A two-color runner injection mold for automobile knobs

Abstract

The present invention belongs to the technical field of two-color injection molding, and is particularly a two-color runner injection mold for automobile knobs. In view of the problem in the prior art that the time-consuming and complicated centering correction is required after the rotating disk rotates during two-color injection molding, resulting in low injection molding efficiency, the following scheme is proposed, including an injection molding main frame, the upper surface of the injection molding main frame is near one end and is reserved with two vertical plates symmetrical to each other about the center line in the length direction, the same annular slot is fixed between the two vertical plates, and the upper surface of the injection molding main frame is away from the vertical plate. The injection molding system is provided at one end, and the injection molding system includes a sliding push frame slidably connected to the upper surface of the injection molding main frame. The present invention leaves a plurality of countersunk holes in the annular groove on the surface of the knob shell after the injection molding is completed, and then when the additional ring is injected, a part of the plastic will be drilled into the countersunk hole, that is, the knob shell and the additional ring are tightly fused to reduce the probability of falling off during later use.

Description

Technical Field

[0001] The invention relates to the technical field of two-color injection molding, in particular to a two-color runner injection molding mold for an automobile knob. Background Art

[0002] Injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise size. Injection mold is also a processing method used in mass production of parts, mainly used in the industrial field. The injection mold process is to inject the heated and melted material into the mold cavity under high pressure, and after cooling and solidification, a molded product is obtained;

[0003] Two-color injection molding is a process that uses two plastic materials of different colors or properties to be molded in the same injection mold. It is usually used to produce products with multiple colors or functions. It is commonly used in the fields of mobile phone casings, car interiors, home appliances, etc. The two-color injection molding process is more complicated than the single injection molding process.

[0004] After searching, it is found that in the prior art, two injection molds are often required to be set up and cooperate with a rotating disk to achieve precise injection molding when performing two-color injection molding. However, in the actual operation process, due to the repeated use of the turntable and related factors such as the response speed, the mold cannot be tightly closed with the next injection molding after rotation, resulting in more burrs and waste of raw materials in the injection molded products. Therefore, we propose a mold system that can be used for two-color injection molding of automotive knobs and can be precisely positioned. Summary of the invention

[0005] In view of the technical problem in the prior art that the rotating disk needs to be time-consuming and complicated to correct the centering after rotation during two-color injection molding, resulting in low injection efficiency, the present invention adopts the following technical solution:

[0006] A two-color runner injection mold for an automobile knob comprises an injection main frame, the upper surface of which is provided with two vertical plates at intervals, an annular groove is fixed between the two vertical plates, and an injection system is arranged on the injection main frame, the injection system comprises a sliding push frame slidably connected to the upper surface of the injection main frame, a male mold head 1 and a male mold head 2 are respectively fixed to the side of the sliding push frame close to the vertical plate, a rotary fixed ring is rotatably connected in the annular groove, and a mold base system is fixed to the side of the rotary fixed ring close to the injection system; the mold base system comprises an auxiliary positioning module arranged at the top of the vertical plate.

[0007] Preferably, the mold base system includes a main fixed plate seat fixed and vertically arranged at the ring mouth of a rotary fixed ring, and two congruent tubular positioning tubes are fixed to the side of the main fixed plate seat close to the male mold head, and the two positioning tubes are symmetrically distributed in the center; the two positioning tubes are fixed with auxiliary mold top plates at one end away from the main fixed plate seat, and the surface of the auxiliary mold top plate close to the injection molding system is respectively fixed with female mold clamps that are symmetrically distributed in the center; a plurality of convex rods are fixed to the side of the female mold clamp close to the injection molding system near the circumferential edge; a male mold groove is reserved on the side of the male mold head close to the female mold clamp, and an annular convex ridge is reserved at the bottom of the male mold groove near the circumferential edge, and a plurality of top rods coaxial with the convex rod are arranged at the end of the annular convex ridge away from the bottom of the groove.

[0008] Preferably, the injection molding system includes two channel steel slide rails with openings facing each other and parallel to each other fixed on the upper surface of the injection molding main frame, and the same power mechanism is slidably connected between the two channel steel slide rails, the output end of the power mechanism is fixed on the middle part of the side of the sliding push frame, and two groups of injection molding machines are fixed on the sliding push frame, and the injection ports of the two groups of injection molding machines are respectively provided with drainage mechanisms adapted to the jet ports of the male mold head one and the male mold head two; a rectangular notch is reserved in the horizontal plate of the injection molding main frame below the female mold clamp, and a collection box is provided below the rectangular notch; inclined rods are provided on the upper surface of the horizontal plate of the injection molding main frame on the side away from the injection molding system, close to the root of the vertical plate.

