CN111703030A - Runner-free pipe fitting mold and forming method thereof - Google Patents

Abstract

A flow channel unblocked pipe fitting mold and a forming method thereof, including a movable mold matched with a fixed mold thereof and a cavity formed between the fixed mold and the movable mold, and the cavity is provided with corresponding to it according to the characteristics of the product to be produced. Several core-slider combinations arranged on the cavity, the several core-slider combinations are arranged on different sides of the movable mold, wherein one core-slider combination is provided on one side of the movable mold , including but not limited to a main core slider guide with an action unit for coordinating action with other core sliders to mold the product to be produced and demolded; the mold is also provided with a demoulding The height compensation jacking unit or the unit for pushing the product to fall off is selected and set; the forming method includes four steps to complete; the setting of various related pipe fitting molds in the present invention fully designs the forming inserts, ensuring that various pipe fitting products produced by using them are provided. , its flow channel has no blocking phenomenon; its products include but are not limited to straight three-way pipe fittings or inclined three-way pipe fittings or right-angle elbows.

Description

Runner-free pipe fitting mold and forming method thereof

technical field

The invention relates to the field of pipe fitting moulds, in particular to a mould for forming a pipe fitting runner, including a forming method thereof; Its flow channel is unobstructed and unobstructed.

Background technique

After the injection pipe fitting is connected with the pipe, the problem of blockage of the flow channel has always been a concern of the mold industry. Therefore, on the basis of the existing technology, many innovations have been made on it; the traditional drain socket pipe fitting mold, The horseshoe structure is used to solve the problem of runner blockage, which has a narrow application surface and limited shape, and is not suitable for the manufacture of multi-specification pipe fittings. Drainage system, and it is one-way non-blocking; PE pipe fittings for gas transmission include butt pipe fittings and dissolving pipe fittings, that is, they cannot be used when their diameters are the same; Uneven thickness, different thickness, and difficult forming, resulting in significant deformation of the produced pipe fittings and increased out-of-roundness, so they have to be fixed with clamps; and because the cross-section of the flow channel is not uniform, the fluid discharge is not smooth, and the resistance increases. Therefore, there is an urgent need to develop and research a pipe fitting product that has no blockage in gas and water delivery, and a mold for producing such a pipe fitting product, including its forming method.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a flow channel unblocked pipe fitting mould and its forming method. Its products include butt pipe fittings, fusion pipe fittings, at least but not limited to tee fittings, elbow fittings, and inclined tee fittings.

The technical scheme of the present invention is realized as follows:

Provided is a flow channel non-blocking pipe fitting mold and a molding method thereof. The flow channel non-blocking pipe fitting mold includes a movable mold matched with a fixed mold and a cavity formed between the fixed mold and the movable mold, and is characterized in that: According to the characteristics of the product to be produced, the cavity is provided with a plurality of core-slider assemblies arranged on the cavity corresponding thereto, and the several core-slider assemblies are arranged on different sides of the movable mold, A core-slider combination set on one side of the movable mold includes, but is not limited to, a main core-slider guide rail cooperating action unit for coordinating action with other core-slider combinations to be produced. The product is demolded after molding; the main core slider guide rail matching unit includes a main core slider, a center rod is arranged in the main core slider, and the front end of the center rod is combined with other core sliders There is a forming insert at the joint of the core, and the main core slider slides on the center rod; select the product to be produced and use the corresponding forming insert, obviously, including its shape; the end of the center rod is fixed On the tailstock frame located on one side of the movable die, the tailstock frame is also provided with a first oil cylinder, and the first oil cylinder is connected with the main core slider; that is, the main oil cylinder is used to control the main The core slider moves forward or backward on the central rod to complete product forming or demoulding; in order to adapt to the situation where the relative stress of some products to be produced is relatively large, the main core slider guide rail cooperates with the action unit. There is also a unit for pushing the product to fall off on the same side, and the unit for pushing the product to fall off includes a mechanical pusher. The mechanical pusher is connected to the second oil cylinder provided on the tailstock frame, and is connected to the main core slider. Arranged in the same direction, it is convenient for the main core slider to reset after the straight tee pipe is formed, and it extends forward to push the product out; in order to overcome the lack of space height difference caused by the gap between the cavity and the product, the product is removed. Difficulty in mold output; set up a ejection height compensation jacking unit, the ejection height compensation jacking unit includes a third oil cylinder, the third oil cylinder is arranged on the bottom side of the movable mold and fixed on the movable mold On the mold, the third oil cylinder is connected to the support plate connected and fixed with the tailstock frame; the third oil cylinder lifts the support plate and the tailstock frame as a whole, and drives the The main core slider guide rail matching unit and/or the pushing product falling off unit moves upward, which is convenient for lifting the product from the initial position of the cavity when the product is demolded, resulting in a relative displacement difference, that is, a height difference, which is convenient for the product to come out and increases the production efficiency of the product. degree of automation;

