Movable mold plate structure for multi-component injection molding machine

Abstract

The utility model relates to the field of injection molding machines, and discloses a movable mold plate structure for a multi-component injection molding machine, which comprises a movable mold plate (1), concave cavities (2) are arranged on two sides of the rear end face of the movable mold plate (1), connecting rod frames (3) are arranged at the upper ends and the lower ends of the concave cavities (2), a pulling plate (4) is arranged between the two connecting rod frames (3), and a notch (5) is arranged in the middle of the plate face of the pulling plate (4). According to the movable mold plate structure for the multi-component injection molding machine, the pulling plate (4) connected between the two connecting rod frames (3) can improve the overall rigidity of the movable mold plate (1), through the concave cavity (2) and the notch (5) in the middle of the pulling plate (4), the rigidity of the movable mold plate (1) can be guaranteed, the weight of the movable mold plate (1) can be reduced, and therefore the utilization rate of materials for manufacturing the movable mold plate (1) is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine field especially, a kind of movable template structure for multi-component injection molding machine. BACKGROUND

[0002] The injection molding machine that can realize the injection molding of multiple raw materials is called multi-component injection molding machine. In recent years, with the expansion of the demand for various injection molding products, the application of multi-component injection molding machine is becoming more and more widespread, the competitive pressure in the industry is increasing, and the functional configuration demand is also higher and higher. The two-plate mechanism of the clamping component is one of the core mechanisms of the multi-component injection molding machine, mainly including a movable template, a turntable arranged at the front end of the movable template, a driving mechanism for driving the turntable to rotate, and an ejection mechanism for ejecting the molded parts in the mold cavity. The utility model patent with the announcement number CN108890962A discloses a similar clamping device.

[0003] The above-mentioned clamping device has a relatively heavy movable template, low material utilization rate, and high production cost, so it needs to be improved. UTILITY MODEL CONTENT

[0004] The utility model provides a movable template structure for multi-component injection molding machine according to the shortcomings of prior art, which can ensure the rigidity of the movable template and reduce its weight through the recess cavity at the rear end of the movable template and the notch on the pull plate, thereby improving the material utilization rate and reducing the production cost.

[0005] To solve the above technical problems, the utility model solves them by the following technical schemes:

[0006] A movable template structure for multi-component injection molding machine includes a movable template, a recess cavity is arranged at the rear end face of the movable template and both sides thereof, a connecting rod frame is arranged at the upper and lower ends of the recess cavity, a pull plate is arranged between the two connecting rod frames, and a notch is arranged in the middle of the plate face of the pull plate.

[0007] The pull plate connected between the two connecting rod frames can improve the overall rigidity of the movable template, and the recess cavity and the notch in the middle of the pull plate can ensure the rigidity of the movable template and reduce its weight, thereby improving the material utilization rate of the movable template and reducing the production cost.

[0008] As a preferred embodiment, a groove is arranged at the front end of the movable template, and a turntable is rotatably arranged in the groove.

[0009] The above-mentioned scheme sets the turntable in the groove, which can reduce the occupied space of the turntable and further reduce the weight of the movable template, thereby further improving the material utilization rate of the movable template.

[0010] Preferably, the movable mold plate is provided with a driving mechanism for driving the rotating disc to rotate, the driving mechanism comprising a plurality of side teeth arranged around the outer periphery of the rotating disc, a gear arranged on one side of the movable mold plate and engaged with the side teeth, and a first power source arranged on one side of the movable mold plate and used for driving the gear to rotate.

[0011] According to the above scheme, the first power source can sequentially transmit power to the gear, the side teeth and the rotating disc, thereby driving the rotating disc to rotate and ensuring the stability and precision during rotation.

[0012] Preferably, the movable mold plate is provided with a limiting mechanism for locking the circumferential position of the rotating disc, the limiting mechanism comprising a locking disc arranged on the side of the rotating disc away from the pull plate, two locking grooves arranged on both sides of the edge of the locking disc, a locking block arranged on one side of the locking disc, and a second power source arranged on the movable mold plate and used for driving the locking block to enter or exit the locking groove.