[0009] Preferably, a demoulding mechanism is provided in the middle of the two positioning tubes, and the demoulding mechanism comprises a tamping rod extending into the middle of the female mold clamp; a circular hole matching the diameter of the tamping rod is opened in the middle of the female mold clamp.

[0010] Preferably, spherical grooves distributed at equal distances are opened at the contact point between the circumferential outer wall of the rotary fixed ring and the bottom of the annular groove, and balls are clamped in the spherical grooves; worm gear teeth are reserved on the circumferential outer wall of the end of the rotary fixed ring away from the main fixed plate seat, and a servo motor is fixed to the vertical plate surface of the injection molding main frame near the top; a worm is fixed to the top of the output shaft of the servo motor through a coupling; a transmission tube is fixed to the end of the worm away from the servo motor through a coupling, and a bearing frame is provided on the surface of the annular groove near the middle of the transmission tube, and a tapered roller bearing matching the outer diameter of the transmission tube is clamped in the middle of the bearing frame; a permanent magnet is fixed to the end of the transmission tube away from the worm, and A rubber collar is fixed to the outer wall of the permanent magnet; two rail grooves with openings facing each other and parallel to each other are fixed on the surface of the vertical plate of the injection molding main frame near the end of the transmission tube, the extension direction of the two rail grooves is parallel to the axis of the transmission tube, and the same sliding card plate is slidably connected between the two rail grooves; an electromagnet is fixed on the surface of the sliding card plate; and a brake ring and a compression spring are respectively fixed at both ends of the electromagnet, and the brake ring and the rubber collar are coaxial and have the same thickness; a spring baffle is fixed at one end of the two rail grooves away from the rubber collar, and the other end of the compression spring is fixed on the spring baffle; when the electromagnet is energized, it will produce a repulsive effect with the permanent magnet.

[0011] Preferably, two symmetrical limit abutment plates are fixed at the ring mouth of one end of the rotary fixed ring away from the main fixed plate seat, and the lower surfaces of the two limit abutment plates are reserved with pressure blocks, and the connecting line of the two pressure blocks passes through the center of the circle; a detection base is fixed on the surface of one of the vertical plates of the injection molding main frame, close to the bottom of the servo motor, and a hard plate strip extending into the extrusion surface of the pressure block is reserved at the end of the detection base away from the vertical plate; pressure sensors are fixed on both sides of the hard plate strip, and the two pressure sensors are connected to a processor through signal lines, and the signal output end of the processor is connected to the control switch of the servo motor.

[0012] Preferably, positioning pins are fixed at two corners away from the axis line on the side of one of the auxiliary mold top plates away from the main fixed plate seat; and a sliding bearing is embedded on the side of the male mold head close to the auxiliary mold top plate, and the inner ring diameter of the sliding bearing is adapted to the diameter of the positioning pin.

[0013] Preferably, it also includes an injection-molded knob shell, wherein an annular groove is reserved near the circumferential edge on the side of the knob shell away from the auxiliary mold top plate, and a rectangular notch is reserved on the circumferential inner wall of the annular groove, and a directional protrusion matched with the rectangular notch is reserved on the circumferential inner wall of the additional ring; the injection molding port of the male mold head 2 is located in the middle position of the directional protrusion; a plurality of synapses are reserved on the side of the additional ring close to the bottom of the annular groove, and the synapses are matched with the corresponding countersunk hole size.

[0014] Preferably, the auxiliary positioning module includes a movable shaft fixed on the surfaces of the two vertical plates near the top ends, the two movable shafts are of the same height and symmetrical to each other, the circumferential outer walls of the two movable shafts are sleeved with anti-slip bearings, and the outer walls of the two anti-slip bearings are respectively fixed with symmetrical S-shaped clamping rods, the opposite ends of the bottom ends of the two S-shaped clamping rods are respectively fixed with symmetrical centering clamping blocks, and the opposite sides of the two centering clamping blocks are respectively provided with arc-shaped bayonet sockets that are compatible with the outer diameter of the positioning tube; the opposite sides of the top ends of the two S-shaped clamping rods are respectively provided with spherical grooves, and the two spherical grooves are rotatably connected with tough push rods, and the top ends of the tough push rods are reserved with steering balls, and the two S-shaped clamping rods are respectively provided with symmetrical centering clamping blocks. The opposite end of the tough push rod is rotatably connected to the same push rod rotating seat, and the top of the push rod rotating seat is fixed with the same toothed push rod extending vertically upward; the tops of the two vertical plates of the injection molding main frame are respectively fixed with mutually symmetrical folding brackets, and the same guide clamp is fixed between the tops of the two folding brackets, the top of the guide clamp is provided with a through hole running through the upper and lower ends, and both ends of the through hole are clamped with wear-resistant slip rings, and the toothed push rod is slidably connected between the two wear-resistant slip rings; the side of the guide clamp is provided with a gear groove, and the side of one of the folding brackets is fixed with a reduction motor, and the top of the output shaft of the reduction motor is fixed with a driving gear meshing with the toothed push rod.