Among the various molds used above, the molds that are provided with the main core slider guide rail matching unit, the pushing product falling off unit, and the ejection height compensation lifting unit are selected, at least including but not limited to a straight The forming method of the three-way pipe fitting mold:

The molding method includes the following steps:

Step 1: After the movable mold and the fixed mold are closed, the casting is completed and opened. Under the action of the first oil cylinder, the main core slide block simultaneously produces the core pulling action, and the core pulling ends;

Step 2: The third oil cylinder starts to act, and the main core slider guide rail matching unit and/or the pushing product falling off unit set on the tailstock frame and the pallet is lifted upward as a whole, so that the distance between them is The cavity of the movable mold is at a certain distance; that is, the corresponding height difference required to facilitate the product to be pushed out and fall off;

Step 3: The second oil cylinder starts to move, the mechanical pusher pushes the product away from the forming insert and moves forward, the product falls off due to force, and the second oil cylinder is reset;

Step 4: Reset the third oil cylinder, reset the cores on each core-slider combination, and reset the main cores of the main core-slider on the main-core-slider guide rail with the action unit, and close the mold Finish.

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

The arrangement of various related pipe fitting molds in the present invention fully designs the forming inserts, ensuring that various pipe fitting products produced by using them have no blockage in the flow passages; after the center rod is combined with the forming inserts, the cross section occupies In the process of demolding, 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; the above three technical units set on the mold are coordinated Coordination and orderly action ensure production efficiency; the pipe fitting products produced by the present invention at least include but are not limited to straight three-way pipe fittings, inclined three-way pipe fittings, and elbows of various angles; it reflects the diversity and flexibility of product design. It has wide market prospects and industrial development advantages in the field of building materials.

Description of drawings

FIG. 1 is a schematic diagram of the combined structure of a straight three-way pipe fitting mold according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the combined structure of the movable mold in FIG. 1 .

Fig. 3 is a partial structural schematic diagram of the movable die shown in Fig. 2 with the main core slider guide rail cooperating action unit, the product pushing unit falling off, and the demolding height compensation jacking unit.

FIG. 4 is a partial structural schematic diagram of the structure shown in FIG. 3 being fixed on the movable mold.

FIG. 5 is a schematic structural diagram of the main core slider in the clamping state in the structure shown in FIG. 2 .

FIG. 6 is a schematic structural diagram of the main core slider in the core pulling state in the structure shown in FIG. 2 .

FIG. 7 is a schematic diagram of an explosion structure of the structure shown in FIG. 6 applied to the production of straight three-way pipe fittings.

FIG. 8 is a schematic diagram of a part of the structure of FIG. 7 after the viewing angle is changed.

FIG. 9 is a schematic exploded view of a part of the structure after the viewing angle is changed in FIG. 6 .

FIG. 10 is a schematic view of the combined structure of the movable mold of the inclined tee pipe fitting mold according to another embodiment of the present invention.

FIG. 11 is a schematic structural diagram of the center rod shown in FIG. 2 connected with the forming insert and used for producing a mold for straight three-way pipe fittings.

12 is a visual view of the use state when the central rod is connected with the core insert and is constrained within the diameter of the straight three-way pipe to be demolded during the production of the straight three-way pipe according to an embodiment of the present invention.

