A limiting structure for the injection stroke of a twin-bar twin-motor injection molding machine

Abstract

This utility model discloses a limiting structure for the injection stroke of a twin-bar, twin-motor injection molding machine, including a tailstock and a headstock. The tailstock and headstock are fixed together by four square-arranged tie rods. A middle frame is slidably connected to a lead screw. Limiting sleeves for blocking and limiting the middle frame are fixedly sleeved on the four square-arranged tie rods. The limiting sleeves are cylindrical in shape. This structure uses a double-limiting structure to solve problems such as deviations that are prone to occur in dual-drive structures. The advantages are that this ensures more precise limiting on both sides, more balanced force distribution, and can serve as a zero point for injection zeroing.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a glue injection stroke limiting structure for a twin-bar twin-motor injection molding machine. Background Technology

[0002] When the dual-bar dual-motor injection stage moves, the dual-drive structure is prone to output deviation, which can cause overall tilting. Therefore, the stroke limit structure of the dual-bar dual-motor injection mechanism is different from that of the single-bar injection mechanism. Utility Model Content

[0003] The purpose of this invention is to solve the problems mentioned above in the background technology and to propose a limit structure for the injection stroke of a twin-bar twin-motor injection molding machine.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A limiting structure for the injection stroke of a twin-bar twin-motor injection molding machine includes a tailstock and a headstock. The tailstock and headstock are fixed to each other by four square-arranged tie rods. A middle frame is slidably connected to the lead screw. Limiting sleeves for blocking and limiting the middle frame are fixedly sleeved on the four square-arranged tie rods. The limiting sleeves are cylindrical structures.

[0006] As a further embodiment of this utility model: two sets of drive components are detachably installed on the tailstock, and two lead screw assemblies are provided between the tailstock and the middle frame corresponding to the two sets of drive components. The drive components are used to drive the lead screw assemblies to rotate, and the lead screw assemblies can drive the middle frame to slide on the pull rod through rotation and extension.

[0007] As a further embodiment of this utility model: the drive assembly includes a motor, a belt and a synchronous pulley, the synchronous pulley is fixed at one end of the lead screw assembly, and the output shaft of the motor drives the synchronous pulley to rotate through the belt.

[0008] As a further embodiment of this utility model: the lead screw assembly includes a sleeve and a lead screw, one end of the sleeve is fixed to the middle frame, one end of the lead screw is rotatably connected to the tailstock, and the lead screw is threadedly connected to the sleeve.

[0009] As a further embodiment of this utility model: the inner wall of the sleeve is provided with a double-threaded structure, and the thread lead is equal to the pitch of the lead screw.

[0010] As a further embodiment of this invention, the belt is a synchronous toothed belt.

[0011] As a further embodiment of this invention: the surface of the belt is covered with a tensile nylon fiber layer.

[0012] As a further embodiment of this invention: the motor is a servo motor, and the output shafts of the two sets of motors are synchronously controlled by an encoder.

[0013] As a further embodiment of this utility model, a self-lubricating bearing is provided at the sliding connection between the middle frame and the tie rod.

[0014] As a further embodiment of this utility model: the surface of the pull rod is provided with a wear-resistant coating, the material of which is high-strength alloy steel.

[0015] The beneficial effects of this invention are as follows: This structure uses an intersecting double-limiting structure to solve problems such as deviation that easily occur in dual-drive structures. The advantages are that this ensures more precise limiting on both sides, more balanced force distribution, and it can also serve as the zero point for zeroing the injection process. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the planar structure of this utility model;

[0019] Figure 3 This is a partial structural schematic diagram of the present invention.

[0020] In the diagram: 1. Tail frame; 2. Middle frame; 3. Head frame; 4. Tie rod; 5. Motor; 6. Belt; 7. Lead screw assembly; 8. Limit sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1, please refer to Figure 1-3 As shown, this utility model is a limit structure for the injection stroke of a twin-bar twin-motor injection molding machine, including a tailstock 1 and a headstock 3. The tailstock 1 and the headstock 3 are fixed to each other by four square-arranged tie rods 4. A middle frame 2 is slidably connected to the lead screw 4. Limiting sleeves 8 for blocking and limiting the middle frame 2 are fixedly sleeved on the four square-arranged tie rods 4. The limiting sleeves 8 are cylindrical structures.