[0015] Preferably, permanent magnet blocks that attract each other are respectively arranged on the sides of the top ends of the two centering clamping blocks that are close to each other.

[0016] The beneficial effects of the present invention are:

[0017] 1. By setting the positioning trustee and auxiliary positioning module, it is possible to ensure that the upper and lower female mold heads are aligned with the male mold head 1 and the male mold head 2 respectively before injection molding. Then, after the mold is closed, the ejector rod that is coaxial with the convex rod and the bottom of the male mold groove can be used to leave multiple countersunk holes in the annular groove on the surface of the knob shell after the injection molding is completed. When the additional ring is injected, part of the plastic will drill into the countersunk holes, that is, the knob shell and the additional ring are tightly fused to reduce the probability of falling off during later use.

[0018] 2. By setting the tamping rod and demoulding mechanism, in cooperation with the second male mold head set at the bottom, after completing the injection molding of the last step of the additional ring, the tamping rod can be directly controlled to push out the knob housing and the additional ring that are locked together and push them out together and drop them into the collection box below.

[0019] 3. By setting a toothed top rod and two tough top rods hinged at its bottom end, when the toothed top rod descends, the two centering clamping blocks combined together separate. When it is necessary to clamp and center the positioning bracket to rotate to the top, it is only necessary to control the toothed top rod to rise again. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention before mold closing;

[0021] Figure 2 It is a schematic diagram of the structure of the other side of the present invention before mold closing;

[0022] Figure 3 It is a side view of the present invention during injection molding;

[0023] Figure 4 This is a front view of the present invention after demoulding after injection molding is completed;

[0024] Figure 5 It is a structural schematic diagram of the mold base system in the present invention during rotation and transposition;

[0025] Figure 6 It is a schematic diagram of the structure of the other side of the mold base system during rotation and transposition in the present invention;

[0026] Figure 7 It is a schematic diagram of the exploded structure of the mold base system in the present invention;

[0027] Figure 8 It is a schematic diagram of the exploded structure of the knob housing of the present invention;

[0028] Fig. 9 It is a semi-sectioned three-dimensional structural schematic diagram of the mold base system in the present invention;

[0029] Fig.10 It is a schematic diagram of the overall structure of the auxiliary positioning module in the present invention;

[0030] Fig.11 It is a schematic diagram of a half-section structure after injection molding is completed but before the finished product is ejected in the present invention;

[0031] Fig.12 For the present invention Fig.11 Schematic diagram of the cross-sectional structure of the middle knob housing and the additional ring.

