Die-pressing elbow die and equipment thereof

Abstract

The invention relates to the technical field of elbow forming dies, in particular to a die-pressing elbow die and equipment thereof.The die comprises an outer die shell, a die core, a feeding cylinder and a plugging die, the die core comprises connecting flange heads located at the top end and the bottom end, and a plurality of shrimp bending die cores are arranged between the upper connecting flange head and the lower connecting flange head; flange rings are arranged on the inner walls of openings in the two ends of the connecting flange head and the mitre bend mold cores, a plurality of positioning screw holes are distributed in the flange rings at equal angles, every two adjacent mitre bend mold cores are positioned by inserting a plurality of bolts into the positioning screw holes of the flange rings, and locking nuts are installed on the bolts. According to the technical scheme, the number of the mitre bend mold cores is designed to obtain the elbow pipes with the same center circle, the same radius and different bending angles, and the problems that in the manufacturing process of the large-diameter elbow pipes, the wall thickness is not uniform, and demolding is difficult are solved.

Description

Technical Field

[0001] The invention relates to the technical field of elbow forming dies, and in particular to a molded elbow die and equipment thereof. Background Art

[0002] The mold core of the traditional molded elbow is only suitable for small-diameter molding. Large-diameter molding will make demoulding difficult. In addition, the mold core during the molding of large-diameter elbows will cause the lining layer to deviate from the wall due to excessive pressure. The plate-pasting process is only suitable for working conditions below 180°C, which is not suitable for the ambient temperature of the pipeline this time. In addition, the material utilization rate and finished product finish of the plate-pasting process are significantly lower than those of the PFA molding process.

[0003] Existing PFA elbows are generally formed by bending and welding a PFA tube, such as a forming mold disclosed in Chinese patent CN204019838U, which includes a metal elbow, inner flanges are respectively provided at the open ends of the metal elbow, outer flanges matching the inner flanges are respectively provided outside the open ends of the metal elbow, a mold core is coaxially provided inside the metal elbow, both ends of the mold core extend outward and are embedded in the corresponding outer flanges, and the outer flange, the metal elbow and the mold core together enclose a PFA layer molding cavity.

[0004] However, the shapes of the elbow and the mold core are fixed, so multiple molds are needed to produce elbows with the same center circle and radius but different angles, which is costly. In addition, offset and multi-angle forming may occur during the molding operation, which may lead to difficulty in demolding after the molding operation. The stability and breadth of the molding operation have a certain range of improvement. Summary of the invention

[0005] In view of the above problems, it is necessary to provide a die and equipment for a pressed elbow to solve the problems in the prior art.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0007] A molded elbow mold, including an outer mold shell and a mold core, a feeding cylinder arranged at the top openings of the outer mold shell and the mold core, and a sealing mold arranged at the bottom openings of the outer mold shell and the mold core, the mold core includes connecting flange heads located at the top and bottom ends, a plurality of shrimp bend mold cores are arranged between the upper and lower connecting flange heads, the shrimp bend mold cores have the same curvature, flange rings are arranged on the inner walls of the openings at both ends of the connecting flange heads and the shrimp bend mold cores, a plurality of positioning screw holes are distributed at equal angles on the flange rings, two adjacent shrimp bend mold cores are positioned by inserting a plurality of bolts in the positioning screw holes of the flange rings, locking nuts are installed on the bolts, and the bolts cooperate with the locking nuts to lock the adjacent connecting flange heads and shrimp bend mold cores.

[0008] A molded elbow device comprises a molded elbow mold and a frame, wherein the outer mold shell is formed by splicing a fixed mold shell and a movable mold shell on the left and right, the fixed mold shell and the movable mold shell are respectively fixedly mounted on a support frame, the support frame connected to the fixed mold shell is fixedly mounted on the frame, the support frame connected to the movable mold shell is slidably mounted on a limiting slide rail of the frame, the mold core is arranged in the fixed mold shell and the center of curvature overlaps with the fixed mold shell; a positioning bending shaft is arranged on the frame, the positioning bending shaft has the same curvature as the mold core, the positioning bending shaft is inserted into a sleeve arranged at the axis of the connecting flange head at both ends of the mold core, a limiting head is arranged at the bottom end of the positioning bending shaft, the limiting head is fixedly connected to the sleeve of the connecting flange head at the bottom of the mold core, and a lifting drive unit is arranged on the frame for driving the positioning bending shaft to rotate around the center of curvature of the mold core, the lifting drive unit drives the positioning bending shaft to pull the mold core to change its position in the outer mold shell.

