provided thereon to move upward, so as to facilitate the product to be lifted away from the initial position of the cavity when demoulding, i.e., the height difference, and facilitates the product to be released, thereby increasing the degree of automation of product production;

[0006] Among the various molds used above, a mold provided with the main core slider guide rail matching unit, the product falling-off pushing unit, and the demoulding height compensation lifting unit is selected, including at least but not limited to a molding method of a straight tee pipe fitting mold:

[0007] The molding method comprises the following steps:

[0008] Step 1: After the movable mold and the fixed mold are closed, the pouring is completed and the mold is opened. The core slider assemblies provided on the movable mold and the main core slider of the main core slider guide rail cooperation action unit all produce core pulling action at the same time under the action of the first oil cylinder, and the core pulling is completed;

[0009] Step 2: The third oil cylinder starts to move, and lifts the main core slider guide matching unit and / or the product pushing unit provided on the tailstock frame and the pallet upward as a whole, so that they are at a certain distance from the cavity of the movable mold; that is, a corresponding height difference is generated to facilitate the pushing and dropping of the product;

[0010] Step 3: The second oil cylinder starts to move, the mechanical pusher pushes the product away from the molding insert and moves forward, the product falls off due to the force, and the second oil cylinder resets;

[0011] Step 4: The third oil cylinder is reset, the cores on the core slider assemblies, and the main core of the main core slider on the main core slider guide and the action unit are reset, and the mold closing is completed.

[0012] By repeating steps 1 to 4 over and over again, corresponding products, including at least but not limited to straight tee pipe fittings, can be automatically produced.

[0013] The arrangement of various related pipe fitting molds of the present invention fully designs the forming inserts, ensuring that the flow paths of various pipe fitting products produced using the same are free of obstruction; after the center rod is combined with the forming insert, its cross-sectional proportion is always constrained within the diameter range of the inner cavity of the pipe fitting product during the demolding process, which can fully meet the boundary conditions required for demolding and ensure effective demolding action; the above three technical units arranged on the mold coordinate and cooperate and operate in an orderly manner to ensure production efficiency; the pipe fitting products produced using the present invention include at least but are not limited to straight tee pipe fittings, oblique tee pipe fittings, and elbows at various angles; it reflects the diversity, flexibility and extensiveness of product design, and the technical units of the present invention can be modularized, which has broad market prospects and industrial development advantages in the field of building materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the combined structure of a straight tee pipe fitting mold according to an embodiment of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the combined structure of the middle moving mold.

[0016] Figure 3 yes Figure 2 The moving mold shown in the figure is provided with a main core slider guide cooperation action unit, a product falling-off pushing unit, and a demoulding height compensation lifting unit.

[0017] Figure 4 yes Figure 3 Schematic diagram of the partial structure in which the structure shown is fixed on the movable mold.

[0018] Figure 5 yes Figure 2 The structure shown is a schematic diagram of the main core slider in the mold closing state.

[0019] Figure 6 yes Figure 2 The structure shown is a schematic diagram of the main core slider in the core pulling state.

[0020] Figure 7 yes Figure 6 The structure shown is a schematic diagram of an explosion structure used in the production of straight tee pipe fittings.

[0021] Figure 8 yes Figure 7 Schematic diagram of part of the structure after changing the viewing angle.

[0022] Fig. 9 yes Figure 6 Schematic diagram of the explosion of part of the structure after changing the perspective.

[0023] Fig.10 It is a schematic diagram of the combined structure of a movable mold of an oblique tee pipe fitting mold according to another embodiment of the present invention.

[0024] Fig.11 yes Figure 2 The center rod shown is connected to the forming insert and is used for producing a straight tee pipe fitting mold.

[0025] Fig.12 It is a visual diagram of the usage state of a straight tee pipe fitting during production according to an embodiment of the present invention, in which the center rod is connected to the core insert and is constrained within the diameter of the straight tee pipe fitting during demoulding.

[0026] Fig.13 Another embodiment of the present invention is that when the right angle elbow mold is working, the main core slider and the center rod and

[0027] Schematic diagram of the relative positions of the molding inserts.

[0028] Fig.14 yes Fig.13 Schematic diagram of the structure shown applied to the moving mold.

[0029] Fig.15 It is a planar structural diagram of the oblique tee pipe forming insert of the present invention.

[0030] Fig.16 It is a planar structural diagram of the straight tee pipe forming insert of the present invention.

[0031] Fig.17It is a planar structural diagram of the straight tee pipe fitting of the present invention.