[0032] In the figure: 1. Injection molding main frame; 101. Vertical plate; 102. Arc-shaped mounting groove; 2. S-shaped clamping rod; 3. Movable shaft; 4. Folding bracket; 5. Speed ​​reducer; 6. Guide clamp; 7. Toothed ejector rod; 8. Tough ejector rod; 9. Auxiliary positioning module; 10. Positioning pin rod; 11. Male mold head 1; 1101. Male mold groove; 12. Injection molding system; 1201. Power mechanism; 1202. Sliding push frame; 13. Mold base system; 14. Male mold head 2; 15. Knob housing; 151. Annular groove; 152. Synapse; 153. Pointing bump ; 154, additional ring; 16, auxiliary mold top plate; 17, positioning trustee; 18, main fixed plate seat; 19, sliding card plate; 20, card rail groove; 21, electromagnet; 22, annular card groove; 23, demoulding mechanism; 24, rotating fixed ring; 2401, ball; 25, detection base; 26, limit plate; 27, servo motor; 28, worm; 29, driving gear; 30, top rod rotating seat; 31, transmission tube; 32, rubber ring; 33, centering clamping block; 3301, permanent magnet block; 34, mother mold clamp; 341, convex rod. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In this embodiment, refer to Figure 1-Figure 12A two-color flow channel injection mold for a car knob includes an injection main frame 1, two vertical plates 101 are arranged at intervals on the upper surface of the injection main frame 1, arc-shaped mounting grooves 102 are opened on opposite sides of the two vertical plates 101, and the same annular groove 22 is fixed between the two arc-shaped mounting grooves 102, the axis of the annular groove 22 is parallel to the horizontal plane, and an injection molding system 12 is arranged on the upper surface of the injection main frame 1 away from the vertical plate 101, and the injection molding system 1 2 comprises a sliding push frame 1202 slidably connected to the upper surface of the injection molding main frame 1, and the sliding push frame 1202 is respectively fixed with a male mold head 11 and a male mold head 2 14 on one side close to the vertical plate 101, and the male mold head 2 14 is located directly below the male mold head 11; a rotary fixed ring 24 is rotatably connected in the annular groove 22, and a mold base system 13 is fixed on the side of the rotary fixed ring 24 close to the injection molding system 12, and the mold base system 13 includes a mold base system 13 arranged at the top of the two vertical plates 101 for The auxiliary positioning module 9 is used to clamp and fix the positioning trustee 17 in the middle position; the mold base system 13 includes a main fixed plate seat 18 fixed to the ring mouth of the rotary fixed ring 24 and vertically arranged, and two positioning trustees 17 of congruent tubular structure are fixed on the side of the main fixed plate seat 18 close to the male mold head 11, and the two positioning trustees 17 are symmetrically distributed in the center; the ends of the two positioning trustees 17 away from the main fixed plate seat 18 are fixed with auxiliary mold top plates 16, and the surfaces of the side of the auxiliary mold top plates 16 close to the injection molding system 12 are respectively fixed with female mold clamps 34 that are symmetrically distributed in the center; a plurality of convex rods 341 are fixed to the side of the female mold clamp 34 close to the injection molding system 12 near the circumferential edge; a male mold groove 1101 is reserved on the side of the male mold head 11 close to the female mold clamp 34, and an annular convex ridge is reserved at the bottom of the male mold groove 1101 near the circumferential edge, and a plurality of top rods coaxial with the convex rod 341 are arranged at the end of the annular convex ridge away from the bottom of the groove;

[0035] By setting the positioning trustee 17 and the auxiliary positioning module 9, it is possible to ensure that the upper and lower female mold clamps 34 are aligned with the male mold head 11 and the male mold head 2 14 respectively before injection molding, and then after the mold is closed, the bottom of the male mold groove 1101 is matched with the top rod coaxial with the protruding rod 1 341, so that after the injection molding of the knob shell 15 is completed, a plurality of countersunk holes can be left in the annular groove 151 on its surface. When the additional ring 154 is injected, part of the plastic will drill into the countersunk holes, so that the knob shell 15 and the additional ring 154 are tightly fused to reduce the probability of falling off during later use.

[0036] The injection molding system 12 includes two channel steel slide rails with openings facing each other and parallel to each other fixed on the upper surface of the injection molding main frame 1, and the same power mechanism 1201 is slidably connected between the two channel steel slide rails, and the output end of the power mechanism 1201 is fixed to the middle part of the side of the sliding push frame 1202, and two groups of injection molding machines are fixed on the sliding push frame 1202, and the injection ports of the two groups of injection molding machines are respectively provided with drainage mechanisms adapted to the jet ports of the male mold head 11 and the male mold head 2 14; so as to keep the plastic in the molten state in a high-temperature fluid state and inject it into the male mold head 11 and the male mold head 2 14 at a uniform speed.

[0037] Reference Figure 1 and Figure 5 A rectangular notch is reserved in the horizontal plate of the injection molding main frame 1 below the female mold clamp 34, and a collection box is arranged below the rectangular notch; a diagonal tie rod is arranged on the upper surface of the horizontal plate on the side of the injection molding main frame 1 away from the injection molding system 12, near the root of the vertical plate 101, to reinforce the overall device.

[0038] Reference Figure 11-Figure 12 A demoulding mechanism 23 is provided in the middle of the two positioning trustees 17, and the demoulding mechanism 23 includes a tamping rod extending into the middle of the female mold clamp 34; a circular hole matching the diameter of the tamping rod is opened in the middle of the female mold clamp 34; through the tamping rod and the demoulding mechanism 23, in cooperation with the male mold head 14 provided below, after completing the injection molding of the last step of the additional ring 154, the tamping rod can be directly controlled to push out, so that the knob housing 15 and the additional ring 154 that are clamped together can be pushed out together and fall into the collection box below.

