An injection molding apparatus for producing a mark-free thin-walled injection molded part

Abstract

The application relates to an injection molding equipment for producing a traceless thin-wall injection molding part, belonging to the field of injection molding machines, which comprises an injection system connected with a heating system for hot-melt plastic, characterized in that a mold clamping box is arranged, the injection system is connected with the mold clamping box, one movable mold and two static molds are arranged in the mold clamping box, the injection system injects hot-melt plastic into the static molds, a shunt assembly for guiding hot-melt plastic to flow to only one static mold at a time is arranged in the mold clamping box, and a mold clamping assembly for driving the movable mold to be separated from one static mold and then immediately transported to another static mold for mold clamping is arranged in the box. The application has the effect of avoiding the idle of the movable mold during the material taking process of the mechanical hand, thereby improving the production efficiency of the injection molding product.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of injection molding machines, in particular to an injection molding equipment for producing traceless thin-wall injection molded parts. BACKGROUND

[0002] The injection molding machine is also called an injection molding machine or an injection machine. It is the main molding equipment for making various shaped plastic products by using a plastic molding mold. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat plastic and apply high pressure to molten plastic to make it fill the mold cavity.

[0003] The general mold cavity includes a movable mold and a static mold. After the movable mold and the static mold are combined, the injection system injects molten thermoplastic into the static mold. After the thermoplastic cools and forms, the product is completed. After the movable mold and the static mold are separated, the product in the static mold is taken out by the mechanical hand.

[0004] In the related art, the movable mold is idle during the transfer and grabbing process of the mechanical hand, which reduces the overall production efficiency. SUMMARY

[0005] In order to avoid the idle of the movable mold during the material taking process of the mechanical hand and improve the production efficiency of the injection molded product, the application provides an injection molding equipment for producing traceless thin-wall injection molded parts.

[0006] The injection molding equipment for producing traceless thin-wall injection molded parts provided by the application adopts the following technical scheme:

[0007] An injection molding equipment for producing traceless thin-wall injection molded parts, comprising an injection system connected with a heating system for hot-melt plastic, and a mold closing box, wherein the injection system is connected with the mold closing box, the mold closing box is provided with one movable mold and two static molds, the injection system injects hot-melt plastic into the static mold, the mold closing box is provided with a flow dividing component for guiding hot-melt plastic to flow to only one static mold at a time, and the box is provided with a mold closing component for driving the movable mold to separate from one static mold and immediately transfer to another static mold for mold closing.

[0008] By adopting the technical scheme, the heating system melts the hot plastic, the melted hot plastic is transmitted to the injection system, the injection system injects the melted hot plastic into the mold clamping box, the shunt assembly in the mold clamping box makes the melted hot plastic flow into one of the static molds, the mold clamping assembly controls the dynamic mold to be combined with the static mold that is ready to inject the hot melted hot plastic, thereby realizing the production of the injection molded part, when the static mold is injection molded and cooled to be shaped, the mold clamping assembly controls the dynamic mold to be separated from the static mold and combined with another static mold, then the shunt assembly guides the hot plastic to be injected into another static mold, when the other static mold is injection molded, the mechanical hand takes out the product from the static mold, when the other static mold is injection molded, the above operation is repeated, the dynamic mold is not idle during the taking of the product by the mechanical hand, thereby improving the production efficiency of the injection molded product.

[0009] Optionally, the shunt assembly comprises a shunt injection pipeline, the shunt injection pipeline has two discharge ports and one feeding port, the two discharge ports are respectively communicated with the two static molds, the feeding port is connected with the injection system, a first motor is arranged in the mold clamping box, a driving shaft of the first motor is connected with a rotating disc, a guide groove is formed in the rotating disc, a moving rod is slidably connected in the mold clamping box, one end of the moving rod is rotatably connected with a roller, one end of the roller is slidably arranged in the guide groove, the end of the moving rod away from the rotating disc extends into the shunt injection pipeline, and a blocking block is arranged at the end of the moving rod extending into the shunt injection pipeline, the guide groove guides the moving rod to make reciprocating motion when the rotating disc rotates, so that the blocking block blocks one injection port of the shunt injection pipeline each time.