[0032] Fig.18 It is a planar structural diagram of a straight tee pipe fitting in the prior art.

[0033] Fig.19 It is a planar structural diagram of the oblique three-way pipe fitting of the present invention.

[0034] Fig. 20 It is a planar structural diagram of an oblique tee pipe fitting in the prior art. DETAILED DESCRIPTION

[0035] The following is described in conjunction with the above drawings, but should at least not be limited to the following embodiments of the present invention:

[0036] See attached Figure 1 To Attachment Fig. 9 First, a flow channel non-blocking pipe fitting mold is provided, specifically as shown in the attached Figure 1 The straight tee flow channel non-blocking pipe fitting mold shown in the figure and the attached Figure 2 It comprises a movable mold 2 matched with a fixed mold 1 and a cavity 3 formed between the fixed mold 1 and the movable mold 2. The cavity 3 is provided with two permanent core slider assemblies 4 arranged on the cavity 3 and a main core slider guide rail matching action unit in the present invention according to the product characteristics of the straight tee to be produced. The two core slider assemblies 4 and the main core slider guide rail matching action unit are arranged on different sides of the movable mold 2. The position distribution thereof is shown in the attached Figure 2 As shown, the two permanent core slider assemblies 4 and the one main core slider guide rail of the present invention cooperate with the action unit to coordinate the action to mold the straight tee pipe fitting and then demould it; see Figure 7 The main core slider guide matching unit includes a main core slider 5, on which a slider 501 and a center rod 502 are provided, and the two are integrated into one; a molding insert 503 is provided at the junction of the front end of the center rod 502 and the core of the two permanent core slider combinations 4, and the main core slider 5 slides on the center rod 502 through the guide hole 505 provided thereon; the molding insert 503 corresponding to the straight tee is selected, obviously, including its shape in the straight tee, see Fig.16 As shown; the end of the center rod 502 is fixed on the tailstock 6 located on one side of the movable mold 2, and the tailstock 6 is also provided with a first oil cylinder 601, which is connected to the main core slider 5; that is, the main core slider 5 is controlled by the first oil cylinder 601 to move forward or backward on the center rod 502 to complete product molding or demoulding; see Figure 7The center rod 502 and the main core slider 5 are connected to each other because the stress on the contact surface between the core and the molding insert and the inner cavity of the straight three-way pipe fitting is relatively large when the straight three-way pipe fitting is demoulded. A product-pushing unit is also provided on the same side of the main core slider guide rail cooperation action unit. The product-pushing unit includes a mechanical push hand 701. The mechanical push hand 701 is connected to the second oil cylinder 602 provided on the tailstock frame 6 and is arranged in the same direction as the main core slider 5. See Figure 2 As shown; it is convenient for the main core slider 5 to reset after the straight tee pipe fitting is formed, and it extends forward to eject the product; in order to overcome the difficulty of demoulding and outputting the product due to the insufficient spatial height difference between the cavity 3 and the interval after the straight tee pipe fitting is formed; the present invention further provides a demoulding height compensation lifting unit, and the demoulding height compensation lifting unit includes a third oil cylinder 901, and the third oil cylinder 901 is arranged on the bottom side of the movable mold 2 and fixed on the movable mold 2. For the specific arrangement on the movable mold 2, please refer to the following and the drawings of the present invention for further definition; the third oil cylinder 901 is connected to the support plate 8 connected and fixed with the tail stock frame 6; the third oil cylinder 901 lifts the support plate 8 and the tail stock frame 6 as a whole, driving the main core slider guide matching unit and the product-pushing unit arranged thereon to move upward; it is convenient for the straight tee pipe fitting to be lifted away from the initial position of the cavity when demoulding to produce a relative displacement difference, that is, a height difference, so as to facilitate the ejection of the straight tee pipe fitting and increase the degree of automation of the production of the straight tee pipe fitting;

[0037] Further, a molding method of a straight tee pipe fitting mold without flow obstruction is provided, including at least but not limited to the molding method of the straight tee pipe fitting mold:

[0038] The molding method comprises the following steps:

[0039] Step 1: After the movable mold 2 and the fixed mold 1 are closed, the pouring is completed and the mold is opened. The two permanent core slider assemblies 4 provided on the movable mold 2 and the one main core slider 5 of the main core slider guide cooperation action unit are simultaneously pulled out by the first oil cylinder 601, and the core pulling is completed.

