Multi-color multi-station mold

Abstract

The application provides a multi-color multi-station mold, and belongs to the technical field of lamp forming. The multi-color multi-station mold can solve the problems of low rotation precision and low forming quality of the existing multi-station mold. The multi-color multi-station mold comprises a fixed mold, a movable mold and a main shaft. The fixed mold has a fixed mold cavity on the side surface. The movable mold has a movable mold cavity on the side surface. The main shaft is fixed with a plurality of rotating cores which are uniformly distributed in the circumferential direction at one end of the main shaft. The rotating cores are columnar and are arranged in the radial direction of the main shaft. The fixed mold cavity and the movable mold cavity both have notches which penetrate in the direction of the main shaft. When the movable mold and the fixed mold are in the mold closing state, the rotating cores are located between the fixed mold cavity and the movable mold cavity, and the two notches act on the outside of the rotating cores to form a closed injection cavity between the fixed mold cavity, the movable mold cavity and the rotating cores. When the movable mold is in the mold opening state, the main shaft can slide axially and rotate circumferentially relative to the movable mold. The multi-color multi-station mold can improve the forming quality of the product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicle lamp forming, and relates to a multi-color multi-station mold. BACKGROUND

[0002] Some existing vehicle lamp products are transparent thick-walled parts, and one-time injection molding directly causes a long forming cycle, so the products are subjected to layered injection molding, and the more the layers are, the shorter the cycle is and the higher the production efficiency is. For example, if the product is divided into three layers, a three-color three-station injection molding machine is used to first inject one layer, then rotate by 120 DEG to inject the second layer, and then rotate by 120 DEG to inject the third layer. Therefore, the mold needs to have a rotating function, that is, a motor is designed on the mold to rotate the movable mold. When the first color product is solidified and formed, the movable mold needs to be rotated to change the cavity, so that the first color product enters the cavity for injection of the second color.

[0003] For example, a layered injection molding mold for thick-walled products disclosed in a patent document (application number: 201810157185.5) includes an upper mold, a lower mold, a rotating plate, a driving device, and a rotating device. At least one first injection cavity and at least one second injection cavity are arranged on the rotating plate. At least one first glue inlet and at least one second glue inlet are formed on the upper mold. The rotating plate is connected with a rotating shaft at the bottom. The rotating shaft passes through the lower mold and extends from the bottom of the lower mold. The driving device drives the rotating shaft to move up and down, thereby driving the rotating plate to move up and down. The rotating device drives the rotating shaft to rotate, thereby driving the rotating plate to rotate. After the first layer is injected, it is automatically rotated to the corresponding position for the second layer injection, thereby realizing the layered injection molding of the thick-walled product in the same mold. The mold changes the cavity by rotating the rotating plate provided with the cavity. Since multiple cavities need to be formed on the rotating plate, the area and thickness of the rotating plate are large. In addition, since the cavities are directly formed, the steel quality of the rotating plate is required to be high. These all result in a large weight of the rotating plate, which is supported on the rotating shaft and driven to lift and rotate by the rotating shaft. The large weight results in low rotation precision. In addition, long-term use causes large wear of the rotating parts on the rotating shaft, thereby reducing the overall reliability and precision and affecting the forming quality of the product. SUMMARY

[0004] The application aims to solve the problems of low rotation precision and low forming quality of the existing multi-station mold.

[0005] The purpose of the present application can be realized by the following technical solutions: a multi-color multi-station mold, comprising a fixed mold, a movable mold and a main shaft passing through the movable mold and capable of moving synchronously with the movable mold, wherein the fixed mold side has a plurality of fixed mold cavities distributed around the main shaft, and the movable mold side has a plurality of movable mold cavities distributed around the main shaft, characterized in that the end of the main shaft towards the fixed mold is fixed with a plurality of rotating cores uniformly distributed in the circumferential direction, the rotating cores are columnar and are arranged radially along the main shaft, and the fixed mold cavities and the movable mold cavities each have a notch penetrating in the direction of the main shaft, when the movable mold and the fixed mold are in a closed mold state, the rotating cores are located between the fixed mold cavities and the movable mold cavities, and the two notches act on the outside of the rotating cores to form a closed injection cavity between the fixed mold cavities, the movable mold cavities and the rotating cores, and when the movable mold is in an open mold state, the main shaft can slide axially and rotate circumferentially relative to the movable mold.