13 is another embodiment of the present invention when the right-angle elbow mold is working, the main core slider and the center rod and

Schematic diagram of the state of the relative position of the forming inserts.

FIG. 14 is a schematic structural diagram of the structure shown in FIG. 13 applied to the movable die.

Fig. 15 is a plan view of the inclined three-way pipe forming insert of the present invention.

Fig. 16 is a plan view of the straight three-way pipe forming insert of the present invention.

Fig. 17 is a plan view of the straight three-way pipe fitting of the present invention.

Fig. 18 is a plan view of a straight three-way pipe fitting in the prior art.

Fig. 19 is a plan view of the inclined three-way pipe fitting of the present invention.

Fig. 20 is a plan view of the inclined three-way pipe fitting in the prior art.

Detailed ways

Described below in conjunction with the above drawings, but at least should not be limited to the following embodiments of the present invention:

Referring to Fig. 1 to Fig. 9, firstly provide a mold for pipe fittings without blockage of flow channels, specifically, as shown in Fig. 1, and referring to Fig. 2, it includes The movable mold 2 matched with the fixed mold 1 and the cavity 3 formed between the fixed mold 1 and the movable mold 2. The cavity 3 is provided with a corresponding arrangement on the mold according to the product characteristics of the straight tee of the product to be produced. The two permanent core-slider assemblies 4 on the cavity 3 cooperate with one main core-slider guide rail in the present invention, and the two core-slider assemblies 4 cooperate with one main core-slider guide rail to act together The units are all arranged on different sides of the movable die 2, and their position distribution is shown in Figure 2. The two permanent core sliders are combined 4 and one main core slider guide rail of the present invention cooperates with the action unit Coordinate action to mold the straight three-way pipe fittings and then demould; refer to FIG. 7 , the main core slider guide rail matching unit includes a main core slider 5, on which is provided with a sliding The block 501 and a center rod 502 are integrated into one; the front end of the center rod 502 and the core joint of the two permanent core slider assemblies 4 are provided with a molding insert 503, and the main core slider 5 is arranged on it. The guide hole 505 slides on the center rod 502; the molding insert 503 corresponding to the straight tee is selected, obviously, including its shape in the straight tee, as shown in FIG. 16; the end of the center rod 502 is fixed on the On the tailstock frame 6 located on one side of the movable die 2, a first oil cylinder 601 is also provided on the tailstock frame 6, and the first oil cylinder 601 is connected with the main core slider 5; The first oil cylinder 601 controls the main core slider 5 to move forward or backward on the central rod 502 to complete product forming or demoulding; see FIG. 7 , the central rod 502 and the main core slider 5 Considering the large stress on the contact surface between the core and the forming insert and the inner cavity of the straight three-way pipe when the straight three-pipe pipe is demolded, there is also a device on the same side of the main core slider guide with the action unit to push the product to fall off. The unit for pushing the product to fall off includes a mechanical pusher 701 which 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 , as shown in Figure 2; it is convenient for the main core slider 5 to reset after the straight tee pipe fitting is formed, and it extends forward to push the product out; in order to overcome the gap between the cavity 3 and the straight tee pipe fitting after forming, the Insufficient space height difference makes it difficult to eject the product; the present invention further provides a ejection height compensation jacking unit, the ejection height compensation jacking unit includes a third oil cylinder 901, the third oil cylinder 901 It is arranged on the bottom side of the movable die 2 and fixed on the movable die 2. For details on the arrangement on the movable die 2, please refer to the following and the accompanying drawings for further limitation; the third oil cylinder 901 is connected and fixed to the movable die 2. The support plate 8 of the tailstock frame 6 is connected; the third oil cylinder 901 lifts the support plate 8 and the tailstock frame 6 as a whole, and drives the main core slider guide rail provided on it to cooperate The unit and the push product falling unit move upwards; it is convenient for the straight tee to lift it out of the cavity when it is demolded The relative displacement difference, that is, the height difference, is generated at the initial position, which is convenient for the straight three-way pipe fittings to come out, and increases the automation degree of the straight three-way pipe fittings production;