[0023] Example 2, please refer to Figure 1-3As shown, this utility model is a limit structure for the injection stroke of a twin-bar twin-motor injection molding machine, including a tailstock 1 and a headstock 3. The tailstock 1 and the headstock 3 are fixed to each other by four square-arranged tie rods 4. A middle frame 2 is slidably connected to the lead screw 4. Limiting sleeves 8 for blocking and limiting the middle frame 2 are fixedly sleeved on the four square-arranged tie rods 4. The limiting sleeves 8 are cylindrical structures.

[0024] Two sets of drive components are detachably installed on the tailstock 1. Two lead screw assemblies 7 are provided between the tailstock 1 and the middle frame 2 corresponding to the two sets of drive components. The drive components are used to drive the lead screw assemblies 7 to rotate. The lead screw assemblies 7 can drive the middle frame 2 to slide on the pull rod 4 through rotation and extension.

[0025] The drive assembly includes a motor 5, a belt 6, and a synchronous pulley. The synchronous pulley is fixed at one end of the lead screw assembly 7, and the output shaft of the motor 5 drives the synchronous pulley to rotate via the belt 6.

[0026] Example 3, please refer to Figure 1-3 As shown, this utility model is a limit structure for the injection stroke of a twin-bar twin-motor injection molding machine, including a tailstock 1 and a headstock 3. The tailstock 1 and the headstock 3 are fixed to each other by four square-arranged tie rods 4. A middle frame 2 is slidably connected to the lead screw 4. Limiting sleeves 8 for blocking and limiting the middle frame 2 are fixedly sleeved on the four square-arranged tie rods 4. The limiting sleeves 8 are cylindrical structures.

[0027] Two sets of drive components are detachably installed on the tailstock 1. Two lead screw assemblies 7 are provided between the tailstock 1 and the middle frame 2 corresponding to the two sets of drive components. The drive components are used to drive the lead screw assemblies 7 to rotate. The lead screw assemblies 7 can drive the middle frame 2 to slide on the pull rod 4 through rotation and extension.

[0028] The drive assembly includes a motor 5, a belt 6, and a synchronous pulley. The synchronous pulley is fixed at one end of the lead screw assembly 7, and the output shaft of the motor 5 drives the synchronous pulley to rotate via the belt 6.

[0029] The inner wall of the sleeve is provided with a double-threaded structure, and the thread lead is equal to the pitch of the lead screw. The belt 6 is a synchronous toothed belt. The surface of the belt 6 is covered with a tensile nylon fiber layer.

[0030] Example 4, please refer to Figure 1-3As shown, this utility model is a limit structure for the injection stroke of a twin-bar twin-motor injection molding machine, including a tailstock 1 and a headstock 3. The tailstock 1 and the headstock 3 are fixed to each other by four square-arranged tie rods 4. A middle frame 2 is slidably connected to the lead screw 4. Limiting sleeves 8 for blocking and limiting the middle frame 2 are fixedly sleeved on the four square-arranged tie rods 4. The limiting sleeves 8 are cylindrical structures.

[0031] Two sets of drive components are detachably installed on the tailstock 1. Two lead screw assemblies 7 are provided between the tailstock 1 and the middle frame 2 corresponding to the two sets of drive components. The drive components are used to drive the lead screw assemblies 7 to rotate. The lead screw assemblies 7 can drive the middle frame 2 to slide on the pull rod 4 through rotation and extension.

[0032] The drive assembly includes a motor 5, a belt 6, and a synchronous pulley. The synchronous pulley is fixed at one end of the lead screw assembly 7, and the output shaft of the motor 5 drives the synchronous pulley to rotate via the belt 6.

[0033] The inner wall of the sleeve is provided with a double-threaded structure, and the thread lead is equal to the pitch of the lead screw. The belt 6 is a synchronous toothed belt. The surface of the belt 6 is covered with a tensile nylon fiber layer.

