A multi-cavity die injection press forming device for pipe production

Abstract

The utility model discloses a kind of multi-cavity die injection pressure forming devices for pipe production, including die holder, the upper end of die holder is equipped with die groove, the bottom of die groove is equipped with lower die, the upper end of lower die is equipped with the multi-cavity injection pressure groove of cross type distribution, the upper end of the periphery of die holder central position is fixedly equipped with hydraulic cylinder with penetration.This utility model is driven by cylinder cross type support under the limiting action of limiting sliding slot and limiting sliding block Vertical lifting, and by cross type support cooperation several jacking rods drive circular sealing block vertically along circular hole Vertical lifting, so that several circular sealing block ejects the forming pipe in multi-cavity injection pressure groove, conveniently and quickly take out forming pipe, improve pipe forming efficiency, by circulating cooling pipe, cold water is circulated into annular cooling cavity, the injection pressure pipe in multi-cavity injection pressure groove is rapidly cooled, and in injection pressure forming process, using two groups of small fan, injection pressure pipe is rapidly cooled by air blast, improve the cooling forming efficiency of injection pressure pipe.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting production technology, and in particular to a multi-cavity mold injection molding device for pipe fitting production. Background Technology

[0002] Multi-cavity injection molding of pipe fittings is an injection molding technology that uses multi-cavity molds to produce multiple pipe fitting parts simultaneously. Multi-cavity molds are designed with multiple independent or shared flow channel systems to simultaneously fill, hold pressure and cool in one injection cycle to form multiple pipe fittings of the same specifications. It is mainly used in piping systems and mechanical parts.

[0003] Existing multi-cavity injection molding dies are not convenient for quickly ejecting the molded tubes from the multi-cavity mold in actual use, which affects the molding efficiency of the tubes. In addition, the cooling efficiency of the molded tubes in the multi-cavity mold is not good. A multi-cavity injection molding device for tube production is proposed to solve the above problems. Utility Model Content

[0004] In view of the shortcomings and defects in the existing technology, this utility model proposes a multi-cavity mold injection molding device for pipe production, which solves the technical problems in the background technology that the existing multi-cavity mold injection molding mold is not convenient to quickly eject the molded pipe in the multi-cavity mold, thus affecting the molding efficiency of the pipe, and the cooling efficiency of the molded pipe in the multi-cavity mold is poor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-cavity injection molding device for pipe fitting production includes a mold base, a mold groove at the upper end of the mold base, a lower mold at the bottom of the mold groove, a cross-shaped multi-cavity injection groove at the upper end of the lower mold, hydraulic cylinders fixedly penetrating the upper ends of the four cylinders at the center of the mold base, sealing ends fixedly connected to the piston rods of the four hydraulic cylinders, and the four sealing ends movably sealing the inner wall of the multi-cavity injection groove, a rectangular through groove communicating from front to back on the side wall of the mold base directly below the mold groove, a lifting mechanism at the bottom of the rectangular through groove, the lifting mechanism vertically penetrating the bottom of the multi-cavity injection groove, and a cooling mechanism at the upper end of the mold base.

[0006] Preferably, the lifting mechanism includes a cross-shaped support slidably connected within a rectangular through groove. Four cylinders are fixedly installed on the bottom of the rectangular through groove. The upper ends of the piston rods of the four cylinders are fixedly connected to the lower ends of the four sides of the cross-shaped support. Three equally spaced cylindrical blocks are provided on the upper ends of the four sides of the cross-shaped support. Lifting rods are provided on the upper ends of the cylindrical blocks. The lifting rods are vertically inserted through the bottom of the multi-cavity injection groove. The bottom of the multi-cavity injection groove has several circular holes. The lifting rods are vertically inserted through the circular holes. Circular sealing blocks are fixedly connected to the upper ends of the lifting rods. The circular sealing blocks are in sealing contact with the annular inner wall of the circular holes.