[0013] According to the above scheme, the locking disc can rotate with the rotating disc, and the locking block can be driven by the second power source to enter the locking groove on the locking disc, thereby simultaneously completing the circumferential positioning of the locking disc and the rotating disc, improving the stability of the rotating disc during hovering, and thereby improving the injection precision of the injection molding machine.

[0014] Preferably, the pull plate is provided with a stripping mechanism on both sides of the notch for driving the injection molded workpiece to separate from the rotating disc, the stripping mechanism comprising a plurality of ejector pins sequentially penetrating the groove bottom and the rotating disc, and a driving assembly arranged on the pull plate and used for driving the ejector pins to extend and retract.

[0015] According to the above scheme, the driving assembly drives the ejector pins to extend and retract, thereby effectively completing the stripping action of the injection molded workpiece, and thereby improving the working efficiency of the injection molding machine.

[0016] Preferably, the driving assembly comprises an ejection guide plate arranged at the tail end of the ejector pin, and a third power source fixed to the pull plate and used for driving the ejection guide plate to translate forward and backward.

[0017] According to the above scheme, the third power source drives the ejection guide plate to translate forward and backward, thereby effectively realizing the extension and retraction of the ejector pin and completing the stripping operation of the stripping mechanism.

[0018] Preferably, a guide rod is arranged between the bottom of the cavity and the pull plate and slides through the ejection guide plate.

[0019] According to the above scheme, the guide rod can improve the stability of the ejection guide plate and the ejector pin during translation, and further increase the efficiency and precision of the stripping of the movable mold plate.

[0020] As preferred, the driving assembly comprises an ejection guide plate arranged at the tail end of the ejector pin, a screw rod rotatably arranged between the pull plate and the bottom of the cavity, a nut arranged at the ejection guide plate and threadedly matched with the screw rod, and a power unit connected with the screw rod to drive the screw rod to rotate circumferentially; when the screw rod rotates circumferentially, it can drive the nut to translate forward and backward.

[0021] By the above scheme, the rotation of the screw rod driven by the power unit can drive the nut on the screw rod and the ejection guide plate on the nut to translate forward and backward, so as to realize the extension and retraction of the ejector pin, and the operation precision and stability of the ejector pin can be greatly improved to adapt to higher precision demolding scenarios.

[0022] As preferred, the power unit comprises a driven wheel located at the side of the pull plate away from the cavity and connected with the screw rod, a driving wheel located at the side of the driven wheel, a transmission belt wound around the driving wheel and the driven wheel, and a fourth power source connected with the driving wheel to drive the driving wheel to rotate, and the plate surface of the pull plate away from the cavity is provided with a tensioning wheel for tensioning the transmission belt.

[0023] By the above scheme, the belt transmission mode has the advantages of high efficiency, stable transmission, large transmission ratio range, simple maintenance and low cost, and the tensioning wheel can improve the tightness between the transmission belt and the driving wheel and the driven wheel, thereby improving the transmission efficiency and precision.

[0024] As preferred, a guide rod slidingly arranged in the ejection guide plate is arranged between the bottom of the cavity and the pull plate.

[0025] By the above scheme, the guide rod can improve the stability of the ejection guide plate and the ejector pin during translation, further increasing the efficiency and precision of the moving die plate during demolding.

[0026] The utility model discloses a moving die plate and driving assembly thereof, which has the remarkable technical effects:

[0027] 1. The pull plate connected between the two connecting rod frames can improve the overall rigidity of the moving die plate, and the gap in the middle of the cavity and the pull plate can ensure the rigidity of the moving die plate while reducing its weight, thereby improving the material utilization rate of the moving die plate and reducing the production cost.