[0010] By adopting the above technical scheme, the injection system injects the hot plastic into the shunt injection pipeline, the first motor drives the rotating disc to rotate, the guide groove of the rotating disc guides the moving rod to move and drives the blocking block to move to block one discharge port of the shunt injection pipeline when the rotating disc rotates, when the first static mold is injection molded, the rotating disc continues to rotate to make the moving rod drive the blocking block to separate from the discharge port and block the discharge port that has been injection molded.

[0011] Optionally, the end of the blocking block towards the feeding port is provided with a flow guide surface, the shunt injection pipeline is a Y-shaped pipeline, and the shunt injection pipeline is provided with an embedding groove abutting against the flow guide surface.

[0012] By adopting the above technical scheme, the flow guide surface guides the hot plastic to be smoothly injected into the static mold, and the embedding groove is cut with the flow guide surface to reduce the residual flow of the hot plastic in the shunt injection pipeline.

[0013] Optionally, the two static molds are horizontally placed and the combined surface of the two static molds is upwardly arranged, and the shunt injection pipeline is vertically arranged and connected at the bottom of the two static molds.

[0014] By adopting the above technical scheme, the thermoplastic plastic is slowly injected into the static mold from bottom to top, and when the thermoplastic plastic is injected, the thermoplastic plastic extrudes and discharges the air in the injection pipe and the air in the static mold, thereby reducing the situation that bubbles appear on the injection surface after production is completed, and realizing traceless production of the surface of the thin-walled injection product.

[0015] Optionally, the mold closing assembly comprises a horizontal moving plate, the horizontal moving plate is slidingly arranged in the mold closing box, a first vertical groove is formed in the horizontal moving plate, a second motor is arranged in the mold closing box, a first rotating disc is connected to the driving shaft of the second motor, a first guide groove is formed in the first rotating disc, a swing rod is rotatably connected to the mold closing box, one end of the swing rod is slidingly connected to the first guide groove, and the other end of the swing rod is slidingly connected to the first vertical groove, and the first rotating disc drives the swing rod to push the horizontal moving plate to move horizontally reciprocatingly.

[0016] The movable mold is connected with a push rod, and the horizontal moving plate is provided with a connecting piece for driving the push rod to move up and down reciprocatingly.

[0017] By adopting the above technical scheme, the second motor drives the first rotating disc to rotate, the first guide groove guides the swing rod to swing when the first rotating disc rotates, one end of the swing rod moves up and down along the first vertical groove of the horizontal moving plate while the swing rod pushes the horizontal moving plate to move horizontally reciprocatingly, and the horizontal moving plate drives the push rod to move when the horizontal moving plate moves, so that the push rod can drive the movable mold to move and align with the static mold, and when the push rod moves and aligns with the static mold, the connecting piece drives the movable mold to close with the static mold, the connecting piece drives the movable mold to separate from the static mold after injection is completed, and the horizontal moving plate drives the movable mold to move and align with another static mold, and then the connecting piece drives the movable mold to close with the static mold again.

[0018] Optionally, the connecting piece comprises a second rotating disc, the second rotating disc is arranged on the driving shaft of the second motor, a second guide groove is formed in the second rotating disc, a guide rod is rotatably connected to the mold closing box, a shaft is arranged at one end of the guide rod, a second vertical groove is formed in the horizontal moving plate, a guide plate is slidingly arranged in the second vertical groove, a horizontal groove is formed in the guide plate, one end of the shaft is located in the second guide groove, and the other end of the shaft is located in the horizontal groove, the push rod is connected to the guide plate, and the second rotating disc drives the guide rod to swing and drives the guide rod to drive the guide plate to move up and down reciprocatingly.