[0039] Reference Figure 3 , Figure 6 and Figure 7The spherical grooves distributed at equal distances are opened at the contact point between the circumferential outer wall of the rotary fixed ring 24 and the bottom of the annular groove 22, and the balls 2401 are clamped in the spherical grooves; the circumferential outer wall of the end of the rotary fixed ring 24 away from the main fixed plate seat 18 is reserved with worm gear teeth, and a servo motor 27 is fixed near the top of the vertical plate 101 surface of the injection molding main frame 1; a worm 28 is fixed to the top of the output shaft of the servo motor 27 through a coupling; a transmission tube 31 is fixed to the end of the worm 28 away from the servo motor 27 through a coupling, and a bearing frame is provided on the surface of the annular groove 22 near the middle of the transmission tube 31, and a tapered roller bearing matching the outer diameter of the transmission tube 31 is clamped in the middle of the bearing frame; a permanent magnet is fixed to the end of the transmission tube 31 away from the worm 28, and a rubber ring 32 is fixed on the outer wall of the permanent magnet; two openings are fixed on the surface of the vertical plate 101 of the injection molding main frame 1 near the end of the transmission tube 31, which are opposite to each other. Parallel rail grooves 20, the extension direction of the two rail grooves 20 is parallel to the axial line of the transmission tube 31, and the same sliding card plate 19 is slidably connected between the two rail grooves 20; an electromagnet 21 is fixed on the surface of the sliding card plate 19; and a brake ring and a compression spring are fixed at both ends of the electromagnet 21, and the brake ring is coaxial with the rubber retaining ring 32 and has the same thickness; a spring baffle is fixed at one end of the two rail grooves 20 away from the rubber retaining ring 32, and the other end of the compression spring is fixed on the spring baffle; when the electromagnet 21 is energized, it will repel the permanent magnet, at which time the rubber retaining ring 32 can be separated from the brake ring, and when the electromagnet 21 loses power, the brake ring and the rubber retaining ring 32 are quickly brought into contact with each other under the suction of the compression spring and the permanent magnet, which plays the role of axial tightening and radial fixing on the worm 28, thereby preventing the rotary fixed ring 24 from continuing to rotate and playing the role of precise positioning.

[0040] Reference Figure 2-Figure 3 Two symmetrical limit abutment plates 26 are fixed at the ring mouth of the end of the rotary fixed ring 24 away from the main fixed plate seat 18, and the lower surfaces of the two limit abutment plates 26 are reserved with pressure blocks, and the connecting line of the two pressure blocks passes through the center of the circle; a detection base 25 is fixed on the surface of one of the vertical plates 101 of the injection molding main frame 1, close to the bottom of the servo motor 27, and a hard plate strip extending into the extrusion surface of the pressure block is reserved at the end of the detection base 25 away from the vertical plate 101; pressure sensors are fixed on both sides of the hard plate strip, and the two pressure sensors are connected to the processor through signal lines, and the signal output end of the processor is connected to the control switch of the servo motor 27. Through the two pressure blocks and the pressure sensors on both sides of the hard plate strip, when in use, when the worm 28 drives the rotary fixed ring 24 to rotate one hundred and eighty degrees, it can stop immediately.

[0041] Reference Figure 1 , Figure 4 , Figure 7 and Fig.11, positioning pins 10 are fixed at two corners away from the axis line on one side of an auxiliary mold top plate 16 away from the main fixed plate seat 18; and a sliding bearing is embedded on the side of the male mold head 11 close to the auxiliary mold top plate 16, and the inner ring diameter of the sliding bearing is adapted to the diameter of the positioning pin 10, which can make the mold closing more precise.

[0042] Reference Figure 8 , Fig. 9 and Fig.11 , and also includes an injection-molded knob shell 15, a side of the knob shell 15 away from the auxiliary mold top plate 16 is reserved with an annular groove 151 near the circumferential edge, and the circumferential inner wall of the annular groove 151 is reserved with a rectangular notch, and the circumferential inner wall of the additional ring 154 is reserved with a directional protrusion 153 adapted to the rectangular notch; the injection molding port of the male mold head 14 is located in the middle position of the directional protrusion 153; the additional ring 154 is close to the bottom of the annular groove 151. A plurality of synapses 152 are reserved, and the synapses 152 are adapted to the corresponding countersunk hole size; through such an arrangement, the excess handle can be cut or the protruding part can be smoothed after the injection molding is completed to avoid damaging other positions.