[0006] When injecting a multi-color product, the movable mold and the fixed mold are in a closed mold state, and the rotating cores are arranged in the injection cavity through the two notches, the injection machine injects the first color molten plastic into one of the injection cavities, and after solidification, the first color product is formed, which wraps the rotating core positioned in the injection cavity, then the movable mold and the main shaft move away from the fixed mold synchronously to realize opening, then the main shaft moves towards the fixed mold relative to the movable mold, and the rotating core can take the first color product out of the movable mold, then the main shaft rotates the rotating core relative to the movable mold by a set angle, for example, if the mold is a three-color three-station mold, it rotates 120 degrees, so that the rotating core with the first color product rotates to the second color station, then the main shaft moves relative to the movable mold to reset, and then the mold is closed, so that the first color product is located in the second color injection cavity, the injection machine injects the second color molten plastic into the second color injection cavity, and the original first color injection cavity continues to inject the first color molten plastic, and after the second color product is solidified, the above process is repeated for the third color product injection, so that the injection of three colors of molten plastic is carried out at the same time, improving the production efficiency. The rotating core on the main shaft is connected, that is, the main shaft rotates the product through the rotating core to position the product and rotate to change the station, compared with the existing direct rotation of the movable mold or the mold plate to rotate the product to switch stations, the rotating core on the main shaft is columnar, small in volume and light in weight, but can position and support the product for rotation to change the station, so that the travel accuracy and position accuracy during rotation are higher, the driving force required is smaller due to the smaller load on the main shaft, the wear of the rotating parts on the main shaft is smaller during long-term use, the main shaft itself is more stable and has higher accuracy, and the forming quality of the product is improved.

[0007] In the multi-color multi-station mold, the fixed mold comprises a plurality of fixed mold inserts distributed around the main shaft, the fixed mold cavity is arranged on the fixed mold insert, the movable mold comprises a plurality of movable mold inserts distributed around the main shaft, the movable mold cavity is arranged on the movable mold insert, and the outer side surface of the rotating core has a gap between the inner wall of the fixed mold cavity and the movable mold cavity when the movable mold and the fixed mold are in the closed mold state. Compared with the fixed mold and the movable mold, the fixed mold insert and the movable mold insert have smaller volume, which facilitates higher precision processing of the fixed mold cavity and the movable mold cavity, improves product quality, and the gap between the rotating core and the inner wall of the fixed mold cavity and the movable mold cavity enables the product to be wrapped on the rotating core, and the positioning of the product by the rotating core is more stable. The opening of the fixed mold cavity and the movable mold cavity is opposite, which facilitates the product to be separated from the fixed mold cavity when the mold is opened and the product to be separated from the movable mold cavity when the main shaft moves axially relative to the movable mold.

[0008] In the multi-color multi-station mold, the one end of the rotating core is vertically fixed on the installation surface, and the other end can be inserted into the injection cavity. By installing multiple rotating cores through the installation seat, the installation surface can ensure the position accuracy of the rotating core and improve the product forming quality.

[0009] In the multi-color multi-station mold, the installation surface is further connected with a top plate, the top plate is provided with an avoiding hole, one side surface of the top plate can be attached to the installation surface, the rotating core passes through the avoiding hole, and the hole wall of the avoiding hole can be attached to the outer peripheral surface of the rotating core close to the installation surface. The top plate is provided for ejecting the product after forming to realize blanking, the side surface of the top plate is attached to the installation surface to keep the top plate stable, and the outer peripheral surface of the rotating core is attached to the hole wall of the avoiding hole of the top plate to keep and position the rotating core, thereby ensuring the stability of the rotating core.

[0010] In the multi-color multi-station mold, the other side surface of the top plate is provided with an annular positioning convex edge, the positioning convex edge is arranged around the avoiding hole, the inner peripheral surface of the positioning convex edge is coplanar with the hole wall of the avoiding hole, the outer peripheral surface of the positioning convex edge is a tapered surface with a small end outward, the recess is circular, and the inner diameter of the recess gradually increases from inside to outside, and when the rotating core extends into the injection cavity, the inner peripheral surface of the two recesses is attached to the outer peripheral surface of the positioning convex edge. When the movable mold and the fixed mold are closed, the inner peripheral surface of the two recesses is pressed against the outer peripheral surface of the positioning convex edge, and the two are tapered surface matched, which can press the top plate against the installation surface to ensure the position accuracy of the top plate. The hole wall of the avoiding hole of the top plate and the inner peripheral surface of the positioning convex edge cooperate with the outer peripheral surface of the rotating core to ensure the position accuracy and stability of the rotating core, thereby avoiding the decrease in stability of the columnar rotating core due to the reduction of the load of the main shaft.

