Automatic demolding mold for plastic cover

Abstract

The invention relates to the technical field of plastic part injection molding, in particular to an automatic plastic cover demolding mold which comprises a first fixing body, a centrifugal rotating mechanism is arranged in the first fixing body and comprises a main body cylinder rotationally arranged at the upper end of the first fixing body, and a first limiting groove is formed in the upper end of the main body cylinder; mounting grooves are formed in the main body cylinder and the lower end of the first fixing body, a second fixing body is rotationally arranged in each mounting groove, a polishing detection mechanism for polishing an inner hole of the spherical gasket and detecting bubbles is arranged at the upper end of each second fixing body, and a feeding plastic mechanism for sealed forming is arranged at the upper end of the main body cylinder; plastic in a hot melting state flows out at a constant speed through the discharging pipe on the inner side of the mounting ring, bubbles in the hot melting plastic material overflow towards the inner side under the action of centrifugal force, the content of the bubbles in the plastic cover is reduced, the supporting strength of the plastic cover is improved, and meanwhile the quality of sound transmitted after the plastic cover and the sound mechanism are mounted is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic part injection molding, in particular to an automatic demoulding mold for a plastic cover. Background Art

[0002] For some electronic circuit devices, such as computer hosts and audio equipment, the plastic protective cover of the computer power supply is provided with through holes, which can allow the heat generated by the power supply to be dissipated in time when the power supply is working, ensuring that the power supply operates at an appropriate temperature. The speaker grille of the audio is usually designed with a plastic cover with through holes. Therefore, the computer host and audio equipment need to use a plastic cover structure with a through hole in the middle to ensure the heat dissipation function and sound amplification effect of the overall structure.

[0003] During production, existing hollow plastic covers generally inject hot-melt plastic into a mold. After the mold cools down and becomes plastic, the plastic cover is ejected through a top body, and finally a hole is drilled in the middle of the plastic cover according to the size of the predetermined center hole. The plastic cover produced by this method requires cutting, which wastes a portion of the plastic, and the side of the center hole after cutting cannot be guaranteed to be flat, resulting in disordered sound propagation and reduced sound quality. Existing plastic covers are prone to bubbles during injection molding. The bubbles in the plastic cover will reduce the strength of the plastic cover, and the bubbles in the plastic cover may resonate with the propagated sound, reducing the quality of sound propagation after installation. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose an automatic demoulding mold for plastic covers.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a plastic cover automatic demolding mold, comprising a first fixed body, a centrifugal rotating mechanism is arranged in the first fixed body, the centrifugal rotating mechanism includes a main body cylinder rotatably arranged with the upper end of the first fixed body, the upper end of the main body cylinder is provided with a first limiting groove, the main body cylinder and the lower end of the first fixed body are provided with an installation groove, a second fixed body is rotatably arranged in the installation groove, the upper end of the second fixed body is provided with a grinding and detection mechanism for grinding and bubble detection on the inner hole of the spherical gasket, the upper end of the main body cylinder is provided with a sealing and molding feeding plastic mechanism, and the feeding plastic mechanism includes an upper cover plate.

[0006] Preferably, a placement groove is provided at the upper end of the main body tube, and a plurality of circumferentially arranged first electric telescopic rods are fixedly connected in the placement groove, and the telescopic ends of the plurality of first electric telescopic rods are respectively fixedly connected with a limiting ring that slides with the placement groove, and the upper end of the limiting ring is fixedly connected to the lower end of the upper cover plate, and a second limiting groove that rotates with the second fixing body is provided at the lower end of the first fixing body and in the main body tube.

[0007] Preferably, a third limiting groove is provided at the lower end of the upper cover plate, a rotation hole is provided at the upper end of the upper cover plate, and a fixing ring is rotatably provided in the rotation hole.