[0043] Reference Figure 5 , Figure 6 and Fig.10The auxiliary positioning module 9 includes a movable shaft 3 fixed on the surface of two vertical plates 101 of the injection molding main frame 1 near the top, the two movable shafts 3 are of the same height and symmetrical to each other, the circumferential outer walls of the two movable shafts 3 are sleeved with anti-slip bearings, and the outer walls of the two anti-slip bearings are respectively fixed with symmetrical S-shaped clamping rods 2, the opposite ends of the bottom ends of the two S-shaped clamping rods 2 are respectively fixed with symmetrical centering clamping blocks 33, and the opposite sides of the two centering clamping blocks 33 are respectively provided with arc-shaped bayonet sockets adapted to the outer diameter of the positioning hosting tube 17; the opposite sides of the top ends of the two S-shaped clamping rods 2 are provided with spherical grooves, and the two spherical grooves are rotatably connected with tough push rods 8, and the top ends of the tough push rods 8 are reserved with steering balls, and the opposite ends of the two tough push rods 8 are rotatably connected with the same push rod rotating seat 30, and the top of the push rod rotating seat 30 is fixed with the same toothed plate extending vertically upward. Push rod 7; the tops of the two vertical plates 101 of the injection molding main frame 1 are respectively fixed with symmetrical folding brackets 4, and the same guide clamp 6 is fixed between the tops of the two folding brackets 4, the top of the guide clamp 6 is provided with a through hole running through the upper and lower ends, and both ends of the through hole are clamped with wear-resistant slip rings, and the toothed push rod 7 is slidably connected between the two wear-resistant slip rings; the side of the guide clamp 6 is provided with a gear groove, and the side of one of the folding brackets 4 is fixed with a reduction motor 5, and the top of the output shaft of the reduction motor 5 is fixed with a driving gear 29 that meshes with the toothed push rod 7; through the toothed push rod 7 and the two tough push rods 8 hinged at the bottom end thereof, when the toothed push rod 7 is lowered, the two combined centering clamping blocks 33 are separated, and when it is necessary to clamp and center the positioning bracket 17 that is rotated to the top, it is only necessary to control the toothed push rod 7 to rise again.

[0044] Reference Figure 5 The two sides of the top of the two centering clamping blocks 33 that are close to each other are respectively provided with permanent magnetic blocks 3301 that attract each other, which can increase the clamping force during clamping.

[0045] When the device is in use, first control the power mechanism 1201 to withdraw the sliding push frame 1202 from the injection position, and then fix the male mold head 11 and the male mold head 2 14 to the outlet end of the drainage mechanism. In order to have a clearer understanding of the shape inside the mold, this embodiment only designs a finished product. In the actual process, multiple knob shells 15 can be injection-molded at one time; then install the two female mold clamps 34 to the corresponding positions; then start the servo motor 27 on the side; through the two pressure blocks and the pressure sensors on both sides of the hard board strip, when in use, when the worm 28 drives the rotating fixed ring 24 to rotate one hundred and eighty degrees, it can stop immediately; at the same time, it is necessary to clamp the positioning tube 17 rotated to the top end, and through the toothed top rod 7 and the two tough top rods 8 hinged at its bottom end, it is only necessary to control the reduction motor 5 to reverse to drive the toothed The push rod 7 can be raised, and at this time, the two tough push rods 8 will open the two S-shaped clamping rods 2 to both sides, and the two centering clamping blocks 33 at the bottom end thereof will run in the opposite direction to the middle to clamp the positioning trustee 17 to the middle position for precise mold closing; then injection molding can be carried out; by setting the positioning trustee 17 and the auxiliary positioning module 9, it is possible to ensure that the upper and lower female mold clamping heads 34 are respectively aligned with the male mold head 11 and the male mold head 2 14 before injection molding, and then after mold closing, with the push rod that is coaxial with the bottom of the male mold groove 1101 and the protruding rod 1 341, a plurality of countersunk holes can be left in the annular groove 151 on its surface after the injection molding of the knob shell 15 is completed, and then when the additional ring 154 is injected, a part of the plastic will drill into the countersunk hole, that is, the knob shell 15 and the additional ring 154 are tightly fused to reduce the probability of falling off during later use.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A two-color runner injection mold for automobile knobs, characterized in that: The invention comprises an injection molding main frame (1), wherein two vertical plates (101) are arranged at intervals on the upper surface of the injection molding main frame (1), an annular groove (22) is fixed between the two vertical plates (101), and an injection molding system (12) is arranged on the injection molding main frame (1), wherein the injection molding system (12) comprises a sliding push frame (1202) slidably connected to the upper surface of the injection molding main frame (1), a male mold head 1 (11) and a male mold head 2 (14) are respectively fixed on one side of the sliding push frame (1202) close to the vertical plates (101), a rotary fixed ring (24) is rotatably connected in the annular groove (22), and a mold base system (13) is fixed on one side of the rotary fixed ring (24) close to the injection molding system (12); the mold base system (13) comprises an auxiliary positioning module (9) arranged on the top of the vertical plates (101); The mold base system (13) comprises a main fixed plate seat (18) fixed at the ring opening of a rotary fixed ring (24) and arranged vertically, and two positioning trustees (17) of congruent tubular structure are fixed on one side of the main fixed plate seat (18) close to the male mold head (11), and the two positioning trustees (17) are symmetrically distributed in the center; the ends of the two positioning trustees (17) away from the main fixed plate seat (18) are fixed with auxiliary mold top plates (16), and the auxiliary mold top plates (16) are close to the injection molding system (12). The female mold clamps (34) are fixed to one side surface thereof and are symmetrically distributed with respect to the center; a plurality of protruding rods (341) are fixed to the female mold clamp (34) on one side close to the injection molding system (12) and close to the circumferential edge; a male mold groove (1101) is reserved on the male mold head (11) on one side close to the female mold clamp (34), and an annular convex ridge is reserved at the bottom of the male mold groove (1101) and close to the circumferential edge, and a plurality of ejector rods coaxial with the protruding rod (341) are arranged at one end of the annular convex ridge away from the bottom of the groove.