[0009] Preferably, an extension plate extending to the top of the mold core is provided on the top of the positioning bending shaft, and a first limiting waist-shaped hole is provided on the extension plate. The first limiting waist-shaped hole has the same curvature as the mold core, and the centers of curvature of the first limiting waist-shaped hole and the mold core are on the same horizontal straight line; a limiting block is fixedly installed on the top of the frame, and the limiting block is inserted in the first limiting waist-shaped hole, and the limiting block fits the inner wall of the first limiting waist-shaped hole.

[0010] Preferably, the extension plate is provided with a horizontally extending plug shaft, and the lifting drive unit includes a lifting frame slidably mounted on the frame, and the lifting frame is provided with a horizontally extending second limiting waist-shaped hole, and the length direction of the second limiting waist-shaped hole is perpendicular to the rotation axis of the positioning bent shaft, and the plug shaft is inserted in the second limiting waist-shaped hole; the lifting drive unit also includes at least one linear drive fixedly mounted on the frame, and the working end of the linear drive is arranged to move in the vertical direction, and the working end of the linear drive is fixedly connected to the lifting frame.

[0011] Preferably, the diameter of the insertion shaft is the same as the width of the second limiting waist-shaped hole.

[0012] Preferably, limit sliders are fixedly installed at both ends of the lifting frame, and two vertically extending longitudinal slide rails are provided on the frame, and the limit sliders are slidably installed in the longitudinal slide rails.

[0013] Preferably, the top of the longitudinal slide rail is connected through a horizontal top plate, the linear drive is fixedly mounted on the top plate, the top plate is located above the limit block, and an avoidance hole for avoiding the extension plate is provided on the top plate.

[0014] Preferably, a plurality of positioning inserts are provided on the support frame for installing the fixed mold shell, and the positioning inserts are horizontally arranged along the length direction of the limiting slide rail; a positioning rod which is in the same straight line as the positioning inserts is provided on the support frame for installing the movable mold shell, and the positioning rod is inserted in the positioning inserts.

[0015] Preferably, a vertically extending push plate is fixedly installed on the side of the support frame for installing the movable mold shell away from the fixed mold shell, and a plurality of guide rods extending along the length direction of the limiting slide rail are provided on the push plate. The guide rods are inserted into the side plates on the side of the frame, and a limiting plate is installed on the end of the guide rod located on the side plate away from the outer mold shell; a spring is sleeved on each guide rod, and the spring elastically connects the side plate and the limiting plate, and the elastic force of the spring causes the support frame for installing the movable mold shell to move toward the side away from the fixed mold shell.

[0016] Preferably, the lifting frame is provided with a connecting frame extending to the top of the push plate, and a lower top block extending downward is fixedly installed on the connecting frame; the top of the push plate is provided with a first inclined surface, and the bottom end of the lower top block is provided with a second inclined surface that fits the first inclined surface. When the lifting frame moves downward, the lower top block is inserted between the push plate and the side plate so that the movable mold shell fits the fixed mold shell to form an outer mold shell.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Firstly, the elbow mould in the present invention is formed by connecting the flange head and a plurality of shrimp bend mould cores. The existence of the shrimp bend mould core enables the mould to obtain elbow pipes with the same centre circle, the same radius but different bending angles by designing the number of shrimp bend mould cores, opening up a precedent for the production of large-diameter elbow pipes, solving the problems of uneven wall thickness and difficulty in demolding that may occur during the production of large-diameter elbow pipes, and avoiding the possibility of elbow pipe deflection and multi-angle forming, thereby improving the stability and extensiveness of elbow pipe production.

[0019] Secondly, the outer mold shell in the present invention is formed by splicing a fixed mold shell and a movable mold shell, and the positioning bending shaft on the frame is inserted into the shaft sleeves of the connecting flange heads at both ends of the mold core. Therefore, after the elbow tube is formed, the movable mold shell can be separated from the fixed mold shell and thus separated from the outer wall of the elbow, and the mold core can be rotated around the center of the curvature circle driven by the frame, and separated from the inner wall of the elbow without hitting the inner wall of the elbow, which is convenient for demolding and unloading.