[0007] Preferably, limiting grooves are provided on the inner walls of the left and right sides of the center of the rectangular through groove. Both limiting grooves are connected to the top and bottom surfaces of the rectangular through groove. Matching limiting sliders are slidably connected in both limiting grooves. Rectangular slots are provided at the upper ends of both limiting sliders away from the limiting grooves. The left and right ends of the cross-shaped support are respectively inserted into the two rectangular slots and fixed by the first bolt.

[0008] Preferably, each of the cylindrical blocks has a threaded hole at its lower end, and the cross-shaped support is provided with a second bolt through each of the cylindrical blocks at its lower end, and the second bolts are threadedly connected to the threaded holes respectively.

[0009] Preferably, the cylindrical block, lifting rod, and circular sealing block are integrally cast and are all made of hard alloy.

[0010] Preferably, the cooling mechanism includes an annular cooling cavity arranged around the mold groove, a circulating cooling pipe is connected to the top surface of the annular cooling cavity, and mounting brackets are fixedly connected to the left and right side walls near the upper end of the mold base, and a small fan is fixedly installed at the upper end of each of the two mounting brackets.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. The cross-shaped support is driven by the cylinder to rise and fall vertically under the limiting action of the limiting slide groove and the limiting slider. The cross-shaped support, together with several lifting rods, drives the circular sealing block to rise and fall vertically along the circular hole. This allows the circular sealing block to push out the molded pipe in the multi-cavity injection groove, making it convenient to quickly remove the molded pipe and improve the molding efficiency of the pipe.

[0012] 2. Cold water is circulated into the annular cooling chamber through the circulating cooling pipe to quickly cool down the injection molding components in the multi-cavity injection molding tank. During the injection molding process, two sets of small fans are used to quickly blow air to cool down the injection molding components, thereby improving the cooling and molding efficiency of the injection molding components. Attached Figure Description

[0013] Figure 1 This is a perspective view of a multi-cavity mold injection molding device for pipe fitting production proposed in this utility model. Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the lifting mechanism of a multi-cavity mold injection molding device for pipe fitting production proposed in this utility model.

[0014] In the diagram: 1. Mold base, 2. Mold groove, 3. Lower mold, 4. Multi-cavity injection groove, 5. Hydraulic cylinder, 6. Sealing end, 7. Rectangular through groove, 8. Cross-shaped support, 9. Cylinder, 10. Columnar block, 11. Lifting rod, 12. Circular hole, 13. Circular sealing block, 14. Limiting slide groove, 15. Limiting slider, 16. Rectangular slot, 17. First bolt, 18. Second bolt, 19. Annular cooling cavity, 20. Circulating cooling pipe, 21. Mounting bracket, 22. Small fan. Detailed Implementation

[0015] In the description of this utility model, 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 utility model 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 utility model.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-3A multi-cavity injection molding device for pipe fitting production includes a mold base 1, a mold groove 2 at the upper end of the mold base 1, a lower mold 3 at the bottom of the mold groove 2, and a cross-shaped multi-cavity injection groove 4 at the upper end of the lower mold 3. Hydraulic cylinders 5 are fixedly installed around the upper ends of the four cylinders at the center of the mold base 1. Sealing ends 6 are fixedly connected to the piston rods of the four hydraulic cylinders 5, and the four sealing ends 6 are movably sealed through the inner wall of the multi-cavity injection groove 4. The four hydraulic cylinders 5 drive the sealing ends 6 to push and seal the multi-cavity injection groove 4 after mold closing. A rectangular through-slot 7 with front and rear connections is provided on the side wall of the mold base 1 directly below the mold groove 2. A lifting mechanism is provided at the bottom of the rectangular through-slot 7, vertically penetrating the bottom of the multi-cavity injection groove 4. The lifting mechanism includes a cross-shaped support 8 slidably connected within the rectangular through-slot 7. Four cylinders 9 are fixedly installed at the bottom of the rectangular through-slot 7, and the upper ends of the piston rods of the four cylinders 9 are fixedly connected to the lower ends of the four sides of the cross-shaped support 8. Each of the four sides has three equally spaced cylindrical blocks 10 at its upper end. Each cylindrical block 10 has a lifting rod 11 at its upper end. The lifting rods 11 vertically penetrate the bottom of the multi-cavity injection groove 4. The bottom of the multi-cavity injection groove 4 has several circular holes 12. The lifting rods 11 vertically penetrate these circular holes 12. A circular sealing block 13 is fixedly connected to the upper end of each lifting rod 11. The circular sealing blocks 13 are in sealing contact with the annular inner wall of the circular holes 12. When… After the multiple sets of injection fittings in the multi-cavity injection groove 4 are cooled and formed, several cylinders 9 in the rectangular through groove 7 are activated to drive the cross-shaped support 8 to rise and fall vertically under the limiting action of the limiting slide groove 14 and the limiting slider 15. The cross-shaped support 8, together with several cylindrical blocks 10 and lifting rods 11, drives the circular sealing block 13 to rise and fall vertically along the circular hole 12, so that the several circular sealing blocks 13 push out the formed fittings in the multi-cavity injection groove 4, which facilitates the quick removal of the formed fittings and improves the forming efficiency of the fittings.