2. The automobile knob two-color runner injection mold according to claim 1, characterized in that: The injection molding system (12) comprises two channel steel slide rails fixed on the upper surface of the injection molding main frame (1), the openings of which are opposite to each other and parallel to each other, and the same power mechanism (1201) is slidably connected between the two channel steel slide rails, the output end of the power mechanism (1201) is fixed to the middle part of the side of the sliding push frame (1202), and two groups of injection molding machines are fixed on the sliding push frame (1202), and the injection ports of the two groups of injection molding machines are respectively provided with drainage mechanisms adapted to the injection ports of the male mold head 1 (11) and the male mold head 2 (14); a rectangular notch is reserved on the horizontal plate of the injection molding main frame (1) below the female mold clamp (34), and a collection box is provided below the rectangular notch; and a diagonal tie rod is provided on the upper surface of the horizontal plate of the injection molding main frame (1) on the side away from the injection molding system (12) near the root of the vertical plate (101).

3. The automobile knob two-color runner injection mold according to claim 2, characterized in that: A demoulding mechanism (23) is provided in the middle of the two positioning brackets (17), and the demoulding mechanism (23) comprises a tamping rod extending into the middle of the female mold clamp (34); a circular hole matching the diameter of the tamping rod is opened in the middle of the female mold clamp (34).

4. The automobile knob two-color runner injection mold according to claim 3, characterized in that: The spherical grooves are arranged at equal distances at the contact point between the circumferential outer wall of the rotary fixing ring (24) and the groove bottom of the annular groove (22), and the spherical grooves are clamped with balls (2401); the circumferential outer wall of the end of the rotary fixing ring (24) away from the main fixing plate seat (18) is reserved with worm gear teeth, and a servo motor (27) is fixed near the top of the surface of the vertical plate (101) of the injection molding main frame (1); a worm (28) is fixed to the top of the output shaft of the servo motor (27) through a coupling; a transmission tube (31) is fixed to the end of the worm (28) away from the servo motor (27) through a coupling, and a bearing frame is arranged near the middle of the transmission tube (31) on the surface of the annular groove (22), and a tapered roller bearing matching the outer diameter of the transmission tube (31) is clamped in the middle of the bearing frame; a permanent magnet is fixed to the end of the transmission tube (31) away from the worm (28). The invention relates to a permanent magnet body, and a rubber retaining ring (32) is fixed to the outer wall of the permanent magnet; two rail grooves (20) with openings facing each other and parallel to each other are fixed on the surface of the vertical plate (101) of the injection molding main frame (1) near the end of the transmission tube (31), the extension direction of the two rail grooves (20) is parallel to the axis of the transmission tube (31), and the same sliding card plate (19) is slidably connected between the two rail grooves (20); an electromagnet (21) is fixed to the surface of the sliding card plate (19); and a brake ring and a compression spring are respectively fixed at both ends of the electromagnet (21), and the brake ring and the rubber retaining ring (32) are coaxial and have the same thickness; a spring baffle is fixed to one end of the two rail grooves (20) away from the rubber retaining ring (32), and the other end of the compression spring is fixed to the spring baffle; when the electromagnet (21) is energized, it will produce a repulsive effect with the permanent magnet.