[0028] 2. The operator can install driving assemblies of different structures on the pull plate according to the precision requirements of demolding to adapt to different working conditions, thereby increasing the application range. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The structure diagram of the embodiment Figure 1 ;

[0030] Figure 2 The structure diagram of the embodiment Figure 2 ;

[0031] Figure 3 Structure diagram of the embodiment Figure 3 ;

[0032] Figure 4 Structure diagram of the embodiment Figure 1 Enlarged diagram of A part shown in

[0033] Figure 5 Structure diagram of the embodiment Figure 1 Enlarged diagram of B part shown in

[0034] Figure 6 Structure diagram of the embodiment Figure 4 ;

[0035] Figure 7 Structure diagram of the embodiment Figure 5 ;

[0036] Figure 8 Structure diagram of the embodiment Figure 6 ;

[0037] Figure 9 Structure diagram of the embodiment Figure 7 ;

[0038] Figure 10 Structure diagram of the embodiment Figure 8 .

[0039] The names of the parts referred to by the respective reference numerals in the above drawings are as follows: 1, movable die plate; 2, cavity; 3, connecting rod holder; 4, pull plate; 5, notch; 6, groove; 7, rotating disc; 8, side teeth; 9, gear; 10, first power source; 11, locking disc; 12, locking groove; 13, locking block; 14, second power source; 15, ejector pin; 16, driving assembly; 17, ejection guide plate; 18, third power source; 19, guide rod; 20, screw rod; 21, nut; 22, driven wheel; 23, driving wheel; 24, transmission belt; 25, fourth power source; 26, tension pulley; 27, avoiding groove; 28, first ejection hole; 29, second ejection hole. DETAILED DESCRIPTION

[0040] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0041] For example, Figure 1 and Figure 2As shown, the embodiment disclosed herein is a movable mold plate structure for a multi-component injection molding machine, which comprises a movable mold plate 1. The rear end surface of the movable mold plate 1 is provided with a concave cavity 2 on both sides. The upper and lower ends of the concave cavity 2 are provided with a connecting rod bracket 3. The two connecting rod brackets 3 are provided with a pull plate 4. The middle of the pull plate 4 is provided with a notch 5. In this way, the overall strength of the movable mold plate 1 can be improved, and the weight can be effectively reduced, thereby improving the material utilization rate of the movable mold plate 1 and reducing the production cost.

[0042] As shown, Figure 3 In order to further reduce the weight of the movable mold plate 1, a circular groove 6 is formed in the front end of the movable mold plate 1. A rotating disc 7 is rotatably arranged in the groove 6.

[0043] As shown, Figure 4 In order to realize the rotation of the rotating disc 7, a driving mechanism for driving the rotating disc 7 to rotate is arranged on the movable mold plate 1. Specifically, the driving mechanism comprises a plurality of edge teeth 8 arranged on the outer periphery of the rotating disc 7, a gear 9 arranged on one side of the movable mold plate 1 and engaged with the edge teeth 8, and a first power source 10 arranged on one side of the movable mold plate 1 and used for driving the gear 9 to rotate. The first power source 10 is preferably an electric motor, and the output shaft thereof is coaxially connected to the center of the end surface of the gear 9. The side edge of the movable mold plate 1 is provided with an avoiding groove 27 for the gear 9 and the edge teeth 8 to abut, so that the gear 9 can smoothly engage with the edge teeth 8.

[0044] As shown, Figure 5 In order to ensure the stability of the rotating disc 7 when hovering, a limiting mechanism for locking the circumferential position of the rotating disc 7 is arranged on the movable mold plate 1. The limiting mechanism comprises a locking disc 11 arranged on the side end surface of the rotating disc 7 away from the pull plate 4, two locking grooves 12 arranged on both sides of the edge of the locking disc 11, a locking block 13 arranged on one side of the locking disc 11, and a second power source 14 arranged on the movable mold plate 1 to drive the locking block 13 to enter or leave the locking groove 12. The second power source 14 is a pneumatic cylinder or an oil cylinder, and the output shaft thereof is fixed to the locking block 13 to realize the quick extension and contraction of the locking block 13. In the embodiment, when the locking disc 11 rotates with the rotating disc 7 to a position where one of the locking grooves 12 is directly opposite the locking block 13, the second power source 14 drives the locking block 13 to extend and insert into the corresponding locking groove 12, thereby completing the circumferential locking of the locking disc 11 and the rotating disc 7. When the rotating disc 7 needs to be replaced, the locking block 13 is retracted and separated from the locking groove 12 by the second power source 14, so that the circumferential locking of the locking disc 11 and the rotating disc 7 is released, and the first power source 10 can drive the rotating disc 7 to continue to rotate through the gear 9 and the edge teeth 8.

