A rotary variable differential transformer integrated forming structure, an injection mold and a forming process

Abstract

The application discloses a rotary variable integrated forming structure, which comprises a power base, a die base fixedly arranged above the power base, a sealing base arranged on the die base and an ejection push rod arranged below the power base, a rotary frame cylinder is rotationally arranged above the power base, a rotary base is arranged above the rotary frame cylinder, a plurality of arc limiters are arranged in an annular array on the rotary base, a positioning disc is arranged on the inner side of the die base and above the rotary base, a plurality of straight limiters are arranged in an annular array on the positioning disc, tooth blocks are slidably arranged in the straight limiters, mold teeth are arranged on the tooth blocks, the bottom of the tooth blocks is slidably arranged in the arc limiters, an upper mold disc is arranged below the sealing base, a lower mold disc is arranged at the end of the ejection push rod and a plurality of fixing blocks are arranged above the lower mold disc, after injection molding is completed, the upper mold disc is first separated, then the lower mold disc is rotated and moved upwards, and the injection molded part can be separated from the mold teeth, so that the problem that the injection molded part is not easy to separate during the integrated forming in the injection molding process is solved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a rotational integral molding structure, injection mold, and molding process. Background Technology

[0002] In the injection molding process of complex injection molded parts, the mold preparation process before injection molding and the demolding process after injection molding have a significant impact on the yield rate of the finished product. The sliding mechanism in the injection mold refers to the mechanism that enables lateral core pulling or lateral parting to facilitate product removal. Existing injection mold sliding mechanisms can only demold in a straight line in a single direction. When dealing with more complex injection molded parts such as impellers, where the contour surface and undercuts of the injection molded product need to be removed through non-linear means, the traditional method of removal can easily lead to the injection molded product not being able to be molded in one go within the same mold. In this case, it is necessary to ensure the stability of the injection molded part during the demolding process. At the same time, the stability and flexibility of the internal molding structure must be ensured during both injection molding and demolding processes. Summary of the Invention

[0003] The purpose of this invention is to provide a rotational integral molding structure, injection mold and molding process to solve the technical problems mentioned above.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A rotary converter integrated molding structure includes a power base, a mold base fixedly disposed above the power base, a sealing seat located on the mold base, and a demolding push rod disposed below the power base. A rotating frame is rotatably disposed above the power base, and a rotating seat is disposed above the rotating frame. Several arc-shaped limiters are arranged in a circular array on the rotating seat. A positioning plate is disposed on the inner side of the mold base and located above the rotating seat. Several linear limiters are arranged in a circular array on the positioning plate, and tooth blocks are slidably disposed within the linear limiters. Mold teeth are disposed on the tooth blocks, and the bottom of the tooth blocks is slidably disposed within the arc-shaped limiters. An upper mold plate is disposed below the sealing seat. The demolding push rod passes through the rotating frame and the rotating seat and has a lower mold plate at its end. Several fixing blocks are arranged in a circular array on the lower mold plate.

[0006] As a further embodiment of the present invention: a drive gear is fixedly installed below the rotating frame and outside the ejector rod, a power motor is installed on one side of the power seat, and a transmission gear is installed on the output end of the power motor and meshes with the drive gear.

[0007] As a further embodiment of the present invention: a fixed cylinder is provided below the power seat, a fixed plate is provided inside the fixed cylinder, an outer limiting cylinder is provided above the fixed plate and a mold release limit is provided on one side, the mold release push rod is provided inside the outer limiting cylinder and a limiting slider is provided on the outside and is slidably provided within the mold release limit.

[0008] As a further embodiment of the present invention: a demolding cylinder is provided below the fixed plate and its extended end is rotatably connected to the demolding push rod.

[0009] As a further aspect of the present invention: a plurality of external positioning posts are provided above the mold base, a positioning seat is provided on the outer side of the sealing seat, and a plurality of external positioning holes are provided below the positioning seat and are adapted to the external positioning posts.

[0010] As a further aspect of the present invention: an inner sliding groove is provided on the inner side of the positioning seat, and a plurality of inner positioning posts are provided inside the inner sliding groove. A plurality of positioning sliders are provided on the outer side of the sealing seat and are slidably connected to the inner positioning posts respectively. A return spring is provided outside the inner positioning posts and below the positioning sliders.