[0019] By adopting the technical scheme, the second motor drives the first rotating disc and the second rotating disc to rotate simultaneously, when the first guide groove of the first rotating disc guides the swing rod to push the transverse plate to move transversely and align with one of the static molds, at this time, the second guide groove of the second rotating disc guides the guide rod to rotate, the guide rod moves along the transverse groove of the guide plate and pushes the guide plate to move downward, so that the guide plate drives the push rod to move downward and drives the movable mold to combine with one of the static molds;

[0020] When the injection molding is completed, the first guide disc and the second guide disc continue to rotate, the second guide groove guides the guide rod to drive the guide plate to move upward along the second vertical groove, so that the push rod drives the movable mold to separate from the static mold, then the first guide groove guides the swing rod to push the transverse plate to move at this time, so that the movable mold aligns with another static mold, through repeatedly repeating the above operation, the movable mold realizes the cycle actions of moving forward transversely to align with the static mold, moving downward to combine, moving upward to separate, moving backward transversely to align with another static mold, moving downward to combine, and moving upward to separate.

[0021] Optionally, the guide plate is provided with two connecting blocks, the second vertical groove is provided with two, the push rod is connected with two connecting rods, the connecting rods correspond to the connecting blocks one by one, the connecting blocks correspond to the second vertical grooves one by one, and one end of the connecting rod passes through the corresponding connecting plate and is slidably arranged in the second vertical groove.

[0022] Optionally, the first guide groove comprises a V-shaped groove and an arc-shaped groove, the V-shaped groove and the arc-shaped groove are communicated in series to form a closed ring groove, and the second guide groove is a rhombic groove.

[0023] By adopting the technical scheme, when the swing rod is at the bottom of the V-shaped groove, the guide rod is located at the acute angle end of the rhombic groove, at this time, the movable mold is just combined with one of the static molds, when the first rotating disc rotates, the swing rod moves along the inclined edge of the V-shaped groove, so that the swing rod drives the transverse plate to move transversely, and when the transverse plate drives the movable mold to align with one of the static molds, the swing rod is located in the arc-shaped groove, at this time, the transverse plate stops moving, when the swing rod passes through the inclined edge of the V-shaped groove again, the transverse plate moves reversely transversely.

[0024] Meanwhile, with the movement of the second rotating disc, the guide rod moves along the inclined edge of the rhombic groove, so that the guide rod drives the guide plate to move upward first and then gradually downward, when the guide rod is located at the other acute angle end of the rhombic groove, the movable mold is just combined with another static mold.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The split component in the mold box directs the molten thermoplastic to one of the static molds, the mold closing component controls the dynamic mold to close with the static mold that is ready to inject the molten thermoplastic, so as to realize the production of the injection molded part, when the static mold is injection molded and cooled, the mold closing component controls the dynamic mold to separate from the static mold and close with another static mold, then the split component guides the thermoplastic to be injected into another static mold, when another static mold is injection molded, the robot takes out the product from the static mold, when another static mold is injection molded, the above operation is repeated, so as to avoid the dynamic mold to be idle during the robot taking out the product, so as to improve the production efficiency of the injection molded product.

[0027] 2. The thermoplastic is slowly injected into the static mold from bottom to top, when the thermoplastic is injection molded, the thermoplastic extrudes and discharges the air in the split injection tube and the air in the static mold, so as to reduce the production of bubbles on the injection molded surface and realize the traceless production of the surface of the thin-walled injection molded product. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure schematic diagram of the embodiment of the application.

[0029] Figure 2 is the structure schematic diagram of the split component of the embodiment of the application.

[0030] Figure 3 is the structure schematic diagram of the mold closing component of the embodiment of the application.

[0031] Figure 4 is the structure schematic diagram of the transverse moving plate of the embodiment of the application.

[0032] Figure 5 is the structure schematic diagram of the guide rod and the roller of the embodiment of the application.

[0033] Figure 6 is the structure schematic diagram of the swing rod of the embodiment of the application.

[0034] Figure 7 is the structure schematic diagram of the second guide groove of the embodiment of the application.

[0035] Figure 8 is the structure schematic diagram of the first guide groove of the embodiment of the application.