[0011] In the above multi-color multi-station mold, the outer side of the movable mold block is vertically fixed with two positioning columns, and the two positioning columns are respectively located on both sides of the movable mold cavity; the outer side of the fixed mold block is provided with two matching holes, and the two matching holes are respectively located on both sides of the fixed mold cavity; when the movable mold and the fixed mold are combined, the two positioning columns are respectively inserted into the two matching holes. When the movable mold and the fixed mold are combined, the positioning columns on the movable mold are inserted into the matching holes on the fixed mold, so that the fitting precision of the movable mold and the fixed mold is higher, especially the two positioning columns and the two matching holes are respectively located on both sides of the injection cavity, which ensures the precision of the injection cavity and improves the molding quality.

[0012] In the above multi-color multi-station mold, the mounting surface is provided with a mounting hole, and two fixing grooves are also provided on the mounting surface, the two fixing grooves are respectively located on both sides of the mounting hole, and both the two fixing grooves penetrate the mounting hole wall; the end of the rotating core facing the mounting seat is provided with two clamping grooves on the outer side; the end of the rotating core is inserted into the mounting hole, and the two clamping grooves are respectively opposite to the two fixing grooves; the fixing block is fixed in the fixing groove through a bolt; the fixing block is inserted into the clamping groove and tightly fixes the end of the rotating core in the mounting hole. When assembling, the end of the rotating core is inserted into the mounting hole, so that the clamping groove is opposite to the fixing groove, the fixing block is embedded in the fixing groove, and then it is moved and clamped into the clamping groove, that is, the fixing block is tightly pressed on the groove wall of the clamping groove, the fixing block is locked by the bolt, and the fixing block tightly presses the rotating core on the inner surface of the mounting hole, realizing the fixation of the rotating core and ensuring its stability.

[0013] In the above multi-color multi-station mold, the mounting seat is an equilateral triangle in cross section along the radial direction of the main shaft, and the mounting seat has three mounting surfaces; the side of the movable mold facing the fixed mold is provided with a yield slot with an equilateral triangular cross section; the center of the yield slot is provided with a shaft hole; the main shaft passes through the shaft hole; and the mounting seat can be embedded into the yield slot, and the inner end surface of the mounting seat abuts against the bottom surface of the yield slot when the rotating core is located in the movable mold cavity. The mold is a three-color three-station mold, and a single product is formed by three times of layered injection molding. The yield slot is provided, so that the mounting seat abuts against the bottom surface of the yield slot during mold opening, and the two are more stable.

[0014] In the above multi-color multi-station mold, the inner end surface of the mounting seat is provided with three guide holes, and the three guide holes are respectively located at the three sharp corners of the inner end surface of the mounting seat; the bottom surface of the yield slot is vertically fixed with three guide columns; when the mounting seat is embedded into the yield slot, the three guide columns are respectively slidably inserted into the three guide holes. The guide columns and the guide holes are matched and guided, the mounting seat with relatively large weight on the main shaft is supported, and then the position precision and stability of the mounting seat and the rotating core after the movement of the main shaft are ensured.

[0015] In the above multi-color multi-station mold, the wear-resistant sleeve is fixed in the shaft hole, the sliding sleeve is sleeved on the main shaft, a plurality of balls are embedded on the sliding sleeve, the balls protrude from the inner and outer circumferential surfaces of the sliding sleeve, and the balls abut against the outer circumferential surface of the main shaft and the inner circumferential surface of the wear-resistant sleeve, the sliding sleeve is axially positioned with the main shaft, and the main shaft can rotate circumferentially relative to the sliding sleeve, and the sliding sleeve is circumferentially positioned with the movable mold and can axially slide in the shaft hole. Through the ball setting on the sliding sleeve, the main shaft rotates circumferentially relative to the sliding sleeve, and the sliding sleeve moves axially relative to the movable mold, both of which are rolling friction. In particular, the circumferential rotation and axial movement are formed by different components, which avoids the influence of the circumferential track formed by circumferential rotation on the smoothness and accuracy of axial movement during long-term use and wear, and also avoids the influence of the axial track formed by axial movement on the smoothness and accuracy of circumferential rotation.