Further, provide a molding method for the flow channel of the straight three-way pipe without blocking the pipe fitting mold, at least including but not limited to the molding method of this straight three-way pipe fitting mold:

The molding method includes the following steps:

Step 1: After the movable mold 2 and the fixed mold 1 are closed, the casting is completed and opened, and the two permanent core slider assemblies 4 set on the movable mold 2 and the main core slider guide rail Under the action of the first oil cylinder 601, one of the main core sliders 5 of the cooperating action unit simultaneously produces a core-pulling action, and the core-pulling ends;

Step 2: The third oil cylinder 901 starts to move, and lifts the main core slider guide rail matching unit and the pushing product falling off unit provided on the tailstock frame 6 and the pallet 8 as a whole, so that the It is a certain distance from the initial position of the cavity of the movable mold 2; that is, the corresponding height difference required to facilitate the push-out of the straight three-way pipe fittings is generated;

Step 3: The second oil cylinder 602 starts to move, the mechanical pusher 701 pushes the product away from the forming insert 503 and moves forward, the straight three-way pipe is forced to fall off, and the second oil cylinder 602 is reset;

Step 4: The third oil cylinder 901 is reset, the cores of the two permanent core-slider assemblies 4 and the main core-slider guide rails cooperate with the main core 504 of the main core-slider 5 on the action unit to reset, Clamping ends.

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

Below, in conjunction with the above embodiments, the technical features of the present invention are further limited to provide embodiments, but should not be construed as limitations of the present invention:

Referring to FIG. 4 , the third oil cylinder 901 is fixed on the platform 9 of the movable die 2 , the platform 9 is provided with a straight slot hole, and the support rod 801 provided on the support plate 8 is in the straight slot The hole moves up and down; a worktable 11 is arranged below the movable die 2, a pad block 10 is provided on both sides of the work table 11, and the platform 9 is placed on the pad block 10; the support The downward movement of the rod 801 is limited above the table top of the platform 9 ; after this setting, the support plate 8 and the main core set on the tailstock frame 6 can be driven by the third oil cylinder 901 The sliding block guide rail matching unit and the pushing product dropping unit move upward, thereby forming a height difference required for product demolding.

Preferably, a guide cylinder 13 is provided above the platform 9 and the workbench 11 corresponding to the straight slot hole, and the support rod 801 moves in the guide cylinder 13; that is, through a third oil cylinder 901 drives the main core slider guide rail matching unit and the pushing product falling off unit provided on the pallet 8 and the tailstock frame 6 to work in the guide cylinder 13 under the action of the support rod 801 . Moving up and down.

Referring to FIGS. 7 and 8 , the mechanical pusher 701 is provided on the push rod assembly 7 , and the push rod 702 provided on the push rod assembly 7 passes through the groove of the guide block 12 provided on the support plate 8 The hole 1201 moves; the mechanical pusher 701 is provided with a crescent 7011 to match the surface shape of the main core 504; the mechanical pusher 701 fits with the recess 5011 of the slider 501 when placed at the initial position .

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 .

Another embodiment is provided: referring to FIG. 10, the present invention is an oblique three-way pipe fitting mold, on which the main core-slider guide rail matching unit and one of the other two permanent core-slider combination 4 are formed. The included angle is 45 degrees, and other structures are the same as in the previous embodiment.

By analogy, there are still many similar embodiments, which will not be repeated.

Referring to FIG. 14 , another embodiment is provided: a right-angle elbow pipe fitting mold of the present invention, according to its technical characteristics, there is no ejection height compensation jacking unit on the mold, and other structures are the same as the previous embodiments.

By analogy, there are still many similar embodiments, which should not be repeated.

Referring to FIG. 12 , in all embodiments of the present invention, such as shown in FIG. 11 , after the central rod 502 is combined with the molding insert 503 , the proportion of its cross-section is always smaller than the diameter of the inner cavity of the pipe product, that is, during the demolding process , which is always constrained within the diameter range of the inner cavity of the pipe product, can fully meet the boundary conditions required for demolding, and ensure the effective demolding action; and will not produce any situation that hinders demolding.