[0011] As a further aspect of the present invention: an upper mold plate is provided below the sealing seat and a mold position is opened below it.

[0012] As a further embodiment of the present invention: an injection mold, adopting the above-described rotational integral molding structure, further includes a top seat and a base, a plurality of pads are provided above the base, a support seat is provided above the plurality of pads, a power seat is fixedly provided on the support seat, and a fixed cylinder is provided in the middle of the support seat and the base.

[0013] The sealing seat is fixedly disposed below the top seat, and the top seat is provided with an injection port that passes through the top seat, the sealing seat and the upper mold plate.

[0014] As a further aspect of the present invention, a pressure connecting block is provided above the top seat.

[0015] As a further aspect of the present invention: a molding process, using the aforementioned injection mold, includes the following steps:

[0016] Step 1: The ejector cylinder remains in its initial position. The power motor drives the transmission gear to rotate, which in turn drives the drive gear and the upper rotating seat to rotate. The rotating seat rotates and limits the tooth block through the arc-shaped limit. The tooth block then moves inward along the straight limit under the action of the straight limit. Then the top seat moves downward, causing the sealing seat to move into the interior of the mold base, and at the same time, the upper mold plate and the mold tooth are engaged and connected.

[0017] Step 2: Inject through the injection port, then cool;

[0018] Step 3: The top seat moves upward to separate the upper mold plate from the injection part. Then, the ejector cylinder extends and pushes the ejector rod upward. Under the limiting action of the ejector limiter, the ejector rod first drives the lower mold plate and the upper injection part to rotate, and then pushes it upward. Finally, the power motor reverses and controls the mold teeth to separate from the injection part, so that the injection part can be taken out.

[0019] The beneficial effects of this invention are:

[0020] (1) In this invention, by rotating the rotating seat and cooperating with the positioning plate, the mold teeth can be controlled to move inward and cooperate with the fixed block on the lower mold plate. Then, by moving the sealing seat downward, the upper mold plate below cooperates with the mold teeth below. After injection molding is completed, the upper mold plate is separated first, and then the lower mold plate is rotated and moved upward, so that the injection molded part can be separated from the mold teeth. This effectively solves the problem that the injection molded part and the mold teeth cannot be separated after injection molding. For example, when injection molding impellers and similar fan blades, if the direct push method is used, the blades are very likely to bend or crack. By using the rotary upward push method, the injection molded part can be quickly removed, and its integrity and pass rate can be guaranteed.

[0021] (2) In this invention, a number of external positioning posts are provided above the mold base, and a positioning seat is provided on the outside of the sealing seat. A number of external positioning holes are opened below the positioning seat and are adapted to the external positioning posts. During the downward movement of the sealing seat, the positioning seat first contacts the mold base. By inserting the external positioning posts into the external positioning holes, the accuracy of the downward movement of the sealing seat can be guaranteed, and the sealing performance of the mold during the injection molding process can be guaranteed. At the same time, the sealing seat will be inside the mold base and cooperate with the mold base to seal, which more effectively guarantees the sealing effect of the entire mold.

[0022] (3) In this invention, the ejector cylinder remains in the initial position, the power motor drives the transmission gear to rotate, which in turn drives the drive gear and the upper rotating seat to rotate. The rotating seat rotates and limits the tooth block through the arc-shaped limit. The tooth block moves inward along the straight limit under the action of the straight limit. Then the top seat moves downward so that the sealing seat moves down into the interior of the mold base, and at the same time makes the upper mold plate fit and connect with the mold tooth. Injection is performed through the injection port and then cooled. The top seat moves upward to separate the upper mold plate from the injection part. Then the ejector cylinder extends and pushes the ejector push rod upward. Under the limiting action of the ejector limit, the ejector push rod first drives the lower mold plate and the upper injection part to rotate, and then pushes upward. Finally, the power motor reverses and controls the mold tooth to separate from the injection part, so that the injection part can be taken out. The whole injection molding process is simple, the injection effect is good, and it will not damage the injection part. It is convenient to take out the part after the injection is completed. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic cross-sectional view of the integrally molded spin converter structure in this invention;

[0025] Figure 2 This is a top view schematic diagram of the connection structure between the rotating seat and the rotating frame cylinder in this invention;

[0026] Figure 3 This is a schematic diagram of the top cross-sectional structure of the mold base in this invention;

[0027] Figure 4 This is a cross-sectional schematic diagram of the connection structure between the fixing block and the lower mold plate in this invention;

[0028] Figure 5 This is a schematic cross-sectional view of the injection mold in this invention;

[0029] Figure 6 yes Figure 5 Enlarged structural diagram of region A in the middle;

[0030] Figure 7 This is a schematic diagram of the overall structure of the injection mold in this invention.