[0034] The motor 5 is a servo motor, and the output shafts of the two sets of motors 5 are synchronously controlled by an encoder.

[0035] The sliding connection between the middle frame 2 and the tie rod 4 is provided with a self-lubricating bearing.

[0036] Example 5, please refer to Figure 1-3 As shown, this utility model is a limit structure for the injection stroke of a twin-bar twin-motor injection molding machine, including a tailstock 1 and a headstock 3. The tailstock 1 and the headstock 3 are fixed to each other by four square-arranged tie rods 4. A middle frame 2 is slidably connected to the lead screw 4. Limiting sleeves 8 for blocking and limiting the middle frame 2 are fixedly sleeved on the four square-arranged tie rods 4. The limiting sleeves 8 are cylindrical structures.

[0037] Two sets of drive components are detachably installed on the tailstock 1. Two lead screw assemblies 7 are provided between the tailstock 1 and the middle frame 2 corresponding to the two sets of drive components. The drive components are used to drive the lead screw assemblies 7 to rotate. The lead screw assemblies 7 can drive the middle frame 2 to slide on the pull rod 4 through rotation and extension.

[0038] The drive assembly includes a motor 5, a belt 6, and a synchronous pulley. The synchronous pulley is fixed at one end of the lead screw assembly 7, and the output shaft of the motor 5 drives the synchronous pulley to rotate via the belt 6.

[0039] The inner wall of the sleeve is provided with a double-threaded structure, and the thread lead is equal to the pitch of the lead screw. The belt 6 is a synchronous toothed belt. The surface of the belt 6 is covered with a tensile nylon fiber layer.

[0040] The motor 5 is a servo motor, and the output shafts of the two sets of motors 5 are synchronously controlled by an encoder.

[0041] The sliding connection between the middle frame 2 and the tie rod 4 is provided with a self-lubricating bearing.

[0042] The surface of the pull rod 4 is covered with a wear-resistant coating and is made of high-strength alloy steel.

[0043] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A limit structure for the injection stroke of a twin-bar twin-motor injection molding machine, characterized in that, It includes a tail frame (1) and a head frame (3). The tail frame (1) and the head frame (3) are fixed to each other by four square-arranged tie rods (4). A middle frame (2) is slidably connected to the lead screw (4). A limiting sleeve (8) for blocking and limiting the middle frame (2) is fixedly sleeved on the four square-arranged tie rods (4). The limiting sleeve (8) is a cylindrical structure.

2. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 1, characterized in that, Two sets of drive components are detachably installed on the tailstock (1). Two lead screw assemblies (7) are provided between the tailstock (1) and the middle frame (2) corresponding to the two sets of drive components. The drive components are used to drive the lead screw assemblies (7) to rotate. The lead screw assemblies (7) can drive the middle frame (2) to slide on the pull rod (4) by rotating and extending.

3. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 2, characterized in that, The drive assembly includes a motor (5), a belt (6) and a synchronous pulley. The synchronous pulley is fixed at one end of the lead screw assembly (7). The output shaft on the motor (5) drives the synchronous pulley to rotate through the belt (6).

4. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 2, characterized in that, The lead screw assembly (7) includes a sleeve and a lead screw. One end of the sleeve is fixed to the middle frame (2), and one end of the lead screw is rotatably connected to the tail frame (1). The lead screw is threadedly connected to the sleeve.

5. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 4, characterized in that, The inner wall of the sleeve is provided with a double-threaded structure, and the thread lead is equal to the pitch of the lead screw.

6. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 3, characterized in that, The belt (6) is a synchronous toothed belt.

7. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 3, characterized in that, The surface of the belt (6) is covered with a tensile nylon fiber layer.

8. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 3, characterized in that, The motor (5) is a servo motor, and the output shafts of the two sets of motors (5) are synchronously controlled by an encoder.

9. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 1, characterized in that, The sliding connection between the middle frame (2) and the tie rod (4) is provided with a self-lubricating bearing.

10. The injection stroke limiting structure of a twin-bar twin-motor injection molding machine according to claim 1, characterized in that, The surface of the pull rod (4) is provided with a wear-resistant coating, and its material is high-strength alloy steel.

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