A powder component composite pressing system and molding method

Abstract

The present invention discloses a powder component composite pressing system and a molding method. The powder component composite pressing system includes a first pressing and molding unit, a transfer unit, and a second pressing and molding unit. The first pressing and molding unit is used for pre-pressing Class A materials, the rectifying slide is used for transferring the preformed products after pressing, the transfer unit includes a conveyor belt and a manipulator, the conveyor belt is used for screening and transferring the preformed products; the second pressing and molding unit is used for composite pressing of Class A material preforms and Class B materials. According to the powder component composite pressing system and molding method of the present invention, Class A materials with low molding process difficulty are pressed by the first pressing and molding unit, and then transferred to the second pressing and molding unit by the transfer unit, and composite pressed together with Class B materials, so as to realize the processing of pressed products of different materials, with high production efficiency and low production cost.

Description

Technical Field

[0001] The invention relates to the technical field of powder molding, and in particular to a powder component composite pressing system and a molding method. Background Art

[0002] Due to the demand for various performance of parts in modern industry, different powders are usually pressed into various parts and then combined to meet the demand. Due to the differences in fluidity and particle size of different powders, they cannot be processed at the same time.

[0003] In the prior art, composite pressing of two different powders, such as Class A material and Class B material, is usually achieved by batch loading and pressing in the same pressing equipment. However, there are problems such as poor stability, extremely low efficiency, and high unit production cost during industrial mass production.

[0004] Another processing method is to press Class A materials and Class B materials separately on different assembly lines and then assemble them into one. However, this processing method not only has a large assembly workload, but also requires multiple assembly lines, resulting in high production costs. At the same time, thin-walled ring-shaped parts are fragile during logistics turnover, which reduces the yield rate of parts.

[0005] Chinese patent CN105023743B proposes a method for manufacturing a composite structure iron powder core blank and a method for manufacturing a composite structure iron powder core. This method uses the same pressing equipment for multiple pressings, which has the problems of low efficiency, poor stability, and high production cost. Summary of the invention

[0006] The present invention aims to provide a powder component composite pressing system and a molding method to achieve composite pressing of different materials and solve the problems of poor composite pressing stability and low production efficiency.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A powder component composite pressing system comprises: a first pressing and molding unit, a transfer unit, and a second pressing and molding unit.

[0009] The first pressing and forming unit comprises a first hydraulic press, a first die frame, a first die and a rectifying slideway, the first pressing and forming unit is used for pre-pressing the Class A material, and the rectifying slideway is used for transferring the preformed product after pressing;

[0010] A transfer unit, the transfer unit comprising a conveyor belt and a manipulator, the conveyor belt being used for screening and transferring the preforms;

[0011] The second pressing and forming unit comprises a second hydraulic press, a second die frame and a second die, and the second pressing and forming unit is used for composite pressing of the preform of the type A material and the type B material.

[0012] In some embodiments, the first pressing unit includes a first hydraulic press, a first die frame, a first mold and a rectifier slideway, the first die frame includes a first upper die plate, a first female die plate, a first female die plate guide column, a lower ram pad, a first fixed lower ram plate, and a first core plate, the first upper die plate, the first female die plate, the lower ram pad, the first fixed lower ram plate, and the first core plate are sequentially spaced from top to bottom and are all connected to the first hydraulic press, the two ends of the first female die plate guide column are respectively connected to the first female die plate and the first core plate, and the first mold includes A first upper pressure head, a first die sleeve, a quick-change sliding sleeve, a first outer lower pressure head, a first inner lower pressure head, and a first core rod. The first upper pressure head is fixedly connected to the lower end surface of the first upper mold plate. The first die sleeve and the quick-change sliding sleeve are detachably connected to the first female mold plate. The first outer lower pressure head is arranged on the lower pressure head pad. The inner lower pressure head is arranged on the first fixed lower pressure head plate. The first core rod is arranged on the first core rod plate. The lower pressure head auxiliary cylinder is used to control the movement of the first outer lower pressure head and the first inner lower pressure head. One end of the rectifier slide is connected to the first female mold plate and is arranged obliquely.