[0045] As shown, Figure 6 and Figure 7As shown, in order to realize the demolding operation of the movable mold plate 1, the pull plate 4 is provided with a stripping mechanism on both sides of the notch 5 for driving the injection molded workpiece to separate from the rotating disc 7, and the stripping mechanism comprises a plurality of ejector pins 15 sequentially penetrating through the bottom of the groove 6 and the rotating disc 7, and a driving assembly 16 provided on the pull plate 4 for driving the ejector pins 15 to extend and retract. The bottom of the groove 6 and the end face of the rotating disc 7 are respectively provided with a plurality of first ejection holes 28 and a plurality of second ejection holes 29 for the plurality of ejector pins 15 to slide through one by one, and the second ejection holes 29 penetrate through the locking disc 11, so that the ejector pins 15 can smoothly pass through the locking disc 11 into the mold, thereby realizing the demolding of the injection molded part.

[0046] In this embodiment, the driving assembly 16 can be realized in two ways to adapt to different use scenarios:

[0047] The first way, as shown in Figure 8 and Figure 9 , the driving assembly 16 comprises a stripping guide plate 17 provided at the tail end of the ejector pin 15 and located on the side of the pull plate 4 close to the cavity 2, and a third power source 18 fixed to the plate surface of the pull plate 4 away from the cavity 2 for driving the stripping guide plate 17 to translate forward and backward. The third power source 18 is an oil cylinder or an air cylinder, and its output shaft slides through the pull plate 4 and is fixed to the stripping guide plate 17, thereby realizing the forward and backward translation of the stripping guide plate 17.

[0048] As shown in Figure 9 , in order to improve the stability of the stripping guide plate 17 and the ejector pin 15 during translation, a guide rod 19 slidingly penetrating through the stripping guide plate 17 is arranged between the bottom of the cavity 2 and the pull plate 4.

[0049] The second way, as shown in Figure 8 and Figure 10 , the driving assembly 16 comprises a stripping guide plate 17 provided at the tail end of the ejector pin 15, a lead screw 20 rotatably arranged between the pull plate 4 and the bottom of the cavity 2, a nut 21 fixed to the stripping guide plate 17 and threadedly cooperating with the lead screw 20, and a power part connected to the lead screw 20 for driving the lead screw 20 to rotate circumferentially. When the lead screw 20 rotates circumferentially, it can drive the nut 21 to translate forward and backward. Specifically, the power part comprises a driven wheel 22 located on the side of the pull plate 4 away from the cavity 2 and connected to the lead screw 20, a driving wheel 23 located on the side of the driven wheel 22, a transmission belt 24 wound around the driving wheel 23 and the driven wheel 22, and a fourth power source 25 connected to the driving wheel 23 for driving the driving wheel 23 to rotate. The fourth power source 25 is preferably an electric motor fixed to the pull plate 4, and its output shaft is coaxially fixed to the driving wheel 23, so as to transmit power to the lead screw 20 through the driving wheel 23, the transmission belt 24 and the driven wheel 22, thereby realizing the circumferential rotation of the lead screw 20. The plate surface of the pull plate 4 away from the cavity 2 is provided with a tensioning wheel 26 for tensioning the transmission belt 24, so as to improve the tightness of the transmission between the transmission belt 24 and the driving wheel 23 and the driven wheel 22, thereby improving the transmission efficiency and precision.

[0050] As Figure 10 shown, in order to improve the stability of the ejection guide plate 17 and the ejector pin 15 when translating, a sliding guide rod 19 is arranged between the bottom of the cavity 2 and the pull plate 4 and penetrates the ejection guide plate 17.

[0051] In this embodiment, the operator can install different structural forms of the driving assembly 16 on the pull plate 4 according to the precision requirement of demolding, so as to adapt to different working conditions and increase the application range.

[0052] A wire rail (not shown) is installed below the movable mold plate 1 to realize the forward and backward translation of the movable mold plate 1, which belongs to the common knowledge in the art and will not be described here.