Figures 15 and 16 respectively show the specific shapes used when the forming inserts 503 are applied to the oblique three-way pipe fitting mould and the straight three-way fitting moulding. According to different embodiments, the corresponding forming inserts can be designed accordingly 503 shape.

Figures 17 to 20 respectively show the straight tee pipe fitting product 14 of the present invention and the inclined tee pipe fitting product 16 of the present invention, and show the conventional straight tee pipe fitting product 15 and the conventional inclined tee pipe fitting product 17. The differences in the runners and shapes formed after molding can be compared in order to distinguish.

By analogy, there are still many similar products, and I will not repeat them.

To sum up, when the present invention is implemented, corresponding molds with the technical characteristics of the present invention can be selected correspondingly according to production requirements, especially when there are many molds opened and the repeatability is strong, the main core of the present invention can be slid The block guide rail matching unit and the product pushing unit are modularized, so as to further improve the efficiency of the production mold.

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 departing from the present invention; The content is only for the understanding and interpretation of the present invention, not a limitation of the present invention; the flow channel unblocked pipe fitting mold and its forming method with the technical characteristics described in this article shall fall within the protection scope of this patent.

Claims (10)

1. A runner-free pipe fitting mould, comprising a movable die matched with its fixed die and a cavity formed between the fixed die and the movable die, characterized in that: the cavity is provided with a characteristic of the product to be produced on the cavity. Correspondingly, there are several core-slider combinations arranged on the cavity, and the several core-slider combinations are arranged on different sides of the movable mold, wherein one mold is provided on one side of the movable mold. The core-slider combination, including but not limited to a main core-slider guide rail cooperating action unit, used for coordinating action with other core-slider combinations to mold the product to be produced and then demolding; the main core-slider The slider guide rail matching unit includes a main core slider, a center rod is arranged in the main core slider, and a molding insert is arranged at the joint of the core where the front end of the center rod is combined with the other core sliders, so the The main core slider slides on the central rod through the guide hole provided on it; selects the product to be produced and adopts the corresponding forming insert; the end of the central rod is fixed on the tail located on one side of the movable mold On the seat frame, the tailstock frame is also provided with a first oil cylinder, and the first oil cylinder is connected with the main core slider; Front or back to complete product forming or demolding. 2 . The flow channel non-blocking pipe fitting mold according to claim 1 , wherein the main core slider guide rail cooperates with the action unit and is further provided with a pushing product falling off unit, and the pushing product falling off unit comprises: 2 . A mechanical pusher, which is connected to the second oil cylinder provided on the tailstock frame, and is arranged in the same direction as the main core slider, so that the main core slider can be reset after the straight tee is formed. , which extends forward to eject the product. 3. The flow channel non-blocking pipe fitting mold according to claim 1 or 2, characterized in that: a demolding height compensation lifting unit is provided, and the demoulding height compensation lifting unit comprises a third oil cylinder, the A third oil cylinder is arranged on the bottom side of the movable die and is fixed on the movable die, and the third oil cylinder is connected to a support plate connected to and fixed with the tailstock; The plate and the tailstock frame are integrally lifted up, driving the main core slider guide rail matching unit and/or the pushing product falling unit to move upwards, which is convenient for lifting the product from the initial cavity of the mold when it is demolded. The position produces a relative displacement difference, that is, a height difference. 4 . The flow channel non-blocking pipe fitting mold according to claim 3 , wherein the third oil cylinder is fixed on the platform of the movable die, and the platform is provided with straight slot holes. 5 . , the support rod set on the support plate moves up and down in the straight slot hole; a workbench is set below the movable die, and pads are set on both sides of the workbench, and the platform is placed on the The support rod is limited to move downwards above the table top of the platform. 5. The flow channel non-blocking pipe fitting mold according to claim 4, wherein a guide cylinder is provided above the platform and the table surface of the workbench, corresponding to the straight slot hole, and the support rod is located at the top of the table. move inside the guide cylinder. 