[0018] Limiting grooves 14 are provided on the inner walls of both sides of the center of the rectangular through groove 7. Both limiting grooves 14 are connected to the top and bottom surfaces of the rectangular through groove 7. Matching limiting sliders 15 are slidably connected in both limiting grooves 14. Rectangular slots 16 are provided at the upper ends of both limiting sliders 15 away from the limiting grooves 14. The left and right ends of the cross-shaped support 8 are respectively inserted into the two rectangular slots 16 and connected and fixed by the first bolt 17. The first bolt 17 is used to fix the cross-shaped support 8 to the limiting slider 15. The limiting slider 15 moves along the limiting groove. When moving, the cross-shaped support 8 can smoothly drive several cylindrical blocks 10 to rise and fall vertically. The lower ends of several cylindrical blocks 10 are provided with threaded holes (not shown in the figure). The cross-shaped support 8 is provided with second bolts 18 through the lower ends of several cylindrical blocks 10. Several second bolts 18 are threadedly connected to several threaded holes respectively. Several cylindrical blocks 10 are fixed on the cross-shaped support 8 by the second bolts 18 and threaded holes (not shown in the figure) for easy replacement. The cylindrical blocks 10, lifting rods 11 and circular sealing blocks 13 are integrally cast and are all made of hard alloy.

[0019] The upper end of the mold base 1 is provided with a cooling mechanism, which includes an annular cooling cavity 19 arranged around the mold groove 2. A circulating cooling pipe 20 is connected to the top surface of the annular cooling cavity 19. The circulating cooling pipe 20, in conjunction with an external refrigeration unit, circulates cold water into the annular cooling cavity 19 to quickly cool down the injection tube in the multi-cavity injection groove 4. Mounting brackets 21 are fixedly connected to the left and right side walls near the upper end of the mold base 1. Small fans 22 are fixedly installed on the upper end of the two mounting brackets 21. The two sets of small fans 22 are used to quickly blow air to cool down the injection tube and improve the cooling and forming efficiency of the injection tube.