Claims

1. A movable platen structure for a multi-component injection molding machine, comprising a movable platen (1), characterized in that: The rear end face of the movable mold plate (1) and the positions on both sides thereof are provided with recess cavities (2), the upper and lower ends of the recess cavities (2) are provided with connecting rod frames (3), the two connecting rod frames (3) are provided with a pull plate (4), and the middle part of the plate face of the pull plate (4) is provided with a notch (5).

2. A movable platen structure for a multi-component injection molding machine as defined in claim 1, characterized in that: The front end of the movable mold plate (1) is provided with a groove (6), and the groove (6) is rotatably provided with a rotating disc (7).

3. A movable platen structure for a multi-component injection molding machine as defined in claim 2, wherein: The movable mold plate (1) is provided with a driving mechanism for driving the rotating disc (7) to rotate, the driving mechanism comprises a plurality of edge teeth (8) arranged on the outer periphery of the rotating disc (7), a gear (9) arranged on one side of the movable mold plate (1) and engaged with the edge teeth (8), and a first power source (10) arranged on one side of the movable mold plate (1) and used for driving the gear (9) to rotate.

4. The movable platen structure for a multi-component injection molding machine according to claim 2, wherein: The movable mold plate (1) is provided with a limiting mechanism for locking the circumferential position of the rotating disc (7), the limiting mechanism comprises a locking disc (11) arranged on the side end face of the rotating disc (7) away from the pull plate (4), two locking grooves (12) arranged on both sides of the edge of the locking disc (11), a locking block (13) arranged on one side of the locking disc (11), and a second power source (14) arranged on the movable mold plate (1) and used for driving the locking block (13) to enter or leave the locking groove (12).

5. A movable platen structure for a multi-component injection molding machine according to claim 2 or 3 or 4, characterized in that: The pull plate (4) is provided with a material ejecting mechanism on both sides of the notch (5) for driving the injection molded workpiece to separate from the rotating disc (7), the material ejecting mechanism comprises a plurality of ejecting pins (15) sequentially penetrating through the bottom of the groove (6) and the rotating disc (7), and a driving assembly (16) arranged on the pull plate (4) for driving the ejecting pins (15) to extend and retract.

6. A movable platen structure for a multi-component injection molding machine as defined in claim 5, wherein: The driving assembly (16) comprises an ejecting guide plate (17) arranged at the tail end of the ejecting pin (15), and a third power source (18) fixed to the pull plate (4) for driving the ejecting guide plate (17) to translate forward and backward.

7. A movable platen structure for a multi-component injection molding machine as defined in claim 6, wherein: A guide rod (19) slidingly penetrating through the ejecting guide plate (17) is arranged between the bottom of the recess cavity (2) and the pull plate (4).

8. The movable platen structure for a multi-component injection molding machine according to claim 5, wherein: The driving assembly (16) comprises an ejecting guide plate (17) arranged at the tail end of the ejecting pin (15), a lead screw (20) rotatably arranged between the pull plate (4) and the bottom of the recess cavity (2), a nut (21) arranged on the ejecting guide plate (17) and threadedly matched with the lead screw (20), and a power part connected to the lead screw (20) for driving the lead screw (20) to rotate circumferentially; when the lead screw (20) rotates circumferentially, it can drive the nut (21) to translate forward and backward.

9. A movable platen structure for a multi-component injection molding machine as defined in claim 8, wherein: The power part comprises a driven wheel (22) located on one side of the pull plate (4) away from the recess cavity (2) and connected to the lead screw (20), a driving wheel (23) located on one side of the driven wheel (22), a transmission belt (24) wound on the driving wheel (23) and the driven wheel (22), and a fourth power source (25) connected to the driving wheel (23) for driving the driving wheel (23) to rotate, and the plate face of the pull plate (4) away from the recess cavity (2) is provided with a tensioning wheel (26) for tensioning the transmission belt (24).

10. The movable platen structure for a multi-component injection molding machine of claim 8, wherein: A guide rod (19) slidingly penetrating through the ejecting guide plate (17) is arranged between the bottom of the recess cavity (2) and the pull plate (4).

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