[0013] In some embodiments, the second pressing unit includes a second hydraulic press, a second die frame and a second mold, the second die frame includes a second upper mold plate, a second female mold plate, a second female mold plate guide column, a second fixed lower press head plate, a second core rod plate, and a lower mold plate, the second upper mold plate, the second female mold plate, the second fixed lower press head plate, the second core rod plate and the lower mold plate are spaced from top to bottom and are all fixedly connected to the second hydraulic press, the two ends of the second female mold plate guide column are respectively connected to the second female mold plate and the second core rod plate, the second mold includes a second upper press head, a second mold sleeve, a quick-change sliding sleeve, a second lower press head, and a second core rod, the second upper press head is arranged on the second upper mold plate, the second mold sleeve and the quick-change sliding sleeve are detachably connected to the second female mold plate, the second lower press head is arranged on the second fixed lower press head plate, and the second core rod is arranged on the second core rod plate.

[0014] In some embodiments, the first hydraulic press is provided with a main cylinder and an auxiliary cylinder, the main cylinder is used to control the first upper mold plate and the first core plate, and the auxiliary cylinder is used to control the lower pressure head pad, thereby controlling the first outer lower pressure head.

[0015] In some embodiments, the second hydraulic press has a main cylinder and a center cylinder. The main cylinder is used to control the second upper mold plate and the lower mold plate, and the center cylinder is used to control the second core plate.

[0016] In some embodiments, the quick-change sliding sleeve includes an inner sleeve, an outer sleeve, and a limiting ball. The inner sleeve is arranged in the outer sleeve. The outer diameter of the first mold sleeve or the second mold sleeve matches the inner sleeve. A limiting groove is provided on the outer side of the first mold sleeve or the second mold sleeve, and the limiting ball is arranged in the limiting groove.

[0017] In some embodiments, the transfer unit is also provided with a rejection mechanism, which includes a pushing cylinder and a diverter slide. The pushing cylinder is arranged on the side of the conveyor belt and is distributed vertically with the conveyor belt. The diverter slide is arranged on the side of the conveyor belt and is distributed corresponding to the pushing cylinder.

[0018] In some embodiments, a displacement baffle is further provided on the conveyor belt, and the displacement baffle includes a displacement sensor and a spring baffle. The spring baffle is provided above the conveyor belt, and the displacement sensor is provided on the spring baffle.

[0019] In some embodiments, both the first negative mold plate and the second negative mold plate are provided with a material return mechanism.

[0020] A powder component molding method, comprising:

[0021] The first step is loading. Class A material is loaded into the first die sleeve. The auxiliary cylinder moves the down pressure head pad to move the first outer down pressure head, thereby adjusting the shape of Class A material. The powder loading height is determined by adjusting the position of the first inner down pressure head.

[0022] The second step is pre-pressing. The first upper pressure head enters the first die sleeve and pressurizes the Class A material. The first outer lower pressure head floats downward, and the first die sleeve and the first core rod float downward until the required height of the green sheet step is reached. Then the first upper pressure head, the first die sleeve and the first core rod move downward synchronously to complete the pre-pressing.

[0023] The third step is demoulding. The first core rod plate moves downward, driving the first mold sleeve and the first core rod to move downward. The first outer downward pressure head pushes the preform out of the first mold sleeve, and the product is pushed to the rectifier slideway through the material return mechanism.

[0024] The fourth step is transfer. The preform slides onto the conveyor belt through the rectifier slide by gravity. During the falling process, it turns 180 degrees based on the characteristics of the workpiece itself. The unturned preform is removed by the removal mechanism. The spacing between each preform is controlled by the displacement baffle, and then it is grabbed by the manipulator into the second mold sleeve cavity.

[0025] The fifth step is composite pressing. The second die set moves upward, and the type B material is loaded into the second die set through the external loading system. Then the second upper pressing head moves downward, and the second female die plate moves downward synchronously. At the same time, the second core rod shakes up and down for many times, and the second lower pressing head remains stationary to complete the pressing.

[0026] The sixth step is demoulding. The second female mold plate moves downward, the second core rod moves downward, and the second pressing head pushes the product out of the second mold sleeve.