[0020] Thirdly, the lifting drive unit in the present invention can drive the positioning bending shaft and the mold core to move while cooperating with the spring to drive the support frame on which the movable mold shell is installed to move synchronously, so that when the mold core moves down into the interior of the outer mold shell, the fixed mold shell and the movable mold shell are automatically spliced ​​to form an outer mold shell, and when the mold core moves up and demolds the elbow, the movable mold shell automatically moves away from the fixed mold shell for demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the core of a molded elbow mold;

[0022] Figure 2 The present invention is a cross-sectional view of a core of a molded elbow mold;

[0023] Figure 3 yes Figure 2 A local enlarged view of point A;

[0024] Figure 4 It is a stereoscopic diagram of a molded elbow device in a first working state;

[0025] Figure 5 It is a side view of a molded elbow device in a first working state;

[0026] Figure 6 yes Figure 5 A cross-sectional view of the section at BB;

[0027] Figure 7 It is a stereoscopic diagram of a molded elbow device in a second working state;

[0028] Figure 8 yes Figure 7 A partial enlarged view of point C;

[0029] Fig. 9 It is a side view of a molded elbow device in the second working state;

[0030] Fig.10 yes Fig. 9 Cross-sectional view at DD of FIG.

[0031] Fig.11 yes Fig. 9 A three-dimensional cross-sectional view at DD.

[0032] The numbers in the figure are: 1, outer mold shell; 11, fixed mold shell; 12, movable mold shell; 13, support frame; 131, positioning plug cylinder; 132, positioning plug rod; 133, push plate; 134, guide rod; 135, limit plate; 136, spring; 137, first inclined surface; 2, mold core; 21, connecting flange head; 211, shaft sleeve; 22, shrimp bend mold core; 221, flange ring; 222, positioning screw hole; 223, bolt; 224, locking nut; 3, feeding cylinder; 4, sealing Plug the mold; 5. Rack; 51. Limit slide rail; 52. Positioning bent shaft; 521. Limit head; 522. Extension plate; 523. First limit waist-shaped hole; 524. Insert shaft; 53. Limit block; 54. Longitudinal slide rail; 55. Top plate; 551. Avoidance hole; 56. Side plate; 6. Lifting drive unit; 61. Lifting frame; 611. Second limit waist-shaped hole; 612. Limit slider; 613. Connecting frame; 614. Lower top block; 615. Second inclined surface; 62. Linear drive. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Reference Figures 1 to 11 :

[0035] A molded elbow mold, including an outer mold shell 1 and a mold core 2, a feeding cylinder 3 arranged at the top openings of the outer mold shell 1 and the mold core 2, and a sealing mold 4 arranged at the bottom openings of the outer mold shell 1 and the mold core 2, the mold core 2 includes a connecting flange head 21 located at the top and the bottom, a plurality of shrimp bend mold cores 22 are arranged between the upper and lower connecting flange heads 21, the shrimp bend mold cores 22 have the same curvature, and flange rings 221 are arranged on the inner walls of the openings at both ends of the connecting flange head 21 and the shrimp bend mold core 22, and a plurality of positioning screw holes 222 are distributed at equal angles on the flange ring 221, and two adjacent shrimp bend mold cores 22 are positioned by inserting a plurality of bolts 223 in the positioning screw holes 222 of the flange ring 221, and a locking nut 224 is installed on the bolt 223, and the bolt 223 cooperates with the locking nut 224 to lock the adjacent connecting flange heads 21 and the shrimp bend mold core 22.

[0036] The molded elbow mold in the present application includes an outer mold shell 1 and a mold core 2. The feeding cylinder 3 and the sealing mold 4 seal the top and bottom of the outer mold shell 1 and the mold core 2. The feeding cylinder 3 injects material into the outer mold shell 1 and the mold core 2 to form a large-diameter elbow. The mold core 2 in this embodiment is formed by splicing multiple sections of shrimp bend mold cores 22. The shrimp bend mold cores 22 can be formed by CNC processing. The adjacent shrimp bend mold cores 22 are aligned by flange rings 221. After the flange rings 221 are aligned, the positioning screw holes 222 on the flange rings 221 are in On the same straight line, the staff can insert the bolt 223 into the positioning screw hole 222 and cooperate with the locking nut 224 to accurately splice the shrimp bend mold core 22, and then connect the shrimp bend mold core 22 to the connecting flange heads 21 at both ends. The flange ring 221 is located on the inner wall of the connecting flange head 21 and the shrimp bend mold core 22. Therefore, the spliced ​​mold core 2 has a smooth outer wall, ensuring that the surface of the bent pipe after forming is smooth, and after the bent pipe is formed, the staff can disassemble the shrimp bend mold core 22 by removing the bolt 223 when demolding. The existence of the shrimp bend mold core 22 in the present technical solution allows the mold to be designed with the number of shrimp bend mold cores 22 to obtain elbow pipes with the same center circle and radius but different bending angles, opening up a precedent for the production of large-diameter elbow pipes, solving the problems of uneven wall thickness and difficulty in demolding that may occur in the production process of large-diameter elbow pipes, and avoiding the possibility of elbow pipe deflection and multi-angle forming, thereby improving the stability and extensiveness of elbow pipe production.