[0016] Compared with the prior art, the multi-color multi-station mold has the following advantages:

[0017] 1. Since the main shaft is connected to the rotating core, i.e. the main shaft rotates by positioning the product through the rotating core, the rotating core on the main shaft is columnar, small in volume and light in weight, so the travel accuracy and position accuracy during rotation are higher. Since the main shaft is subjected to small load, the required driving force is also small, and the wear of the rotating component on the main shaft during long-term use is also small, so that the main shaft itself is more stable and has higher accuracy, thereby improving the forming quality of the product.

[0018] 2. Since the sliding sleeve is provided on the main shaft, circumferential rotation and axial movement are formed by different components, which avoids the influence of the circumferential track formed by circumferential rotation on the smoothness and accuracy of axial movement during long-term use and wear, and also avoids the influence of the axial track formed by axial movement on the smoothness and accuracy of circumferential rotation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the three-dimensional structure of the multi-color multi-station mold.

[0020] Figure 2 is a transverse structure sectional view of the multi-color multi-station mold.

[0021] Figure 3 is a schematic view of the structure when the mounting seat is located in the accommodation groove in the open mold state.

[0022] Figure 4 is a schematic view of the structure when the mounting seat extends out of the accommodation groove in the open mold state.

[0023] Figure 5 is Figure 2 is a structure sectional view of A-A in

[0024] Figure 6 is Figure 2 is an enlarged view of B in

[0025] Figure 7 is Figure 3 a structure enlarged view at C in the middle.

[0026] Figure 8 is Figure 5 a structure enlarged view at D in the middle.

[0027] Figure 9 is Figure 2 a structure enlarged view at E in the middle.

[0028] Figure 10 is Figure 5 a structure enlarged view at F in the middle.

[0029] In the figure, 1, fixed mold; 11, fixed mold block; 111, fixed mold cavity; 2, movable mold; 21, movable mold block; 211, movable mold cavity; 212, positioning column; 22, let go of the slot; 23, shaft hole; 24, guide column; 25, wear-resistant sleeve; 3, main shaft; 4, rotating core; 41, fixed end; 411, clamping groove; 42, core end; 421, positioning hole; 5, injection cavity; 51, notch; 52, through channel; 6, mounting seat; 61, mounting surface; 62, mounting hole; 63, fixing groove; 64, fixed block; 65, bolt; 66, guide hole; 7, top plate; 71, avoiding hole; 72, positioning convex edge; 8, sliding sleeve; 81, ball; 9, positioning rod; 91, sliding block; 911, clamping notch; 92, drive oil cylinder; 921, connecting head. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present application and further describe the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0031] As Figure 1 , Figure 2 shown, a multi-color multi-station mold includes a fixed mold 1 and a movable mold 2, the movable mold 2 can be horizontally moved relative to the fixed mold 1 through the drive of an injection molding machine to realize mold opening and mold closing, a shaft hole 23 is horizontally provided at the center position of the movable mold 2, a main shaft 3 is provided in the shaft hole 23, the inner end of the main shaft 3 passes through the shaft hole 23 and faces the fixed mold 1, the main shaft 3 can be synchronously moved with the movable mold 2 to realize mold opening and mold closing under the drive of the injection molding machine, and can be axially moved and circumferentially rotated relative to the movable mold 2 when the movable mold 2 is in the mold opening state. In combination with Figure 3 , Figure 4 , Figure 5As shown, the side of the fixed mold 1 facing the movable mold 2 is fixedly embedded with three fixed mold inserts 11, each of which is provided with a fixed mold cavity 111 opening towards the movable mold 2, and the side of the movable mold 2 facing the fixed mold 1 is fixedly embedded with three movable mold inserts 21, each of which is provided with a movable mold cavity 211 opening towards the fixed mold 1, the three movable mold cavities 211 correspond to the three fixed mold cavities 111 one by one, and the fixed mold cavities 111 and the movable mold cavities 211 are each provided with a notch 51 penetrating in the direction of the main shaft 3. The outer side of the movable mold insert 21 is vertically fixed with two positioning columns 212, which are respectively located on both sides of the movable mold cavity 211, and the outer side of the fixed mold insert 11 is provided with two matching holes, which are respectively located on both sides of the fixed mold cavity 111, and when the movable mold 2 and the movable mold 2 are in the mold closing state, the two positioning columns 212 are respectively inserted into the two matching holes. The end of the main shaft 3 facing the fixed mold 1 is fixedly provided with a mounting seat 6, and the mounting seat 6 is fixedly provided with three rotating cores 4 which are circumferentially and uniformly distributed around the main shaft 3, the rotating core 4 is columnar and is arranged radially along the main shaft 3, when the movable mold 2 and the fixed mold 1 are in the mold closing state, the rotating core 4 is located between the fixed mold cavity 111 and the movable mold cavity 211, and the two notches 51 act on the outer side of the rotating core 4 to form a closed injection cavity 5 between the fixed mold cavity 111, the movable mold cavity 211 and the rotating core 4, that is, three injection cavities 5 are formed when the mold is closed, and there is a gap between the outer side of the rotating core 4 and the inner wall of the fixed mold cavity 111 and the movable mold cavity 211.