[0027] The beneficial effects of the present invention are:

[0028] According to the powder assembly composite pressing system and molding method of the present invention, the composite pressing of Class A material and Class B material is achieved by pressing the preform of Class A material in the first pressing molding unit, and then moving the preform to the second pressing molding unit through the transfer unit and performing composite pressing together with Class B material. The two pressing units can perform pressing at the same time, which improves production efficiency, does not require multiple production lines, and reduces production costs. Products with different shapes can be pressed by replacing the first mold sleeve and moving the first external lower pressure head, and the versatility is strong. The transfer unit is provided with a rejection mechanism and a displacement baffle to effectively reject unqualified products and improve the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the layout of the powder component composite pressing system according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a first pressing unit according to an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a transfer unit according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of a second pressing unit according to an embodiment of the present invention;

[0033] Figure 5 Schematic diagram of a quick-change sleeve according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings.

[0035] The powder component composite pressing system of the embodiment of the present invention includes: a first pressing and molding unit 100 , a transfer unit 200 , and a second pressing and molding unit 300 .

[0036] Specifically, Figure 2As shown, the first pressing unit 100 includes a first hydraulic press, a first die frame, a first mold and a rectifying slideway 140. The first die frame includes a first upper die plate 111, a first female die plate 112, a first female die plate guide column 113, a lower ram pad 114, a first fixed lower ram plate 115, and a first core plate 116. The first upper die plate 111, the first female die plate 112, the lower ram pad 114, the first fixed lower ram plate 115, and the first core plate 116 are sequentially spaced from top to bottom. The first female die plate guide column 113 passes through the lower ram pad 114 and the first fixed lower ram plate 115, and its top end is fixedly connected to the first female die plate 112, and its bottom end is fixedly connected to the first core plate 116. The first mold includes a first upper ram 121, a first die sleeve 122, a quick-change sliding sleeve 4, a first outer lower ram 123, a first inner lower ram 124, and a first core plate 125. The first upper pressing head 121 is fixedly connected to the first upper mold plate 111. Figure 5 As shown, the quick-change sliding sleeve 4 includes an inner sleeve 41, an outer sleeve 42, and a limiting ball 43. The inner sleeve 41 is sleeved in the outer sleeve 42, and the first die sleeve 122 is sleeved in the inner sleeve 41. The outer wall of the first die sleeve is provided with a limiting groove, and the limiting ball 43 is arranged in the limiting groove. The outer sleeve 42 is arranged on the upper end of the first female die plate. The bottom end of the first core rod 125 is arranged on the first core rod plate 116, and its top end passes through the first female die plate 112, the lower pressure head pad 114, the first fixed lower pressure head plate 115 and the first die sleeve 122 and is flush with the top end of the first female die plate. The first upper pressure head is provided with a matching hole of a size corresponding to the first core rod 125. The first inner ram 124 is sleeved on the first core rod 125, and its bottom end is connected to the first fixed ram plate 115 through the ram washer, and its top end passes through the ram pad 114 and the first female mold plate 112 and extends into the first mold sleeve 122. The first outer ram 123 is sleeved outside the first inner ram 124, and its bottom end is stopped with the ram pad 114, and its top end passes through the first female mold plate 112 and extends into the first mold sleeve 122. The first hydraulic press has a main cylinder and an auxiliary cylinder 8. The upper cylinder of the main cylinder can control the first upper mold plate 111 to move up and down, thereby controlling the first upper ram 121 to move up and down, and the lower cylinder of the main cylinder controls the first core rod plate 116 to move up and down. The auxiliary cylinder 8 is arranged between the ram pad 114 and the first fixed ram plate 115, and can drive the ram pad 114 to move up and down, thereby controlling the first outer ram 123 to move up and down. The first fixed lower pressure head plate 115 is fixedly connected to the first hydraulic press. The first die sleeve 122 can be quickly replaced by the quick-change sliding sleeve 4, and workpieces of different shapes can be pressed by moving the first outer lower pressure head 123 and replacing different first die sleeves 122. The rectifying slideway 140 is fixedly connected to the side of the first female die plate 112 and arranged obliquely for transferring the pressed workpiece. The first female die plate 112 is also provided with a material return mechanism for transferring the workpiece.