[0036] Explanation of reference signs: 1, injection system; 2, heating system; 3, clamping box; 4, shunt assembly; 41, shunt injection pipeline; 411, feeding port; 412, discharging port; 413, embedding groove; 42, first motor; 43, rotating disc; 431, guide groove; 44, moving rod; 45, roller; 46, blocking block; 461, flow guide surface; 5, static mold; 6, dynamic mold; 7, clamping assembly; 71, transverse moving plate; 711, first vertical groove; 712, second vertical groove; 72, second motor; 73, first rotating disc; 74, first guide groove; 741, V-shaped groove; 742, arc-shaped groove; 75, swing rod; 8, connecting piece; 81, guide plate; 811, horizontal groove; 812, connecting block; 813, connecting rod; 82, push rod; 83, guide rod; 84, rotating shaft; 85, second rotating disc; 86, second guide groove; 861, rhombus-shaped groove. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying drawings. Figures 1-8 The application is further described in detail.

[0038] The embodiment of the application discloses an injection molding equipment for producing a traceless thin-wall injection molding part.

[0039] As Figure 1 And Figure 2 The injection molding equipment for producing a traceless thin-wall injection molding part comprises an injection system 1, the injection system 1 is connected with a heating system 2 for hot melt plastic, the injection system 1 is connected with a clamping box 3, the clamping box 3 is provided with a shunt assembly 4, the shunt assembly 4 comprises a shunt injection pipeline 41, the shunt injection pipeline 41 is a Y-shaped pipeline, the shunt injection pipeline 41 has two discharging ports 412 and one feeding port 411, the shunt injection pipeline 41 is vertically placed, the feeding port 411 of the shunt injection pipeline 41 is connected with the injection system 1, the shunt injection pipeline 41 is connected with two static molds 5, the two static molds 5 are respectively communicated with the two discharging ports 412, the static mold 5 is horizontally placed and one side of the static mold 5 is upwardly provided, and the bottom of the static mold 5 is connected with the shunt injection pipeline 41.

[0040] As Figure 2 And Figure 3The inner wall of the mold clamping box 3 is provided with a first motor 42, the first motor 42 is connected with a rotating disc 43, a guide groove 431 is formed in the side of the rotating disc 43 away from the first motor 42, and the guide groove 431 is an eccentric ring-shaped groove. A moving rod 44 is slidably arranged in the shunt injection pipeline 41, one end of the moving rod 44 away from the shunt injection pipeline 41 is provided with a roller shaft 45, one end of the roller shaft 45 is located in the guide groove 431, and the roller shaft 45 is matched with the guide groove 431 and can slide along the guide groove 431. One end of the moving rod 44 extending into the shunt injection pipeline 41 is provided with a blocking block 46, one end face of the blocking block 46 towards the feeding port 411 is cut into two flow guide faces 461, the two flow guide faces 461 are both arranged to be inclined, the inclined directions of the two flow guide faces 461 are opposite, both inner side walls of the shunt injection pipeline 41 are provided with an embedding groove 413, and the embedding groove 413 is attached to the flow guide face 461 opposite thereto. The guide groove 431 guides the moving rod 44 to make transverse reciprocating motion when the rotating disc 43 rotates, so that the blocking block 46 closes one discharge port 412 of the shunt injection pipeline 41 each time.

[0041] As Figure 3 The mold clamping box 3 is provided with a movable mold 6, the movable mold 6 is located above the stationary mold 5, and the mold clamping box 3 is provided with a mold clamping assembly 7 for separating the movable mold 6 from one stationary mold 5 and immediately transferring the movable mold 6 to another stationary mold 5 for clamping.

[0042] As Figure 3 And Figure 4 The mold clamping assembly 7 comprises a transverse moving plate 71, the transverse moving plate 71 is slidably arranged in the mold clamping box 3, the transverse moving plate 71 can move horizontally in the box, one side of the transverse moving plate 71 is provided with a first vertical groove 711, and the first vertical groove 711 is located on the side of the transverse moving plate 71 close to the movable mold 6. The other side of the transverse moving plate 71 is provided with two second vertical grooves 712.