[0031] In the diagram: 1. Base; 11. Fixed cylinder; 110. Demolding cylinder; 111. Fixed plate; 1110. Demolding limit; 112. Outer limit cylinder; 113. Demolding push rod; 1131. Limiting slider; 114. Lower mold plate; 115. Fixed block; 2. Pad block; 3. Support base; 4. Power base; 40. Power motor; 41. Transmission gear; 42. Drive gear; 43. Rotating frame; 44. Rotation 440. Arc-shaped limit; 5. Mold base; 51. Positioning plate; 510. Linear limit; 52. Mold tooth; 521. Tooth block; 53. External positioning post; 6. Positioning seat; 60. External positioning hole; 61. Inner slide; 62. Inner positioning post; 63. Return spring; 7. Top seat; 70. Injection port; 71. Sealing seat; 711. Positioning slider; 72. Upper mold plate; 73. Mold position; 74. Pressure connecting block. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 - Figure 7As shown, this invention is a rotary integral molding structure, including a power base 4, a mold base 5 fixedly disposed above the power base 4, a sealing seat 71 located on the mold base 5, and a demolding push rod 113 disposed below the power base 4. A rotating frame 43 is rotatably disposed above the power base 4, and a rotating seat 44 is disposed above the rotating frame 43. Several arc-shaped limiters 440 are arranged in a circular array on the rotating seat 44. A positioning disk 51 is disposed on the inner side of the mold base 5 and is located above the rotating seat 44. Several linear limiters 510 are arranged in a circular array on the positioning disk 51, and tooth blocks 521 are slidably disposed within the linear limiters 510. Mold teeth 52 are disposed on the tooth blocks 521, and the bottom of the tooth blocks 521 is slidably disposed within the arc-shaped limiters 440. The sealing seat 71 is not specified. Below part 1, an upper mold plate 72 is provided. The ejector rod 113 passes through the rotating frame 43 and the rotating seat 44 and has a lower mold plate 114 at its end. Several fixing blocks 115 are arranged in a ring array on the lower mold plate 114. By rotating the rotating seat 44 and cooperating with the positioning plate 51, the mold teeth 52 can be controlled to move inward and cooperate with the fixing blocks 115 on the lower mold plate 114. Then, the sealing seat 71 moves downward so that the lower upper mold plate 72 cooperates with the lower mold teeth 52. After injection molding is completed, the upper mold plate 72 is separated first, and then the lower mold plate 114 is rotated and moved upward to separate the injection molded part from the mold teeth 52, which solves the problem that the injection molded part is not easy to separate during the injection molding process.

[0034] Specifically, a drive gear 42 is fixedly installed below the rotating frame 43 and outside the ejector rod 113. A power motor 40 is installed on one side of the power seat 4. A transmission gear 41 is installed on the output end of the power motor 40 and meshes with the drive gear 42. The power motor 40 drives the transmission gear 41 to rotate, which in turn drives the drive gear 42 and the rotating seat 44 above to rotate.

[0035] Secondly, a fixed cylinder 11 is provided below the power seat 4. A fixed plate 111 is provided inside the fixed cylinder 11. An outer limiting cylinder 112 is provided above the fixed plate 111 and a mold release limit 1110 is provided on one side. The mold release push rod 113 is provided inside the outer limiting cylinder 112 and a limiting slider 1131 is provided on the outside and is slidably provided in the mold release limit 1110.