[0037] A molded elbow device includes a molded elbow mold and a frame 5. The outer mold shell 1 is formed by splicing a fixed mold shell 11 and a movable mold shell 12 on the left and right. The fixed mold shell 11 and the movable mold shell 12 are respectively fixedly installed on a support frame 13 (such as Fig. 9As shown), a support frame 13 connected to the fixed mold shell 11 is fixedly installed on the frame 5, and a support frame 13 connected to the movable mold shell 12 is slidably installed on the limiting slide rail 51 of the frame 5, and the core 2 is arranged in the fixed mold shell 11 and the center of curvature overlaps with the fixed mold shell 11; a positioning bent shaft 52 is arranged on the frame 5, and the positioning bent shaft 52 has the same curvature as the core 2. The positioning bent shaft 52 is inserted into the shaft sleeve 211 arranged at the axis of the connecting flange head 21 at both ends of the core 2, and a limiting head 521 is arranged at the bottom end of the positioning bent shaft 52. The limiting head 521 is fixedly connected to the shaft sleeve 211 of the connecting flange head 21 at the bottom of the core 2, and a lifting drive unit 6 is arranged on the frame 5 for driving the positioning bent shaft 52 to rotate around the center of curvature of the core 2. The lifting drive unit 6 drives the positioning bent shaft 52 to pull the core 2 to change its position in the outer mold shell 1.

[0038] The elbow equipment in the present application includes an elbow mold composed of an outer mold shell 1, a mold core 2, a feeding cylinder 3 and a sealing mold 4. A limiting slide rail 51 is arranged on the frame 5. Two support frames 13 on the limiting slide rail 51 are installed, one at a fixed position and the other at a sliding position. The outer mold shell 1 is cut longitudinally to form a fixed mold shell 11 and a movable mold shell 12. The fixed mold shell 11 and the movable mold shell 12 are respectively installed on the support frame 13. The fixed mold shell 11 keeps a fixed position, and the movable mold shell 12 can follow the support frame 13 to move on the limiting slide rail 51 to be spliced ​​or moved away from the fixed mold shell 11. The mold core 2 is located in the fixed mold shell 11 to maintain the same center circle. The mold core 2 is located at the center of the connecting flange heads 21 at both ends of the mold core 2 and is provided with a shaft sleeve 211. The positioning bent shaft 52 having the same curvature as the mold core 2 is inserted into the shaft sleeve 211 of the connecting flange heads 21 at both ends of the mold core 2. The limit head 521 at the bottom of the positioning bent shaft 52 is fixedly connected to the shaft sleeve 211 of the connecting flange head 21 at the bottom of the mold core 2. Therefore, when the lifting drive unit 6 on the frame 5 drives the positioning bent shaft 52 to rotate around the center of the curvature of the mold core 2, the mold core 2 can be driven to rotate synchronously. When the staff is adjusting the elbow During production, the fixed mold shell 11 and the movable mold shell 12 are spliced ​​together to form an outer mold shell 1, and the mold core 2 is located inside the outer mold shell 1. After installing the feeding cylinder 3 and the sealing mold 4, the raw material is injected into the outer mold shell 1 and the mold core 2 through the feeding cylinder 3. When the elbow is formed, the staff can remove the sealing mold 4 and drive the mold core 2 to rotate around the center of the curvature through the lifting drive unit 6. At the same time, the support frame 13 on which the movable mold shell 12 is installed drives the movable mold shell 12 to separate from the fixed mold shell 11, so that the mold core 2 and the movable mold shell 12 are separated from the surface of the formed elbow, which is convenient for subsequent demolding.