[0032] Specifically, in combination with Figure 6 As shown, the radial cross section of the mounting seat 6 along the main shaft 3 is an equilateral triangle, and the mounting seat 6 has three circumferentially distributed mounting surfaces 61, and the three mounting surfaces 61 are parallel to the axis of the main shaft 3. The mounting surface 61 is provided with a mounting hole 62, and two fixing grooves 63 are also provided on the mounting surface 61, the two fixing grooves 63 are respectively located on both sides of the mounting hole 62, and the two fixing grooves 63 are both penetrated to the hole wall of the mounting hole 62. The rotating core 4 includes a fixed end 41 and a core end 42, the outer side of the fixed end 41 is provided with two clamping grooves 411, the fixed end is inserted into the mounting hole 62, and the two clamping grooves 411 are respectively opposite to the two fixing grooves 63, the fixing groove 63 is fixedly provided with a fixed block 64 through a bolt 65, the fixed block 64 is inserted into the clamping groove 411 and tightly fixes the end of the rotating core 4 in the mounting hole 62, and the end of the fixed block 64 away from the rotating core 4 has a spacing with the groove wall of the fixing groove 63 for the fixed block 64 to exit the clamping groove 411 when disassembled, and the core end 42 of the rotating core 4 can be inserted into the injection cavity 5. In combination with Figure 7 、 Figure 8As shown, the mounting surface 61 is also connected with a top plate 7, the top plate 7 is provided with a avoiding hole 71, one side surface of the top plate 7 can be attached to the mounting surface 61, the other side surface of the top plate 7 is provided with an annular positioning convex edge 72, the positioning convex edge 72 is arranged around the avoiding hole 71, and the inner circumferential surface of the positioning convex edge 72 is coplanar with the hole wall of the avoiding hole 71, the rotating core 4 passes through the avoiding hole 71, and the hole wall of the avoiding hole 71 and the inner circumferential surface of the positioning convex edge 72 can be attached to the outer circumferential surface of the fixed end 41 of the rotating core 4. The outer circumferential surface of the positioning convex edge 72 is a tapered surface with a small end outward, the notch 51 is circular, and the inner diameter of the notch 51 gradually increases from inside to outside, and when the rotating core 4 extends into the injection cavity 5, the inner circumferential surface of the two notches 51 is attached to the outer circumferential surface of the positioning convex edge 72.

[0033] In combination Figure 9 As shown, the side surface of the movable mold 2 facing the fixed mold 1 is provided with a letting-in groove 22 with an equilateral triangular cross section, a shaft hole 23 penetrates the center position of the letting-in groove 22, and a wear-resistant sleeve 25 is fixed in the shaft hole 23. The main shaft 3 is sleeved with a sliding sleeve 8, the sliding sleeve 8 is uniformly embedded with a plurality of rolling balls 81, the rolling balls 81 protrude from the inner and outer circumferential surfaces of the sliding sleeve 8, and the rolling balls 81 abut against the outer circumferential surface of the main shaft 3 and the inner circumferential surface of the wear-resistant sleeve 25, respectively. The sliding sleeve 8 is axially positioned with the main shaft 3, and the main shaft 3 can rotate circumferentially relative to the sliding sleeve 8. The sliding sleeve 8 is circumferentially positioned with the movable mold 2, and the sliding sleeve 8 can axially slide in the shaft hole 23. The main shaft 3 extends into the letting-in groove 22 and is fixedly connected with the mounting seat 6, the mounting seat 6 can be embedded into the letting-in groove 22, and when the rotating core 4 is located in the movable mold cavity 211, the inner end surface of the mounting seat 6 abuts against the bottom surface of the letting-in groove 22. Three guide holes 66 are formed in the inner end surface of the mounting seat 6, and the three guide holes 66 are respectively located at the three acute angles of the inner end surface of the mounting seat 6. Three guide columns 24 are vertically fixed on the bottom surface of the letting-in groove 22, and when the mounting seat 6 is embedded into the letting-in groove 22, the three guide columns 24 are respectively slidably inserted into the three guide holes 66.