[0040] Step 2: The third oil cylinder 901 starts to move, and lifts the main core slider guide matching unit and the product-pushing unit provided on the tailstock frame 6 and the pallet 8 upward as a whole, so that they are at a certain distance from the initial position of the cavity of the movable mold 2; that is, a corresponding height difference is generated to facilitate the pushing and dropping of the straight tee pipe fitting;

[0041] Step 3: The second oil cylinder 602 starts to move, the mechanical pusher 701 pushes the product away from the molding insert 503 and moves forward, the straight three-way pipe fitting falls off due to the force, and the second oil cylinder 602 is reset;

[0042] Step 4: the third oil cylinder 901 is reset, the cores of the two permanent core slider assemblies 4 and the main core 504 of the main core slider 5 on the main core slider guide cooperation action unit are reset, and the mold closing is completed.

[0043] By repeating steps 1 to 4 over and over again, corresponding products, including at least but not limited to straight tee pipe fittings, can be automatically produced.

[0044] Below, in combination with the above embodiments, embodiments are provided to further define the technical features of the present invention, but they should not be construed as limiting the present invention:

[0045] See attached Figure 4 , the third oil cylinder 901 is fixed on the platform 9 of the movable mold 2, and a straight slot hole is provided on the platform 9. The support rod 801 provided on the support plate 8 moves up and down in the straight slot hole; a workbench 11 is provided under the movable mold 2, and pad blocks 10 are provided on both sides of the workbench 11, and the platform 9 is placed on the pad blocks 10; the support rod 801 moves downward and is limited above the table surface of the platform 9; after such arrangement, the third oil cylinder 901 can drive the support plate 8 and the main core slider guide matching unit and the product-pushing unit provided on the tailstock frame 6 to move upward, thereby forming the height difference required for product demolding.

[0046] Preferably, a guide cylinder 13 is provided above the table surface of the platform 9 and the workbench 11 at a position corresponding to the straight slot hole, and the support rod 801 moves in the guide cylinder 13; that is, the main core slider guide matching unit and the product falling-off pushing unit provided on the support plate 8 and the tailstock frame 6 are driven by the third oil cylinder 901 to move up and down in the guide cylinder 13 under the action of the support rod 801.

[0047] See also Figure 7 and Figure 8 The mechanical push hand 701 is arranged on the push rod assembly 7, and the push rod 702 arranged on the push rod assembly 7 moves through the slot 1201 of the guide block 12 arranged on the support plate 8; a crescent 7011 is arranged on the mechanical push 701 to match the surface shape of the main core 504; when the mechanical push hand 701 is placed in the initial position, it cooperates with the notch 5011 of the slider 501.

[0048] Preferably, a guide block 802 is provided on the support plate 8 , and the main core slider 5 moves along the surface of the guide block 802 .

[0049] Provide another embodiment: see attached Fig.10The present invention is an inclined three-way pipe fitting mold, in which the main core slider guide matching unit arranged thereon and one of the other two permanent core slider assemblies 4 have an included angle of 45 degrees, and other structures are the same as the above-mentioned embodiments.

[0050] By analogy, there are many similar embodiments, which will not be described in detail.

[0051] See also Fig.14 , provides another embodiment: the present invention is a right-angle elbow pipe fitting mold, according to its technical characteristics, no demoulding height compensation lifting unit is set on the mold, and other structures are the same as the above-mentioned embodiments.

[0052] By analogy, there are many similar embodiments, which will not be described in detail.

[0053] See also Fig.12 , all embodiments of the present invention, such as Fig.11 As shown, after the center rod 502 is combined with the molding insert 503, its cross-sectional area is always smaller than the diameter of the inner cavity of the pipe product, that is, during the demolding process, it is always constrained within the diameter range of the inner cavity of the pipe product, which can fully meet the boundary conditions required for demolding and ensure the effective demolding action; and there will be no situation that hinders demolding.

[0054] Fig.15 and Fig.16 The specific shapes of the molding insert 503 used when applied to the oblique tee pipe fitting mold and the straight tee pipe fitting mold are respectively given. According to different embodiments, the corresponding appearance of the molding insert 503 can be designed accordingly.

[0055] Figures 17 to 20 A straight tee pipe fitting product 14 of the present invention and an oblique tee pipe fitting product 16 of the present invention are respectively given, and a conventional straight tee pipe fitting product 15 and a conventional oblique tee pipe fitting product 17 are also given. From the figures, the differences in the flow channels and shapes formed after molding can be compared for distinction.

[0056] By analogy, there are many similar products, which I will not go into detail.