[0036] A demolding cylinder 110 is provided below the fixed plate 111, and its extended end is rotatably connected to the demolding push rod 113. The demolding cylinder 110 pushes the demolding push rod 113 forward. At the same time, under the limiting action of the demolding limiter 1110 on the limiting slider 1131, the demolding push rod 113 pushes the lower mold plate 114 upward in a rotating manner. This can quickly and effectively separate the injection molded part from the mold tooth 52, effectively solving the problem that the injection molded part and the mold tooth 52 cannot be separated after injection molding. For example, when injection molding impellers and similar fan blades, if a direct push method is used, the blades are prone to bending or cracking. The rotary upward push method ensures the rapid release of the injection molded part, as well as its integrity and pass rate.

[0037] Several external positioning pins 53 are provided on the upper part of the mold base 5, and a positioning seat 6 is provided on the outer side of the sealing seat 71. Several external positioning holes 60 are provided on the lower part of the positioning seat 6 and are adapted to the external positioning pins 53. During the downward movement of the sealing seat 71, the positioning seat 6 first contacts the mold base 5. By inserting the external positioning pins 53 into the external positioning holes 60, the accuracy of the downward movement of the sealing seat 71 can be ensured, and the sealing of the mold during the injection molding process can be guaranteed.

[0038] In addition, an inner groove 61 is provided on the inner side of the positioning seat 6, and a number of inner positioning pins 62 are provided inside the inner groove 61. A number of positioning sliders 711 are provided on the outer side of the sealing seat 71 and are slidably connected to the inner positioning pins 62 respectively. A return spring 63 is provided outside the inner positioning pins 62 and below the positioning sliders 711. When the positioning seat 6 is placed on the mold base 5, the sealing seat 71 moves downward, so that the upper mold plate 72 cooperates with the mold teeth 52 and the lower mold plate 114. At the same time, the sealing seat 71 will be inside the mold base 5 and cooperate with the mold base 5 to seal, which more effectively ensures the sealing effect of the entire mold.

[0039] The upper mold plate 72 is provided below the sealing seat 71 and the mold position 73 is provided below it. The mold position 73 and the mold teeth 52 are designed according to the shape of the injection molded part.

[0040] An injection mold, employing the aforementioned rotational integral molding structure, further includes a top seat 7 and a base 1. A plurality of pads 2 are disposed above the base 1, and a support seat 3 is disposed above the plurality of pads 2. A power seat 4 is fixedly disposed on the support seat 3, and a fixed cylinder 11 is disposed in the middle of the support seat 3 and the base 1.

[0041] The sealing seat 71 is fixedly installed below the top seat 7, and the top seat 7 is provided with an injection port 70 that passes through the top seat 7, the sealing seat 71 and the upper mold plate 72.

[0042] A pressure connection block 74 is provided above the top seat 7. When in use, the pressure connection block 74 is connected to the pressure source above, and then the injection molded part can be injection molded.

[0043] A molding process, using the aforementioned injection mold, includes the following steps:

[0044] Step 1: The ejector cylinder 110 remains in the initial position. The power motor 40 drives the transmission gear 41 to rotate, which in turn drives the drive gear 42 and the upper rotating seat 44 to rotate. The rotating seat 44 rotates and limits the tooth block 521 through the arc-shaped limit 440. The tooth block 521 then moves inward along the straight limit 510 under the action of the straight limit 510. Then the top seat 7 moves downward so that the sealing seat 71 moves down into the interior of the mold base 5, and at the same time, the upper mold plate 72 and the mold tooth 52 fit together and connect.

[0045] Step 2: Inject through injection port 70, then cool;

[0046] Step 3: The top seat 7 moves upward to separate the upper mold plate 72 from the injection part. Then, the ejector cylinder 110 extends and pushes the ejector push rod 113 upward. Under the limiting action of the ejector limit 1110, the ejector push rod 113 first drives the lower mold plate 114 and the injection part above to rotate, and then pushes it upward. Finally, the power motor 40 reverses and controls the mold teeth 52 to separate from the injection part, so that the injection part can be taken out.

[0047] The entire injection molding process is simple, the injection effect is good, it will not damage the injection molded parts, and it is convenient to remove the parts after the injection is completed.