[0034] In combination Figure 10As shown, the injection cavity 5 far away from one end of the main shaft 3 has a through channel 52 which is coaxial with the notch 51, and the sliding block 91 is axially slidably connected along the through channel 52 on the movable die 2, one of the injection cavities 5 is located between the main shaft 3 and the sliding block 91, and the positioning rod 9 is fixed on the sliding block 91, the positioning rod 9 is coaxially arranged with the rotating core 4 in the injection cavity 5, the outer diameter of the positioning rod 9 gradually decreases from the outer end to the inner end, and the positioning rod 9 has a cylindrical positioning portion at the inner end, and the inner end face of the rotating core 4 is provided with a positioning hole 421. The driving oil cylinder 92 is also fixed on the movable die 2, the piston rod end of the driving oil cylinder 92 is fixedly connected with the connecting head 921, the clamping notch 911 is formed on the sliding block 91, the connecting head 921 is clamped in the clamping notch 911 of the sliding block 91, and the driving oil cylinder 92 can drive the sliding block 91 to reciprocally slide along the axial direction of the through channel 52, thereby driving the positioning rod 9 to extend and retract. When the movable die 2 and the fixed die 1 are in the mold closing state to form the injection cavity 5, the rotating core 4 extends into the injection cavity 5 from the notch 51, the positioning rod 9 extends into the injection cavity 5 from the through channel 52, and the positioning portion on the positioning rod 9 is inserted into the positioning hole 421 on the rotating core 4 to form the plug-in positioning, and the outer peripheral surface of the positioning portion is in close contact with the hole wall of the positioning hole 421.

[0035] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art to which the present application pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0036] Although the terms such as the fixed die 1, the fixed die insert 11, and the fixed die cavity 111 are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present application; any kind of additional limitation by interpreting them is contrary to the spirit of the present application.

Claims

1. A multi-color multi-station mold, comprising a fixed mold (1), a movable mold (2) and a main shaft (3) passing through the movable mold (2) and capable of moving synchronously with the movable mold (2), the fixed mold (1) having a plurality of fixed mold cavities (111) distributed around the main shaft (3) on the side of the fixed mold (1), the movable mold (2) having a plurality of movable mold cavities (211) distributed around the main shaft (3) on the side of the movable mold (2), characterized in that, The main shaft (3) is fixed with several rotating cores (4) which are uniformly distributed in the circumference and are located at one end of the main shaft (3) towards the fixed mold (1), the rotating core (4) is columnar and is arranged radially along the main shaft (3), the fixed mold cavity (111) and the movable mold cavity (211) are both provided with a notch (51) which penetrates towards the main shaft (3), when the movable mold (2) and the fixed mold (1) are in the mold closing state, the rotating core (4) is located between the fixed mold cavity (111) and the movable mold cavity (211), and the two notches (51) are engaged with the outside of the rotating core (4) to form a closed injection cavity (5) among the fixed mold cavity (111), the movable mold cavity (211) and the rotating core (4), when the movable mold (2) is in the mold opening state, the main shaft (3) can axially slide and circumferentially rotate relative to the movable mold (2); the main shaft (3) is fixed with a mounting seat (6) at one end towards the fixed mold (1), the outside of the mounting seat (6) is provided with several mounting surfaces (61) which are distributed in the circumference and are parallel to the axis of the main shaft (3), one end of the several rotating cores (4) is respectively fixed perpendicularly on the several mounting surfaces (61), and the other end can respectively penetrate into the several injection cavities (5), the mounting surface (61) is further connected with a top plate (7), the top plate (7) is provided with an avoiding hole (71), one side surface of the top plate (7) can be attached to the mounting surface (61), the rotating core (4) penetrates through the avoiding hole (71), and the hole wall of the avoiding hole (71) can be attached to the outer circumferential surface of one end of the rotating core (4) which is close to the mounting surface (61), the other side surface of the top plate (7) is provided with an annular positioning convex edge (72), the positioning convex edge (72) is arranged around the avoiding hole (71), and the inner circumferential surface of the positioning convex edge (72) is coplanar with the hole wall of the avoiding hole (71), the outer circumferential surface of the positioning convex edge (72) is a conical surface with a small end outward, the notch (51) is circular, and the inner diameter of the notch (51) gradually increases from inside to outside, when the rotating core (4) extends into the injection cavity (5), the inner circumferential surface of the two notches (51) is attached to the outer circumferential surface of the positioning convex edge (72).