6. The flow channel non-blocking pipe fitting mold according to claim 2 or 3, wherein the mechanical pusher is arranged on the push rod assembly, and the push rod set on the push rod assembly passes through the The slot hole of the guide block provided on the support plate moves; the mechanical pusher is provided with a crescent to match the outer shape of the main core surface; Lack of cooperation. 7. A method for forming a mold for a pipe fitting with no blockage in a flow channel, comprising a movable mold matched with a fixed mold thereof and a cavity formed between the fixed mold and the movable mold, and the cavity is provided with a mold corresponding to the mold according to the characteristics of the product to be produced. Correspondingly, several core-slider combinations arranged on the cavity, the several core-slider combinations are arranged on different sides of the movable mold, wherein one core is provided on one side of the movable mold Slider combination, including but not limited to a main core slider guide rail cooperating action unit for coordinating action with other core slider combinations to mold the product to be produced and then demoulding; the main core slide The block guide rail matching unit includes a main core slider, a center rod is arranged in the main core slider, and a molding insert is arranged at the joint of the core where the front end of the center rod is combined with the other core sliders. The main core slider slides on the central rod through the guide hole provided on it; selects the product to be produced and adopts the corresponding forming insert; the end of the central rod is fixed on the tailstock located on one side of the movable mold The tailstock frame is also provided with a first oil cylinder, and the first oil cylinder is connected with the main core slider; that is, the first oil cylinder controls the main core slider to move forward on the center rod Or backward to complete product forming or demoulding; the same side of the main core slider guide rail with the action unit is also provided with a product pushing unit, and the pushing product dropping unit includes a mechanical pusher, the mechanical pusher It is connected with the second oil cylinder set on the tailstock frame, and is arranged in the same direction as the main core slider, so that the main core slider can be reset after the straight three-way pipe fitting is formed, and it extends forward to push the product to the top. Out; set up a ejection height compensation jacking unit, the ejection height compensation jacking unit includes a third oil cylinder, the third oil cylinder is arranged on the bottom side of the movable mold and fixed on the movable mold, The third oil cylinder is connected to the support plate connected and fixed with the tailstock frame; the third oil cylinder lifts the support plate and the tailstock frame integrally, and drives the main core set on it. The sliding block guide rail matching unit and/or the pushing product falling off unit moves upward, so that the product can be lifted away from the initial position of the cavity to generate a relative displacement difference, that is, a height difference when the product is demolded; the molding method includes the following steps: Step 1: After the movable mold and the fixed mold are closed, the casting is completed and opened. Under the action of the first oil cylinder, the main core slide block simultaneously produces the core pulling action, and the core pulling ends; Step 2: The third oil cylinder starts to act, and the main core slider guide rail matching unit and/or the pushing product falling off unit set on the tailstock frame and the pallet is lifted upward as a whole, so that the distance between them is The cavity of the movable mold is at a certain distance; that is, the corresponding height difference required to facilitate the product to be pushed out and fall off; Step 3: The second oil cylinder starts to move, the mechanical pusher pushes the product away from the forming insert and moves forward, the product falls off due to force, and the second oil cylinder is reset; Step 4: Reset the third oil cylinder, reset the cores on each core-slider combination, and reset the main cores of the main core-slider on the main-core-slider guide rail with the action unit, and close the mold Finish. 8 . The molding method for a pipe fitting mold without blockage of a flow channel according to claim 7 , wherein the third oil cylinder is fixed on the platform of the movable die, and the platform is provided with straight slot holes, so that the The support rod set on the support plate moves up and down in the straight slot hole; a workbench is set below the movable die, and pads are set on both sides of the workbench, and the platform is placed on the pad On the high block; the downward movement of the support rod is limited above the table top of the platform. 9 . The method for forming a mold for a pipe without blockage of a flow channel as claimed in claim 8 , wherein a guide cylinder is provided above the platform and the table top of the workbench, corresponding to the straight slot hole. 10 . The support rod moves in the guide cylinder. 10. The molding method of the flow channel unblocked pipe fitting mold according to claim 7, wherein the product is a straight three-way pipe fitting or an inclined three-way pipe fitting or a right-angle elbow but is not limited to a straight three-way pipe fitting or an inclined pipe. Tee fittings or right angle elbows.

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