5. The automobile knob two-color runner injection mold according to claim 4, characterized in that: Two symmetrical limit plates (26) are fixed at the ring opening of one end of the rotary fixed ring (24) away from the main fixed plate seat (18), and the lower surfaces of the two limit plates (26) are reserved with a pressure block, and the connecting line of the two pressure blocks passes through the center of the circle; a detection base (25) is fixed on the surface of one of the vertical plates (101) of the injection molding main frame (1) below the servo motor (27), and a hard plate strip extending into the extrusion surface of the pressure block is reserved at one end of the detection base (25) away from the vertical plate (101); pressure sensors are fixed on both sides of the hard plate strip, and the two pressure sensors are connected to a processor through signal lines, and the signal output end of the processor is connected to the control switch of the servo motor (27).

6. The automobile knob two-color runner injection mold according to claim 5, characterized in that: Positioning pins (10) are fixed at two corners of one of the auxiliary mold top plates (16) away from the main fixed plate seat (18) and away from the axis; and a sliding bearing is embedded on the side of the male mold head (11) close to the auxiliary mold top plate (16), and the inner ring diameter of the sliding bearing is matched with the diameter of the positioning pin (10).

7. The automobile knob two-color runner injection mold according to claim 6, characterized in that: It also includes an injection-molded knob shell (15), wherein an annular groove (151) is reserved near the circumferential edge of the knob shell (15) on one side away from the auxiliary mold top plate (16), and a rectangular notch is reserved on the circumferential inner wall of the annular groove (151), and a pointing protrusion (153) matching the rectangular notch is reserved on the circumferential inner wall of the additional ring (154); the injection port of the male mold head (14) is located in the middle of the pointing protrusion (153); and a plurality of synapses (152) are reserved on one side of the additional ring (154) close to the bottom of the annular groove (151), and the synapses (152) are matched with the corresponding countersunk hole size.

8. The automobile knob two-color runner injection mold according to claim 7, characterized in that: The auxiliary positioning module (9) comprises a movable shaft (3) fixed on the surface of two vertical plates (101) near the top, the two movable shafts (3) are of equal height and symmetrical to each other, the circumferential outer walls of the two movable shafts (3) are sleeved with anti-slip bearings, and the outer walls of the two anti-slip bearings are respectively fixed with symmetrical S-shaped clamping rods (2), the opposite ends of the bottom ends of the two S-shaped clamping rods (2) are respectively fixed with symmetrical centering clamping blocks (33), and the opposite sides of the two centering clamping blocks (33) are respectively provided with arc-shaped bayonet holes adapted to the outer diameter of the positioning bracket (17); the opposite sides of the top ends of the two S-shaped clamping rods (2) are respectively provided with spherical grooves, and the two spherical grooves are rotatably connected with a resilient push rod (8), the top ends of the resilient push rods (8) are each reserved with a steering ball, and the two resilient push rods (8) are mutually One end of the pair is rotatably connected to a same push rod rotating seat (30), and a same toothed push rod (7) extending vertically upward is fixed to the top of the push rod rotating seat (30); the tops of the two vertical plates (101) of the injection molding main frame (1) are respectively fixed with mutually symmetrical folding brackets (4), and a same guide clamp (6) is fixed between the tops of the two folding brackets (4), the top of the guide clamp (6) is provided with a through hole penetrating through the upper and lower ends, and both ends of the through hole are clamped with wear-resistant slip rings, and the toothed push rod (7) is slidably connected between the two wear-resistant slip rings; the side of the guide clamp (6) is provided with a gear groove, and a reduction motor (5) is fixed to the side of one of the folding brackets (4), and the top of the output shaft of the reduction motor (5) is fixed with a driving gear (29) meshing with the toothed push rod (7).

9. The automobile knob two-color runner injection mold according to claim 8, characterized in that: Permanent magnetic blocks (3301) that attract each other are respectively arranged on the sides of the top ends of the two centering clamping blocks (33) that are close to each other.

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