[0043] As Figure 3 And Figure 4 The transverse moving plate 71 is provided with a connecting piece 8 for driving the movable mold 6 to move up and down reciprocally, the connecting piece 8 comprises a guide plate 81, the guide plate 81 is provided with a horizontal groove 811, the bottom of the guide plate 81 is provided with two connecting blocks 812, the connecting blocks 812 correspond to the second vertical grooves 712 one by one, the connecting blocks 812 are provided with a connecting rod 813, one end of the connecting rod 813 is located in the second vertical groove 712 and can slide along the second vertical groove 712, and the two connecting plates are jointly connected with a push rod 82 at the ends away from the second vertical grooves 712, and the push rod 82 is connected with the movable mold 6.

[0044] As Figure 3 And Figure 5 The mold clamping box 3 is rotatably connected with a guide rod 83, one end of the guide rod 83 is provided with a rotating shaft 84, and one end of the rotating shaft 84 is located in the horizontal groove 811 and can move along the horizontal groove 811.

[0045] As Figure 6 , Figure 7 and Figure 8 , the second motor 72 is arranged on the mold clamping box 3, the driving shaft of the second motor 72 is connected with the first rotating disc 73 and the second rotating disc 85, the transverse plate 71, the guide plate 81, the guide rod 83 and the push rod 82 are located between the first rotating disc 73 and the second rotating disc 85. The side of the first rotating disc 73 facing the second rotating disc 85 is provided with a first guide groove 74, the first guide groove 74 includes a V-shaped groove 741 and an arc-shaped groove 742, the V-shaped groove 741 and the arc-shaped groove 742 are connected in series to form a closed ring groove, and the side of the second rotating disc 85 facing the first rotating disc 73 is provided with a second guide groove 86, the second guide groove 86 is a rhombic groove 861.

[0046] The swing rod 75 is rotatably connected in the mold clamping box 3, the swing rod 75 is an L-shaped rod, one end of the swing rod 75 is slidably connected with the first guide groove 74, and the other end of the swing rod 75 is slidably connected with the first vertical groove 711. The end of the rotating shaft 84 on the guide rod 83 away from the horizontal groove 811 is located in the second guide groove 86 and can slide along the second guide groove 86.

[0047] The heating system 2 melts the thermoplastic, the melted thermoplastic is transmitted to the injection system 1, the injection system 1 injects the thermoplastic into the split injection pipe 41, the first motor 42 drives the rotating disc 43 to rotate, the guide groove 431 of the rotating disc 43 guides the moving rod 44 to move to drive the blocking block 46 to block one of the discharge ports 412 of the split injection pipe 41.

[0048] During injection molding, the thermoplastic is slowly injected from bottom to top into the static mold 5, the thermoplastic extrudes and discharges the air in the split injection pipe 41 and the air in the static mold 5, thereby reducing the production of bubbles on the injection molding surface and realizing the traceless production of the surface of the thin-walled injection molded product.

[0049] When the first static mold 5 is injection molded, the rotating disc 43 continues to rotate to make the moving rod 44 drive the blocking block 46 to separate from the discharge port 412, and the discharge port 412 that has been injection molded is blocked.

[0050] When the mold is closed, the second motor 72 drives the first rotating disc 73 and the second rotating disc 85 to rotate, the first guide groove 74 guides the swing rod 75 to swing when the first rotating disc 73 rotates, one end of the swing rod 75 moves up and down along the first vertical groove 711 of the transverse plate 71 while the swing rod 75 pushes the transverse plate 71 to move horizontally, the transverse plate 71 drives the guide plate 81 and the push rod 82 to move when moving, so that the push rod 82 can drive the movable mold 6 to move and align with the static mold 5.

[0051] When the guide plate 81 and the push rod 82 move, the second guide groove 86 of the second rotating disc 85 guides the rotating of the guide rod 83, the guide rod 83 moves along the horizontal groove 811 of the guide plate 81 and pushes the guide plate 81 to move downward, so that the guide plate 81 drives the push rod 82 to move downward to make the movable mold 6 close with the aligned stationary mold 5. At this time, the swing rod 75 is at the bottom of the V-shaped groove 741, and the guide rod 83 is just at the acute angle end of the rhombic groove 861.