[0008] Preferably, the upper end of the fixing ring is fixedly connected to two symmetrically arranged third electric telescopic rods, the telescopic ends of the two third electric telescopic rods pass through the fixing ring, the telescopic ends of the two fixing rings are fixedly connected to a mounting ring, and the inner side of the mounting ring is connected to the discharge pipe of the hot-melt plastic.

[0009] Preferably, a fourth limiting groove communicating with the rotation hole is provided inside the upper cover plate, and a guide ring rotatably matched with the fourth limiting groove is fixedly connected to the side surface of the fixing ring.

[0010] Preferably, the grinding detection mechanism includes a cavity opened inside the first fixed body, a first motor is fixedly connected to the cavity, a transmission shaft end of the first motor is fixedly connected to a transmission rod, the end of the transmission rod is fixedly connected to a gear, and the side of the main body tube is fixedly connected to a gear ring arranged to mesh with the gear.

[0011] Preferably, an empty slot is provided at the upper end of the second fixed body, a third electric telescopic rod is fixedly connected to the empty slot, the telescopic end of the third electric telescopic rod is fixedly connected to a biaxial electric telescopic rod, a second guide groove is provided at the beginning of one telescopic end of the biaxial electric telescopic rod, a second spring is fixedly connected to the second guide slot, and the end of the second spring is fixedly connected to an acoustic wave detector.

[0012] Preferably, the other telescopic end of the dual-axis electric telescopic rod is fixedly connected to a pressure sensor, the end of the pressure sensor is fixedly connected to a second motor, the transmission shaft end of the second motor is fixedly connected to a grinding block, the end of the grinding block is provided with a first guide groove, a first spring is fixedly connected in the first guide groove, and the end of the first spring is fixedly connected to a top block that slides with the first guide groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Start the first motor, which drives the transmission rod to rotate. The transmission rod drives the gear ring to rotate through gear meshing, thereby driving the main tube and the upper cover to rotate. At this time, the two second electric telescopic rods are slowly extended, and the hot-melt plastic flows out at a uniform speed through the discharge pipe on the inner side of the mounting ring. Then, it is evenly smeared on the sides of the upper cover and the main tube under the left and right sides of the centrifugal force. At the same time, under the action of centrifugal force, the bubbles in the hot-melt plastic material overflow inward, reducing the bubble content in the plastic cover, increasing the supporting strength of the plastic cover, and improving the sound quality after the plastic cover and the sound mechanism are installed;

[0015] 2. Since the elongation at both ends of the dual-axis electric telescopic rod is the same, when the pressure sensor on the end face of the grinding block detects that the top block is in contact with the inner side of the plastic cover, the acoustic wave detector at the other end of the dual-axis electric telescopic rod is in contact with the inner side of the plastic cover. Afterwards, since the lower end of the second fixed body is fixedly connected to the first fixed body, the acoustic wave detector can detect any position on the inner side of the plastic cover and detect the plastic cover with too many bubbles. At the same time, the second motor is started, and the second motor drives the grinding block to rotate. The grinding block can grind the inside of the plastic cover, reducing the waste rate of plastic and ensuring the smoothness of the inner hole of the plastic cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 The present invention is a sectional view of the whole Figure 1 ;

[0018] Figure 3 The present invention is a sectional view of the whole Figure 2 ;

[0019] Figure 4 It is a partial structural diagram of the present invention;

[0020] Figure 5 For the present invention Figure 2 A magnified view of point A;

[0021] Figure 6 For the present invention Figure 3 Enlarged view of point B;

[0022] Figure 7 For the present invention Figure 3 Enlarged view of point C.