[0037] like Figure 1 , Figure 3 As shown, the transfer unit 200 includes a conveyor belt 201 and a manipulator 202. One end of the conveyor belt is located below the rectifying slideway 140. The conveyor belt 201 is provided with a rejection mechanism, which includes a push cylinder 5 and a diverter slide 6. The push cylinder 5 is provided on one side of the conveyor belt 201 and is vertically distributed with the conveyor belt 201. The diverter slide 6 is provided on the other side of the conveyor belt 201 and is distributed corresponding to the push cylinder 5. The conveyor belt 201 is also provided with a displacement baffle 7. The displacement baffle includes a spring baffle and a displacement sensor. The displacement sensor is provided on the spring baffle. The spring baffle is provided on the conveyor belt 201 and can move relative to the conveyor belt 201. The manipulator 202 is provided beside the conveyor belt 201 and can move in space to transfer the workpieces on the conveyor belt 201.

[0038] like Figure 4 As shown, the second pressing unit 300 includes a second hydraulic press, a second die frame and a second mold, and the second die frame includes a second upper die plate 311, a second female die plate 312, a second female die plate guide column 313, a second fixed lower die plate 314, a second core plate 315, and a lower die plate 316. The second upper die plate 311, the second female die plate 312, the second fixed lower die plate 314, and the second core plate 315 are sequentially spaced from top to bottom on the second hydraulic press, and the second female die plate guide column 313 passes through the second fixed lower die plate 314, and its bottom end is fixedly connected to the second core plate 315, and its top end is fixedly connected to the second female die plate 312. The second mold includes a second upper die 321, a second die sleeve 322, a quick-change sliding sleeve 4, a second lower die 323, and a second core rod 324. The second upper die 321 is fixedly connected to the second upper die plate 311. The second die sleeve 322 is sleeved in the quick-change sleeve 4, and the quick-change sleeve 4 is arranged at the upper end of the second female die plate 312. The bottom end of the second core rod 324 is fixedly connected to the second core rod plate 315, and its top end passes through the second fixed lower ram plate 314, the second female die plate 312 and the second die sleeve 322 and is flush with the upper surface of the second female die plate 312. The second upper ram 321 is provided with a matching hole at the corresponding position of the second core rod 324. The second lower ram 323 is sleeved on the second core rod 324, and its bottom end is connected to the second fixed lower ram plate 314 through the lower ram washer, and its top end part extends into the second die sleeve 322. The second hydraulic press is provided with a main cylinder and a center cylinder 9, and the upper cylinder of the main cylinder is used to control the second upper die plate 311 to move up and down. The center cylinder 9 is arranged at the bottom of the second core rod plate 315, and the bottom of the center cylinder 9 is provided with a lower die plate 316. The lower cylinder of the main cylinder is used to control the lower die plate 10 to move up and down, and the center cylinder is used to drive the second core rod plate 315 to move up and down.

[0039] The molding method of the powder component composite pressing system of the embodiment of the present invention includes:

[0040] The first step is loading. The powder of Class A material is loaded into the first mold sleeve according to the constant volume method. The shape of the preform is determined by replacing different first mold sleeves 122 and moving the first outer down punch 123. The height of the first inner down punch 124 is changed by adjusting the down punch shim to determine the loading height.

[0041] The second step is pre-pressing. The first upper mold plate 111 is controlled by the main cylinder to move the first upper pressure head 121 downward. The first outer lower pressure head 123 floats downward under the pressure of pressing and the friction of powder on the mold wall. The first mold sleeve 122 and the first core rod 125 also float downward under the friction of powder, so that the main body is pressed first to achieve the effect of two-way pressing until the required height of the preform is reached. At this time, the first upper pressure head 121 moves downward synchronously with the first mold sleeve 122 and the first core rod 125, with a pressure of 12±0.5MPa, so that the preform is 3 mm higher than the finished product. The pressure is maintained for 6 seconds to press the main body into place.