[0039] In order to solve the problem of how to ensure that the positioning bending shaft 52 can drive the mold core 2 to rotate around the center of the curvature when it moves, the following features are specifically set:

[0040] An extension plate 522 extending to the top of the mold core 2 is arranged on the top of the positioning bending axis 52, and a first limiting waist-shaped hole 523 is arranged on the extension plate 522. The first limiting waist-shaped hole 523 has the same curvature as the mold core 2, and the curvature centers of the first limiting waist-shaped hole 523 and the mold core 2 are on the same horizontal straight line; a limiting block 53 is fixedly installed on the top of the frame 5, and the limiting block 53 is inserted in the first limiting waist-shaped hole 523, and the limiting block 53 fits the inner wall of the first limiting waist-shaped hole 523.

[0041] The positioning bent shaft 52 in this embodiment is extended to the extension plate 522 at the top of the mold core 2 and is provided with a first limiting waist-shaped hole 523. The limiting block 53 provided at the top of the frame 5 is inserted into the first limiting waist-shaped hole 523 of the extension plate 522. Since the first limiting waist-shaped hole 523 has the same curvature as the mold core 2 and the limiting block 53 fits the inner wall of the first limiting waist-shaped hole 523, the limiting block 53 can limit the movement of the positioning bent shaft 52. The position of the limiting block 53 is fixed. During the movement of the positioning bent shaft 52, the limiting block 53 3 moves in the first limiting waist-shaped hole 523, so that the positioning bent shaft 52 can rotate around the center of curvature of the mold core 2, ensuring that the mold core 2 can move in contact with the inner wall of the elbow, and the elbow will not be squeezed during the movement. The mold core 2 and the inner wall of the elbow can move relative to each other to facilitate demoulding of the elbow. In this embodiment, when the positioning bent shaft 52 rotates downward to the top of the first limiting waist-shaped hole 523 and fits the limiting block 53, the mold core 2 moves down to the lowest position and is located in the outer mold shell 1, which is convenient for accurately positioning the position of the mold core 2 in the outer mold shell 1.

[0042] In order to solve the problem of how the lifting drive unit 6 drives the positioning bent shaft 52 to move, the following features are specifically set:

[0043] The extension plate 522 is provided with a horizontally extending insertion shaft 524 (such as Figure 8 As shown), the lifting drive unit 6 includes a lifting frame 61 slidably mounted on the frame 5, and a second limiting waist-shaped hole 611 extending horizontally is provided on the lifting frame 61. The length direction of the second limiting waist-shaped hole 611 is perpendicular to the rotation axis of the positioning bent shaft 52, and the insertion shaft 524 is inserted in the second limiting waist-shaped hole 611; the lifting drive unit 6 also includes at least one linear drive 62 fixedly mounted on the frame 5, and the working end of the linear drive 62 is set to move in the vertical direction, and the working end of the linear drive 62 is fixedly connected to the lifting frame 61.

[0044] The lifting drive unit 6 in this embodiment drives the lifting frame 61 to move in the vertical direction through the linear driver 62. The plug shafts 524 set on both sides of the extension plate 522 are inserted into the second limiting waist-shaped holes 611 set on the lifting frame 61. When the linear driver 62 drives the lifting frame 61 to move upward, the second limiting waist-shaped hole 611 drives the plug shaft 524 to move upward, so that the positioning bent shaft 52 drives the mold core 2 to rotate under the limitation of the limiting block 53. At this time, the plug shaft 524 can move and change its position in the second limiting waist-shaped hole 611 to ensure smooth rotation of the positioning bent shaft 52. The linear driver 62 in this embodiment can be a cylinder, an oil cylinder or an electric push rod, etc.

[0045] In order to solve the problem of how to ensure the stable rotation of the positioning bending shaft 52 when the lifting frame 61 moves upward, the following features are specifically set:

[0046] The diameter of the inserting shaft 524 is the same as the width of the second limiting waist-shaped hole 611 .

[0047] The diameter of the plug shaft 524 in this embodiment is the same as the width of the second limiting waist-shaped hole 611, so the plug shaft 524 can move stably in the second limiting waist-shaped hole 611. When the positioning bent shaft 52 rotates, the second limiting waist-shaped hole 611 limits the plug shaft 524, and the limiting block 53 limits the positioning bent shaft 52 in the first limiting waist-shaped hole 523, thereby ensuring the stability of the positioning bent shaft 52 during rotation, thereby ensuring the stable movement of the mold core 2 and avoiding the mold core 2 from hitting the inner wall of the elbow pipe.