[0052] When the injection of the stationary mold 5 is completed, the first rotating disc 73 and the second rotating disc 85 continue to rotate, the second guide groove 86 first guides the guide rod 83 to drive the guide plate 81 to move upward along the second vertical groove 712, so that the push rod 82 drives the movable mold 6 to open with the stationary mold 5, then the first guide groove 74 guides the swing rod 75 to push the horizontal moving plate 71 to move at this time, so that the movable mold 6 aligns with another stationary mold 5, at this time, the first rotating disc 73 and the second rotating disc 85 continue to rotate, because the swing rod 75 is located in the arc-shaped groove 742 at this time, the horizontal moving plate 71 stops moving at this time, the guide rod 83 continues to move along the hypotenuse of the rhombic groove 861, so that the guide rod 83 drives the guide plate 81 to move downward to drive the movable mold 6 to close with another stationary mold 5.

[0053] Through repeated operation of the above operation, the movable mold 6 moves forward to align with the stationary mold 5, the movable mold 6 moves downward to close with a stationary mold 5, the movable mold 6 moves upward to open, the movable mold 6 moves backward to align with another stationary mold 5, and the movable mold 6 moves downward to close with another stationary mold 5, to realize the cycle action.

[0054] The position of the swing rod 75 in the first guide groove 74 and the position of the guide rod 83 in the second guide groove 86 are as follows:

[0055] When the swing rod 75 is at the bottom of the V-shaped groove 741, the guide rod 83 is just at the acute angle end of the rhombic groove 861, at this time, the movable mold 6 is just closed with a stationary mold 5, when the first rotating disc 73 rotates, the swing rod 75 moves along the hypotenuse of the V-shaped groove 741, so that the swing rod 75 drives the horizontal moving plate 71 to move horizontally, after the horizontal moving plate 71 drives the movable mold 6 to align with a stationary mold 5, the swing rod 75 is located in the arc-shaped groove 742, at this time, the horizontal moving plate 71 stops moving, when the swing rod 75 passes through the hypotenuse of the V-shaped groove 741 again, the horizontal moving plate 71 moves in the opposite direction.

[0056] At the same time, with the movement of the second rotating disc 85, the guide rod 83 moves along the hypotenuse of the rhombic groove 861, so that the guide rod 83 drives the guide plate 81 to move upward first and then gradually downward, when the guide rod 83 is located at the other acute angle end of the rhombic groove 861, the movable mold 6 is just closed with another stationary mold 5.

[0057] The principle of the embodiment of the present application is that the flow distribution assembly 4 in the mold box 3 makes the molten thermoplastic flow into one of the static molds 5, the mold assembly 7 controls the dynamic mold 6 to be combined with the static mold 5 for injecting the molten thermoplastic, thereby realizing the production of the injection molded part. When the static mold 5 is completed and cooled to form, the mold assembly 7 controls the dynamic mold 6 to be separated from the static mold 5 and combined with another static mold 5, and then the flow distribution assembly 4 guides the thermoplastic to be injected into another static mold 5. When the injection molding is performed in another static mold 5, the robot takes the product from the static mold 5. When the injection molding of another static mold 5 is completed, the above operation is repeated, so that the dynamic mold 6 is not idle during the material taking process of the robot, thereby improving the production efficiency of the injection molded product.

[0058] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An injection molding apparatus for producing a traceless thin-walled injection molded part, comprising an injection system (1) to which a heating system (2) for hot-melt plastic is connected, characterized in that: The injection system (1) is connected with a clamping box (3), the clamping box (3) is provided with a movable die (6) and two static dies (5), the injection system (1) injects hot melt plastic into the static die (5), the clamping box (3) is provided with a shunt assembly (4) for guiding hot melt plastic to flow to only one static die (5) each time, the box is provided with a clamping assembly (7) for driving the movable die (6) to separate from one static die (5) and immediately transfer to another static die (5) for clamping; the shunt assembly (4) comprises a shunt injection pipeline (41), the shunt injection pipeline (41) has two discharge ports (412) and one feeding port (411), the two discharge ports (412) are communicated with the two static dies (5) respectively, the feeding port (411) is connected with the injection system (1), the clamping box (3) is provided with a first motor (42), the driving shaft of the first motor (42) is connected with a rotating disc (43), the rotating disc (43) is provided with a guide groove (431), the clamping box (3) is slidably connected with a moving rod (44), one end of the moving rod (44) is rotatably connected with a roller (45), one end of the roller (45) is slidably arranged in the guide groove (431), the end of the moving rod (44) away from the rotating disc (43) extends into the shunt injection pipeline (41), the end of the moving rod (44) extending into the shunt injection pipeline (41) is provided with a blocking piece (46), the guide groove (431) guides the moving rod (44) to make reciprocating motion when the rotating disc (43) rotates, so that the blocking piece (46) closes one discharge port (412) of the shunt injection pipeline (41) each time.