[0023] 1. First fixed body; 2. Centrifugal rotation mechanism; 3. Grinding and detection mechanism; 4. Material feeding plastic mechanism; 21. Main body; 22. Placement slot; 23. First electric telescopic rod; 24. First limiting slot; 25. Second limiting slot; 26. Mounting slot; 27. Second fixed body; 31. Empty slot; 32. Second electric telescopic rod; 33. Cavity; 34. Gear ring; 35. Gear; 36. Transmission rod; 37. First motor; 38. Dual-axis electric telescopic Rod; 39, second motor; 310, grinding block; 311, first guide groove; 312, top block; 313, first spring; 314, second guide groove; 315, second spring; 316, acoustic wave detector; 317, pressure sensor; 41, upper cover; 42, limiting ring; 43, third limiting groove; 44, third electric telescopic rod; 45, rotating hole; 46, fixing ring; 47, mounting ring; 48, fourth limiting groove; 49, guide ring. DETAILED DESCRIPTION

[0024] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0025] See also Figure 1-Figure 7 A plastic cover automatic demoulding mold includes a first fixed body 1, in which a centrifugal rotating mechanism 2 is provided.

[0026] In this embodiment, the centrifugal rotating mechanism 2 includes a main body tube 21 rotatably arranged with the upper end of the first fixed body 1, and a first limiting groove 24 is provided at the upper end of the main body tube 21. An installation groove 26 is provided in the main body tube 21 and at the lower end of the first fixed body 1, and a second fixed body 27 is rotatably arranged in the installation groove 26.

[0027] A placement groove 22 is provided at the upper end of the main body tube 21, and a plurality of circumferentially arranged first electric telescopic rods 23 are fixedly connected to the placement groove 22. The telescopic ends of the plurality of first electric telescopic rods 23 are respectively fixedly connected to a limiting ring 42 that slides with the placement groove 22. The upper end of the limiting ring 42 is fixedly connected to the lower end of the upper cover plate 41. A second limiting groove 25 that rotates with the second fixing body 27 is provided at the lower end of the first fixing body 1 and in the main body tube 21.

[0028] Specifically, several first electric telescopic rods 23 are retracted, and several first electric telescopic rods 23 drive the limit ring 42 to move into the placement groove 22, so that the main tube 21 and the upper cover plate 41 are sealed, and then the end of the hot melt plastic discharge pipe is fixedly connected to the side of the mounting ring 47 by bolts.

[0029] In this embodiment, a grinding and detecting mechanism 3 for grinding and detecting bubbles on the inner hole of the spherical gasket is provided at the upper end of the second fixing body 27 .

[0030] The grinding detection mechanism 3 includes a cavity 33 opened inside the first fixed body 1, and a first motor 37 is fixedly connected to the cavity 33. The transmission shaft end of the first motor 37 is fixedly connected to a transmission rod 36, and the end of the transmission rod 36 is fixedly connected to a gear 35. The side of the main tube 21 is fixedly connected to a gear ring 34 that is meshed with the gear 35.

[0031] A slot 31 is provided at the upper end of the second fixed body 27, in which a second electric telescopic rod 32 is fixedly connected, a telescopic end of the second electric telescopic rod 32 is fixedly connected to a biaxial electric telescopic rod 38, a second guide groove 314 is provided at the beginning of one telescopic end of the biaxial electric telescopic rod 38, a second spring 315 is fixedly connected in the second guide groove 314, and an acoustic wave detector 316 is fixedly connected to the end of the second spring 315.

[0032] The other telescopic end of the dual-axis electric telescopic rod 38 is fixedly connected to a pressure sensor 317, the end of the pressure sensor 317 is fixedly connected to a second motor 39, the transmission shaft end of the second motor 39 is fixedly connected to a grinding block 310, and the end of the grinding block 310 is provided with a first guide groove 311, and a first spring 313 is fixedly connected in the first guide groove 311, and the end of the first spring 313 is fixedly connected to a top block 312 that slides with the first guide groove 311.

[0033] Specifically, since the lower end of the second fixed body 27 is fixedly connected to the first fixed body 1, the acoustic wave detector 316 can detect any position inside the spherical gasket and detect the plastic cover with too many bubbles. At the same time, the second motor 39 is started, and the second motor 39 drives the grinding block 310 to rotate, and the grinding block 310 can grind the inside of the spherical gasket.