[0042] The third step is demoulding. The main cylinder drives the first core plate 116 to move downward, and the lower pressure head pad 114 does not move. The preform is pushed out of the first mold sleeve 122 by the first outer lower pressure head 123. And it is transported to the rectifying slideway 140 through the material return mechanism.

[0043] The fourth step is transfer. The preform slides down the rectifying slideway 140 to the conveyor belt 201. During the falling process, the qualified preform will flip 180 degrees due to its own characteristics. The preform that fails to flip is pushed out of the conveyor belt by the push cylinder 5 of the rejection mechanism and moved out of the production line through the diversion slide 6. The spacing between the preforms on the conveyor belt 201 is adjusted by the displacement baffle 7. When the preform moves to the specified position through the conveyor belt 201, the manipulator 202 transfers the workpiece to the second pressing unit 300.

[0044] The fifth step is composite pressing. The preform is placed in the second die sleeve 322 by the manipulator 202, and then the lower die plate 316 moves upward, driving the second die sleeve 322 to move upward. The powder of the Class B material is loaded into the second die sleeve 322 by the external feeding system. The shape of the Class B material pressed product is determined by the preform and the second die sleeve 322. After the filling is completed, the second upper pressing head 321 moves downward, and the second female die plate 312 moves downward synchronously. The friction force of the inner wall of the second die sleeve 322 increases the distribution of the outer side of the material. At the same time, the second core rod 324 shakes up and down 6 times to improve the uniform distribution of the material. The second lower pressing head 323 remains stationary, and the main cylinder pressure is 13.5±0.5MPa. The pressure is maintained for 5s to press the main body of the workpiece into place.

[0045] The sixth step is demoulding. The lower mold plate 316 moves downward to drive the second female mold plate 312 to move downward. The second core rod plate 315 moves downward to drive the second core rod 324 to move downward. Since the second lower pressure head 323 does not move, the second lower pressure head 323 pushes the workpiece out of the second mold sleeve 322 to complete demoulding, thereby realizing the composite pressing of the oblique cone annular Class A material and the annular Class B material.

[0046] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0047] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0048] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A powder component composite pressing system, characterized in that: include: A first pressing and forming unit, wherein the first pressing and forming unit is used to pre-press the Class A material, and the rectifying slide is used to transfer the preformed product after pressing; A transfer unit, the transfer unit comprising a conveyor belt and a manipulator, the conveyor belt being used for screening and transferring the preforms; A second pressing and molding unit, wherein the second pressing and molding unit is used for composite pressing of the preform of the type A material and the type B material; The first pressing unit comprises a first hydraulic press, a first die frame, a first mold and a rectifying slideway, the first die frame comprises a first upper die plate, a first female die plate, a first female die plate guide column, a lower pressure head pad, a first fixed lower pressure head plate, and a first core plate, the first upper die plate, the first female die plate, the lower pressure head pad, the first fixed lower pressure head plate, and the first core plate are sequentially spaced from top to bottom and are all connected to the first hydraulic press, the two ends of the first female die plate guide column are respectively connected to the first female die plate and the first core plate, the first mold comprises a first upper pressure head, a first die sleeve, a quick A changeable sliding sleeve, a first outer lower pressure head, a first inner lower pressure head, and a first core rod, wherein the first upper pressure head is fixedly connected to the lower end surface of the first upper mold plate, the first mold sleeve and the quick-change sliding sleeve are detachably connected to the first female mold plate, the first outer lower pressure head is arranged on the lower pressure head pad, the first inner lower pressure head is arranged on the first fixed lower pressure head plate, the first core rod is arranged on the first core rod plate, the first hydraulic press is provided with a first main cylinder and an auxiliary cylinder, the auxiliary cylinder is used to control the movement of the first outer lower pressure head and the first inner lower pressure head, and one end of the rectifier slideway is connected to the first female mold plate and is arranged obliquely; The second pressing unit includes a second hydraulic press, a second die frame and a second mold, the second die frame includes a second upper mold plate, a second female mold plate, a second female mold plate guide column, a second fixed lower press head plate, a second core rod plate, and a lower mold plate, the second upper mold plate, the second female mold plate, the second fixed lower press head plate, the second core rod plate and the lower mold plate are spaced from top to bottom and are all fixedly connected to the second hydraulic press, the two ends of the second female mold plate guide column are respectively connected to the second female mold plate and the second core rod plate, the second mold includes a second upper press head, a second mold sleeve, a quick-change sliding sleeve, a second lower press head and a second core rod, the second upper press head is arranged on the second upper mold plate, the second mold sleeve and the quick-change sliding sleeve are detachably connected to the second female mold plate, the second lower press head is arranged on the second fixed lower press head plate, and the second core rod is arranged on the second core rod plate.