[0048] In order to solve the problem of how to ensure the stable movement of the lifting frame 61 in the vertical direction, the following features are specifically set:

[0049] The two ends of the lifting frame 61 are fixedly installed with limit sliders 612 (such as Figure 6 As shown), the frame 5 is provided with two vertically extending longitudinal slide rails 54, and the limiting slider 612 is slidably installed in the longitudinal slide rails 54.

[0050] The top of the longitudinal slide rail 54 is connected through a horizontal top plate 55 , and the linear driver 62 is fixedly mounted on the top plate 55 . The top plate 55 is located above the limit block 53 , and an avoidance hole 551 for avoiding the extension plate 522 is provided on the top plate 55 .

[0051] The frame 5 in this embodiment is provided with a longitudinal slide rail 54. Both ends of the lifting frame 61 are slidably installed in the longitudinal slide rail 54 through limit sliders 612 to keep the lifting frame 61 in a stable horizontal state when it moves in the vertical direction. The linear drive 62 is installed on the top plate 55 at the top of the longitudinal slide rail 54. When the linear drive 62 drives the lifting frame 61 to move, the positioning bent shaft 52 rotates. During the rotation and upward movement of the positioning bent shaft 52, the extension plate 522 can pass through the avoidance hole 551 on the top plate 55 to ensure the moving range of the positioning bent shaft 52 and the core 2.

[0052] In order to solve the problem of how to automatically change the splicing state of the fixed mold shell 11 and the movable mold shell 12 when the lifting drive unit 6 drives the mold core 2 to rotate, the following features are specifically set:

[0053] A plurality of positioning inserts 131 are provided on the support frame 13 for installing the fixed mold shell 11, and the positioning inserts 131 are horizontally arranged along the length direction of the limiting slide rail 51; a positioning rod 132 which is in the same straight line as the positioning inserts 131 is provided on the support frame 13 for installing the movable mold shell 12, and the positioning rod 132 is inserted in the positioning inserts 131.

[0054] A vertically extending push plate 133 is fixedly installed on the side of the support frame 13 for installing the movable mold shell 12 away from the fixed mold shell 11. The push plate 133 is provided with a plurality of guide rods 134 (such as Figure 7 As shown), the guide rod 134 is inserted into the side plate 56 on the side of the frame 5, and the guide rod 134 is located at the end of the side plate 56 away from the outer mold shell 1 and a limit plate 135 is installed; each guide rod 134 is provided with a spring 136, and the spring 136 elastically connects the side plate 56 and the limit plate 135. The elastic force of the spring 136 causes the support frame 13 on which the movable mold shell 12 is installed to move to the side away from the fixed mold shell 11.

[0055] The lifting frame 61 is provided with a connecting frame 613 extending to the top of the push plate 133, and a lower top block 614 extending downward is fixedly installed on the connecting frame 613; the top of the push plate 133 is provided with a first inclined surface 137, and the bottom of the lower top block 614 is provided with a second inclined surface 615 that fits the first inclined surface 137. When the lifting frame 61 moves downward, the lower top block 614 is inserted between the push plate 133 and the side plate 56 to make the movable mold shell 12 fit the fixed mold shell 11 to form an outer mold shell 1.

[0056] The lifting frame 61 in this embodiment is connected to the lower top block 614 through the connecting frame 613. When the lifting frame 61 moves, it drives the lower top block 614 to move synchronously in the vertical direction. When the lifting frame 61 moves downward to allow the mold core 2 to enter the outer mold shell 1, the lower top block 614 moves downward and is inserted between the support frame 13 on which the movable mold shell 12 is installed and the side plate 56 of the frame 5, and the second inclined surface 615 at the bottom of the lower top block 614 fits the first inclined surface 137 of the push plate 133 on the support frame 13, so that the lower top block 614 moves downward to push the support frame 13 on which the movable mold shell 12 is installed to approach the mold core 2. After the side of the lower top block 614 facing the support frame 13 fits the vertical surface of the push plate 133, the fixed mold shell 11 and the movable mold shell 12 are fixed. The shell 12 is fitted and spliced ​​to form the outer mold shell 1. At this time, the lifting frame 61 can continue to move down to the limit block 53 to fit the top of the first limit waist-shaped hole 523, so that the mold core 2 is located in the outer mold shell 1, and the assembly of the elbow mold is completed. In the process of the mobile mold shell 12 approaching the fixed mold shell 11, the support frame 13 installed with the mobile mold shell 12 compresses the spring 136 on the guide rod 134. When the linear drive 62 drives the lifting frame 61 to move up for demolding, the lower top block 614 is separated from the push plate 133 and the side plate 56. The support frame 13 installed with the mobile mold shell 12 drives the mobile mold shell 12 away from the fixed mold shell 11 under the elastic force of the spring 136, so that the mobile mold shell 12 is separated from the outer wall of the elbow tube, achieving the effect of automatic demolding.