[0034] In this embodiment, a sealed and molded feeding plastic mechanism 4 is provided at the upper end of the main body tube 21 , and the feeding plastic mechanism 4 includes an upper cover plate 41 .

[0035] A third limiting groove 43 is defined at the lower end of the upper cover plate 41 , and a rotation hole 45 is defined at the upper end of the upper cover plate 41 . A fixing ring 46 is rotatably disposed in the rotation hole 45 .

[0036] The upper end of the fixing ring 46 is fixedly connected to two symmetrically arranged third electric telescopic rods 44, the telescopic ends of the two third electric telescopic rods 44 pass through the fixing ring 46, and the telescopic ends of the two fixing rings 46 are fixedly connected to a mounting ring 47, the inner side of the mounting ring 47 is connected to the discharge pipe of the hot melt plastic.

[0037] A fourth limiting groove 48 communicating with the rotation hole 45 is formed inside the upper cover plate 41 , and a guide ring 49 rotatably engaged with the fourth limiting groove 48 is fixedly connected to a side surface of the fixing ring 46 .

[0038] Specifically, the two third electric telescopic rods 44 are slowly extended, and the hot-melt plastic flows out at a uniform speed through the discharge pipe inside the mounting ring 47, and is then evenly smeared on the sides of the upper cover plate 41 and the main body tube 21 under the left and right sides of the centrifugal force. At the same time, under the action of the centrifugal force, the bubbles in the hot-melt plastic material overflow inward, reducing the bubble content in the plastic cover, increasing the supporting strength of the plastic cover, and improving the sound quality transmitted after the plastic cover and the sound mechanism are installed.

[0039] When in use, several first electric telescopic rods 23 are retracted, and several first electric telescopic rods 23 drive the limit ring 42 to move into the placement groove 22, so that the main tube 21 and the upper cover plate 41 are sealed. Then, the end of the discharge pipe of the hot-melt plastic is fixedly connected to the side of the mounting ring 47 by bolts, and the first motor 37 is started. The first motor 37 drives the transmission rod 36 to rotate, and the transmission rod 36 drives the gear ring 34 to rotate through the engagement of the gear 35, thereby driving the main tube 21 and the upper cover plate 41 to rotate. At this time, the two third electric telescopic rods 44 are slowly extended, and the hot-melt plastic flows out at a uniform speed through the discharge pipe on the inside of the mounting ring 47, and then is evenly smeared on the sides of the upper cover plate 41 and the main tube 21 under the left and right sides of the centrifugal force. At the same time, under the action of centrifugal force, the bubbles in the hot-melt plastic material overflow inward, reducing the bubble content in the plastic cover, improving the supporting strength of the plastic cover, and improving the sound quality transmitted after the plastic cover and the audio mechanism are installed.

[0040] During the cooling process of the hot-melt plastic material, the second electric telescopic rod 32 is extended, and the biaxial electric telescopic rod 38 is extended at the same time. Since the elongation of both ends of the biaxial electric telescopic rod 38 is the same, when the pressure sensor 317 on the end face of the grinding block 310 detects that the top block 312 is in contact with the inner side of the spherical gasket, the acoustic wave detector 316 at the other end of the biaxial electric telescopic rod 38 is just in contact with the inner side of the spherical gasket. Afterwards, since the lower end of the second fixed body 27 is fixedly connected to the first fixed body 1, the acoustic wave detector 316 can detect any position on the inner side of the plastic cover and detect the plastic cover with too many bubbles. At the same time, the second motor 39 is started, and the second motor 39 drives the grinding block 310 to rotate. The grinding block 310 can grind the inside of the plastic cover, reduce the waste rate of plastic, and ensure the smoothness of the inner hole of the plastic cover.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic cover automatic demoulding mold, comprising a first fixed body (1), characterized in that: A centrifugal rotating mechanism (2) is provided in the first fixed body (1), and the centrifugal rotating mechanism (2) includes a main body tube (21) rotatably provided with the upper end of the first fixed body (1), a first limiting groove (24) is provided at the upper end of the main body tube (21), a mounting groove (26) is provided in the main body tube (21) and at the lower end of the first fixed body (1), a second fixed body (27) is rotatably provided in the mounting groove (26), a grinding detection mechanism (3) for grinding and bubble detection on the inner hole of the spherical gasket is provided at the upper end of the second fixed body (27), and a sealing and molding feeding plastic mechanism (4) is provided at the upper end of the main body tube (21), and the feeding plastic mechanism (4) includes an upper cover plate (41).