2. Injection molding apparatus for the production of mark-free thin-walled injection molded parts according to claim 1, characterized in that The end of the blocking piece (46) towards the feeding port (411) is provided with a flow guide surface (461), the shunt injection pipeline (41) is a Y-shaped pipeline, the shunt injection pipeline (41) is provided with an embedding groove (413) abutting with the flow guide surface (461).

3. Injection molding apparatus for the production of mark-free thin-walled injection molded parts according to claim 2, characterized in that The two static dies (5) are horizontally placed, and the clamping surface of the two static dies (5) faces upward, the shunt injection pipeline (41) is vertically arranged and connected at the bottom of the two static dies (5).

4. The injection molding apparatus for producing a mark-free thin-walled injection molded part according to claim 1, characterized in that: The mold closing assembly (7) comprises a transverse plate (71) which is slidingly arranged in the mold closing box (3), a first vertical groove (711) is formed in the transverse plate (71), a second motor (72) is arranged in the mold closing box (3), a driving shaft of the second motor (72) is connected with a first rotary disc (73), a first guide groove (74) is formed in the first rotary disc (73), a swing rod (75) is rotatably connected in the mold closing box (3), one end of the swing rod (75) is slidingly connected with the first guide groove (74), the other end of the swing rod (75) is slidingly connected with the first vertical groove (711), the first rotary disc (73) is rotated to drive the swing rod (75) to push the transverse plate (71) to make reciprocating transverse movement; the movable mold (6) is connected with a push rod (82), and the transverse plate (71) is provided with a connecting piece (8) for driving the push rod (82) to move up and down reciprocatingly.

5. Injection molding apparatus for the production of mark-free thin-walled injection molded parts according to claim 4, characterized in that The connecting piece (8) comprises a second rotary disc (85), the second rotary disc (85) is arranged on the driving shaft of the second motor (72), a second guide groove (86) is formed in the second rotary disc (85), a guide rod (83) is rotatably connected in the mold closing box (3), one end of the guide rod (83) is provided with a rotating shaft (84), a second vertical groove (712) is formed in the transverse plate (71), a guide plate (81) is slidingly arranged in the second vertical groove (712), a horizontal groove (811) is formed in the guide plate (81), one end of the rotating shaft (84) is located in the second guide groove (86), the other end of the rotating shaft (84) is located in the horizontal groove (811), and the push rod (82) is connected with the guide plate (81).

6. Injection molding apparatus for the production of mark-free thin-walled injection molded parts according to claim 5, characterized in that The guide plate (81) is provided with two connecting blocks (812), the second vertical groove (712) is provided with two, the push rod (82) is connected with two connecting rods (813), the connecting rod (813) corresponds to the connecting block (812) one by one, the connecting block (812) corresponds to the second vertical groove (712) one by one, and one end of the connecting rod (813) penetrates through the corresponding connecting block (812) and is slidingly arranged in the second vertical groove (712).

7. The injection molding apparatus for producing a mark-free thin-walled injection molded part according to claim 5, characterized in that: The first guide groove (74) comprises a V-shaped groove (741) and an arc-shaped groove (742), the V-shaped groove (741) and the arc-shaped groove (742) are communicated in series to form a closed ring groove, and the second guide groove (86) is a rhombic groove (861).

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