[0057] Working principle: When the staff is making the elbow, the fixed mold shell 11 and the movable mold shell 12 are spliced ​​to form an outer mold shell 1, and the mold core 2 is located in the outer mold shell 1. After installing the feeding cylinder 3 and the plugging mold 4, the raw material is injected into the outer mold shell 1 and the mold core 2 through the feeding cylinder 3. After the elbow is formed, the lifting drive unit 6 drives the lifting frame 61 to move in the vertical direction through the linear drive 62, and the plug shafts 524 set on both sides of the extension plate 522 are inserted into the second limiting waist-shaped holes 611 set on the lifting frame 61, so that the positioning bending shaft 52 moves with the lifting frame 61, and the positioning During the movement of the bending shaft 52, the limit block 53 moves in the first limit waist-shaped hole 523, thereby causing the positioning bending shaft 52 to rotate around the center of curvature of the mold core 2, ensuring that the mold core 2 can move in contact with the inner wall of the elbow, so that the mold core 2 and the movable mold shell 12 are separated from the formed elbow surface. At the same time, the lower top block 614 is separated from between the push plate 133 and the side plate 56, and the support frame 13 on which the movable mold shell 12 is installed drives the movable mold shell 12 away from the fixed mold shell 11 under the elastic force of the spring 136, so that the movable mold shell 12 is separated from the outer wall of the elbow tube, which is convenient for subsequent demolding.

[0058] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A molded elbow mold, comprising an outer mold shell (1) and a mold core (2), a feeding cylinder (3) arranged at the top openings of the outer mold shell (1) and the mold core (2), and a blocking mold (4) arranged at the bottom openings of the outer mold shell (1) and the mold core (2), characterized in that: The mold core (2) includes a connecting flange head (21) located at the top and the bottom, and a plurality of shrimp-bend mold cores (22) are arranged between the upper and lower connecting flange heads (21). The shrimp-bend mold cores (22) have the same curvature. Flange rings (221) are arranged on the inner walls of the openings at both ends of the connecting flange head (21) and the shrimp-bend mold core (22). A plurality of positioning screw holes (222) are distributed at equal angles on the flange ring (221). Two adjacent shrimp-bend mold cores (22) are positioned by being inserted into the positioning screw holes (222) of the flange ring (221) through a plurality of bolts (223). A locking nut (224) is installed on the bolt (223). The bolt (223) cooperates with the locking nut (224) to lock the adjacent connecting flange heads (21) and the shrimp-bend mold core (22).

2. A molded elbow device, comprising a molded elbow mold as claimed in claim 1, and a frame (5), characterized in that: The outer mold shell (1) is formed by splicing a fixed mold shell (11) and a movable mold shell (12) on the left and right. The fixed mold shell (11) and the movable mold shell (12) are respectively fixedly mounted on a support frame (13). The support frame (13) connected to the fixed mold shell (11) is fixedly mounted on a frame (5). The support frame (13) connected to the movable mold shell (12) is slidably mounted on a limit slide rail (51) of the frame (5). The mold core (2) is arranged in the fixed mold shell (11) and the center of curvature overlaps with the fixed mold shell (11). A positioning bent shaft (52) is arranged on the frame (5), the positioning bent shaft (52) has the same curvature as the mold core (2), the positioning bent shaft (52) is inserted into a shaft sleeve (211) arranged at the axis of the connecting flange heads (21) at both ends of the mold core (2), a limiting head (521) is arranged at the bottom end of the positioning bent shaft (52), the limiting head (521) is fixedly connected to the shaft sleeve (211) of the connecting flange head (21) at the bottom of the mold core (2), and a lifting drive unit (6) is arranged on the frame (5) for driving the positioning bent shaft (52) to rotate around the center of curvature of the mold core (2), and the lifting drive unit (6) drives the positioning bent shaft (52) to pull the mold core (2) to change its position in the outer mold shell (1).