[0020] In use, the lower mold 3 is closed, and the hydraulic cylinder 5, in conjunction with the sealing end 6, pushes and seals the multi-cavity injection groove 4. Then, hot-melt raw material is injected into the multi-cavity injection groove 4. A circulating cooling pipe 20, in conjunction with an external refrigeration unit, circulates cold water into the annular cooling chamber 19 to rapidly cool the injection fittings within the multi-cavity injection groove 4. During the injection molding process, two sets of small fans 22 are used to rapidly blow air and cool the injection fittings, improving the cooling and molding efficiency of the injection fittings. After the multiple sets of injection fittings in the cavity injection groove 4 are cooled and formed, several cylinders 9 in the rectangular through groove 7 are activated to drive the cross-shaped support 8 to rise and fall vertically under the limiting action of the limiting slide groove 14 and the limiting slider 15. The cross-shaped support 8, together with several cylindrical blocks 10 and lifting rods 11, drives the circular sealing block 13 to rise and fall vertically along the circular hole 12, so that the several circular sealing blocks 13 push out the formed fittings in the multi-cavity injection groove 4, which facilitates the quick removal of the formed fittings and improves the forming efficiency of the fittings.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-cavity injection molding apparatus for pipe fitting production, comprising a mold base (1), wherein a mold groove (2) is provided at the upper end of the mold base (1), and a lower mold (3) is provided at the bottom of the mold groove (2), characterized in that, The lower mold (3) is provided with a cross-shaped multi-cavity injection groove (4) at its upper end. Hydraulic cylinders (5) are fixedly installed around the upper part of the center position of the mold base (1). Each of the four hydraulic cylinders (5) has a sealing end (6) fixedly connected to its piston rod. The four sealing ends (6) are respectively movably sealed through the inner wall of the multi-cavity injection groove (4). The mold base (1) is provided with a rectangular through groove (7) that is connected from front to back on its side wall directly below the mold groove (2). A lifting mechanism is provided at the bottom of the rectangular through groove (7). The lifting mechanism is vertically installed through the bottom of the multi-cavity injection groove (4). A cooling mechanism is provided at the upper end of the mold base (1).

2. The multi-cavity injection molding apparatus for pipe fitting production according to claim 1, characterized in that, The lifting mechanism includes a cross-shaped support (8) slidably connected in a rectangular through groove (7). Four cylinders (9) are fixedly installed on the bottom of the rectangular through groove (7). The upper ends of the piston rods of the four cylinders (9) are fixedly connected to the lower ends of the four sides of the cross-shaped support (8). Three equally spaced cylindrical blocks (10) are provided on the upper ends of the four sides of the cross-shaped support (8). Lifting rods (11) are provided on the upper ends of the cylindrical blocks (10). The lifting rods (11) are vertically inserted through the bottom of the multi-cavity injection groove (4). The bottom of the multi-cavity injection groove (4) is provided with several circular holes (12). The lifting rods (11) are vertically inserted through the several circular holes (12). Circular sealing blocks (13) are fixedly connected to the upper ends of the lifting rods (11). The circular sealing blocks (13) are in sealing contact with the annular inner wall of the circular holes (12).

3. The multi-cavity injection molding apparatus for pipe fitting production according to claim 2, characterized in that, Limiting grooves (14) are provided on the inner walls of the left and right sides of the center of the rectangular through groove (7). The two limiting grooves (14) are connected to the top and bottom of the rectangular through groove (7). The two limiting grooves (14) are slidably connected with matching limiting sliders (15). The upper ends of the two limiting sliders (15) away from the limiting grooves (14) are provided with rectangular slots (16). The left and right ends of the cross-shaped support (8) are respectively inserted into the two rectangular slots (16) and connected and fixed by the first bolt (17).

4. The multi-cavity injection molding apparatus for pipe fitting production according to claim 2, characterized in that, Each of the cylindrical blocks (10) has a threaded hole at its lower end. The cross-shaped support (8) is provided with a second bolt (18) through each of the cylindrical blocks (10) at its lower end. The second bolts (18) are threadedly connected to the threaded holes respectively.

5. A multi-cavity injection molding apparatus for pipe fitting production according to claim 2, characterized in that, The cylindrical block (10), lifting rod (11) and circular sealing block (13) are integrally cast and are all made of hard alloy.

6. The multi-cavity injection molding apparatus for pipe fitting production according to claim 1, characterized in that, The cooling mechanism includes an annular cooling cavity (19) arranged around the mold groove (2). A circulating cooling pipe (20) is connected to the top surface of the annular cooling cavity (19). Mounting brackets (21) are fixedly connected to the left and right side walls near the upper end of the mold base (1). Small fans (22) are fixedly installed on the upper ends of the two mounting brackets (21).

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