2. The automatic demoulding mold for plastic cover according to claim 1, characterized in that: A placement groove (22) is provided at the upper end of the main body tube (21), and a plurality of circumferentially arranged first electric telescopic rods (23) are fixedly connected in the placement groove (22). The telescopic ends of the plurality of first electric telescopic rods (23) are respectively fixedly connected to a limiting ring (42) that is slidably engaged with the placement groove (22). The upper end of the limiting ring (42) is fixedly connected to the lower end of the upper cover plate (41). A second limiting groove (25) that is rotatably engaged with the second fixing body (27) is provided at the lower end of the first fixing body (1) and in the main body tube (21).

3. The automatic demoulding mold for plastic cover according to claim 1, characterized in that: A third limiting groove (43) is provided at the lower end of the upper cover plate (41), and a rotation hole (45) is provided at the upper end of the upper cover plate (41). A fixing ring (46) is rotatably arranged in the rotation hole (45).

4. The automatic demoulding mold for plastic cover according to claim 3, characterized in that: The upper end of the fixing ring (46) is fixedly connected to two symmetrically arranged third electric telescopic rods (44), the telescopic ends of the two third electric telescopic rods (44) pass through the fixing ring (46), and the telescopic ends of the two fixing rings (46) are fixedly connected to a mounting ring (47), and the inner side of the mounting ring (47) is connected to a discharge pipe of the hot melt plastic.

5. The automatic demoulding mold for plastic cover according to claim 4, characterized in that: A fourth limiting groove (48) communicating with the rotation hole (45) is provided inside the upper cover plate (41), and a guide ring (49) rotatably matched with the fourth limiting groove (48) is fixedly connected to the side surface of the fixing ring (46).

6. The automatic demoulding mold for plastic caps according to claim 1, characterized in that: The grinding detection mechanism (3) comprises a cavity (33) provided inside a first fixed body (1), a first motor (37) being fixedly connected to the cavity (33), a transmission shaft end of the first motor (37) being fixedly connected to a transmission rod (36), an end of the transmission rod (36) being fixedly connected to a gear (35), and a side surface of the main body tube (21) being fixedly connected to a gear ring (34) meshing with the gear (35).

7. The automatic demoulding mold for plastic cover according to claim 6, characterized in that: A slot (31) is provided at the upper end of the second fixed body (27), a second electric telescopic rod (32) is fixedly connected in the slot (31), a telescopic end portion of the second electric telescopic rod (32) is fixedly connected to a biaxial electric telescopic rod (38), a second guide slot (314) is provided at the beginning of one telescopic end portion of the biaxial electric telescopic rod (38), a second spring (315) is fixedly connected in the second guide slot (314), and an end portion of the second spring (315) is fixedly connected to an acoustic wave detector (316).

8. The automatic demoulding mold for plastic caps according to claim 7, characterized in that: The other telescopic end of the dual-axis electric telescopic rod (38) is fixedly connected to a pressure sensor (317), the end of the pressure sensor (317) is fixedly connected to a second motor (39), the transmission shaft end of the second motor (39) is fixedly connected to a grinding block (310), the end of the grinding block (310) is provided with a first guide groove (311), the first guide groove (311) is fixedly connected to a first spring (313), and the end of the first spring (313) is fixedly connected to a top block (312) that slidably cooperates with the first guide groove (311).

Images