[0057] To sum up, when the present invention is implemented, the corresponding mold with the technical characteristics of the present invention can be selected according to production needs. Especially when there are many molds to be opened and the repeatability is strong, the main core slider guide matching unit and the product falling-off pushing unit described in the present invention can be modularized to further improve the efficiency of mold production.

[0058] Although the above only shows some detailed embodiments of the present invention, it is obvious that those skilled in the art can make some appropriate modifications and changes without violating the present invention; the contents mentioned in the above description and drawings are only for understanding and interpretation of the present invention, and are not limitations of the present invention; the flow channel non-blocking pipe fitting mold and its molding method having the technical features described in this article should fall within the scope of protection of this patent.

Claims

1. A molding method for a pipe fitting mold without flow obstruction, comprising a movable mold matched with a fixed mold and a cavity formed between the fixed mold and the movable mold, wherein the cavity is provided with a plurality of core slider assemblies arranged on the cavity corresponding to the characteristics of the product to be produced, and the plurality of core slider assemblies are arranged on different sides of the movable mold, wherein a core slider assembly arranged on one side of the movable mold includes but is not limited to a main core slider guide rail matching action unit, which is used to coordinate with other core slider assemblies to mold the product to be produced and then demold it; the main core slider guide rail matching unit includes a main core slider, a center rod is provided in the main core slider, a molding insert is provided at the junction of the front end of the center rod and the core of other core slider assemblies, and the main core slider slides on the center rod through a guide hole provided thereon; the corresponding molding insert is adopted when selecting the product to be produced; the end of the center rod is fixed on a tailstock frame located on one side of the movable mold, and the tailstock frame is also provided with a first oil cylinder, and the first oil cylinder is connected to the main mold The main core slider is connected; that is, the main core slider is controlled by the first oil cylinder to move forward or backward on the center rod to complete product molding or demolding; a product-pushing unit is also arranged on the same side of the main core slider guide rail cooperation action unit, and the product-pushing unit includes a mechanical push hand, which is connected to the second oil cylinder arranged on the tailstock frame and arranged in the same direction as the main core slider, so that the main core slider is reset after the straight tee pipe fitting is formed, and it extends forward to eject the product; a demolding height compensation lifting unit is provided, and the demolding height compensation lifting unit includes a third oil cylinder, which is arranged on the bottom side of the movable mold and fixed on the movable mold, and the third oil cylinder is connected to a support plate connected and fixed to the tailstock frame; the third oil cylinder lifts the support plate and the tailstock frame as a whole, driving the main core slider guide rail cooperation unit and / or the product-pushing unit arranged thereon to move upward, so that it is convenient to lift it away from the initial position of the cavity when the product is demolded to generate a relative displacement difference, that is, a height difference; its molding method includes the following steps: Step 1: After the movable mold and the fixed mold are closed, the pouring is completed and the mold is opened. The core slider assemblies provided on the movable mold and the main core slider of the main core slider guide rail cooperation action unit all produce core pulling action at the same time under the action of the first oil cylinder, and the core pulling is completed; Step 2: The third oil cylinder starts to move, and lifts the main core slider guide matching unit and / or the product pushing unit provided on the tailstock frame and the pallet upward as a whole, so that they are at a certain distance from the cavity of the movable mold; that is, a corresponding height difference is generated to facilitate the pushing and dropping of the product; Step 3: The second oil cylinder starts to move, the mechanical pusher pushes the product away from the molding insert and moves forward, the product falls off due to the force, and the second oil cylinder resets; Step 4: The third oil cylinder is reset, the cores on the core slider assemblies, and the main core of the main core slider on the main core slider guide and the action unit are reset, and the mold closing is completed.

2. The forming method of the flow channel non-blocking pipe fitting mold according to claim 1, characterized in that: The third oil cylinder is fixed on the platform of the movable mold, and a straight slot hole is arranged on the platform. The support rod arranged on the support plate moves up and down in the straight slot hole; a workbench is arranged under the movable mold, and pad blocks are arranged on both sides of the workbench, and the platform is placed on the pad blocks; the support rod moves downward and is limited above the table surface of the platform.

3. The forming method of the flow channel non-blocking pipe fitting mold according to claim 2, characterized in that: A guide cylinder is arranged above the platform and the table surface of the workbench at a position corresponding to the straight slot hole, and the support rod moves in the guide cylinder.

4. The forming method of the flow channel non-blocking pipe fitting mold according to claim 1, characterized in that: The product is a straight tee pipe fitting or an oblique tee pipe fitting or a right-angle elbow pipe, but is not limited to a straight tee pipe fitting or an oblique tee pipe fitting or a right-angle elbow pipe.

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