[0048] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A rotary integral molding structure, comprising a power base (4), a mold base (5) fixedly disposed above the power base (4), a sealing seat (71) located on the mold base (5), and a demolding push rod (113) disposed below the power base (4), characterized in that, A rotating frame (43) is rotatably mounted above the power base (4), and a rotating seat (44) is mounted above the rotating frame (43). Several arc-shaped limiters (440) are arranged in a circular array on the rotating seat (44). A positioning disk (51) is located on the inner side of the mold base (5) and is positioned above the rotating seat (44). Several linear limiters (510) are arranged in a circular array on the positioning disk (51), and sliding positions are provided within the linear limiters (510). A toothed block (521) is provided, and a mold tooth (52) is provided on the toothed block (521). The bottom of the toothed block (521) is slidably provided in the arc-shaped limit (440). An upper mold plate (72) is provided below the sealing seat (71). The ejector push rod (113) passes through the rotating frame (43) and the rotating seat (44) and is provided with a lower mold plate (114) at its end. Several fixing blocks (115) are arranged in a ring array on the lower mold plate (114). A fixed cylinder (11) is provided below the power seat (4). A fixed plate (111) is provided inside the fixed cylinder (11). An outer limiting cylinder (112) is provided above the fixed plate (111) and a mold release limit (1110) is provided on one side. The mold release push rod (113) is provided inside the outer limiting cylinder (112) and a limiting slider (1131) is provided on the outside and is slidably provided in the mold release limit (1110). A demolding cylinder (110) is provided below the fixed plate (111), and its extended end is rotatably connected to the demolding push rod (113). The impeller is injection molded.

2. The integrally molded structure for rotation according to claim 1, characterized in that, A drive gear (42) is fixedly installed below the rotating frame (43) and outside the ejector rod (113). A power motor (40) is installed on one side of the power seat (4). A transmission gear (41) is installed on the output end of the power motor (40) and meshes with the drive gear (42).

3. The integrally molded structure for rotation according to claim 2, characterized in that, The mold base (5) is provided with several external positioning posts (53) above it, and the sealing seat (71) is provided with a positioning seat (6) on the outside. The positioning seat (6) is provided with several external positioning holes (60) below it and is adapted to the external positioning posts (53).

4. The integrally molded structure for rotation according to claim 3, characterized in that, The inner side of the positioning seat (6) is provided with an inner sliding groove (61), and a number of inner positioning posts (62) are provided inside the inner sliding groove (61). A number of positioning sliders (711) are provided on the outer side of the sealing seat (71) and are slidably connected to the inner positioning posts (62). A return spring (63) is provided outside the inner positioning posts (62) and below the positioning sliders (711).

5. The integrally molded structure for rotation according to claim 4, characterized in that, The sealing seat (71) is provided with an upper mold plate (72) below it and a mold position (73) is provided below it.

6. An injection mold, characterized in that, The rotary integral molding structure described in claim 5 further includes a top seat (7) and a base (1). A plurality of pads (2) are provided above the base (1), and a support seat (3) is provided above the plurality of pads (2). The power seat (4) is fixedly installed on the support seat (3), and the fixing cylinder (11) is installed in the middle of the support seat (3) and the base (1). The sealing seat (71) is fixedly disposed below the top seat (7), and the top seat (7) is provided with an injection port (70) that passes through the top seat (7), the sealing seat (71) and the upper mold plate (72).

7. An injection mold according to claim 6, characterized in that, A pressure connection block (74) is provided above the top seat (7).

8. A molding process, characterized in that, Using the injection mold as described in claim 7, the method includes the following steps: Step 1: The ejector cylinder (110) remains in the initial position. The power motor (40) drives the transmission gear (41) to rotate, which in turn drives the drive gear (42) and the upper rotating seat (44) to rotate. The rotating seat (44) rotates and limits the tooth block (521) through the arc-shaped limit (440). The tooth block (521) then moves inward along the straight limit (510) under the action of the straight limit (510). Then the top seat (7) moves downward so that the sealing seat (71) moves down into the mold base (5), and at the same time, the upper mold plate (72) and the mold tooth (52) fit together and connect. Step 2: Inject through the injection port (70), and then cool; Step 3: The top seat (7) moves upward to separate the upper mold plate (72) from the injection molded part. Then the ejector cylinder (110) extends and pushes the ejector push rod (113) upward. Under the limiting action of the ejector limit (1110), the ejector push rod (113) first drives the lower mold plate (114) and the upper injection molded part to rotate, and then pushes it upward. Finally, the power motor (40) reverses and controls the mold teeth (52) to separate from the injection molded part, so that the injection molded part can be taken out.

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