2. The multi-color multi-station mold of claim 1, wherein, The fixed mold (1) comprises several fixed mold inserts (11) which are distributed around the main shaft (3), the fixed mold cavity (111) is arranged on the fixed mold insert (11), the movable mold (2) comprises several movable mold inserts (21) which are distributed around the main shaft (3), the movable mold cavity (211) is arranged on the movable mold insert (21), when the movable mold (2) and the fixed mold (1) are in the mold closing state, the outer surface of the rotating core (4) has a gap between the inner wall of the fixed mold cavity (111) and the movable mold cavity (211).

3. The multi-color multi-station mold of claim 2, wherein, The outer surface of the movable mold insert (21) is vertically fixed with two positioning columns (212), the two positioning columns (212) are respectively located on both sides of the movable mold cavity (211), the outer surface of the fixed mold insert (11) is provided with two matching holes which are respectively located on both sides of the fixed mold cavity (111), when the movable mold (2) and the movable mold (2) are in the mold closing state, the two positioning columns (212) are respectively inserted into the two matching holes.

4. The multi-color multi-station mold of claim 1, wherein, The mounting surface (61) is provided with a mounting hole (62), and two fixing grooves (63) are also provided on the mounting surface (61), the two fixing grooves (63) are respectively located on the two sides of the mounting hole (62), and the two fixing grooves (63) both penetrate the hole wall of the mounting hole (62), two clamping grooves (411) are provided on the outer side of the end of the rotating core (4) facing the mounting seat (6), the end of the rotating core (4) is inserted into the mounting hole (62), and the two clamping grooves (411) are respectively opposite to the two fixing grooves (63), the fixing block (64) is fixed in the fixing groove (63) through a bolt (65), and the fixing block (64) is inserted into the clamping groove (411) and tightly fixes the end of the rotating core (4) in the mounting hole (62).

5. The multi-color multi-station mold of claim 1, wherein, The mounting seat (6) is in the shape of an equilateral triangle in the radial section of the main shaft (3), and the mounting seat (6) has three mounting surfaces (61), the side of the movable mold (2) facing the fixed mold (1) is provided with a yielding groove (22) in the shape of an equilateral triangle in section, a shaft hole (23) is provided in the center of the yielding groove (22), the main shaft (3) penetrates the shaft hole (23), and the mounting seat (6) can be embedded into the yielding groove (22), and when the rotating core (4) is located in the movable mold cavity (211), the inner end surface of the mounting seat (6) abuts against the bottom surface of the yielding groove (22).

6. The multi-color multi-station mold of claim 5, wherein, Three guide holes (66) are provided on the inner end surface of the mounting seat (6), the three guide holes (66) are respectively located at the three sharp corners of the inner end surface of the mounting seat (6), and three guide columns (24) are vertically fixed on the bottom surface of the yielding groove (22), when the mounting seat (6) is embedded into the yielding groove (22), the three guide columns (24) are respectively slidably inserted into the three guide holes (66).

7. The multi-color multi-station mold of claim 5, wherein, A wear-resistant sleeve (25) is fixed in the shaft hole (23), a sliding sleeve (8) is sleeved on the main shaft (3), a plurality of rolling balls (81) are embedded on the sliding sleeve (8), the rolling balls (81) protrude from the inner and outer circumferential surfaces of the sliding sleeve (8), and the rolling balls (81) abut against the outer circumferential surface of the main shaft (3) and the inner circumferential surface of the wear-resistant sleeve (25), the sliding sleeve (8) is axially positioned with the main shaft (3), and the main shaft (3) can rotate circumferentially relative to the sliding sleeve (8), and the sliding sleeve (8) is circumferentially positioned with the movable mold (2), and the sliding sleeve (8) can axially slide in the shaft hole (23).

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