2. The powder component composite pressing system according to claim 1, characterized in that: The first main cylinder is used to control the first upper mold plate and the first core rod plate, and the auxiliary cylinder is used to control the lower pressure head pad, thereby controlling the movement of the first outer lower pressure head and the first inner lower pressure head.

3. The powder component composite pressing system according to claim 1, characterized in that: The second hydraulic press comprises a second main cylinder and a center cylinder, wherein the second main cylinder is used to control the second upper mold plate and the lower mold plate, and the center cylinder is used to control the second core rod plate.

4. The powder component composite pressing system according to claim 1, characterized in that: The quick-change sliding sleeve includes an inner sleeve, an outer sleeve, and a limiting ball. The inner sleeve is arranged in the outer sleeve. The outer diameter of the first mold sleeve or the second mold sleeve matches the inner sleeve. A limiting groove is provided on the outer side of the first mold sleeve or the second mold sleeve, and the limiting ball is arranged in the limiting groove.

5. The powder component composite pressing system according to claim 4, characterized in that: The transfer unit is also provided with a rejection mechanism, which includes a pushing cylinder and a diverter slide. The pushing cylinder is arranged on the side of the conveyor belt and is distributed vertically with the conveyor belt. The diverter slide is arranged on the side of the conveyor belt and is distributed corresponding to the pushing cylinder.

6. The powder component composite pressing system according to claim 5, characterized in that: The conveyor belt is also provided with a displacement baffle, which includes a displacement sensor and a spring baffle. The spring baffle is arranged above the conveyor belt, and the displacement sensor is arranged on the spring baffle.

7. The powder component composite pressing system according to claim 6, characterized in that: The first female mold plate and the second female mold plate are both provided with a material return mechanism.

8. The molding method of the powder component composite pressing system according to claim 7, characterized in that: include: The first step is loading. Class A material is loaded into the first die sleeve. The auxiliary cylinder moves the down pressure head pad to move the first outer down pressure head, thereby adjusting the shape of Class A material. The powder loading height is determined by adjusting the position of the first inner down pressure head. The second step is pre-pressing. The first upper pressure head enters the first die sleeve and pressurizes the Class A material. The first outer lower pressure head floats downward, and the first die sleeve and the first core rod float downward until the required height of the green sheet step is reached. Then the first upper pressure head, the first die sleeve and the first core rod move downward synchronously to complete the pre-pressing. The third step is demoulding. The first core rod plate moves downward, driving the first mold sleeve and the first core rod to move downward. The first outer downward pressure head pushes the preform out of the first mold sleeve, and the product is pushed to the rectifier slideway through the material return mechanism. The fourth step is transfer. The preform slides onto the conveyor belt through the rectifier slideway by gravity. During the falling process, it turns 180 degrees based on its own characteristics. The preform that has not been turned over is rejected by the rejection mechanism. The spacing between each preform is controlled by the displacement baffle, and then it is grabbed by the manipulator and put into the second mold sleeve cavity. The fifth step is composite pressing. The second die set moves upward, and the type B material is loaded into the second die set through the external loading system. Then the second upper pressing head moves downward, and the second female die plate moves downward synchronously. At the same time, the second core rod shakes up and down for many times, and the second lower pressing head remains stationary to complete the pressing. Step 6: demoulding, the second female mold plate moves downward, the second core rod moves downward, and the second pressing head pushes the product out of the second mold sleeve; Repeat the first to sixth steps to continuously carry out composite pressing of powder materials.

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