3. A molded elbow device according to claim 2, characterized in that: An extension plate (522) extending to the top of the mold core (2) is arranged at the top of the positioning bending shaft (52), and a first limiting waist-shaped hole (523) is arranged on the extension plate (522). The first limiting waist-shaped hole (523) has the same curvature as the mold core (2), and the curvature centers of the first limiting waist-shaped hole (523) and the mold core (2) are on the same horizontal straight line; A limit block (53) is fixedly mounted on the top of the frame (5); the limit block (53) is inserted into the first limit waist-shaped hole (523); the limit block (53) fits the inner wall of the first limit waist-shaped hole (523).

4. A molded elbow device according to claim 3, characterized in that: The extension plate (522) is provided with a horizontally extending insertion shaft (524); the lifting drive unit (6) comprises a lifting frame (61) slidably mounted on the frame (5); the lifting frame (61) is provided with a horizontally extending second position-limiting waist-shaped hole (611); the length direction of the second position-limiting waist-shaped hole (611) is perpendicular to the rotation axis of the positioning bending shaft (52); and the insertion shaft (524) is inserted into the second position-limiting waist-shaped hole (611); The lifting drive unit (6) also includes at least one linear drive (62) fixedly mounted on the frame (5), wherein a working end of the linear drive (62) is arranged to move in a vertical direction, and the working end of the linear drive (62) is fixedly connected to the lifting frame (61).

5. A molded elbow device according to claim 4, characterized in that: The diameter of the inserting shaft (524) is the same as the width of the second limiting waist-shaped hole (611).

6. A molded elbow device according to claim 4, characterized in that: Limiting slide blocks (612) are fixedly mounted at both ends of the lifting frame (61), and two vertically extending longitudinal slide rails (54) are arranged on the frame (5), and the limiting slide blocks (612) are slidably mounted in the longitudinal slide rails (54).

7. A molded elbow device according to claim 6, characterized in that: The top of the longitudinal slide rail (54) is connected via a horizontal top plate (55), the linear drive (62) is fixedly mounted on the top plate (55), the top plate (55) is located above the limit block (53), and a avoidance hole (551) for avoiding the extension plate (522) is provided on the top plate (55).

8. The molded elbow equipment according to claim 2, characterized in that: A plurality of positioning inserts (131) are arranged on a support frame (13) for mounting and fixing the mold shell (11), and the positioning inserts (131) are arranged horizontally along the length direction of the limiting slide rail (51); A positioning rod (132) which is in the same straight line as the positioning insert cylinder (131) is arranged on the support frame (13) for mounting the movable mold shell (12), and the positioning rod (132) is inserted into the positioning insert cylinder (131).

9. The molding elbow equipment according to claim 4, characterized in that: A vertically extending push plate (133) is fixedly installed on one side of the support frame (13) on which the movable mold shell (12) is installed, away from the fixed mold shell (11); a plurality of guide rods (134) extending along the length direction of the limiting slide rail (51) are arranged on the push plate (133); the guide rods (134) are inserted into the side plate (56) on the side of the frame (5); a limiting plate (135) is installed at one end of the guide rod (134) located on the side plate (56) away from the outer mold shell (1); A spring (136) is sleeved on each guide rod (134), and the spring (136) is elastically connected to the side plate (56) and the limit plate (135). The elastic force of the spring (136) causes the support frame (13) on which the movable mold shell (12) is installed to move to a side away from the fixed mold shell (11).

10. A molded elbow device according to claim 9, characterized in that: The lifting frame (61) is provided with a connecting frame (613) extending to the top of the push plate (133), and a lower top block (614) extending downward is fixedly mounted on the connecting frame (613); The top end of the push plate (133) is provided with a first inclined surface (137), and the bottom end of the lower top block (614) is provided with a second inclined surface (615) that fits the first inclined surface (137). When the lifting frame (61) moves downward, the lower top block (614) is inserted between the push plate (133) and the side plate (56) so that the movable mold shell (12) fits the fixed mold shell (11) to form an outer mold shell (1).

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